icuSources/common/ubrk.cpp

   1 /*
   2 ********************************************************************************
   3 *   Copyright (C) 1996-2008, International Business Machines
   4 *   Corporation and others.  All Rights Reserved.
   5 ********************************************************************************
   6 */
   7
   8 #include "unicode/utypes.h"
   9
  10 #if !UCONFIG_NO_BREAK_ITERATION
  11
  12 #include "unicode/ubrk.h"
  13
  14 #include "unicode/brkiter.h"
  15 #include "unicode/uloc.h"
  16 #include "unicode/ustring.h"
  17 #include "unicode/uchriter.h"
  18 #include "unicode/rbbi.h"
  19 #include "rbbirb.h"
  20 #include "uassert.h"
  21
  22 U_NAMESPACE_USE
  23
  24 //------------------------------------------------------------------------------
  25 //
  26 //    ubrk_open      Create a canned type of break iterator based on type (word, line, etc.)
  27 //                   and locale.
  28 //
  29 //------------------------------------------------------------------------------
  30 U_CAPI UBreakIterator* U_EXPORT2
  31 ubrk_open(UBreakIteratorType type,
  32       const char *locale,
  33       const UChar *text,
  34       int32_t textLength,
  35       UErrorCode *status)
  36 {
  37
  38   if(U_FAILURE(*status)) return 0;
  39
  40   BreakIterator *result = 0;
  41
  42   switch(type) {
  43
  44   case UBRK_CHARACTER:
  45     result = BreakIterator::createCharacterInstance(Locale(locale), *status);
  46     break;
  47
  48   case UBRK_WORD:
  49     result = BreakIterator::createWordInstance(Locale(locale), *status);
  50     break;
  51
  52   case UBRK_LINE:
  53     result = BreakIterator::createLineInstance(Locale(locale), *status);
  54     break;
  55
  56   case UBRK_SENTENCE:
  57     result = BreakIterator::createSentenceInstance(Locale(locale), *status);
  58     break;
  59
  60   case UBRK_TITLE:
  61     result = BreakIterator::createTitleInstance(Locale(locale), *status);
  62     break;
  63
  64   default:
  65     *status = U_ILLEGAL_ARGUMENT_ERROR;
  66   }
  67
  68   // check for allocation error
  69   if (U_FAILURE(*status)) {
  70      return 0;
  71   }
  72   if(result == 0) {
  73     *status = U_MEMORY_ALLOCATION_ERROR;
  74     return 0;
  75   }
  76
  77
  78   UBreakIterator *uBI = (UBreakIterator *)result;
  79   if (text != NULL) {
  80       ubrk_setText(uBI, text, textLength, status);
  81   }
  82   return uBI;
  83 }
  84
  85
  86
  87 //------------------------------------------------------------------------------
  88 //
  89 //   ubrk_openRules      open a break iterator from a set of break rules.
  90 //                       Invokes the rule builder.
  91 //
  92 //------------------------------------------------------------------------------
  93 U_CAPI UBreakIterator* U_EXPORT2
  94 ubrk_openRules(  const UChar        *rules,
  95                        int32_t       rulesLength,
  96                  const UChar        *text,
  97                        int32_t       textLength,
  98                        UParseError  *parseErr,
  99                        UErrorCode   *status)  {
 100
 101     if (status == NULL || U_FAILURE(*status)){
 102         return 0;
 103     }
 104
 105     BreakIterator *result = 0;
 106     UnicodeString ruleString(rules, rulesLength);
 107     result = RBBIRuleBuilder::createRuleBasedBreakIterator(ruleString, parseErr, *status);
 108     if(U_FAILURE(*status)) {
 109         return 0;
 110     }
 111
 112     UBreakIterator *uBI = (UBreakIterator *)result;
 113     if (text != NULL) {
 114         ubrk_setText(uBI, text, textLength, status);
 115     }
 116     return uBI;
 117 }
 118
 119
 120
 121
 122
 123 U_CAPI UBreakIterator * U_EXPORT2
 124 ubrk_safeClone(
 125           const UBreakIterator *bi,
 126           void *stackBuffer,
 127           int32_t *pBufferSize,
 128           UErrorCode *status)
 129 {
 130     if (status == NULL || U_FAILURE(*status)){
 131         return 0;
 132     }
 133     if (!pBufferSize || !bi){
 134        *status = U_ILLEGAL_ARGUMENT_ERROR;
 135         return 0;
 136     }
 137     // Clear any incoming Safe Clone Allocated warning.
 138     //  Propagating this through to our return would really
 139     //  confuse our caller.
 140     if (*status==U_SAFECLONE_ALLOCATED_WARNING) {
 141         *status = U_ZERO_ERROR;
 142     }
 143     return (UBreakIterator *)(((BreakIterator*)bi)->
 144         createBufferClone(stackBuffer, *pBufferSize, *status));
 145 }
 146
 147
 148
 149 U_CAPI void U_EXPORT2
 150 ubrk_close(UBreakIterator *bi)
 151 {
 152     BreakIterator *ubi = (BreakIterator*) bi;
 153     if (ubi) {
 154         if (ubi->isBufferClone()) {
 155             ubi->~BreakIterator();
 156             *(uint32_t *)ubi = 0xdeadbeef;
 157         } else {
 158             delete ubi;
 159         }
 160     }
 161 }
 162
 163 U_CAPI void U_EXPORT2
 164 ubrk_setText(UBreakIterator* bi,
 165              const UChar*    text,
 166              int32_t         textLength,
 167              UErrorCode*     status)
 168 {
 169     BreakIterator *brit = (BreakIterator *)bi;
 170     UText  ut = UTEXT_INITIALIZER;
 171     utext_openUChars(&ut, text, textLength, status);
 172     brit->setText(&ut, *status);
 173     // A stack allocated UText wrapping a UCHar * string
 174     //   can be dumped without explicitly closing it.
 175 }
 176
 177
 178
 179 U_CAPI void U_EXPORT2
 180 ubrk_setUText(UBreakIterator *bi,
 181              UText          *text,
 182              UErrorCode     *status)
 183 {
 184     RuleBasedBreakIterator *brit = (RuleBasedBreakIterator *)bi;
 185     brit->RuleBasedBreakIterator::setText(text, *status);
 186 }
 187
 188
 189
 190
 191
 192 U_CAPI int32_t U_EXPORT2
 193 ubrk_current(const UBreakIterator *bi)
 194 {
 195
 196   return ((RuleBasedBreakIterator*)bi)->RuleBasedBreakIterator::current();
 197 }
 198
 199 U_CAPI int32_t U_EXPORT2
 200 ubrk_next(UBreakIterator *bi)
 201 {
 202
 203   return ((RuleBasedBreakIterator*)bi)->RuleBasedBreakIterator::next();
 204 }
 205
 206 U_CAPI int32_t U_EXPORT2
 207 ubrk_previous(UBreakIterator *bi)
 208 {
 209
 210   return ((RuleBasedBreakIterator*)bi)->RuleBasedBreakIterator::previous();
 211 }
 212
 213 U_CAPI int32_t U_EXPORT2
 214 ubrk_first(UBreakIterator *bi)
 215 {
 216
 217   return ((RuleBasedBreakIterator*)bi)->RuleBasedBreakIterator::first();
 218 }
 219
 220 U_CAPI int32_t U_EXPORT2
 221 ubrk_last(UBreakIterator *bi)
 222 {
 223
 224   return ((RuleBasedBreakIterator*)bi)->RuleBasedBreakIterator::last();
 225 }
 226
 227 U_CAPI int32_t U_EXPORT2
 228 ubrk_preceding(UBreakIterator *bi,
 229            int32_t offset)
 230 {
 231
 232   return ((RuleBasedBreakIterator*)bi)->RuleBasedBreakIterator::preceding(offset);
 233 }
 234
 235 U_CAPI int32_t U_EXPORT2
 236 ubrk_following(UBreakIterator *bi,
 237            int32_t offset)
 238 {
 239
 240   return ((RuleBasedBreakIterator*)bi)->RuleBasedBreakIterator::following(offset);
 241 }
 242
 243 U_CAPI const char* U_EXPORT2
 244 ubrk_getAvailable(int32_t index)
 245 {
 246
 247   return uloc_getAvailable(index);
 248 }
 249
 250 U_CAPI int32_t U_EXPORT2
 251 ubrk_countAvailable()
 252 {
 253
 254   return uloc_countAvailable();
 255 }
 256
 257
 258 U_CAPI  UBool U_EXPORT2
 259 ubrk_isBoundary(UBreakIterator *bi, int32_t offset)
 260 {
 261     return ((RuleBasedBreakIterator *)bi)->RuleBasedBreakIterator::isBoundary(offset);
 262 }
 263
 264
 265 U_CAPI  int32_t U_EXPORT2
 266 ubrk_getRuleStatus(UBreakIterator *bi)
 267 {
 268     return ((RuleBasedBreakIterator *)bi)->RuleBasedBreakIterator::getRuleStatus();
 269 }
 270
 271 U_CAPI  int32_t U_EXPORT2
 272 ubrk_getRuleStatusVec(UBreakIterator *bi, int32_t *fillInVec, int32_t capacity, UErrorCode *status)
 273 {
 274     return ((RuleBasedBreakIterator *)bi)->RuleBasedBreakIterator::getRuleStatusVec(fillInVec, capacity, *status);
 275 }
 276
 277
 278 U_CAPI const char* U_EXPORT2
 279 ubrk_getLocaleByType(const UBreakIterator *bi,
 280                      ULocDataLocaleType type,
 281                      UErrorCode* status)
 282 {
 283     if (bi == NULL) {
 284         if (U_SUCCESS(*status)) {
 285             *status = U_ILLEGAL_ARGUMENT_ERROR;
 286         }
 287         return NULL;
 288     }
 289     return ((BreakIterator*)bi)->getLocaleID(type, *status);
 290 }
 291
 292
 293 #endif /* #if !UCONFIG_NO_BREAK_ITERATION */