1 files changed, 383 insertions, 0 deletions
diff --git a/intl/icu/source/io/ufile.cpp b/intl/icu/source/io/ufile.cpp
new file mode 100644
index 0000000000..9e87e4058e
--- /dev/null
+++ b/intl/icu/source/io/ufile.cpp
@@ -0,0 +1,383 @@
+// © 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 ufile.cpp
+*
+* Modification History:
+*
+*   Date        Name        Description
+*   11/19/98    stephen     Creation.
+*   03/12/99    stephen     Modified for new C API.
+*   06/16/99    stephen     Changed T_LocaleBundle to u_locbund
+*   07/19/99    stephen     Fixed to use ucnv's default codepage.
+******************************************************************************
+*/
+
+#include "unicode/platform.h"
+#if U_PLATFORM == U_PF_CYGWIN && defined(__STRICT_ANSI__)
+/* GCC on cygwin (not msys2) with -std=c++11 or newer has stopped defining fileno,
+   unless gcc extensions are enabled (-std=gnu11).
+   fileno is POSIX, but is not standard ANSI C.
+   It has always been a GCC extension, which everyone used until recently.
+   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=40278#c7
+
+   For cygwin/mingw, the FILE* pointer isn't opaque, so we can just use a simple macro.
+   Suggested fix from: https://github.com/gabime/spdlog/issues/1581#issuecomment-650323251
+*/
+#define _fileno(__F) ((__F)->_file)
+#define fileno(__F) _fileno(__F)
+#endif
+
+#include "locmap.h"
+#include "unicode/ustdio.h"
+
+#if !UCONFIG_NO_CONVERSION
+
+#include <stdlib.h>
+
+#include "ufile.h"
+#include "unicode/uloc.h"
+#include "unicode/ures.h"
+#include "unicode/ucnv.h"
+#include "unicode/ustring.h"
+#include "unicode/unistr.h"
+#include "cstring.h"
+#include "cmemory.h"
+
+#if U_PLATFORM_USES_ONLY_WIN32_API && !defined(fileno)
+/* We will just create an alias to Microsoft's implementation,
+   which is prefixed with _ as they deprecated non-ansi-standard POSIX function names.
+   https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/posix-fileno?view=msvc-170
+*/
+#define fileno _fileno
+#endif
+
+static UFILE*
+finit_owner(FILE         *f,
+              const char *locale,
+              const char *codepage,
+              UBool       takeOwnership
+              )
+{
+    UErrorCode status = U_ZERO_ERROR;
+    UFILE     *result;
+    if(f == nullptr) {
+        return 0;
+    }
+    result = (UFILE*) uprv_malloc(sizeof(UFILE));
+    if(result == nullptr) {
+        return 0;
+    }
+
+    uprv_memset(result, 0, sizeof(UFILE));
+    result->fFileno = fileno(f);
+    result->fFile = f;
+
+    result->str.fBuffer = result->fUCBuffer;
+    result->str.fPos    = result->fUCBuffer;
+    result->str.fLimit  = result->fUCBuffer;
+
+#if !UCONFIG_NO_FORMATTING
+        /* if locale is 0, use the default */
+        if(u_locbund_init(&result->str.fBundle, locale) == 0) {
+            /* DO NOT FCLOSE HERE! */
+            uprv_free(result);
+            return 0;
+        }
+#endif
+
+    /* If the codepage is not "" use the ucnv_open default behavior */
+    if(codepage == nullptr || *codepage != '\0') {
+        result->fConverter = ucnv_open(codepage, &status);
+    }
+    /* else result->fConverter is already memset'd to nullptr. */
+
+    if(U_SUCCESS(status)) {
+        result->fOwnFile = takeOwnership;
+    }
+    else {
+#if !UCONFIG_NO_FORMATTING
+        u_locbund_close(&result->str.fBundle);
+#endif
+        /* DO NOT fclose here!!!!!! */
+        uprv_free(result);
+        result = nullptr;
+    }
+
+    return result;
+}
+
+U_CAPI UFILE* U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
+u_finit(FILE          *f,
+        const char    *locale,
+        const char    *codepage)
+{
+    return finit_owner(f, locale, codepage, false);
+}
+
+U_CAPI UFILE* U_EXPORT2
+u_fadopt(FILE         *f,
+        const char    *locale,
+        const char    *codepage)
+{
+    return finit_owner(f, locale, codepage, true);
+}
+
+U_CAPI UFILE* U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
+u_fopen(const char    *filename,
+        const char    *perm,
+        const char    *locale,
+        const char    *codepage)
+{
+    UFILE     *result;
+    FILE     *systemFile = fopen(filename, perm);
+    if(systemFile == 0) {
+        return 0;
+    }
+
+    result = finit_owner(systemFile, locale, codepage, true);
+
+    if (!result) {
+        /* Something bad happened.
+           Maybe the converter couldn't be opened. */
+        fclose(systemFile);
+    }
+
+    return result; /* not a file leak */
+}
+
+// FILENAME_BUF_MAX represents the largest size that we are willing to use for a
+// stack-allocated buffer to contain a file name or path. If PATH_MAX (POSIX) or MAX_PATH
+// (Windows) are defined and are smaller than this we will use their defined value;
+// otherwise, we will use FILENAME_BUF_MAX for the stack-allocated buffer, and dynamically
+// allocate a buffer for any file name or path that is that length or longer.
+#define FILENAME_BUF_MAX 296
+#if defined PATH_MAX && PATH_MAX < FILENAME_BUF_MAX
+#define FILENAME_BUF_CAPACITY PATH_MAX
+#elif defined MAX_PATH && MAX_PATH < FILENAME_BUF_MAX
+#define FILENAME_BUF_CAPACITY MAX_PATH
+#else
+#define FILENAME_BUF_CAPACITY FILENAME_BUF_MAX
+#endif
+
+U_CAPI UFILE* U_EXPORT2
+u_fopen_u(const char16_t   *filename,
+        const char    *perm,
+        const char    *locale,
+        const char    *codepage)
+{
+    UFILE *result;
+    char buffer[FILENAME_BUF_CAPACITY];
+    char *filenameBuffer = buffer;
+
+    icu::UnicodeString filenameString(true, filename, -1); // readonly aliasing, does not allocate memory
+    // extract with conversion to platform default codepage, return full length (not including 0 termination)
+    int32_t filenameLength = filenameString.extract(0, filenameString.length(), filenameBuffer, FILENAME_BUF_CAPACITY);
+    if (filenameLength >= FILENAME_BUF_CAPACITY) { // could not fit (with zero termination) in buffer
+        filenameBuffer = static_cast<char *>(uprv_malloc(++filenameLength)); // add one for zero termination
+        if (!filenameBuffer) {
+            return nullptr;
+        }
+        filenameString.extract(0, filenameString.length(), filenameBuffer, filenameLength);
+    }
+
+    result = u_fopen(filenameBuffer, perm, locale, codepage);
+#if U_PLATFORM_USES_ONLY_WIN32_API
+    /* Try Windows API _wfopen if the above fails. */
+    if (!result) {
+        // TODO: test this code path, including wperm.
+        wchar_t wperm[40] = {};
+        size_t  retVal;
+        mbstowcs_s(&retVal, wperm, UPRV_LENGTHOF(wperm), perm, _TRUNCATE);
+        FILE *systemFile = _wfopen(reinterpret_cast<const wchar_t *>(filename), wperm); // may return nullptr for long filename
+        if (systemFile) {
+            result = finit_owner(systemFile, locale, codepage, true);
+        }
+        if (!result && systemFile) {
+            /* Something bad happened.
+               Maybe the converter couldn't be opened.
+               Bu do not fclose(systemFile) if systemFile is nullptr. */
+            fclose(systemFile);
+        }
+    }
+#endif
+    if (filenameBuffer != buffer) {
+        uprv_free(filenameBuffer);
+    }
+    return result; /* not a file leak */
+}
+
+
+U_CAPI UFILE* U_EXPORT2
+u_fstropen(char16_t *stringBuf,
+           int32_t      capacity,
+           const char  *locale)
+{
+    UFILE *result;
+
+    if (capacity < 0) {
+        return nullptr;
+    }
+
+    result = (UFILE*) uprv_malloc(sizeof(UFILE));
+    /* Null pointer test */
+    if (result == nullptr) {
+        return nullptr; /* Just get out. */
+    }
+    uprv_memset(result, 0, sizeof(UFILE));
+    result->str.fBuffer = stringBuf;
+    result->str.fPos    = stringBuf;
+    result->str.fLimit  = stringBuf+capacity;
+
+#if !UCONFIG_NO_FORMATTING
+    /* if locale is 0, use the default */
+    if(u_locbund_init(&result->str.fBundle, locale) == 0) {
+        /* DO NOT FCLOSE HERE! */
+        uprv_free(result);
+        return 0;
+    }
+#endif
+
+    return result;
+}
+
+U_CAPI UBool U_EXPORT2
+u_feof(UFILE  *f)
+{
+    UBool endOfBuffer;
+    if (f == nullptr) {
+        return true;
+    }
+    endOfBuffer = (UBool)(f->str.fPos >= f->str.fLimit);
+    if (f->fFile != nullptr) {
+        return endOfBuffer && feof(f->fFile);
+    }
+    return endOfBuffer;
+}
+
+U_CAPI void U_EXPORT2
+u_fflush(UFILE *file)
+{
+    ufile_flush_translit(file);
+    ufile_flush_io(file);
+    if (file->fFile) {
+        fflush(file->fFile);
+    }
+    else if (file->str.fPos < file->str.fLimit) {
+        *(file->str.fPos++) = 0;
+    }
+    /* TODO: flush input */
+}
+
+U_CAPI void
+u_frewind(UFILE *file)
+{
+    u_fflush(file);
+    ucnv_reset(file->fConverter);
+    if (file->fFile) {
+        rewind(file->fFile);
+        file->str.fLimit = file->fUCBuffer;
+        file->str.fPos   = file->fUCBuffer;
+    }
+    else {
+        file->str.fPos = file->str.fBuffer;
+    }
+}
+
+U_CAPI void U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
+u_fclose(UFILE *file)
+{
+    if (file) {
+        u_fflush(file);
+        ufile_close_translit(file);
+
+        if(file->fOwnFile)
+            fclose(file->fFile);
+
+#if !UCONFIG_NO_FORMATTING
+        u_locbund_close(&file->str.fBundle);
+#endif
+
+        ucnv_close(file->fConverter);
+        uprv_free(file);
+    }
+}
+
+U_CAPI FILE* U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
+u_fgetfile(    UFILE         *f)
+{
+    return f->fFile;
+}
+
+#if !UCONFIG_NO_FORMATTING
+
+U_CAPI const char*  U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
+u_fgetlocale(    UFILE        *file)
+{
+    return file->str.fBundle.fLocale;
+}
+
+U_CAPI int32_t U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
+u_fsetlocale(UFILE      *file,
+             const char *locale)
+{
+    u_locbund_close(&file->str.fBundle);
+
+    return u_locbund_init(&file->str.fBundle, locale) == 0 ? -1 : 0;
+}
+
+#endif
+
+U_CAPI const char* U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
+u_fgetcodepage(UFILE        *file)
+{
+    UErrorCode     status = U_ZERO_ERROR;
+    const char     *codepage = nullptr;
+
+    if (file->fConverter) {
+        codepage = ucnv_getName(file->fConverter, &status);
+        if(U_FAILURE(status))
+            return 0;
+    }
+    return codepage;
+}
+
+U_CAPI int32_t U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
+u_fsetcodepage(    const char    *codepage,
+               UFILE        *file)
+{
+    UErrorCode status = U_ZERO_ERROR;
+    int32_t retVal = -1;
+
+    /* We use the normal default codepage for this system, and not the one for the locale. */
+    if ((file->str.fPos == file->str.fBuffer) && (file->str.fLimit == file->str.fBuffer)) {
+        ucnv_close(file->fConverter);
+        file->fConverter = ucnv_open(codepage, &status);
+        if(U_SUCCESS(status)) {
+            retVal = 0;
+        }
+    }
+    return retVal;
+}
+
+
+U_CAPI UConverter * U_EXPORT2 /* U_CAPI ... U_EXPORT2 added by Peter Kirk 17 Nov 2001 */
+u_fgetConverter(UFILE *file)
+{
+    return file->fConverter;
+}
+#if !UCONFIG_NO_FORMATTING
+U_CAPI const UNumberFormat* U_EXPORT2 u_fgetNumberFormat(UFILE *file)
+{
+    return u_locbund_getNumberFormat(&file->str.fBundle, UNUM_DECIMAL);
+}
+#endif
+
+#endif