Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

31 files changed, 11300 insertions, 0 deletions

diff --git a/intl/icu/source/tools/genrb/Makefile.in b/intl/icu/source/tools/genrb/Makefile.in
new file mode 100644
index 0000000000..336d839448
--- /dev/null
+++ b/intl/icu/source/tools/genrb/Makefile.in
@@ -0,0 +1,114 @@
+#################################################################################
+## Makefile.in for ICU - tools/genrb                                            #
+## Copyright (C) 2016 and later: Unicode, Inc. and others.                      #
+## License & terms of use: http://www.unicode.org/copyright.html                #
+## Copyright (c) 1999-2014, International Business Machines Corporation and     #
+## others. All Rights Reserved.                                                 #
+#################################################################################
+
+## Source directory information
+srcdir = @srcdir@
+top_srcdir = @top_srcdir@
+
+top_builddir = ../..
+
+include $(top_builddir)/icudefs.mk
+
+## Build directory information
+subdir = tools/genrb
+
+TARGET_STUB_NAME = genrb
+DERB_STUB_NAME = derb
+
+SECTION = 1
+
+MAN_FILES = $(TARGET_STUB_NAME).$(SECTION)
+@ICUIO_TRUE@MAN_FILES += $(DERB_STUB_NAME).$(SECTION)
+
+## Extra files to remove for 'make clean'
+CLEANFILES = *~ $(MAN_FILES) $(DEPS) $(DERB_DEPS)
+
+## Target information
+TARGET = $(BINDIR)/$(TARGET_STUB_NAME)$(EXEEXT)
+# derb depends on icuio
+@ICUIO_TRUE@DERB = $(BINDIR)/$(DERB_STUB_NAME)$(EXEEXT)
+
+CPPFLAGS += -I$(srcdir) -I$(top_srcdir)/common -I$(top_srcdir)/i18n -I$(srcdir)/../toolutil -I$(top_srcdir)/io
+CPPFLAGS += -DUNISTR_FROM_CHAR_EXPLICIT=explicit -DUNISTR_FROM_STRING_EXPLICIT=explicit
+LIBS = $(LIBICUTOOLUTIL) $(LIBICUI18N) $(LIBICUUC) $(DEFAULT_LIBS) $(LIB_M)
+
+SOURCES = $(shell cat $(srcdir)/sources.txt)
+OBJECTS = $(patsubst %.cpp,%.o,$(patsubst %.c,%.o, $(SOURCES)))
+DERB_SOURCES = derb.cpp
+DERB_OBJ = $(DERB_SOURCES:.cpp=.o)
+
+DEPS = $(OBJECTS:.o=.d)
+DERB_DEPS = $(DERB_OBJ:.o=.d)
+
+-include Makefile.local
+
+## List of phony targets
+.PHONY : all all-local install install-local clean clean-local	\
+distclean distclean-local dist dist-local check check-local install-man
+
+## Clear suffix list
+.SUFFIXES :
+
+## List of standard targets
+all: all-local
+install: install-local
+clean: clean-local
+distclean : distclean-local
+dist: dist-local
+check: all check-local
+
+all-local: $(TARGET) $(DERB) $(MAN_FILES)
+
+install-local: all-local install-man
+	$(MKINSTALLDIRS) $(DESTDIR)$(bindir)
+	$(INSTALL) $(TARGET) $(DESTDIR)$(bindir)
+@ICUIO_TRUE@	$(INSTALL) $(DERB) $(DESTDIR)$(bindir)
+
+install-man: $(MAN_FILES)
+	$(MKINSTALLDIRS) $(DESTDIR)$(mandir)/man$(SECTION)
+	$(INSTALL_DATA) $? $(DESTDIR)$(mandir)/man$(SECTION)
+
+dist-local:
+
+clean-local:
+	test -z "$(CLEANFILES)" || $(RMV) $(CLEANFILES)
+	$(RMV) $(TARGET) $(DERB) $(OBJECTS) $(DERB_OBJ)
+
+distclean-local: clean-local
+	$(RMV) Makefile
+
+check-local: all-local
+
+Makefile: $(srcdir)/Makefile.in  $(top_builddir)/config.status
+	cd $(top_builddir) \
+	 && CONFIG_FILES=$(subdir)/$@ CONFIG_HEADERS= $(SHELL) ./config.status
+
+$(TARGET) : $(OBJECTS)
+	$(LINK.cc) $(OUTOPT)$@ $^ $(LIBS)
+	$(POST_BUILD_STEP)
+
+$(DERB) : $(DERB_OBJ)
+	$(LINK.cc) $(OUTOPT)$@ $^ $(LIBICUIO) $(LIBS)
+	$(POST_BUILD_STEP)
+
+# This line is needed to serialize builds when the gmake -j option is used.
+$(TARGET_STUB_NAME).$(SECTION): $(DERB_STUB_NAME).$(SECTION)
+
+%.$(SECTION): $(srcdir)/%.$(SECTION).in
+	cd $(top_builddir) \
+	 && CONFIG_FILES=$(subdir)/$@ CONFIG_HEADERS= $(SHELL) ./config.status
+
+
+ifeq (,$(MAKECMDGOALS))
+-include $(DEPS)
+-include $(DERB_DEPS)
+else
+ifneq ($(patsubst %clean,,$(MAKECMDGOALS)),)
+-include $(DEPS)
+endif
+endif
diff --git a/intl/icu/source/tools/genrb/derb.1.in b/intl/icu/source/tools/genrb/derb.1.in
new file mode 100644
index 0000000000..725b571ce2
--- /dev/null
+++ b/intl/icu/source/tools/genrb/derb.1.in
@@ -0,0 +1,198 @@
+.\" Hey, Emacs! This is -*-nroff-*- you know...
+.\"
+.\" derb.1: manual page for the derb utility
+.\"
+.\" Copyright (C) 2016 and later: Unicode, Inc. and others.
+.\" License & terms of use: http://www.unicode.org/copyright.html
+.\" Copyright (C) 2000-2014 IBM, Inc. and others.
+.\"
+.TH DERB 1 "7 Mar 2014" "ICU MANPAGE" "ICU @VERSION@ Manual"
+.SH NAME
+.B derb
+\- disassemble a resource bundle
+.SH SYNOPSIS
+.B derb
+[
+.BR "\-h\fP, \fB\-?\fP, \fB\-\-help"
+]
+[
+.BR "\-V\fP, \fB\-\-version"
+]
+[
+.BR "\-v\fP, \fB\-\-verbose"
+]
+[
+.BI "\-e\fP, \fB\-\-encoding" " encoding"
+]
+[
+.BI "\-\-bom"
+]
+[
+.BI "\-t\fP, \fB\-\-truncate" " \fR[ \fPsize\fR ]\fP"
+]
+[
+.BI "\-s\fP, \fB\-\-sourcedir" " source"
+]
+[
+.BI "\-d\fP, \fB\-\-destdir" " destination"
+]
+[
+.BI "\-i\fP, \fB\-\-icudatadir" " directory"
+]
+[
+.BI "\-c\fP, \fB\-\-to\-stdout"
+]
+.IR bundle " \.\.\."
+.SH DESCRIPTION
+.B derb
+reads the compiled resource
+.I bundle
+files passed on the command line and write them back in text form.
+The resulting text files have a
+.B .txt
+extension while compiled resource bundle source files typically have a 
+.B .res
+extension.
+.PP
+It is customary to name the resource bundles by their locale name,
+i.e. to use a local identifier for the
+.I bundle
+filename, e.g.
+.B ja_JP.res
+for Japanese (Japan) data, or
+.B root.res
+for the root bundle.
+This is especially important for
+.B derb
+since the locale name is not accessible directly from the compiled
+resource bundle, and to know which locale to ask for when opening
+the bundle.
+.B derb
+will produce a file whose base name is the base name of the compiled resource file itself.
+If the
+.BI "\-\-to\-stdout\fP, \fB\-c\fP"
+option is used, however, the text will be written on the standard output.
+.SH OPTIONS
+.TP
+.BR "\-h\fP, \fB\-?\fP, \fB\-\-help"
+Print help about usage and exit.
+.TP
+.BR "\-V\fP, \fB\-\-version"
+Print the version of
+.B derb
+and exit.
+.TP
+.BR "\-v\fP, \fB\-\-verbose"
+Display extra informative messages during execution.
+.TP
+.BR "\-A\fP, \fB\-\-suppressAliases"
+Don't follow aliases when producing output.
+.TP
+.BI "\-e\fP, \fB\-\-encoding" " encoding"
+Set the encoding used to write output files to
+.IR encoding .
+The default encoding is the invariant (subset of ASCII or EBCDIC)
+codepage for the system (see section
+.BR "INVARIANT CHARACTERS" ).
+The choice of the encoding does not affect the data, just their
+representation. Characters that cannot be represented in the
+.I encoding
+will be represented using
+.BI \eu "hhhh"
+escape sequences.
+.TP
+.BI "\-\-bom"
+Write a byte order mark (BOM) at the beginning of the file.
+.TP
+.BI "\-l\fP, \fB\-\-locale" " locale"
+Set the
+.I locale
+for the resource bundle, which is used both in the generated text and
+as the base name of the output file.
+.TP
+.BI "\-t\fP, \fB\-\-truncate" " \fR[ \fPsize\fR ]\fP"
+Truncate individual resources (strings or binary data) to
+.I size
+bytes. The default if
+.I size
+is not specified is
+.B 80
+bytes.
+.TP
+.BI "\-s\fP, \fB\-\-sourcedir" " source"
+Set the source directory to
+.IR source .
+The default source directory is the current directory.
+If 
+.B -
+is passed for
+.IR source ,
+then the
+.I bundle
+will be looked for in its default location, specified by
+the 
+.B ICU_DATA
+environment variable (or defaulting to
+the location set when ICU was built if 
+.B ICU_DATA
+is not set).
+.TP
+.BI "\-d\fP, \fB\-\-destdir" " destination"
+Set the destination directory to
+.IR destination .
+The default destination directory is specified by the environment variable
+.BR ICU_DATA
+or is the location set when ICU was built if 
+.B ICU_DATA
+is not set.
+.TP
+.BI "\-i\fP, \fB\-\-icudatadir" " directory"
+Look for any necessary ICU data files in
+.IR directory .
+For example, when processing collation overrides, the file
+.B ucadata.dat
+must be located.
+The default ICU data directory is specified by the environment variable
+.BR ICU_DATA .
+.TP
+.BI "\-c\fP, \fB\-\-to\-stdout"
+Write the disassembled
+.I bundle
+on standard output instead of into a file.
+.SH CAVEATS
+When the option
+.BI \-\-bom
+is used, the character
+.B U+FEFF
+is written in the destination
+.I encoding
+regardless of whether it is a Unicode transformation format (UTF) or not.
+This option should only be used with an UTF encoding, as byte order marks
+are not meaningful for other encodings.
+.SH INVARIANT CHARACTERS
+The
+.B invariant character set
+consists of the following set of characters, expressed as a standard POSIX
+regular expression:
+.BR "[a-z]|[A-Z]|[0-9]|_| |+|-|*|/" .
+This is the set which is guaranteed to be available regardless of code page.
+.SH ENVIRONMENT
+.TP 10
+.B ICU_DATA
+Specifies the directory containing ICU data. Defaults to
+.BR @thepkgicudatadir@/@PACKAGE@/@VERSION@/ .
+Some tools in ICU depend on the presence of the trailing slash. It is thus
+important to make sure that it is present if
+.B ICU_DATA
+is set.
+.SH AUTHORS
+Vladimir Weinstein
+.br
+Yves Arrouye
+.SH VERSION
+1.0
+.SH COPYRIGHT
+Copyright (C) 2002 IBM, Inc. and others.
+.SH SEE ALSO
+.BR genrb (1)
+
diff --git a/intl/icu/source/tools/genrb/derb.cpp b/intl/icu/source/tools/genrb/derb.cpp
new file mode 100644
index 0000000000..3b28289569
--- /dev/null
+++ b/intl/icu/source/tools/genrb/derb.cpp
@@ -0,0 +1,657 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 1999-2016, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*   file name:  derb.cpp
+*   encoding:   UTF-8
+*   tab size:   8 (not used)
+*   indentation:4
+*
+*   created on: 2000sep6
+*   created by: Vladimir Weinstein as an ICU workshop example
+*   maintained by: Yves Arrouye <yves@realnames.com>
+*/
+
+#include "unicode/stringpiece.h"
+#include "unicode/ucnv.h"
+#include "unicode/unistr.h"
+#include "unicode/ustring.h"
+#include "unicode/putil.h"
+#include "unicode/ustdio.h"
+
+#include "charstr.h"
+#include "uresimp.h"
+#include "cmemory.h"
+#include "cstring.h"
+#include "uoptions.h"
+#include "toolutil.h"
+#include "ustrfmt.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+#define DERB_VERSION "1.1"
+
+#define DERB_DEFAULT_TRUNC 80
+
+static const int32_t indentsize = 4;
+static int32_t truncsize = DERB_DEFAULT_TRUNC;
+static UBool opt_truncate = false;
+
+static const char *getEncodingName(const char *encoding);
+static void reportError(const char *pname, UErrorCode *status, const char *when);
+static char16_t *quotedString(const char16_t *string);
+static void printOutBundle(UFILE *out, UResourceBundle *resource, int32_t indent, const char *pname, UErrorCode *status);
+static void printString(UFILE *out, const char16_t *str, int32_t len);
+static void printCString(UFILE *out, const char *str, int32_t len);
+static void printIndent(UFILE *out, int32_t indent);
+static void printHex(UFILE *out, uint8_t what);
+
+static UOption options[]={
+    UOPTION_HELP_H,
+    UOPTION_HELP_QUESTION_MARK,
+/* 2 */    UOPTION_ENCODING,
+/* 3 */    { "to-stdout", nullptr, nullptr, nullptr, 'c', UOPT_NO_ARG, 0 } ,
+/* 4 */    { "truncate", nullptr, nullptr, nullptr, 't', UOPT_OPTIONAL_ARG, 0 },
+/* 5 */    UOPTION_VERBOSE,
+/* 6 */    UOPTION_DESTDIR,
+/* 7 */    UOPTION_SOURCEDIR,
+/* 8 */    { "bom", nullptr, nullptr, nullptr, 0, UOPT_NO_ARG, 0 },
+/* 9 */    UOPTION_ICUDATADIR,
+/* 10 */   UOPTION_VERSION,
+/* 11 */   { "suppressAliases", nullptr, nullptr, nullptr, 'A', UOPT_NO_ARG, 0 },
+};
+
+static UBool verbose = false;
+static UBool suppressAliases = false;
+static UFILE *ustderr = nullptr;
+
+extern int
+main(int argc, char* argv[]) {
+    const char *encoding = nullptr;
+    const char *outputDir = nullptr; /* nullptr = no output directory, use current */
+    const char *inputDir  = ".";
+    int tostdout = 0;
+    int prbom = 0;
+
+    const char *pname;
+
+    UResourceBundle *bundle = nullptr;
+    int32_t i = 0;
+
+    const char* arg;
+
+    /* Get the name of tool. */
+    pname = uprv_strrchr(*argv, U_FILE_SEP_CHAR);
+#if U_FILE_SEP_CHAR != U_FILE_ALT_SEP_CHAR
+    if (!pname) {
+        pname = uprv_strrchr(*argv, U_FILE_ALT_SEP_CHAR);
+    }
+#endif
+    if (!pname) {
+        pname = *argv;
+    } else {
+        ++pname;
+    }
+
+    /* error handling, printing usage message */
+    argc=u_parseArgs(argc, argv, UPRV_LENGTHOF(options), options);
+
+    /* error handling, printing usage message */
+    if(argc<0) {
+        fprintf(stderr,
+            "%s: error in command line argument \"%s\"\n", pname,
+            argv[-argc]);
+    }
+    if(argc<0 || options[0].doesOccur || options[1].doesOccur) {
+        fprintf(argc < 0 ? stderr : stdout,
+            "%csage: %s [ -h, -?, --help ] [ -V, --version ]\n"
+            " [ -v, --verbose ] [ -e, --encoding encoding ] [ --bom ]\n"
+            " [ -t, --truncate [ size ] ]\n"
+            " [ -s, --sourcedir source ] [ -d, --destdir destination ]\n"
+            " [ -i, --icudatadir directory ] [ -c, --to-stdout ]\n"
+            " [ -A, --suppressAliases]\n"
+            " bundle ...\n", argc < 0 ? 'u' : 'U',
+            pname);
+        return argc<0 ? U_ILLEGAL_ARGUMENT_ERROR : U_ZERO_ERROR;
+    }
+
+    if(options[10].doesOccur) {
+        fprintf(stderr,
+                "%s version %s (ICU version %s).\n"
+                "%s\n",
+                pname, DERB_VERSION, U_ICU_VERSION, U_COPYRIGHT_STRING);
+        return U_ZERO_ERROR;
+    }
+    if(options[2].doesOccur) {
+        encoding = options[2].value;
+    }
+
+    if (options[3].doesOccur) {
+      if(options[2].doesOccur) {
+        fprintf(stderr, "%s: Error: don't specify an encoding (-e) when writing to stdout (-c).\n", pname);
+        return 3;
+      }
+      tostdout = 1;
+    }
+
+    if(options[4].doesOccur) {
+        opt_truncate = true;
+        if(options[4].value != nullptr) {
+            truncsize = atoi(options[4].value); /* user defined printable size */
+        } else {
+            truncsize = DERB_DEFAULT_TRUNC; /* we'll use default omitting size */
+        }
+    } else {
+        opt_truncate = false;
+    }
+
+    if(options[5].doesOccur) {
+        verbose = true;
+    }
+
+    if (options[6].doesOccur) {
+        outputDir = options[6].value;
+    }
+
+    if(options[7].doesOccur) {
+        inputDir = options[7].value; /* we'll use users resources */
+    }
+
+    if (options[8].doesOccur) {
+        prbom = 1;
+    }
+
+    if (options[9].doesOccur) {
+        u_setDataDirectory(options[9].value);
+    }
+
+    if (options[11].doesOccur) {
+      suppressAliases = true;
+    }
+
+    fflush(stderr); // use ustderr now.
+    ustderr = u_finit(stderr, nullptr, nullptr);
+
+    for (i = 1; i < argc; ++i) {
+        static const char16_t sp[] = { 0x0020 }; /* " " */
+
+        arg = getLongPathname(argv[i]);
+
+        if (verbose) {
+          u_fprintf(ustderr, "processing bundle \"%s\"\n", argv[i]);
+        }
+
+        icu::CharString locale;
+        UErrorCode status = U_ZERO_ERROR;
+        {
+            const char *p = findBasename(arg);
+            const char *q = uprv_strrchr(p, '.');
+            if (q == nullptr) {
+                locale.append(p, status);
+            } else {
+                locale.append(p, (int32_t)(q - p), status);
+            }
+        }
+        if (U_FAILURE(status)) {
+            return status;
+        }
+
+        icu::CharString infile;
+        const char *thename = nullptr;
+        UBool fromICUData = !uprv_strcmp(inputDir, "-");
+        if (!fromICUData) {
+            UBool absfilename = *arg == U_FILE_SEP_CHAR;
+#if U_PLATFORM_HAS_WIN32_API
+            if (!absfilename) {
+                absfilename = (uprv_strlen(arg) > 2 && isalpha(arg[0])
+                    && arg[1] == ':' && arg[2] == U_FILE_SEP_CHAR);
+            }
+#endif
+            if (absfilename) {
+                thename = arg;
+            } else {
+                const char *q = uprv_strrchr(arg, U_FILE_SEP_CHAR);
+#if U_FILE_SEP_CHAR != U_FILE_ALT_SEP_CHAR
+                if (q == nullptr) {
+                    q = uprv_strrchr(arg, U_FILE_ALT_SEP_CHAR);
+                }
+#endif
+                infile.append(inputDir, status);
+                if(q != nullptr) {
+                    infile.appendPathPart(icu::StringPiece(arg, (int32_t)(q - arg)), status);
+                }
+                if (U_FAILURE(status)) {
+                    return status;
+                }
+                thename = infile.data();
+            }
+        }
+        if (thename) {
+            bundle = ures_openDirect(thename, locale.data(), &status);
+        } else {
+            bundle = ures_open(fromICUData ? 0 : inputDir, locale.data(), &status);
+        }
+        if (U_SUCCESS(status)) {
+            UFILE *out = nullptr;
+
+            const char *filename = 0;
+            const char *ext = 0;
+
+            if (locale.isEmpty() || !tostdout) {
+                filename = findBasename(arg);
+                ext = uprv_strrchr(filename, '.');
+                if (!ext) {
+                    ext = uprv_strchr(filename, 0);
+                }
+            }
+
+            if (tostdout) {
+                out = u_get_stdout();
+            } else {
+                icu::CharString thefile;
+                if (outputDir) {
+                    thefile.append(outputDir, status);
+                }
+                thefile.appendPathPart(filename, status);
+                if (*ext) {
+                    thefile.truncate(thefile.length() - (int32_t)uprv_strlen(ext));
+                }
+                thefile.append(".txt", status);
+                if (U_FAILURE(status)) {
+                    return status;
+                }
+
+                out = u_fopen(thefile.data(), "w", nullptr, encoding);
+                if (!out) {
+                  u_fprintf(ustderr, "%s: couldn't create %s\n", pname, thefile.data());
+                  u_fclose(ustderr);
+                  return 4;
+                }
+            }
+
+            // now, set the callback.
+            ucnv_setFromUCallBack(u_fgetConverter(out), UCNV_FROM_U_CALLBACK_ESCAPE, UCNV_ESCAPE_C, 0, 0, &status);
+            if (U_FAILURE(status)) {
+              u_fprintf(ustderr, "%s: couldn't configure converter for encoding\n", pname);
+              u_fclose(ustderr);
+              if(!tostdout) {
+                u_fclose(out);
+              }
+              return 3;
+            }
+
+            if (prbom) { /* XXX: Should be done only for UTFs */
+              u_fputc(0xFEFF, out);
+            }
+            u_fprintf(out, "// -*- Coding: %s; -*-\n//\n", encoding ? encoding : getEncodingName(ucnv_getDefaultName()));
+            u_fprintf(out, "// This file was dumped by derb(8) from ");
+            if (thename) {
+              u_fprintf(out, "%s", thename);
+            } else if (fromICUData) {
+              u_fprintf(out, "the ICU internal %s locale", locale.data());
+            }
+
+            u_fprintf(out, "\n// derb(8) by Vladimir Weinstein and Yves Arrouye\n\n");
+
+            if (!locale.isEmpty()) {
+              u_fprintf(out, "%s", locale.data());
+            } else {
+              u_fprintf(out, "%.*s%.*S", (int32_t)(ext - filename),  filename, UPRV_LENGTHOF(sp), sp);
+            }
+            printOutBundle(out, bundle, 0, pname, &status);
+
+            if (!tostdout) {
+                u_fclose(out);
+            }
+        }
+        else {
+            reportError(pname, &status, "opening resource file");
+        }
+
+        ures_close(bundle);
+    }
+
+    return 0;
+}
+
+static char16_t *quotedString(const char16_t *string) {
+    int len = u_strlen(string);
+    int alen = len;
+    const char16_t *sp;
+    char16_t *newstr, *np;
+
+    for (sp = string; *sp; ++sp) {
+        switch (*sp) {
+            case '\n':
+            case 0x0022:
+                ++alen;
+                break;
+        }
+    }
+
+    newstr = (char16_t *) uprv_malloc((1 + alen) * U_SIZEOF_UCHAR);
+    for (sp = string, np = newstr; *sp; ++sp) {
+        switch (*sp) {
+            case '\n':
+                *np++ = 0x005C;
+                *np++ = 0x006E;
+                break;
+
+            case 0x0022:
+                *np++ = 0x005C;
+                U_FALLTHROUGH;
+            default:
+                *np++ = *sp;
+                break;
+        }
+    }
+    *np = 0;
+
+    return newstr;
+}
+
+
+static void printString(UFILE *out, const char16_t *str, int32_t len) {
+  u_file_write(str, len, out);
+}
+
+static void printCString(UFILE *out, const char *str, int32_t len) {
+  if(len==-1) {
+    u_fprintf(out, "%s", str);
+  } else {
+    u_fprintf(out, "%.*s", len, str);
+  }
+}
+
+static void printIndent(UFILE *out, int32_t indent) {
+    icu::UnicodeString inchar(indent, 0x20, indent);
+    printString(out, inchar.getBuffer(), indent);
+}
+
+static void printHex(UFILE *out, uint8_t what) {
+    static const char map[] = "0123456789ABCDEF";
+    char16_t hex[2];
+
+    hex[0] = map[what >> 4];
+    hex[1] = map[what & 0xf];
+
+    printString(out, hex, 2);
+}
+
+static void printOutAlias(UFILE *out,  UResourceBundle *parent, Resource r, const char *key, int32_t indent, const char *pname, UErrorCode *status) {
+    static const char16_t cr[] = { 0xA };  // LF
+    int32_t len = 0;
+    const char16_t* thestr = res_getAlias(&(parent->getResData()), r, &len);
+    char16_t *string = quotedString(thestr);
+    if(opt_truncate && len > truncsize) {
+        char msg[128];
+        printIndent(out, indent);
+        snprintf(msg, sizeof(msg), "// WARNING: this resource, size %li is truncated to %li\n",
+            (long)len, (long)truncsize/2);
+        printCString(out, msg, -1);
+        len = truncsize;
+    }
+    if(U_SUCCESS(*status)) {
+        static const char16_t openStr[] = { 0x003A, 0x0061, 0x006C, 0x0069, 0x0061, 0x0073, 0x0020, 0x007B, 0x0020, 0x0022 }; /* ":alias { \"" */
+        static const char16_t closeStr[] = { 0x0022, 0x0020, 0x007D, 0x0020 }; /* "\" } " */
+        printIndent(out, indent);
+        if(key != nullptr) {
+            printCString(out, key, -1);
+        }
+        printString(out, openStr, UPRV_LENGTHOF(openStr));
+        printString(out, string, len);
+        printString(out, closeStr, UPRV_LENGTHOF(closeStr));
+        if(verbose) {
+            printCString(out, " // ALIAS", -1);
+        }
+        printString(out, cr, UPRV_LENGTHOF(cr));
+    } else {
+        reportError(pname, status, "getting binary value");
+    }
+    uprv_free(string);
+}
+
+static void printOutBundle(UFILE *out, UResourceBundle *resource, int32_t indent, const char *pname, UErrorCode *status)
+{
+    static const char16_t cr[] = { 0xA };  // LF
+
+/*    int32_t noOfElements = ures_getSize(resource);*/
+    int32_t i = 0;
+    const char *key = ures_getKey(resource);
+
+    switch(ures_getType(resource)) {
+    case URES_STRING :
+        {
+            int32_t len=0;
+            const char16_t* thestr = ures_getString(resource, &len, status);
+            char16_t *string = quotedString(thestr);
+
+            /* TODO: String truncation */
+            if(opt_truncate && len > truncsize) {
+                char msg[128];
+                printIndent(out, indent);
+                snprintf(msg, sizeof(msg), "// WARNING: this resource, size %li is truncated to %li\n",
+                        (long)len, (long)(truncsize/2));
+                printCString(out, msg, -1);
+                len = truncsize/2;
+            }
+            printIndent(out, indent);
+            if(key != nullptr) {
+                static const char16_t openStr[] = { 0x0020, 0x007B, 0x0020, 0x0022 }; /* " { \"" */
+                static const char16_t closeStr[] = { 0x0022, 0x0020, 0x007D }; /* "\" }" */
+                printCString(out, key, (int32_t)uprv_strlen(key));
+                printString(out, openStr, UPRV_LENGTHOF(openStr));
+                printString(out, string, len);
+                printString(out, closeStr, UPRV_LENGTHOF(closeStr));
+            } else {
+                static const char16_t openStr[] = { 0x0022 }; /* "\"" */
+                static const char16_t closeStr[] = { 0x0022, 0x002C }; /* "\"," */
+
+                printString(out, openStr, UPRV_LENGTHOF(openStr));
+                printString(out, string, (int32_t)(u_strlen(string)));
+                printString(out, closeStr, UPRV_LENGTHOF(closeStr));
+            }
+
+            if(verbose) {
+                printCString(out, "// STRING", -1);
+            }
+            printString(out, cr, UPRV_LENGTHOF(cr));
+
+            uprv_free(string);
+        }
+        break;
+
+    case URES_INT :
+        {
+            static const char16_t openStr[] = { 0x003A, 0x0069, 0x006E, 0x0074, 0x0020, 0x007B, 0x0020 }; /* ":int { " */
+            static const char16_t closeStr[] = { 0x0020, 0x007D }; /* " }" */
+            char16_t num[20];
+
+            printIndent(out, indent);
+            if(key != nullptr) {
+                printCString(out, key, -1);
+            }
+            printString(out, openStr, UPRV_LENGTHOF(openStr));
+            uprv_itou(num, 20, ures_getInt(resource, status), 10, 0);
+            printString(out, num, u_strlen(num));
+            printString(out, closeStr, UPRV_LENGTHOF(closeStr));
+
+            if(verbose) {
+                printCString(out, "// INT", -1);
+            }
+            printString(out, cr, UPRV_LENGTHOF(cr));
+            break;
+        }
+    case URES_BINARY :
+        {
+            int32_t len = 0;
+            const int8_t *data = (const int8_t *)ures_getBinary(resource, &len, status);
+            if(opt_truncate && len > truncsize) {
+                char msg[128];
+                printIndent(out, indent);
+                snprintf(msg, sizeof(msg), "// WARNING: this resource, size %li is truncated to %li\n",
+                        (long)len, (long)(truncsize/2));
+                printCString(out, msg, -1);
+                len = truncsize;
+            }
+            if(U_SUCCESS(*status)) {
+                static const char16_t openStr[] = { 0x003A, 0x0062, 0x0069, 0x006E, 0x0061, 0x0072, 0x0079, 0x0020, 0x007B, 0x0020 }; /* ":binary { " */
+                static const char16_t closeStr[] = { 0x0020, 0x007D, 0x0020 }; /* " } " */
+                printIndent(out, indent);
+                if(key != nullptr) {
+                    printCString(out, key, -1);
+                }
+                printString(out, openStr, UPRV_LENGTHOF(openStr));
+                for(i = 0; i<len; i++) {
+                    printHex(out, *data++);
+                }
+                printString(out, closeStr, UPRV_LENGTHOF(closeStr));
+                if(verbose) {
+                    printCString(out, " // BINARY", -1);
+                }
+                printString(out, cr, UPRV_LENGTHOF(cr));
+            } else {
+                reportError(pname, status, "getting binary value");
+            }
+        }
+        break;
+    case URES_INT_VECTOR :
+        {
+            int32_t len = 0;
+            const int32_t *data = ures_getIntVector(resource, &len, status);
+            if(U_SUCCESS(*status)) {
+                static const char16_t openStr[] = { 0x003A, 0x0069, 0x006E, 0x0074, 0x0076, 0x0065, 0x0063, 0x0074, 0x006F, 0x0072, 0x0020, 0x007B, 0x0020 }; /* ":intvector { " */
+                static const char16_t closeStr[] = { 0x0020, 0x007D, 0x0020 }; /* " } " */
+                char16_t num[20];
+
+                printIndent(out, indent);
+                if(key != nullptr) {
+                    printCString(out, key, -1);
+                }
+                printString(out, openStr, UPRV_LENGTHOF(openStr));
+                for(i = 0; i < len - 1; i++) {
+                    int32_t numLen =  uprv_itou(num, 20, data[i], 10, 0);
+                    num[numLen++] = 0x002C; /* ',' */
+                    num[numLen++] = 0x0020; /* ' ' */
+                    num[numLen] = 0;
+                    printString(out, num, u_strlen(num));
+                }
+                if(len > 0) {
+                    uprv_itou(num, 20, data[len - 1], 10, 0);
+                    printString(out, num, u_strlen(num));
+                }
+                printString(out, closeStr, UPRV_LENGTHOF(closeStr));
+                if(verbose) {
+                    printCString(out, "// INTVECTOR", -1);
+                }
+                printString(out, cr, UPRV_LENGTHOF(cr));
+            } else {
+                reportError(pname, status, "getting int vector");
+            }
+      }
+      break;
+    case URES_TABLE :
+    case URES_ARRAY :
+        {
+            static const char16_t openStr[] = { 0x007B }; /* "{" */
+            static const char16_t closeStr[] = { 0x007D, '\n' }; /* "}\n" */
+
+            UResourceBundle *t = nullptr;
+            ures_resetIterator(resource);
+            printIndent(out, indent);
+            if(key != nullptr) {
+                printCString(out, key, -1);
+            }
+            printString(out, openStr, UPRV_LENGTHOF(openStr));
+            if(verbose) {
+                if(ures_getType(resource) == URES_TABLE) {
+                    printCString(out, "// TABLE", -1);
+                } else {
+                    printCString(out, "// ARRAY", -1);
+                }
+            }
+            printString(out, cr, UPRV_LENGTHOF(cr));
+
+            if(suppressAliases == false) {
+              while(U_SUCCESS(*status) && ures_hasNext(resource)) {
+                  t = ures_getNextResource(resource, t, status);
+                  if(U_SUCCESS(*status)) {
+                    printOutBundle(out, t, indent+indentsize, pname, status);
+                  } else {
+                    reportError(pname, status, "While processing table");
+                    *status = U_ZERO_ERROR;
+                  }
+              }
+            } else { /* we have to use low level access to do this */
+              Resource r;
+              int32_t resSize = ures_getSize(resource);
+              UBool isTable = (UBool)(ures_getType(resource) == URES_TABLE);
+              for(i = 0; i < resSize; i++) {
+                /* need to know if it's an alias */
+                if(isTable) {
+                  r = res_getTableItemByIndex(&resource->getResData(), resource->fRes, i, &key);
+                } else {
+                  r = res_getArrayItem(&resource->getResData(), resource->fRes, i);
+                }
+                if(U_SUCCESS(*status)) {
+                  if(res_getPublicType(r) == URES_ALIAS) {
+                    printOutAlias(out, resource, r, key, indent+indentsize, pname, status);
+                  } else {
+                    t = ures_getByIndex(resource, i, t, status);
+                    printOutBundle(out, t, indent+indentsize, pname, status);
+                  }
+                } else {
+                  reportError(pname, status, "While processing table");
+                  *status = U_ZERO_ERROR;
+                }
+              }
+            }
+
+            printIndent(out, indent);
+            printString(out, closeStr, UPRV_LENGTHOF(closeStr));
+            ures_close(t);
+        }
+        break;
+    default:
+        break;
+    }
+
+}
+
+static const char *getEncodingName(const char *encoding) {
+    UErrorCode err;
+    const char *enc;
+
+    err = U_ZERO_ERROR;
+    if (!(enc = ucnv_getStandardName(encoding, "MIME", &err))) {
+        err = U_ZERO_ERROR;
+        if (!(enc = ucnv_getStandardName(encoding, "IANA", &err))) {
+            // do nothing
+        }
+    }
+
+    return enc;
+}
+
+static void reportError(const char *pname, UErrorCode *status, const char *when) {
+  u_fprintf(ustderr, "%s: error %d while %s: %s\n", pname, *status, when, u_errorName(*status));
+}
+
+#else
+extern int
+main(int argc, char* argv[]) {
+    /* Changing stdio.h ustdio.h requires that formatting not be disabled. */
+    return 3;
+}
+#endif /* !UCONFIG_NO_FORMATTING */
+
+/*
+ * Local Variables:
+ * indent-tabs-mode: nil
+ * End:
+ */
diff --git a/intl/icu/source/tools/genrb/derb.vcxproj b/intl/icu/source/tools/genrb/derb.vcxproj
new file mode 100644
index 0000000000..f5ba9bf22f
--- /dev/null
+++ b/intl/icu/source/tools/genrb/derb.vcxproj
@@ -0,0 +1,80 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{D3065ADB-8820-4CC7-9B6C-9510833961A3}</ProjectGuid>
+  </PropertyGroup>
+  <PropertyGroup Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseOfMfc>false</UseOfMfc>
+    <CharacterSet>MultiByte</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <!-- The following import will include the 'default' configuration options for VS projects. -->
+  <Import Project="..\..\allinone\Build.Windows.ProjectConfiguration.props" />
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup>
+    <_ProjectFileVersion>10.0.30319.1</_ProjectFileVersion>
+    <OutDir>.\$(Platform)\$(Configuration)\</OutDir>
+    <IntDir>.\$(Platform)\$(Configuration)\</IntDir>
+    <!-- The ICU projects use "Win32" to mean "x86", so we need to special case it. -->
+    <OutDir Condition="'$(Platform)'=='Win32'">.\x86\$(Configuration)\</OutDir>
+    <IntDir Condition="'$(Platform)'=='Win32'">.\x86\$(Configuration)\</IntDir>
+    <!-- Disable Incremental Linking for Release builds as it prevents Link-time Code Generation -->
+    <LinkIncremental Condition="'$(Configuration)'=='Debug'">true</LinkIncremental>
+    <LinkIncremental Condition="'$(Configuration)'=='Release'">false</LinkIncremental>
+  </PropertyGroup>
+  <!-- Options that are common to *all* configurations -->
+  <ItemDefinitionGroup>
+    <Midl>
+      <TypeLibraryName>$(OutDir)/derb.tlb</TypeLibraryName>
+    </Midl>
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <CompileAs>Default</CompileAs>
+      <DisableLanguageExtensions>true</DisableLanguageExtensions>
+      <AdditionalIncludeDirectories>..\..\i18n;..\..\common;..\toolutil;..\..\io;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PrecompiledHeaderOutputFile>$(OutDir)/derb.pch</PrecompiledHeaderOutputFile>
+      <AssemblerListingLocation>$(OutDir)/</AssemblerListingLocation>
+      <ObjectFileName>$(OutDir)/</ObjectFileName>
+      <ProgramDataBaseFileName>$(OutDir)/derb.pdb</ProgramDataBaseFileName>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <OutputFile>$(OutDir)/derb.exe</OutputFile>
+      <AdditionalLibraryDirectories>..\..\..\$(IcuLibOutputDir);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+    </Link>
+    <CustomBuildStep>
+      <Command>copy "$(TargetPath)" ..\..\..\$(IcuBinOutputDir)</Command>
+      <Outputs>..\..\..\$(IcuBinOutputDir)\$(TargetFileName);%(Outputs)</Outputs>
+    </CustomBuildStep>
+  </ItemDefinitionGroup>
+  <!-- Options that are common to all 'Debug' project configurations -->
+  <ItemDefinitionGroup Condition="'$(Configuration)'=='Debug'">
+    <ClCompile>
+      <BrowseInformation>true</BrowseInformation>
+      <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
+    </ClCompile>
+    <Link>
+      <AdditionalDependencies>icuucd.lib;icuind.lib;icuiod.lib;icutud.lib;%(AdditionalDependencies)</AdditionalDependencies>
+    </Link>
+  </ItemDefinitionGroup>
+  <!-- Options that are common to all 'Release' project configurations -->
+  <ItemDefinitionGroup Condition="'$(Configuration)'=='Release'">
+    <ClCompile>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+    </ClCompile>
+    <Link>
+      <AdditionalDependencies>icuuc.lib;icuin.lib;icuio.lib;icutu.lib;%(AdditionalDependencies)</AdditionalDependencies>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="derb.cpp" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
\ No newline at end of file
diff --git a/intl/icu/source/tools/genrb/derb.vcxproj.filters b/intl/icu/source/tools/genrb/derb.vcxproj.filters
new file mode 100644
index 0000000000..c62d612888
--- /dev/null
+++ b/intl/icu/source/tools/genrb/derb.vcxproj.filters
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <UniqueIdentifier>{b10d3c34-0b4c-43e9-9c28-e17fdabee575}</UniqueIdentifier>
+      <Extensions>cpp;c;cxx;rc;def;r;odl;idl;hpj;bat</Extensions>
+    </Filter>
+    <Filter Include="Header Files">
+      <UniqueIdentifier>{0f0a70a2-7e7e-4e7a-88ab-b3bf739fabed}</UniqueIdentifier>
+      <Extensions>h;hpp;hxx;hm;inl</Extensions>
+    </Filter>
+    <Filter Include="Resource Files">
+      <UniqueIdentifier>{ac6d5215-57af-486d-81ed-badc17745780}</UniqueIdentifier>
+      <Extensions>ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe</Extensions>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="derb.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/intl/icu/source/tools/genrb/errmsg.c b/intl/icu/source/tools/genrb/errmsg.c
new file mode 100644
index 0000000000..a99d797ec5
--- /dev/null
+++ b/intl/icu/source/tools/genrb/errmsg.c
@@ -0,0 +1,75 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 1998-2011, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*
+* File error.c
+*
+* Modification History:
+*
+*   Date        Name        Description
+*   05/28/99    stephen     Creation.
+*******************************************************************************
+*/
+
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include "cstring.h"
+#include "errmsg.h"
+#include "toolutil.h"
+
+U_CFUNC void error(uint32_t linenumber, const char *msg, ...)
+{
+    va_list va;
+
+    va_start(va, msg);
+    fprintf(stderr, "%s:%u: ", gCurrentFileName, (int)linenumber);
+    vfprintf(stderr, msg, va);
+    fprintf(stderr, "\n");
+    va_end(va);
+}
+
+static UBool gShowWarning = true;
+
+U_CFUNC void setShowWarning(UBool val)
+{
+    gShowWarning = val;
+}
+
+U_CFUNC UBool getShowWarning(){
+    return gShowWarning;
+}
+
+static UBool gStrict =false;
+U_CFUNC UBool isStrict(){
+    return gStrict;
+}
+U_CFUNC void setStrict(UBool val){
+    gStrict = val;
+}
+static UBool gVerbose =false;
+U_CFUNC UBool isVerbose(){
+    return gVerbose;
+}
+U_CFUNC void setVerbose(UBool val){
+    gVerbose = val;
+}
+U_CFUNC void warning(uint32_t linenumber, const char *msg, ...)
+{
+    if (gShowWarning)
+    {
+        va_list va;
+
+        va_start(va, msg);
+        fprintf(stderr, "%s:%u: warning: ", gCurrentFileName, (int)linenumber);
+        vfprintf(stderr, msg, va);
+        fprintf(stderr, "\n");
+        va_end(va);
+    }
+}
diff --git a/intl/icu/source/tools/genrb/errmsg.h b/intl/icu/source/tools/genrb/errmsg.h
new file mode 100644
index 0000000000..e01b9558f0
--- /dev/null
+++ b/intl/icu/source/tools/genrb/errmsg.h
@@ -0,0 +1,46 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 1998-2016, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*
+* File error.h
+*
+* Modification History:
+*
+*   Date        Name        Description
+*   05/28/99    stephen     Creation.
+*******************************************************************************
+*/
+
+#ifndef ERROR_H
+#define ERROR_H 1
+
+#include "unicode/utypes.h"
+
+U_CDECL_BEGIN
+
+extern const char *gCurrentFileName;
+
+U_CFUNC void error(uint32_t linenumber, const char *msg, ...);
+U_CFUNC void warning(uint32_t linenumber, const char *msg, ...);
+
+/* Show warnings? */
+U_CFUNC void setShowWarning(UBool val);
+U_CFUNC UBool getShowWarning(void);
+
+/* strict */
+U_CFUNC void setStrict(UBool val);
+U_CFUNC UBool isStrict(void);
+
+/* verbosity */
+U_CFUNC void setVerbose(UBool val);
+U_CFUNC UBool isVerbose(void);
+
+U_CDECL_END
+
+#endif
diff --git a/intl/icu/source/tools/genrb/filterrb.cpp b/intl/icu/source/tools/genrb/filterrb.cpp
new file mode 100644
index 0000000000..dcc02fc621
--- /dev/null
+++ b/intl/icu/source/tools/genrb/filterrb.cpp
@@ -0,0 +1,239 @@
+// © 2018 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+
+#include <iostream>
+#include <stack>
+
+#include "filterrb.h"
+#include "errmsg.h"
+
+
+const char* PathFilter::kEInclusionNames[] = {
+    "INCLUDE",
+    "PARTIAL",
+    "EXCLUDE"
+};
+
+
+ResKeyPath::ResKeyPath() {}
+
+ResKeyPath::ResKeyPath(const std::string& path, UErrorCode& status) {
+    if (path.empty() || path[0] != '/') {
+        std::cerr << "genrb error: path must start with /: " << path << std::endl;
+        status = U_PARSE_ERROR;
+        return;
+    }
+    if (path.length() == 1) {
+        return;
+    }
+    size_t i;
+    size_t j = 0;
+    while (true) {
+        i = j + 1;
+        j = path.find('/', i);
+        std::string key = path.substr(i, j - i);
+        if (key.empty()) {
+            std::cerr << "genrb error: empty subpaths and trailing slashes are not allowed: " << path << std::endl;
+            status = U_PARSE_ERROR;
+            return;
+        }
+        push(key);
+        if (j == std::string::npos) {
+            break;
+        }
+    }
+}
+
+void ResKeyPath::push(const std::string& key) {
+    fPath.push_back(key);
+}
+
+void ResKeyPath::pop() {
+    fPath.pop_back();
+}
+
+const std::list<std::string>& ResKeyPath::pieces() const {
+    return fPath;
+}
+
+std::ostream& operator<<(std::ostream& out, const ResKeyPath& value) {
+    if (value.pieces().empty()) {
+        out << "/";
+    } else for (auto& key : value.pieces()) {
+        out << "/" << key;
+    }
+    return out;
+}
+
+
+PathFilter::~PathFilter() = default;
+
+
+void SimpleRuleBasedPathFilter::addRule(const std::string& ruleLine, UErrorCode& status) {
+    if (ruleLine.empty()) {
+        std::cerr << "genrb error: empty filter rules are not allowed" << std::endl;
+        status = U_PARSE_ERROR;
+        return;
+    }
+    bool inclusionRule = false;
+    if (ruleLine[0] == '+') {
+        inclusionRule = true;
+    } else if (ruleLine[0] != '-') {
+        std::cerr << "genrb error: rules must start with + or -: " << ruleLine << std::endl;
+        status = U_PARSE_ERROR;
+        return;
+    }
+    ResKeyPath path(ruleLine.substr(1), status);
+    addRule(path, inclusionRule, status);
+}
+
+void SimpleRuleBasedPathFilter::addRule(const ResKeyPath& path, bool inclusionRule, UErrorCode& status) {
+    if (U_FAILURE(status)) {
+        return;
+    }
+    fRoot.applyRule(path, path.pieces().begin(), inclusionRule, status);
+}
+
+PathFilter::EInclusion SimpleRuleBasedPathFilter::match(const ResKeyPath& path) const {
+    const Tree* node = &fRoot;
+
+    // defaultResult "bubbles up" the nearest "definite" inclusion/exclusion rule
+    EInclusion defaultResult = INCLUDE;
+    if (node->fIncluded != PARTIAL) {
+        // rules handled here: "+/" and "-/"
+        defaultResult = node->fIncluded;
+    }
+
+    // isLeaf is whether the filter tree can provide no additional information
+    // even if additional subpaths are added to the given key
+    bool isLeaf = false;
+
+    for (auto& key : path.pieces()) {
+        auto child = node->fChildren.find(key);
+        // Leaf case 1: input path descends outside the filter tree
+        if (child == node->fChildren.end()) {
+            if (node->fWildcard) {
+                // A wildcard pattern is present; continue checking
+                node = node->fWildcard.get();
+            } else {
+                isLeaf = true;
+                break;
+            }
+        } else {
+            node = &child->second;
+        }
+        if (node->fIncluded != PARTIAL) {
+            defaultResult = node->fIncluded;
+        }
+    }
+
+    // Leaf case 2: input path exactly matches a filter leaf
+    if (node->isLeaf()) {
+        isLeaf = true;
+    }
+
+    // Always return PARTIAL if we are not at a leaf
+    if (!isLeaf) {
+        return PARTIAL;
+    }
+
+    // If leaf node is PARTIAL, return the default
+    if (node->fIncluded == PARTIAL) {
+        return defaultResult;
+    }
+
+    return node->fIncluded;
+}
+
+
+SimpleRuleBasedPathFilter::Tree::Tree(const Tree& other)
+        : fIncluded(other.fIncluded), fChildren(other.fChildren) {
+    // Note: can't use the default copy assignment because of the std::unique_ptr
+    if (other.fWildcard) {
+        fWildcard.reset(new Tree(*other.fWildcard));
+    }
+}
+
+bool SimpleRuleBasedPathFilter::Tree::isLeaf() const {
+    return fChildren.empty() && !fWildcard;
+}
+
+void SimpleRuleBasedPathFilter::Tree::applyRule(
+        const ResKeyPath& path,
+        std::list<std::string>::const_iterator it,
+        bool inclusionRule,
+        UErrorCode& status) {
+
+    // Base Case
+    if (it == path.pieces().end()) {
+        if (isVerbose() && (fIncluded != PARTIAL || !isLeaf())) {
+            std::cout << "genrb info: rule on path " << path
+                << " overrides previous rules" << std::endl;
+        }
+        fIncluded = inclusionRule ? INCLUDE : EXCLUDE;
+        fChildren.clear();
+        fWildcard.reset();
+        return;
+    }
+
+    // Recursive Step
+    auto& key = *it;
+    if (key == "*") {
+        // Case 1: Wildcard
+        if (!fWildcard) {
+            fWildcard.reset(new Tree());
+        }
+        // Apply the rule to fWildcard and also to all existing children.
+        it++;
+        fWildcard->applyRule(path, it, inclusionRule, status);
+        for (auto& child : fChildren) {
+            child.second.applyRule(path, it, inclusionRule, status);
+        }
+        it--;
+
+    } else {
+        // Case 2: Normal Key
+        auto search = fChildren.find(key);
+        if (search == fChildren.end()) {
+            if (fWildcard) {
+                // Deep-copy the existing wildcard tree into the new key
+                search = fChildren.emplace(key, Tree(*fWildcard)).first;
+            } else {
+                search = fChildren.emplace(key, Tree()).first;
+            }
+        }
+        it++;
+        search->second.applyRule(path, it, inclusionRule, status);
+        it--;
+    }
+}
+
+void SimpleRuleBasedPathFilter::Tree::print(std::ostream& out, int32_t indent) const {
+    for (int32_t i=0; i<indent; i++) out << "\t";
+    out << "included: " << kEInclusionNames[fIncluded] << std::endl;
+    for (auto& child : fChildren) {
+        for (int32_t i=0; i<indent; i++) out << "\t";
+        out << child.first << ": {" << std::endl;
+        child.second.print(out, indent + 1);
+        for (int32_t i=0; i<indent; i++) out << "\t";
+        out << "}" << std::endl;
+    }
+    if (fWildcard) {
+        for (int32_t i=0; i<indent; i++) out << "\t";
+        out << "* {" << std::endl;
+        fWildcard->print(out, indent + 1);
+        for (int32_t i=0; i<indent; i++) out << "\t";
+        out << "}" << std::endl;
+    }
+}
+
+void SimpleRuleBasedPathFilter::print(std::ostream& out) const {
+    out << "SimpleRuleBasedPathFilter {" << std::endl;
+    fRoot.print(out, 1);
+    out << "}" << std::endl;
+}
+
+std::ostream& operator<<(std::ostream& out, const SimpleRuleBasedPathFilter& value) {
+    value.print(out);
+    return out;
+}
diff --git a/intl/icu/source/tools/genrb/filterrb.h b/intl/icu/source/tools/genrb/filterrb.h
new file mode 100644
index 0000000000..cf54766041
--- /dev/null
+++ b/intl/icu/source/tools/genrb/filterrb.h
@@ -0,0 +1,180 @@
+// © 2018 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+
+#ifndef __FILTERRB_H__
+#define __FILTERRB_H__
+
+#include <list>
+#include <map>
+#include <memory>
+#include <ostream>
+#include <string>
+
+#include "unicode/utypes.h"
+
+
+/**
+ * Represents an absolute path into a resource bundle.
+ * For example: "/units/length/meter"
+ */
+class ResKeyPath {
+public:
+    /** Constructs an empty path (top of tree) */
+    ResKeyPath();
+
+    /** Constructs from a string path */
+    ResKeyPath(const std::string& path, UErrorCode& status);
+
+    void push(const std::string& key);
+    void pop();
+
+    const std::list<std::string>& pieces() const;
+
+  private:
+    std::list<std::string> fPath;
+};
+
+std::ostream& operator<<(std::ostream& out, const ResKeyPath& value);
+
+
+/**
+ * Interface used to determine whether to include or reject pieces of a
+ * resource bundle based on their absolute path.
+ */
+class PathFilter {
+public:
+    enum EInclusion {
+        INCLUDE,
+        PARTIAL,
+        EXCLUDE
+    };
+
+    static const char* kEInclusionNames[];
+
+    virtual ~PathFilter();
+
+    /**
+     * Returns an EInclusion on whether or not the given path should be included.
+     *
+     * INCLUDE = include the whole subtree
+     * PARTIAL = recurse into the subtree
+     * EXCLUDE = reject the whole subtree
+     */
+    virtual EInclusion match(const ResKeyPath& path) const = 0;
+};
+
+
+/**
+ * Implementation of PathFilter for a list of inclusion/exclusion rules.
+ *
+ * The wildcard pattern "*" means that the subsequent filters are applied to
+ * every other tree sharing the same parent.
+ *
+ * For example, given this list of filter rules:
+ */
+//     -/alabama
+//     +/alabama/alaska/arizona
+//     -/fornia/hawaii
+//     -/mississippi
+//     +/mississippi/michigan
+//     +/mississippi/*/maine
+//     -/mississippi/*/iowa
+//     +/mississippi/louisiana/iowa
+/*
+ * You get the following structure:
+ *
+ *     SimpleRuleBasedPathFilter {
+ *       included: PARTIAL
+ *       alabama: {
+ *         included: EXCLUDE
+ *         alaska: {
+ *           included: PARTIAL
+ *           arizona: {
+ *             included: INCLUDE
+ *           }
+ *         }
+ *       }
+ *       fornia: {
+ *         included: PARTIAL
+ *         hawaii: {
+ *           included: EXCLUDE
+ *         }
+ *       }
+ *       mississippi: {
+ *         included: EXCLUDE
+ *         louisiana: {
+ *           included: PARTIAL
+ *           iowa: {
+ *             included: INCLUDE
+ *           }
+ *           maine: {
+ *             included: INCLUDE
+ *           }
+ *         }
+ *         michigan: {
+ *           included: INCLUDE
+ *           iowa: {
+ *             included: EXCLUDE
+ *           }
+ *           maine: {
+ *             included: INCLUDE
+ *           }
+ *         }
+ *         * {
+ *           included: PARTIAL
+ *           iowa: {
+ *             included: EXCLUDE
+ *           }
+ *           maine: {
+ *             included: INCLUDE
+ *           }
+ *         }
+ *       }
+ *     }
+ */
+class SimpleRuleBasedPathFilter : public PathFilter {
+public:
+    void addRule(const std::string& ruleLine, UErrorCode& status);
+    void addRule(const ResKeyPath& path, bool inclusionRule, UErrorCode& status);
+
+    EInclusion match(const ResKeyPath& path) const override;
+
+    void print(std::ostream& out) const;
+
+private:
+    struct Tree {
+
+        Tree() = default;
+
+        /** Copy constructor */
+        Tree(const Tree& other);
+
+        /**
+         * Information on the USER-SPECIFIED inclusion/exclusion.
+         *
+         * INCLUDE = this path exactly matches a "+" rule
+         * PARTIAL = this path does not match any rule, but subpaths exist
+         * EXCLUDE = this path exactly matches a "-" rule
+         */
+        EInclusion fIncluded = PARTIAL;
+        std::map<std::string, Tree> fChildren;
+        std::unique_ptr<Tree> fWildcard;
+
+        void applyRule(
+            const ResKeyPath& path,
+            std::list<std::string>::const_iterator it,
+            bool inclusionRule,
+            UErrorCode& status);
+
+        bool isLeaf() const;
+
+        void print(std::ostream& out, int32_t indent) const;
+    };
+
+    Tree fRoot;
+};
+
+std::ostream& operator<<(std::ostream& out, const SimpleRuleBasedPathFilter& value);
+
+
+#endif //__FILTERRB_H__
diff --git a/intl/icu/source/tools/genrb/genrb.1.in b/intl/icu/source/tools/genrb/genrb.1.in
new file mode 100644
index 0000000000..a457719238
--- /dev/null
+++ b/intl/icu/source/tools/genrb/genrb.1.in
@@ -0,0 +1,148 @@
+.\" Hey, Emacs! This is -*-nroff-*- you know...
+.\"
+.\" genrb.1: manual page for the genrb utility
+.\"
+.\" Copyright (C) 2016 and later: Unicode, Inc. and others.
+.\" License & terms of use: http://www.unicode.org/copyright.html
+.\" Copyright (C) 2000-2002 IBM, Inc. and others.
+.\"
+.\" Manual page by Yves Arrouye <yves@realnames.com>.
+.\"
+.TH GENRB 1 "16 April 2002" "ICU MANPAGE" "ICU @VERSION@ Manual"
+.SH NAME
+.B genrb
+\- compile a resource bundle
+.SH SYNOPSIS
+.B genrb
+[
+.BR "\-h\fP, \fB\-?\fP, \fB\-\-help"
+]
+[
+.BR "\-V\fP, \fB\-\-version"
+]
+[
+.BR "\-v\fP, \fB\-\-verbose"
+]
+[
+.BI "\-e\fP, \fB\-\-encoding" " encoding"
+]
+[
+.BI "\-j\fP, \fB\-\-write\-java" " \fR[ \fPencoding\fR ]\fP"
+]
+[
+.BI "\-s\fP, \fB\-\-sourcedir" " source"
+]
+[
+.BI "\-d\fP, \fB\-\-destdir" " destination"
+]
+[
+.BI "\-i\fP, \fB\-\-icudatadir" " directory"
+]
+.IR bundle " \.\.\."
+.SH DESCRIPTION
+.B genrb
+converts the resource
+.I bundle
+source files passed on the command line to their binary form or to
+a Java source file for use with ICU4J.
+The resulting binary files have a
+.B .res
+extension while resource bundle source files typically have a 
+.B .txt
+extension. Java source files have a
+.B java
+extension and follow the ICU4J naming conventions.
+.PP
+It is customary to name the resource bundles by their locale name,
+i.e. to use a local identifier for the
+.I bundle
+filename, e.g.
+.B ja_JP.txt
+for Japanese (Japan) data, or
+.B root.txt
+for the root bundle.
+In any case,
+.B genrb
+will produce a file whose base name is the name of the locale found
+in the resource file, not the base name of the resource file itself.
+.PP
+The binary files can be read directly by ICU, or used by
+.BR pkgdata (1)
+for incorporation into a larger archive or library.
+.SH OPTIONS
+.TP
+.BR "\-h\fP, \fB\-?\fP, \fB\-\-help"
+Print help about usage and exit.
+.TP
+.BR "\-V\fP, \fB\-\-version"
+Print the version of
+.B genrb
+and exit.
+.TP
+.BR "\-v\fP, \fB\-\-verbose"
+Display extra informative messages during execution.
+.TP
+.BI "\-e\fP, \fB\-\-encoding" " encoding"
+Set the encoding used to read input files to
+.IR encoding .
+The default encoding is the invariant (subset of ASCII or EBCDIC)
+codepage for the system (see section
+.BR "INVARIANT CHARACTERS" ).
+The encodings UTF-8, UTF-16BE, and UTF-16LE are automatically detected
+if a byte order mark (BOM) is present.
+.TP
+.BI "\-j\fP, \fB\-\-write\-java" " \fR[ \fPencoding\fR ]\fP"
+Generate a Java source code for use with ICU4J. An optional
+.I encoding
+for the Java file can be given.
+.TP
+.BI "\-s\fP, \fB\-\-sourcedir" " source"
+Set the source directory to
+.IR source .
+The default source directory is specified by the environment variable
+.BR ICU_DATA ,
+or the location set when ICU was built if 
+.B ICU_DATA
+is not set.
+.TP
+.BI "\-d\fP, \fB\-\-destdir" " destination"
+Set the destination directory to
+.IR destination .
+The default destination directory is specified by the environment variable
+.BR ICU_DATA
+or is the location set when ICU was built if 
+.B ICU_DATA
+is not set.
+.TP
+.BI "\-i\fP, \fB\-\-icudatadir" " directory"
+Look for any necessary ICU data files in
+.IR directory .
+For example, when processing collation overrides, the file
+.B ucadata.dat
+must be located.
+The default ICU data directory is specified by the environment variable
+.BR ICU_DATA .
+.SH INVARIANT CHARACTERS
+The
+.B invariant character set
+consists of the following set of characters, expressed as a standard POSIX
+regular expression:
+.BR "[a-z]|[A-Z]|[0-9]|_| |+|-|*|/" .
+This is the set which is guaranteed to be available regardless of code page.
+.SH ENVIRONMENT
+.TP 10
+.B ICU_DATA
+Specifies the directory containing ICU data. Defaults to
+.BR @thepkgicudatadir@/@PACKAGE@/@VERSION@/ .
+Some tools in ICU depend on the presence of the trailing slash. It is thus
+important to make sure that it is present if
+.B ICU_DATA
+is set.
+.SH VERSION
+@VERSION@
+.SH COPYRIGHT
+Copyright (C) 2000-2002 IBM, Inc. and others.
+.SH SEE ALSO
+.BR derb (1)
+.br
+.BR pkgdata (1)
diff --git a/intl/icu/source/tools/genrb/genrb.cpp b/intl/icu/source/tools/genrb/genrb.cpp
new file mode 100644
index 0000000000..fbf396d468
--- /dev/null
+++ b/intl/icu/source/tools/genrb/genrb.cpp
@@ -0,0 +1,869 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 1998-2016, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*
+* File genrb.cpp
+*
+* Modification History:
+*
+*   Date        Name        Description
+*   05/25/99    stephen     Creation.
+*   5/10/01     Ram         removed ustdio dependency
+*******************************************************************************
+*/
+
+#include <fstream>
+#include <iostream>
+#include <list>
+#include <string>
+
+#include <assert.h>
+#include "genrb.h"
+#include "unicode/localpointer.h"
+#include "unicode/uclean.h"
+#include "unicode/utf16.h"
+#include "charstr.h"
+#include "cmemory.h"
+#include "filterrb.h"
+#include "reslist.h"
+#include "ucmndata.h"  /* TODO: for reading the pool bundle */
+#include "collationroot.h"
+
+U_NAMESPACE_USE
+
+/* Protos */
+void  processFile(const char *filename, const char* cp,
+                  const char *inputDir, const char *outputDir, const char *filterDir,
+                  const char *packageName,
+                  SRBRoot *newPoolBundle, UBool omitBinaryCollation, UErrorCode &status);
+static char *make_res_filename(const char *filename, const char *outputDir,
+                               const char *packageName, UErrorCode &status);
+
+/* File suffixes */
+#define RES_SUFFIX ".res"
+#define COL_SUFFIX ".col"
+
+const char *gCurrentFileName = nullptr;
+#ifdef XP_MAC_CONSOLE
+#include <console.h>
+#endif
+
+void ResFile::close() {
+    delete[] fBytes;
+    fBytes = nullptr;
+    delete fStrings;
+    fStrings = nullptr;
+}
+
+enum
+{
+    HELP1,
+    HELP2,
+    VERBOSE,
+    QUIET,
+    VERSION,
+    SOURCEDIR,
+    DESTDIR,
+    ENCODING,
+    ICUDATADIR,
+    WRITE_JAVA,
+    COPYRIGHT,
+    JAVA_PACKAGE,
+    BUNDLE_NAME,
+    WRITE_XLIFF,
+    STRICT,
+    NO_BINARY_COLLATION,
+    LANGUAGE,
+    NO_COLLATION_RULES,
+    FORMAT_VERSION,
+    WRITE_POOL_BUNDLE,
+    USE_POOL_BUNDLE,
+    INCLUDE_UNIHAN_COLL,
+    FILTERDIR,
+    ICU4X_MODE,
+    UCADATA
+};
+
+UOption options[]={
+                      UOPTION_HELP_H,
+                      UOPTION_HELP_QUESTION_MARK,
+                      UOPTION_VERBOSE,
+                      UOPTION_QUIET,
+                      UOPTION_VERSION,
+                      UOPTION_SOURCEDIR,
+                      UOPTION_DESTDIR,
+                      UOPTION_ENCODING,
+                      UOPTION_ICUDATADIR,
+                      UOPTION_WRITE_JAVA,
+                      UOPTION_COPYRIGHT,
+                      UOPTION_DEF("java-package", '\x01', UOPT_REQUIRES_ARG),
+                      UOPTION_BUNDLE_NAME,
+                      UOPTION_DEF("write-xliff", 'x', UOPT_OPTIONAL_ARG),
+                      UOPTION_DEF("strict",    'k', UOPT_NO_ARG), /* 14 */
+                      UOPTION_DEF("noBinaryCollation", 'C', UOPT_NO_ARG),/* 15 */
+                      UOPTION_DEF("language",  'l', UOPT_REQUIRES_ARG), /* 16 */
+                      UOPTION_DEF("omitCollationRules", 'R', UOPT_NO_ARG),/* 17 */
+                      UOPTION_DEF("formatVersion", '\x01', UOPT_REQUIRES_ARG),/* 18 */
+                      UOPTION_DEF("writePoolBundle", '\x01', UOPT_OPTIONAL_ARG),/* 19 */
+                      UOPTION_DEF("usePoolBundle", '\x01', UOPT_OPTIONAL_ARG),/* 20 */
+                      UOPTION_DEF("includeUnihanColl", '\x01', UOPT_NO_ARG),/* 21 */ /* temporary, don't display in usage info */
+                      UOPTION_DEF("filterDir", '\x01', UOPT_OPTIONAL_ARG), /* 22 */
+                      UOPTION_DEF("icu4xMode", 'X', UOPT_NO_ARG),/* 23 */
+                      UOPTION_DEF("ucadata", '\x01', UOPT_REQUIRES_ARG),/* 24 */
+                  };
+
+static     UBool       write_java = false;
+static     UBool       write_xliff = false;
+static     const char* outputEnc ="";
+
+static ResFile poolBundle;
+
+/*added by Jing*/
+static     const char* language = nullptr;
+static     const char* xliffOutputFileName = nullptr;
+int
+main(int argc,
+     char* argv[])
+{
+    UErrorCode  status    = U_ZERO_ERROR;
+    const char *arg       = nullptr;
+    const char *outputDir = nullptr; /* nullptr = no output directory, use current */
+    const char *inputDir  = nullptr;
+    const char *filterDir = nullptr;
+    const char *encoding  = "";
+    int         i;
+    UBool illegalArg = false;
+
+    U_MAIN_INIT_ARGS(argc, argv);
+
+    options[JAVA_PACKAGE].value = "com.ibm.icu.impl.data";
+    options[BUNDLE_NAME].value = "LocaleElements";
+    argc = u_parseArgs(argc, argv, UPRV_LENGTHOF(options), options);
+
+    /* error handling, printing usage message */
+    if(argc<0) {
+        fprintf(stderr, "%s: error in command line argument \"%s\"\n", argv[0], argv[-argc]);
+        illegalArg = true;
+    } else if(argc<2) {
+        illegalArg = true;
+    }
+    if(options[WRITE_POOL_BUNDLE].doesOccur && options[USE_POOL_BUNDLE].doesOccur) {
+        fprintf(stderr, "%s: cannot combine --writePoolBundle and --usePoolBundle\n", argv[0]);
+        illegalArg = true;
+    }
+    if (options[ICU4X_MODE].doesOccur && !options[UCADATA].doesOccur) {
+        fprintf(stderr, "%s: --icu4xMode requires --ucadata\n", argv[0]);
+        illegalArg = true;
+    }
+    if(options[FORMAT_VERSION].doesOccur) {
+        const char *s = options[FORMAT_VERSION].value;
+        if(uprv_strlen(s) != 1 || (s[0] < '1' && '3' < s[0])) {
+            fprintf(stderr, "%s: unsupported --formatVersion %s\n", argv[0], s);
+            illegalArg = true;
+        } else if(s[0] == '1' &&
+                  (options[WRITE_POOL_BUNDLE].doesOccur || options[USE_POOL_BUNDLE].doesOccur)
+        ) {
+            fprintf(stderr, "%s: cannot combine --formatVersion 1 with --writePoolBundle or --usePoolBundle\n", argv[0]);
+            illegalArg = true;
+        } else {
+            setFormatVersion(s[0] - '0');
+        }
+    }
+
+    if((options[JAVA_PACKAGE].doesOccur || options[BUNDLE_NAME].doesOccur) &&
+            !options[WRITE_JAVA].doesOccur) {
+        fprintf(stderr,
+                "%s error: command line argument --java-package or --bundle-name "
+                "without --write-java\n",
+                argv[0]);
+        illegalArg = true;
+    }
+
+    if(options[VERSION].doesOccur) {
+        fprintf(stderr,
+                "%s version %s (ICU version %s).\n"
+                "%s\n",
+                argv[0], GENRB_VERSION, U_ICU_VERSION, U_COPYRIGHT_STRING);
+        if(!illegalArg) {
+            return U_ZERO_ERROR;
+        }
+    }
+
+    if(illegalArg || options[HELP1].doesOccur || options[HELP2].doesOccur) {
+        /*
+         * Broken into chunks because the C89 standard says the minimum
+         * required supported string length is 509 bytes.
+         */
+        fprintf(stderr,
+                "Usage: %s [OPTIONS] [FILES]\n"
+                "\tReads the list of resource bundle source files and creates\n"
+                "\tbinary version of resource bundles (.res files)\n",
+                argv[0]);
+        fprintf(stderr,
+                "Options:\n"
+                "\t-h or -? or --help       this usage text\n"
+                "\t-q or --quiet            do not display warnings\n"
+                "\t-v or --verbose          print extra information when processing files\n"
+                "\t-V or --version          prints out version number and exits\n"
+                "\t-c or --copyright        include copyright notice\n");
+        fprintf(stderr,
+                "\t-e or --encoding         encoding of source files\n"
+                "\t-d or --destdir          destination directory, followed by the path, defaults to '%s'\n"
+                "\t-s or --sourcedir        source directory for files followed by path, defaults to '%s'\n"
+                "\t-i or --icudatadir       directory for locating any needed intermediate data files,\n"
+                "\t                         followed by path, defaults to '%s'\n",
+                u_getDataDirectory(), u_getDataDirectory(), u_getDataDirectory());
+        fprintf(stderr,
+                "\t-j or --write-java       write a Java ListResourceBundle for ICU4J, followed by optional encoding\n"
+                "\t                         defaults to ASCII and \\uXXXX format.\n"
+                "\t      --java-package     For --write-java: package name for writing the ListResourceBundle,\n"
+                "\t                         defaults to com.ibm.icu.impl.data\n");
+        fprintf(stderr,
+                "\t-b or --bundle-name      For --write-java: root resource bundle name for writing the ListResourceBundle,\n"
+                "\t                         defaults to LocaleElements\n"
+                "\t-x or --write-xliff      write an XLIFF file for the resource bundle. Followed by\n"
+                "\t                         an optional output file name.\n"
+                "\t-k or --strict           use pedantic parsing of syntax\n"
+                /*added by Jing*/
+                "\t-l or --language         for XLIFF: language code compliant with BCP 47.\n");
+        fprintf(stderr,
+                "\t-C or --noBinaryCollation  do not generate binary collation image;\n"
+                "\t                           makes .res file smaller but collator instantiation much slower;\n"
+                "\t                           maintains ability to get tailoring rules\n"
+                "\t-R or --omitCollationRules do not include collation (tailoring) rules;\n"
+                "\t                           makes .res file smaller and maintains collator instantiation speed\n"
+                "\t                           but tailoring rules will not be available (they are rarely used)\n");
+        fprintf(stderr,
+                "\t      --formatVersion      write a .res file compatible with the requested formatVersion (single digit);\n"
+                "\t                           for example, --formatVersion 1\n");
+        fprintf(stderr,
+                "\t      --writePoolBundle [directory]  write a pool.res file with all of the keys of all input bundles\n"
+                "\t      --usePoolBundle [directory]  point to keys from the pool.res keys pool bundle if they are available there;\n"
+                "\t                           makes .res files smaller but dependent on the pool bundle\n"
+                "\t                           (--writePoolBundle and --usePoolBundle cannot be combined)\n");
+        fprintf(stderr,
+                "\t      --filterDir          Input directory where filter files are available.\n"
+                "\t                           For more on filter files, see ICU Data Build Tool.\n");
+
+        return illegalArg ? U_ILLEGAL_ARGUMENT_ERROR : U_ZERO_ERROR;
+    }
+
+    if(options[VERBOSE].doesOccur) {
+        setVerbose(true);
+    }
+
+    if(options[QUIET].doesOccur) {
+        setShowWarning(false);
+    }
+    if(options[STRICT].doesOccur) {
+        setStrict(true);
+    }
+    if(options[COPYRIGHT].doesOccur){
+        setIncludeCopyright(true);
+    }
+
+    if(options[SOURCEDIR].doesOccur) {
+        inputDir = options[SOURCEDIR].value;
+    }
+
+    if(options[DESTDIR].doesOccur) {
+        outputDir = options[DESTDIR].value;
+    }
+
+    if (options[FILTERDIR].doesOccur) {
+        filterDir = options[FILTERDIR].value;
+    }
+
+    if(options[ENCODING].doesOccur) {
+        encoding = options[ENCODING].value;
+    }
+
+    if(options[ICUDATADIR].doesOccur) {
+        u_setDataDirectory(options[ICUDATADIR].value);
+    }
+    /* Initialize ICU */
+    u_init(&status);
+    if (U_FAILURE(status) && status != U_FILE_ACCESS_ERROR) {
+        /* Note: u_init() will try to open ICU property data.
+         *       failures here are expected when building ICU from scratch.
+         *       ignore them.
+        */
+        fprintf(stderr, "%s: can not initialize ICU.  status = %s\n",
+            argv[0], u_errorName(status));
+        exit(1);
+    }
+    status = U_ZERO_ERROR;
+    if(options[WRITE_JAVA].doesOccur) {
+        write_java = true;
+        outputEnc = options[WRITE_JAVA].value;
+    }
+
+    if(options[WRITE_XLIFF].doesOccur) {
+        write_xliff = true;
+        if(options[WRITE_XLIFF].value != nullptr){
+            xliffOutputFileName = options[WRITE_XLIFF].value;
+        }
+    }
+
+    if (options[UCADATA].doesOccur) {
+#if !UCONFIG_NO_COLLATION
+        CollationRoot::forceLoadFromFile(options[UCADATA].value, status);
+#else
+        fprintf(stderr, "--ucadata was used with UCONFIG_NO_COLLATION\n");
+        return status;
+#endif
+    }
+
+    initParser();
+
+    /*added by Jing*/
+    if(options[LANGUAGE].doesOccur) {
+        language = options[LANGUAGE].value;
+    }
+
+    LocalPointer<SRBRoot> newPoolBundle;
+    if(options[WRITE_POOL_BUNDLE].doesOccur) {
+        newPoolBundle.adoptInsteadAndCheckErrorCode(new SRBRoot(nullptr, true, status), status);
+        if(U_FAILURE(status)) {
+            fprintf(stderr, "unable to create an empty bundle for the pool keys: %s\n", u_errorName(status));
+            return status;
+        } else {
+            const char *poolResName = "pool.res";
+            char *nameWithoutSuffix = static_cast<char *>(uprv_malloc(uprv_strlen(poolResName) + 1));
+            if (nameWithoutSuffix == nullptr) {
+                fprintf(stderr, "out of memory error\n");
+                return U_MEMORY_ALLOCATION_ERROR;
+            }
+            uprv_strcpy(nameWithoutSuffix, poolResName);
+            *uprv_strrchr(nameWithoutSuffix, '.') = 0;
+            newPoolBundle->fLocale = nameWithoutSuffix;
+        }
+    }
+
+    if(options[USE_POOL_BUNDLE].doesOccur) {
+        const char *poolResName = "pool.res";
+        FileStream *poolFile;
+        int32_t poolFileSize;
+        int32_t indexLength;
+        /*
+         * TODO: Consolidate inputDir/filename handling from main() and processFile()
+         * into a common function, and use it here as well.
+         * Try to create toolutil functions for dealing with dir/filenames and
+         * loading ICU data files without udata_open().
+         * Share code with icupkg?
+         * Also, make_res_filename() seems to be unused. Review and remove.
+         */
+        CharString poolFileName;
+        if (options[USE_POOL_BUNDLE].value!=nullptr) {
+            poolFileName.append(options[USE_POOL_BUNDLE].value, status);
+        } else if (inputDir) {
+            poolFileName.append(inputDir, status);
+        }
+        poolFileName.appendPathPart(poolResName, status);
+        if (U_FAILURE(status)) {
+            return status;
+        }
+        poolFile = T_FileStream_open(poolFileName.data(), "rb");
+        if (poolFile == nullptr) {
+            fprintf(stderr, "unable to open pool bundle file %s\n", poolFileName.data());
+            return 1;
+        }
+        poolFileSize = T_FileStream_size(poolFile);
+        if (poolFileSize < 32) {
+            fprintf(stderr, "the pool bundle file %s is too small\n", poolFileName.data());
+            return 1;
+        }
+        poolBundle.fBytes = new uint8_t[(poolFileSize + 15) & ~15];
+        if (poolFileSize > 0 && poolBundle.fBytes == nullptr) {
+            fprintf(stderr, "unable to allocate memory for the pool bundle file %s\n", poolFileName.data());
+            return U_MEMORY_ALLOCATION_ERROR;
+        }
+
+        UDataSwapper *ds;
+        const DataHeader *header;
+        int32_t bytesRead = T_FileStream_read(poolFile, poolBundle.fBytes, poolFileSize);
+        if (bytesRead != poolFileSize) {
+            fprintf(stderr, "unable to read the pool bundle file %s\n", poolFileName.data());
+            return 1;
+        }
+        /*
+         * Swap the pool bundle so that a single checked-in file can be used.
+         * The swapper functions also test that the data looks like
+         * a well-formed .res file.
+         */
+        ds = udata_openSwapperForInputData(poolBundle.fBytes, bytesRead,
+                                           U_IS_BIG_ENDIAN, U_CHARSET_FAMILY, &status);
+        if (U_FAILURE(status)) {
+            fprintf(stderr, "udata_openSwapperForInputData(pool bundle %s) failed: %s\n",
+                    poolFileName.data(), u_errorName(status));
+            return status;
+        }
+        ures_swap(ds, poolBundle.fBytes, bytesRead, poolBundle.fBytes, &status);
+        udata_closeSwapper(ds);
+        if (U_FAILURE(status)) {
+            fprintf(stderr, "ures_swap(pool bundle %s) failed: %s\n",
+                    poolFileName.data(), u_errorName(status));
+            return status;
+        }
+        header = (const DataHeader *)poolBundle.fBytes;
+        if (header->info.formatVersion[0] < 2) {
+            fprintf(stderr, "invalid format of pool bundle file %s\n", poolFileName.data());
+            return U_INVALID_FORMAT_ERROR;
+        }
+        const int32_t *pRoot = (const int32_t *)(
+                (const char *)header + header->dataHeader.headerSize);
+        poolBundle.fIndexes = pRoot + 1;
+        indexLength = poolBundle.fIndexes[URES_INDEX_LENGTH] & 0xff;
+        if (indexLength <= URES_INDEX_POOL_CHECKSUM) {
+            fprintf(stderr, "insufficient indexes[] in pool bundle file %s\n", poolFileName.data());
+            return U_INVALID_FORMAT_ERROR;
+        }
+        int32_t keysBottom = 1 + indexLength;
+        int32_t keysTop = poolBundle.fIndexes[URES_INDEX_KEYS_TOP];
+        poolBundle.fKeys = (const char *)(pRoot + keysBottom);
+        poolBundle.fKeysLength = (keysTop - keysBottom) * 4;
+        poolBundle.fChecksum = poolBundle.fIndexes[URES_INDEX_POOL_CHECKSUM];
+
+        for (i = 0; i < poolBundle.fKeysLength; ++i) {
+            if (poolBundle.fKeys[i] == 0) {
+                ++poolBundle.fKeysCount;
+            }
+        }
+
+        // 16BitUnits[] begins with strings-v2.
+        // The strings-v2 may optionally be terminated by what looks like
+        // an explicit string length that exceeds the number of remaining 16-bit units.
+        int32_t stringUnitsLength = (poolBundle.fIndexes[URES_INDEX_16BIT_TOP] - keysTop) * 2;
+        if (stringUnitsLength >= 2 && getFormatVersion() >= 3) {
+            poolBundle.fStrings = new PseudoListResource(nullptr, status);
+            if (poolBundle.fStrings == nullptr) {
+                fprintf(stderr, "unable to allocate memory for the pool bundle strings %s\n",
+                        poolFileName.data());
+                return U_MEMORY_ALLOCATION_ERROR;
+            }
+            // The PseudoListResource constructor call did not allocate further memory.
+            assert(U_SUCCESS(status));
+            const char16_t *p = (const char16_t *)(pRoot + keysTop);
+            int32_t remaining = stringUnitsLength;
+            do {
+                int32_t first = *p;
+                int8_t numCharsForLength;
+                int32_t length;
+                if (!U16_IS_TRAIL(first)) {
+                    // NUL-terminated
+                    numCharsForLength = 0;
+                    for (length = 0;
+                         length < remaining && p[length] != 0;
+                         ++length) {}
+                } else if (first < 0xdfef) {
+                    numCharsForLength = 1;
+                    length = first & 0x3ff;
+                } else if (first < 0xdfff && remaining >= 2) {
+                    numCharsForLength = 2;
+                    length = ((first - 0xdfef) << 16) | p[1];
+                } else if (first == 0xdfff && remaining >= 3) {
+                    numCharsForLength = 3;
+                    length = ((int32_t)p[1] << 16) | p[2];
+                } else {
+                    break;  // overrun
+                }
+                // Check for overrun before changing remaining,
+                // so that it is always accurate after the loop body.
+                if ((numCharsForLength + length) >= remaining ||
+                        p[numCharsForLength + length] != 0) {
+                    break;  // overrun or explicitly terminated
+                }
+                int32_t poolStringIndex = stringUnitsLength - remaining;
+                // Maximum pool string index when suffix-sharing the last character.
+                int32_t maxStringIndex = poolStringIndex + numCharsForLength + length - 1;
+                if (maxStringIndex >= RES_MAX_OFFSET) {
+                    // pool string index overrun
+                    break;
+                }
+                p += numCharsForLength;
+                remaining -= numCharsForLength;
+                if (length != 0) {
+                    StringResource *sr =
+                            new StringResource(poolStringIndex, numCharsForLength,
+                                               p, length, status);
+                    if (sr == nullptr) {
+                        fprintf(stderr, "unable to allocate memory for a pool bundle string %s\n",
+                                poolFileName.data());
+                        return U_MEMORY_ALLOCATION_ERROR;
+                    }
+                    poolBundle.fStrings->add(sr);
+                    poolBundle.fStringIndexLimit = maxStringIndex + 1;
+                    // The StringResource constructor did not allocate further memory.
+                    assert(U_SUCCESS(status));
+                }
+                p += length + 1;
+                remaining -= length + 1;
+            } while (remaining > 0);
+            if (poolBundle.fStrings->fCount == 0) {
+                delete poolBundle.fStrings;
+                poolBundle.fStrings = nullptr;
+            }
+        }
+
+        T_FileStream_close(poolFile);
+        setUsePoolBundle(true);
+        if (isVerbose() && poolBundle.fStrings != nullptr) {
+            printf("number of shared strings: %d\n", (int)poolBundle.fStrings->fCount);
+            int32_t length = poolBundle.fStringIndexLimit + 1;  // incl. last NUL
+            printf("16-bit units for strings: %6d = %6d bytes\n",
+                   (int)length, (int)length * 2);
+        }
+    }
+
+    if(!options[FORMAT_VERSION].doesOccur && getFormatVersion() == 3 &&
+            poolBundle.fStrings == nullptr &&
+            !options[WRITE_POOL_BUNDLE].doesOccur) {
+        // If we just default to formatVersion 3
+        // but there are no pool bundle strings to share
+        // and we do not write a pool bundle,
+        // then write formatVersion 2 which is just as good.
+        setFormatVersion(2);
+    }
+
+    if(options[INCLUDE_UNIHAN_COLL].doesOccur) {
+        puts("genrb option --includeUnihanColl ignored: \n"
+                "CLDR 26/ICU 54 unihan data is small, except\n"
+                "the ucadata-unihan.icu version of the collation root data\n"
+                "is about 300kB larger than the ucadata-implicithan.icu version.");
+    }
+
+    if((argc-1)!=1) {
+        printf("genrb number of files: %d\n", argc - 1);
+    }
+    /* generate the binary files */
+    for(i = 1; i < argc; ++i) {
+        status = U_ZERO_ERROR;
+        arg    = getLongPathname(argv[i]);
+
+        CharString theCurrentFileName;
+        if (inputDir) {
+            theCurrentFileName.append(inputDir, status);
+        }
+        theCurrentFileName.appendPathPart(arg, status);
+        if (U_FAILURE(status)) {
+            break;
+        }
+
+        gCurrentFileName = theCurrentFileName.data();
+        if (isVerbose()) {
+            printf("Processing file \"%s\"\n", theCurrentFileName.data());
+        }
+        processFile(arg, encoding, inputDir, outputDir, filterDir, nullptr,
+                    newPoolBundle.getAlias(),
+                    options[NO_BINARY_COLLATION].doesOccur, status);
+    }
+
+    poolBundle.close();
+
+    if(U_SUCCESS(status) && options[WRITE_POOL_BUNDLE].doesOccur) {
+        const char* writePoolDir;
+        if (options[WRITE_POOL_BUNDLE].value!=nullptr) {
+            writePoolDir = options[WRITE_POOL_BUNDLE].value;
+        } else {
+            writePoolDir = outputDir;
+        }
+        char outputFileName[256];
+        newPoolBundle->write(writePoolDir, nullptr, outputFileName, sizeof(outputFileName), status);
+        if(U_FAILURE(status)) {
+            fprintf(stderr, "unable to write the pool bundle: %s\n", u_errorName(status));
+        }
+    }
+
+    u_cleanup();
+
+    /* Don't return warnings as a failure */
+    if (U_SUCCESS(status)) {
+        return 0;
+    }
+
+    return status;
+}
+
+/* Process a file */
+void
+processFile(const char *filename, const char *cp,
+            const char *inputDir, const char *outputDir, const char *filterDir,
+            const char *packageName,
+            SRBRoot *newPoolBundle,
+            UBool omitBinaryCollation, UErrorCode &status) {
+    LocalPointer<SRBRoot> data;
+    LocalUCHARBUFPointer ucbuf;
+    CharString openFileName;
+    CharString inputDirBuf;
+
+    char outputFileName[256];
+    int32_t dirlen  = 0;
+
+    if (U_FAILURE(status)) {
+        return;
+    }
+    if(filename==nullptr){
+        status=U_ILLEGAL_ARGUMENT_ERROR;
+        return;
+    }
+
+    if(inputDir == nullptr) {
+        const char *filenameBegin = uprv_strrchr(filename, U_FILE_SEP_CHAR);
+        if (filenameBegin != nullptr) {
+            /*
+             * When a filename ../../../data/root.txt is specified,
+             * we presume that the input directory is ../../../data
+             * This is very important when the resource file includes
+             * another file, like UCARules.txt or thaidict.brk.
+             */
+            int32_t filenameSize = (int32_t)(filenameBegin - filename + 1);
+            inputDirBuf.append(filename, filenameSize, status);
+
+            inputDir = inputDirBuf.data();
+            dirlen  = inputDirBuf.length();
+        }
+    }else{
+        dirlen  = (int32_t)uprv_strlen(inputDir);
+
+        if(inputDir[dirlen-1] != U_FILE_SEP_CHAR) {
+            /*
+             * append the input dir to openFileName if the first char in
+             * filename is not file separation char and the last char input directory is  not '.'.
+             * This is to support :
+             * genrb -s. /home/icu/data
+             * genrb -s. icu/data
+             * The user cannot mix notations like
+             * genrb -s. /icu/data --- the absolute path specified. -s redundant
+             * user should use
+             * genrb -s. icu/data  --- start from CWD and look in icu/data dir
+             */
+            if( (filename[0] != U_FILE_SEP_CHAR) && (inputDir[dirlen-1] !='.')){
+                openFileName.append(inputDir, status);
+            }
+        } else {
+            openFileName.append(inputDir, status);
+        }
+    }
+    openFileName.appendPathPart(filename, status);
+
+    // Test for CharString failure
+    if (U_FAILURE(status)) {
+        return;
+    }
+
+    ucbuf.adoptInstead(ucbuf_open(openFileName.data(), &cp,getShowWarning(),true, &status));
+    if(status == U_FILE_ACCESS_ERROR) {
+
+        fprintf(stderr, "couldn't open file %s\n", openFileName.data());
+        return;
+    }
+    if (ucbuf.isNull() || U_FAILURE(status)) {
+        fprintf(stderr, "An error occurred processing file %s. Error: %s\n",
+                openFileName.data(), u_errorName(status));
+        return;
+    }
+    /* auto detected popular encodings? */
+    if (cp!=nullptr && isVerbose()) {
+        printf("autodetected encoding %s\n", cp);
+    }
+    /* Parse the data into an SRBRoot */
+    data.adoptInstead(parse(ucbuf.getAlias(), inputDir, outputDir, filename,
+            !omitBinaryCollation, options[NO_COLLATION_RULES].doesOccur, options[ICU4X_MODE].doesOccur, &status));
+
+    if (data.isNull() || U_FAILURE(status)) {
+        fprintf(stderr, "couldn't parse the file %s. Error:%s\n", filename, u_errorName(status));
+        return;
+    }
+
+    // Run filtering before writing pool bundle
+    if (filterDir != nullptr) {
+        CharString filterFileName(filterDir, status);
+        filterFileName.appendPathPart(filename, status);
+        if (U_FAILURE(status)) {
+            return;
+        }
+
+        // Open the file and read it into filter
+        SimpleRuleBasedPathFilter filter;
+        std::ifstream f(filterFileName.data());
+        if (f.fail()) {
+            std::cerr << "genrb error: unable to open " << filterFileName.data() << std::endl;
+            status = U_FILE_ACCESS_ERROR;
+            return;
+        }
+        std::string currentLine;
+        while (std::getline(f, currentLine)) {
+            // Ignore # comments and empty lines
+            if (currentLine.empty() || currentLine[0] == '#') {
+                continue;
+            }
+            filter.addRule(currentLine, status);
+            if (U_FAILURE(status)) {
+                return;
+            }
+        }
+
+        if (isVerbose()) {
+            filter.print(std::cout);
+        }
+
+        // Apply the filter to the data
+        ResKeyPath path;
+        data->fRoot->applyFilter(filter, path, data.getAlias());
+    }
+
+    if(options[WRITE_POOL_BUNDLE].doesOccur) {
+        data->fWritePoolBundle = newPoolBundle;
+        data->compactKeys(status);
+        int32_t newKeysLength;
+        const char *newKeys = data->getKeyBytes(&newKeysLength);
+        newPoolBundle->addKeyBytes(newKeys, newKeysLength, status);
+        if(U_FAILURE(status)) {
+            fprintf(stderr, "bundle_compactKeys(%s) or bundle_getKeyBytes() failed: %s\n",
+                    filename, u_errorName(status));
+            return;
+        }
+        /* count the number of just-added key strings */
+        for(const char *newKeysLimit = newKeys + newKeysLength; newKeys < newKeysLimit; ++newKeys) {
+            if(*newKeys == 0) {
+                ++newPoolBundle->fKeysCount;
+            }
+        }
+    }
+
+    if(options[USE_POOL_BUNDLE].doesOccur) {
+        data->fUsePoolBundle = &poolBundle;
+    }
+
+    /* Determine the target rb filename */
+    uprv_free(make_res_filename(filename, outputDir, packageName, status));
+    if(U_FAILURE(status)) {
+        fprintf(stderr, "couldn't make the res fileName for  bundle %s. Error:%s\n",
+                filename, u_errorName(status));
+        return;
+    }
+    if(write_java== true){
+        bundle_write_java(data.getAlias(), outputDir, outputEnc,
+                          outputFileName, sizeof(outputFileName),
+                          options[JAVA_PACKAGE].value, options[BUNDLE_NAME].value, &status);
+    }else if(write_xliff ==true){
+        bundle_write_xml(data.getAlias(), outputDir, outputEnc,
+                         filename, outputFileName, sizeof(outputFileName),
+                         language, xliffOutputFileName, &status);
+    }else{
+        /* Write the data to the file */
+        data->write(outputDir, packageName, outputFileName, sizeof(outputFileName), status);
+    }
+    if (U_FAILURE(status)) {
+        fprintf(stderr, "couldn't write bundle %s. Error:%s\n", outputFileName, u_errorName(status));
+    }
+}
+
+/* Generate the target .res file name from the input file name */
+static char*
+make_res_filename(const char *filename,
+                  const char *outputDir,
+                  const char *packageName,
+                  UErrorCode &status) {
+    char *basename;
+    char *dirname;
+    char *resName;
+
+    int32_t pkgLen = 0; /* length of package prefix */
+
+
+    if (U_FAILURE(status)) {
+        return 0;
+    }
+
+    if(packageName != nullptr)
+    {
+        pkgLen = (int32_t)(1 + uprv_strlen(packageName));
+    }
+
+    /* setup */
+    basename = dirname = resName = 0;
+
+    /* determine basename, and compiled file names */
+    basename = (char*) uprv_malloc(sizeof(char) * (uprv_strlen(filename) + 1));
+    if(basename == 0) {
+        status = U_MEMORY_ALLOCATION_ERROR;
+        goto finish;
+    }
+
+    get_basename(basename, filename);
+
+    dirname = (char*) uprv_malloc(sizeof(char) * (uprv_strlen(filename) + 1));
+    if(dirname == 0) {
+        status = U_MEMORY_ALLOCATION_ERROR;
+        goto finish;
+    }
+
+    get_dirname(dirname, filename);
+
+    if (outputDir == nullptr) {
+        /* output in same dir as .txt */
+        resName = (char*) uprv_malloc(sizeof(char) * (uprv_strlen(dirname)
+                                      + pkgLen
+                                      + uprv_strlen(basename)
+                                      + uprv_strlen(RES_SUFFIX) + 8));
+        if(resName == 0) {
+            status = U_MEMORY_ALLOCATION_ERROR;
+            goto finish;
+        }
+
+        uprv_strcpy(resName, dirname);
+
+        if(packageName != nullptr)
+        {
+            uprv_strcat(resName, packageName);
+            uprv_strcat(resName, "_");
+        }
+
+        uprv_strcat(resName, basename);
+
+    } else {
+        int32_t dirlen      = (int32_t)uprv_strlen(outputDir);
+        int32_t basenamelen = (int32_t)uprv_strlen(basename);
+
+        resName = (char*) uprv_malloc(sizeof(char) * (dirlen + pkgLen + basenamelen + 8));
+
+        if (resName == nullptr) {
+            status = U_MEMORY_ALLOCATION_ERROR;
+            goto finish;
+        }
+
+        uprv_strcpy(resName, outputDir);
+
+        if(outputDir[dirlen] != U_FILE_SEP_CHAR) {
+            resName[dirlen]     = U_FILE_SEP_CHAR;
+            resName[dirlen + 1] = '\0';
+        }
+
+        if(packageName != nullptr)
+        {
+            uprv_strcat(resName, packageName);
+            uprv_strcat(resName, "_");
+        }
+
+        uprv_strcat(resName, basename);
+    }
+
+finish:
+    uprv_free(basename);
+    uprv_free(dirname);
+
+    return resName;
+}
+
+/*
+ * Local Variables:
+ * indent-tabs-mode: nil
+ * End:
+ */
diff --git a/intl/icu/source/tools/genrb/genrb.h b/intl/icu/source/tools/genrb/genrb.h
new file mode 100644
index 0000000000..019020a34a
--- /dev/null
+++ b/intl/icu/source/tools/genrb/genrb.h
@@ -0,0 +1,52 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 2002-2015, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*
+* File genrb.h
+*/
+
+#ifndef GENRB_H
+#define GENRB_H
+
+#include <stdio.h>
+#include "unicode/utypes.h"
+#include "unicode/putil.h"
+#include "cmemory.h"
+#include "cstring.h"
+#include "filestrm.h"
+
+
+#include "ucbuf.h"
+#include "errmsg.h"
+#include "parse.h"
+#include "rbutil.h"
+
+#include "toolutil.h"
+#include "uoptions.h"
+
+#include "unicode/ucol.h"
+#include "unicode/uloc.h"
+
+/* The version of genrb */
+#define GENRB_VERSION "56"
+
+U_CDECL_BEGIN
+
+U_CAPI void processFile(
+    const char *filename,
+    const char* cp,
+    const char *inputDir,
+    const char *outputDir,
+    const char *packageName,
+    UBool omitBinaryCollation,
+    UErrorCode *status);
+
+U_CDECL_END
+
+#endif
diff --git a/intl/icu/source/tools/genrb/genrb.vcxproj b/intl/icu/source/tools/genrb/genrb.vcxproj
new file mode 100644
index 0000000000..66651c11d0
--- /dev/null
+++ b/intl/icu/source/tools/genrb/genrb.vcxproj
@@ -0,0 +1,113 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{97521D06-EC47-45D4-8BD0-9E16B3F93B2A}</ProjectGuid>
+  </PropertyGroup>
+  <PropertyGroup Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseOfMfc>false</UseOfMfc>
+    <CharacterSet>MultiByte</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <!-- The following import will include the 'default' configuration options for VS projects. -->
+  <Import Project="..\..\allinone\Build.Windows.ProjectConfiguration.props" />
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup>
+    <_ProjectFileVersion>10.0.30319.1</_ProjectFileVersion>
+    <OutDir>.\$(Platform)\$(Configuration)\</OutDir>
+    <IntDir>.\$(Platform)\$(Configuration)\</IntDir>
+    <!-- The ICU projects use "Win32" to mean "x86", so we need to special case it. -->
+    <OutDir Condition="'$(Platform)'=='Win32'">.\x86\$(Configuration)\</OutDir>
+    <IntDir Condition="'$(Platform)'=='Win32'">.\x86\$(Configuration)\</IntDir>
+    <!-- Disable Incremental Linking for Release builds as it prevents Link-time Code Generation -->
+    <LinkIncremental Condition="'$(Configuration)'=='Debug'">true</LinkIncremental>
+    <LinkIncremental Condition="'$(Configuration)'=='Release'">false</LinkIncremental>
+  </PropertyGroup>
+  <!-- Options that are common to *all* configurations -->
+  <ItemDefinitionGroup>
+    <Midl>
+      <TypeLibraryName>$(OutDir)/genrb.tlb</TypeLibraryName>
+    </Midl>
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <CompileAs>Default</CompileAs>
+      <DisableLanguageExtensions>true</DisableLanguageExtensions>
+      <AdditionalIncludeDirectories>..\..\..\include;..\..\common;..\toolutil;..\..\i18n;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PrecompiledHeaderOutputFile>$(OutDir)/genrb.pch</PrecompiledHeaderOutputFile>
+      <AssemblerListingLocation>$(OutDir)/</AssemblerListingLocation>
+      <ObjectFileName>$(OutDir)/</ObjectFileName>
+      <ProgramDataBaseFileName>$(OutDir)/genrb.pdb</ProgramDataBaseFileName>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <OutputFile>$(OutDir)/genrb.exe</OutputFile>
+      <AdditionalLibraryDirectories>..\..\..\$(IcuLibOutputDir);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+    </Link>
+    <CustomBuildStep>
+      <Command>copy "$(TargetPath)" ..\..\..\$(IcuBinOutputDir)</Command>
+      <Outputs>..\..\..\$(IcuBinOutputDir)\$(TargetFileName);%(Outputs)</Outputs>
+    </CustomBuildStep>
+  </ItemDefinitionGroup>
+  <!-- Options that are common to all 'Debug' project configurations -->
+  <ItemDefinitionGroup Condition="'$(Configuration)'=='Debug'">
+    <ClCompile>
+      <BrowseInformation>true</BrowseInformation>
+      <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
+    </ClCompile>
+    <Link>
+      <AdditionalDependencies>icuucd.lib;icuind.lib;icutud.lib;%(AdditionalDependencies)</AdditionalDependencies>
+    </Link>
+  </ItemDefinitionGroup>
+  <!-- Options that are common to all 'Release' project configurations -->
+  <ItemDefinitionGroup Condition="'$(Configuration)'=='Release'">
+    <ClCompile>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+    </ClCompile>
+    <Link>
+      <AdditionalDependencies>icuuc.lib;icuin.lib;icutu.lib;%(AdditionalDependencies)</AdditionalDependencies>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="errmsg.c" />
+    <ClCompile Include="filterrb.cpp" />
+    <ClCompile Include="genrb.cpp" />
+    <ClCompile Include="parse.cpp">
+      <DisableLanguageExtensions>false</DisableLanguageExtensions>
+    </ClCompile>
+    <ClCompile Include="prscmnts.cpp">
+      <DisableLanguageExtensions>false</DisableLanguageExtensions>
+    </ClCompile>
+    <ClCompile Include="rbutil.c" />
+    <ClCompile Include="read.c" />
+    <ClCompile Include="reslist.cpp">
+      <DisableLanguageExtensions>false</DisableLanguageExtensions>
+    </ClCompile>
+    <ClCompile Include="rle.c" />
+    <ClCompile Include="ustr.c" />
+    <ClCompile Include="wrtjava.cpp">
+      <DisableLanguageExtensions>false</DisableLanguageExtensions>
+    </ClCompile>
+    <ClCompile Include="wrtxml.cpp">
+      <DisableLanguageExtensions>false</DisableLanguageExtensions>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="errmsg.h" />
+    <ClInclude Include="genrb.h" />
+    <ClInclude Include="filterrb.h" />
+    <ClInclude Include="parse.h" />
+    <ClInclude Include="prscmnts.h" />
+    <ClInclude Include="rbutil.h" />
+    <ClInclude Include="read.h" />
+    <ClInclude Include="reslist.h" />
+    <ClInclude Include="rle.h" />
+    <ClInclude Include="ustr.h" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
\ No newline at end of file
diff --git a/intl/icu/source/tools/genrb/genrb.vcxproj.filters b/intl/icu/source/tools/genrb/genrb.vcxproj.filters
new file mode 100644
index 0000000000..1f2f5b3b8c
--- /dev/null
+++ b/intl/icu/source/tools/genrb/genrb.vcxproj.filters
@@ -0,0 +1,87 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <UniqueIdentifier>{2dee2c2f-25a5-43f0-985f-de4ba26925b4}</UniqueIdentifier>
+      <Extensions>cpp;c;cxx;rc;def;r;odl;idl;hpj;bat</Extensions>
+    </Filter>
+    <Filter Include="Header Files">
+      <UniqueIdentifier>{7156c811-7116-4eef-8bb1-0400c51f9fd3}</UniqueIdentifier>
+      <Extensions>h;hpp;hxx;hm;inl</Extensions>
+    </Filter>
+    <Filter Include="Resource Files">
+      <UniqueIdentifier>{df647868-56cc-475d-a3f6-1d1f50aa5e4f}</UniqueIdentifier>
+      <Extensions>ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe</Extensions>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="errmsg.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="filterrb.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="genrb.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="parse.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="prscmnts.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="rbutil.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="read.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="reslist.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="rle.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="ustr.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="wrtjava.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="wrtxml.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="errmsg.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="filterrb.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="genrb.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="parse.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="prscmnts.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="rbutil.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="read.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="reslist.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="rle.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="ustr.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/intl/icu/source/tools/genrb/parse.cpp b/intl/icu/source/tools/genrb/parse.cpp
new file mode 100644
index 0000000000..1e82bda6e5
--- /dev/null
+++ b/intl/icu/source/tools/genrb/parse.cpp
@@ -0,0 +1,2435 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 1998-2015, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*
+* File parse.cpp
+*
+* Modification History:
+*
+*   Date          Name          Description
+*   05/26/99     stephen       Creation.
+*   02/25/00     weiv          Overhaul to write udata
+*   5/10/01      Ram           removed ustdio dependency
+*   06/10/2001  Dominic Ludlam <dom@recoil.org> Rewritten
+*******************************************************************************
+*/
+
+// Safer use of UnicodeString.
+#include <cstdint>
+#include "unicode/umachine.h"
+#ifndef UNISTR_FROM_CHAR_EXPLICIT
+#   define UNISTR_FROM_CHAR_EXPLICIT explicit
+#endif
+
+// Less important, but still a good idea.
+#ifndef UNISTR_FROM_STRING_EXPLICIT
+#   define UNISTR_FROM_STRING_EXPLICIT explicit
+#endif
+
+#include <assert.h>
+#include "parse.h"
+#include "errmsg.h"
+#include "uhash.h"
+#include "cmemory.h"
+#include "cstring.h"
+#include "uinvchar.h"
+#include "read.h"
+#include "ustr.h"
+#include "reslist.h"
+#include "rbt_pars.h"
+#include "genrb.h"
+#include "unicode/normalizer2.h"
+#include "unicode/stringpiece.h"
+#include "unicode/unistr.h"
+#include "unicode/ustring.h"
+#include "unicode/uscript.h"
+#include "unicode/utf16.h"
+#include "unicode/putil.h"
+#include "charstr.h"
+#include "collationbuilder.h"
+#include "collationdata.h"
+#include "collationdatareader.h"
+#include "collationdatawriter.h"
+#include "collationfastlatinbuilder.h"
+#include "collationinfo.h"
+#include "collationroot.h"
+#include "collationruleparser.h"
+#include "collationtailoring.h"
+#include <stdio.h>
+#include "writesrc.h"
+
+/* Number of tokens to read ahead of the current stream position */
+#define MAX_LOOKAHEAD   3
+
+#define CR               0x000D
+#define LF               0x000A
+#define SPACE            0x0020
+#define TAB              0x0009
+#define ESCAPE           0x005C
+#define HASH             0x0023
+#define QUOTE            0x0027
+#define ZERO             0x0030
+#define STARTCOMMAND     0x005B
+#define ENDCOMMAND       0x005D
+#define OPENSQBRACKET    0x005B
+#define CLOSESQBRACKET   0x005D
+
+#define ICU4X_DIACRITIC_BASE  0x0300
+#define ICU4X_DIACRITIC_LIMIT 0x034F
+
+using icu::CharString;
+using icu::LocalMemory;
+using icu::LocalPointer;
+using icu::LocalUCHARBUFPointer;
+using icu::StringPiece;
+using icu::UnicodeString;
+
+struct Lookahead
+{
+     enum   ETokenType type;
+     struct UString    value;
+     struct UString    comment;
+     uint32_t          line;
+};
+
+/* keep in sync with token defines in read.h */
+const char *tokenNames[TOK_TOKEN_COUNT] =
+{
+     "string",             /* A string token, such as "MonthNames" */
+     "'{'",                 /* An opening brace character */
+     "'}'",                 /* A closing brace character */
+     "','",                 /* A comma */
+     "':'",                 /* A colon */
+
+     "<end of file>",     /* End of the file has been reached successfully */
+     "<end of line>"
+};
+
+/* Just to store "TRUE" */
+//static const char16_t trueValue[] = {0x0054, 0x0052, 0x0055, 0x0045, 0x0000};
+
+typedef struct {
+    struct Lookahead  lookahead[MAX_LOOKAHEAD + 1];
+    uint32_t          lookaheadPosition;
+    UCHARBUF         *buffer;
+    struct SRBRoot *bundle;
+    const char     *inputdir;
+    uint32_t        inputdirLength;
+    const char     *outputdir;
+    uint32_t        outputdirLength;
+    const char     *filename;
+    UBool           makeBinaryCollation;
+    UBool           omitCollationRules;
+    UBool           icu4xMode;
+} ParseState;
+
+typedef struct SResource *
+ParseResourceFunction(ParseState* state, char *tag, uint32_t startline, const struct UString* comment, UErrorCode *status);
+
+static struct SResource *parseResource(ParseState* state, char *tag, const struct UString *comment, UErrorCode *status);
+
+/* The nature of the lookahead buffer:
+   There are MAX_LOOKAHEAD + 1 slots, used as a circular buffer.  This provides
+   MAX_LOOKAHEAD lookahead tokens and a slot for the current token and value.
+   When getToken is called, the current pointer is moved to the next slot and the
+   old slot is filled with the next token from the reader by calling getNextToken.
+   The token values are stored in the slot, which means that token values don't
+   survive a call to getToken, ie.
+
+   UString *value;
+
+   getToken(&value, nullptr, status);
+   getToken(nullptr,   nullptr, status);       bad - value is now a different string
+*/
+static void
+initLookahead(ParseState* state, UCHARBUF *buf, UErrorCode *status)
+{
+    static uint32_t initTypeStrings = 0;
+    uint32_t i;
+
+    if (!initTypeStrings)
+    {
+        initTypeStrings = 1;
+    }
+
+    state->lookaheadPosition   = 0;
+    state->buffer              = buf;
+
+    resetLineNumber();
+
+    for (i = 0; i < MAX_LOOKAHEAD; i++)
+    {
+        state->lookahead[i].type = getNextToken(state->buffer, &state->lookahead[i].value, &state->lookahead[i].line, &state->lookahead[i].comment, status);
+        if (U_FAILURE(*status))
+        {
+            return;
+        }
+    }
+
+    *status = U_ZERO_ERROR;
+}
+
+static void
+cleanupLookahead(ParseState* state)
+{
+    uint32_t i;
+    for (i = 0; i <= MAX_LOOKAHEAD; i++)
+    {
+        ustr_deinit(&state->lookahead[i].value);
+        ustr_deinit(&state->lookahead[i].comment);
+    }
+
+}
+
+static enum ETokenType
+getToken(ParseState* state, struct UString **tokenValue, struct UString* comment, uint32_t *linenumber, UErrorCode *status)
+{
+    enum ETokenType result;
+    uint32_t          i;
+
+    result = state->lookahead[state->lookaheadPosition].type;
+
+    if (tokenValue != nullptr)
+    {
+        *tokenValue = &state->lookahead[state->lookaheadPosition].value;
+    }
+
+    if (linenumber != nullptr)
+    {
+        *linenumber = state->lookahead[state->lookaheadPosition].line;
+    }
+
+    if (comment != nullptr)
+    {
+        ustr_cpy(comment, &(state->lookahead[state->lookaheadPosition].comment), status);
+    }
+
+    i = (state->lookaheadPosition + MAX_LOOKAHEAD) % (MAX_LOOKAHEAD + 1);
+    state->lookaheadPosition = (state->lookaheadPosition + 1) % (MAX_LOOKAHEAD + 1);
+    ustr_setlen(&state->lookahead[i].comment, 0, status);
+    ustr_setlen(&state->lookahead[i].value, 0, status);
+    state->lookahead[i].type = getNextToken(state->buffer, &state->lookahead[i].value, &state->lookahead[i].line, &state->lookahead[i].comment, status);
+
+    /* printf("getToken, returning %s\n", tokenNames[result]); */
+
+    return result;
+}
+
+static enum ETokenType
+peekToken(ParseState* state, uint32_t lookaheadCount, struct UString **tokenValue, uint32_t *linenumber, struct UString *comment, UErrorCode *status)
+{
+    uint32_t i = (state->lookaheadPosition + lookaheadCount) % (MAX_LOOKAHEAD + 1);
+
+    if (U_FAILURE(*status))
+    {
+        return TOK_ERROR;
+    }
+
+    if (lookaheadCount >= MAX_LOOKAHEAD)
+    {
+        *status = U_INTERNAL_PROGRAM_ERROR;
+        return TOK_ERROR;
+    }
+
+    if (tokenValue != nullptr)
+    {
+        *tokenValue = &state->lookahead[i].value;
+    }
+
+    if (linenumber != nullptr)
+    {
+        *linenumber = state->lookahead[i].line;
+    }
+
+    if(comment != nullptr){
+        ustr_cpy(comment, &(state->lookahead[state->lookaheadPosition].comment), status);
+    }
+
+    return state->lookahead[i].type;
+}
+
+static void
+expect(ParseState* state, enum ETokenType expectedToken, struct UString **tokenValue, struct UString *comment, uint32_t *linenumber, UErrorCode *status)
+{
+    uint32_t        line;
+
+    enum ETokenType token = getToken(state, tokenValue, comment, &line, status);
+
+    if (linenumber != nullptr)
+    {
+        *linenumber = line;
+    }
+
+    if (U_FAILURE(*status))
+    {
+        return;
+    }
+
+    if (token != expectedToken)
+    {
+        *status = U_INVALID_FORMAT_ERROR;
+        error(line, "expecting %s, got %s", tokenNames[expectedToken], tokenNames[token]);
+    }
+    else
+    {
+        *status = U_ZERO_ERROR;
+    }
+}
+
+static char *getInvariantString(ParseState* state, uint32_t *line, struct UString *comment,
+                                int32_t &stringLength, UErrorCode *status)
+{
+    struct UString *tokenValue;
+    char           *result;
+
+    expect(state, TOK_STRING, &tokenValue, comment, line, status);
+
+    if (U_FAILURE(*status))
+    {
+        return nullptr;
+    }
+
+    if(!uprv_isInvariantUString(tokenValue->fChars, tokenValue->fLength)) {
+        *status = U_INVALID_FORMAT_ERROR;
+        error(*line, "invariant characters required for table keys, binary data, etc.");
+        return nullptr;
+    }
+
+    result = static_cast<char *>(uprv_malloc(tokenValue->fLength+1));
+
+    if (result == nullptr)
+    {
+        *status = U_MEMORY_ALLOCATION_ERROR;
+        return nullptr;
+    }
+
+    u_UCharsToChars(tokenValue->fChars, result, tokenValue->fLength+1);
+    stringLength = tokenValue->fLength;
+    return result;
+}
+
+static struct SResource *
+parseUCARules(ParseState* state, char *tag, uint32_t startline, const struct UString* /*comment*/, UErrorCode *status)
+{
+    struct SResource *result = nullptr;
+    struct UString   *tokenValue;
+    FileStream       *file          = nullptr;
+    char              filename[256] = { '\0' };
+    char              cs[128]       = { '\0' };
+    uint32_t          line;
+    UBool quoted = false;
+    UCHARBUF *ucbuf=nullptr;
+    UChar32   c     = 0;
+    const char* cp  = nullptr;
+    char16_t *pTarget     = nullptr;
+    char16_t *target      = nullptr;
+    char16_t *targetLimit = nullptr;
+    int32_t size = 0;
+
+    expect(state, TOK_STRING, &tokenValue, nullptr, &line, status);
+
+    if(isVerbose()){
+        printf(" %s at line %i \n",  (tag == nullptr) ? "(null)" : tag, (int)startline);
+    }
+
+    if (U_FAILURE(*status))
+    {
+        return nullptr;
+    }
+    /* make the filename including the directory */
+    if (state->inputdir != nullptr)
+    {
+        uprv_strcat(filename, state->inputdir);
+
+        if (state->inputdir[state->inputdirLength - 1] != U_FILE_SEP_CHAR)
+        {
+            uprv_strcat(filename, U_FILE_SEP_STRING);
+        }
+    }
+
+    u_UCharsToChars(tokenValue->fChars, cs, tokenValue->fLength);
+
+    expect(state, TOK_CLOSE_BRACE, nullptr, nullptr, nullptr, status);
+
+    if (U_FAILURE(*status))
+    {
+        return nullptr;
+    }
+    uprv_strcat(filename, cs);
+
+    if(state->omitCollationRules) {
+        return res_none();
+    }
+
+    ucbuf = ucbuf_open(filename, &cp, getShowWarning(),false, status);
+
+    if (U_FAILURE(*status)) {
+        error(line, "An error occurred while opening the input file %s\n", filename);
+        return nullptr;
+    }
+
+    /* We allocate more space than actually required
+    * since the actual size needed for storing UChars
+    * is not known in UTF-8 byte stream
+    */
+    size        = ucbuf_size(ucbuf) + 1;
+    pTarget     = (char16_t*) uprv_malloc(U_SIZEOF_UCHAR * size);
+    uprv_memset(pTarget, 0, size*U_SIZEOF_UCHAR);
+    target      = pTarget;
+    targetLimit = pTarget+size;
+
+    /* read the rules into the buffer */
+    while (target < targetLimit)
+    {
+        c = ucbuf_getc(ucbuf, status);
+        if(c == QUOTE) {
+            quoted = (UBool)!quoted;
+        }
+        /* weiv (06/26/2002): adding the following:
+         * - preserving spaces in commands [...]
+         * - # comments until the end of line
+         */
+        if (c == STARTCOMMAND && !quoted)
+        {
+            /* preserve commands
+             * closing bracket will be handled by the
+             * append at the end of the loop
+             */
+            while(c != ENDCOMMAND) {
+                U_APPEND_CHAR32_ONLY(c, target);
+                c = ucbuf_getc(ucbuf, status);
+            }
+        }
+        else if (c == HASH && !quoted) {
+            /* skip comments */
+            while(c != CR && c != LF) {
+                c = ucbuf_getc(ucbuf, status);
+            }
+            continue;
+        }
+        else if (c == ESCAPE)
+        {
+            c = unescape(ucbuf, status);
+
+            if (c == (UChar32)U_ERR)
+            {
+                uprv_free(pTarget);
+                T_FileStream_close(file);
+                return nullptr;
+            }
+        }
+        else if (!quoted && (c == SPACE || c == TAB || c == CR || c == LF))
+        {
+            /* ignore spaces carriage returns
+            * and line feed unless in the form \uXXXX
+            */
+            continue;
+        }
+
+        /* Append char16_t * after dissembling if c > 0xffff*/
+        if (c != (UChar32)U_EOF)
+        {
+            U_APPEND_CHAR32_ONLY(c, target);
+        }
+        else
+        {
+            break;
+        }
+    }
+
+    /* terminate the string */
+    if(target < targetLimit){
+        *target = 0x0000;
+    }
+
+    result = string_open(state->bundle, tag, pTarget, (int32_t)(target - pTarget), nullptr, status);
+
+
+    ucbuf_close(ucbuf);
+    uprv_free(pTarget);
+    T_FileStream_close(file);
+
+    return result;
+}
+
+static struct SResource *
+parseTransliterator(ParseState* state, char *tag, uint32_t startline, const struct UString* /*comment*/, UErrorCode *status)
+{
+    struct SResource *result = nullptr;
+    struct UString   *tokenValue;
+    FileStream       *file          = nullptr;
+    char              filename[256] = { '\0' };
+    char              cs[128]       = { '\0' };
+    uint32_t          line;
+    UCHARBUF *ucbuf=nullptr;
+    const char* cp  = nullptr;
+    char16_t *pTarget     = nullptr;
+    const char16_t *pSource     = nullptr;
+    int32_t size = 0;
+
+    expect(state, TOK_STRING, &tokenValue, nullptr, &line, status);
+
+    if(isVerbose()){
+        printf(" %s at line %i \n",  (tag == nullptr) ? "(null)" : tag, (int)startline);
+    }
+
+    if (U_FAILURE(*status))
+    {
+        return nullptr;
+    }
+    /* make the filename including the directory */
+    if (state->inputdir != nullptr)
+    {
+        uprv_strcat(filename, state->inputdir);
+
+        if (state->inputdir[state->inputdirLength - 1] != U_FILE_SEP_CHAR)
+        {
+            uprv_strcat(filename, U_FILE_SEP_STRING);
+        }
+    }
+
+    u_UCharsToChars(tokenValue->fChars, cs, tokenValue->fLength);
+
+    expect(state, TOK_CLOSE_BRACE, nullptr, nullptr, nullptr, status);
+
+    if (U_FAILURE(*status))
+    {
+        return nullptr;
+    }
+    uprv_strcat(filename, cs);
+
+
+    ucbuf = ucbuf_open(filename, &cp, getShowWarning(),false, status);
+
+    if (U_FAILURE(*status)) {
+        error(line, "An error occurred while opening the input file %s\n", filename);
+        return nullptr;
+    }
+
+    /* We allocate more space than actually required
+    * since the actual size needed for storing UChars
+    * is not known in UTF-8 byte stream
+    */
+    pSource = ucbuf_getBuffer(ucbuf, &size, status);
+    pTarget     = (char16_t*) uprv_malloc(U_SIZEOF_UCHAR * (size + 1));
+    uprv_memset(pTarget, 0, size*U_SIZEOF_UCHAR);
+
+#if !UCONFIG_NO_TRANSLITERATION
+    size = utrans_stripRules(pSource, size, pTarget, status);
+#else
+    size = 0;
+    fprintf(stderr, " Warning: writing empty transliteration data ( UCONFIG_NO_TRANSLITERATION ) \n");
+#endif
+    result = string_open(state->bundle, tag, pTarget, size, nullptr, status);
+
+    ucbuf_close(ucbuf);
+    uprv_free(pTarget);
+    T_FileStream_close(file);
+
+    return result;
+}
+static ArrayResource* dependencyArray = nullptr;
+
+static struct SResource *
+parseDependency(ParseState* state, char *tag, uint32_t startline, const struct UString* comment, UErrorCode *status)
+{
+    struct SResource *result = nullptr;
+    struct SResource *elem = nullptr;
+    struct UString   *tokenValue;
+    uint32_t          line;
+    char              filename[256] = { '\0' };
+    char              cs[128]       = { '\0' };
+
+    expect(state, TOK_STRING, &tokenValue, nullptr, &line, status);
+
+    if(isVerbose()){
+        printf(" %s at line %i \n",  (tag == nullptr) ? "(null)" : tag, (int)startline);
+    }
+
+    if (U_FAILURE(*status))
+    {
+        return nullptr;
+    }
+    /* make the filename including the directory */
+    if (state->outputdir != nullptr)
+    {
+        uprv_strcat(filename, state->outputdir);
+
+        if (state->outputdir[state->outputdirLength - 1] != U_FILE_SEP_CHAR)
+        {
+            uprv_strcat(filename, U_FILE_SEP_STRING);
+        }
+    }
+
+    u_UCharsToChars(tokenValue->fChars, cs, tokenValue->fLength);
+
+    if (U_FAILURE(*status))
+    {
+        return nullptr;
+    }
+    uprv_strcat(filename, cs);
+    if(!T_FileStream_file_exists(filename)){
+        if(isStrict()){
+            error(line, "The dependency file %s does not exist. Please make sure it exists.\n",filename);
+        }else{
+            warning(line, "The dependency file %s does not exist. Please make sure it exists.\n",filename);
+        }
+    }
+    if(dependencyArray==nullptr){
+        dependencyArray = array_open(state->bundle, "%%DEPENDENCY", nullptr, status);
+    }
+    if(tag!=nullptr){
+        result = string_open(state->bundle, tag, tokenValue->fChars, tokenValue->fLength, comment, status);
+    }
+    elem = string_open(state->bundle, nullptr, tokenValue->fChars, tokenValue->fLength, comment, status);
+
+    dependencyArray->add(elem);
+
+    if (U_FAILURE(*status))
+    {
+        return nullptr;
+    }
+    expect(state, TOK_CLOSE_BRACE, nullptr, nullptr, nullptr, status);
+    return result;
+}
+static struct SResource *
+parseString(ParseState* state, char *tag, uint32_t startline, const struct UString* comment, UErrorCode *status)
+{
+    struct UString   *tokenValue;
+    struct SResource *result = nullptr;
+
+/*    if (tag != nullptr && uprv_strcmp(tag, "%%UCARULES") == 0)
+    {
+        return parseUCARules(tag, startline, status);
+    }*/
+    if(isVerbose()){
+        printf(" string %s at line %i \n",  (tag == nullptr) ? "(null)" : tag, (int)startline);
+    }
+    expect(state, TOK_STRING, &tokenValue, nullptr, nullptr, status);
+
+    if (U_SUCCESS(*status))
+    {
+        /* create the string now - tokenValue doesn't survive a call to getToken (and therefore
+        doesn't survive expect either) */
+
+        result = string_open(state->bundle, tag, tokenValue->fChars, tokenValue->fLength, comment, status);
+        if(U_SUCCESS(*status) && result) {
+            expect(state, TOK_CLOSE_BRACE, nullptr, nullptr, nullptr, status);
+
+            if (U_FAILURE(*status))
+            {
+                res_close(result);
+                return nullptr;
+            }
+        }
+    }
+
+    return result;
+}
+
+static struct SResource *
+parseAlias(ParseState* state, char *tag, uint32_t startline, const struct UString *comment, UErrorCode *status)
+{
+    struct UString   *tokenValue;
+    struct SResource *result  = nullptr;
+
+    expect(state, TOK_STRING, &tokenValue, nullptr, nullptr, status);
+
+    if(isVerbose()){
+        printf(" alias %s at line %i \n",  (tag == nullptr) ? "(null)" : tag, (int)startline);
+    }
+
+    if (U_SUCCESS(*status))
+    {
+        /* create the string now - tokenValue doesn't survive a call to getToken (and therefore
+        doesn't survive expect either) */
+
+        result = alias_open(state->bundle, tag, tokenValue->fChars, tokenValue->fLength, comment, status);
+
+        expect(state, TOK_CLOSE_BRACE, nullptr, nullptr, nullptr, status);
+
+        if (U_FAILURE(*status))
+        {
+            res_close(result);
+            return nullptr;
+        }
+    }
+
+    return result;
+}
+
+#if !UCONFIG_NO_COLLATION
+
+namespace {
+
+static struct SResource* resLookup(struct SResource* res, const char* key){
+    if (res == res_none() || !res->isTable()) {
+        return nullptr;
+    }
+
+    TableResource *list = static_cast<TableResource *>(res);
+    SResource *current = list->fFirst;
+    while (current != nullptr) {
+        if (uprv_strcmp(((list->fRoot->fKeys) + (current->fKey)), key) == 0) {
+            return current;
+        }
+        current = current->fNext;
+    }
+    return nullptr;
+}
+
+class GenrbImporter : public icu::CollationRuleParser::Importer {
+public:
+    GenrbImporter(const char *in, const char *out) : inputDir(in), outputDir(out) {}
+    virtual ~GenrbImporter();
+    virtual void getRules(
+            const char *localeID, const char *collationType,
+            UnicodeString &rules,
+            const char *&errorReason, UErrorCode &errorCode) override;
+
+private:
+    const char *inputDir;
+    const char *outputDir;
+};
+
+GenrbImporter::~GenrbImporter() {}
+
+void
+GenrbImporter::getRules(
+        const char *localeID, const char *collationType,
+        UnicodeString &rules,
+        const char *& /*errorReason*/, UErrorCode &errorCode) {
+    CharString filename(localeID, errorCode);
+    for(int32_t i = 0; i < filename.length(); i++){
+        if(filename[i] == '-'){
+            filename.data()[i] = '_';
+        }
+    }
+    filename.append(".txt", errorCode);
+    if (U_FAILURE(errorCode)) {
+        return;
+    }
+    CharString inputDirBuf;
+    CharString openFileName;
+    if(inputDir == nullptr) {
+        const char *filenameBegin = uprv_strrchr(filename.data(), U_FILE_SEP_CHAR);
+        if (filenameBegin != nullptr) {
+            /*
+             * When a filename ../../../data/root.txt is specified,
+             * we presume that the input directory is ../../../data
+             * This is very important when the resource file includes
+             * another file, like UCARules.txt or thaidict.brk.
+             */
+            StringPiece dir = filename.toStringPiece();
+            const char *filenameLimit = filename.data() + filename.length();
+            dir.remove_suffix((int32_t)(filenameLimit - filenameBegin));
+            inputDirBuf.append(dir, errorCode);
+            inputDir = inputDirBuf.data();
+        }
+    }else{
+        int32_t dirlen  = (int32_t)uprv_strlen(inputDir);
+
+        if((filename[0] != U_FILE_SEP_CHAR) && (inputDir[dirlen-1] !='.')) {
+            /*
+             * append the input dir to openFileName if the first char in
+             * filename is not file separator char and the last char input directory is  not '.'.
+             * This is to support :
+             * genrb -s. /home/icu/data
+             * genrb -s. icu/data
+             * The user cannot mix notations like
+             * genrb -s. /icu/data --- the absolute path specified. -s redundant
+             * user should use
+             * genrb -s. icu/data  --- start from CWD and look in icu/data dir
+             */
+            openFileName.append(inputDir, dirlen, errorCode);
+            if(inputDir[dirlen-1] != U_FILE_SEP_CHAR) {
+                openFileName.append(U_FILE_SEP_CHAR, errorCode);
+            }
+        }
+    }
+    openFileName.append(filename, errorCode);
+    if(U_FAILURE(errorCode)) {
+        return;
+    }
+    // printf("GenrbImporter::getRules(%s, %s) reads %s\n", localeID, collationType, openFileName.data());
+    const char* cp = "";
+    LocalUCHARBUFPointer ucbuf(
+            ucbuf_open(openFileName.data(), &cp, getShowWarning(), true, &errorCode));
+    if(errorCode == U_FILE_ACCESS_ERROR) {
+        fprintf(stderr, "couldn't open file %s\n", openFileName.data());
+        return;
+    }
+    if (ucbuf.isNull() || U_FAILURE(errorCode)) {
+        fprintf(stderr, "An error occurred processing file %s. Error: %s\n", openFileName.data(), u_errorName(errorCode));
+        return;
+    }
+
+    /* Parse the data into an SRBRoot */
+    LocalPointer<SRBRoot> data(
+            parse(ucbuf.getAlias(), inputDir, outputDir, filename.data(), false, false, false, &errorCode));
+    if (U_FAILURE(errorCode)) {
+        return;
+    }
+
+    struct SResource *root = data->fRoot;
+    struct SResource *collations = resLookup(root, "collations");
+    if (collations != nullptr) {
+      struct SResource *collation = resLookup(collations, collationType);
+      if (collation != nullptr) {
+        struct SResource *sequence = resLookup(collation, "Sequence");
+        if (sequence != nullptr && sequence->isString()) {
+          // No string pointer aliasing so that we need not hold onto the resource bundle.
+          StringResource *sr = static_cast<StringResource *>(sequence);
+          rules = sr->fString;
+        }
+      }
+    }
+}
+
+// Quick-and-dirty escaping function.
+// Assumes that we are on an ASCII-based platform.
+static void
+escape(const char16_t *s, char *buffer, size_t n) {
+    int32_t length = u_strlen(s);
+    int32_t i = 0;
+    for (;;) {
+        UChar32 c;
+        U16_NEXT(s, i, length, c);
+        if (c == 0) {
+            *buffer = 0;
+            return;
+        } else if (0x20 <= c && c <= 0x7e) {
+            // printable ASCII
+            *buffer++ = (char)c;  // assumes ASCII-based platform
+        } else {
+            buffer += snprintf(buffer, n, "\\u%04X", (int)c);
+        }
+    }
+}
+
+}  // namespace
+
+static FILE*
+openTOML(const char* outputdir, const char* name, const char* collationType, const char* structType, UErrorCode *status) {
+    CharString baseName;
+    baseName.append(name, *status);
+    baseName.append("_", *status);
+    baseName.append(collationType, *status);
+    baseName.append("_", *status);
+    baseName.append(structType, *status);
+
+    CharString outFileName;
+    if (outputdir && *outputdir) {
+        outFileName.append(outputdir, *status).ensureEndsWithFileSeparator(*status);
+    }
+    outFileName.append(baseName, *status);
+    outFileName.append(".toml", *status);
+    if (U_FAILURE(*status)) {
+        return nullptr;
+    }
+
+    FILE* f = fopen(outFileName.data(), "w");
+    if (!f) {
+        *status = U_FILE_ACCESS_ERROR;
+        return nullptr;
+    }
+    usrc_writeFileNameGeneratedBy(f, "#", baseName.data(), "genrb -X");
+
+    return f;
+}
+
+static void
+writeCollationMetadataTOML(const char* outputdir, const char* name, const char* collationType, const uint32_t metadataBits, UErrorCode *status) {
+    FILE* f = openTOML(outputdir, name, collationType, "meta", status);
+    if (!f) {
+        return;
+    }
+    // printf("writeCollationMetadataTOML %s %s\n", name, collationType);
+    fprintf(f, "bits = 0x%X\n", metadataBits);
+    fclose(f);
+}
+
+static UChar32
+writeCollationDiacriticsTOML(const char* outputdir, const char* name, const char* collationType, const icu::CollationData* data, UErrorCode *status) {
+    UChar32 limit = ICU4X_DIACRITIC_LIMIT;
+    FILE* f = openTOML(outputdir, name, collationType, "dia", status);
+    if (!f) {
+        return limit;
+    }
+    // printf("writeCollationDiacriticsTOML %s %s\n", name, collationType);
+    uint16_t secondaries[ICU4X_DIACRITIC_LIMIT-ICU4X_DIACRITIC_BASE];
+    for (UChar32 c = ICU4X_DIACRITIC_BASE; c < ICU4X_DIACRITIC_LIMIT; ++c) {
+        uint16_t secondary = 0;
+        uint32_t ce32 = data->getCE32(c);
+        if (ce32 == icu::Collation::FALLBACK_CE32) {
+            ce32 = data->base->getCE32(c);
+        }
+        if (c == 0x0340 || c == 0x0341 || c == 0x0343 || c == 0x0344) {
+            // These never occur in NFD data
+        } else if (!icu::Collation::isSimpleOrLongCE32(ce32)) {
+            if (uprv_strcmp(name, "root") == 0) {
+                printf("UNSUPPORTED DIACRITIC CE32 in root: TAG: %X CE32: %X char: %X\n", icu::Collation::tagFromCE32(ce32), ce32, c);
+                fclose(f);
+                *status = U_INTERNAL_PROGRAM_ERROR;
+                return limit;
+            }
+            limit = c;
+            break;
+        } else {
+            uint64_t ce = uint64_t(icu::Collation::ceFromCE32(ce32));
+            if ((ce & 0xFFFFFFFF0000FFFF) != uint64_t(icu::Collation::COMMON_TERTIARY_CE)) {
+                // Not a CE where only the secondary weight differs from the expected
+                // pattern.
+                limit = c;
+                break;
+            }
+            secondary = uint16_t(ce >> 16);
+        }
+        secondaries[c - ICU4X_DIACRITIC_BASE] = secondary;
+
+    }
+    usrc_writeArray(f, "secondaries = [\n  ", secondaries, 16, limit-ICU4X_DIACRITIC_BASE, "  ", "\n]\n");
+    fclose(f);
+    return limit;
+}
+
+static void
+writeCollationReorderingTOML(const char* outputdir, const char* name, const char* collationType, const icu::CollationSettings* settings, UErrorCode *status) {
+    FILE* f = openTOML(outputdir, name, collationType, "reord", status);
+    if (!f) {
+        return;
+    }
+    // printf("writeCollationReorderingTOML %s %s\n", name, collationType);
+    fprintf(f, "min_high_no_reorder = 0x%X\n", settings->minHighNoReorder);
+    usrc_writeArray(f, "reorder_table = [\n  ", settings->reorderTable, 8, 256, "  ", "\n]\n");
+    usrc_writeArray(f, "reorder_ranges = [\n  ", settings->reorderRanges, 32, settings->reorderRangesLength, "  ", "\n]\n");
+    fclose(f);
+}
+
+
+static void
+writeCollationJamoTOML(const char* outputdir, const char* name, const char* collationType, const icu::CollationData* data, UErrorCode *status) {
+    FILE* f = openTOML(outputdir, name, collationType, "jamo", status);
+    if (!f) {
+        printf("writeCollationJamoTOML FAILED TO OPEN FILE %s %s\n", name, collationType);
+        return;
+    }
+    uint32_t jamo[0x1200-0x1100];
+    for (UChar32 c = 0x1100; c < 0x1200; ++c) {
+        uint32_t ce32 = data->getCE32(c);
+        if (ce32 == icu::Collation::FALLBACK_CE32) {
+            ce32 = data->base->getCE32(c);
+        }
+        // Can't reject complex CE32s, because search collations have expansions.
+        // These expansions refer to the tailoring, which foils the reuse of the
+        // these jamo tables.
+        // XXX Figure out what to do. Perhaps instead of having Latin mini expansions,
+        // there should be Hangul mini expansions.
+        // XXX in any case, validate that modern jamo are self-contained.
+        jamo[c - 0x1100] = ce32;
+
+    }
+    usrc_writeArray(f, "ce32s = [\n  ", jamo, 32, 0x1200-0x1100, "  ", "\n]\n");
+    fclose(f);
+}
+
+static UBool
+convertTrie(const void *context, UChar32 start, UChar32 end, uint32_t value) {
+    if (start >= 0x1100 && start < 0x1200 && end >= 0x1100 && end < 0x1200) {
+        // Range entirely in conjoining jamo block.
+        return true;
+    }
+    icu::IcuToolErrorCode status("genrb: convertTrie");
+    umutablecptrie_setRange((UMutableCPTrie*)context, start, end, value, status);
+    return !U_FAILURE(*status);
+}
+
+static void
+writeCollationDataTOML(const char* outputdir, const char* name, const char* collationType, const icu::CollationData* data, UBool root, UChar32 diacriticLimit, UErrorCode *status) {
+    FILE* f = openTOML(outputdir, name, collationType, "data", status);
+    if (!f) {
+        return;
+    }
+    // printf("writeCollationDataTOML %s %s\n", name, collationType);
+
+    icu::UnicodeSet tailoringSet;
+
+    if (data->base) {
+        tailoringSet.addAll(*(data->unsafeBackwardSet));
+        tailoringSet.removeAll(*(data->base->unsafeBackwardSet));
+    } else {
+        tailoringSet.addAll(*(data->unsafeBackwardSet));
+    }
+
+    // Use the same value for out-of-range and default in the hope of not having to allocate
+    // different blocks, since ICU4X never does out-of-range queries.
+    uint32_t trieDefault = root ? icu::Collation::UNASSIGNED_CE32 : icu::Collation::FALLBACK_CE32;
+    icu::LocalUMutableCPTriePointer builder(umutablecptrie_open(trieDefault, trieDefault, status));
+
+    utrie2_enum(data->trie, nullptr, &convertTrie, builder.getAlias());
+
+    // If the diacritic table was cut short, copy CE32s between the lowered
+    // limit and the max limit from the root to the tailoring. As of June 2022,
+    // no collation in CLDR needs this.
+    for (UChar32 c = diacriticLimit; c < ICU4X_DIACRITIC_LIMIT; ++c) {
+        if (c == 0x0340 || c == 0x0341 || c == 0x0343 || c == 0x0344) {
+            // These never occur in NFD data.
+            continue;
+        }
+        uint32_t ce32 = data->getCE32(c);
+        if (ce32 == icu::Collation::FALLBACK_CE32) {
+            ce32 = data->base->getCE32(c);
+            umutablecptrie_set(builder.getAlias(), c, ce32, status);
+        }
+    }
+
+    // Ensure that the range covered by the diacritic table isn't duplicated
+    // in the trie.
+    for (UChar32 c = ICU4X_DIACRITIC_BASE; c < diacriticLimit; ++c) {
+        if (umutablecptrie_get(builder.getAlias(), c) != trieDefault) {
+            umutablecptrie_set(builder.getAlias(), c, trieDefault, status);
+        }
+    }
+
+    icu::LocalUCPTriePointer utrie(umutablecptrie_buildImmutable(
+    builder.getAlias(),
+    UCPTRIE_TYPE_SMALL,
+    UCPTRIE_VALUE_BITS_32,
+    status));
+    usrc_writeArray(f, "contexts = [\n  ", data->contexts, 16, data->contextsLength, "  ", "\n]\n");
+    usrc_writeArray(f, "ce32s = [\n  ", data->ce32s, 32, data->ce32sLength, "  ", "\n]\n");
+    usrc_writeArray(f, "ces = [\n  ", data->ces, 64, data->cesLength, "  ", "\n]\n");
+    fprintf(f, "[trie]\n");
+    usrc_writeUCPTrie(f, "trie", utrie.getAlias(), UPRV_TARGET_SYNTAX_TOML);
+
+    fclose(f);
+}
+
+static void
+writeCollationSpecialPrimariesTOML(const char* outputdir, const char* name, const char* collationType, const icu::CollationData* data, UErrorCode *status) {
+    FILE* f = openTOML(outputdir, name, collationType, "prim", status);
+    if (!f) {
+        return;
+    }
+    // printf("writeCollationSpecialPrimariesTOML %s %s\n", name, collationType);
+
+    uint16_t lastPrimaries[4];
+    for (int32_t i = 0; i < 4; ++i) {
+        // getLastPrimaryForGroup subtracts one from a 16-bit value, so we add one
+        // back to get a value that fits in 16 bits.
+        lastPrimaries[i] = (uint16_t)((data->getLastPrimaryForGroup(UCOL_REORDER_CODE_FIRST + i) + 1) >> 16);
+    }
+
+    uint32_t numericPrimary = data->numericPrimary;
+    if (numericPrimary & 0xFFFFFF) {
+        printf("Lower 24 bits set in numeric primary");
+        *status = U_INTERNAL_PROGRAM_ERROR;
+        return;
+    }
+
+    usrc_writeArray(f, "last_primaries = [\n  ", lastPrimaries, 16, 4, "  ", "\n]\n");
+    fprintf(f, "numeric_primary = 0x%X\n", numericPrimary >> 24);
+    fclose(f);
+}
+
+static void
+writeCollationTOML(const char* outputdir, const char* name, const char* collationType, const icu::CollationData* data, const icu::CollationSettings* settings, UErrorCode *status) {
+    UBool tailored = false;
+    UBool tailoredDiacritics = false;
+    UBool lithuanianDotAbove = (uprv_strcmp(name, "lt") == 0);
+    UBool reordering = false;
+    UBool isRoot = uprv_strcmp(name, "root") == 0;
+    UChar32 diacriticLimit = ICU4X_DIACRITIC_LIMIT;
+    if (!data->base && isRoot) {
+        diacriticLimit = writeCollationDiacriticsTOML(outputdir, name, collationType, data, status);
+        if (U_FAILURE(*status)) {
+            return;
+        }
+        writeCollationJamoTOML(outputdir, name, collationType, data, status);
+        if (U_FAILURE(*status)) {
+            return;
+        }
+        writeCollationSpecialPrimariesTOML(outputdir, name, collationType, data, status);
+        if (U_FAILURE(*status)) {
+            return;
+        }
+    } else if (data->base && !lithuanianDotAbove) {
+        for (UChar32 c = ICU4X_DIACRITIC_BASE; c < ICU4X_DIACRITIC_LIMIT; ++c) {
+            if (c == 0x0340 || c == 0x0341 || c == 0x0343 || c == 0x0344) {
+                // These never occur in NFD data.
+                continue;
+            }
+            uint32_t ce32 = data->getCE32(c);
+            if ((ce32 != icu::Collation::FALLBACK_CE32) && (ce32 != data->base->getCE32(c))) {
+                tailoredDiacritics = true;
+                diacriticLimit = writeCollationDiacriticsTOML(outputdir, name, collationType, data, status);
+                if (U_FAILURE(*status)) {
+                    return;
+                }
+                break;
+            }
+        }
+    }
+
+    if (settings->hasReordering()) {
+        reordering = true;
+        // Note: There are duplicate reorderings. Expecting the ICU4X provider
+        // to take care of deduplication.
+        writeCollationReorderingTOML(outputdir, name, collationType, settings, status);
+        if (U_FAILURE(*status)) {
+            return;
+        }
+    }
+
+    // Write collation data if either base is non-null or the name is root.
+    // Languages that only reorder scripts are otherwise root-like and have
+    // null base.
+    if (data->base || isRoot) {
+        tailored = !isRoot;
+        writeCollationDataTOML(outputdir, name, collationType, data, (!data->base && isRoot), diacriticLimit, status);
+        if (U_FAILURE(*status)) {
+            return;
+        }
+    }
+
+    uint32_t maxVariable = (uint32_t)settings->getMaxVariable();
+    if (maxVariable >= 4) {
+        printf("Max variable out of range");
+        *status = U_INTERNAL_PROGRAM_ERROR;
+        return;
+    }
+
+    uint32_t metadataBits = maxVariable;
+    if (tailored) {
+        metadataBits |= (1 << 3);
+    }
+    if (tailoredDiacritics) {
+        metadataBits |= (1 << 4);
+    }
+    if (reordering) {
+        metadataBits |= (1 << 5);
+    }
+    if (lithuanianDotAbove) {
+        metadataBits |= (1 << 6);
+    }
+    if ((settings->options & icu::CollationSettings::BACKWARD_SECONDARY) != 0) {
+        metadataBits |= (1 << 7);
+    }
+    if (settings->getAlternateHandling() == UCOL_SHIFTED) {
+        metadataBits |= (1 << 8);
+    }
+    switch (settings->getCaseFirst()) {
+        case UCOL_OFF:
+            break;
+        case UCOL_UPPER_FIRST:
+            metadataBits |= (1 << 9);
+            metadataBits |= (1 << 10);
+            break;
+        case UCOL_LOWER_FIRST:
+            metadataBits |= (1 << 9);
+            break;
+        default:
+            *status = U_INTERNAL_PROGRAM_ERROR;
+            return;
+    }
+
+    writeCollationMetadataTOML(outputdir, name, collationType, metadataBits, status);
+}
+
+#endif  // !UCONFIG_NO_COLLATION
+
+static TableResource *
+addCollation(ParseState* state, TableResource  *result, const char *collationType,
+             uint32_t startline, UErrorCode *status)
+{
+    // TODO: Use LocalPointer for result, or make caller close it when there is a failure.
+    struct SResource  *member = nullptr;
+    struct UString    *tokenValue;
+    struct UString     comment;
+    enum   ETokenType  token;
+    char               subtag[1024];
+    UnicodeString      rules;
+    UBool              haveRules = false;
+    UVersionInfo       version;
+    uint32_t           line;
+
+    /* '{' . (name resource)* '}' */
+    version[0]=0; version[1]=0; version[2]=0; version[3]=0;
+
+    for (;;)
+    {
+        ustr_init(&comment);
+        token = getToken(state, &tokenValue, &comment, &line, status);
+
+        if (token == TOK_CLOSE_BRACE)
+        {
+            break;
+        }
+
+        if (token != TOK_STRING)
+        {
+            res_close(result);
+            *status = U_INVALID_FORMAT_ERROR;
+
+            if (token == TOK_EOF)
+            {
+                error(startline, "unterminated table");
+            }
+            else
+            {
+                error(line, "Unexpected token %s", tokenNames[token]);
+            }
+
+            return nullptr;
+        }
+
+        u_UCharsToChars(tokenValue->fChars, subtag, u_strlen(tokenValue->fChars) + 1);
+
+        if (U_FAILURE(*status))
+        {
+            res_close(result);
+            return nullptr;
+        }
+
+        member = parseResource(state, subtag, nullptr, status);
+
+        if (U_FAILURE(*status))
+        {
+            res_close(result);
+            return nullptr;
+        }
+        if (result == nullptr)
+        {
+            // Ignore the parsed resources, continue parsing.
+        }
+        else if (uprv_strcmp(subtag, "Version") == 0 && member->isString())
+        {
+            StringResource *sr = static_cast<StringResource *>(member);
+            char     ver[40];
+            int32_t length = sr->length();
+
+            if (length >= UPRV_LENGTHOF(ver))
+            {
+                length = UPRV_LENGTHOF(ver) - 1;
+            }
+
+            sr->fString.extract(0, length, ver, UPRV_LENGTHOF(ver), US_INV);
+            u_versionFromString(version, ver);
+
+            result->add(member, line, *status);
+            member = nullptr;
+        }
+        else if(uprv_strcmp(subtag, "%%CollationBin")==0)
+        {
+            /* discard duplicate %%CollationBin if any*/
+        }
+        else if (uprv_strcmp(subtag, "Sequence") == 0 && member->isString())
+        {
+            StringResource *sr = static_cast<StringResource *>(member);
+            rules = sr->fString;
+            haveRules = true;
+            // Defer building the collator until we have seen
+            // all sub-elements of the collation table, including the Version.
+            /* in order to achieve smaller data files, we can direct genrb */
+            /* to omit collation rules */
+            if(!state->omitCollationRules) {
+                result->add(member, line, *status);
+                member = nullptr;
+            }
+        }
+        else  // Just copy non-special items.
+        {
+            result->add(member, line, *status);
+            member = nullptr;
+        }
+        res_close(member);  // TODO: use LocalPointer
+        if (U_FAILURE(*status))
+        {
+            res_close(result);
+            return nullptr;
+        }
+    }
+
+    if (!haveRules) { return result; }
+
+#if UCONFIG_NO_COLLATION || UCONFIG_NO_FILE_IO
+    warning(line, "Not building collation elements because of UCONFIG_NO_COLLATION and/or UCONFIG_NO_FILE_IO, see uconfig.h");
+    (void)collationType;
+#else
+    // CLDR ticket #3949, ICU ticket #8082:
+    // Do not build collation binary data for for-import-only "private" collation rule strings.
+    if (uprv_strncmp(collationType, "private-", 8) == 0) {
+        if(isVerbose()) {
+            printf("Not building %s~%s collation binary\n", state->filename, collationType);
+        }
+        return result;
+    }
+
+    if(!state->makeBinaryCollation) {
+        if(isVerbose()) {
+            printf("Not building %s~%s collation binary\n", state->filename, collationType);
+        }
+        return result;
+    }
+    UErrorCode intStatus = U_ZERO_ERROR;
+    UParseError parseError;
+    uprv_memset(&parseError, 0, sizeof(parseError));
+    GenrbImporter importer(state->inputdir, state->outputdir);
+    const icu::CollationTailoring *base = icu::CollationRoot::getRoot(intStatus);
+    if(U_FAILURE(intStatus)) {
+        error(line, "failed to load root collator (ucadata.icu) - %s", u_errorName(intStatus));
+        res_close(result);
+        return nullptr;  // TODO: use LocalUResourceBundlePointer for result
+    }
+    icu::CollationBuilder builder(base, state->icu4xMode, intStatus);
+    if(state->icu4xMode || (uprv_strncmp(collationType, "search", 6) == 0)) {
+        builder.disableFastLatin();  // build fast-Latin table unless search collator or ICU4X
+    }
+    LocalPointer<icu::CollationTailoring> t(
+            builder.parseAndBuild(rules, version, &importer, &parseError, intStatus));
+    if(U_FAILURE(intStatus)) {
+        const char *reason = builder.getErrorReason();
+        if(reason == nullptr) { reason = ""; }
+        error(line, "CollationBuilder failed at %s~%s/Sequence rule offset %ld: %s  %s",
+                state->filename, collationType,
+                (long)parseError.offset, u_errorName(intStatus), reason);
+        if(parseError.preContext[0] != 0 || parseError.postContext[0] != 0) {
+            // Print pre- and post-context.
+            char preBuffer[100], postBuffer[100];
+            escape(parseError.preContext, preBuffer, sizeof(preBuffer));
+            escape(parseError.postContext, postBuffer, sizeof(postBuffer));
+            error(line, "  error context: \"...%s\" ! \"%s...\"", preBuffer, postBuffer);
+        }
+        if(isStrict() || t.isNull()) {
+            *status = intStatus;
+            res_close(result);
+            return nullptr;
+        }
+    }
+    if (state->icu4xMode) {
+        char *nameWithoutSuffix = static_cast<char *>(uprv_malloc(uprv_strlen(state->filename) + 1));
+        if (nameWithoutSuffix == nullptr) {
+            *status = U_MEMORY_ALLOCATION_ERROR;
+            res_close(result);
+            return nullptr;
+        }
+        uprv_strcpy(nameWithoutSuffix, state->filename);
+        *uprv_strrchr(nameWithoutSuffix, '.') = 0;
+
+        writeCollationTOML(state->outputdir, nameWithoutSuffix, collationType, t->data, t->settings, status);
+        uprv_free(nameWithoutSuffix);
+    }
+    icu::LocalMemory<uint8_t> buffer;
+    int32_t capacity = 100000;
+    uint8_t *dest = buffer.allocateInsteadAndCopy(capacity);
+    if(dest == nullptr) {
+        fprintf(stderr, "memory allocation (%ld bytes) for file contents failed\n",
+                (long)capacity);
+        *status = U_MEMORY_ALLOCATION_ERROR;
+        res_close(result);
+        return nullptr;
+    }
+    int32_t indexes[icu::CollationDataReader::IX_TOTAL_SIZE + 1];
+    int32_t totalSize = icu::CollationDataWriter::writeTailoring(
+            *t, *t->settings, indexes, dest, capacity, intStatus);
+    if(intStatus == U_BUFFER_OVERFLOW_ERROR) {
+        intStatus = U_ZERO_ERROR;
+        capacity = totalSize;
+        dest = buffer.allocateInsteadAndCopy(capacity);
+        if(dest == nullptr) {
+            fprintf(stderr, "memory allocation (%ld bytes) for file contents failed\n",
+                    (long)capacity);
+            *status = U_MEMORY_ALLOCATION_ERROR;
+            res_close(result);
+            return nullptr;
+        }
+        totalSize = icu::CollationDataWriter::writeTailoring(
+                *t, *t->settings, indexes, dest, capacity, intStatus);
+    }
+    if(U_FAILURE(intStatus)) {
+        fprintf(stderr, "CollationDataWriter::writeTailoring() failed: %s\n",
+                u_errorName(intStatus));
+        res_close(result);
+        return nullptr;
+    }
+    if(isVerbose()) {
+        printf("%s~%s collation tailoring part sizes:\n", state->filename, collationType);
+        icu::CollationInfo::printSizes(totalSize, indexes);
+        if(t->settings->hasReordering()) {
+            printf("%s~%s collation reordering ranges:\n", state->filename, collationType);
+            icu::CollationInfo::printReorderRanges(
+                    *t->data, t->settings->reorderCodes, t->settings->reorderCodesLength);
+        }
+#if 0  // debugging output
+    } else {
+        printf("%s~%s collation tailoring part sizes:\n", state->filename, collationType);
+        icu::CollationInfo::printSizes(totalSize, indexes);
+#endif
+    }
+    struct SResource *collationBin = bin_open(state->bundle, "%%CollationBin", totalSize, dest, nullptr, nullptr, status);
+    result->add(collationBin, line, *status);
+    if (U_FAILURE(*status)) {
+        res_close(result);
+        return nullptr;
+    }
+#endif
+    return result;
+}
+
+static UBool
+keepCollationType(const char * /*type*/) {
+    return true;
+}
+
+static struct SResource *
+parseCollationElements(ParseState* state, char *tag, uint32_t startline, UBool newCollation, UErrorCode *status)
+{
+    TableResource  *result = nullptr;
+    struct SResource  *member = nullptr;
+    struct UString    *tokenValue;
+    struct UString     comment;
+    enum   ETokenType  token;
+    char               subtag[1024], typeKeyword[1024];
+    uint32_t           line;
+
+    result = table_open(state->bundle, tag, nullptr, status);
+
+    if (result == nullptr || U_FAILURE(*status))
+    {
+        return nullptr;
+    }
+    if(isVerbose()){
+        printf(" collation elements %s at line %i \n",  (tag == nullptr) ? "(null)" : tag, (int)startline);
+    }
+    if(!newCollation) {
+        return addCollation(state, result, "(no type)", startline, status);
+    }
+    else {
+        for(;;) {
+            ustr_init(&comment);
+            token = getToken(state, &tokenValue, &comment, &line, status);
+
+            if (token == TOK_CLOSE_BRACE)
+            {
+                return result;
+            }
+
+            if (token != TOK_STRING)
+            {
+                res_close(result);
+                *status = U_INVALID_FORMAT_ERROR;
+
+                if (token == TOK_EOF)
+                {
+                    error(startline, "unterminated table");
+                }
+                else
+                {
+                    error(line, "Unexpected token %s", tokenNames[token]);
+                }
+
+                return nullptr;
+            }
+
+            u_UCharsToChars(tokenValue->fChars, subtag, u_strlen(tokenValue->fChars) + 1);
+
+            if (U_FAILURE(*status))
+            {
+                res_close(result);
+                return nullptr;
+            }
+
+            if (uprv_strcmp(subtag, "default") == 0)
+            {
+                member = parseResource(state, subtag, nullptr, status);
+
+                if (U_FAILURE(*status))
+                {
+                    res_close(result);
+                    return nullptr;
+                }
+
+                result->add(member, line, *status);
+            }
+            else
+            {
+                token = peekToken(state, 0, &tokenValue, &line, &comment, status);
+                /* this probably needs to be refactored or recursively use the parser */
+                /* first we assume that our collation table won't have the explicit type */
+                /* then, we cannot handle aliases */
+                if(token == TOK_OPEN_BRACE) {
+                    token = getToken(state, &tokenValue, &comment, &line, status);
+                    TableResource *collationRes;
+                    if (keepCollationType(subtag)) {
+                        collationRes = table_open(state->bundle, subtag, nullptr, status);
+                    } else {
+                        collationRes = nullptr;
+                    }
+                    // need to parse the collation data regardless
+                    collationRes = addCollation(state, collationRes, subtag, startline, status);
+                    if (collationRes != nullptr) {
+                        result->add(collationRes, startline, *status);
+                    }
+                } else if(token == TOK_COLON) { /* right now, we'll just try to see if we have aliases */
+                    /* we could have a table too */
+                    token = peekToken(state, 1, &tokenValue, &line, &comment, status);
+                    u_UCharsToChars(tokenValue->fChars, typeKeyword, u_strlen(tokenValue->fChars) + 1);
+                    if(uprv_strcmp(typeKeyword, "alias") == 0) {
+                        member = parseResource(state, subtag, nullptr, status);
+                        if (U_FAILURE(*status))
+                        {
+                            res_close(result);
+                            return nullptr;
+                        }
+
+                        result->add(member, line, *status);
+                    } else {
+                        res_close(result);
+                        *status = U_INVALID_FORMAT_ERROR;
+                        return nullptr;
+                    }
+                } else {
+                    res_close(result);
+                    *status = U_INVALID_FORMAT_ERROR;
+                    return nullptr;
+                }
+            }
+
+            /*member = string_open(bundle, subtag, tokenValue->fChars, tokenValue->fLength, status);*/
+
+            /*expect(TOK_CLOSE_BRACE, nullptr, nullptr, status);*/
+
+            if (U_FAILURE(*status))
+            {
+                res_close(result);
+                return nullptr;
+            }
+        }
+    }
+}
+
+/* Necessary, because CollationElements requires the bundle->fRoot member to be present which,
+   if this weren't special-cased, wouldn't be set until the entire file had been processed. */
+static struct SResource *
+realParseTable(ParseState* state, TableResource *table, char *tag, uint32_t startline, UErrorCode *status)
+{
+    struct SResource  *member = nullptr;
+    struct UString    *tokenValue=nullptr;
+    struct UString    comment;
+    enum   ETokenType token;
+    char              subtag[1024];
+    uint32_t          line;
+    UBool             readToken = false;
+
+    /* '{' . (name resource)* '}' */
+
+    if(isVerbose()){
+        printf(" parsing table %s at line %i \n", (tag == nullptr) ? "(null)" : tag, (int)startline);
+    }
+    for (;;)
+    {
+        ustr_init(&comment);
+        token = getToken(state, &tokenValue, &comment, &line, status);
+
+        if (token == TOK_CLOSE_BRACE)
+        {
+            if (!readToken && isVerbose()) {
+                warning(startline, "Encountered empty table");
+            }
+            return table;
+        }
+
+        if (token != TOK_STRING)
+        {
+            *status = U_INVALID_FORMAT_ERROR;
+
+            if (token == TOK_EOF)
+            {
+                error(startline, "unterminated table");
+            }
+            else
+            {
+                error(line, "unexpected token %s", tokenNames[token]);
+            }
+
+            return nullptr;
+        }
+
+        if(uprv_isInvariantUString(tokenValue->fChars, -1)) {
+            u_UCharsToChars(tokenValue->fChars, subtag, u_strlen(tokenValue->fChars) + 1);
+        } else {
+            *status = U_INVALID_FORMAT_ERROR;
+            error(line, "invariant characters required for table keys");
+            return nullptr;
+        }
+
+        if (U_FAILURE(*status))
+        {
+            error(line, "parse error. Stopped parsing tokens with %s", u_errorName(*status));
+            return nullptr;
+        }
+
+        member = parseResource(state, subtag, &comment, status);
+
+        if (member == nullptr || U_FAILURE(*status))
+        {
+            error(line, "parse error. Stopped parsing resource with %s", u_errorName(*status));
+            return nullptr;
+        }
+
+        table->add(member, line, *status);
+
+        if (U_FAILURE(*status))
+        {
+            error(line, "parse error. Stopped parsing table with %s", u_errorName(*status));
+            return nullptr;
+        }
+        readToken = true;
+        ustr_deinit(&comment);
+   }
+
+    /* not reached */
+    /* A compiler warning will appear if all paths don't contain a return statement. */
+/*     *status = U_INTERNAL_PROGRAM_ERROR;
+     return nullptr;*/
+}
+
+static struct SResource *
+parseTable(ParseState* state, char *tag, uint32_t startline, const struct UString *comment, UErrorCode *status)
+{
+    if (tag != nullptr && uprv_strcmp(tag, "CollationElements") == 0)
+    {
+        return parseCollationElements(state, tag, startline, false, status);
+    }
+    if (tag != nullptr && uprv_strcmp(tag, "collations") == 0)
+    {
+        return parseCollationElements(state, tag, startline, true, status);
+    }
+    if(isVerbose()){
+        printf(" table %s at line %i \n",  (tag == nullptr) ? "(null)" : tag, (int)startline);
+    }
+
+    TableResource *result = table_open(state->bundle, tag, comment, status);
+
+    if (result == nullptr || U_FAILURE(*status))
+    {
+        return nullptr;
+    }
+    return realParseTable(state, result, tag, startline,  status);
+}
+
+static struct SResource *
+parseArray(ParseState* state, char *tag, uint32_t startline, const struct UString *comment, UErrorCode *status)
+{
+    struct SResource  *member = nullptr;
+    struct UString    *tokenValue;
+    struct UString    memberComments;
+    enum   ETokenType token;
+    UBool             readToken = false;
+
+    ArrayResource  *result = array_open(state->bundle, tag, comment, status);
+
+    if (result == nullptr || U_FAILURE(*status))
+    {
+        return nullptr;
+    }
+    if(isVerbose()){
+        printf(" array %s at line %i \n",  (tag == nullptr) ? "(null)" : tag, (int)startline);
+    }
+
+    ustr_init(&memberComments);
+
+    /* '{' . resource [','] '}' */
+    for (;;)
+    {
+        /* reset length */
+        ustr_setlen(&memberComments, 0, status);
+
+        /* check for end of array, but don't consume next token unless it really is the end */
+        token = peekToken(state, 0, &tokenValue, nullptr, &memberComments, status);
+
+
+        if (token == TOK_CLOSE_BRACE)
+        {
+            getToken(state, nullptr, nullptr, nullptr, status);
+            if (!readToken) {
+                warning(startline, "Encountered empty array");
+            }
+            break;
+        }
+
+        if (token == TOK_EOF)
+        {
+            res_close(result);
+            *status = U_INVALID_FORMAT_ERROR;
+            error(startline, "unterminated array");
+            return nullptr;
+        }
+
+        /* string arrays are a special case */
+        if (token == TOK_STRING)
+        {
+            getToken(state, &tokenValue, &memberComments, nullptr, status);
+            member = string_open(state->bundle, nullptr, tokenValue->fChars, tokenValue->fLength, &memberComments, status);
+        }
+        else
+        {
+            member = parseResource(state, nullptr, &memberComments, status);
+        }
+
+        if (member == nullptr || U_FAILURE(*status))
+        {
+            res_close(result);
+            return nullptr;
+        }
+
+        result->add(member);
+
+        /* eat optional comma if present */
+        token = peekToken(state, 0, nullptr, nullptr, nullptr, status);
+
+        if (token == TOK_COMMA)
+        {
+            getToken(state, nullptr, nullptr, nullptr, status);
+        }
+
+        if (U_FAILURE(*status))
+        {
+            res_close(result);
+            return nullptr;
+        }
+        readToken = true;
+    }
+
+    ustr_deinit(&memberComments);
+    return result;
+}
+
+static struct SResource *
+parseIntVector(ParseState* state, char *tag, uint32_t startline, const struct UString *comment, UErrorCode *status)
+{
+    enum   ETokenType  token;
+    char              *string;
+    int32_t            value;
+    UBool              readToken = false;
+    char              *stopstring;
+    struct UString     memberComments;
+
+    IntVectorResource *result = intvector_open(state->bundle, tag, comment, status);
+
+    if (result == nullptr || U_FAILURE(*status))
+    {
+        return nullptr;
+    }
+
+    if(isVerbose()){
+        printf(" vector %s at line %i \n",  (tag == nullptr) ? "(null)" : tag, (int)startline);
+    }
+    ustr_init(&memberComments);
+    /* '{' . string [','] '}' */
+    for (;;)
+    {
+        ustr_setlen(&memberComments, 0, status);
+
+        /* check for end of array, but don't consume next token unless it really is the end */
+        token = peekToken(state, 0, nullptr, nullptr,&memberComments, status);
+
+        if (token == TOK_CLOSE_BRACE)
+        {
+            /* it's the end, consume the close brace */
+            getToken(state, nullptr, nullptr, nullptr, status);
+            if (!readToken) {
+                warning(startline, "Encountered empty int vector");
+            }
+            ustr_deinit(&memberComments);
+            return result;
+        }
+
+        int32_t stringLength;
+        string = getInvariantString(state, nullptr, nullptr, stringLength, status);
+
+        if (U_FAILURE(*status))
+        {
+            res_close(result);
+            return nullptr;
+        }
+
+        /* For handling illegal char in the Intvector */
+        value = uprv_strtoul(string, &stopstring, 0);/* make intvector support decimal,hexdigit,octal digit ranging from -2^31-2^32-1*/
+        int32_t len = (int32_t)(stopstring-string);
+
+        if(len==stringLength)
+        {
+            result->add(value, *status);
+            uprv_free(string);
+            token = peekToken(state, 0, nullptr, nullptr, nullptr, status);
+        }
+        else
+        {
+            uprv_free(string);
+            *status=U_INVALID_CHAR_FOUND;
+        }
+
+        if (U_FAILURE(*status))
+        {
+            res_close(result);
+            return nullptr;
+        }
+
+        /* the comma is optional (even though it is required to prevent the reader from concatenating
+        consecutive entries) so that a missing comma on the last entry isn't an error */
+        if (token == TOK_COMMA)
+        {
+            getToken(state, nullptr, nullptr, nullptr, status);
+        }
+        readToken = true;
+    }
+
+    /* not reached */
+    /* A compiler warning will appear if all paths don't contain a return statement. */
+/*    intvector_close(result, status);
+    *status = U_INTERNAL_PROGRAM_ERROR;
+    return nullptr;*/
+}
+
+static struct SResource *
+parseBinary(ParseState* state, char *tag, uint32_t startline, const struct UString *comment, UErrorCode *status)
+{
+    uint32_t line;
+    int32_t stringLength;
+    LocalMemory<char> string(getInvariantString(state, &line, nullptr, stringLength, status));
+    if (string.isNull() || U_FAILURE(*status))
+    {
+        return nullptr;
+    }
+
+    expect(state, TOK_CLOSE_BRACE, nullptr, nullptr, nullptr, status);
+    if (U_FAILURE(*status))
+    {
+        return nullptr;
+    }
+
+    if(isVerbose()){
+        printf(" binary %s at line %i \n",  (tag == nullptr) ? "(null)" : tag, (int)startline);
+    }
+
+    LocalMemory<uint8_t> value;
+    int32_t count = 0;
+    if (stringLength > 0 && value.allocateInsteadAndCopy(stringLength) == nullptr)
+    {
+        *status = U_MEMORY_ALLOCATION_ERROR;
+        return nullptr;
+    }
+
+    char toConv[3] = {'\0', '\0', '\0'};
+    for (int32_t i = 0; i < stringLength;)
+    {
+        // Skip spaces (which may have been line endings).
+        char c0 = string[i++];
+        if (c0 == ' ') { continue; }
+        if (i == stringLength) {
+            *status=U_INVALID_CHAR_FOUND;
+            error(line, "Encountered invalid binary value (odd number of hex digits)");
+            return nullptr;
+        }
+        toConv[0] = c0;
+        toConv[1] = string[i++];
+
+        char *stopstring;
+        value[count++] = (uint8_t) uprv_strtoul(toConv, &stopstring, 16);
+        uint32_t len=(uint32_t)(stopstring-toConv);
+
+        if(len!=2)
+        {
+            *status=U_INVALID_CHAR_FOUND;
+            error(line, "Encountered invalid binary value (not all pairs of hex digits)");
+            return nullptr;
+        }
+    }
+
+    if (count == 0) {
+        warning(startline, "Encountered empty binary value");
+        return bin_open(state->bundle, tag, 0, nullptr, "", comment, status);
+    } else {
+        return bin_open(state->bundle, tag, count, value.getAlias(), nullptr, comment, status);
+    }
+}
+
+static struct SResource *
+parseInteger(ParseState* state, char *tag, uint32_t startline, const struct UString *comment, UErrorCode *status)
+{
+    struct SResource *result = nullptr;
+    int32_t           value;
+    char             *string;
+    char             *stopstring;
+
+    int32_t stringLength;
+    string = getInvariantString(state, nullptr, nullptr, stringLength, status);
+
+    if (string == nullptr || U_FAILURE(*status))
+    {
+        return nullptr;
+    }
+
+    expect(state, TOK_CLOSE_BRACE, nullptr, nullptr, nullptr, status);
+
+    if (U_FAILURE(*status))
+    {
+        uprv_free(string);
+        return nullptr;
+    }
+
+    if(isVerbose()){
+        printf(" integer %s at line %i \n",  (tag == nullptr) ? "(null)" : tag, (int)startline);
+    }
+
+    if (stringLength == 0)
+    {
+        warning(startline, "Encountered empty integer. Default value is 0.");
+    }
+
+    /* Allow integer support for hexdecimal, octal digit and decimal*/
+    /* and handle illegal char in the integer*/
+    value = uprv_strtoul(string, &stopstring, 0);
+    int32_t len = (int32_t)(stopstring-string);
+    if(len==stringLength)
+    {
+        result = int_open(state->bundle, tag, value, comment, status);
+    }
+    else
+    {
+        *status=U_INVALID_CHAR_FOUND;
+    }
+    uprv_free(string);
+
+    return result;
+}
+
+static struct SResource *
+parseImport(ParseState* state, char *tag, uint32_t startline, const struct UString* comment, UErrorCode *status)
+{
+    uint32_t          line;
+    int32_t stringLength;
+    LocalMemory<char> filename(getInvariantString(state, &line, nullptr, stringLength, status));
+    if (U_FAILURE(*status))
+    {
+        return nullptr;
+    }
+
+    expect(state, TOK_CLOSE_BRACE, nullptr, nullptr, nullptr, status);
+
+    if (U_FAILURE(*status))
+    {
+        return nullptr;
+    }
+
+    if(isVerbose()){
+        printf(" import %s at line %i \n",  (tag == nullptr) ? "(null)" : tag, (int)startline);
+    }
+
+    /* Open the input file for reading */
+    CharString fullname;
+    if (state->inputdir != nullptr) {
+        fullname.append(state->inputdir, *status);
+    }
+    fullname.appendPathPart(filename.getAlias(), *status);
+    if (U_FAILURE(*status)) {
+        return nullptr;
+    }
+
+    FileStream *file = T_FileStream_open(fullname.data(), "rb");
+    if (file == nullptr)
+    {
+        error(line, "couldn't open input file %s", filename.getAlias());
+        *status = U_FILE_ACCESS_ERROR;
+        return nullptr;
+    }
+
+    int32_t len  = T_FileStream_size(file);
+    LocalMemory<uint8_t> data;
+    if(data.allocateInsteadAndCopy(len) == nullptr)
+    {
+        *status = U_MEMORY_ALLOCATION_ERROR;
+        T_FileStream_close (file);
+        return nullptr;
+    }
+
+    /* int32_t numRead = */ T_FileStream_read(file, data.getAlias(), len);
+    T_FileStream_close (file);
+
+    return bin_open(state->bundle, tag, len, data.getAlias(), fullname.data(), comment, status);
+}
+
+static struct SResource *
+parseInclude(ParseState* state, char *tag, uint32_t startline, const struct UString* comment, UErrorCode *status)
+{
+    struct SResource *result;
+    int32_t           len=0;
+    char             *filename;
+    uint32_t          line;
+    char16_t *pTarget     = nullptr;
+
+    UCHARBUF *ucbuf;
+    char     *fullname = nullptr;
+    const char* cp = nullptr;
+    const char16_t* uBuffer = nullptr;
+
+    int32_t stringLength;
+    filename = getInvariantString(state, &line, nullptr, stringLength, status);
+
+    if (U_FAILURE(*status))
+    {
+        return nullptr;
+    }
+
+    expect(state, TOK_CLOSE_BRACE, nullptr, nullptr, nullptr, status);
+
+    if (U_FAILURE(*status))
+    {
+        uprv_free(filename);
+        return nullptr;
+    }
+
+    if(isVerbose()){
+        printf(" include %s at line %i \n",  (tag == nullptr) ? "(null)" : tag, (int)startline);
+    }
+
+    fullname = (char *) uprv_malloc(state->inputdirLength + stringLength + 2);
+    /* test for nullptr */
+    if(fullname == nullptr)
+    {
+        *status = U_MEMORY_ALLOCATION_ERROR;
+        uprv_free(filename);
+        return nullptr;
+    }
+
+    if(state->inputdir!=nullptr){
+        if (state->inputdir[state->inputdirLength - 1] != U_FILE_SEP_CHAR)
+        {
+
+            uprv_strcpy(fullname, state->inputdir);
+
+            fullname[state->inputdirLength]      = U_FILE_SEP_CHAR;
+            fullname[state->inputdirLength + 1] = '\0';
+
+            uprv_strcat(fullname, filename);
+        }
+        else
+        {
+            uprv_strcpy(fullname, state->inputdir);
+            uprv_strcat(fullname, filename);
+        }
+    }else{
+        uprv_strcpy(fullname,filename);
+    }
+
+    ucbuf = ucbuf_open(fullname, &cp,getShowWarning(),false,status);
+
+    if (U_FAILURE(*status)) {
+        error(line, "couldn't open input file %s\n", filename);
+        return nullptr;
+    }
+
+    uBuffer = ucbuf_getBuffer(ucbuf,&len,status);
+    result = string_open(state->bundle, tag, uBuffer, len, comment, status);
+
+    ucbuf_close(ucbuf);
+
+    uprv_free(pTarget);
+
+    uprv_free(filename);
+    uprv_free(fullname);
+
+    return result;
+}
+
+
+
+
+
+U_STRING_DECL(k_type_string,    "string",    6);
+U_STRING_DECL(k_type_binary,    "binary",    6);
+U_STRING_DECL(k_type_bin,       "bin",       3);
+U_STRING_DECL(k_type_table,     "table",     5);
+U_STRING_DECL(k_type_table_no_fallback,     "table(nofallback)",         17);
+U_STRING_DECL(k_type_int,       "int",       3);
+U_STRING_DECL(k_type_integer,   "integer",   7);
+U_STRING_DECL(k_type_array,     "array",     5);
+U_STRING_DECL(k_type_alias,     "alias",     5);
+U_STRING_DECL(k_type_intvector, "intvector", 9);
+U_STRING_DECL(k_type_import,    "import",    6);
+U_STRING_DECL(k_type_include,   "include",   7);
+
+/* Various non-standard processing plugins that create one or more special resources. */
+U_STRING_DECL(k_type_plugin_uca_rules,      "process(uca_rules)",        18);
+U_STRING_DECL(k_type_plugin_collation,      "process(collation)",        18);
+U_STRING_DECL(k_type_plugin_transliterator, "process(transliterator)",   23);
+U_STRING_DECL(k_type_plugin_dependency,     "process(dependency)",       19);
+
+typedef enum EResourceType
+{
+    RESTYPE_UNKNOWN,
+    RESTYPE_STRING,
+    RESTYPE_BINARY,
+    RESTYPE_TABLE,
+    RESTYPE_TABLE_NO_FALLBACK,
+    RESTYPE_INTEGER,
+    RESTYPE_ARRAY,
+    RESTYPE_ALIAS,
+    RESTYPE_INTVECTOR,
+    RESTYPE_IMPORT,
+    RESTYPE_INCLUDE,
+    RESTYPE_PROCESS_UCA_RULES,
+    RESTYPE_PROCESS_COLLATION,
+    RESTYPE_PROCESS_TRANSLITERATOR,
+    RESTYPE_PROCESS_DEPENDENCY,
+    RESTYPE_RESERVED
+} EResourceType;
+
+static struct {
+    const char *nameChars;   /* only used for debugging */
+    const char16_t *nameUChars;
+    ParseResourceFunction *parseFunction;
+} gResourceTypes[] = {
+    {"Unknown", nullptr, nullptr},
+    {"string", k_type_string, parseString},
+    {"binary", k_type_binary, parseBinary},
+    {"table", k_type_table, parseTable},
+    {"table(nofallback)", k_type_table_no_fallback, nullptr}, /* parseFunction will never be called */
+    {"integer", k_type_integer, parseInteger},
+    {"array", k_type_array, parseArray},
+    {"alias", k_type_alias, parseAlias},
+    {"intvector", k_type_intvector, parseIntVector},
+    {"import", k_type_import, parseImport},
+    {"include", k_type_include, parseInclude},
+    {"process(uca_rules)", k_type_plugin_uca_rules, parseUCARules},
+    {"process(collation)", k_type_plugin_collation, nullptr /* not implemented yet */},
+    {"process(transliterator)", k_type_plugin_transliterator, parseTransliterator},
+    {"process(dependency)", k_type_plugin_dependency, parseDependency},
+    {"reserved", nullptr, nullptr}
+};
+
+void initParser()
+{
+    U_STRING_INIT(k_type_string,    "string",    6);
+    U_STRING_INIT(k_type_binary,    "binary",    6);
+    U_STRING_INIT(k_type_bin,       "bin",       3);
+    U_STRING_INIT(k_type_table,     "table",     5);
+    U_STRING_INIT(k_type_table_no_fallback,     "table(nofallback)",         17);
+    U_STRING_INIT(k_type_int,       "int",       3);
+    U_STRING_INIT(k_type_integer,   "integer",   7);
+    U_STRING_INIT(k_type_array,     "array",     5);
+    U_STRING_INIT(k_type_alias,     "alias",     5);
+    U_STRING_INIT(k_type_intvector, "intvector", 9);
+    U_STRING_INIT(k_type_import,    "import",    6);
+    U_STRING_INIT(k_type_include,   "include",   7);
+
+    U_STRING_INIT(k_type_plugin_uca_rules,      "process(uca_rules)",        18);
+    U_STRING_INIT(k_type_plugin_collation,      "process(collation)",        18);
+    U_STRING_INIT(k_type_plugin_transliterator, "process(transliterator)",   23);
+    U_STRING_INIT(k_type_plugin_dependency,     "process(dependency)",       19);
+}
+
+static inline UBool isTable(enum EResourceType type) {
+    return (UBool)(type==RESTYPE_TABLE || type==RESTYPE_TABLE_NO_FALLBACK);
+}
+
+static enum EResourceType
+parseResourceType(ParseState* state, UErrorCode *status)
+{
+    struct UString        *tokenValue;
+    struct UString        comment;
+    enum   EResourceType  result = RESTYPE_UNKNOWN;
+    uint32_t              line=0;
+    ustr_init(&comment);
+    expect(state, TOK_STRING, &tokenValue, &comment, &line, status);
+
+    if (U_FAILURE(*status))
+    {
+        return RESTYPE_UNKNOWN;
+    }
+
+    *status = U_ZERO_ERROR;
+
+    /* Search for normal types */
+    result=RESTYPE_UNKNOWN;
+    while ((result=(EResourceType)(result+1)) < RESTYPE_RESERVED) {
+        if (u_strcmp(tokenValue->fChars, gResourceTypes[result].nameUChars) == 0) {
+            break;
+        }
+    }
+    /* Now search for the aliases */
+    if (u_strcmp(tokenValue->fChars, k_type_int) == 0) {
+        result = RESTYPE_INTEGER;
+    }
+    else if (u_strcmp(tokenValue->fChars, k_type_bin) == 0) {
+        result = RESTYPE_BINARY;
+    }
+    else if (result == RESTYPE_RESERVED) {
+        char tokenBuffer[1024];
+        u_austrncpy(tokenBuffer, tokenValue->fChars, sizeof(tokenBuffer));
+        tokenBuffer[sizeof(tokenBuffer) - 1] = 0;
+        *status = U_INVALID_FORMAT_ERROR;
+        error(line, "unknown resource type '%s'", tokenBuffer);
+    }
+
+    return result;
+}
+
+/* parse a non-top-level resource */
+static struct SResource *
+parseResource(ParseState* state, char *tag, const struct UString *comment, UErrorCode *status)
+{
+    enum   ETokenType      token;
+    enum   EResourceType  resType = RESTYPE_UNKNOWN;
+    ParseResourceFunction *parseFunction = nullptr;
+    struct UString        *tokenValue;
+    uint32_t                 startline;
+    uint32_t                 line;
+
+
+    token = getToken(state, &tokenValue, nullptr, &startline, status);
+
+    if(isVerbose()){
+        printf(" resource %s at line %i \n",  (tag == nullptr) ? "(null)" : tag, (int)startline);
+    }
+
+    /* name . [ ':' type ] '{' resource '}' */
+    /* This function parses from the colon onwards.  If the colon is present, parse the
+    type then try to parse a resource of that type.  If there is no explicit type,
+    work it out using the lookahead tokens. */
+    switch (token)
+    {
+    case TOK_EOF:
+        *status = U_INVALID_FORMAT_ERROR;
+        error(startline, "Unexpected EOF encountered");
+        return nullptr;
+
+    case TOK_ERROR:
+        *status = U_INVALID_FORMAT_ERROR;
+        return nullptr;
+
+    case TOK_COLON:
+        resType = parseResourceType(state, status);
+        expect(state, TOK_OPEN_BRACE, &tokenValue, nullptr, &startline, status);
+
+        if (U_FAILURE(*status))
+        {
+            return nullptr;
+        }
+
+        break;
+
+    case TOK_OPEN_BRACE:
+        break;
+
+    default:
+        *status = U_INVALID_FORMAT_ERROR;
+        error(startline, "syntax error while reading a resource, expected '{' or ':'");
+        return nullptr;
+    }
+
+
+    if (resType == RESTYPE_UNKNOWN)
+    {
+        /* No explicit type, so try to work it out.  At this point, we've read the first '{'.
+        We could have any of the following:
+        { {         => array (nested)
+        { :/}       => array
+        { string ,  => string array
+
+        { string {  => table
+
+        { string :/{    => table
+        { string }      => string
+        */
+
+        token = peekToken(state, 0, nullptr, &line, nullptr,status);
+
+        if (U_FAILURE(*status))
+        {
+            return nullptr;
+        }
+
+        if (token == TOK_OPEN_BRACE || token == TOK_COLON ||token ==TOK_CLOSE_BRACE )
+        {
+            resType = RESTYPE_ARRAY;
+        }
+        else if (token == TOK_STRING)
+        {
+            token = peekToken(state, 1, nullptr, &line, nullptr, status);
+
+            if (U_FAILURE(*status))
+            {
+                return nullptr;
+            }
+
+            switch (token)
+            {
+            case TOK_COMMA:         resType = RESTYPE_ARRAY;  break;
+            case TOK_OPEN_BRACE:    resType = RESTYPE_TABLE;  break;
+            case TOK_CLOSE_BRACE:   resType = RESTYPE_STRING; break;
+            case TOK_COLON:         resType = RESTYPE_TABLE;  break;
+            default:
+                *status = U_INVALID_FORMAT_ERROR;
+                error(line, "Unexpected token after string, expected ',', '{' or '}'");
+                return nullptr;
+            }
+        }
+        else
+        {
+            *status = U_INVALID_FORMAT_ERROR;
+            error(line, "Unexpected token after '{'");
+            return nullptr;
+        }
+
+        /* printf("Type guessed as %s\n", resourceNames[resType]); */
+    } else if(resType == RESTYPE_TABLE_NO_FALLBACK) {
+        *status = U_INVALID_FORMAT_ERROR;
+        error(startline, "error: %s resource type not valid except on top bundle level", gResourceTypes[resType].nameChars);
+        return nullptr;
+    }
+
+
+    /* We should now know what we need to parse next, so call the appropriate parser
+    function and return. */
+    parseFunction = gResourceTypes[resType].parseFunction;
+    if (parseFunction != nullptr) {
+        return parseFunction(state, tag, startline, comment, status);
+    }
+    else {
+        *status = U_INTERNAL_PROGRAM_ERROR;
+        error(startline, "internal error: %s resource type found and not handled", gResourceTypes[resType].nameChars);
+    }
+
+    return nullptr;
+}
+
+/* parse the top-level resource */
+struct SRBRoot *
+parse(UCHARBUF *buf, const char *inputDir, const char *outputDir, const char *filename,
+      UBool makeBinaryCollation, UBool omitCollationRules, UBool icu4xMode, UErrorCode *status)
+{
+    struct UString    *tokenValue;
+    struct UString    comment;
+    uint32_t           line;
+    enum EResourceType bundleType;
+    enum ETokenType    token;
+    ParseState state;
+    uint32_t i;
+
+
+    for (i = 0; i < MAX_LOOKAHEAD + 1; i++)
+    {
+        ustr_init(&state.lookahead[i].value);
+        ustr_init(&state.lookahead[i].comment);
+    }
+
+    initLookahead(&state, buf, status);
+
+    state.inputdir       = inputDir;
+    state.inputdirLength = (state.inputdir != nullptr) ? (uint32_t)uprv_strlen(state.inputdir) : 0;
+    state.outputdir       = outputDir;
+    state.outputdirLength = (state.outputdir != nullptr) ? (uint32_t)uprv_strlen(state.outputdir) : 0;
+    state.filename = filename;
+    state.makeBinaryCollation = makeBinaryCollation;
+    state.omitCollationRules = omitCollationRules;
+    state.icu4xMode = icu4xMode;
+
+    ustr_init(&comment);
+    expect(&state, TOK_STRING, &tokenValue, &comment, nullptr, status);
+
+    state.bundle = new SRBRoot(&comment, false, *status);
+
+    if (state.bundle == nullptr || U_FAILURE(*status))
+    {
+        delete state.bundle;
+
+        return nullptr;
+    }
+
+
+    state.bundle->setLocale(tokenValue->fChars, *status);
+
+    /* The following code is to make Empty bundle work no matter with :table specifer or not */
+    token = getToken(&state, nullptr, nullptr, &line, status);
+    if(token==TOK_COLON) {
+        *status=U_ZERO_ERROR;
+        bundleType=parseResourceType(&state, status);
+
+        if(isTable(bundleType))
+        {
+            expect(&state, TOK_OPEN_BRACE, nullptr, nullptr, &line, status);
+        }
+        else
+        {
+            *status=U_PARSE_ERROR;
+             error(line, "parse error. Stopped parsing with %s", u_errorName(*status));
+        }
+    }
+    else
+    {
+        /* not a colon */
+        if(token==TOK_OPEN_BRACE)
+        {
+            *status=U_ZERO_ERROR;
+            bundleType=RESTYPE_TABLE;
+        }
+        else
+        {
+            /* neither colon nor open brace */
+            *status=U_PARSE_ERROR;
+            bundleType=RESTYPE_UNKNOWN;
+            error(line, "parse error, did not find open-brace '{' or colon ':', stopped with %s", u_errorName(*status));
+        }
+    }
+
+    if (U_FAILURE(*status))
+    {
+        delete state.bundle;
+        return nullptr;
+    }
+
+    if(bundleType==RESTYPE_TABLE_NO_FALLBACK) {
+        /*
+         * Parse a top-level table with the table(nofallback) declaration.
+         * This is the same as a regular table, but also sets the
+         * URES_ATT_NO_FALLBACK flag in indexes[URES_INDEX_ATTRIBUTES] .
+         */
+        state.bundle->fNoFallback=true;
+    }
+    /* top-level tables need not handle special table names like "collations" */
+    assert(!state.bundle->fIsPoolBundle);
+    assert(state.bundle->fRoot->fType == URES_TABLE);
+    TableResource *rootTable = static_cast<TableResource *>(state.bundle->fRoot);
+    realParseTable(&state, rootTable, nullptr, line, status);
+    if(dependencyArray!=nullptr){
+        rootTable->add(dependencyArray, 0, *status);
+        dependencyArray = nullptr;
+    }
+   if (U_FAILURE(*status))
+    {
+        delete state.bundle;
+        res_close(dependencyArray);
+        return nullptr;
+    }
+
+    if (getToken(&state, nullptr, nullptr, &line, status) != TOK_EOF)
+    {
+        warning(line, "extraneous text after resource bundle (perhaps unmatched braces)");
+        if(isStrict()){
+            *status = U_INVALID_FORMAT_ERROR;
+            return nullptr;
+        }
+    }
+
+    cleanupLookahead(&state);
+    ustr_deinit(&comment);
+    return state.bundle;
+}
diff --git a/intl/icu/source/tools/genrb/parse.h b/intl/icu/source/tools/genrb/parse.h
new file mode 100644
index 0000000000..fa90ede9d2
--- /dev/null
+++ b/intl/icu/source/tools/genrb/parse.h
@@ -0,0 +1,38 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 1998-2014, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*
+* File parse.h
+*
+* Modification History:
+*
+*   Date        Name        Description
+*   05/26/99    stephen     Creation.
+*******************************************************************************
+*/
+
+#ifndef PARSE_H
+#define PARSE_H 1
+
+#include "unicode/utypes.h"
+#include "filestrm.h"
+#include "ucbuf.h"
+
+U_CDECL_BEGIN
+/* One time parser initialization */
+void initParser();
+
+/* Parse a ResourceBundle text file */
+struct SRBRoot* parse(UCHARBUF *buf, const char* inputDir, const char* outputDir,
+                      const char *filename,
+                      UBool makeBinaryCollation, UBool omitCollationRules, UBool icu4xMode, UErrorCode *status);
+
+U_CDECL_END
+
+#endif
diff --git a/intl/icu/source/tools/genrb/prscmnts.cpp b/intl/icu/source/tools/genrb/prscmnts.cpp
new file mode 100644
index 0000000000..ea55352b41
--- /dev/null
+++ b/intl/icu/source/tools/genrb/prscmnts.cpp
@@ -0,0 +1,248 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+ *******************************************************************************
+ *   Copyright (C) 2003-2014, International Business Machines
+ *   Corporation and others.  All Rights Reserved.
+ *******************************************************************************
+ *
+ * File prscmnts.cpp
+ *
+ * Modification History:
+ *
+ *   Date          Name        Description
+ *   08/22/2003    ram         Creation.
+ *******************************************************************************
+ */
+
+// Safer use of UnicodeString.
+#ifndef UNISTR_FROM_CHAR_EXPLICIT
+#   define UNISTR_FROM_CHAR_EXPLICIT explicit
+#endif
+
+// Less important, but still a good idea.
+#ifndef UNISTR_FROM_STRING_EXPLICIT
+#   define UNISTR_FROM_STRING_EXPLICIT explicit
+#endif
+
+#include "unicode/regex.h"
+#include "unicode/unistr.h"
+#include "unicode/parseerr.h"
+#include "prscmnts.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+U_NAMESPACE_USE
+
+#if UCONFIG_NO_REGULAR_EXPRESSIONS==0 /* donot compile when RegularExpressions not available */
+
+#define MAX_SPLIT_STRINGS 20
+
+const char *patternStrings[UPC_LIMIT]={
+    "^translate\\s*(.*)",
+    "^note\\s*(.*)"
+};
+
+U_CFUNC int32_t 
+removeText(char16_t *source, int32_t srcLen,
+           UnicodeString patString,uint32_t options,  
+           UnicodeString replaceText, UErrorCode *status){
+
+    if(status == nullptr || U_FAILURE(*status)){
+        return 0;
+    }
+
+    UnicodeString src(source, srcLen);
+
+    RegexMatcher    myMatcher(patString, src, options, *status);
+    if(U_FAILURE(*status)){
+        return 0;
+    }
+    UnicodeString dest;
+
+
+    dest = myMatcher.replaceAll(replaceText,*status);
+    
+    
+    return dest.extract(source, srcLen, *status);
+
+}
+U_CFUNC int32_t
+trim(char16_t *src, int32_t srcLen, UErrorCode *status){
+     srcLen = removeText(src, srcLen, UnicodeString("^[ \\r\\n]+ "), 0, UnicodeString(), status); // remove leading new lines
+     srcLen = removeText(src, srcLen, UnicodeString("^\\s+"), 0, UnicodeString(), status); // remove leading spaces
+     srcLen = removeText(src, srcLen, UnicodeString("\\s+$"), 0, UnicodeString(), status); // remove trailing spcaes
+     return srcLen;
+}
+
+U_CFUNC int32_t 
+removeCmtText(char16_t* source, int32_t srcLen, UErrorCode* status){
+    srcLen = trim(source, srcLen, status);
+    UnicodeString patString("^\\s*?\\*\\s*?");  // remove pattern like " * " at the beginning of the line
+    srcLen = removeText(source, srcLen, patString, UREGEX_MULTILINE, UnicodeString(), status);
+    return removeText(source, srcLen, UnicodeString("[ \\r\\n]+"), 0, UnicodeString(" "), status);// remove new lines;
+}
+
+U_CFUNC int32_t 
+getText(const char16_t* source, int32_t srcLen,
+        char16_t** dest, int32_t destCapacity,
+        UnicodeString patternString, 
+        UErrorCode* status){
+    
+    if(status == nullptr || U_FAILURE(*status)){
+        return 0;
+    }
+
+    UnicodeString     stringArray[MAX_SPLIT_STRINGS];
+    RegexPattern      *pattern = RegexPattern::compile(UnicodeString("@"), 0, *status);
+    UnicodeString src (source,srcLen);
+    
+    if (U_FAILURE(*status)) {
+        return 0;
+    }
+    pattern->split(src, stringArray, MAX_SPLIT_STRINGS, *status);
+    
+    RegexMatcher matcher(patternString, UREGEX_DOTALL, *status);
+    if (U_FAILURE(*status)) {
+        return 0;
+    }
+    for(int32_t i=0; i<MAX_SPLIT_STRINGS; i++){
+        matcher.reset(stringArray[i]);
+        if(matcher.lookingAt(*status)){
+            UnicodeString out = matcher.group(1, *status);
+
+            return out.extract(*dest, destCapacity,*status);
+        }
+    }
+    return 0;
+}
+
+
+#define AT_SIGN  0x0040
+
+U_CFUNC int32_t
+getDescription( const char16_t* source, int32_t srcLen,
+                char16_t** dest, int32_t destCapacity,
+                UErrorCode* status){
+    if(status == nullptr || U_FAILURE(*status)){
+        return 0;
+    }
+
+    UnicodeString     stringArray[MAX_SPLIT_STRINGS];
+    RegexPattern      *pattern = RegexPattern::compile(UnicodeString("@"), UREGEX_MULTILINE, *status);
+    UnicodeString src(source, srcLen);
+    
+    if (U_FAILURE(*status)) {
+        return 0;
+    }
+    pattern->split(src, stringArray,MAX_SPLIT_STRINGS , *status);
+
+    if(stringArray[0].indexOf((char16_t)AT_SIGN)==-1){
+        int32_t destLen =  stringArray[0].extract(*dest, destCapacity, *status);
+        return trim(*dest, destLen, status);
+    }
+    return 0;
+}
+
+U_CFUNC int32_t
+getCount(const char16_t* source, int32_t srcLen,
+         UParseCommentsOption option, UErrorCode *status){
+    
+    if(status == nullptr || U_FAILURE(*status)){
+        return 0;
+    }
+
+    UnicodeString     stringArray[MAX_SPLIT_STRINGS];
+    RegexPattern      *pattern = RegexPattern::compile(UnicodeString("@"), UREGEX_MULTILINE, *status);
+    UnicodeString src (source, srcLen);
+
+
+    if (U_FAILURE(*status)) {
+        return 0;
+    }
+    int32_t retLen = pattern->split(src, stringArray, MAX_SPLIT_STRINGS, *status);
+    
+    UnicodeString patternString(patternStrings[option]);
+    RegexMatcher matcher(patternString, UREGEX_DOTALL, *status);
+    if (U_FAILURE(*status)) {
+        return 0;
+    } 
+    int32_t count = 0;
+    for(int32_t i=0; i<retLen; i++){
+        matcher.reset(stringArray[i]);
+        if(matcher.lookingAt(*status)){
+            count++;
+        }
+    }
+    if(option == UPC_TRANSLATE && count > 1){
+        fprintf(stderr, "Multiple @translate tags cannot be supported.\n");
+        exit(U_UNSUPPORTED_ERROR);
+    }
+    return count;
+}
+
+U_CFUNC int32_t 
+getAt(const char16_t* source, int32_t srcLen,
+        char16_t** dest, int32_t destCapacity,
+        int32_t index,
+        UParseCommentsOption option,
+        UErrorCode* status){
+
+    if(status == nullptr || U_FAILURE(*status)){
+        return 0;
+    }
+
+    UnicodeString     stringArray[MAX_SPLIT_STRINGS];
+    RegexPattern      *pattern = RegexPattern::compile(UnicodeString("@"), UREGEX_MULTILINE, *status);
+    UnicodeString src (source, srcLen);
+
+
+    if (U_FAILURE(*status)) {
+        return 0;
+    }
+    int32_t retLen = pattern->split(src, stringArray, MAX_SPLIT_STRINGS, *status);
+    
+    UnicodeString patternString(patternStrings[option]);
+    RegexMatcher matcher(patternString, UREGEX_DOTALL, *status);
+    if (U_FAILURE(*status)) {
+        return 0;
+    } 
+    int32_t count = 0;
+    for(int32_t i=0; i<retLen; i++){
+        matcher.reset(stringArray[i]);
+        if(matcher.lookingAt(*status)){
+            if(count == index){
+                UnicodeString out = matcher.group(1, *status);
+                return out.extract(*dest, destCapacity,*status);
+            }
+            count++;
+            
+        }
+    }
+    return 0;
+
+}
+
+U_CFUNC int32_t
+getTranslate( const char16_t* source, int32_t srcLen,
+              char16_t** dest, int32_t destCapacity,
+              UErrorCode* status){
+    UnicodeString     notePatternString("^translate\\s*?(.*)");
+    
+    int32_t destLen = getText(source, srcLen, dest, destCapacity, notePatternString, status);
+    return trim(*dest, destLen, status);
+}
+
+U_CFUNC int32_t 
+getNote(const char16_t* source, int32_t srcLen,
+        char16_t** dest, int32_t destCapacity,
+        UErrorCode* status){
+
+    UnicodeString     notePatternString("^note\\s*?(.*)");
+    int32_t destLen =  getText(source, srcLen, dest, destCapacity, notePatternString, status);
+    return trim(*dest, destLen, status);
+
+}
+
+#endif /* UCONFIG_NO_REGULAR_EXPRESSIONS */
+
diff --git a/intl/icu/source/tools/genrb/prscmnts.h b/intl/icu/source/tools/genrb/prscmnts.h
new file mode 100644
index 0000000000..43195d2d30
--- /dev/null
+++ b/intl/icu/source/tools/genrb/prscmnts.h
@@ -0,0 +1,66 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 1998-2016, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*
+* File read.h
+*
+* Modification History:
+*
+*   Date        Name        Description
+*   05/26/99    stephen     Creation.
+*   5/10/01     Ram         removed ustdio dependency
+*******************************************************************************
+*/
+
+#ifndef PRSCMNTS_H
+#define PRSCMNTS_H 1
+
+#include "unicode/utypes.h"
+
+#if UCONFIG_NO_REGULAR_EXPRESSIONS==0 /* donot compile when no RegularExpressions are available */
+
+enum UParseCommentsOption {
+    UPC_TRANSLATE,
+    UPC_NOTE,
+    UPC_LIMIT
+};
+
+typedef enum UParseCommentsOption UParseCommentsOption;
+
+U_CFUNC int32_t 
+getNote(const UChar* source, int32_t srcLen,
+        UChar** dest, int32_t destCapacity,
+        UErrorCode* status);
+U_CFUNC int32_t 
+removeCmtText(UChar* source, int32_t srcLen, UErrorCode* status);
+
+U_CFUNC int32_t
+getDescription( const UChar* source, int32_t srcLen,
+                UChar** dest, int32_t destCapacity,
+                UErrorCode* status);
+U_CFUNC int32_t
+getTranslate( const UChar* source, int32_t srcLen,
+              UChar** dest, int32_t destCapacity,
+              UErrorCode* status);
+
+U_CFUNC int32_t
+getAt(const UChar* source, int32_t srcLen,
+        UChar** dest, int32_t destCapacity,
+        int32_t index,
+        UParseCommentsOption option,
+        UErrorCode* status);
+
+U_CFUNC int32_t
+getCount(const UChar* source, int32_t srcLen, 
+         UParseCommentsOption option, UErrorCode *status);
+
+#endif /* UCONFIG_NO_REGULAR_EXPRESSIONS */
+
+#endif
+
diff --git a/intl/icu/source/tools/genrb/rbutil.c b/intl/icu/source/tools/genrb/rbutil.c
new file mode 100644
index 0000000000..ed3e66b250
--- /dev/null
+++ b/intl/icu/source/tools/genrb/rbutil.c
@@ -0,0 +1,119 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 1998-2008, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*
+* File util.c
+*
+* Modification History:
+*
+*   Date        Name        Description
+*   06/10/99    stephen     Creation.
+*   02/07/08    Spieth      Correct XLIFF generation on EBCDIC platform
+*   
+*******************************************************************************
+*/
+
+#include "unicode/putil.h"
+#include "rbutil.h"
+#include "cmemory.h"
+#include "cstring.h"
+
+
+/* go from "/usr/local/include/curses.h" to "/usr/local/include" */
+void
+get_dirname(char *dirname,
+            const char *filename)
+{
+  const char *lastSlash = uprv_strrchr(filename, U_FILE_SEP_CHAR);
+  if (lastSlash != NULL) {
+    lastSlash++;
+  }
+
+  if(lastSlash>filename) {
+    uprv_strncpy(dirname, filename, (lastSlash - filename));
+    *(dirname + (lastSlash - filename)) = '\0';
+  } else {
+    *dirname = '\0';
+  }
+}
+
+/* go from "/usr/local/include/curses.h" to "curses" */
+void
+get_basename(char *basename,
+             const char *filename)
+{
+  /* strip off any leading directory portions */
+  const char *lastSlash = uprv_strrchr(filename, U_FILE_SEP_CHAR);
+  if (lastSlash != NULL) {
+    lastSlash++;
+  }
+  char *lastDot;
+
+  if(lastSlash>filename) {
+    uprv_strcpy(basename, lastSlash);
+  } else {
+    uprv_strcpy(basename, filename);
+  }
+
+  /* strip off any suffix */
+  lastDot = uprv_strrchr(basename, '.');
+
+  if(lastDot != NULL) {
+    *lastDot = '\0';
+  }
+}
+
+#define MAX_DIGITS 10
+int32_t 
+itostr(char * buffer, int32_t i, uint32_t radix, int32_t pad)
+{
+    const char digits[16] = {'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};
+    int32_t length = 0;
+    int32_t num = 0;
+    int32_t save = i;
+    int digit;
+    int32_t j;
+    char temp;
+    
+    /* if i is negative make it positive */
+    if(i<0){
+        i=-i;
+    }
+    
+    do{
+        digit = (int)(i % radix);
+        buffer[length++]= digits[digit];
+        i=i/radix;
+    } while(i);
+
+    while (length < pad){
+        buffer[length++] = '0';/*zero padding */
+    }
+    
+    /* if i is negative add the negative sign */
+    if(save < 0){
+        buffer[length++]='-';
+    }
+
+    /* null terminate the buffer */
+    if(length<MAX_DIGITS){
+        buffer[length] =  0x0000;
+    }
+
+    num= (pad>=length) ? pad :length;
+ 
+
+    /* Reverses the string */
+    for (j = 0; j < (num / 2); j++){
+        temp = buffer[(length-1) - j];
+        buffer[(length-1) - j] = buffer[j];
+        buffer[j] = temp;
+    }
+    return length;
+}
diff --git a/intl/icu/source/tools/genrb/rbutil.h b/intl/icu/source/tools/genrb/rbutil.h
new file mode 100644
index 0000000000..9a12c50959
--- /dev/null
+++ b/intl/icu/source/tools/genrb/rbutil.h
@@ -0,0 +1,33 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 1998-2016, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*
+* File rbutil.h
+*
+* Modification History:
+*
+*   Date        Name        Description
+*   06/10/99    stephen     Creation.
+*******************************************************************************
+*/
+
+#ifndef UTIL_H
+#define UTIL_H 1
+
+#include "unicode/utypes.h"
+
+U_CDECL_BEGIN
+
+void get_dirname(char *dirname, const char *filename);
+void get_basename(char *basename, const char *filename);
+int32_t itostr(char * buffer, int32_t i, uint32_t radix, int32_t pad);
+
+U_CDECL_END
+
+#endif /* ! UTIL_H */
diff --git a/intl/icu/source/tools/genrb/read.c b/intl/icu/source/tools/genrb/read.c
new file mode 100644
index 0000000000..0d4a318a89
--- /dev/null
+++ b/intl/icu/source/tools/genrb/read.c
@@ -0,0 +1,479 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 1998-2012, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*
+* File read.c
+*
+* Modification History:
+*
+*   Date        Name        Description
+*   05/26/99    stephen     Creation.
+*   5/10/01     Ram         removed ustdio dependency
+*******************************************************************************
+*/
+
+#include <stdbool.h>
+
+#include "read.h"
+#include "errmsg.h"
+#include "toolutil.h"
+#include "unicode/ustring.h"
+#include "unicode/utf16.h"
+
+#define OPENBRACE    0x007B
+#define CLOSEBRACE   0x007D
+#define COMMA        0x002C
+#define QUOTE        0x0022
+#define ESCAPE       0x005C
+#define SLASH        0x002F
+#define ASTERISK     0x002A
+#define SPACE        0x0020
+#define COLON        0x003A
+#define BADBOM       0xFFFE
+#define CR           0x000D
+#define LF           0x000A
+               
+static int32_t lineCount;
+
+/* Protos */
+static enum ETokenType getStringToken(UCHARBUF *buf,
+                                      UChar32 initialChar,
+                                      struct UString *token,
+                                      UErrorCode *status);
+
+static UChar32 getNextChar           (UCHARBUF *buf, UBool skipwhite, struct UString *token, UErrorCode *status);
+static void    seekUntilNewline      (UCHARBUF *buf, struct UString *token, UErrorCode *status);
+static void    seekUntilEndOfComment (UCHARBUF *buf, struct UString *token, UErrorCode *status);
+static UBool   isWhitespace          (UChar32 c);
+static UBool   isNewline             (UChar32 c);
+
+U_CFUNC void resetLineNumber() {
+    lineCount = 1;
+}
+
+/* Read and return the next token from the stream.  If the token is of
+   type eString, fill in the token parameter with the token.  If the
+   token is eError, then the status parameter will contain the
+   specific error.  This will be eItemNotFound at the end of file,
+   indicating that all tokens have been returned.  This method will
+   never return eString twice in a row; instead, multiple adjacent
+   string tokens will be merged into one, with no intervening
+   space. */
+U_CFUNC enum ETokenType
+getNextToken(UCHARBUF* buf,
+             struct UString *token,
+             uint32_t *linenumber, /* out: linenumber of token */
+             struct UString *comment,
+             UErrorCode *status) {
+    enum ETokenType result;
+    UChar32         c;
+
+    if (U_FAILURE(*status)) {
+        return TOK_ERROR;
+    }
+
+    /* Skip whitespace */
+    c = getNextChar(buf, true, comment, status);
+
+    if (U_FAILURE(*status)) {
+        return TOK_ERROR;
+    }
+
+    *linenumber = lineCount;
+
+    switch(c) {
+    case BADBOM:
+        return TOK_ERROR;
+    case OPENBRACE:
+        return TOK_OPEN_BRACE;
+    case CLOSEBRACE:
+        return TOK_CLOSE_BRACE;
+    case COMMA:
+        return TOK_COMMA;
+    case U_EOF:
+        return TOK_EOF;
+    case COLON:
+        return TOK_COLON;
+
+    default:
+        result = getStringToken(buf, c, token, status);
+    }
+
+    *linenumber = lineCount;
+    return result;
+}
+
+/* Copy a string token into the given UnicodeString.  Upon entry, we
+   have already read the first character of the string token, which is
+   not a whitespace character (but may be a QUOTE or ESCAPE). This
+   function reads all subsequent characters that belong with this
+   string, and copy them into the token parameter. The other
+   important, and slightly convoluted purpose of this function is to
+   merge adjacent strings.  It looks forward a bit, and if the next
+   non comment, non whitespace item is a string, it reads it in as
+   well.  If two adjacent strings are quoted, they are merged without
+   intervening space.  Otherwise a single SPACE character is
+   inserted. */
+static enum ETokenType getStringToken(UCHARBUF* buf,
+                                      UChar32 initialChar,
+                                      struct UString *token,
+                                      UErrorCode *status) {
+    UBool    lastStringWasQuoted;
+    UChar32  c;
+    UChar    target[3] = { '\0' };
+    UChar    *pTarget   = target;
+    int      len=0;
+    UBool    isFollowingCharEscaped=false;
+    UBool    isNLUnescaped = false;
+    UChar32  prevC=0;
+
+    /* We are guaranteed on entry that initialChar is not a whitespace
+       character. If we are at the EOF, or have some other problem, it
+       doesn't matter; we still want to validly return the initialChar
+       (if nothing else) as a string token. */
+
+    if (U_FAILURE(*status)) {
+        return TOK_ERROR;
+    }
+
+    /* setup */
+    lastStringWasQuoted = false;
+    c = initialChar;
+    ustr_setlen(token, 0, status);
+
+    if (U_FAILURE(*status)) {
+        return TOK_ERROR;
+    }
+
+    for (;;) {
+        if (c == QUOTE) {
+            if (!lastStringWasQuoted && token->fLength > 0) {
+                ustr_ucat(token, SPACE, status);
+
+                if (U_FAILURE(*status)) {
+                    return TOK_ERROR;
+                }
+            }
+
+            lastStringWasQuoted = true;
+
+            for (;;) {
+                c = ucbuf_getc(buf,status);
+
+                /* EOF reached */
+                if (c == U_EOF) {
+                    return TOK_EOF;
+                }
+
+                /* Unterminated quoted strings */
+                if (U_FAILURE(*status)) {
+                    return TOK_ERROR;
+                }
+
+                if (c == QUOTE && !isFollowingCharEscaped) {
+                    break;
+                }
+
+                if (c == ESCAPE  && !isFollowingCharEscaped) {
+                    pTarget = target;
+                    c       = unescape(buf, status);
+
+                    if (c == U_ERR) {
+                        return TOK_ERROR;
+                    }
+                    if(c == CR || c == LF){
+                        isNLUnescaped = true;
+                    }
+                }               
+
+                if(c==ESCAPE && !isFollowingCharEscaped){
+                    isFollowingCharEscaped = true;
+                }else{
+                    U_APPEND_CHAR32(c, pTarget,len);
+                    pTarget = target;
+                    ustr_uscat(token, pTarget,len, status);
+                    isFollowingCharEscaped = false;
+                    len=0;
+                    if(c == CR || c == LF){
+                        if(isNLUnescaped == false && prevC!=CR){
+                            lineCount++;
+                        }
+                        isNLUnescaped = false;
+                    }
+                }
+                
+                if (U_FAILURE(*status)) {
+                    return TOK_ERROR;
+                }
+                prevC = c;
+            }
+        } else {
+            if (token->fLength > 0) {
+                ustr_ucat(token, SPACE, status);
+
+                if (U_FAILURE(*status)) {
+                    return TOK_ERROR;
+                }
+            }
+            
+            if(lastStringWasQuoted){
+                if(getShowWarning()){
+                    warning(lineCount, "Mixing quoted and unquoted strings");
+                }
+                if(isStrict()){
+                    return TOK_ERROR;
+                }
+
+            }
+
+            lastStringWasQuoted = false;
+            
+            /* if we reach here we are mixing 
+             * quoted and unquoted strings
+             * warn in normal mode and error in
+             * pedantic mode
+             */
+
+            if (c == ESCAPE) {
+                pTarget = target;
+                c       = unescape(buf, status);
+
+                /* EOF reached */
+                if (c == U_EOF) {
+                    return TOK_ERROR;
+                }
+            }
+
+            U_APPEND_CHAR32(c, pTarget,len);
+            pTarget = target;
+            ustr_uscat(token, pTarget,len, status);
+            len=0;
+            
+            if (U_FAILURE(*status)) {
+                return TOK_ERROR;
+            }
+
+            for (;;) {
+                /* DON'T skip whitespace */
+                c = getNextChar(buf, false, NULL, status);
+
+                /* EOF reached */
+                if (c == U_EOF) {
+                    ucbuf_ungetc(c, buf);
+                    return TOK_STRING;
+                }
+
+                if (U_FAILURE(*status)) {
+                    return TOK_STRING;
+                }
+
+                if (c == QUOTE
+                        || c == OPENBRACE
+                        || c == CLOSEBRACE
+                        || c == COMMA
+                        || c == COLON) {
+                    ucbuf_ungetc(c, buf);
+                    break;
+                }
+
+                if (isWhitespace(c)) {
+                    break;
+                }
+
+                if (c == ESCAPE) {
+                    pTarget = target;
+                    c       = unescape(buf, status);
+
+                    if (c == U_ERR) {
+                        return TOK_ERROR;
+                    }
+                }
+
+                U_APPEND_CHAR32(c, pTarget,len);
+                pTarget = target;
+                ustr_uscat(token, pTarget,len, status);
+                len=0;
+                if (U_FAILURE(*status)) {
+                    return TOK_ERROR;
+                }
+            }
+        }
+
+        /* DO skip whitespace */
+        c = getNextChar(buf, true, NULL, status);
+
+        if (U_FAILURE(*status)) {
+            return TOK_STRING;
+        }
+
+        if (c == OPENBRACE || c == CLOSEBRACE || c == COMMA || c == COLON) {
+            ucbuf_ungetc(c, buf);
+            return TOK_STRING;
+        }
+    }
+}
+
+/* Retrieve the next character.  If skipwhite is
+   true, whitespace is skipped as well. */
+static UChar32 getNextChar(UCHARBUF* buf,
+                           UBool skipwhite,
+                           struct UString *token,
+                           UErrorCode *status) {
+    UChar32 c, c2;
+
+    if (U_FAILURE(*status)) {
+        return U_EOF;
+    }
+
+    for (;;) {
+        c = ucbuf_getc(buf,status);
+
+        if (c == U_EOF) {
+            return U_EOF;
+        }
+
+        if (skipwhite && isWhitespace(c)) {
+            continue;
+        }
+
+        /* This also handles the get() failing case */
+        if (c != SLASH) {
+            return c;
+        }
+
+        c = ucbuf_getc(buf,status); /* "/c" */
+
+        if (c == U_EOF) {
+            return U_EOF;
+        }
+
+        switch (c) {
+        case SLASH:  /* "//" */
+            seekUntilNewline(buf, NULL, status);
+            break;
+
+        case ASTERISK:  /* " / * " */
+            c2 = ucbuf_getc(buf, status); /* "/ * c" */
+            if(c2 == ASTERISK){  /* "/ * *" */
+                /* parse multi-line comment and store it in token*/
+                seekUntilEndOfComment(buf, token, status);
+            } else {
+                ucbuf_ungetc(c2, buf); /* c2 is the non-asterisk following "/ *".  Include c2  back in buffer.  */
+                seekUntilEndOfComment(buf, NULL, status);
+            }
+            break;
+
+        default:
+            ucbuf_ungetc(c, buf); /* "/c" - put back the c */
+            /* If get() failed this is a NOP */
+            return SLASH;
+        }
+
+    }
+}
+
+static void seekUntilNewline(UCHARBUF* buf,
+                             struct UString *token,
+                             UErrorCode *status) {
+    UChar32 c;
+
+    if (U_FAILURE(*status)) {
+        return;
+    }
+
+    do {
+        c = ucbuf_getc(buf,status);
+        /* add the char to token */
+        if(token!=NULL){
+            ustr_u32cat(token, c, status);
+        }
+    } while (!isNewline(c) && c != U_EOF && *status == U_ZERO_ERROR);
+}
+
+static void seekUntilEndOfComment(UCHARBUF *buf,
+                                  struct UString *token,
+                                  UErrorCode *status) {
+    UChar32  c, d;
+    uint32_t line;
+
+    if (U_FAILURE(*status)) {
+        return;
+    }
+
+    line = lineCount;
+
+    do {
+        c = ucbuf_getc(buf, status);
+
+        if (c == ASTERISK) {
+            d = ucbuf_getc(buf, status);
+
+            if (d != SLASH) {
+                ucbuf_ungetc(d, buf);
+            } else {
+                break;
+            }
+        }
+        /* add the char to token */
+        if(token!=NULL){
+            ustr_u32cat(token, c, status);
+        }
+        /* increment the lineCount */
+        isNewline(c);
+
+    } while (c != U_EOF && *status == U_ZERO_ERROR);
+
+    if (c == U_EOF) {
+        *status = U_INVALID_FORMAT_ERROR;
+        error(line, "unterminated comment detected");
+    }
+}
+
+U_CFUNC UChar32 unescape(UCHARBUF *buf, UErrorCode *status) {
+    if (U_FAILURE(*status)) {
+        return U_EOF;
+    }
+
+    /* We expect to be called after the ESCAPE has been seen, but
+     * u_fgetcx needs an ESCAPE to do its magic. */
+    ucbuf_ungetc(ESCAPE, buf);
+
+    return ucbuf_getcx32(buf, status);
+}
+
+static UBool isWhitespace(UChar32 c) {
+    switch (c) {
+        /* ' ', '\t', '\n', '\r', 0x2029, 0xFEFF */
+    case 0x000A:
+    case 0x2029:
+        lineCount++;
+    case 0x000D:
+    case 0x0020:
+    case 0x0009:
+    case 0xFEFF:
+        return true;
+
+    default:
+        return false;
+    }
+}
+
+static UBool isNewline(UChar32 c) {
+    switch (c) {
+        /* '\n', '\r', 0x2029 */
+    case 0x000A:
+    case 0x2029:
+        lineCount++;
+    case 0x000D:
+        return true;
+
+    default:
+        return false;
+    }
+}
diff --git a/intl/icu/source/tools/genrb/read.h b/intl/icu/source/tools/genrb/read.h
new file mode 100644
index 0000000000..e5b8d155da
--- /dev/null
+++ b/intl/icu/source/tools/genrb/read.h
@@ -0,0 +1,54 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 1998-2011, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*
+* File read.h
+*
+* Modification History:
+*
+*   Date        Name        Description
+*   05/26/99    stephen     Creation.
+*   5/10/01     Ram         removed ustdio dependency
+*******************************************************************************
+*/
+
+#ifndef READ_H
+#define READ_H 1
+
+#include "unicode/utypes.h"
+#include "ustr.h"
+#include "ucbuf.h"
+
+/* The types of tokens which may be returned by getNextToken.
+   NOTE: Keep these in sync with tokenNames in parse.c */
+enum ETokenType
+{
+    TOK_STRING,          /* A string token, such as "MonthNames" */
+    TOK_OPEN_BRACE,      /* An opening brace character */
+    TOK_CLOSE_BRACE,     /* A closing brace character */
+    TOK_COMMA,           /* A comma */
+    TOK_COLON,           /* A colon */
+
+    TOK_EOF,             /* End of the file has been reached successfully */
+    TOK_ERROR,           /* An error, such an unterminated quoted string */
+    TOK_TOKEN_COUNT      /* Number of "real" token types */
+};
+
+U_CFUNC UChar32 unescape(UCHARBUF *buf, UErrorCode *status);
+
+U_CFUNC void resetLineNumber(void);
+
+U_CFUNC enum ETokenType
+getNextToken(UCHARBUF *buf,
+             struct UString *token,
+             uint32_t *linenumber, /* out: linenumber of token */
+             struct UString *comment,
+             UErrorCode *status);
+
+#endif
diff --git a/intl/icu/source/tools/genrb/reslist.cpp b/intl/icu/source/tools/genrb/reslist.cpp
new file mode 100644
index 0000000000..e1c2d25061
--- /dev/null
+++ b/intl/icu/source/tools/genrb/reslist.cpp
@@ -0,0 +1,1794 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 2000-2015, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*
+* File reslist.cpp
+*
+* Modification History:
+*
+*   Date        Name        Description
+*   02/21/00    weiv        Creation.
+*******************************************************************************
+*/
+
+// Safer use of UnicodeString.
+#ifndef UNISTR_FROM_CHAR_EXPLICIT
+#   define UNISTR_FROM_CHAR_EXPLICIT explicit
+#endif
+
+// Less important, but still a good idea.
+#ifndef UNISTR_FROM_STRING_EXPLICIT
+#   define UNISTR_FROM_STRING_EXPLICIT explicit
+#endif
+
+#include <assert.h>
+#include <iostream>
+#include <set>
+#include <stdio.h>
+
+#include "unicode/localpointer.h"
+#include "reslist.h"
+#include "unewdata.h"
+#include "unicode/ures.h"
+#include "unicode/putil.h"
+#include "errmsg.h"
+#include "filterrb.h"
+#include "toolutil.h"
+
+#include "uarrsort.h"
+#include "uelement.h"
+#include "uhash.h"
+#include "uinvchar.h"
+#include "ustr_imp.h"
+#include "unicode/utf16.h"
+#include "uassert.h"
+
+/*
+ * Align binary data at a 16-byte offset from the start of the resource bundle,
+ * to be safe for any data type it may contain.
+ */
+#define BIN_ALIGNMENT 16
+
+// This numeric constant must be at least 1.
+// If StringResource.fNumUnitsSaved == 0 then the string occurs only once,
+// and it makes no sense to move it to the pool bundle.
+// The larger the threshold for fNumUnitsSaved
+// the smaller the savings, and the smaller the pool bundle.
+// We trade some total size reduction to reduce the pool bundle a bit,
+// so that one can reasonably save data size by
+// removing bundle files without rebuilding the pool bundle.
+// This can also help to keep the pool and total (pool+local) string indexes
+// within 16 bits, that is, within range of Table16 and Array16 containers.
+#ifndef GENRB_MIN_16BIT_UNITS_SAVED_FOR_POOL_STRING
+#   define GENRB_MIN_16BIT_UNITS_SAVED_FOR_POOL_STRING 10
+#endif
+
+U_NAMESPACE_USE
+
+static UBool gIncludeCopyright = false;
+static UBool gUsePoolBundle = false;
+static UBool gIsDefaultFormatVersion = true;
+static int32_t gFormatVersion = 3;
+
+/* How do we store string values? */
+enum {
+    STRINGS_UTF16_V1,   /* formatVersion 1: int length + UChars + NUL + padding to 4 bytes */
+    STRINGS_UTF16_V2    /* formatVersion 2 & up: optional length in 1..3 UChars + UChars + NUL */
+};
+
+static const int32_t MAX_IMPLICIT_STRING_LENGTH = 40;  /* do not store the length explicitly for such strings */
+
+static const ResFile kNoPoolBundle;
+
+/*
+ * res_none() returns the address of kNoResource,
+ * for use in non-error cases when no resource is to be added to the bundle.
+ * (nullptr is used in error cases.)
+ */
+static SResource kNoResource;  // TODO: const
+
+static UDataInfo dataInfo= {
+    sizeof(UDataInfo),
+    0,
+
+    U_IS_BIG_ENDIAN,
+    U_CHARSET_FAMILY,
+    sizeof(char16_t),
+    0,
+
+    {0x52, 0x65, 0x73, 0x42},     /* dataFormat="ResB" */
+    {1, 3, 0, 0},                 /* formatVersion */
+    {1, 4, 0, 0}                  /* dataVersion take a look at version inside parsed resb*/
+};
+
+static const UVersionInfo gFormatVersions[4] = {  /* indexed by a major-formatVersion integer */
+    { 0, 0, 0, 0 },
+    { 1, 3, 0, 0 },
+    { 2, 0, 0, 0 },
+    { 3, 0, 0, 0 }
+};
+// Remember to update genrb.h GENRB_VERSION when changing the data format.
+// (Or maybe we should remove GENRB_VERSION and report the ICU version number?)
+
+static uint8_t calcPadding(uint32_t size) {
+    /* returns space we need to pad */
+    return (uint8_t) ((size % sizeof(uint32_t)) ? (sizeof(uint32_t) - (size % sizeof(uint32_t))) : 0);
+
+}
+
+void setIncludeCopyright(UBool val){
+    gIncludeCopyright=val;
+}
+
+UBool getIncludeCopyright(){
+    return gIncludeCopyright;
+}
+
+void setFormatVersion(int32_t formatVersion) {
+    gIsDefaultFormatVersion = false;
+    gFormatVersion = formatVersion;
+}
+
+int32_t getFormatVersion() {
+    return gFormatVersion;
+}
+
+void setUsePoolBundle(UBool use) {
+    gUsePoolBundle = use;
+}
+
+// TODO: return const pointer, or find another way to express "none"
+struct SResource* res_none() {
+    return &kNoResource;
+}
+
+SResource::SResource()
+        : fType(URES_NONE), fWritten(false), fRes(RES_BOGUS), fRes16(-1), fKey(-1), fKey16(-1),
+          line(0), fNext(nullptr) {
+    ustr_init(&fComment);
+}
+
+SResource::SResource(SRBRoot *bundle, const char *tag, int8_t type, const UString* comment,
+                     UErrorCode &errorCode)
+        : fType(type), fWritten(false), fRes(RES_BOGUS), fRes16(-1),
+          fKey(bundle != nullptr ? bundle->addTag(tag, errorCode) : -1), fKey16(-1),
+          line(0), fNext(nullptr) {
+    ustr_init(&fComment);
+    if(comment != nullptr) {
+        ustr_cpy(&fComment, comment, &errorCode);
+    }
+}
+
+SResource::~SResource() {
+    ustr_deinit(&fComment);
+}
+
+ContainerResource::~ContainerResource() {
+    SResource *current = fFirst;
+    while (current != nullptr) {
+        SResource *next = current->fNext;
+        delete current;
+        current = next;
+    }
+}
+
+TableResource::~TableResource() {}
+
+// TODO: clarify that containers adopt new items, even in error cases; use LocalPointer
+void TableResource::add(SResource *res, int linenumber, UErrorCode &errorCode) {
+    if (U_FAILURE(errorCode) || res == nullptr || res == &kNoResource) {
+        return;
+    }
+
+    /* remember this linenumber to report to the user if there is a duplicate key */
+    res->line = linenumber;
+
+    /* here we need to traverse the list */
+    ++fCount;
+
+    /* is the list still empty? */
+    if (fFirst == nullptr) {
+        fFirst = res;
+        res->fNext = nullptr;
+        return;
+    }
+
+    const char *resKeyString = fRoot->fKeys + res->fKey;
+
+    SResource *current = fFirst;
+
+    SResource *prev = nullptr;
+    while (current != nullptr) {
+        const char *currentKeyString = fRoot->fKeys + current->fKey;
+        int diff;
+        /*
+         * formatVersion 1: compare key strings in native-charset order
+         * formatVersion 2 and up: compare key strings in ASCII order
+         */
+        if (gFormatVersion == 1 || U_CHARSET_FAMILY == U_ASCII_FAMILY) {
+            diff = uprv_strcmp(currentKeyString, resKeyString);
+        } else {
+            diff = uprv_compareInvCharsAsAscii(currentKeyString, resKeyString);
+        }
+        if (diff < 0) {
+            prev    = current;
+            current = current->fNext;
+        } else if (diff > 0) {
+            /* we're either in front of the list, or in the middle */
+            if (prev == nullptr) {
+                /* front of the list */
+                fFirst = res;
+            } else {
+                /* middle of the list */
+                prev->fNext = res;
+            }
+
+            res->fNext = current;
+            return;
+        } else {
+            /* Key already exists! ERROR! */
+            error(linenumber, "duplicate key '%s' in table, first appeared at line %d", currentKeyString, current->line);
+            errorCode = U_UNSUPPORTED_ERROR;
+            return;
+        }
+    }
+
+    /* end of list */
+    prev->fNext = res;
+    res->fNext  = nullptr;
+}
+
+ArrayResource::~ArrayResource() {}
+
+void ArrayResource::add(SResource *res) {
+    if (res != nullptr && res != &kNoResource) {
+        if (fFirst == nullptr) {
+            fFirst = res;
+        } else {
+            fLast->fNext = res;
+        }
+        fLast = res;
+        ++fCount;
+    }
+}
+
+PseudoListResource::~PseudoListResource() {}
+
+void PseudoListResource::add(SResource *res) {
+    if (res != nullptr && res != &kNoResource) {
+        res->fNext = fFirst;
+        fFirst = res;
+        ++fCount;
+    }
+}
+
+StringBaseResource::StringBaseResource(SRBRoot *bundle, const char *tag, int8_t type,
+                                       const char16_t *value, int32_t len,
+                                       const UString* comment, UErrorCode &errorCode)
+        : SResource(bundle, tag, type, comment, errorCode) {
+    if (len == 0 && gFormatVersion > 1) {
+        fRes = URES_MAKE_EMPTY_RESOURCE(type);
+        fWritten = true;
+        return;
+    }
+
+    fString.setTo(ConstChar16Ptr(value), len);
+    fString.getTerminatedBuffer();  // Some code relies on NUL-termination.
+    if (U_SUCCESS(errorCode) && fString.isBogus()) {
+        errorCode = U_MEMORY_ALLOCATION_ERROR;
+    }
+}
+
+StringBaseResource::StringBaseResource(SRBRoot *bundle, int8_t type,
+                                       const icu::UnicodeString &value, UErrorCode &errorCode)
+        : SResource(bundle, nullptr, type, nullptr, errorCode), fString(value) {
+    if (value.isEmpty() && gFormatVersion > 1) {
+        fRes = URES_MAKE_EMPTY_RESOURCE(type);
+        fWritten = true;
+        return;
+    }
+
+    fString.getTerminatedBuffer();  // Some code relies on NUL-termination.
+    if (U_SUCCESS(errorCode) && fString.isBogus()) {
+        errorCode = U_MEMORY_ALLOCATION_ERROR;
+    }
+}
+
+// Pool bundle string, alias the buffer. Guaranteed NUL-terminated and not empty.
+StringBaseResource::StringBaseResource(int8_t type, const char16_t *value, int32_t len,
+                                       UErrorCode &errorCode)
+        : SResource(nullptr, nullptr, type, nullptr, errorCode), fString(true, value, len) {
+    assert(len > 0);
+    assert(!fString.isBogus());
+}
+
+StringBaseResource::~StringBaseResource() {}
+
+static int32_t U_CALLCONV
+string_hash(const UElement key) {
+    const StringResource *res = static_cast<const StringResource *>(key.pointer);
+    return res->fString.hashCode();
+}
+
+static UBool U_CALLCONV
+string_comp(const UElement key1, const UElement key2) {
+    const StringResource *res1 = static_cast<const StringResource *>(key1.pointer);
+    const StringResource *res2 = static_cast<const StringResource *>(key2.pointer);
+    return res1->fString == res2->fString;
+}
+
+StringResource::~StringResource() {}
+
+AliasResource::~AliasResource() {}
+
+IntResource::IntResource(SRBRoot *bundle, const char *tag, int32_t value,
+                         const UString* comment, UErrorCode &errorCode)
+        : SResource(bundle, tag, URES_INT, comment, errorCode) {
+    fValue = value;
+    fRes = URES_MAKE_RESOURCE(URES_INT, value & RES_MAX_OFFSET);
+    fWritten = true;
+}
+
+IntResource::~IntResource() {}
+
+IntVectorResource::IntVectorResource(SRBRoot *bundle, const char *tag,
+                  const UString* comment, UErrorCode &errorCode)
+        : SResource(bundle, tag, URES_INT_VECTOR, comment, errorCode),
+          fCount(0), fSize(RESLIST_INT_VECTOR_INIT_SIZE),
+          fArray(new uint32_t[fSize]) {
+    if (fArray == nullptr) {
+        errorCode = U_MEMORY_ALLOCATION_ERROR;
+        return;
+    }
+}
+
+IntVectorResource::~IntVectorResource() {
+    delete[] fArray;
+}
+
+void IntVectorResource::add(int32_t value, UErrorCode &errorCode) {
+    if (fCount == fSize) {
+        uint32_t* tmp = new uint32_t[2 * fSize];
+        if (tmp == nullptr) {
+            errorCode = U_MEMORY_ALLOCATION_ERROR;
+            return;
+        }
+        uprv_memcpy(tmp, fArray, fSize * sizeof(uint32_t));
+        delete[] fArray;
+        fArray = tmp;
+        fSize *= 2;
+    }
+    if (U_SUCCESS(errorCode)) {
+        fArray[fCount++] = value;
+    }
+}
+
+BinaryResource::BinaryResource(SRBRoot *bundle, const char *tag,
+                               uint32_t length, uint8_t *data, const char* fileName,
+                               const UString* comment, UErrorCode &errorCode)
+        : SResource(bundle, tag, URES_BINARY, comment, errorCode),
+          fLength(length), fData(nullptr), fFileName(nullptr) {
+    if (U_FAILURE(errorCode)) {
+        return;
+    }
+    if (fileName != nullptr && *fileName != 0){
+        fFileName = new char[uprv_strlen(fileName)+1];
+        if (fFileName == nullptr) {
+            errorCode = U_MEMORY_ALLOCATION_ERROR;
+            return;
+        }
+        uprv_strcpy(fFileName, fileName);
+    }
+    if (length > 0) {
+        fData = new uint8_t[length];
+        if (fData == nullptr) {
+            errorCode = U_MEMORY_ALLOCATION_ERROR;
+            return;
+        }
+        uprv_memcpy(fData, data, length);
+    } else {
+        if (gFormatVersion > 1) {
+            fRes = URES_MAKE_EMPTY_RESOURCE(URES_BINARY);
+            fWritten = true;
+        }
+    }
+}
+
+BinaryResource::~BinaryResource() {
+    delete[] fData;
+    delete[] fFileName;
+}
+
+/* Writing Functions */
+
+void
+StringResource::handlePreflightStrings(SRBRoot *bundle, UHashtable *stringSet,
+                                       UErrorCode &errorCode) {
+    assert(fSame == nullptr);
+    fSame = static_cast<StringResource *>(uhash_get(stringSet, this));
+    if (fSame != nullptr) {
+        // This is a duplicate of a pool bundle string or of an earlier-visited string.
+        if (++fSame->fNumCopies == 1) {
+            assert(fSame->fWritten);
+            int32_t poolStringIndex = (int32_t)RES_GET_OFFSET(fSame->fRes);
+            if (poolStringIndex >= bundle->fPoolStringIndexLimit) {
+                bundle->fPoolStringIndexLimit = poolStringIndex + 1;
+            }
+        }
+        return;
+    }
+    /* Put this string into the set for finding duplicates. */
+    fNumCopies = 1;
+    uhash_put(stringSet, this, this, &errorCode);
+
+    if (bundle->fStringsForm != STRINGS_UTF16_V1) {
+        int32_t len = length();
+        if (len <= MAX_IMPLICIT_STRING_LENGTH &&
+                !U16_IS_TRAIL(fString[0]) && fString.indexOf((char16_t)0) < 0) {
+            /*
+             * This string will be stored without an explicit length.
+             * Runtime will detect !U16_IS_TRAIL(s[0]) and call u_strlen().
+             */
+            fNumCharsForLength = 0;
+        } else if (len <= 0x3ee) {
+            fNumCharsForLength = 1;
+        } else if (len <= 0xfffff) {
+            fNumCharsForLength = 2;
+        } else {
+            fNumCharsForLength = 3;
+        }
+        bundle->f16BitStringsLength += fNumCharsForLength + len + 1;  /* +1 for the NUL */
+    }
+}
+
+void
+ContainerResource::handlePreflightStrings(SRBRoot *bundle, UHashtable *stringSet,
+                                          UErrorCode &errorCode) {
+    for (SResource *current = fFirst; current != nullptr; current = current->fNext) {
+        current->preflightStrings(bundle, stringSet, errorCode);
+    }
+}
+
+void
+SResource::preflightStrings(SRBRoot *bundle, UHashtable *stringSet, UErrorCode &errorCode) {
+    if (U_FAILURE(errorCode)) {
+        return;
+    }
+    if (fRes != RES_BOGUS) {
+        /*
+         * The resource item word was already precomputed, which means
+         * no further data needs to be written.
+         * This might be an integer, or an empty string/binary/etc.
+         */
+        return;
+    }
+    handlePreflightStrings(bundle, stringSet, errorCode);
+}
+
+void
+SResource::handlePreflightStrings(SRBRoot * /*bundle*/, UHashtable * /*stringSet*/,
+                                  UErrorCode & /*errorCode*/) {
+    /* Neither a string nor a container. */
+}
+
+int32_t
+SRBRoot::makeRes16(uint32_t resWord) const {
+    if (resWord == 0) {
+        return 0;  /* empty string */
+    }
+    uint32_t type = RES_GET_TYPE(resWord);
+    int32_t offset = (int32_t)RES_GET_OFFSET(resWord);
+    if (type == URES_STRING_V2) {
+        assert(offset > 0);
+        if (offset < fPoolStringIndexLimit) {
+            if (offset < fPoolStringIndex16Limit) {
+                return offset;
+            }
+        } else {
+            offset = offset - fPoolStringIndexLimit + fPoolStringIndex16Limit;
+            if (offset <= 0xffff) {
+                return offset;
+            }
+        }
+    }
+    return -1;
+}
+
+int32_t
+SRBRoot::mapKey(int32_t oldpos) const {
+    const KeyMapEntry *map = fKeyMap;
+    if (map == nullptr) {
+        return oldpos;
+    }
+    int32_t i, start, limit;
+
+    /* do a binary search for the old, pre-compactKeys() key offset */
+    start = fUsePoolBundle->fKeysCount;
+    limit = start + fKeysCount;
+    while (start < limit - 1) {
+        i = (start + limit) / 2;
+        if (oldpos < map[i].oldpos) {
+            limit = i;
+        } else {
+            start = i;
+        }
+    }
+    assert(oldpos == map[start].oldpos);
+    return map[start].newpos;
+}
+
+/*
+ * Only called for UTF-16 v1 strings and duplicate UTF-16 v2 strings.
+ * For unique UTF-16 v2 strings, write16() sees fRes != RES_BOGUS
+ * and exits early.
+ */
+void
+StringResource::handleWrite16(SRBRoot * /*bundle*/) {
+    SResource *same;
+    if ((same = fSame) != nullptr) {
+        /* This is a duplicate. */
+        assert(same->fRes != RES_BOGUS && same->fWritten);
+        fRes = same->fRes;
+        fWritten = same->fWritten;
+    }
+}
+
+void
+ContainerResource::writeAllRes16(SRBRoot *bundle) {
+    for (SResource *current = fFirst; current != nullptr; current = current->fNext) {
+        bundle->f16BitUnits.append((char16_t)current->fRes16);
+    }
+    fWritten = true;
+}
+
+void
+ArrayResource::handleWrite16(SRBRoot *bundle) {
+    if (fCount == 0 && gFormatVersion > 1) {
+        fRes = URES_MAKE_EMPTY_RESOURCE(URES_ARRAY);
+        fWritten = true;
+        return;
+    }
+
+    int32_t res16 = 0;
+    for (SResource *current = fFirst; current != nullptr; current = current->fNext) {
+        current->write16(bundle);
+        res16 |= current->fRes16;
+    }
+    if (fCount <= 0xffff && res16 >= 0 && gFormatVersion > 1) {
+        fRes = URES_MAKE_RESOURCE(URES_ARRAY16, bundle->f16BitUnits.length());
+        bundle->f16BitUnits.append((char16_t)fCount);
+        writeAllRes16(bundle);
+    }
+}
+
+void
+TableResource::handleWrite16(SRBRoot *bundle) {
+    if (fCount == 0 && gFormatVersion > 1) {
+        fRes = URES_MAKE_EMPTY_RESOURCE(URES_TABLE);
+        fWritten = true;
+        return;
+    }
+    /* Find the smallest table type that fits the data. */
+    int32_t key16 = 0;
+    int32_t res16 = 0;
+    for (SResource *current = fFirst; current != nullptr; current = current->fNext) {
+        current->write16(bundle);
+        key16 |= current->fKey16;
+        res16 |= current->fRes16;
+    }
+    if(fCount > (uint32_t)bundle->fMaxTableLength) {
+        bundle->fMaxTableLength = fCount;
+    }
+    if (fCount <= 0xffff && key16 >= 0) {
+        if (res16 >= 0 && gFormatVersion > 1) {
+            /* 16-bit count, key offsets and values */
+            fRes = URES_MAKE_RESOURCE(URES_TABLE16, bundle->f16BitUnits.length());
+            bundle->f16BitUnits.append((char16_t)fCount);
+            for (SResource *current = fFirst; current != nullptr; current = current->fNext) {
+                bundle->f16BitUnits.append((char16_t)current->fKey16);
+            }
+            writeAllRes16(bundle);
+        } else {
+            /* 16-bit count, 16-bit key offsets, 32-bit values */
+            fTableType = URES_TABLE;
+        }
+    } else {
+        /* 32-bit count, key offsets and values */
+        fTableType = URES_TABLE32;
+    }
+}
+
+void
+PseudoListResource::handleWrite16(SRBRoot * /*bundle*/) {
+    fRes = URES_MAKE_EMPTY_RESOURCE(URES_TABLE);
+    fWritten = true;
+}
+
+void
+SResource::write16(SRBRoot *bundle) {
+    if (fKey >= 0) {
+        // A tagged resource has a non-negative key index into the parsed key strings.
+        // compactKeys() built a map from parsed key index to the final key index.
+        // After the mapping, negative key indexes are used for shared pool bundle keys.
+        fKey = bundle->mapKey(fKey);
+        // If the key index fits into a Key16 for a Table or Table16,
+        // then set the fKey16 field accordingly.
+        // Otherwise keep it at -1.
+        if (fKey >= 0) {
+            if (fKey < bundle->fLocalKeyLimit) {
+                fKey16 = fKey;
+            }
+        } else {
+            int32_t poolKeyIndex = fKey & 0x7fffffff;
+            if (poolKeyIndex <= 0xffff) {
+                poolKeyIndex += bundle->fLocalKeyLimit;
+                if (poolKeyIndex <= 0xffff) {
+                    fKey16 = poolKeyIndex;
+                }
+            }
+        }
+    }
+    /*
+     * fRes != RES_BOGUS:
+     * The resource item word was already precomputed, which means
+     * no further data needs to be written.
+     * This might be an integer, or an empty or UTF-16 v2 string,
+     * an empty binary, etc.
+     */
+    if (fRes == RES_BOGUS) {
+        handleWrite16(bundle);
+    }
+    // Compute fRes16 for precomputed as well as just-computed fRes.
+    fRes16 = bundle->makeRes16(fRes);
+}
+
+void
+SResource::handleWrite16(SRBRoot * /*bundle*/) {
+    /* Only a few resource types write 16-bit units. */
+}
+
+/*
+ * Only called for UTF-16 v1 strings, and for aliases.
+ * For UTF-16 v2 strings, preWrite() sees fRes != RES_BOGUS
+ * and exits early.
+ */
+void
+StringBaseResource::handlePreWrite(uint32_t *byteOffset) {
+    /* Write the UTF-16 v1 string. */
+    fRes = URES_MAKE_RESOURCE(fType, *byteOffset >> 2);
+    *byteOffset += 4 + (length() + 1) * U_SIZEOF_UCHAR;
+}
+
+void
+IntVectorResource::handlePreWrite(uint32_t *byteOffset) {
+    if (fCount == 0 && gFormatVersion > 1) {
+        fRes = URES_MAKE_EMPTY_RESOURCE(URES_INT_VECTOR);
+        fWritten = true;
+    } else {
+        fRes = URES_MAKE_RESOURCE(URES_INT_VECTOR, *byteOffset >> 2);
+        *byteOffset += (1 + fCount) * 4;
+    }
+}
+
+void
+BinaryResource::handlePreWrite(uint32_t *byteOffset) {
+    uint32_t pad       = 0;
+    uint32_t dataStart = *byteOffset + sizeof(fLength);
+
+    if (dataStart % BIN_ALIGNMENT) {
+        pad = (BIN_ALIGNMENT - dataStart % BIN_ALIGNMENT);
+        *byteOffset += pad;  /* pad == 4 or 8 or 12 */
+    }
+    fRes = URES_MAKE_RESOURCE(URES_BINARY, *byteOffset >> 2);
+    *byteOffset += 4 + fLength;
+}
+
+void
+ContainerResource::preWriteAllRes(uint32_t *byteOffset) {
+    for (SResource *current = fFirst; current != nullptr; current = current->fNext) {
+        current->preWrite(byteOffset);
+    }
+}
+
+void
+ArrayResource::handlePreWrite(uint32_t *byteOffset) {
+    preWriteAllRes(byteOffset);
+    fRes = URES_MAKE_RESOURCE(URES_ARRAY, *byteOffset >> 2);
+    *byteOffset += (1 + fCount) * 4;
+}
+
+void
+TableResource::handlePreWrite(uint32_t *byteOffset) {
+    preWriteAllRes(byteOffset);
+    if (fTableType == URES_TABLE) {
+        /* 16-bit count, 16-bit key offsets, 32-bit values */
+        fRes = URES_MAKE_RESOURCE(URES_TABLE, *byteOffset >> 2);
+        *byteOffset += 2 + fCount * 6;
+    } else {
+        /* 32-bit count, key offsets and values */
+        fRes = URES_MAKE_RESOURCE(URES_TABLE32, *byteOffset >> 2);
+        *byteOffset += 4 + fCount * 8;
+    }
+}
+
+void
+SResource::preWrite(uint32_t *byteOffset) {
+    if (fRes != RES_BOGUS) {
+        /*
+         * The resource item word was already precomputed, which means
+         * no further data needs to be written.
+         * This might be an integer, or an empty or UTF-16 v2 string,
+         * an empty binary, etc.
+         */
+        return;
+    }
+    handlePreWrite(byteOffset);
+    *byteOffset += calcPadding(*byteOffset);
+}
+
+void
+SResource::handlePreWrite(uint32_t * /*byteOffset*/) {
+    assert(false);
+}
+
+/*
+ * Only called for UTF-16 v1 strings, and for aliases. For UTF-16 v2 strings,
+ * write() sees fWritten and exits early.
+ */
+void
+StringBaseResource::handleWrite(UNewDataMemory *mem, uint32_t *byteOffset) {
+    /* Write the UTF-16 v1 string. */
+    int32_t len = length();
+    udata_write32(mem, len);
+    udata_writeUString(mem, getBuffer(), len + 1);
+    *byteOffset += 4 + (len + 1) * U_SIZEOF_UCHAR;
+    fWritten = true;
+}
+
+void
+ContainerResource::writeAllRes(UNewDataMemory *mem, uint32_t *byteOffset) {
+    uint32_t i = 0;
+    for (SResource *current = fFirst; current != nullptr; ++i, current = current->fNext) {
+        current->write(mem, byteOffset);
+    }
+    assert(i == fCount);
+}
+
+void
+ContainerResource::writeAllRes32(UNewDataMemory *mem, uint32_t *byteOffset) {
+    for (SResource *current = fFirst; current != nullptr; current = current->fNext) {
+        udata_write32(mem, current->fRes);
+    }
+    *byteOffset += fCount * 4;
+}
+
+void
+ArrayResource::handleWrite(UNewDataMemory *mem, uint32_t *byteOffset) {
+    writeAllRes(mem, byteOffset);
+    udata_write32(mem, fCount);
+    *byteOffset += 4;
+    writeAllRes32(mem, byteOffset);
+}
+
+void
+IntVectorResource::handleWrite(UNewDataMemory *mem, uint32_t *byteOffset) {
+    udata_write32(mem, fCount);
+    for(uint32_t i = 0; i < fCount; ++i) {
+      udata_write32(mem, fArray[i]);
+    }
+    *byteOffset += (1 + fCount) * 4;
+}
+
+void
+BinaryResource::handleWrite(UNewDataMemory *mem, uint32_t *byteOffset) {
+    uint32_t pad       = 0;
+    uint32_t dataStart = *byteOffset + sizeof(fLength);
+
+    if (dataStart % BIN_ALIGNMENT) {
+        pad = (BIN_ALIGNMENT - dataStart % BIN_ALIGNMENT);
+        udata_writePadding(mem, pad);  /* pad == 4 or 8 or 12 */
+        *byteOffset += pad;
+    }
+
+    udata_write32(mem, fLength);
+    if (fLength > 0) {
+        udata_writeBlock(mem, fData, fLength);
+    }
+    *byteOffset += 4 + fLength;
+}
+
+void
+TableResource::handleWrite(UNewDataMemory *mem, uint32_t *byteOffset) {
+    writeAllRes(mem, byteOffset);
+    if(fTableType == URES_TABLE) {
+        udata_write16(mem, (uint16_t)fCount);
+        for (SResource *current = fFirst; current != nullptr; current = current->fNext) {
+            udata_write16(mem, current->fKey16);
+        }
+        *byteOffset += (1 + fCount)* 2;
+        if ((fCount & 1) == 0) {
+            /* 16-bit count and even number of 16-bit key offsets need padding before 32-bit resource items */
+            udata_writePadding(mem, 2);
+            *byteOffset += 2;
+        }
+    } else /* URES_TABLE32 */ {
+        udata_write32(mem, fCount);
+        for (SResource *current = fFirst; current != nullptr; current = current->fNext) {
+            udata_write32(mem, (uint32_t)current->fKey);
+        }
+        *byteOffset += (1 + fCount)* 4;
+    }
+    writeAllRes32(mem, byteOffset);
+}
+
+void
+SResource::write(UNewDataMemory *mem, uint32_t *byteOffset) {
+    if (fWritten) {
+        assert(fRes != RES_BOGUS);
+        return;
+    }
+    handleWrite(mem, byteOffset);
+    uint8_t paddingSize = calcPadding(*byteOffset);
+    if (paddingSize > 0) {
+        udata_writePadding(mem, paddingSize);
+        *byteOffset += paddingSize;
+    }
+    fWritten = true;
+}
+
+void
+SResource::handleWrite(UNewDataMemory * /*mem*/, uint32_t * /*byteOffset*/) {
+    assert(false);
+}
+
+void SRBRoot::write(const char *outputDir, const char *outputPkg,
+                    char *writtenFilename, int writtenFilenameLen,
+                    UErrorCode &errorCode) {
+    UNewDataMemory *mem        = nullptr;
+    uint32_t        byteOffset = 0;
+    uint32_t        top, size;
+    char            dataName[1024];
+    int32_t         indexes[URES_INDEX_TOP];
+
+    compactKeys(errorCode);
+    /*
+     * Add padding bytes to fKeys so that fKeysTop is 4-aligned.
+     * Safe because the capacity is a multiple of 4.
+     */
+    while (fKeysTop & 3) {
+        fKeys[fKeysTop++] = (char)0xaa;
+    }
+    /*
+     * In URES_TABLE, use all local key offsets that fit into 16 bits,
+     * and use the remaining 16-bit offsets for pool key offsets
+     * if there are any.
+     * If there are no local keys, then use the whole 16-bit space
+     * for pool key offsets.
+     * Note: This cannot be changed without changing the major formatVersion.
+     */
+    if (fKeysBottom < fKeysTop) {
+        if (fKeysTop <= 0x10000) {
+            fLocalKeyLimit = fKeysTop;
+        } else {
+            fLocalKeyLimit = 0x10000;
+        }
+    } else {
+        fLocalKeyLimit = 0;
+    }
+
+    UHashtable *stringSet;
+    if (gFormatVersion > 1) {
+        stringSet = uhash_open(string_hash, string_comp, string_comp, &errorCode);
+        if (U_SUCCESS(errorCode) &&
+                fUsePoolBundle != nullptr && fUsePoolBundle->fStrings != nullptr) {
+            for (SResource *current = fUsePoolBundle->fStrings->fFirst;
+                    current != nullptr;
+                    current = current->fNext) {
+                StringResource *sr = static_cast<StringResource *>(current);
+                sr->fNumCopies = 0;
+                sr->fNumUnitsSaved = 0;
+                uhash_put(stringSet, sr, sr, &errorCode);
+            }
+        }
+        fRoot->preflightStrings(this, stringSet, errorCode);
+    } else {
+        stringSet = nullptr;
+    }
+    if (fStringsForm == STRINGS_UTF16_V2 && f16BitStringsLength > 0) {
+        compactStringsV2(stringSet, errorCode);
+    }
+    uhash_close(stringSet);
+    if (U_FAILURE(errorCode)) {
+        return;
+    }
+
+    int32_t formatVersion = gFormatVersion;
+    if (fPoolStringIndexLimit != 0) {
+        int32_t sum = fPoolStringIndexLimit + fLocalStringIndexLimit;
+        if ((sum - 1) > RES_MAX_OFFSET) {
+            errorCode = U_BUFFER_OVERFLOW_ERROR;
+            return;
+        }
+        if (fPoolStringIndexLimit < 0x10000 && sum <= 0x10000) {
+            // 16-bit indexes work for all pool + local strings.
+            fPoolStringIndex16Limit = fPoolStringIndexLimit;
+        } else {
+            // Set the pool index threshold so that 16-bit indexes work
+            // for some pool strings and some local strings.
+            fPoolStringIndex16Limit = (int32_t)(
+                    ((int64_t)fPoolStringIndexLimit * 0xffff) / sum);
+        }
+    } else if (gIsDefaultFormatVersion && formatVersion == 3 && !fIsPoolBundle) {
+        // If we just default to formatVersion 3
+        // but there are no pool bundle strings to share
+        // and we do not write a pool bundle,
+        // then write formatVersion 2 which is just as good.
+        formatVersion = 2;
+    }
+
+    fRoot->write16(this);
+    if (f16BitUnits.isBogus()) {
+        errorCode = U_MEMORY_ALLOCATION_ERROR;
+        return;
+    }
+    if (f16BitUnits.length() & 1) {
+        f16BitUnits.append((char16_t)0xaaaa);  /* pad to multiple of 4 bytes */
+    }
+
+    byteOffset = fKeysTop + f16BitUnits.length() * 2;
+    fRoot->preWrite(&byteOffset);
+
+    /* total size including the root item */
+    top = byteOffset;
+
+    if (writtenFilename && writtenFilenameLen) {
+        *writtenFilename = 0;
+    }
+
+    if (writtenFilename) {
+       int32_t off = 0, len = 0;
+       if (outputDir) {
+           uprv_strncpy(writtenFilename, outputDir, writtenFilenameLen);
+       }
+       if (writtenFilenameLen -= len) {
+           off += len;
+           writtenFilename[off] = U_FILE_SEP_CHAR;
+           if (--writtenFilenameLen) {
+               ++off;
+               if(outputPkg != nullptr)
+               {
+                   uprv_strcpy(writtenFilename+off, outputPkg);
+                   off += (int32_t)uprv_strlen(outputPkg);
+                   writtenFilename[off] = '_';
+                   ++off;
+               }
+
+               len = (int32_t)uprv_strlen(fLocale);
+               if (len > writtenFilenameLen) {
+                   len = writtenFilenameLen;
+               }
+               uprv_strncpy(writtenFilename + off, fLocale, writtenFilenameLen - off);
+               if (writtenFilenameLen -= len) {
+                   off += len;
+                   uprv_strncpy(writtenFilename +  off, ".res", writtenFilenameLen - off);
+               }
+           }
+       }
+    }
+
+    if(outputPkg)
+    {
+        uprv_strcpy(dataName, outputPkg);
+        uprv_strcat(dataName, "_");
+        uprv_strcat(dataName, fLocale);
+    }
+    else
+    {
+        uprv_strcpy(dataName, fLocale);
+    }
+
+    uprv_memcpy(dataInfo.formatVersion, gFormatVersions + formatVersion, sizeof(UVersionInfo));
+
+    mem = udata_create(outputDir, "res", dataName,
+                       &dataInfo, (gIncludeCopyright==true)? U_COPYRIGHT_STRING:nullptr, &errorCode);
+    if(U_FAILURE(errorCode)){
+        return;
+    }
+
+    /* write the root item */
+    udata_write32(mem, fRoot->fRes);
+
+    /*
+     * formatVersion 1.1 (ICU 2.8):
+     * write int32_t indexes[] after root and before the key strings
+     * to make it easier to parse resource bundles in icuswap or from Java etc.
+     */
+    uprv_memset(indexes, 0, sizeof(indexes));
+    indexes[URES_INDEX_LENGTH]=             fIndexLength;
+    indexes[URES_INDEX_KEYS_TOP]=           fKeysTop>>2;
+    indexes[URES_INDEX_RESOURCES_TOP]=      (int32_t)(top>>2);
+    indexes[URES_INDEX_BUNDLE_TOP]=         indexes[URES_INDEX_RESOURCES_TOP];
+    indexes[URES_INDEX_MAX_TABLE_LENGTH]=   fMaxTableLength;
+
+    /*
+     * formatVersion 1.2 (ICU 3.6):
+     * write indexes[URES_INDEX_ATTRIBUTES] with URES_ATT_NO_FALLBACK set or not set
+     * the memset() above initialized all indexes[] to 0
+     */
+    if (fNoFallback) {
+        indexes[URES_INDEX_ATTRIBUTES]=URES_ATT_NO_FALLBACK;
+    }
+    /*
+     * formatVersion 2.0 (ICU 4.4):
+     * more compact string value storage, optional pool bundle
+     */
+    if (URES_INDEX_16BIT_TOP < fIndexLength) {
+        indexes[URES_INDEX_16BIT_TOP] = (fKeysTop>>2) + (f16BitUnits.length()>>1);
+    }
+    if (URES_INDEX_POOL_CHECKSUM < fIndexLength) {
+        if (fIsPoolBundle) {
+            indexes[URES_INDEX_ATTRIBUTES] |= URES_ATT_IS_POOL_BUNDLE | URES_ATT_NO_FALLBACK;
+            uint32_t checksum = computeCRC((const char *)(fKeys + fKeysBottom),
+                                           (uint32_t)(fKeysTop - fKeysBottom), 0);
+            if (f16BitUnits.length() <= 1) {
+                // no pool strings to checksum
+            } else if (U_IS_BIG_ENDIAN) {
+                checksum = computeCRC(reinterpret_cast<const char *>(f16BitUnits.getBuffer()),
+                                      (uint32_t)f16BitUnits.length() * 2, checksum);
+            } else {
+                // Swap to big-endian so we get the same checksum on all platforms
+                // (except for charset family, due to the key strings).
+                UnicodeString s(f16BitUnits);
+                assert(!s.isBogus());
+                // .getBuffer(capacity) returns a mutable buffer
+                char16_t* p = s.getBuffer(f16BitUnits.length());
+                for (int32_t count = f16BitUnits.length(); count > 0; --count) {
+                    uint16_t x = *p;
+                    *p++ = (uint16_t)((x << 8) | (x >> 8));
+                }
+                s.releaseBuffer(f16BitUnits.length());
+                checksum = computeCRC((const char *)s.getBuffer(),
+                                      (uint32_t)f16BitUnits.length() * 2, checksum);
+            }
+            indexes[URES_INDEX_POOL_CHECKSUM] = (int32_t)checksum;
+        } else if (gUsePoolBundle) {
+            indexes[URES_INDEX_ATTRIBUTES] |= URES_ATT_USES_POOL_BUNDLE;
+            indexes[URES_INDEX_POOL_CHECKSUM] = fUsePoolBundle->fChecksum;
+        }
+    }
+    // formatVersion 3 (ICU 56):
+    // share string values via pool bundle strings
+    indexes[URES_INDEX_LENGTH] |= fPoolStringIndexLimit << 8;  // bits 23..0 -> 31..8
+    indexes[URES_INDEX_ATTRIBUTES] |= (fPoolStringIndexLimit >> 12) & 0xf000;  // bits 27..24 -> 15..12
+    indexes[URES_INDEX_ATTRIBUTES] |= fPoolStringIndex16Limit << 16;
+
+    /* write the indexes[] */
+    udata_writeBlock(mem, indexes, fIndexLength*4);
+
+    /* write the table key strings */
+    udata_writeBlock(mem, fKeys+fKeysBottom,
+                          fKeysTop-fKeysBottom);
+
+    /* write the v2 UTF-16 strings, URES_TABLE16 and URES_ARRAY16 */
+    udata_writeBlock(mem, f16BitUnits.getBuffer(), f16BitUnits.length()*2);
+
+    /* write all of the bundle contents: the root item and its children */
+    byteOffset = fKeysTop + f16BitUnits.length() * 2;
+    fRoot->write(mem, &byteOffset);
+    assert(byteOffset == top);
+
+    size = udata_finish(mem, &errorCode);
+    if(top != size) {
+        fprintf(stderr, "genrb error: wrote %u bytes but counted %u\n",
+                (int)size, (int)top);
+        errorCode = U_INTERNAL_PROGRAM_ERROR;
+    }
+}
+
+/* Opening Functions */
+
+TableResource* table_open(struct SRBRoot *bundle, const char *tag, const struct UString* comment, UErrorCode *status) {
+    LocalPointer<TableResource> res(new TableResource(bundle, tag, comment, *status), *status);
+    return U_SUCCESS(*status) ? res.orphan() : nullptr;
+}
+
+ArrayResource* array_open(struct SRBRoot *bundle, const char *tag, const struct UString* comment, UErrorCode *status) {
+    LocalPointer<ArrayResource> res(new ArrayResource(bundle, tag, comment, *status), *status);
+    return U_SUCCESS(*status) ? res.orphan() : nullptr;
+}
+
+struct SResource *string_open(struct SRBRoot *bundle, const char *tag, const char16_t *value, int32_t len, const struct UString* comment, UErrorCode *status) {
+    LocalPointer<SResource> res(
+            new StringResource(bundle, tag, value, len, comment, *status), *status);
+    return U_SUCCESS(*status) ? res.orphan() : nullptr;
+}
+
+struct SResource *alias_open(struct SRBRoot *bundle, const char *tag, char16_t *value, int32_t len, const struct UString* comment, UErrorCode *status) {
+    LocalPointer<SResource> res(
+            new AliasResource(bundle, tag, value, len, comment, *status), *status);
+    return U_SUCCESS(*status) ? res.orphan() : nullptr;
+}
+
+IntVectorResource *intvector_open(struct SRBRoot *bundle, const char *tag, const struct UString* comment, UErrorCode *status) {
+    LocalPointer<IntVectorResource> res(
+            new IntVectorResource(bundle, tag, comment, *status), *status);
+    return U_SUCCESS(*status) ? res.orphan() : nullptr;
+}
+
+struct SResource *int_open(struct SRBRoot *bundle, const char *tag, int32_t value, const struct UString* comment, UErrorCode *status) {
+    LocalPointer<SResource> res(new IntResource(bundle, tag, value, comment, *status), *status);
+    return U_SUCCESS(*status) ? res.orphan() : nullptr;
+}
+
+struct SResource *bin_open(struct SRBRoot *bundle, const char *tag, uint32_t length, uint8_t *data, const char* fileName, const struct UString* comment, UErrorCode *status) {
+    LocalPointer<SResource> res(
+            new BinaryResource(bundle, tag, length, data, fileName, comment, *status), *status);
+    return U_SUCCESS(*status) ? res.orphan() : nullptr;
+}
+
+SRBRoot::SRBRoot(const UString *comment, UBool isPoolBundle, UErrorCode &errorCode)
+        : fRoot(nullptr), fLocale(nullptr), fIndexLength(0), fMaxTableLength(0), fNoFallback(false),
+          fStringsForm(STRINGS_UTF16_V1), fIsPoolBundle(isPoolBundle),
+          fKeys(nullptr), fKeyMap(nullptr),
+          fKeysBottom(0), fKeysTop(0), fKeysCapacity(0),
+          fKeysCount(0), fLocalKeyLimit(0),
+          f16BitUnits(), f16BitStringsLength(0),
+          fUsePoolBundle(&kNoPoolBundle),
+          fPoolStringIndexLimit(0), fPoolStringIndex16Limit(0), fLocalStringIndexLimit(0),
+          fWritePoolBundle(nullptr) {
+    if (U_FAILURE(errorCode)) {
+        return;
+    }
+
+    if (gFormatVersion > 1) {
+        // f16BitUnits must start with a zero for empty resources.
+        // We might be able to omit it if there are no empty 16-bit resources.
+        f16BitUnits.append((char16_t)0);
+    }
+
+    fKeys = (char *) uprv_malloc(sizeof(char) * KEY_SPACE_SIZE);
+    if (isPoolBundle) {
+        fRoot = new PseudoListResource(this, errorCode);
+    } else {
+        fRoot = new TableResource(this, nullptr, comment, errorCode);
+    }
+    if (fKeys == nullptr || fRoot == nullptr || U_FAILURE(errorCode)) {
+        if (U_SUCCESS(errorCode)) {
+            errorCode = U_MEMORY_ALLOCATION_ERROR;
+        }
+        return;
+    }
+
+    fKeysCapacity = KEY_SPACE_SIZE;
+    /* formatVersion 1.1 and up: start fKeysTop after the root item and indexes[] */
+    if (gUsePoolBundle || isPoolBundle) {
+        fIndexLength = URES_INDEX_POOL_CHECKSUM + 1;
+    } else if (gFormatVersion >= 2) {
+        fIndexLength = URES_INDEX_16BIT_TOP + 1;
+    } else /* formatVersion 1 */ {
+        fIndexLength = URES_INDEX_ATTRIBUTES + 1;
+    }
+    fKeysBottom = (1 /* root */ + fIndexLength) * 4;
+    uprv_memset(fKeys, 0, fKeysBottom);
+    fKeysTop = fKeysBottom;
+
+    if (gFormatVersion == 1) {
+        fStringsForm = STRINGS_UTF16_V1;
+    } else {
+        fStringsForm = STRINGS_UTF16_V2;
+    }
+}
+
+/* Closing Functions */
+
+void res_close(struct SResource *res) {
+    delete res;
+}
+
+SRBRoot::~SRBRoot() {
+    delete fRoot;
+    uprv_free(fLocale);
+    uprv_free(fKeys);
+    uprv_free(fKeyMap);
+}
+
+/* Misc Functions */
+
+void SRBRoot::setLocale(char16_t *locale, UErrorCode &errorCode) {
+    if(U_FAILURE(errorCode)) {
+        return;
+    }
+
+    uprv_free(fLocale);
+    fLocale = (char*) uprv_malloc(sizeof(char) * (u_strlen(locale)+1));
+    if(fLocale == nullptr) {
+        errorCode = U_MEMORY_ALLOCATION_ERROR;
+        return;
+    }
+
+    u_UCharsToChars(locale, fLocale, u_strlen(locale)+1);
+}
+
+const char *
+SRBRoot::getKeyString(int32_t key) const {
+    if (key < 0) {
+        return fUsePoolBundle->fKeys + (key & 0x7fffffff);
+    } else {
+        return fKeys + key;
+    }
+}
+
+const char *
+SResource::getKeyString(const SRBRoot *bundle) const {
+    if (fKey == -1) {
+        return nullptr;
+    }
+    return bundle->getKeyString(fKey);
+}
+
+const char *
+SRBRoot::getKeyBytes(int32_t *pLength) const {
+    *pLength = fKeysTop - fKeysBottom;
+    return fKeys + fKeysBottom;
+}
+
+int32_t
+SRBRoot::addKeyBytes(const char *keyBytes, int32_t length, UErrorCode &errorCode) {
+    int32_t keypos;
+
+    // It is not legal to add new key bytes after compactKeys is run!
+    U_ASSERT(fKeyMap == nullptr);
+
+    if (U_FAILURE(errorCode)) {
+        return -1;
+    }
+    if (length < 0 || (keyBytes == nullptr && length != 0)) {
+        errorCode = U_ILLEGAL_ARGUMENT_ERROR;
+        return -1;
+    }
+    if (length == 0) {
+        return fKeysTop;
+    }
+
+    keypos = fKeysTop;
+    fKeysTop += length;
+    if (fKeysTop >= fKeysCapacity) {
+        /* overflow - resize the keys buffer */
+        fKeysCapacity += KEY_SPACE_SIZE;
+        fKeys = static_cast<char *>(uprv_realloc(fKeys, fKeysCapacity));
+        if(fKeys == nullptr) {
+            errorCode = U_MEMORY_ALLOCATION_ERROR;
+            return -1;
+        }
+    }
+
+    uprv_memcpy(fKeys + keypos, keyBytes, length);
+
+    return keypos;
+}
+
+int32_t
+SRBRoot::addTag(const char *tag, UErrorCode &errorCode) {
+    int32_t keypos;
+
+    if (U_FAILURE(errorCode)) {
+        return -1;
+    }
+
+    if (tag == nullptr) {
+        /* no error: the root table and array items have no keys */
+        return -1;
+    }
+
+    keypos = addKeyBytes(tag, (int32_t)(uprv_strlen(tag) + 1), errorCode);
+    if (U_SUCCESS(errorCode)) {
+        ++fKeysCount;
+    }
+    return keypos;
+}
+
+static int32_t
+compareInt32(int32_t lPos, int32_t rPos) {
+    /*
+     * Compare possibly-negative key offsets. Don't just return lPos - rPos
+     * because that is prone to negative-integer underflows.
+     */
+    if (lPos < rPos) {
+        return -1;
+    } else if (lPos > rPos) {
+        return 1;
+    } else {
+        return 0;
+    }
+}
+
+static int32_t U_CALLCONV
+compareKeySuffixes(const void *context, const void *l, const void *r) {
+    const struct SRBRoot *bundle=(const struct SRBRoot *)context;
+    int32_t lPos = ((const KeyMapEntry *)l)->oldpos;
+    int32_t rPos = ((const KeyMapEntry *)r)->oldpos;
+    const char *lStart = bundle->getKeyString(lPos);
+    const char *lLimit = lStart;
+    const char *rStart = bundle->getKeyString(rPos);
+    const char *rLimit = rStart;
+    int32_t diff;
+    while (*lLimit != 0) { ++lLimit; }
+    while (*rLimit != 0) { ++rLimit; }
+    /* compare keys in reverse character order */
+    while (lStart < lLimit && rStart < rLimit) {
+        diff = (int32_t)(uint8_t)*--lLimit - (int32_t)(uint8_t)*--rLimit;
+        if (diff != 0) {
+            return diff;
+        }
+    }
+    /* sort equal suffixes by descending key length */
+    diff = (int32_t)(rLimit - rStart) - (int32_t)(lLimit - lStart);
+    if (diff != 0) {
+        return diff;
+    }
+    /* Sort pool bundle keys first (negative oldpos), and otherwise keys in parsing order. */
+    return compareInt32(lPos, rPos);
+}
+
+static int32_t U_CALLCONV
+compareKeyNewpos(const void * /*context*/, const void *l, const void *r) {
+    return compareInt32(((const KeyMapEntry *)l)->newpos, ((const KeyMapEntry *)r)->newpos);
+}
+
+static int32_t U_CALLCONV
+compareKeyOldpos(const void * /*context*/, const void *l, const void *r) {
+    return compareInt32(((const KeyMapEntry *)l)->oldpos, ((const KeyMapEntry *)r)->oldpos);
+}
+
+void SResource::collectKeys(std::function<void(int32_t)> collector) const {
+    collector(fKey);
+}
+
+void ContainerResource::collectKeys(std::function<void(int32_t)> collector) const {
+    collector(fKey);
+    for (SResource* curr = fFirst; curr != nullptr; curr = curr->fNext) {
+        curr->collectKeys(collector);
+    }
+}
+
+void
+SRBRoot::compactKeys(UErrorCode &errorCode) {
+    KeyMapEntry *map;
+    char *keys;
+    int32_t i;
+
+    // Except for pool bundles, keys might not be used.
+    // Do not add unused keys to the final bundle.
+    std::set<int32_t> keysInUse;
+    if (!fIsPoolBundle) {
+        fRoot->collectKeys([&keysInUse](int32_t key) {
+            if (key >= 0) {
+                keysInUse.insert(key);
+            }
+        });
+        fKeysCount = static_cast<int32_t>(keysInUse.size());
+    }
+
+    int32_t keysCount = fUsePoolBundle->fKeysCount + fKeysCount;
+    if (U_FAILURE(errorCode) || fKeyMap != nullptr) {
+        return;
+    }
+    map = (KeyMapEntry *)uprv_malloc(keysCount * sizeof(KeyMapEntry));
+    if (map == nullptr) {
+        errorCode = U_MEMORY_ALLOCATION_ERROR;
+        return;
+    }
+    keys = (char *)fUsePoolBundle->fKeys;
+    for (i = 0; i < fUsePoolBundle->fKeysCount; ++i) {
+        map[i].oldpos =
+            (int32_t)(keys - fUsePoolBundle->fKeys) | 0x80000000;  /* negative oldpos */
+        map[i].newpos = 0;
+        while (*keys != 0) { ++keys; }  /* skip the key */
+        ++keys;  /* skip the NUL */
+    }
+    keys = fKeys + fKeysBottom;
+    while (i < keysCount) {
+        int32_t keyOffset = static_cast<int32_t>(keys - fKeys);
+        if (!fIsPoolBundle && keysInUse.count(keyOffset) == 0) {
+            // Mark the unused key as deleted
+            while (*keys != 0) { *keys++ = 1; }
+            *keys++ = 1;
+        } else {
+            map[i].oldpos = keyOffset;
+            map[i].newpos = 0;
+            while (*keys != 0) { ++keys; }  /* skip the key */
+            ++keys;  /* skip the NUL */
+            i++;
+        }
+    }
+    if (keys != fKeys + fKeysTop) {
+        // Throw away any unused keys from the end
+        fKeysTop = static_cast<int32_t>(keys - fKeys);
+    }
+    /* Sort the keys so that each one is immediately followed by all of its suffixes. */
+    uprv_sortArray(map, keysCount, (int32_t)sizeof(KeyMapEntry),
+                   compareKeySuffixes, this, false, &errorCode);
+    /*
+     * Make suffixes point into earlier, longer strings that contain them
+     * and mark the old, now unused suffix bytes as deleted.
+     */
+    if (U_SUCCESS(errorCode)) {
+        keys = fKeys;
+        for (i = 0; i < keysCount;) {
+            /*
+             * This key is not a suffix of the previous one;
+             * keep this one and delete the following ones that are
+             * suffixes of this one.
+             */
+            const char *key;
+            const char *keyLimit;
+            int32_t j = i + 1;
+            map[i].newpos = map[i].oldpos;
+            if (j < keysCount && map[j].oldpos < 0) {
+                /* Key string from the pool bundle, do not delete. */
+                i = j;
+                continue;
+            }
+            key = getKeyString(map[i].oldpos);
+            for (keyLimit = key; *keyLimit != 0; ++keyLimit) {}
+            for (; j < keysCount && map[j].oldpos >= 0; ++j) {
+                const char *k;
+                char *suffix;
+                const char *suffixLimit;
+                int32_t offset;
+                suffix = keys + map[j].oldpos;
+                for (suffixLimit = suffix; *suffixLimit != 0; ++suffixLimit) {}
+                offset = static_cast<int32_t>((keyLimit - key) - (suffixLimit - suffix));
+                if (offset < 0) {
+                    break;  /* suffix cannot be longer than the original */
+                }
+                /* Is it a suffix of the earlier, longer key? */
+                for (k = keyLimit; suffix < suffixLimit && *--k == *--suffixLimit;) {}
+                if (suffix == suffixLimit && *k == *suffixLimit) {
+                    map[j].newpos = map[i].oldpos + offset;  /* yes, point to the earlier key */
+                    // Mark the suffix as deleted
+                    while (*suffix != 0) { *suffix++ = 1; }
+                    *suffix = 1;
+                } else {
+                    break;  /* not a suffix, restart from here */
+                }
+            }
+            i = j;
+        }
+        /*
+         * Re-sort by newpos, then modify the key characters array in-place
+         * to squeeze out unused bytes, and readjust the newpos offsets.
+         */
+        uprv_sortArray(map, keysCount, (int32_t)sizeof(KeyMapEntry),
+                       compareKeyNewpos, nullptr, false, &errorCode);
+        if (U_SUCCESS(errorCode)) {
+            int32_t oldpos, newpos, limit;
+            oldpos = newpos = fKeysBottom;
+            limit = fKeysTop;
+            /* skip key offsets that point into the pool bundle rather than this new bundle */
+            for (i = 0; i < keysCount && map[i].newpos < 0; ++i) {}
+            if (i < keysCount) {
+                while (oldpos < limit) {
+                    if (keys[oldpos] == 1) {
+                        ++oldpos;  /* skip unused bytes */
+                    } else {
+                        /* adjust the new offsets for keys starting here */
+                        while (i < keysCount && map[i].newpos == oldpos) {
+                            map[i++].newpos = newpos;
+                        }
+                        /* move the key characters to their new position */
+                        keys[newpos++] = keys[oldpos++];
+                    }
+                }
+                U_ASSERT(i == keysCount);
+            }
+            fKeysTop = newpos;
+            /* Re-sort once more, by old offsets for binary searching. */
+            uprv_sortArray(map, keysCount, (int32_t)sizeof(KeyMapEntry),
+                           compareKeyOldpos, nullptr, false, &errorCode);
+            if (U_SUCCESS(errorCode)) {
+                /* key size reduction by limit - newpos */
+                fKeyMap = map;
+                map = nullptr;
+            }
+        }
+    }
+    uprv_free(map);
+}
+
+static int32_t U_CALLCONV
+compareStringSuffixes(const void * /*context*/, const void *l, const void *r) {
+    const StringResource *left = *((const StringResource **)l);
+    const StringResource *right = *((const StringResource **)r);
+    const char16_t *lStart = left->getBuffer();
+    const char16_t *lLimit = lStart + left->length();
+    const char16_t *rStart = right->getBuffer();
+    const char16_t *rLimit = rStart + right->length();
+    int32_t diff;
+    /* compare keys in reverse character order */
+    while (lStart < lLimit && rStart < rLimit) {
+        diff = (int32_t)*--lLimit - (int32_t)*--rLimit;
+        if (diff != 0) {
+            return diff;
+        }
+    }
+    /* sort equal suffixes by descending string length */
+    return right->length() - left->length();
+}
+
+static int32_t U_CALLCONV
+compareStringLengths(const void * /*context*/, const void *l, const void *r) {
+    const StringResource *left = *((const StringResource **)l);
+    const StringResource *right = *((const StringResource **)r);
+    int32_t diff;
+    /* Make "is suffix of another string" compare greater than a non-suffix. */
+    diff = (int)(left->fSame != nullptr) - (int)(right->fSame != nullptr);
+    if (diff != 0) {
+        return diff;
+    }
+    /* sort by ascending string length */
+    diff = left->length() - right->length();
+    if (diff != 0) {
+        return diff;
+    }
+    // sort by descending size reduction
+    diff = right->fNumUnitsSaved - left->fNumUnitsSaved;
+    if (diff != 0) {
+        return diff;
+    }
+    // sort lexically
+    return left->fString.compare(right->fString);
+}
+
+void
+StringResource::writeUTF16v2(int32_t base, UnicodeString &dest) {
+    int32_t len = length();
+    fRes = URES_MAKE_RESOURCE(URES_STRING_V2, base + dest.length());
+    fWritten = true;
+    switch(fNumCharsForLength) {
+    case 0:
+        break;
+    case 1:
+        dest.append((char16_t)(0xdc00 + len));
+        break;
+    case 2:
+        dest.append((char16_t)(0xdfef + (len >> 16)));
+        dest.append((char16_t)len);
+        break;
+    case 3:
+        dest.append((char16_t)0xdfff);
+        dest.append((char16_t)(len >> 16));
+        dest.append((char16_t)len);
+        break;
+    default:
+        break;  /* will not occur */
+    }
+    dest.append(fString);
+    dest.append((char16_t)0);
+}
+
+void
+SRBRoot::compactStringsV2(UHashtable *stringSet, UErrorCode &errorCode) {
+    if (U_FAILURE(errorCode)) {
+        return;
+    }
+    // Store the StringResource pointers in an array for
+    // easy sorting and processing.
+    // We enumerate a set of strings, so there are no duplicates.
+    int32_t count = uhash_count(stringSet);
+    LocalArray<StringResource *> array(new StringResource *[count], errorCode);
+    if (U_FAILURE(errorCode)) {
+        return;
+    }
+    for (int32_t pos = UHASH_FIRST, i = 0; i < count; ++i) {
+        array[i] = (StringResource *)uhash_nextElement(stringSet, &pos)->key.pointer;
+    }
+    /* Sort the strings so that each one is immediately followed by all of its suffixes. */
+    uprv_sortArray(array.getAlias(), count, (int32_t)sizeof(struct SResource **),
+                   compareStringSuffixes, nullptr, false, &errorCode);
+    if (U_FAILURE(errorCode)) {
+        return;
+    }
+    /*
+     * Make suffixes point into earlier, longer strings that contain them.
+     * Temporarily use fSame and fSuffixOffset for suffix strings to
+     * refer to the remaining ones.
+     */
+    for (int32_t i = 0; i < count;) {
+        /*
+         * This string is not a suffix of the previous one;
+         * write this one and subsume the following ones that are
+         * suffixes of this one.
+         */
+        StringResource *res = array[i];
+        res->fNumUnitsSaved = (res->fNumCopies - 1) * res->get16BitStringsLength();
+        // Whole duplicates of pool strings are already account for in fPoolStringIndexLimit,
+        // see StringResource::handlePreflightStrings().
+        int32_t j;
+        for (j = i + 1; j < count; ++j) {
+            StringResource *suffixRes = array[j];
+            /* Is it a suffix of the earlier, longer string? */
+            if (res->fString.endsWith(suffixRes->fString)) {
+                assert(res->length() != suffixRes->length());  // Set strings are unique.
+                if (suffixRes->fWritten) {
+                    // Pool string, skip.
+                } else if (suffixRes->fNumCharsForLength == 0) {
+                    /* yes, point to the earlier string */
+                    suffixRes->fSame = res;
+                    suffixRes->fSuffixOffset = res->length() - suffixRes->length();
+                    if (res->fWritten) {
+                        // Suffix-share res which is a pool string.
+                        // Compute the resource word and collect the maximum.
+                        suffixRes->fRes =
+                                res->fRes + res->fNumCharsForLength + suffixRes->fSuffixOffset;
+                        int32_t poolStringIndex = (int32_t)RES_GET_OFFSET(suffixRes->fRes);
+                        if (poolStringIndex >= fPoolStringIndexLimit) {
+                            fPoolStringIndexLimit = poolStringIndex + 1;
+                        }
+                        suffixRes->fWritten = true;
+                    }
+                    res->fNumUnitsSaved += suffixRes->fNumCopies * suffixRes->get16BitStringsLength();
+                } else {
+                    /* write the suffix by itself if we need explicit length */
+                }
+            } else {
+                break;  /* not a suffix, restart from here */
+            }
+        }
+        i = j;
+    }
+    /*
+     * Re-sort the strings by ascending length (except suffixes last)
+     * to optimize for URES_TABLE16 and URES_ARRAY16:
+     * Keep as many as possible within reach of 16-bit offsets.
+     */
+    uprv_sortArray(array.getAlias(), count, (int32_t)sizeof(struct SResource **),
+                   compareStringLengths, nullptr, false, &errorCode);
+    if (U_FAILURE(errorCode)) {
+        return;
+    }
+    if (fIsPoolBundle) {
+        // Write strings that are sufficiently shared.
+        // Avoid writing other strings.
+        int32_t numStringsWritten = 0;
+        int32_t numUnitsSaved = 0;
+        int32_t numUnitsNotSaved = 0;
+        for (int32_t i = 0; i < count; ++i) {
+            StringResource *res = array[i];
+            // Maximum pool string index when suffix-sharing the last character.
+            int32_t maxStringIndex =
+                    f16BitUnits.length() + res->fNumCharsForLength + res->length() - 1;
+            if (res->fNumUnitsSaved >= GENRB_MIN_16BIT_UNITS_SAVED_FOR_POOL_STRING &&
+                    maxStringIndex < RES_MAX_OFFSET) {
+                res->writeUTF16v2(0, f16BitUnits);
+                ++numStringsWritten;
+                numUnitsSaved += res->fNumUnitsSaved;
+            } else {
+                numUnitsNotSaved += res->fNumUnitsSaved;
+                res->fRes = URES_MAKE_EMPTY_RESOURCE(URES_STRING);
+                res->fWritten = true;
+            }
+        }
+        if (f16BitUnits.isBogus()) {
+            errorCode = U_MEMORY_ALLOCATION_ERROR;
+        }
+        if (getShowWarning()) {  // not quiet
+            printf("number of shared strings: %d\n", (int)numStringsWritten);
+            printf("16-bit units for strings: %6d = %6d bytes\n",
+                   (int)f16BitUnits.length(), (int)f16BitUnits.length() * 2);
+            printf("16-bit units saved:       %6d = %6d bytes\n",
+                   (int)numUnitsSaved, (int)numUnitsSaved * 2);
+            printf("16-bit units not saved:   %6d = %6d bytes\n",
+                   (int)numUnitsNotSaved, (int)numUnitsNotSaved * 2);
+        }
+    } else {
+        assert(fPoolStringIndexLimit <= fUsePoolBundle->fStringIndexLimit);
+        /* Write the non-suffix strings. */
+        int32_t i;
+        for (i = 0; i < count && array[i]->fSame == nullptr; ++i) {
+            StringResource *res = array[i];
+            if (!res->fWritten) {
+                int32_t localStringIndex = f16BitUnits.length();
+                if (localStringIndex >= fLocalStringIndexLimit) {
+                    fLocalStringIndexLimit = localStringIndex + 1;
+                }
+                res->writeUTF16v2(fPoolStringIndexLimit, f16BitUnits);
+            }
+        }
+        if (f16BitUnits.isBogus()) {
+            errorCode = U_MEMORY_ALLOCATION_ERROR;
+            return;
+        }
+        if (fWritePoolBundle != nullptr && gFormatVersion >= 3) {
+            PseudoListResource *poolStrings =
+                    static_cast<PseudoListResource *>(fWritePoolBundle->fRoot);
+            for (i = 0; i < count && array[i]->fSame == nullptr; ++i) {
+                assert(!array[i]->fString.isEmpty());
+                StringResource *poolString =
+                        new StringResource(fWritePoolBundle, array[i]->fString, errorCode);
+                if (poolString == nullptr) {
+                    errorCode = U_MEMORY_ALLOCATION_ERROR;
+                    break;
+                }
+                poolStrings->add(poolString);
+            }
+        }
+        /* Write the suffix strings. Make each point to the real string. */
+        for (; i < count; ++i) {
+            StringResource *res = array[i];
+            if (res->fWritten) {
+                continue;
+            }
+            StringResource *same = res->fSame;
+            assert(res->length() != same->length());  // Set strings are unique.
+            res->fRes = same->fRes + same->fNumCharsForLength + res->fSuffixOffset;
+            int32_t localStringIndex = (int32_t)RES_GET_OFFSET(res->fRes) - fPoolStringIndexLimit;
+            // Suffixes of pool strings have been set already.
+            assert(localStringIndex >= 0);
+            if (localStringIndex >= fLocalStringIndexLimit) {
+                fLocalStringIndexLimit = localStringIndex + 1;
+            }
+            res->fWritten = true;
+        }
+    }
+    // +1 to account for the initial zero in f16BitUnits
+    assert(f16BitUnits.length() <= (f16BitStringsLength + 1));
+}
+
+void SResource::applyFilter(
+        const PathFilter& /*filter*/,
+        ResKeyPath& /*path*/,
+        const SRBRoot* /*bundle*/) {
+    // Only a few resource types (tables) are capable of being filtered.
+}
+
+void TableResource::applyFilter(
+        const PathFilter& filter,
+        ResKeyPath& path,
+        const SRBRoot* bundle) {
+    SResource* prev = nullptr;
+    SResource* curr = fFirst;
+    for (; curr != nullptr;) {
+        path.push(curr->getKeyString(bundle));
+        auto inclusion = filter.match(path);
+        if (inclusion == PathFilter::EInclusion::INCLUDE) {
+            // Include whole subtree
+            // no-op
+            if (isVerbose()) {
+                std::cout << "genrb subtree: " << bundle->fLocale << ": INCLUDE: " << path << std::endl;
+            }
+        } else if (inclusion == PathFilter::EInclusion::EXCLUDE) {
+            // Reject the whole subtree
+            // Remove it from the linked list
+            if (isVerbose()) {
+                std::cout << "genrb subtree: " << bundle->fLocale << ": DELETE:  " << path << std::endl;
+            }
+            if (prev == nullptr) {
+                fFirst = curr->fNext;
+            } else {
+                prev->fNext = curr->fNext;
+            }
+            fCount--;
+            delete curr;
+            curr = prev;
+        } else {
+            U_ASSERT(inclusion == PathFilter::EInclusion::PARTIAL);
+            // Recurse into the child
+            curr->applyFilter(filter, path, bundle);
+        }
+        path.pop();
+
+        prev = curr;
+        if (curr == nullptr) {
+            curr = fFirst;
+        } else {
+            curr = curr->fNext;
+        }
+    }
+}
diff --git a/intl/icu/source/tools/genrb/reslist.h b/intl/icu/source/tools/genrb/reslist.h
new file mode 100644
index 0000000000..17797bc36c
--- /dev/null
+++ b/intl/icu/source/tools/genrb/reslist.h
@@ -0,0 +1,446 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 2000-2015, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*
+* File reslist.h
+*
+* Modification History:
+*
+*   Date        Name        Description
+*   02/21/00    weiv        Creation.
+*******************************************************************************
+*/
+
+#ifndef RESLIST_H
+#define RESLIST_H
+
+#define KEY_SPACE_SIZE 65536
+#define RESLIST_INT_VECTOR_INIT_SIZE 2048
+
+#include <functional>
+
+#include "unicode/utypes.h"
+#include "unicode/unistr.h"
+#include "unicode/ures.h"
+#include "unicode/ustring.h"
+#include "cmemory.h"
+#include "cstring.h"
+#include "uhash.h"
+#include "unewdata.h"
+#include "uresdata.h"
+#include "ustr.h"
+
+U_CDECL_BEGIN
+
+class PathFilter;
+class PseudoListResource;
+class ResKeyPath;
+
+struct ResFile {
+    ResFile()
+            : fBytes(nullptr), fIndexes(nullptr),
+              fKeys(nullptr), fKeysLength(0), fKeysCount(0),
+              fStrings(nullptr), fStringIndexLimit(0),
+              fChecksum(0) {}
+    ~ResFile() { close(); }
+
+    void close();
+
+    uint8_t *fBytes;
+    const int32_t *fIndexes;
+    const char *fKeys;
+    int32_t fKeysLength;
+    int32_t fKeysCount;
+
+    PseudoListResource *fStrings;
+    int32_t fStringIndexLimit;
+
+    int32_t fChecksum;
+};
+
+struct SResource;
+
+typedef struct KeyMapEntry {
+    int32_t oldpos, newpos;
+} KeyMapEntry;
+
+/* Resource bundle root table */
+struct SRBRoot {
+    SRBRoot(const UString *comment, UBool isPoolBundle, UErrorCode &errorCode);
+    ~SRBRoot();
+
+    void write(const char *outputDir, const char *outputPkg,
+               char *writtenFilename, int writtenFilenameLen, UErrorCode &errorCode);
+
+    void setLocale(char16_t *locale, UErrorCode &errorCode);
+    int32_t addTag(const char *tag, UErrorCode &errorCode);
+
+    const char *getKeyString(int32_t key) const;
+    const char *getKeyBytes(int32_t *pLength) const;
+
+    int32_t addKeyBytes(const char *keyBytes, int32_t length, UErrorCode &errorCode);
+
+    void compactKeys(UErrorCode &errorCode);
+
+    int32_t makeRes16(uint32_t resWord) const;
+    int32_t mapKey(int32_t oldpos) const;
+
+private:
+    void compactStringsV2(UHashtable *stringSet, UErrorCode &errorCode);
+
+public:
+    // TODO: private
+
+  SResource *fRoot;  // Normally a TableResource.
+  char *fLocale;
+  int32_t fIndexLength;
+  int32_t fMaxTableLength;
+  UBool fNoFallback; /* see URES_ATT_NO_FALLBACK */
+  int8_t fStringsForm; /* default STRINGS_UTF16_V1 */
+  UBool fIsPoolBundle;
+
+  char *fKeys;
+  KeyMapEntry *fKeyMap;
+  int32_t fKeysBottom, fKeysTop;
+  int32_t fKeysCapacity;
+  int32_t fKeysCount;
+  int32_t fLocalKeyLimit; /* key offset < limit fits into URES_TABLE */
+
+  icu::UnicodeString f16BitUnits;
+  int32_t f16BitStringsLength;
+
+  const ResFile *fUsePoolBundle;
+  int32_t fPoolStringIndexLimit;
+  int32_t fPoolStringIndex16Limit;
+  int32_t fLocalStringIndexLimit;
+  SRBRoot *fWritePoolBundle;
+};
+
+/* write a java resource file */
+// TODO: C++ify
+void bundle_write_java(struct SRBRoot *bundle, const char *outputDir, const char* outputEnc, char *writtenFilename, 
+                       int writtenFilenameLen, const char* packageName, const char* bundleName, UErrorCode *status);
+
+/* write a xml resource file */
+// TODO: C++ify
+void bundle_write_xml(struct SRBRoot *bundle, const char *outputDir,const char* outputEnc, const char* rbname,
+                  char *writtenFilename, int writtenFilenameLen, const char* language, const char* package, UErrorCode *status);
+
+/* Various resource types */
+
+/*
+ * Return a unique pointer to a dummy object,
+ * for use in non-error cases when no resource is to be added to the bundle.
+ * (nullptr is used in error cases.)
+ */
+struct SResource* res_none();
+
+class ArrayResource;
+class TableResource;
+class IntVectorResource;
+
+TableResource *table_open(struct SRBRoot *bundle, const char *tag, const struct UString* comment, UErrorCode *status);
+
+ArrayResource *array_open(struct SRBRoot *bundle, const char *tag, const struct UString* comment, UErrorCode *status);
+
+struct SResource *string_open(struct SRBRoot *bundle, const char *tag, const char16_t *value, int32_t len, const struct UString* comment, UErrorCode *status);
+
+struct SResource *alias_open(struct SRBRoot *bundle, const char *tag, char16_t *value, int32_t len, const struct UString* comment, UErrorCode *status);
+
+IntVectorResource *intvector_open(struct SRBRoot *bundle, const char *tag,  const struct UString* comment, UErrorCode *status);
+
+struct SResource *int_open(struct SRBRoot *bundle, const char *tag, int32_t value, const struct UString* comment, UErrorCode *status);
+
+struct SResource *bin_open(struct SRBRoot *bundle, const char *tag, uint32_t length, uint8_t *data, const char* fileName, const struct UString* comment, UErrorCode *status);
+
+/* Resource place holder */
+
+struct SResource {
+    SResource();
+    SResource(SRBRoot *bundle, const char *tag, int8_t type, const UString* comment,
+              UErrorCode &errorCode);
+    virtual ~SResource();
+
+    UBool isTable() const { return fType == URES_TABLE; }
+    UBool isString() const { return fType == URES_STRING; }
+
+    const char *getKeyString(const SRBRoot *bundle) const;
+
+    /**
+     * Preflights strings.
+     * Finds duplicates and counts the total number of string code units
+     * so that they can be written first to the 16-bit array,
+     * for minimal string and container storage.
+     *
+     * We walk the final parse tree, rather than collecting this information while building it,
+     * so that we need not deal with changes to the parse tree (especially removing resources).
+     */
+    void preflightStrings(SRBRoot *bundle, UHashtable *stringSet, UErrorCode &errorCode);
+    virtual void handlePreflightStrings(SRBRoot *bundle, UHashtable *stringSet, UErrorCode &errorCode);
+
+    /**
+     * Writes resource values into f16BitUnits
+     * and determines the resource item word, if possible.
+     */
+    void write16(SRBRoot *bundle);
+    virtual void handleWrite16(SRBRoot *bundle);
+
+    /**
+     * Calculates ("preflights") and advances the *byteOffset
+     * by the size of the resource's data in the binary file and
+     * determines the resource item word.
+     *
+     * Most handlePreWrite() functions may add any number of bytes, but preWrite()
+     * will always pad it to a multiple of 4.
+     * The resource item type may be a related subtype of the fType.
+     *
+     * The preWrite() and write() functions start and end at the same
+     * byteOffset values.
+     * Prewriting allows bundle.write() to determine the root resource item word,
+     * before actually writing the bundle contents to the file,
+     * which is necessary because the root item is stored at the beginning.
+     */
+    void preWrite(uint32_t *byteOffset);
+    virtual void handlePreWrite(uint32_t *byteOffset);
+
+    /**
+     * Writes the resource's data to mem and updates the byteOffset
+     * in parallel.
+     */
+    void write(UNewDataMemory *mem, uint32_t *byteOffset);
+    virtual void handleWrite(UNewDataMemory *mem, uint32_t *byteOffset);
+
+    /**
+     * Applies the given filter with the given base path to this resource.
+     * Removes child resources rejected by the filter recursively.
+     * 
+     * @param bundle Needed in order to access the key for this and child resources.
+     */
+    virtual void applyFilter(const PathFilter& filter, ResKeyPath& path, const SRBRoot* bundle);
+
+    /**
+     * Calls the given function for every key ID present in this tree.
+     */
+    virtual void collectKeys(std::function<void(int32_t)> collector) const;
+
+    int8_t   fType;     /* nominal type: fRes (when != 0xffffffff) may use subtype */
+    UBool    fWritten;  /* res_write() can exit early */
+    uint32_t fRes;      /* resource item word; RES_BOGUS=0xffffffff if not known yet */
+    int32_t  fRes16;    /* Res16 version of fRes for Table, Table16, Array16; -1 if it does not fit. */
+    int32_t  fKey;      /* Index into bundle->fKeys; -1 if no key. */
+    int32_t  fKey16;    /* Key16 version of fKey for Table & Table16; -1 if no key or it does not fit. */
+    int      line;      /* used internally to report duplicate keys in tables */
+    SResource *fNext;   /* This is for internal chaining while building */
+    struct UString fComment;
+};
+
+class ContainerResource : public SResource {
+public:
+    ContainerResource(SRBRoot *bundle, const char *tag, int8_t type,
+                      const UString* comment, UErrorCode &errorCode)
+            : SResource(bundle, tag, type, comment, errorCode),
+              fCount(0), fFirst(nullptr) {}
+    virtual ~ContainerResource();
+
+    void handlePreflightStrings(SRBRoot *bundle, UHashtable *stringSet, UErrorCode &errorCode) override;
+
+    void collectKeys(std::function<void(int32_t)> collector) const override;
+
+protected:
+    void writeAllRes16(SRBRoot *bundle);
+    void preWriteAllRes(uint32_t *byteOffset);
+    void writeAllRes(UNewDataMemory *mem, uint32_t *byteOffset);
+    void writeAllRes32(UNewDataMemory *mem, uint32_t *byteOffset);
+
+public:
+    // TODO: private with getter?
+    uint32_t fCount;
+    SResource *fFirst;
+};
+
+class TableResource : public ContainerResource {
+public:
+    TableResource(SRBRoot *bundle, const char *tag,
+                  const UString* comment, UErrorCode &errorCode)
+            : ContainerResource(bundle, tag, URES_TABLE, comment, errorCode),
+              fTableType(URES_TABLE), fRoot(bundle) {}
+    virtual ~TableResource();
+
+    void add(SResource *res, int linenumber, UErrorCode &errorCode);
+
+    void handleWrite16(SRBRoot *bundle) override;
+    void handlePreWrite(uint32_t *byteOffset) override;
+    void handleWrite(UNewDataMemory *mem, uint32_t *byteOffset) override;
+
+    void applyFilter(const PathFilter& filter, ResKeyPath& path, const SRBRoot* bundle) override;
+
+    int8_t fTableType;  // determined by table_write16() for table_preWrite() & table_write()
+    SRBRoot *fRoot;
+};
+
+class ArrayResource : public ContainerResource {
+public:
+    ArrayResource(SRBRoot *bundle, const char *tag,
+                  const UString* comment, UErrorCode &errorCode)
+            : ContainerResource(bundle, tag, URES_ARRAY, comment, errorCode),
+              fLast(nullptr) {}
+    virtual ~ArrayResource();
+
+    void add(SResource *res);
+
+    virtual void handleWrite16(SRBRoot *bundle) override;
+    virtual void handlePreWrite(uint32_t *byteOffset) override;
+    virtual void handleWrite(UNewDataMemory *mem, uint32_t *byteOffset) override;
+
+    SResource *fLast;
+};
+
+/**
+ * List of resources for a pool bundle.
+ * Writes an empty table resource, rather than a container structure.
+ */
+class PseudoListResource : public ContainerResource {
+public:
+    PseudoListResource(SRBRoot *bundle, UErrorCode &errorCode)
+            : ContainerResource(bundle, nullptr, URES_TABLE, nullptr, errorCode) {}
+    virtual ~PseudoListResource();
+
+    void add(SResource *res);
+
+    virtual void handleWrite16(SRBRoot *bundle) override;
+};
+
+class StringBaseResource : public SResource {
+public:
+    StringBaseResource(SRBRoot *bundle, const char *tag, int8_t type,
+                       const char16_t *value, int32_t len,
+                       const UString* comment, UErrorCode &errorCode);
+    StringBaseResource(SRBRoot *bundle, int8_t type,
+                       const icu::UnicodeString &value, UErrorCode &errorCode);
+    StringBaseResource(int8_t type, const char16_t *value, int32_t len, UErrorCode &errorCode);
+    virtual ~StringBaseResource();
+
+    const char16_t *getBuffer() const { return icu::toUCharPtr(fString.getBuffer()); }
+    int32_t length() const { return fString.length(); }
+
+    virtual void handlePreWrite(uint32_t *byteOffset) override;
+    virtual void handleWrite(UNewDataMemory *mem, uint32_t *byteOffset) override;
+
+    // TODO: private with getter?
+    icu::UnicodeString fString;
+};
+
+class StringResource : public StringBaseResource {
+public:
+    StringResource(SRBRoot *bundle, const char *tag, const char16_t *value, int32_t len,
+                   const UString* comment, UErrorCode &errorCode)
+            : StringBaseResource(bundle, tag, URES_STRING, value, len, comment, errorCode),
+              fSame(nullptr), fSuffixOffset(0),
+              fNumCopies(0), fNumUnitsSaved(0), fNumCharsForLength(0) {}
+    StringResource(SRBRoot *bundle, const icu::UnicodeString &value, UErrorCode &errorCode)
+            : StringBaseResource(bundle, URES_STRING, value, errorCode),
+              fSame(nullptr), fSuffixOffset(0),
+              fNumCopies(0), fNumUnitsSaved(0), fNumCharsForLength(0) {}
+    StringResource(int32_t poolStringIndex, int8_t numCharsForLength,
+                   const char16_t *value, int32_t length,
+                   UErrorCode &errorCode)
+            : StringBaseResource(URES_STRING, value, length, errorCode),
+              fSame(nullptr), fSuffixOffset(0),
+              fNumCopies(0), fNumUnitsSaved(0), fNumCharsForLength(numCharsForLength) {
+        // v3 pool string encoded as string-v2 with low offset
+        fRes = URES_MAKE_RESOURCE(URES_STRING_V2, poolStringIndex);
+        fWritten = true;
+    }
+    virtual ~StringResource();
+
+    int32_t get16BitStringsLength() const {
+        return fNumCharsForLength + length() + 1;  // +1 for the NUL
+    }
+
+    virtual void handlePreflightStrings(SRBRoot *bundle, UHashtable *stringSet, UErrorCode &errorCode) override;
+    virtual void handleWrite16(SRBRoot *bundle) override;
+
+    void writeUTF16v2(int32_t base, icu::UnicodeString &dest);
+
+    StringResource *fSame;  // used for duplicates
+    int32_t fSuffixOffset;  // this string is a suffix of fSame at this offset
+    int32_t fNumCopies;     // number of equal strings represented by one stringSet element
+    int32_t fNumUnitsSaved;  // from not writing duplicates and suffixes
+    int8_t fNumCharsForLength;
+};
+
+class AliasResource : public StringBaseResource {
+public:
+    AliasResource(SRBRoot *bundle, const char *tag, const char16_t *value, int32_t len,
+                  const UString* comment, UErrorCode &errorCode)
+            : StringBaseResource(bundle, tag, URES_ALIAS, value, len, comment, errorCode) {}
+    virtual ~AliasResource();
+};
+
+class IntResource : public SResource {
+public:
+    IntResource(SRBRoot *bundle, const char *tag, int32_t value,
+                const UString* comment, UErrorCode &errorCode);
+    virtual ~IntResource();
+
+    // TODO: private with getter?
+    int32_t fValue;
+};
+
+class IntVectorResource : public SResource {
+public:
+    IntVectorResource(SRBRoot *bundle, const char *tag,
+                      const UString* comment, UErrorCode &errorCode);
+    virtual ~IntVectorResource();
+
+    void add(int32_t value, UErrorCode &errorCode);
+
+    virtual void handlePreWrite(uint32_t *byteOffset) override;
+    virtual void handleWrite(UNewDataMemory *mem, uint32_t *byteOffset) override;
+
+    // TODO: UVector32
+    size_t fCount;
+    size_t fSize;
+    uint32_t *fArray;
+};
+
+class BinaryResource : public SResource {
+public:
+    BinaryResource(SRBRoot *bundle, const char *tag,
+                   uint32_t length, uint8_t *data, const char* fileName,
+                   const UString* comment, UErrorCode &errorCode);
+    virtual ~BinaryResource();
+
+    virtual void handlePreWrite(uint32_t *byteOffset) override;
+    virtual void handleWrite(UNewDataMemory *mem, uint32_t *byteOffset) override;
+
+    // TODO: CharString?
+    uint32_t fLength;
+    uint8_t *fData;
+    // TODO: CharString
+    char* fFileName;  // file name for binary or import binary tags if any
+};
+
+// TODO: use LocalPointer or delete
+void res_close(struct SResource *res);
+
+void setIncludeCopyright(UBool val);
+UBool getIncludeCopyright();
+
+void setFormatVersion(int32_t formatVersion);
+
+int32_t getFormatVersion();
+
+void setUsePoolBundle(UBool use);
+
+/* in wrtxml.cpp */
+uint32_t computeCRC(const char *ptr, uint32_t len, uint32_t lastcrc);
+
+U_CDECL_END
+#endif /* #ifndef RESLIST_H */
diff --git a/intl/icu/source/tools/genrb/rle.c b/intl/icu/source/tools/genrb/rle.c
new file mode 100644
index 0000000000..f737c45491
--- /dev/null
+++ b/intl/icu/source/tools/genrb/rle.c
@@ -0,0 +1,408 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 2000-2003, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*
+* File writejava.c
+*
+* Modification History:
+*
+*   Date        Name        Description
+*   01/11/02    Ram        Creation.
+*******************************************************************************
+*/
+#include <stdbool.h>
+#include "rle.h"
+/**
+ * The ESCAPE character is used during run-length encoding.  It signals
+ * a run of identical chars.
+ */
+static const uint16_t ESCAPE = 0xA5A5;
+
+/**
+ * The ESCAPE_BYTE character is used during run-length encoding.  It signals
+ * a run of identical bytes.
+ */
+static const uint8_t ESCAPE_BYTE = (uint8_t)0xA5;
+
+/**
+ * Append a byte to the given StringBuffer, packing two bytes into each
+ * character.  The state parameter maintains intermediary data between
+ * calls.
+ * @param state A two-element array, with state[0] == 0 if this is the
+ * first byte of a pair, or state[0] != 0 if this is the second byte
+ * of a pair, in which case state[1] is the first byte.
+ */
+static uint16_t*
+appendEncodedByte(uint16_t* buffer, uint16_t* buffLimit, uint8_t value, uint8_t state[],UErrorCode* status) {
+    if(!status || U_FAILURE(*status)){
+        return NULL;
+    }
+    if (state[0] != 0) {
+        uint16_t c = (uint16_t) ((state[1] << 8) | (((int32_t) value) & 0xFF));
+        if(buffer < buffLimit){
+            *buffer++ = c;
+        }else{
+            *status = U_BUFFER_OVERFLOW_ERROR;
+        }
+        state[0] = 0;
+        return buffer;
+    }
+    else {
+        state[0] = 1;
+        state[1] = value;
+        return buffer;
+    }
+}
+/**
+ * Encode a run, possibly a degenerate run (of < 4 values).
+ * @param length The length of the run; must be > 0 && <= 0xFF.
+ */
+static uint16_t*
+encodeRunByte(uint16_t* buffer,uint16_t* bufLimit, uint8_t value, int32_t length, uint8_t state[], UErrorCode* status) {
+    if(!status || U_FAILURE(*status)){
+        return NULL;
+    }
+    if (length < 4) {
+        int32_t j=0;
+        for (; j<length; ++j) {
+            if (value == ESCAPE_BYTE) {
+                buffer = appendEncodedByte(buffer,bufLimit, ESCAPE_BYTE, state,status);
+            }
+            buffer = appendEncodedByte(buffer,bufLimit, value, state, status);
+        }
+    }
+    else {
+        if (length == ESCAPE_BYTE) {
+            if (value == ESCAPE_BYTE){
+               buffer =  appendEncodedByte(buffer, bufLimit,ESCAPE_BYTE, state,status);
+            }
+            buffer = appendEncodedByte(buffer,bufLimit, value, state, status);
+            --length;
+        }
+        buffer = appendEncodedByte(buffer,bufLimit, ESCAPE_BYTE, state,status);
+        buffer = appendEncodedByte(buffer,bufLimit, (char)length, state, status);
+        buffer = appendEncodedByte(buffer,bufLimit, value, state, status); /* Don't need to escape this value*/
+    }
+    return buffer;
+}
+
+#define APPEND( buffer, bufLimit, value, num, status) UPRV_BLOCK_MACRO_BEGIN { \
+    if(buffer<bufLimit){                    \
+        *buffer++=(value);                  \
+    }else{                                  \
+        *status = U_BUFFER_OVERFLOW_ERROR;  \
+    }                                       \
+    num++;                                  \
+} UPRV_BLOCK_MACRO_END
+
+/**
+ * Encode a run, possibly a degenerate run (of < 4 values).
+ * @param length The length of the run; must be > 0 && <= 0xFFFF.
+ */
+static uint16_t*
+encodeRunShort(uint16_t* buffer,uint16_t* bufLimit, uint16_t value, int32_t length,UErrorCode* status) {
+    int32_t num=0;
+    if (length < 4) {
+        int j=0;
+        for (; j<length; ++j) {
+            if (value == (int32_t) ESCAPE){
+                APPEND(buffer,bufLimit,ESCAPE, num, status);
+
+            }
+            APPEND(buffer,bufLimit,value,num, status);
+        }
+    }
+    else {
+        if (length == (int32_t) ESCAPE) {
+            if (value == (int32_t) ESCAPE){
+                APPEND(buffer,bufLimit,ESCAPE,num,status);
+
+            }
+            APPEND(buffer,bufLimit,value,num,status);
+            --length;
+        }
+        APPEND(buffer,bufLimit,ESCAPE,num,status);
+        APPEND(buffer,bufLimit,(uint16_t) length, num,status);
+        APPEND(buffer,bufLimit,(uint16_t)value, num, status); /* Don't need to escape this value */
+    }
+    return buffer;
+}
+
+/**
+ * Construct a string representing a char array.  Use run-length encoding.
+ * A character represents itself, unless it is the ESCAPE character.  Then
+ * the following notations are possible:
+ *   ESCAPE ESCAPE   ESCAPE literal
+ *   ESCAPE n c      n instances of character c
+ * Since an encoded run occupies 3 characters, we only encode runs of 4 or
+ * more characters.  Thus we have n > 0 and n != ESCAPE and n <= 0xFFFF.
+ * If we encounter a run where n == ESCAPE, we represent this as:
+ *   c ESCAPE n-1 c
+ * The ESCAPE value is chosen so as not to collide with commonly
+ * seen values.
+ */
+int32_t
+usArrayToRLEString(const uint16_t* src,int32_t srcLen,uint16_t* buffer, int32_t bufLen,UErrorCode* status) {
+    uint16_t* bufLimit =  buffer+bufLen;
+    uint16_t* saveBuffer = buffer;
+    if(buffer < bufLimit){
+        *buffer++ =  (uint16_t)(srcLen>>16);
+        if(buffer<bufLimit){
+            uint16_t runValue = src[0];
+            int32_t runLength = 1;
+            int i=1;
+            *buffer++ = (uint16_t) srcLen;
+
+            for (; i<srcLen; ++i) {
+                uint16_t s = src[i];
+                if (s == runValue && runLength < 0xFFFF){
+                    ++runLength;
+                }else {
+                    buffer = encodeRunShort(buffer,bufLimit, (uint16_t)runValue, runLength,status);
+                    runValue = s;
+                    runLength = 1;
+                }
+            }
+            buffer= encodeRunShort(buffer,bufLimit,(uint16_t)runValue, runLength,status);
+        }else{
+            *status = U_BUFFER_OVERFLOW_ERROR;
+        }
+    }else{
+        *status = U_BUFFER_OVERFLOW_ERROR;
+    }
+    return (int32_t)(buffer - saveBuffer);
+}
+
+/**
+ * Construct a string representing a byte array.  Use run-length encoding.
+ * Two bytes are packed into a single char, with a single extra zero byte at
+ * the end if needed.  A byte represents itself, unless it is the
+ * ESCAPE_BYTE.  Then the following notations are possible:
+ *   ESCAPE_BYTE ESCAPE_BYTE   ESCAPE_BYTE literal
+ *   ESCAPE_BYTE n b           n instances of byte b
+ * Since an encoded run occupies 3 bytes, we only encode runs of 4 or
+ * more bytes.  Thus we have n > 0 and n != ESCAPE_BYTE and n <= 0xFF.
+ * If we encounter a run where n == ESCAPE_BYTE, we represent this as:
+ *   b ESCAPE_BYTE n-1 b
+ * The ESCAPE_BYTE value is chosen so as not to collide with commonly
+ * seen values.
+ */
+int32_t
+byteArrayToRLEString(const uint8_t* src,int32_t srcLen, uint16_t* buffer,int32_t bufLen, UErrorCode* status) {
+    const uint16_t* saveBuf = buffer;
+    uint16_t* bufLimit =  buffer+bufLen;
+    if(buffer < bufLimit){
+        *buffer++ = ((uint16_t) (srcLen >> 16));
+
+        if(buffer<bufLimit){
+            uint8_t runValue = src[0];
+            int runLength = 1;
+            uint8_t state[2]= {0};
+            int i=1;
+            *buffer++=((uint16_t) srcLen);
+            for (; i<srcLen; ++i) {
+                uint8_t b = src[i];
+                if (b == runValue && runLength < 0xFF){
+                    ++runLength;
+                }
+                else {
+                    buffer = encodeRunByte(buffer, bufLimit,runValue, runLength, state,status);
+                    runValue = b;
+                    runLength = 1;
+                }
+            }
+            buffer = encodeRunByte(buffer,bufLimit, runValue, runLength, state, status);
+
+            /* We must save the final byte, if there is one, by padding
+             * an extra zero.
+             */
+            if (state[0] != 0) {
+                buffer = appendEncodedByte(buffer,bufLimit, 0, state ,status);
+            }
+        }else{
+            *status = U_BUFFER_OVERFLOW_ERROR;
+        }
+    }else{
+        *status = U_BUFFER_OVERFLOW_ERROR;
+    }
+    return (int32_t) (buffer - saveBuf);
+}
+
+
+/**
+ * Construct an array of shorts from a run-length encoded string.
+ */
+int32_t
+rleStringToUCharArray(uint16_t* src, int32_t srcLen, uint16_t* target, int32_t tgtLen, UErrorCode* status) {
+    int32_t length = 0;
+    int32_t ai = 0;
+    int i=2;
+
+    if(!status || U_FAILURE(*status)){
+        return 0;
+    }
+    /* the source is null terminated */
+    if(srcLen == -1){
+        srcLen = u_strlen(src);
+    }
+    if(srcLen <= 2){
+        return 2;
+    }
+    length = (((int32_t) src[0]) << 16) | ((int32_t) src[1]);
+
+    if(target == NULL){
+        return length;
+    }
+    if(tgtLen < length){
+        *status = U_BUFFER_OVERFLOW_ERROR;
+        return length;
+    }
+
+    for (; i<srcLen; ++i) {
+        uint16_t c = src[i];
+        if (c == ESCAPE) {
+            c = src[++i];
+            if (c == ESCAPE) {
+                target[ai++] = c;
+            } else {
+                int32_t runLength = (int32_t) c;
+                uint16_t runValue = src[++i];
+                int j=0;
+                for (; j<runLength; ++j) {
+                    target[ai++] = runValue;
+                }
+            }
+        }
+        else {
+            target[ai++] = c;
+        }
+    }
+
+    if (ai != length){
+        *status = U_INTERNAL_PROGRAM_ERROR;
+    }
+
+    return length;
+}
+
+/**
+ * Construct an array of bytes from a run-length encoded string.
+ */
+int32_t
+rleStringToByteArray(uint16_t* src, int32_t srcLen, uint8_t* target, int32_t tgtLen, UErrorCode* status) {
+
+    int32_t length = 0;
+    UBool nextChar = true;
+    uint16_t c = 0;
+    int32_t node = 0;
+    int32_t runLength = 0;
+    int32_t i = 2;
+    int32_t ai=0;
+
+    if(!status || U_FAILURE(*status)){
+        return 0;
+    }
+    /* the source is null terminated */
+    if(srcLen == -1){
+        srcLen = u_strlen(src);
+    }
+    if(srcLen <= 2){
+        return 2;
+    }
+    length = (((int32_t) src[0]) << 16) | ((int32_t) src[1]);
+
+    if(target == NULL){
+        return length;
+    }
+    if(tgtLen < length){
+        *status = U_BUFFER_OVERFLOW_ERROR;
+        return length;
+    }
+
+    for (; ai<tgtLen; ) {
+       /* This part of the loop places the next byte into the local
+        * variable 'b' each time through the loop.  It keeps the
+        * current character in 'c' and uses the boolean 'nextChar'
+        * to see if we've taken both bytes out of 'c' yet.
+        */
+        uint8_t b;
+        if (nextChar) {
+            c = src[i++];
+            b = (uint8_t) (c >> 8);
+            nextChar = false;
+        }
+        else {
+            b = (uint8_t) (c & 0xFF);
+            nextChar = true;
+        }
+
+       /* This part of the loop is a tiny state machine which handles
+        * the parsing of the run-length encoding.  This would be simpler
+        * if we could look ahead, but we can't, so we use 'node' to
+        * move between three nodes in the state machine.
+        */
+        switch (node) {
+        case 0:
+            /* Normal idle node */
+            if (b == ESCAPE_BYTE) {
+                node = 1;
+            }
+            else {
+                target[ai++] = b;
+            }
+            break;
+        case 1:
+           /* We have seen one ESCAPE_BYTE; we expect either a second
+            * one, or a run length and value.
+            */
+            if (b == ESCAPE_BYTE) {
+                target[ai++] = ESCAPE_BYTE;
+                node = 0;
+            }
+            else {
+                runLength = b;
+                node = 2;
+            }
+            break;
+        case 2:
+            {
+                int j=0;
+               /* We have seen an ESCAPE_BYTE and length byte.  We interpret
+                * the next byte as the value to be repeated.
+                */
+                for (; j<runLength; ++j){
+                    if(ai<tgtLen){
+                        target[ai++] = b;
+                    }else{
+                        *status = U_BUFFER_OVERFLOW_ERROR;
+                        return ai;
+                    }
+                }
+                node = 0;
+                break;
+            }
+        }
+    }
+
+    if (node != 0){
+        *status = U_INTERNAL_PROGRAM_ERROR;
+        /*("Bad run-length encoded byte array")*/
+        return 0;
+    }
+
+
+    if (i != srcLen){
+        /*("Excess data in RLE byte array string");*/
+        *status = U_INTERNAL_PROGRAM_ERROR;
+        return ai;
+    }
+
+    return ai;
+}
+
diff --git a/intl/icu/source/tools/genrb/rle.h b/intl/icu/source/tools/genrb/rle.h
new file mode 100644
index 0000000000..2684bbe6b2
--- /dev/null
+++ b/intl/icu/source/tools/genrb/rle.h
@@ -0,0 +1,74 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 2000, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*
+* File writejava.c
+*
+* Modification History:
+*
+*   Date        Name        Description
+*   01/11/02    Ram        Creation.
+*******************************************************************************
+*/
+
+#ifndef RLE_H
+#define RLE_H 1
+
+#include "unicode/utypes.h"
+#include "unicode/ustring.h"
+
+U_CDECL_BEGIN
+/**
+ * Construct a string representing a byte array.  Use run-length encoding.
+ * Two bytes are packed into a single char, with a single extra zero byte at
+ * the end if needed.  A byte represents itself, unless it is the
+ * ESCAPE_BYTE.  Then the following notations are possible:
+ *   ESCAPE_BYTE ESCAPE_BYTE   ESCAPE_BYTE literal
+ *   ESCAPE_BYTE n b           n instances of byte b
+ * Since an encoded run occupies 3 bytes, we only encode runs of 4 or
+ * more bytes.  Thus we have n > 0 and n != ESCAPE_BYTE and n <= 0xFF.
+ * If we encounter a run where n == ESCAPE_BYTE, we represent this as:
+ *   b ESCAPE_BYTE n-1 b
+ * The ESCAPE_BYTE value is chosen so as not to collide with commonly
+ * seen values.
+ */
+int32_t
+byteArrayToRLEString(const uint8_t* src,int32_t srcLen, uint16_t* buffer,int32_t bufLen, UErrorCode* status);
+
+
+/**
+ * Construct a string representing a char array.  Use run-length encoding.
+ * A character represents itself, unless it is the ESCAPE character.  Then
+ * the following notations are possible:
+ *   ESCAPE ESCAPE   ESCAPE literal
+ *   ESCAPE n c      n instances of character c
+ * Since an encoded run occupies 3 characters, we only encode runs of 4 or
+ * more characters.  Thus we have n > 0 and n != ESCAPE and n <= 0xFFFF.
+ * If we encounter a run where n == ESCAPE, we represent this as:
+ *   c ESCAPE n-1 c
+ * The ESCAPE value is chosen so as not to collide with commonly
+ * seen values.
+ */
+int32_t
+usArrayToRLEString(const uint16_t* src,int32_t srcLen,uint16_t* buffer, int32_t bufLen,UErrorCode* status);
+
+/**
+ * Construct an array of bytes from a run-length encoded string.
+ */
+int32_t
+rleStringToByteArray(uint16_t* src, int32_t srcLen, uint8_t* target, int32_t tgtLen, UErrorCode* status); 
+/**
+ * Construct an array of shorts from a run-length encoded string.
+ */
+int32_t
+rleStringToUCharArray(uint16_t* src, int32_t srcLen, uint16_t* target, int32_t tgtLen, UErrorCode* status);
+
+U_CDECL_END
+
+#endif
diff --git a/intl/icu/source/tools/genrb/sources.txt b/intl/icu/source/tools/genrb/sources.txt
new file mode 100644
index 0000000000..0128e2094f
--- /dev/null
+++ b/intl/icu/source/tools/genrb/sources.txt
@@ -0,0 +1,12 @@
+errmsg.c
+filterrb.cpp
+genrb.cpp
+parse.cpp
+prscmnts.cpp
+rbutil.c
+read.c
+reslist.cpp
+rle.c
+ustr.c
+wrtjava.cpp
+wrtxml.cpp
diff --git a/intl/icu/source/tools/genrb/ustr.c b/intl/icu/source/tools/genrb/ustr.c
new file mode 100644
index 0000000000..15f76a80ca
--- /dev/null
+++ b/intl/icu/source/tools/genrb/ustr.c
@@ -0,0 +1,219 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 1998-2012, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*
+* File ustr.c
+*
+* Modification History:
+*
+*   Date        Name        Description
+*   05/28/99    stephen     Creation.
+*******************************************************************************
+*/
+
+#include "ustr.h"
+#include "cmemory.h"
+#include "cstring.h"
+#include "unicode/ustring.h"
+#include "unicode/putil.h"
+#include "unicode/utf16.h"
+
+/* Protos */
+static void ustr_resize(struct UString *s, int32_t len, UErrorCode *status);
+
+/* Macros */
+#define ALLOCATION(minSize) (minSize < 0x80 ? 0x80 : (2 * minSize + 0x80) & ~(0x80 - 1))
+
+U_CFUNC void
+ustr_init(struct UString *s)
+{
+    s->fChars = 0;
+    s->fLength = s->fCapacity = 0;
+}
+
+U_CFUNC void
+ustr_initChars(struct UString *s, const char* source, int32_t length, UErrorCode *status)
+{
+    int i = 0;
+    if (U_FAILURE(*status)) return;
+    s->fChars = 0;
+    s->fLength = s->fCapacity = 0;
+    if (length == -1) {
+        length = (int32_t)uprv_strlen(source);
+    }
+    if(s->fCapacity < length) {
+      ustr_resize(s, ALLOCATION(length), status);
+      if(U_FAILURE(*status)) return;
+    }
+    for (; i < length; i++)
+    {
+      UChar charToAppend;
+      u_charsToUChars(source+i, &charToAppend, 1);
+      ustr_ucat(s, charToAppend, status);
+      /*
+#if U_CHARSET_FAMILY==U_ASCII_FAMILY
+        ustr_ucat(s, (UChar)(uint8_t)(source[i]), status);
+#elif U_CHARSET_FAMILY==U_EBCDIC_FAMILY
+        ustr_ucat(s, (UChar)asciiFromEbcdic[(uint8_t)(*cs++)], status);
+#else
+#   error U_CHARSET_FAMILY is not valid
+#endif
+      */
+    }
+}
+
+U_CFUNC void
+ustr_deinit(struct UString *s)
+{
+    if (s) {
+        uprv_free(s->fChars);
+        s->fChars = 0;
+        s->fLength = s->fCapacity = 0;
+    }
+}
+
+U_CFUNC void
+ustr_cpy(struct UString *dst,
+     const struct UString *src,
+     UErrorCode *status)
+{
+    if(U_FAILURE(*status) || dst == src)
+        return;
+
+    if(dst->fCapacity < src->fLength) {
+        ustr_resize(dst, ALLOCATION(src->fLength), status);
+        if(U_FAILURE(*status))
+            return;
+    }
+    if(src->fChars == NULL || dst->fChars == NULL){
+        return;
+    }
+    u_memcpy(dst->fChars, src->fChars, src->fLength);
+    dst->fLength = src->fLength;
+    dst->fChars[dst->fLength] = 0x0000;
+}
+
+U_CFUNC void
+ustr_setlen(struct UString *s,
+        int32_t len,
+        UErrorCode *status)
+{
+    if(U_FAILURE(*status))
+        return;
+
+    if(s->fCapacity < (len + 1)) {
+        ustr_resize(s, ALLOCATION(len), status);
+        if(U_FAILURE(*status))
+            return;
+    }
+
+    s->fLength = len;
+    s->fChars[len] = 0x0000;
+}
+
+U_CFUNC void
+ustr_cat(struct UString *dst,
+     const struct UString *src,
+     UErrorCode *status)
+{
+    ustr_ncat(dst, src, src->fLength, status);
+}
+
+U_CFUNC void
+ustr_ncat(struct UString *dst,
+      const struct UString *src,
+      int32_t n,
+      UErrorCode *status)
+{
+    if(U_FAILURE(*status) || dst == src)
+        return;
+    
+    if(dst->fCapacity < (dst->fLength + n)) {
+        ustr_resize(dst, ALLOCATION(dst->fLength + n), status);
+        if(U_FAILURE(*status))
+            return;
+    }
+    
+    uprv_memcpy(dst->fChars + dst->fLength, src->fChars,
+                sizeof(UChar) * n);
+    dst->fLength += src->fLength;
+    dst->fChars[dst->fLength] = 0x0000;
+}
+
+U_CFUNC void
+ustr_ucat(struct UString *dst,
+      UChar c,
+      UErrorCode *status)
+{
+    if(U_FAILURE(*status))
+        return;
+
+    if(dst->fCapacity < (dst->fLength + 1)) {
+        ustr_resize(dst, ALLOCATION(dst->fLength + 1), status);
+        if(U_FAILURE(*status))
+            return;
+    }
+
+    uprv_memcpy(dst->fChars + dst->fLength, &c,
+        sizeof(UChar) * 1);
+    dst->fLength += 1;
+    dst->fChars[dst->fLength] = 0x0000;
+}
+U_CFUNC void 
+ustr_u32cat(struct UString *dst, UChar32 c, UErrorCode *status){
+    if(c > 0x10FFFF){
+        *status = U_ILLEGAL_CHAR_FOUND;
+        return;
+    }
+    if(c >0xFFFF){
+        ustr_ucat(dst, U16_LEAD(c), status);
+        ustr_ucat(dst, U16_TRAIL(c), status);
+    }else{
+        ustr_ucat(dst, (UChar) c, status);
+    }
+}
+U_CFUNC void
+ustr_uscat(struct UString *dst,
+      const UChar* src,int len,
+      UErrorCode *status)
+{
+    if(U_FAILURE(*status)) 
+        return;
+
+    if(dst->fCapacity < (dst->fLength + len)) {
+        ustr_resize(dst, ALLOCATION(dst->fLength + len), status);
+        if(U_FAILURE(*status))
+            return;
+    }
+
+    uprv_memcpy(dst->fChars + dst->fLength, src,
+        sizeof(UChar) * len);
+    dst->fLength += len;
+    dst->fChars[dst->fLength] = 0x0000;
+}
+
+/* Destroys data in the string */
+static void
+ustr_resize(struct UString *s,
+        int32_t len,
+        UErrorCode *status)
+{
+    if(U_FAILURE(*status))
+        return;
+
+    /* +1 for trailing 0x0000 */
+    s->fChars = (UChar*) uprv_realloc(s->fChars, sizeof(UChar) * (len + 1));
+    if(s->fChars == 0) {
+        *status = U_MEMORY_ALLOCATION_ERROR;
+        s->fLength = s->fCapacity = 0;
+        return;
+    }
+
+    s->fCapacity = len;
+}
diff --git a/intl/icu/source/tools/genrb/ustr.h b/intl/icu/source/tools/genrb/ustr.h
new file mode 100644
index 0000000000..8a69e9d4d5
--- /dev/null
+++ b/intl/icu/source/tools/genrb/ustr.h
@@ -0,0 +1,81 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 1998-2012, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*
+* File ustr.h
+*
+* Modification History:
+*
+*   Date        Name        Description
+*   05/28/99    stephen     Creation.
+*******************************************************************************
+*/
+
+#ifndef USTR_H
+#define USTR_H 1
+
+#include "unicode/utypes.h"
+
+#define U_APPEND_CHAR32(c,target,len) UPRV_BLOCK_MACRO_BEGIN {  \
+    if (c <= 0xffff)                                            \
+    {                                                           \
+        *(target)++ = (UChar) c;                                \
+        len=1;                                                  \
+    }                                                           \
+    else                                                        \
+    {                                                           \
+        target[0] = U16_LEAD(c);                                \
+        target[1] = U16_TRAIL(c);                               \
+        len=2;                                                  \
+        target +=2;                                             \
+    }                                                           \
+} UPRV_BLOCK_MACRO_END
+
+#define U_APPEND_CHAR32_ONLY(c,target) UPRV_BLOCK_MACRO_BEGIN { \
+    if (c <= 0xffff)                                            \
+    {                                                           \
+        *(target)++ = (UChar) c;                                \
+    }                                                           \
+    else                                                        \
+    {                                                           \
+        target[0] = U16_LEAD(c);                                \
+        target[1] = U16_TRAIL(c);                               \
+        target +=2;                                             \
+    }                                                           \
+} UPRV_BLOCK_MACRO_END
+
+/* A C representation of a string "object" (to avoid realloc all the time) */
+struct UString {
+  UChar *fChars;
+  int32_t fLength;
+  int32_t fCapacity;
+};
+
+U_CFUNC void ustr_init(struct UString *s);
+
+U_CFUNC void
+ustr_initChars(struct UString *s, const char* source, int32_t length, UErrorCode *status);
+
+U_CFUNC void ustr_deinit(struct UString *s);
+
+U_CFUNC void ustr_setlen(struct UString *s, int32_t len, UErrorCode *status);
+
+U_CFUNC void ustr_cpy(struct UString *dst, const struct UString *src,
+                      UErrorCode *status);
+
+U_CFUNC void ustr_cat(struct UString *dst, const struct UString *src,
+                      UErrorCode *status);
+
+U_CFUNC void ustr_ncat(struct UString *dst, const struct UString *src,
+                       int32_t n, UErrorCode *status);
+
+U_CFUNC void ustr_ucat(struct UString *dst, UChar c, UErrorCode *status);
+U_CFUNC void ustr_u32cat(struct UString *dst, UChar32 c, UErrorCode *status);
+U_CFUNC void ustr_uscat(struct UString *dst, const UChar* src,int len,UErrorCode *status);
+#endif
diff --git a/intl/icu/source/tools/genrb/wrtjava.cpp b/intl/icu/source/tools/genrb/wrtjava.cpp
new file mode 100644
index 0000000000..cb04b5a44a
--- /dev/null
+++ b/intl/icu/source/tools/genrb/wrtjava.cpp
@@ -0,0 +1,701 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 2000-2015, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*
+* File wrtjava.cpp
+*
+* Modification History:
+*
+*   Date        Name        Description
+*   01/11/02    Ram         Creation.
+*   02/12/08    Spieth      Fix errant 'new Object[][]{' insertion
+*   02/19/08    Spieth      Removed ICUListResourceBundle dependency
+*******************************************************************************
+*/
+
+#include <assert.h>
+#include "unicode/unistr.h"
+#include "reslist.h"
+#include "unewdata.h"
+#include "unicode/ures.h"
+#include "errmsg.h"
+#include "filestrm.h"
+#include "cstring.h"
+#include "unicode/ucnv.h"
+#include "genrb.h"
+#include "rle.h"
+#include "uhash.h"
+#include "uresimp.h"
+#include "unicode/ustring.h"
+#include "unicode/utf8.h"
+
+void res_write_java(struct SResource *res,UErrorCode *status);
+
+
+static const char copyRight[] =
+    "/* \n"
+    " *******************************************************************************\n"
+    " *\n"
+    " *   Copyright (C) International Business Machines\n"
+    " *   Corporation and others.  All Rights Reserved.\n"
+    " *\n"
+    " *******************************************************************************\n"
+    " * $" "Source:  $ \n"
+    " * $" "Date:  $ \n"
+    " * $" "Revision:  $ \n"
+    " *******************************************************************************\n"
+    " */\n\n";
+static const char warningMsg[] =
+    "/*********************************************************************\n"
+    "######################################################################\n"
+    "\n"
+    "   WARNING: This file is generated by genrb Version " GENRB_VERSION ".\n"
+    "            If you edit this file, please make sure that, the source\n"
+    "            of this file (XXXX.txt in LocaleElements_XXXX.java)\n"
+    "            is also edited.\n"
+    "######################################################################\n"
+    " *********************************************************************\n"
+    " */\n\n";
+static const char* openBrace="{\n";
+static const char* closeClass="    };\n"
+                              "}\n";
+
+static const char* javaClass =  "import java.util.ListResourceBundle;\n\n"
+                                "public class ";
+
+static const char* javaClass1=  " extends ListResourceBundle {\n\n"
+                                "    /**\n"
+                                "     * Overrides ListResourceBundle \n"
+                                "     */\n"
+                                "    public final Object[][] getContents() { \n"
+                                "          return  contents;\n"
+                                "    }\n\n"
+                                "    private static Object[][] contents = {\n";
+/*static const char* javaClassICU= " extends ListResourceBundle {\n\n"
+                                 "    public %s  () {\n"
+                                 "          super.contents = data;\n"
+                                 "    }\n"
+                                 "    static final Object[][] data = new Object[][] { \n";*/
+static int tabCount = 3;
+
+static FileStream* out=nullptr;
+static struct SRBRoot* srBundle ;
+/*static const char* outDir = nullptr;*/
+
+static const char* bName=nullptr;
+static const char* pName=nullptr;
+
+static void write_tabs(FileStream* os){
+    int i=0;
+    for(;i<=tabCount;i++){
+        T_FileStream_write(os,"    ",4);
+    }
+}
+
+#define ZERO 0x30
+
+static const char* enc ="";
+static UConverter* conv = nullptr;
+
+static int32_t
+uCharsToChars(char *target, int32_t targetLen, const char16_t *source, int32_t sourceLen, UErrorCode *status) {
+    int i=0, j=0;
+    char str[30]={'\0'};
+    while(i<sourceLen){
+        if (source[i] == '\n') {
+            if (j + 2 < targetLen) {
+                uprv_strcat(target, "\\n");
+            }
+            j += 2;
+        }else if(source[i]==0x0D){
+            if(j+2<targetLen){
+                uprv_strcat(target,"\\f");
+            }
+            j+=2;
+        }else if(source[i] == '"'){
+            if(source[i-1]=='\''){
+                if(j+2<targetLen){
+                    uprv_strcat(target,"\\");
+                    target[j+1]= (char)source[i];
+                }
+                j+=2;
+            }else if(source[i-1]!='\\'){
+
+                if(j+2<targetLen){
+                    uprv_strcat(target,"\\");
+                    target[j+1]= (char)source[i];
+                }
+                j+=2;
+            }else if(source[i-1]=='\\'){
+                target[j++]= (char)source[i];
+            }
+        }else if(source[i]=='\\'){
+            if(i+1<sourceLen){
+                switch(source[i+1]){
+                case ',':
+                case '!':
+                case '?':
+                case '#':
+                case '.':
+                case '%':
+                case '&':
+                case ':':
+                case ';':
+                    if(j+2<targetLen){
+                       uprv_strcat(target,"\\\\");
+                    }
+                    j+=2;
+                    break;
+                case '"':
+                case '\'':
+                    if(j+3<targetLen){
+                       uprv_strcat(target,"\\\\\\");
+                    }
+                    j+=3;
+                    break;
+                default :
+                    if(j<targetLen){
+                        target[j]=(char)source[i];
+                    }
+                    j++;
+                    break;
+                }
+            }else{
+                if(j<targetLen){
+                    uprv_strcat(target,"\\\\");
+                }
+                j+=2;
+            }
+        }else if(source[i]>=0x20 && source[i]<0x7F/*ASCII*/){
+            if(j<targetLen){
+                target[j] = (char) source[i];
+            }
+            j++;
+        }else{
+            if(*enc =='\0' || source[i]==0x0000){
+                uprv_strcpy(str,"\\u");
+                itostr(str+2,source[i],16,4);
+                if(j+6<targetLen){
+                    uprv_strcat(target,str);
+                }
+                j+=6;
+            }else{
+                char dest[30] = {0};
+                int retVal=ucnv_fromUChars(conv,dest,30,source+i,1,status);
+                if(U_FAILURE(*status)){
+                    return 0;
+                }
+                if(j+retVal<targetLen){
+                    uprv_strcat(target,dest);
+                }
+                j+=retVal;
+            }
+        }
+        i++;
+    }
+    return j;
+}
+
+
+static uint32_t
+strrch(const char* source,uint32_t sourceLen,char find){
+    const char* tSourceEnd =source + (sourceLen-1);
+    while(tSourceEnd>= source){
+        if(*tSourceEnd==find){
+            return (uint32_t)(tSourceEnd-source);
+        }
+        tSourceEnd--;
+    }
+    return (uint32_t)(tSourceEnd-source);
+}
+
+static int32_t getColumnCount(int32_t len){
+    int32_t columnCount = 80;
+    int32_t maxLines = 3000;
+    int32_t adjustedLen = len*5; /* assume that every codepoint is represented in \uXXXX format*/
+    /*
+     * calculate the number of lines that
+     * may be required if column count is 80
+     */
+    if (maxLines  < (adjustedLen / columnCount) ){
+        columnCount = adjustedLen / maxLines;
+    }
+    return columnCount;
+}
+static void
+str_write_java(const char16_t *src, int32_t srcLen, UBool printEndLine, UErrorCode *status) {
+
+    uint32_t length = srcLen*8;
+    uint32_t bufLen = 0;
+    uint32_t columnCount;
+    char* buf = (char*) malloc(sizeof(char)*length);
+
+    if(buf == nullptr) {
+        *status = U_MEMORY_ALLOCATION_ERROR;
+        return;
+    }
+
+    columnCount = getColumnCount(srcLen);
+    memset(buf,0,length);
+
+    bufLen = uCharsToChars(buf,length,src,srcLen,status);
+    // buflen accounts for extra bytes added due to multi byte encoding of
+    //        non ASCII characters
+    if(printEndLine)
+        write_tabs(out);
+
+    if(U_FAILURE(*status)){
+        uprv_free(buf);
+        return;
+    }
+
+    if(bufLen+(tabCount*4) > columnCount  ){
+        uint32_t len = 0;
+        char* current = buf;
+        uint32_t add;
+        while(len < bufLen){
+            add = columnCount-(tabCount*4)-5/* for ", +\n */;
+            current = buf +len;
+            if (add < (bufLen-len)) {
+                uint32_t idx = strrch(current,add,'\\');
+                if (idx > add) {
+                    idx = add;
+                } else {
+                    int32_t num =idx-1;
+                    uint32_t seqLen;
+                    while(num>0){
+                        if(current[num]=='\\'){
+                            num--;
+                        }else{
+                            break;
+                        }
+                    }
+                    if ((idx-num)%2==0) {
+                        idx--;
+                    }
+                    seqLen = (current[idx+1]=='u') ? 6 : 2;
+                    if ((add-idx) < seqLen) {
+                        add = idx + seqLen;
+                    }
+                }
+            }
+            T_FileStream_write(out,"\"",1);
+            uint32_t byteIndex = 0;
+            uint32_t trailBytes = 0;
+            if(len+add<bufLen){
+                // check the trail bytes to be added to the output line
+                while (byteIndex < add) {
+                    if (U8_IS_LEAD(*(current + byteIndex))) {
+                        trailBytes = U8_COUNT_TRAIL_BYTES(*(current + byteIndex));
+                        add += trailBytes;
+                    }
+                    byteIndex++;
+                }
+                T_FileStream_write(out,current,add);
+                if (len + add < bufLen) {
+                    T_FileStream_write(out,"\" +\n",4);
+                    write_tabs(out);
+                }
+            }else{
+                T_FileStream_write(out,current,bufLen-len);
+            }
+            len+=add;
+        }
+    }else{
+        T_FileStream_write(out,"\"",1);
+        T_FileStream_write(out, buf,bufLen);
+    }
+    if(printEndLine){
+        T_FileStream_write(out,"\",\n",3);
+    }else{
+        T_FileStream_write(out,"\"",1);
+    }
+    uprv_free(buf);
+}
+
+/* Writing Functions */
+static void
+string_write_java(const StringResource *res,UErrorCode *status) {
+    (void)res->getKeyString(srBundle);
+
+    str_write_java(res->getBuffer(), res->length(), true, status);
+}
+
+static void
+array_write_java(const ArrayResource *res, UErrorCode *status) {
+
+    uint32_t  i         = 0;
+    const char* arr ="new String[] { \n";
+    struct SResource *current = nullptr;
+    UBool allStrings    = true;
+
+    if (U_FAILURE(*status)) {
+        return;
+    }
+
+    if (res->fCount > 0) {
+
+        current = res->fFirst;
+        i = 0;
+        while(current != nullptr){
+            if(!current->isString()){
+                allStrings = false;
+                break;
+            }
+            current= current->fNext;
+        }
+
+        current = res->fFirst;
+        if(allStrings==false){
+            const char* object = "new Object[]{\n";
+            write_tabs(out);
+            T_FileStream_write(out, object, (int32_t)uprv_strlen(object));
+            tabCount++;
+        }else{
+            write_tabs(out);
+            T_FileStream_write(out, arr, (int32_t)uprv_strlen(arr));
+            tabCount++;
+        }
+        while (current != nullptr) {
+            /*if(current->isString()){
+                write_tabs(out);
+            }*/
+            res_write_java(current, status);
+            if(U_FAILURE(*status)){
+                return;
+            }
+            i++;
+            current = current->fNext;
+        }
+        T_FileStream_write(out,"\n",1);
+
+        tabCount--;
+        write_tabs(out);
+        T_FileStream_write(out,"},\n",3);
+
+    } else {
+        write_tabs(out);
+        T_FileStream_write(out,arr,(int32_t)uprv_strlen(arr));
+        write_tabs(out);
+        T_FileStream_write(out,"},\n",3);
+    }
+}
+
+static void
+intvector_write_java(const IntVectorResource *res, UErrorCode * /*status*/) {
+    uint32_t i = 0;
+    const char* intArr = "new int[] {\n";
+    /* const char* intC   = "new Integer(";   */
+    const char* stringArr = "new String[]{\n";
+    const char *resname = res->getKeyString(srBundle);
+    char buf[100];
+    int len =0;
+    buf[0]=0;
+    write_tabs(out);
+
+    if(resname != nullptr && uprv_strcmp(resname,"DateTimeElements")==0){
+        T_FileStream_write(out, stringArr, (int32_t)uprv_strlen(stringArr));
+        tabCount++;
+        for(i = 0; i<res->fCount; i++) {
+            write_tabs(out);
+            len=itostr(buf,res->fArray[i],10,0);
+            T_FileStream_write(out,"\"",1);
+            T_FileStream_write(out,buf,len);
+            T_FileStream_write(out,"\",",2);
+            T_FileStream_write(out,"\n",1);
+        }
+    }else{
+        T_FileStream_write(out, intArr, (int32_t)uprv_strlen(intArr));
+        tabCount++;
+        for(i = 0; i<res->fCount; i++) {
+            write_tabs(out);
+            /* T_FileStream_write(out, intC, (int32_t)uprv_strlen(intC)); */
+            len=itostr(buf,res->fArray[i],10,0);
+            T_FileStream_write(out,buf,len);
+            /* T_FileStream_write(out,"),",2);  */
+            /* T_FileStream_write(out,"\n",1);  */
+            T_FileStream_write(out,",\n",2);
+        }
+    }
+    tabCount--;
+    write_tabs(out);
+    T_FileStream_write(out,"},\n",3);
+}
+
+static void
+int_write_java(const IntResource *res, UErrorCode * /*status*/) {
+    const char* intC   =  "new Integer(";
+    char buf[100];
+    int len =0;
+    buf[0]=0;
+
+    /* write the binary data */
+    write_tabs(out);
+    T_FileStream_write(out, intC, (int32_t)uprv_strlen(intC));
+    len=itostr(buf, res->fValue, 10, 0);
+    T_FileStream_write(out,buf,len);
+    T_FileStream_write(out,"),\n",3 );
+
+}
+
+static void
+bytes_write_java(const BinaryResource *res, UErrorCode * /*status*/) {
+	const char* type  = "new byte[] {";
+	const char* byteDecl = "%i, ";
+    char byteBuffer[100] = { 0 };
+	uint8_t*  byteArray = nullptr;
+    int byteIterator = 0;
+    int32_t srcLen=res->fLength;
+    if(srcLen>0 )
+	{
+        byteArray = res->fData;
+
+        write_tabs(out);
+        T_FileStream_write(out, type, (int32_t)uprv_strlen(type));
+        T_FileStream_write(out, "\n", 1);
+        tabCount++;
+
+		for (;byteIterator<srcLen;byteIterator++)
+		{
+            if (byteIterator%16 == 0)
+			{
+			    write_tabs(out);
+			}
+
+			if (byteArray[byteIterator] < 128)
+			{
+                snprintf(byteBuffer, sizeof(byteBuffer), byteDecl, byteArray[byteIterator]);
+			}
+			else
+			{
+                snprintf(byteBuffer, sizeof(byteBuffer), byteDecl, (byteArray[byteIterator]-256));
+			}
+
+            T_FileStream_write(out, byteBuffer, (int32_t)uprv_strlen(byteBuffer));
+
+			if (byteIterator%16 == 15)
+			{
+                T_FileStream_write(out, "\n", 1);
+			}
+
+		}
+
+        if (((byteIterator-1)%16) != 15)
+		{
+            T_FileStream_write(out, "\n", 1);
+	    }
+
+		tabCount--;
+        write_tabs(out);
+		T_FileStream_write(out, "},\n", 3);
+
+	}
+	else
+    {
+		/* Empty array */
+        write_tabs(out);
+        T_FileStream_write(out,type,(int32_t)uprv_strlen(type));
+		T_FileStream_write(out,"},\n",3);
+    }
+
+}
+
+static UBool start = true;
+
+static void
+table_write_java(const TableResource *res, UErrorCode *status) {
+    uint32_t  i         = 0;
+    struct SResource *current = nullptr;
+    const char* obj = "new Object[][]{\n";
+
+    if (U_FAILURE(*status)) {
+        return ;
+    }
+
+    if (res->fCount > 0) {
+        if(start==false){
+            write_tabs(out);
+            T_FileStream_write(out, obj, (int32_t)uprv_strlen(obj));
+            tabCount++;
+        }
+        start = false;
+        current = res->fFirst;
+        i       = 0;
+
+
+        while (current != nullptr) {
+            const char *currentKeyString = current->getKeyString(srBundle);
+
+            assert(i < res->fCount);
+            write_tabs(out);
+
+            T_FileStream_write(out, openBrace, 2);
+
+
+            tabCount++;
+
+            write_tabs(out);
+            if(currentKeyString != nullptr) {
+                T_FileStream_write(out, "\"", 1);
+                T_FileStream_write(out, currentKeyString,
+                                   (int32_t)uprv_strlen(currentKeyString));
+                T_FileStream_write(out, "\",\n", 2);
+
+                T_FileStream_write(out, "\n", 1);
+            }
+            res_write_java(current, status);
+            if(U_FAILURE(*status)){
+                return;
+            }
+            i++;
+            current = current->fNext;
+            tabCount--;
+            write_tabs(out);
+            T_FileStream_write(out, "},\n", 3);
+        }
+        if(tabCount>4){
+            tabCount--;
+            write_tabs(out);
+            T_FileStream_write(out, "},\n", 3);
+        }
+
+    } else {
+        write_tabs(out);
+        T_FileStream_write(out,obj,(int32_t)uprv_strlen(obj));
+
+        write_tabs(out);
+        T_FileStream_write(out,"},\n",3);
+
+    }
+
+}
+
+void
+res_write_java(struct SResource *res,UErrorCode *status) {
+
+    if (U_FAILURE(*status)) {
+        return ;
+    }
+
+    if (res != nullptr) {
+        switch (res->fType) {
+        case URES_STRING:
+             string_write_java    (static_cast<const StringResource *>(res), status);
+             return;
+        case URES_ALIAS:
+             printf("Encountered unsupported resource type %d of alias\n", res->fType);
+             *status = U_UNSUPPORTED_ERROR;
+			 return;
+        case URES_INT_VECTOR:
+             intvector_write_java (static_cast<const IntVectorResource *>(res), status);
+             return;
+        case URES_BINARY:
+             bytes_write_java     (static_cast<const BinaryResource *>(res), status);
+             return;
+        case URES_INT:
+             int_write_java       (static_cast<const IntResource *>(res), status);
+             return;
+        case URES_ARRAY:
+             array_write_java     (static_cast<const ArrayResource *>(res), status);
+             return;
+        case URES_TABLE:
+             table_write_java     (static_cast<const TableResource *>(res), status);
+             return;
+        default:
+            break;
+        }
+    }
+
+    *status = U_INTERNAL_PROGRAM_ERROR;
+}
+
+void
+bundle_write_java(struct SRBRoot *bundle, const char *outputDir,const char* outputEnc,
+                  char *writtenFilename, int writtenFilenameLen,
+                  const char* packageName, const char* bundleName,
+                  UErrorCode *status) {
+
+    char fileName[256] = {'\0'};
+    char className[256]={'\0'};
+    /*char constructor[1000] = { 0 };*/
+    /*UBool j1 =false;*/
+    /*outDir = outputDir;*/
+
+    start = true;                        /* Reset the start indicator*/
+
+    bName = (bundleName==nullptr) ? "LocaleElements" : bundleName;
+    pName = (packageName==nullptr)? "com.ibm.icu.impl.data" : packageName;
+
+    uprv_strcpy(className, bName);
+    srBundle = bundle;
+    if(uprv_strcmp(srBundle->fLocale,"root")!=0){
+        uprv_strcat(className,"_");
+        uprv_strcat(className,srBundle->fLocale);
+    }
+    if(outputDir){
+        uprv_strcpy(fileName, outputDir);
+        if(outputDir[uprv_strlen(outputDir)-1] !=U_FILE_SEP_CHAR){
+            uprv_strcat(fileName,U_FILE_SEP_STRING);
+        }
+        uprv_strcat(fileName,className);
+        uprv_strcat(fileName,".java");
+    }else{
+        uprv_strcat(fileName,className);
+        uprv_strcat(fileName,".java");
+    }
+
+    if (writtenFilename) {
+        uprv_strncpy(writtenFilename, fileName, writtenFilenameLen);
+    }
+
+    if (U_FAILURE(*status)) {
+        return;
+    }
+
+    out= T_FileStream_open(fileName,"w");
+
+    if(out==nullptr){
+        *status = U_FILE_ACCESS_ERROR;
+        return;
+    }
+    if(getIncludeCopyright()){
+        T_FileStream_write(out, copyRight, (int32_t)uprv_strlen(copyRight));
+        T_FileStream_write(out, warningMsg, (int32_t)uprv_strlen(warningMsg));
+    }
+    T_FileStream_write(out,"package ",(int32_t)uprv_strlen("package "));
+    T_FileStream_write(out,pName,(int32_t)uprv_strlen(pName));
+    T_FileStream_write(out,";\n\n",3);
+    T_FileStream_write(out, javaClass, (int32_t)uprv_strlen(javaClass));
+    T_FileStream_write(out, className, (int32_t)uprv_strlen(className));
+	T_FileStream_write(out, javaClass1, (int32_t)uprv_strlen(javaClass1));
+
+    /* if(j1){
+          T_FileStream_write(out, javaClass1, (int32_t)uprv_strlen(javaClass1));
+       }else{
+           sprintf(constructor,javaClassICU,className);
+           T_FileStream_write(out, constructor, (int32_t)uprv_strlen(constructor));
+       }
+    */
+
+    if(outputEnc && *outputEnc!='\0'){
+        /* store the output encoding */
+        enc = outputEnc;
+        conv=ucnv_open(enc,status);
+        if(U_FAILURE(*status)){
+            return;
+        }
+    }
+    res_write_java(bundle->fRoot, status);
+
+    T_FileStream_write(out, closeClass, (int32_t)uprv_strlen(closeClass));
+
+    T_FileStream_close(out);
+
+    ucnv_close(conv);
+}
diff --git a/intl/icu/source/tools/genrb/wrtxml.cpp b/intl/icu/source/tools/genrb/wrtxml.cpp
new file mode 100644
index 0000000000..16f67fabca
--- /dev/null
+++ b/intl/icu/source/tools/genrb/wrtxml.cpp
@@ -0,0 +1,1213 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 2002-2015, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*
+* File wrtxml.cpp
+*
+* Modification History:
+*
+*   Date        Name        Description
+*   10/01/02    Ram         Creation.
+*   02/07/08    Spieth      Correct XLIFF generation on EBCDIC platform
+*
+*******************************************************************************
+*/
+
+// Safer use of UnicodeString.
+#ifndef UNISTR_FROM_CHAR_EXPLICIT
+#   define UNISTR_FROM_CHAR_EXPLICIT explicit
+#endif
+
+// Less important, but still a good idea.
+#ifndef UNISTR_FROM_STRING_EXPLICIT
+#   define UNISTR_FROM_STRING_EXPLICIT explicit
+#endif
+
+#include "reslist.h"
+#include "unewdata.h"
+#include "unicode/ures.h"
+#include "errmsg.h"
+#include "filestrm.h"
+#include "cstring.h"
+#include "unicode/ucnv.h"
+#include "genrb.h"
+#include "rle.h"
+#include "uhash.h"
+#include "uresimp.h"
+#include "unicode/ustring.h"
+#include "unicode/uchar.h"
+#include "ustr.h"
+#include "prscmnts.h"
+#include "unicode/unistr.h"
+#include "unicode/utf8.h"
+#include "unicode/utf16.h"
+#include <time.h>
+
+U_NAMESPACE_USE
+
+static int tabCount = 0;
+
+static FileStream* out=nullptr;
+static struct SRBRoot* srBundle ;
+static const char* outDir = nullptr;
+static const char* enc ="";
+static UConverter* conv = nullptr;
+
+const char* const* ISOLanguages;
+const char* const* ISOCountries;
+const char* textExt = ".txt";
+const char* xliffExt = ".xlf";
+
+static int32_t write_utf8_file(FileStream* fileStream, UnicodeString outString)
+{
+    UErrorCode status = U_ZERO_ERROR;
+    int32_t len = 0;
+
+    // preflight to get the destination buffer size
+    u_strToUTF8(nullptr,
+                0,
+                &len,
+                toUCharPtr(outString.getBuffer()),
+                outString.length(),
+                &status);
+
+    // allocate the buffer
+    char* dest = (char*)uprv_malloc(len);
+    status = U_ZERO_ERROR;
+
+    // convert the data
+    u_strToUTF8(dest,
+                len,
+                &len,
+                toUCharPtr(outString.getBuffer()),
+                outString.length(),
+                &status);
+
+    // write data to out file
+    int32_t ret = T_FileStream_write(fileStream, dest, len);
+    uprv_free(dest);
+    return (ret);
+}
+
+/*write indentation for formatting*/
+static void write_tabs(FileStream* os){
+    int i=0;
+    for(;i<=tabCount;i++){
+        write_utf8_file(os,UnicodeString("    "));
+    }
+}
+
+/*get ID for each element. ID is globally unique.*/
+static char* getID(const char* id, const char* curKey, char* result) {
+    if(curKey == nullptr) {
+        result = (char *)uprv_malloc(sizeof(char)*uprv_strlen(id) + 1);
+        uprv_memset(result, 0, sizeof(char)*uprv_strlen(id) + 1);
+        uprv_strcpy(result, id);
+    } else {
+        result = (char *)uprv_malloc(sizeof(char)*(uprv_strlen(id) + 1 + uprv_strlen(curKey)) + 1);
+        uprv_memset(result, 0, sizeof(char)*(uprv_strlen(id) + 1 + uprv_strlen(curKey)) + 1);
+        if(id[0]!='\0'){
+            uprv_strcpy(result, id);
+            uprv_strcat(result, "_");
+        }
+        uprv_strcat(result, curKey);
+    }
+    return result;
+}
+
+/*compute CRC for binary code*/
+/* The code is from  http://www.theorem.com/java/CRC32.java
+ * Calculates the CRC32 - 32 bit Cyclical Redundancy Check
+ * <P> This check is used in numerous systems to verify the integrity
+ * of information.  It's also used as a hashing function.  Unlike a regular
+ * checksum, it's sensitive to the order of the characters.
+ * It produces a 32 bit
+ *
+ * @author Michael Lecuyer (mjl@theorem.com)
+ * @version 1.1 August 11, 1998
+ */
+
+/* ICU is not endian portable, because ICU data generated on big endian machines can be
+ * ported to big endian machines but not to little endian machines and vice versa. The
+ * conversion is not portable across platforms with different endianness.
+ */
+
+uint32_t computeCRC(const char *ptr, uint32_t len, uint32_t lastcrc){
+    int32_t crc;
+    uint32_t temp1;
+    uint32_t temp2;
+
+    int32_t crc_ta[256];
+    int i = 0;
+    int j = 0;
+    uint32_t crc2 = 0;
+
+#define CRC32_POLYNOMIAL 0xEDB88320
+
+    /*build crc table*/
+    for (i = 0; i <= 255; i++) {
+        crc2 = i;
+        for (j = 8; j > 0; j--) {
+            if ((crc2 & 1) == 1) {
+                crc2 = (crc2 >> 1) ^ CRC32_POLYNOMIAL;
+            } else {
+                crc2 >>= 1;
+            }
+        }
+        crc_ta[i] = crc2;
+    }
+
+    crc = lastcrc;
+    while(len--!=0) {
+        temp1 = (uint32_t)crc>>8;
+        temp2 = crc_ta[(crc^*ptr) & 0xFF];
+        crc = temp1^temp2;
+        ptr++;
+    }
+    return(crc);
+}
+
+static void strnrepchr(char* src, int32_t srcLen, char s, char r){
+    int32_t i = 0;
+    for(i=0;i<srcLen;i++){
+        if(src[i]==s){
+            src[i]=r;
+        }
+    }
+}
+/* Parse the filename, and get its language information.
+ * If it fails to get the language information from the filename,
+ * use "en" as the default value for language
+ */
+static char* parseFilename(const char* id, char* /*lang*/) {
+    int idLen = (int) uprv_strlen(id);
+    char* localeID = (char*) uprv_malloc(idLen);
+    int pos = 0;
+    int canonCapacity = 0;
+    char* canon = nullptr;
+    int canonLen = 0;
+    /*int i;*/
+    UErrorCode status = U_ZERO_ERROR;
+    const char *ext = uprv_strchr(id, '.');
+
+    if(ext != nullptr){
+        pos = (int) (ext - id);
+    } else {
+        pos = idLen;
+    }
+    uprv_memcpy(localeID, id, pos);
+    localeID[pos]=0; /* NUL terminate the string */
+
+    canonCapacity =pos*3;
+    canon = (char*) uprv_malloc(canonCapacity);
+    canonLen = uloc_canonicalize(localeID, canon, canonCapacity, &status);
+
+    if(U_FAILURE(status)){
+        fprintf(stderr, "Could not canonicalize the locale ID: %s. Error: %s\n", localeID, u_errorName(status));
+        exit(status);
+    }
+    strnrepchr(canon, canonLen, '_', '-');
+    return canon;
+}
+
+static const char* xmlHeader = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n";
+#if 0
+static const char* bundleStart = "<xliff version = \"1.2\" "
+                                        "xmlns='urn:oasis:names:tc:xliff:document:1.2' "
+                                        "xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' "
+                                        "xsi:schemaLocation='urn:oasis:names:tc:xliff:document:1.2 xliff-core-1.2-transitional.xsd'>\n";
+#else
+static const char* bundleStart = "<xliff version = \"1.1\" "
+                                        "xmlns='urn:oasis:names:tc:xliff:document:1.1' "
+                                        "xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' "
+                                        "xsi:schemaLocation='urn:oasis:names:tc:xliff:document:1.1 http://www.oasis-open.org/committees/xliff/documents/xliff-core-1.1.xsd'>\n";
+#endif
+static const char* bundleEnd   = "</xliff>\n";
+
+void res_write_xml(struct SResource *res, const char* id, const char* language, UBool isTopLevel, UErrorCode *status);
+
+static char* convertAndEscape(char** pDest, int32_t destCap, int32_t* destLength,
+                              const char16_t* src, int32_t srcLen, UErrorCode* status){
+    int32_t srcIndex=0;
+    char* dest=nullptr;
+    char* temp=nullptr;
+    int32_t destLen=0;
+    UChar32 c = 0;
+
+    if(status==nullptr || U_FAILURE(*status) || pDest==nullptr  || srcLen==0 || src == nullptr){
+        return nullptr;
+    }
+    dest =*pDest;
+    if(dest==nullptr || destCap <=0){
+        destCap = srcLen * 8;
+        dest = (char*) uprv_malloc(sizeof(char) * destCap);
+        if(dest==nullptr){
+            *status=U_MEMORY_ALLOCATION_ERROR;
+            return nullptr;
+        }
+    }
+
+    dest[0]=0;
+
+    while(srcIndex<srcLen){
+        U16_NEXT(src, srcIndex, srcLen, c);
+
+        if (U16_IS_LEAD(c) || U16_IS_TRAIL(c)) {
+            *status = U_ILLEGAL_CHAR_FOUND;
+            fprintf(stderr, "Illegal Surrogate! \n");
+            uprv_free(dest);
+            return nullptr;
+        }
+
+        if((destLen+U8_LENGTH(c)) < destCap){
+
+            /* ASCII Range */
+            if(c <=0x007F){
+                switch(c) {
+                case '\x26':
+                    uprv_strcpy(dest+( destLen),"\x26\x61\x6d\x70\x3b"); /* &amp;*/
+                    destLen+=(int32_t)uprv_strlen("\x26\x61\x6d\x70\x3b");
+                    break;
+                case '\x3c':
+                    uprv_strcpy(dest+(destLen),"\x26\x6c\x74\x3b"); /* &lt;*/
+                    destLen+=(int32_t)uprv_strlen("\x26\x6c\x74\x3b");
+                    break;
+                case '\x3e':
+                    uprv_strcpy(dest+(destLen),"\x26\x67\x74\x3b"); /* &gt;*/
+                    destLen+=(int32_t)uprv_strlen("\x26\x67\x74\x3b");
+                    break;
+                case '\x22':
+                    uprv_strcpy(dest+(destLen),"\x26\x71\x75\x6f\x74\x3b"); /* &quot;*/
+                    destLen+=(int32_t)uprv_strlen("\x26\x71\x75\x6f\x74\x3b");
+                    break;
+                case '\x27':
+                    uprv_strcpy(dest+(destLen),"\x26\x61\x70\x6f\x73\x3b"); /* &apos; */
+                    destLen+=(int32_t)uprv_strlen("\x26\x61\x70\x6f\x73\x3b");
+                    break;
+
+                 /* Disallow C0 controls except TAB, CR, LF*/
+                case 0x00:
+                case 0x01:
+                case 0x02:
+                case 0x03:
+                case 0x04:
+                case 0x05:
+                case 0x06:
+                case 0x07:
+                case 0x08:
+                /*case 0x09:*/
+                /*case 0x0A: */
+                case 0x0B:
+                case 0x0C:
+                /*case 0x0D:*/
+                case 0x0E:
+                case 0x0F:
+                case 0x10:
+                case 0x11:
+                case 0x12:
+                case 0x13:
+                case 0x14:
+                case 0x15:
+                case 0x16:
+                case 0x17:
+                case 0x18:
+                case 0x19:
+                case 0x1A:
+                case 0x1B:
+                case 0x1C:
+                case 0x1D:
+                case 0x1E:
+                case 0x1F:
+                    *status = U_ILLEGAL_CHAR_FOUND;
+                    fprintf(stderr, "Illegal Character \\u%04X!\n",(int)c);
+                    uprv_free(dest);
+                    return nullptr;
+                default:
+                    dest[destLen++]=(char)c;
+                }
+            }else{
+                UBool isError = false;
+                U8_APPEND((unsigned char*)dest,destLen,destCap,c,isError);
+                if(isError){
+                    *status = U_ILLEGAL_CHAR_FOUND;
+                    fprintf(stderr, "Illegal Character \\U%08X!\n",(int)c);
+                    uprv_free(dest);
+                    return nullptr;
+                }
+            }
+        }else{
+            destCap += destLen;
+
+            temp = (char*) uprv_malloc(sizeof(char)*destCap);
+            if(temp==nullptr){
+                *status=U_MEMORY_ALLOCATION_ERROR;
+                uprv_free(dest);
+                return nullptr;
+            }
+            uprv_memmove(temp,dest,destLen);
+            destLen=0;
+            uprv_free(dest);
+            dest=temp;
+            temp=nullptr;
+        }
+
+    }
+    *destLength = destLen;
+    return dest;
+}
+
+#define ASTERISK 0x002A
+#define SPACE    0x0020
+#define CR       0x000A
+#define LF       0x000D
+#define AT_SIGN  0x0040
+
+#if UCONFIG_NO_REGULAR_EXPRESSIONS==0
+static void
+trim(char **src, int32_t *len){
+
+    char *s = nullptr;
+    int32_t i = 0;
+    if(src == nullptr || *src == nullptr){
+        return;
+    }
+    s = *src;
+    /* trim from the end */
+    for( i=(*len-1); i>= 0; i--){
+        switch(s[i]){
+        case ASTERISK:
+        case SPACE:
+        case CR:
+        case LF:
+            s[i] = 0;
+            continue;
+        default:
+            break;
+        }
+        break;
+
+    }
+    *len = i+1;
+}
+
+static void
+print(char16_t* src, int32_t srcLen,const char *tagStart,const char *tagEnd,  UErrorCode *status){
+    int32_t bufCapacity   = srcLen*4;
+    char *buf       = nullptr;
+    int32_t bufLen = 0;
+
+    if(U_FAILURE(*status)){
+        return;
+    }
+
+    buf = (char*) (uprv_malloc(bufCapacity));
+    if(buf==0){
+        fprintf(stderr, "Could not allocate memory!!");
+        exit(U_MEMORY_ALLOCATION_ERROR);
+    }
+    buf = convertAndEscape(&buf, bufCapacity, &bufLen, src, srcLen,status);
+    if(U_SUCCESS(*status)){
+        trim(&buf,&bufLen);
+        write_utf8_file(out,UnicodeString(tagStart));
+        write_utf8_file(out,UnicodeString(buf, bufLen, "UTF-8"));
+        write_utf8_file(out,UnicodeString(tagEnd));
+        write_utf8_file(out,UnicodeString("\n"));
+
+    }
+}
+#endif
+
+static void
+printNoteElements(const UString *src, UErrorCode *status){
+
+#if UCONFIG_NO_REGULAR_EXPRESSIONS==0 /* donot compile when no RegularExpressions are available */
+
+    int32_t capacity = 0;
+    char16_t* note = nullptr;
+    int32_t noteLen = 0;
+    int32_t count = 0,i;
+
+    if(src == nullptr){
+        return;
+    }
+
+    capacity = src->fLength;
+    note  = (char16_t*) uprv_malloc(U_SIZEOF_UCHAR * capacity);
+
+    count = getCount(src->fChars,src->fLength, UPC_NOTE, status);
+    if(U_FAILURE(*status)){
+        uprv_free(note);
+        return;
+    }
+    for(i=0; i < count; i++){
+        noteLen =  getAt(src->fChars,src->fLength, &note, capacity, i, UPC_NOTE, status);
+        if(U_FAILURE(*status)){
+            uprv_free(note);
+            return;
+        }
+        if(noteLen > 0){
+            write_tabs(out);
+            print(note, noteLen,"<note>", "</note>", status);
+        }
+    }
+    uprv_free(note);
+#else
+
+    fprintf(stderr, "Warning: Could not output comments to XLIFF file. ICU has been built without RegularExpression support.\n");
+
+#endif /* UCONFIG_NO_REGULAR_EXPRESSIONS */
+
+}
+
+static void printAttribute(const char *name, const char *value, int32_t /*len*/)
+{
+    write_utf8_file(out, UnicodeString(" "));
+    write_utf8_file(out, UnicodeString(name));
+    write_utf8_file(out, UnicodeString(" = \""));
+    write_utf8_file(out, UnicodeString(value));
+    write_utf8_file(out, UnicodeString("\""));
+}
+
+#if UCONFIG_NO_REGULAR_EXPRESSIONS==0 /* donot compile when no RegularExpressions are available */
+static void printAttribute(const char *name, const UnicodeString value, int32_t /*len*/)
+{
+    write_utf8_file(out, UnicodeString(" "));
+    write_utf8_file(out, UnicodeString(name));
+    write_utf8_file(out, UnicodeString(" = \""));
+    write_utf8_file(out, value);
+    write_utf8_file(out, UnicodeString("\""));
+}
+#endif
+
+static void
+printComments(struct UString *src, const char *resName, UBool printTranslate, UErrorCode *status){
+
+#if UCONFIG_NO_REGULAR_EXPRESSIONS==0 /* donot compile when no RegularExpressions are available */
+
+    if(status==nullptr || U_FAILURE(*status)){
+        return;
+    }
+
+    int32_t capacity = src->fLength + 1;
+    char* buf = nullptr;
+    int32_t bufLen = 0;
+    char16_t* desc  = (char16_t*) uprv_malloc(U_SIZEOF_UCHAR * capacity);
+    char16_t* trans = (char16_t*) uprv_malloc(U_SIZEOF_UCHAR * capacity);
+
+    int32_t descLen = 0, transLen=0;
+    if(desc==nullptr || trans==nullptr){
+        *status = U_MEMORY_ALLOCATION_ERROR;
+        uprv_free(desc);
+        uprv_free(trans);
+        return;
+    }
+    // TODO: make src const, stop modifying it in-place, make printContainer() take const resource, etc.
+    src->fLength = removeCmtText(src->fChars, src->fLength, status);
+    descLen  = getDescription(src->fChars,src->fLength, &desc, capacity, status);
+    transLen = getTranslate(src->fChars,src->fLength, &trans, capacity, status);
+
+    /* first print translate attribute */
+    if(transLen > 0){
+        if(printTranslate){
+            /* print translate attribute */
+            buf = convertAndEscape(&buf, 0, &bufLen, trans, transLen, status);
+            if(U_SUCCESS(*status)){
+                printAttribute("translate", UnicodeString(buf, bufLen, "UTF-8"), bufLen);
+                write_utf8_file(out,UnicodeString(">\n"));
+            }
+        }else if(getShowWarning()){
+            fprintf(stderr, "Warning: Translate attribute for resource %s cannot be set. XLIFF prohibits it.\n", resName);
+            /* no translate attribute .. just close the tag */
+            write_utf8_file(out,UnicodeString(">\n"));
+        }
+    }else{
+        /* no translate attribute .. just close the tag */
+        write_utf8_file(out,UnicodeString(">\n"));
+    }
+
+    if(descLen > 0){
+        write_tabs(out);
+        print(desc, descLen, "<!--", "-->", status);
+    }
+
+    uprv_free(desc);
+    uprv_free(trans);
+#else
+
+    fprintf(stderr, "Warning: Could not output comments to XLIFF file. ICU has been built without RegularExpression support.\n");
+
+#endif /* UCONFIG_NO_REGULAR_EXPRESSIONS */
+
+}
+
+/*
+ * Print out a containing element, like:
+ * <trans-unit id = "blah" resname = "blah" restype = "x-id-alias" translate = "no">
+ * <group id "calendar_gregorian" resname = "gregorian" restype = "x-icu-array">
+ */
+static char *printContainer(SResource *res, const char *container, const char *restype, const char *mimetype, const char *id, UErrorCode *status)
+{
+    const char *resname = nullptr;
+    char *sid = nullptr;
+
+    write_tabs(out);
+
+    resname = res->getKeyString(srBundle);
+    if (resname != nullptr && *resname != 0) {
+        sid = getID(id, resname, sid);
+    } else {
+        sid = getID(id, nullptr, sid);
+    }
+
+    write_utf8_file(out, UnicodeString("<"));
+    write_utf8_file(out, UnicodeString(container));
+    printAttribute("id", sid, (int32_t) uprv_strlen(sid));
+
+    if (resname != nullptr) {
+        printAttribute("resname", resname, (int32_t) uprv_strlen(resname));
+    }
+
+    if (mimetype != nullptr) {
+        printAttribute("mime-type", mimetype, (int32_t) uprv_strlen(mimetype));
+    }
+
+    if (restype != nullptr) {
+        printAttribute("restype", restype, (int32_t) uprv_strlen(restype));
+    }
+
+    tabCount += 1;
+    if (res->fComment.fLength > 0) {
+        /* printComments will print the closing ">\n" */
+        printComments(&res->fComment, resname, true, status);
+    } else {
+        write_utf8_file(out, UnicodeString(">\n"));
+    }
+
+    return sid;
+}
+
+/* Writing Functions */
+
+static const char *trans_unit = "trans-unit";
+static const char *close_trans_unit = "</trans-unit>\n";
+static const char *source = "<source>";
+static const char *close_source = "</source>\n";
+static const char *group = "group";
+static const char *close_group = "</group>\n";
+
+static const char *bin_unit = "bin-unit";
+static const char *close_bin_unit = "</bin-unit>\n";
+static const char *bin_source = "<bin-source>\n";
+static const char *close_bin_source = "</bin-source>\n";
+static const char *external_file = "<external-file";
+/*static const char *close_external_file = "</external-file>\n";*/
+static const char *internal_file = "<internal-file";
+static const char *close_internal_file = "</internal-file>\n";
+
+static const char *application_mimetype = "application"; /* add "/octet-stream"? */
+
+static const char *alias_restype     = "x-icu-alias";
+static const char *array_restype     = "x-icu-array";
+static const char *binary_restype    = "x-icu-binary";
+static const char *integer_restype   = "x-icu-integer";
+static const char *intvector_restype = "x-icu-intvector";
+static const char *table_restype     = "x-icu-table";
+
+static void
+string_write_xml(StringResource *res, const char* id, const char* /*language*/, UErrorCode *status) {
+
+    char *sid = nullptr;
+    char* buf = nullptr;
+    int32_t bufLen = 0;
+
+    if(status==nullptr || U_FAILURE(*status)){
+        return;
+    }
+
+    sid = printContainer(res, trans_unit, nullptr, nullptr, id, status);
+
+    write_tabs(out);
+
+    write_utf8_file(out, UnicodeString(source));
+
+    buf = convertAndEscape(&buf, 0, &bufLen, res->getBuffer(), res->length(), status);
+
+    if (U_FAILURE(*status)) {
+        return;
+    }
+
+    write_utf8_file(out, UnicodeString(buf, bufLen, "UTF-8"));
+    write_utf8_file(out, UnicodeString(close_source));
+
+    printNoteElements(&res->fComment, status);
+
+    tabCount -= 1;
+    write_tabs(out);
+
+    write_utf8_file(out, UnicodeString(close_trans_unit));
+
+    uprv_free(buf);
+    uprv_free(sid);
+}
+
+static void
+alias_write_xml(AliasResource *res, const char* id, const char* /*language*/, UErrorCode *status) {
+    char *sid = nullptr;
+    char* buf = nullptr;
+    int32_t bufLen=0;
+
+    sid = printContainer(res, trans_unit, alias_restype, nullptr, id, status);
+
+    write_tabs(out);
+
+    write_utf8_file(out, UnicodeString(source));
+
+    buf = convertAndEscape(&buf, 0, &bufLen, res->getBuffer(), res->length(), status);
+
+    if(U_FAILURE(*status)){
+        return;
+    }
+    write_utf8_file(out, UnicodeString(buf, bufLen, "UTF-8"));
+    write_utf8_file(out, UnicodeString(close_source));
+
+    printNoteElements(&res->fComment, status);
+
+    tabCount -= 1;
+    write_tabs(out);
+
+    write_utf8_file(out, UnicodeString(close_trans_unit));
+
+    uprv_free(buf);
+    uprv_free(sid);
+}
+
+static void
+array_write_xml(ArrayResource *res, const char* id, const char* language, UErrorCode *status) {
+    char* sid = nullptr;
+    int index = 0;
+
+    struct SResource *current = nullptr;
+
+    sid = printContainer(res, group, array_restype, nullptr, id, status);
+
+    current = res->fFirst;
+
+    while (current != nullptr) {
+        char c[256] = {0};
+        char* subId = nullptr;
+
+        itostr(c, index, 10, 0);
+        index += 1;
+        subId = getID(sid, c, subId);
+
+        res_write_xml(current, subId, language, false, status);
+        uprv_free(subId);
+        subId = nullptr;
+
+        if(U_FAILURE(*status)){
+            return;
+        }
+
+        current = current->fNext;
+    }
+
+    tabCount -= 1;
+    write_tabs(out);
+    write_utf8_file(out, UnicodeString(close_group));
+
+    uprv_free(sid);
+}
+
+static void
+intvector_write_xml(IntVectorResource *res, const char* id, const char* /*language*/, UErrorCode *status) {
+    char* sid = nullptr;
+    char* ivd = nullptr;
+    uint32_t i=0;
+    uint32_t len=0;
+    char buf[256] = {'0'};
+
+    sid = printContainer(res, group, intvector_restype, nullptr, id, status);
+
+    for(i = 0; i < res->fCount; i += 1) {
+        char c[256] = {0};
+
+        itostr(c, i, 10, 0);
+        ivd = getID(sid, c, ivd);
+        len = itostr(buf, res->fArray[i], 10, 0);
+
+        write_tabs(out);
+        write_utf8_file(out, UnicodeString("<"));
+        write_utf8_file(out, UnicodeString(trans_unit));
+
+        printAttribute("id", ivd, (int32_t)uprv_strlen(ivd));
+        printAttribute("restype", integer_restype, (int32_t) strlen(integer_restype));
+
+        write_utf8_file(out, UnicodeString(">\n"));
+
+        tabCount += 1;
+        write_tabs(out);
+        write_utf8_file(out, UnicodeString(source));
+
+        write_utf8_file(out, UnicodeString(buf, len));
+
+        write_utf8_file(out, UnicodeString(close_source));
+        tabCount -= 1;
+        write_tabs(out);
+        write_utf8_file(out, UnicodeString(close_trans_unit));
+
+        uprv_free(ivd);
+        ivd = nullptr;
+    }
+
+    tabCount -= 1;
+    write_tabs(out);
+
+    write_utf8_file(out, UnicodeString(close_group));
+    uprv_free(sid);
+    sid = nullptr;
+}
+
+static void
+int_write_xml(IntResource *res, const char* id, const char* /*language*/, UErrorCode *status) {
+    char* sid = nullptr;
+    char buf[256] = {0};
+    uint32_t len = 0;
+
+    sid = printContainer(res, trans_unit, integer_restype, nullptr, id, status);
+
+    write_tabs(out);
+
+    write_utf8_file(out, UnicodeString(source));
+
+    len = itostr(buf, res->fValue, 10, 0);
+    write_utf8_file(out, UnicodeString(buf, len));
+
+    write_utf8_file(out, UnicodeString(close_source));
+
+    printNoteElements(&res->fComment, status);
+
+    tabCount -= 1;
+    write_tabs(out);
+
+    write_utf8_file(out, UnicodeString(close_trans_unit));
+
+    uprv_free(sid);
+    sid = nullptr;
+}
+
+static void
+bin_write_xml(BinaryResource *res, const char* id, const char* /*language*/, UErrorCode *status) {
+    const char* m_type = application_mimetype;
+    char* sid = nullptr;
+    uint32_t crc = 0xFFFFFFFF;
+
+    char fileName[1024] ={0};
+    int32_t tLen = ( outDir == nullptr) ? 0 :(int32_t)uprv_strlen(outDir);
+    char* fn =  (char*) uprv_malloc(sizeof(char) * (tLen+1024 +
+                                                    (res->fFileName !=nullptr ?
+                                                    uprv_strlen(res->fFileName) :0)));
+    const char* ext = nullptr;
+
+    char* f = nullptr;
+
+    fn[0]=0;
+
+    if(res->fFileName != nullptr){
+        uprv_strcpy(fileName, res->fFileName);
+        f = uprv_strrchr(fileName, '\\');
+
+        if (f != nullptr) {
+            f++;
+        } else {
+            f = fileName;
+        }
+
+        ext = uprv_strrchr(fileName, '.');
+
+        if (ext == nullptr) {
+            fprintf(stderr, "Error: %s is an unknown binary filename type.\n", fileName);
+            exit(U_ILLEGAL_ARGUMENT_ERROR);
+        }
+
+        if(uprv_strcmp(ext, ".jpg")==0 || uprv_strcmp(ext, ".jpeg")==0 || uprv_strcmp(ext, ".gif")==0 ){
+            m_type = "image";
+        } else if(uprv_strcmp(ext, ".wav")==0 || uprv_strcmp(ext, ".au")==0 ){
+            m_type = "audio";
+        } else if(uprv_strcmp(ext, ".avi")==0 || uprv_strcmp(ext, ".mpg")==0 || uprv_strcmp(ext, ".mpeg")==0){
+            m_type = "video";
+        } else if(uprv_strcmp(ext, ".txt")==0 || uprv_strcmp(ext, ".text")==0){
+            m_type = "text";
+        }
+
+        sid = printContainer(res, bin_unit, binary_restype, m_type, id, status);
+
+        write_tabs(out);
+
+        write_utf8_file(out, UnicodeString(bin_source));
+
+        tabCount+= 1;
+        write_tabs(out);
+
+        write_utf8_file(out, UnicodeString(external_file));
+        printAttribute("href", f, (int32_t)uprv_strlen(f));
+        write_utf8_file(out, UnicodeString("/>\n"));
+        tabCount -= 1;
+        write_tabs(out);
+
+        write_utf8_file(out, UnicodeString(close_bin_source));
+
+        printNoteElements(&res->fComment, status);
+        tabCount -= 1;
+        write_tabs(out);
+        write_utf8_file(out, UnicodeString(close_bin_unit));
+    } else {
+        char temp[256] = {0};
+        uint32_t i = 0;
+        int32_t len=0;
+
+        sid = printContainer(res, bin_unit, binary_restype, m_type, id, status);
+
+        write_tabs(out);
+        write_utf8_file(out, UnicodeString(bin_source));
+
+        tabCount += 1;
+        write_tabs(out);
+
+        write_utf8_file(out, UnicodeString(internal_file));
+        printAttribute("form", application_mimetype, (int32_t) uprv_strlen(application_mimetype));
+
+        while(i <res->fLength){
+            len = itostr(temp, res->fData[i], 16, 2);
+            crc = computeCRC(temp, len, crc);
+            i++;
+        }
+
+        len = itostr(temp, crc, 10, 0);
+        printAttribute("crc", temp, len);
+
+        write_utf8_file(out, UnicodeString(">"));
+
+        i = 0;
+        while(i <res->fLength){
+            len = itostr(temp, res->fData[i], 16, 2);
+            write_utf8_file(out, UnicodeString(temp));
+            i += 1;
+        }
+
+        write_utf8_file(out, UnicodeString(close_internal_file));
+
+        tabCount -= 2;
+        write_tabs(out);
+
+        write_utf8_file(out, UnicodeString(close_bin_source));
+        printNoteElements(&res->fComment, status);
+
+        tabCount -= 1;
+        write_tabs(out);
+        write_utf8_file(out, UnicodeString(close_bin_unit));
+
+        uprv_free(sid);
+        sid = nullptr;
+    }
+
+    uprv_free(fn);
+}
+
+
+
+static void
+table_write_xml(TableResource *res, const char* id, const char* language, UBool isTopLevel, UErrorCode *status) {
+
+    struct SResource *current = nullptr;
+    char* sid = nullptr;
+
+    if (U_FAILURE(*status)) {
+        return ;
+    }
+
+    sid = printContainer(res, group, table_restype, nullptr, id, status);
+
+    if(isTopLevel) {
+        sid[0] = '\0';
+    }
+
+    current = res->fFirst;
+
+    while (current != nullptr) {
+        res_write_xml(current, sid, language, false, status);
+
+        if(U_FAILURE(*status)){
+            return;
+        }
+
+        current = current->fNext;
+    }
+
+    tabCount -= 1;
+    write_tabs(out);
+
+    write_utf8_file(out, UnicodeString(close_group));
+
+    uprv_free(sid);
+    sid = nullptr;
+}
+
+void
+res_write_xml(struct SResource *res, const char* id,  const char* language, UBool isTopLevel, UErrorCode *status) {
+
+    if (U_FAILURE(*status)) {
+        return ;
+    }
+
+    if (res != nullptr) {
+        switch (res->fType) {
+        case URES_STRING:
+             string_write_xml    (static_cast<StringResource *>(res), id, language, status);
+             return;
+
+        case URES_ALIAS:
+             alias_write_xml     (static_cast<AliasResource *>(res), id, language, status);
+             return;
+
+        case URES_INT_VECTOR:
+             intvector_write_xml (static_cast<IntVectorResource *>(res), id, language, status);
+             return;
+
+        case URES_BINARY:
+             bin_write_xml       (static_cast<BinaryResource *>(res), id, language, status);
+             return;
+
+        case URES_INT:
+             int_write_xml       (static_cast<IntResource *>(res), id, language, status);
+             return;
+
+        case URES_ARRAY:
+             array_write_xml     (static_cast<ArrayResource *>(res), id, language, status);
+             return;
+
+        case URES_TABLE:
+             table_write_xml     (static_cast<TableResource *>(res), id, language, isTopLevel, status);
+             return;
+
+        default:
+            break;
+        }
+    }
+
+    *status = U_INTERNAL_PROGRAM_ERROR;
+}
+
+void
+bundle_write_xml(struct SRBRoot *bundle, const char *outputDir,const char* outputEnc, const char* filename,
+                  char *writtenFilename, int writtenFilenameLen,
+                  const char* language, const char* outFileName, UErrorCode *status) {
+
+    char* xmlfileName = nullptr;
+    char* outputFileName = nullptr;
+    char* originalFileName = nullptr;
+    const char* fileStart = "<file xml:space = \"preserve\" source-language = \"";
+    const char* file1 = "\" datatype = \"x-icu-resource-bundle\" ";
+    const char* file2 = "original = \"";
+    const char* file4 = "\" date = \"";
+    const char* fileEnd = "</file>\n";
+    const char* headerStart = "<header>\n";
+    const char* headerEnd = "</header>\n";
+    const char* bodyStart = "<body>\n";
+    const char* bodyEnd = "</body>\n";
+
+    const char *tool_start = "<tool";
+    const char *tool_id = "genrb-" GENRB_VERSION "-icu-" U_ICU_VERSION;
+    const char *tool_name = "genrb";
+
+    char* temp = nullptr;
+    char* lang = nullptr;
+    const char* pos = nullptr;
+    int32_t first, index;
+    time_t currTime;
+    char timeBuf[128];
+
+    outDir = outputDir;
+
+    srBundle = bundle;
+
+    pos = uprv_strrchr(filename, '\\');
+    if(pos != nullptr) {
+        first = (int32_t)(pos - filename + 1);
+    } else {
+        first = 0;
+    }
+    index = (int32_t)(uprv_strlen(filename) - uprv_strlen(textExt) - first);
+    originalFileName = (char *)uprv_malloc(sizeof(char)*index+1);
+    uprv_memset(originalFileName, 0, sizeof(char)*index+1);
+    uprv_strncpy(originalFileName, filename + first, index);
+
+    if(uprv_strcmp(originalFileName, srBundle->fLocale) != 0) {
+        fprintf(stdout, "Warning: The file name is not same as the resource name!\n");
+    }
+
+    temp = originalFileName;
+    originalFileName = (char *)uprv_malloc(sizeof(char)* (uprv_strlen(temp)+uprv_strlen(textExt)) + 1);
+    uprv_memset(originalFileName, 0, sizeof(char)* (uprv_strlen(temp)+uprv_strlen(textExt)) + 1);
+    uprv_strcat(originalFileName, temp);
+    uprv_strcat(originalFileName, textExt);
+    uprv_free(temp);
+    temp = nullptr;
+
+
+    if (language == nullptr) {
+/*        lang = parseFilename(filename, lang);
+        if (lang == nullptr) {*/
+            /* now check if locale name is valid or not
+             * this is to cater for situation where
+             * pegasusServer.txt contains
+             *
+             * en{
+             *      ..
+             * }
+             */
+             lang = parseFilename(srBundle->fLocale, lang);
+             /*
+              * Neither  the file name nor the table name inside the
+              * txt file contain a valid country and language codes
+              * throw an error.
+              * pegasusServer.txt contains
+              *
+              * testelements{
+              *     ....
+              * }
+              */
+             if(lang==nullptr){
+                 fprintf(stderr, "Error: The file name and table name do not contain a valid language code. Please use -l option to specify it.\n");
+                 exit(U_ILLEGAL_ARGUMENT_ERROR);
+             }
+       /* }*/
+    } else {
+        lang = (char *)uprv_malloc(sizeof(char)*uprv_strlen(language) +1);
+        uprv_memset(lang, 0, sizeof(char)*uprv_strlen(language) +1);
+        uprv_strcpy(lang, language);
+    }
+
+    if(outFileName) {
+        outputFileName = (char *)uprv_malloc(sizeof(char)*uprv_strlen(outFileName) + 1);
+        uprv_memset(outputFileName, 0, sizeof(char)*uprv_strlen(outFileName) + 1);
+        uprv_strcpy(outputFileName,outFileName);
+    } else {
+        outputFileName = (char *)uprv_malloc(sizeof(char)*uprv_strlen(srBundle->fLocale) + 1);
+        uprv_memset(outputFileName, 0, sizeof(char)*uprv_strlen(srBundle->fLocale) + 1);
+        uprv_strcpy(outputFileName,srBundle->fLocale);
+    }
+
+    if(outputDir) {
+        xmlfileName = (char *)uprv_malloc(sizeof(char)*(uprv_strlen(outputDir) + uprv_strlen(outputFileName) + uprv_strlen(xliffExt) + 1) +1);
+        uprv_memset(xmlfileName, 0, sizeof(char)*(uprv_strlen(outputDir)+ uprv_strlen(outputFileName) + uprv_strlen(xliffExt) + 1) +1);
+    } else {
+        xmlfileName = (char *)uprv_malloc(sizeof(char)*(uprv_strlen(outputFileName) + uprv_strlen(xliffExt)) +1);
+        uprv_memset(xmlfileName, 0, sizeof(char)*(uprv_strlen(outputFileName) + uprv_strlen(xliffExt)) +1);
+    }
+
+    if(outputDir){
+        uprv_strcpy(xmlfileName, outputDir);
+        if(outputDir[uprv_strlen(outputDir)-1] !=U_FILE_SEP_CHAR){
+            uprv_strcat(xmlfileName,U_FILE_SEP_STRING);
+        }
+    }
+    uprv_strcat(xmlfileName,outputFileName);
+    uprv_strcat(xmlfileName,xliffExt);
+
+    if (writtenFilename) {
+        uprv_strncpy(writtenFilename, xmlfileName, writtenFilenameLen);
+    }
+
+    if (U_FAILURE(*status)) {
+        goto cleanup_bundle_write_xml;
+    }
+
+    out= T_FileStream_open(xmlfileName,"w");
+
+    if(out==nullptr){
+        *status = U_FILE_ACCESS_ERROR;
+        goto cleanup_bundle_write_xml;
+    }
+    write_utf8_file(out, UnicodeString(xmlHeader));
+
+    if(outputEnc && *outputEnc!='\0'){
+        /* store the output encoding */
+        enc = outputEnc;
+        conv=ucnv_open(enc,status);
+        if(U_FAILURE(*status)){
+            goto cleanup_bundle_write_xml;
+        }
+    }
+    write_utf8_file(out, UnicodeString(bundleStart));
+    write_tabs(out);
+    write_utf8_file(out, UnicodeString(fileStart));
+    /* check if lang and language are the same */
+    if(language != nullptr && uprv_strcmp(lang, srBundle->fLocale)!=0){
+        fprintf(stderr,"Warning: The top level tag in the resource and language specified are not the same. Please check the input.\n");
+    }
+    write_utf8_file(out, UnicodeString(lang));
+    write_utf8_file(out, UnicodeString(file1));
+    write_utf8_file(out, UnicodeString(file2));
+    write_utf8_file(out, UnicodeString(originalFileName));
+    write_utf8_file(out, UnicodeString(file4));
+
+    time(&currTime);
+    strftime(timeBuf, sizeof(timeBuf), "%Y-%m-%dT%H:%M:%SZ", gmtime(&currTime));
+    write_utf8_file(out, UnicodeString(timeBuf));
+    write_utf8_file(out, UnicodeString("\">\n"));
+
+    tabCount += 1;
+    write_tabs(out);
+    write_utf8_file(out, UnicodeString(headerStart));
+
+    tabCount += 1;
+    write_tabs(out);
+
+    write_utf8_file(out, UnicodeString(tool_start));
+    printAttribute("tool-id", tool_id, (int32_t) uprv_strlen(tool_id));
+    printAttribute("tool-name", tool_name, (int32_t) uprv_strlen(tool_name));
+    write_utf8_file(out, UnicodeString("/>\n"));
+
+    tabCount -= 1;
+    write_tabs(out);
+
+    write_utf8_file(out, UnicodeString(headerEnd));
+
+    write_tabs(out);
+    tabCount += 1;
+
+    write_utf8_file(out, UnicodeString(bodyStart));
+
+
+    res_write_xml(bundle->fRoot, bundle->fLocale, lang, true, status);
+
+    tabCount -= 1;
+    write_tabs(out);
+
+    write_utf8_file(out, UnicodeString(bodyEnd));
+    tabCount--;
+    write_tabs(out);
+    write_utf8_file(out, UnicodeString(fileEnd));
+    tabCount--;
+    write_tabs(out);
+    write_utf8_file(out, UnicodeString(bundleEnd));
+    T_FileStream_close(out);
+
+    ucnv_close(conv);
+
+cleanup_bundle_write_xml:
+    uprv_free(originalFileName);
+    uprv_free(lang);
+    if(xmlfileName != nullptr) {
+        uprv_free(xmlfileName);
+    }
+    if(outputFileName != nullptr){
+        uprv_free(outputFileName);
+    }
+}