1 files changed, 168 insertions, 0 deletions
diff --git a/intl/icu/source/tools/gencolusb/extract_unsafe_backwards.cpp b/intl/icu/source/tools/gencolusb/extract_unsafe_backwards.cpp
new file mode 100644
index 0000000000..ee12e69f9b
--- /dev/null
+++ b/intl/icu/source/tools/gencolusb/extract_unsafe_backwards.cpp
@@ -0,0 +1,168 @@
+// © 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.
+ *
+ * Generator for source/i18n/collunsafe.h
+ * see Makefile
+ */
+
+#include <stdio.h>
+#include "unicode/uversion.h"
+#include "unicode/uniset.h"
+#include "collationroot.h"
+#include "collationtailoring.h"
+
+/**
+ * Define the type of generator to use. Choose one.
+ */
+#define SERIALIZE 1   //< Default: use UnicodeSet.serialize() and a new internal c'tor
+#define RANGES 0      //< Enumerate ranges (works, not as fast. No support in collationdatareader.cpp)
+#define PATTERN 0     //< Generate a UnicodeSet pattern (depends on #11891 AND probably slower. No support in collationdatareader.cpp)
+
+int main(int argc, const char *argv[]) {
+    UErrorCode errorCode = U_ZERO_ERROR;
+
+    // Get the unsafeBackwardsSet
+    const CollationCacheEntry *rootEntry = CollationRoot::getRootCacheEntry(errorCode);
+    if(U_FAILURE(errorCode)) {
+      fprintf(stderr, "Err: %s getting root cache entry\n", u_errorName(errorCode));
+      return 1;
+    }
+    const UVersionInfo &version = rootEntry->tailoring->version;
+    const UnicodeSet *unsafeBackwardSet = rootEntry->tailoring->unsafeBackwardSet;
+    char verString[20];
+    u_versionToString(version, verString);
+    fprintf(stderr, "Generating data for ICU %s, Collation %s\n", U_ICU_VERSION, verString);
+    int32_t rangeCount = unsafeBackwardSet->getRangeCount();
+    
+#if SERIALIZE
+    fprintf(stderr, ".. serializing\n");
+    // UnicodeSet serialization
+    
+    UErrorCode preflightCode = U_ZERO_ERROR;
+    // preflight
+    int32_t serializedCount = unsafeBackwardSet->serialize(nullptr,0,preflightCode);
+    if(U_FAILURE(preflightCode) && preflightCode != U_BUFFER_OVERFLOW_ERROR) {
+      fprintf(stderr, "Err: %s preflighting unicode set\n", u_errorName(preflightCode));
+      return 1;
+    }
+    uint16_t *serializedData = new uint16_t[serializedCount];
+    // serialize
+    unsafeBackwardSet->serialize(serializedData, serializedCount, errorCode);
+    if(U_FAILURE(errorCode)) {
+      delete [] serializedData;
+      fprintf(stderr, "Err: %s serializing unicodeset\n", u_errorName(errorCode));
+      return 1;
+    }
+#endif
+    
+#if PATTERN
+    fprintf(stderr,".. pattern. (Note: collationdatareader.cpp does not support this form also see #11891)\n");
+    // attempt to use pattern
+    
+    UnicodeString pattern;
+    UnicodeSet set(*unsafeBackwardSet);
+    set.compact();
+    set.toPattern(pattern, false);
+
+    if(U_SUCCESS(errorCode)) {
+      // This fails (bug# ?) - which is why this method was abandoned.
+      
+      // UnicodeSet usA(pattern, errorCode);
+      // fprintf(stderr, "\n%s:%d: err creating set A %s\n", __FILE__, __LINE__, u_errorName(errorCode));
+      // return 1;
+    }
+
+
+    const char16_t *buf = pattern.getBuffer();
+    int32_t needed = pattern.length();
+
+    // print
+    {
+      char buf2[2048];
+      int32_t len2 = pattern.extract(0, pattern.length(), buf2, "utf-8");
+      buf2[len2]=0;
+      fprintf(stderr,"===\n%s\n===\n", buf2);
+    }
+
+    const UnicodeString unsafeBackwardPattern(false, buf, needed);
+  if(U_SUCCESS(errorCode)) {
+    //UnicodeSet us(unsafeBackwardPattern, errorCode);
+    //    fprintf(stderr, "\n%s:%d: err creating set %s\n", __FILE__, __LINE__, u_errorName(errorCode));
+  } else {
+    fprintf(stderr, "Uset OK - \n");
+  }
+#endif
+
+
+  // Generate the output file.
+
+  printf("// collunsafe.h\n");
+  printf("// %s\n", U_COPYRIGHT_STRING);
+  printf("\n");
+  printf("// To be included by collationdatareader.cpp, and generated by gencolusb.\n");
+  printf("// Machine generated, do not edit.\n");
+  printf("\n");
+  printf("#ifndef COLLUNSAFE_H\n"
+         "#define COLLUNSAFE_H\n"
+         "\n"
+         "#include \"unicode/utypes.h\"\n"
+         "\n"
+         "#define COLLUNSAFE_ICU_VERSION \"" U_ICU_VERSION "\"\n");
+  printf("#define COLLUNSAFE_COLL_VERSION \"%s\"\n", verString);
+
+  
+  
+#if PATTERN
+  printf("#define COLLUNSAFE_PATTERN 1\n");
+  printf("static const int32_t collunsafe_len = %d;\n", needed);
+  printf("static const char16_t collunsafe_pattern[collunsafe_len] = {\n");
+  for(int i=0;i<needed;i++) {
+    if( (i>0) && (i%8 == 0) ) {
+      printf(" // %d\n", i);
+    }
+    printf("0x%04X", buf[i]); // TODO check
+    if(i != (needed-1)) {
+      printf(", ");
+    }
+    }
+  printf(" //%d\n};\n", (needed-1));
+#endif
+
+#if RANGE
+    fprintf(stderr, "COLLUNSAFE_RANGE - no code support in collationdatareader.cpp for this\n");
+    printf("#define COLLUNSAFE_RANGE 1\n");
+    printf("static const int32_t unsafe_rangeCount = %d;\n", rangeCount);
+    printf("static const UChar32 unsafe_ranges[%d] = { \n", rangeCount*2);
+    for(int32_t i=0;i<rangeCount;i++) {
+      printf(" 0x%04X, 0x%04X, // %d\n",
+             unsafeBackwardSet->getRangeStart(i),
+             unsafeBackwardSet->getRangeEnd(i),
+             i);
+    }
+    printf("};\n");
+#endif
+
+#if SERIALIZE
+    printf("#define COLLUNSAFE_SERIALIZE 1\n");    
+    printf("static const int32_t unsafe_serializedCount = %d;\n", serializedCount);
+    printf("static const uint16_t unsafe_serializedData[%d] = { \n", serializedCount);
+    for(int32_t i=0;i<serializedCount;i++) {
+      if( (i>0) && (i%8 == 0) ) {
+        printf(" // %d\n", i);
+      }
+      printf("0x%04X", serializedData[i]); // TODO check
+      if(i != (serializedCount-1)) {
+        printf(", ");
+      }
+    }  
+    printf("};\n");
+#endif
+    
+    printf("#endif\n");
+    fflush(stderr);
+    fflush(stdout);
+    return(U_SUCCESS(errorCode)?0:1);
+}