UBreakIterator*
get_rules(const char *ruleFileName, UErrorCode status)
{
/* Read in the rule source file */
long result;
long ruleFileSize;
FILE *file;
OFILE *ufile;
UBreakIterator *return_me;
file = fopen(ruleFileName, "rb");
if( file == 0 ) {
fprintf(stderr, "Could not open file \"%s\"\n", ruleFileName);
exit(-1);
}
fseek(file, 0, SEEK_END);
ruleFileSize = ftell(file);
fseek(file, 0, SEEK_SET);
char *ruleBufferC = (char *) omalloc (ruleFileSize + 1);
ruleBufferC[ruleFileSize] = '\0';
result = (long)fread(ruleBufferC, 1, ruleFileSize, file);
if (result != ruleFileSize) {
fprintf(stderr, "Error reading file \"%s\"\n", ruleFileName);
exit (-1);
}
/* Look for a Unicode Signature (BOM) on the rule file */
int32_t signatureLength;
const char * ruleSourceC = ruleBufferC;
const char* encoding = ucnv_detectUnicodeSignature(
ruleSourceC, ruleFileSize, &signatureLength, &status);
/* fprintf(stderr, "DetectUnicodeSig: \"%s\"\n", encoding); */
if (U_FAILURE(status))
{
fprintf(stderr, "\nCan not initialize ICU. status = %s\n",
u_errorName(status));
exit(1);
}
if(encoding!=NULL )
{
ruleSourceC += signatureLength;
ruleFileSize -= signatureLength;
}
/* fprintf(stderr, "encoding: \"%s\"\n", encoding); */
/* Open a converter to take the rule file to UTF-16 */
UConverter* conv;
conv = ucnv_open(encoding, &status);
if (U_FAILURE(status)) {
fprintf(stderr, "ucnv_open: ICU Error \"%s\"\n", u_errorName(status));
exit(1);
}
ufile = u_finit(file, NULL, NULL);
u_frewind(ufile);
UChar *ruleSourceU = (UChar *) omalloc ((ruleFileSize*sizeof(UChar))+1);
long charsRead = u_file_read(ruleSourceU, ruleFileSize, ufile);
/* u_fprintf(u_stderr, "Chars read: \"%i\", File size: \"%i\"\n", charsRead, ruleFileSize); */
ruleSourceU[charsRead] = 0;
/* u_fprintf(u_stderr, "RulesourceU POST: \"%S\"\n", ruleSourceU); */
ucnv_close(conv);
u_fclose(ufile);
/* Create the break iterator from the rules */
/* This will compile the rules. */
UParseError parseError;
parseError.line = 0;
parseError.offset = 0;
return_me = ubrk_openRules(ruleSourceU, ruleFileSize, NULL, 0, &parseError, &status);
if (U_FAILURE(status)) {
fprintf(stderr, "createRuleBasedBreakIterator: ICU Error \"%s\" at line %d, column %d\n",
u_errorName(status), (int)parseError.line, (int)parseError.offset);
exit(1);
};
return return_me;
}
static int icu_ufile_rewind(lua_State *L) {
u_frewind(icu4lua_checkufile(L, 1, UFILE_UV_META));
return 0;
}
