1/* 2********************************************************************** 3* Copyright (c) 2002-2014, International Business Machines 4* Corporation and others. All Rights Reserved. 5********************************************************************** 6* Author: Alan Liu 7* Created: November 11 2002 8* Since: ICU 2.4 9********************************************************************** 10*/ 11#include "utypeinfo.h" // for 'typeid' to work 12 13#include "unicode/ustring.h" 14#include "unicode/strenum.h" 15#include "unicode/putil.h" 16#include "uenumimp.h" 17#include "ustrenum.h" 18#include "cstring.h" 19#include "cmemory.h" 20#include "uassert.h" 21 22U_NAMESPACE_BEGIN 23// StringEnumeration implementation ---------------------------------------- *** 24 25StringEnumeration::StringEnumeration() 26 : chars(charsBuffer), charsCapacity(sizeof(charsBuffer)) { 27} 28 29StringEnumeration::~StringEnumeration() { 30 if (chars != NULL && chars != charsBuffer) { 31 uprv_free(chars); 32 } 33} 34 35// StringEnumeration base class clone() default implementation, does not clone 36StringEnumeration * 37StringEnumeration::clone() const { 38 return NULL; 39} 40 41const char * 42StringEnumeration::next(int32_t *resultLength, UErrorCode &status) { 43 const UnicodeString *s=snext(status); 44 if(U_SUCCESS(status) && s!=NULL) { 45 unistr=*s; 46 ensureCharsCapacity(unistr.length()+1, status); 47 if(U_SUCCESS(status)) { 48 if(resultLength!=NULL) { 49 *resultLength=unistr.length(); 50 } 51 unistr.extract(0, INT32_MAX, chars, charsCapacity, US_INV); 52 return chars; 53 } 54 } 55 56 return NULL; 57} 58 59const UChar * 60StringEnumeration::unext(int32_t *resultLength, UErrorCode &status) { 61 const UnicodeString *s=snext(status); 62 if(U_SUCCESS(status) && s!=NULL) { 63 unistr=*s; 64 if(resultLength!=NULL) { 65 *resultLength=unistr.length(); 66 } 67 return unistr.getTerminatedBuffer(); 68 } 69 70 return NULL; 71} 72 73const UnicodeString * 74StringEnumeration::snext(UErrorCode &status) { 75 int32_t length; 76 const char *s=next(&length, status); 77 return setChars(s, length, status); 78} 79 80void 81StringEnumeration::ensureCharsCapacity(int32_t capacity, UErrorCode &status) { 82 if(U_SUCCESS(status) && capacity>charsCapacity) { 83 if(capacity<(charsCapacity+charsCapacity/2)) { 84 // avoid allocation thrashing 85 capacity=charsCapacity+charsCapacity/2; 86 } 87 if(chars!=charsBuffer) { 88 uprv_free(chars); 89 } 90 chars=(char *)uprv_malloc(capacity); 91 if(chars==NULL) { 92 chars=charsBuffer; 93 charsCapacity=sizeof(charsBuffer); 94 status=U_MEMORY_ALLOCATION_ERROR; 95 } else { 96 charsCapacity=capacity; 97 } 98 } 99} 100 101UnicodeString * 102StringEnumeration::setChars(const char *s, int32_t length, UErrorCode &status) { 103 if(U_SUCCESS(status) && s!=NULL) { 104 if(length<0) { 105 length=(int32_t)uprv_strlen(s); 106 } 107 108 UChar *buffer=unistr.getBuffer(length+1); 109 if(buffer!=NULL) { 110 u_charsToUChars(s, buffer, length); 111 buffer[length]=0; 112 unistr.releaseBuffer(length); 113 return &unistr; 114 } else { 115 status=U_MEMORY_ALLOCATION_ERROR; 116 } 117 } 118 119 return NULL; 120} 121UBool 122StringEnumeration::operator==(const StringEnumeration& that)const { 123 return typeid(*this) == typeid(that); 124} 125 126UBool 127StringEnumeration::operator!=(const StringEnumeration& that)const { 128 return !operator==(that); 129} 130 131// UStringEnumeration implementation --------------------------------------- *** 132 133UStringEnumeration * U_EXPORT2 134UStringEnumeration::fromUEnumeration( 135 UEnumeration *uenumToAdopt, UErrorCode &status) { 136 if (U_FAILURE(status)) { 137 uenum_close(uenumToAdopt); 138 return NULL; 139 } 140 UStringEnumeration *result = new UStringEnumeration(uenumToAdopt); 141 if (result == NULL) { 142 status = U_MEMORY_ALLOCATION_ERROR; 143 uenum_close(uenumToAdopt); 144 return NULL; 145 } 146 return result; 147} 148 149UStringEnumeration::UStringEnumeration(UEnumeration* _uenum) : 150 uenum(_uenum) { 151 U_ASSERT(_uenum != 0); 152} 153 154UStringEnumeration::~UStringEnumeration() { 155 uenum_close(uenum); 156} 157 158int32_t UStringEnumeration::count(UErrorCode& status) const { 159 return uenum_count(uenum, &status); 160} 161 162const char *UStringEnumeration::next(int32_t *resultLength, UErrorCode &status) { 163 return uenum_next(uenum, resultLength, &status); 164} 165 166const UnicodeString* UStringEnumeration::snext(UErrorCode& status) { 167 int32_t length; 168 const UChar* str = uenum_unext(uenum, &length, &status); 169 if (str == 0 || U_FAILURE(status)) { 170 return 0; 171 } 172 return &unistr.setTo(str, length); 173} 174 175void UStringEnumeration::reset(UErrorCode& status) { 176 uenum_reset(uenum, &status); 177} 178 179UOBJECT_DEFINE_RTTI_IMPLEMENTATION(UStringEnumeration) 180U_NAMESPACE_END 181 182// C wrapper --------------------------------------------------------------- *** 183 184#define THIS(en) ((icu::StringEnumeration*)(en->context)) 185 186U_CDECL_BEGIN 187 188/** 189 * Wrapper API to make StringEnumeration look like UEnumeration. 190 */ 191static void U_CALLCONV 192ustrenum_close(UEnumeration* en) { 193 delete THIS(en); 194 uprv_free(en); 195} 196 197/** 198 * Wrapper API to make StringEnumeration look like UEnumeration. 199 */ 200static int32_t U_CALLCONV 201ustrenum_count(UEnumeration* en, 202 UErrorCode* ec) 203{ 204 return THIS(en)->count(*ec); 205} 206 207/** 208 * Wrapper API to make StringEnumeration look like UEnumeration. 209 */ 210static const UChar* U_CALLCONV 211ustrenum_unext(UEnumeration* en, 212 int32_t* resultLength, 213 UErrorCode* ec) 214{ 215 return THIS(en)->unext(resultLength, *ec); 216} 217 218/** 219 * Wrapper API to make StringEnumeration look like UEnumeration. 220 */ 221static const char* U_CALLCONV 222ustrenum_next(UEnumeration* en, 223 int32_t* resultLength, 224 UErrorCode* ec) 225{ 226 return THIS(en)->next(resultLength, *ec); 227} 228 229/** 230 * Wrapper API to make StringEnumeration look like UEnumeration. 231 */ 232static void U_CALLCONV 233ustrenum_reset(UEnumeration* en, 234 UErrorCode* ec) 235{ 236 THIS(en)->reset(*ec); 237} 238 239/** 240 * Pseudo-vtable for UEnumeration wrapper around StringEnumeration. 241 * The StringEnumeration pointer will be stored in 'context'. 242 */ 243static const UEnumeration USTRENUM_VT = { 244 NULL, 245 NULL, // store StringEnumeration pointer here 246 ustrenum_close, 247 ustrenum_count, 248 ustrenum_unext, 249 ustrenum_next, 250 ustrenum_reset 251}; 252 253U_CDECL_END 254 255/** 256 * Given a StringEnumeration, wrap it in a UEnumeration. The 257 * StringEnumeration is adopted; after this call, the caller must not 258 * delete it (regardless of error status). 259 */ 260U_CAPI UEnumeration* U_EXPORT2 261uenum_openFromStringEnumeration(icu::StringEnumeration* adopted, UErrorCode* ec) { 262 UEnumeration* result = NULL; 263 if (U_SUCCESS(*ec) && adopted != NULL) { 264 result = (UEnumeration*) uprv_malloc(sizeof(UEnumeration)); 265 if (result == NULL) { 266 *ec = U_MEMORY_ALLOCATION_ERROR; 267 } else { 268 uprv_memcpy(result, &USTRENUM_VT, sizeof(USTRENUM_VT)); 269 result->context = adopted; 270 } 271 } 272 if (result == NULL) { 273 delete adopted; 274 } 275 return result; 276} 277 278// C wrapper --------------------------------------------------------------- *** 279 280U_CDECL_BEGIN 281 282typedef struct UCharStringEnumeration { 283 UEnumeration uenum; 284 int32_t index, count; 285} UCharStringEnumeration; 286 287static void U_CALLCONV 288ucharstrenum_close(UEnumeration* en) { 289 uprv_free(en); 290} 291 292static int32_t U_CALLCONV 293ucharstrenum_count(UEnumeration* en, 294 UErrorCode* /*ec*/) { 295 return ((UCharStringEnumeration*)en)->count; 296} 297 298static const UChar* U_CALLCONV 299ucharstrenum_unext(UEnumeration* en, 300 int32_t* resultLength, 301 UErrorCode* /*ec*/) { 302 UCharStringEnumeration *e = (UCharStringEnumeration*) en; 303 if (e->index >= e->count) { 304 return NULL; 305 } 306 const UChar* result = ((const UChar**)e->uenum.context)[e->index++]; 307 if (resultLength) { 308 *resultLength = (int32_t)u_strlen(result); 309 } 310 return result; 311} 312 313 314static const char* U_CALLCONV 315ucharstrenum_next(UEnumeration* en, 316 int32_t* resultLength, 317 UErrorCode* /*ec*/) { 318 UCharStringEnumeration *e = (UCharStringEnumeration*) en; 319 if (e->index >= e->count) { 320 return NULL; 321 } 322 const char* result = ((const char**)e->uenum.context)[e->index++]; 323 if (resultLength) { 324 *resultLength = (int32_t)uprv_strlen(result); 325 } 326 return result; 327} 328 329static void U_CALLCONV 330ucharstrenum_reset(UEnumeration* en, 331 UErrorCode* /*ec*/) { 332 ((UCharStringEnumeration*)en)->index = 0; 333} 334 335static const UEnumeration UCHARSTRENUM_VT = { 336 NULL, 337 NULL, // store StringEnumeration pointer here 338 ucharstrenum_close, 339 ucharstrenum_count, 340 uenum_unextDefault, 341 ucharstrenum_next, 342 ucharstrenum_reset 343}; 344 345static const UEnumeration UCHARSTRENUM_U_VT = { 346 NULL, 347 NULL, // store StringEnumeration pointer here 348 ucharstrenum_close, 349 ucharstrenum_count, 350 ucharstrenum_unext, 351 uenum_nextDefault, 352 ucharstrenum_reset 353}; 354 355U_CDECL_END 356 357U_CAPI UEnumeration* U_EXPORT2 358uenum_openCharStringsEnumeration(const char* const strings[], int32_t count, 359 UErrorCode* ec) { 360 UCharStringEnumeration* result = NULL; 361 if (U_SUCCESS(*ec) && count >= 0 && (count == 0 || strings != 0)) { 362 result = (UCharStringEnumeration*) uprv_malloc(sizeof(UCharStringEnumeration)); 363 if (result == NULL) { 364 *ec = U_MEMORY_ALLOCATION_ERROR; 365 } else { 366 U_ASSERT((char*)result==(char*)(&result->uenum)); 367 uprv_memcpy(result, &UCHARSTRENUM_VT, sizeof(UCHARSTRENUM_VT)); 368 result->uenum.context = (void*)strings; 369 result->index = 0; 370 result->count = count; 371 } 372 } 373 return (UEnumeration*) result; 374} 375 376U_CAPI UEnumeration* U_EXPORT2 377uenum_openUCharStringsEnumeration(const UChar* const strings[], int32_t count, 378 UErrorCode* ec) { 379 UCharStringEnumeration* result = NULL; 380 if (U_SUCCESS(*ec) && count >= 0 && (count == 0 || strings != 0)) { 381 result = (UCharStringEnumeration*) uprv_malloc(sizeof(UCharStringEnumeration)); 382 if (result == NULL) { 383 *ec = U_MEMORY_ALLOCATION_ERROR; 384 } else { 385 U_ASSERT((char*)result==(char*)(&result->uenum)); 386 uprv_memcpy(result, &UCHARSTRENUM_U_VT, sizeof(UCHARSTRENUM_U_VT)); 387 result->uenum.context = (void*)strings; 388 result->index = 0; 389 result->count = count; 390 } 391 } 392 return (UEnumeration*) result; 393} 394 395 396// end C Wrapper 397