| File: | root/firefox-clang/intl/icu/source/common/ucnv.cpp |
| Warning: | line 1943, column 21 Although the value stored to 's' is used in the enclosing expression, the value is never actually read from 's' |
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| 1 | // © 2016 and later: Unicode, Inc. and others. |
| 2 | // License & terms of use: http://www.unicode.org/copyright.html |
| 3 | /* |
| 4 | ****************************************************************************** |
| 5 | * |
| 6 | * Copyright (C) 1998-2016, International Business Machines |
| 7 | * Corporation and others. All Rights Reserved. |
| 8 | * |
| 9 | ****************************************************************************** |
| 10 | * |
| 11 | * ucnv.c: |
| 12 | * Implements APIs for the ICU's codeset conversion library; |
| 13 | * mostly calls through internal functions; |
| 14 | * created by Bertrand A. Damiba |
| 15 | * |
| 16 | * Modification History: |
| 17 | * |
| 18 | * Date Name Description |
| 19 | * 04/04/99 helena Fixed internal header inclusion. |
| 20 | * 05/09/00 helena Added implementation to handle fallback mappings. |
| 21 | * 06/20/2000 helena OS/400 port changes; mostly typecast. |
| 22 | */ |
| 23 | |
| 24 | #include "unicode/utypes.h" |
| 25 | |
| 26 | #if !UCONFIG_NO_CONVERSION0 |
| 27 | |
| 28 | #include <memory> |
| 29 | |
| 30 | #include "unicode/ustring.h" |
| 31 | #include "unicode/ucnv.h" |
| 32 | #include "unicode/ucnv_err.h" |
| 33 | #include "unicode/uset.h" |
| 34 | #include "unicode/utf.h" |
| 35 | #include "unicode/utf16.h" |
| 36 | #include "putilimp.h" |
| 37 | #include "cmemory.h" |
| 38 | #include "cstring.h" |
| 39 | #include "uassert.h" |
| 40 | #include "utracimp.h" |
| 41 | #include "ustr_imp.h" |
| 42 | #include "ucnv_imp.h" |
| 43 | #include "ucnv_cnv.h" |
| 44 | #include "ucnv_bld.h" |
| 45 | |
| 46 | /* size of intermediate and preflighting buffers in ucnv_convert() */ |
| 47 | #define CHUNK_SIZE1024 1024 |
| 48 | |
| 49 | typedef struct UAmbiguousConverter { |
| 50 | const char *name; |
| 51 | const char16_t variant5c; |
| 52 | } UAmbiguousConverter; |
| 53 | |
| 54 | static const UAmbiguousConverter ambiguousConverters[]={ |
| 55 | { "ibm-897_P100-1995", 0xa5 }, |
| 56 | { "ibm-942_P120-1999", 0xa5 }, |
| 57 | { "ibm-943_P130-1999", 0xa5 }, |
| 58 | { "ibm-946_P100-1995", 0xa5 }, |
| 59 | { "ibm-33722_P120-1999", 0xa5 }, |
| 60 | { "ibm-1041_P100-1995", 0xa5 }, |
| 61 | /*{ "ibm-54191_P100-2006", 0xa5 },*/ |
| 62 | /*{ "ibm-62383_P100-2007", 0xa5 },*/ |
| 63 | /*{ "ibm-891_P100-1995", 0x20a9 },*/ |
| 64 | { "ibm-944_P100-1995", 0x20a9 }, |
| 65 | { "ibm-949_P110-1999", 0x20a9 }, |
| 66 | { "ibm-1363_P110-1997", 0x20a9 }, |
| 67 | { "ISO_2022,locale=ko,version=0", 0x20a9 }, |
| 68 | { "ibm-1088_P100-1995", 0x20a9 } |
| 69 | }; |
| 70 | |
| 71 | /*Calls through createConverter */ |
| 72 | U_CAPIextern "C" UConverter* U_EXPORT2 |
| 73 | ucnv_open (const char *name, |
| 74 | UErrorCode * err) |
| 75 | { |
| 76 | UConverter *r; |
| 77 | |
| 78 | if (err == nullptr || U_FAILURE (*err)) { |
| 79 | return nullptr; |
| 80 | } |
| 81 | |
| 82 | r = ucnv_createConverter(nullptr, name, err); |
| 83 | return r; |
| 84 | } |
| 85 | |
| 86 | U_CAPIextern "C" UConverter* U_EXPORT2 |
| 87 | ucnv_openPackage (const char *packageName, const char *converterName, UErrorCode * err) |
| 88 | { |
| 89 | return ucnv_createConverterFromPackage(packageName, converterName, err); |
| 90 | } |
| 91 | |
| 92 | /*Extracts the char16_t* to a char* and calls through createConverter */ |
| 93 | U_CAPIextern "C" UConverter* U_EXPORT2 |
| 94 | ucnv_openU (const char16_t * name, |
| 95 | UErrorCode * err) |
| 96 | { |
| 97 | char asciiName[UCNV_MAX_CONVERTER_NAME_LENGTH60]; |
| 98 | |
| 99 | if (err == nullptr || U_FAILURE(*err)) |
| 100 | return nullptr; |
| 101 | if (name == nullptr) |
| 102 | return ucnv_open (nullptr, err); |
| 103 | if (u_strlen(name) >= UCNV_MAX_CONVERTER_NAME_LENGTH60) |
| 104 | { |
| 105 | *err = U_ILLEGAL_ARGUMENT_ERROR; |
| 106 | return nullptr; |
| 107 | } |
| 108 | return ucnv_open(u_austrcpy(asciiName, name), err); |
| 109 | } |
| 110 | |
| 111 | /* Copy the string that is represented by the UConverterPlatform enum |
| 112 | * @param platformString An output buffer |
| 113 | * @param platform An enum representing a platform |
| 114 | * @return the length of the copied string. |
| 115 | */ |
| 116 | static int32_t |
| 117 | ucnv_copyPlatformString(char *platformString, UConverterPlatform pltfrm) |
| 118 | { |
| 119 | switch (pltfrm) |
| 120 | { |
| 121 | case UCNV_IBM: |
| 122 | uprv_strcpy(platformString, "ibm-"):: strcpy(platformString, "ibm-"); |
| 123 | return 4; |
| 124 | case UCNV_UNKNOWN: |
| 125 | break; |
| 126 | } |
| 127 | |
| 128 | /* default to empty string */ |
| 129 | *platformString = 0; |
| 130 | return 0; |
| 131 | } |
| 132 | |
| 133 | /*Assumes a $platform-#codepage.$CONVERTER_FILE_EXTENSION scheme and calls |
| 134 | *through createConverter*/ |
| 135 | U_CAPIextern "C" UConverter* U_EXPORT2 |
| 136 | ucnv_openCCSID (int32_t codepage, |
| 137 | UConverterPlatform platform, |
| 138 | UErrorCode * err) |
| 139 | { |
| 140 | char myName[UCNV_MAX_CONVERTER_NAME_LENGTH60]; |
| 141 | int32_t myNameLen; |
| 142 | |
| 143 | if (err == nullptr || U_FAILURE (*err)) |
| 144 | return nullptr; |
| 145 | |
| 146 | /* ucnv_copyPlatformString could return "ibm-" or "cp" */ |
| 147 | myNameLen = ucnv_copyPlatformString(myName, platform); |
| 148 | T_CString_integerToString(myName + myNameLen, codepage, 10); |
| 149 | |
| 150 | return ucnv_createConverter(nullptr, myName, err); |
| 151 | } |
| 152 | |
| 153 | /* Creating a temporary stack-based object that can be used in one thread, |
| 154 | and created from a converter that is shared across threads. |
| 155 | */ |
| 156 | |
| 157 | U_CAPIextern "C" UConverter* U_EXPORT2 |
| 158 | ucnv_safeClone(const UConverter* cnv, void *stackBuffer, int32_t *pBufferSize, UErrorCode *status) |
| 159 | { |
| 160 | UConverter *localConverter, *allocatedConverter; |
| 161 | int32_t stackBufferSize; |
| 162 | int32_t bufferSizeNeeded; |
| 163 | UErrorCode cbErr; |
| 164 | UConverterToUnicodeArgs toUArgs = { |
| 165 | sizeof(UConverterToUnicodeArgs), |
| 166 | true, |
| 167 | nullptr, |
| 168 | nullptr, |
| 169 | nullptr, |
| 170 | nullptr, |
| 171 | nullptr, |
| 172 | nullptr |
| 173 | }; |
| 174 | UConverterFromUnicodeArgs fromUArgs = { |
| 175 | sizeof(UConverterFromUnicodeArgs), |
| 176 | true, |
| 177 | nullptr, |
| 178 | nullptr, |
| 179 | nullptr, |
| 180 | nullptr, |
| 181 | nullptr, |
| 182 | nullptr |
| 183 | }; |
| 184 | |
| 185 | UTRACE_ENTRY_OC(UTRACE_UCNV_CLONE); |
| 186 | |
| 187 | if (status == nullptr || U_FAILURE(*status)){ |
| 188 | UTRACE_EXIT_STATUS(status? *status: U_ILLEGAL_ARGUMENT_ERROR); |
| 189 | return nullptr; |
| 190 | } |
| 191 | |
| 192 | if (cnv == nullptr) { |
| 193 | *status = U_ILLEGAL_ARGUMENT_ERROR; |
| 194 | UTRACE_EXIT_STATUS(*status); |
| 195 | return nullptr; |
| 196 | } |
| 197 | |
| 198 | UTRACE_DATA3(UTRACE_OPEN_CLOSE, "clone converter %s at %p into stackBuffer %p", |
| 199 | ucnv_getName(cnv, status), cnv, stackBuffer); |
| 200 | |
| 201 | if (cnv->sharedData->impl->safeClone != nullptr) { |
| 202 | /* call the custom safeClone function for sizing */ |
| 203 | bufferSizeNeeded = 0; |
| 204 | cnv->sharedData->impl->safeClone(cnv, nullptr, &bufferSizeNeeded, status); |
| 205 | if (U_FAILURE(*status)) { |
| 206 | UTRACE_EXIT_STATUS(*status); |
| 207 | return nullptr; |
| 208 | } |
| 209 | } |
| 210 | else |
| 211 | { |
| 212 | /* inherent sizing */ |
| 213 | bufferSizeNeeded = sizeof(UConverter); |
| 214 | } |
| 215 | |
| 216 | if (pBufferSize == nullptr) { |
| 217 | stackBufferSize = 1; |
| 218 | pBufferSize = &stackBufferSize; |
| 219 | } else { |
| 220 | stackBufferSize = *pBufferSize; |
| 221 | if (stackBufferSize <= 0){ /* 'preflighting' request - set needed size into *pBufferSize */ |
| 222 | *pBufferSize = bufferSizeNeeded; |
| 223 | UTRACE_EXIT_VALUE(bufferSizeNeeded); |
| 224 | return nullptr; |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | /* Adjust (if necessary) the stackBuffer pointer to be aligned correctly for a UConverter. |
| 229 | * TODO(Jira ICU-20736) Redo this using std::align() once g++4.9 compatibility is no longer needed. |
| 230 | */ |
| 231 | if (stackBuffer) { |
| 232 | uintptr_t p = reinterpret_cast<uintptr_t>(stackBuffer); |
| 233 | uintptr_t aligned_p = (p + alignof(UConverter) - 1) & ~(alignof(UConverter) - 1); |
| 234 | ptrdiff_t pointerAdjustment = aligned_p - p; |
| 235 | if (bufferSizeNeeded + pointerAdjustment <= stackBufferSize) { |
| 236 | stackBuffer = reinterpret_cast<void *>(aligned_p); |
| 237 | stackBufferSize -= static_cast<int32_t>(pointerAdjustment); |
| 238 | } else { |
| 239 | /* prevent using the stack buffer but keep the size > 0 so that we do not just preflight */ |
| 240 | stackBufferSize = 1; |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | /* Now, see if we must allocate any memory */ |
| 245 | if (stackBufferSize < bufferSizeNeeded || stackBuffer == nullptr) |
| 246 | { |
| 247 | /* allocate one here...*/ |
| 248 | localConverter = allocatedConverter = (UConverter *) uprv_malloc (bufferSizeNeeded); |
| 249 | |
| 250 | if(localConverter == nullptr) { |
| 251 | *status = U_MEMORY_ALLOCATION_ERROR; |
| 252 | UTRACE_EXIT_STATUS(*status); |
| 253 | return nullptr; |
| 254 | } |
| 255 | // If pBufferSize was nullptr as the input, pBufferSize is set to &stackBufferSize in this function. |
| 256 | if (pBufferSize != &stackBufferSize) { |
| 257 | *status = U_SAFECLONE_ALLOCATED_WARNING; |
| 258 | } |
| 259 | |
| 260 | /* record the fact that memory was allocated */ |
| 261 | *pBufferSize = bufferSizeNeeded; |
| 262 | } else { |
| 263 | /* just use the stack buffer */ |
| 264 | localConverter = (UConverter*) stackBuffer; |
| 265 | allocatedConverter = nullptr; |
| 266 | } |
| 267 | |
| 268 | uprv_memset(localConverter, 0, bufferSizeNeeded):: memset(localConverter, 0, bufferSizeNeeded); |
| 269 | |
| 270 | /* Copy initial state */ |
| 271 | uprv_memcpy(localConverter, cnv, sizeof(UConverter))do { clang diagnostic push
clang diagnostic ignored "-Waddress" (static_cast <bool> (localConverter != __null) ? void (0) : __assert_fail ("localConverter != __null", __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__)); ( static_cast <bool> (cnv != __null) ? void (0) : __assert_fail ("cnv != __null", __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__)); clang diagnostic pop :: memcpy(localConverter , cnv, sizeof(UConverter)); } while (false); |
| 272 | localConverter->isCopyLocal = localConverter->isExtraLocal = false; |
| 273 | |
| 274 | /* copy the substitution string */ |
| 275 | if (cnv->subChars == (uint8_t *)cnv->subUChars) { |
| 276 | localConverter->subChars = (uint8_t *)localConverter->subUChars; |
| 277 | } else { |
| 278 | localConverter->subChars = (uint8_t *)uprv_malloc(UCNV_ERROR_BUFFER_LENGTH32 * U_SIZEOF_UCHAR2); |
| 279 | if (localConverter->subChars == nullptr) { |
| 280 | uprv_free(allocatedConverter); |
| 281 | UTRACE_EXIT_STATUS(*status); |
| 282 | return nullptr; |
| 283 | } |
| 284 | uprv_memcpy(localConverter->subChars, cnv->subChars, UCNV_ERROR_BUFFER_LENGTH * U_SIZEOF_UCHAR)do { clang diagnostic push
clang diagnostic ignored "-Waddress" (static_cast <bool> (localConverter->subChars != __null ) ? void (0) : __assert_fail ("localConverter->subChars != __null" , __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__ )); (static_cast <bool> (cnv->subChars != __null) ? void (0) : __assert_fail ("cnv->subChars != __null", __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__)); clang diagnostic pop :: memcpy(localConverter->subChars, cnv-> subChars, 32 * 2); } while (false); |
| 285 | } |
| 286 | |
| 287 | /* now either call the safeclone fcn or not */ |
| 288 | if (cnv->sharedData->impl->safeClone != nullptr) { |
| 289 | /* call the custom safeClone function */ |
| 290 | localConverter = cnv->sharedData->impl->safeClone(cnv, localConverter, pBufferSize, status); |
| 291 | } |
| 292 | |
| 293 | if(localConverter==nullptr || U_FAILURE(*status)) { |
| 294 | if (allocatedConverter != nullptr && allocatedConverter->subChars != (uint8_t *)allocatedConverter->subUChars) { |
| 295 | uprv_free(allocatedConverter->subChars); |
| 296 | } |
| 297 | uprv_free(allocatedConverter); |
| 298 | UTRACE_EXIT_STATUS(*status); |
| 299 | return nullptr; |
| 300 | } |
| 301 | |
| 302 | /* increment refcount of shared data if needed */ |
| 303 | if (cnv->sharedData->isReferenceCounted) { |
| 304 | ucnv_incrementRefCount(cnv->sharedData); |
| 305 | } |
| 306 | |
| 307 | if(localConverter == (UConverter*)stackBuffer) { |
| 308 | /* we're using user provided data - set to not destroy */ |
| 309 | localConverter->isCopyLocal = true; |
| 310 | } |
| 311 | |
| 312 | /* allow callback functions to handle any memory allocation */ |
| 313 | toUArgs.converter = fromUArgs.converter = localConverter; |
| 314 | cbErr = U_ZERO_ERROR; |
| 315 | cnv->fromCharErrorBehaviour(cnv->toUContext, &toUArgs, nullptr, 0, UCNV_CLONE, &cbErr); |
| 316 | cbErr = U_ZERO_ERROR; |
| 317 | cnv->fromUCharErrorBehaviour(cnv->fromUContext, &fromUArgs, nullptr, 0, 0, UCNV_CLONE, &cbErr); |
| 318 | |
| 319 | UTRACE_EXIT_PTR_STATUS(localConverter, *status); |
| 320 | return localConverter; |
| 321 | } |
| 322 | |
| 323 | U_CAPIextern "C" UConverter* U_EXPORT2 |
| 324 | ucnv_clone(const UConverter* cnv, UErrorCode *status) |
| 325 | { |
| 326 | return ucnv_safeClone(cnv, nullptr, nullptr, status); |
| 327 | } |
| 328 | |
| 329 | /*Decreases the reference counter in the shared immutable section of the object |
| 330 | *and frees the mutable part*/ |
| 331 | |
| 332 | U_CAPIextern "C" void U_EXPORT2 |
| 333 | ucnv_close (UConverter * converter) |
| 334 | { |
| 335 | UErrorCode errorCode = U_ZERO_ERROR; |
| 336 | |
| 337 | UTRACE_ENTRY_OC(UTRACE_UCNV_CLOSE); |
| 338 | |
| 339 | if (converter == nullptr) |
| 340 | { |
| 341 | UTRACE_EXIT(); |
| 342 | return; |
| 343 | } |
| 344 | |
| 345 | UTRACE_DATA3(UTRACE_OPEN_CLOSE, "close converter %s at %p, isCopyLocal=%b", |
| 346 | ucnv_getName(converter, &errorCode), converter, converter->isCopyLocal); |
| 347 | |
| 348 | /* In order to speed up the close, only call the callbacks when they have been changed. |
| 349 | This performance check will only work when the callbacks are set within a shared library |
| 350 | or from user code that statically links this code. */ |
| 351 | /* first, notify the callback functions that the converter is closed */ |
| 352 | if (converter->fromCharErrorBehaviour != UCNV_TO_U_DEFAULT_CALLBACK((UConverterToUCallback) UCNV_TO_U_CALLBACK_SUBSTITUTE)) { |
| 353 | UConverterToUnicodeArgs toUArgs = { |
| 354 | sizeof(UConverterToUnicodeArgs), |
| 355 | true, |
| 356 | nullptr, |
| 357 | nullptr, |
| 358 | nullptr, |
| 359 | nullptr, |
| 360 | nullptr, |
| 361 | nullptr |
| 362 | }; |
| 363 | |
| 364 | toUArgs.converter = converter; |
| 365 | errorCode = U_ZERO_ERROR; |
| 366 | converter->fromCharErrorBehaviour(converter->toUContext, &toUArgs, nullptr, 0, UCNV_CLOSE, &errorCode); |
| 367 | } |
| 368 | if (converter->fromUCharErrorBehaviour != UCNV_FROM_U_DEFAULT_CALLBACK((UConverterFromUCallback) UCNV_FROM_U_CALLBACK_SUBSTITUTE)) { |
| 369 | UConverterFromUnicodeArgs fromUArgs = { |
| 370 | sizeof(UConverterFromUnicodeArgs), |
| 371 | true, |
| 372 | nullptr, |
| 373 | nullptr, |
| 374 | nullptr, |
| 375 | nullptr, |
| 376 | nullptr, |
| 377 | nullptr |
| 378 | }; |
| 379 | fromUArgs.converter = converter; |
| 380 | errorCode = U_ZERO_ERROR; |
| 381 | converter->fromUCharErrorBehaviour(converter->fromUContext, &fromUArgs, nullptr, 0, 0, UCNV_CLOSE, &errorCode); |
| 382 | } |
| 383 | |
| 384 | if (converter->sharedData->impl->close != nullptr) { |
| 385 | converter->sharedData->impl->close(converter); |
| 386 | } |
| 387 | |
| 388 | if (converter->subChars != (uint8_t *)converter->subUChars) { |
| 389 | uprv_free(converter->subChars); |
| 390 | } |
| 391 | |
| 392 | if (converter->sharedData->isReferenceCounted) { |
| 393 | ucnv_unloadSharedDataIfReady(converter->sharedData); |
| 394 | } |
| 395 | |
| 396 | if(!converter->isCopyLocal){ |
| 397 | uprv_free(converter); |
| 398 | } |
| 399 | |
| 400 | UTRACE_EXIT(); |
| 401 | } |
| 402 | |
| 403 | /*returns a single Name from the list, will return nullptr if out of bounds |
| 404 | */ |
| 405 | U_CAPIextern "C" const char* U_EXPORT2 |
| 406 | ucnv_getAvailableName (int32_t n) |
| 407 | { |
| 408 | if (0 <= n && n <= 0xffff) { |
| 409 | UErrorCode err = U_ZERO_ERROR; |
| 410 | const char *name = ucnv_bld_getAvailableConverter((uint16_t)n, &err); |
| 411 | if (U_SUCCESS(err)) { |
| 412 | return name; |
| 413 | } |
| 414 | } |
| 415 | return nullptr; |
| 416 | } |
| 417 | |
| 418 | U_CAPIextern "C" int32_t U_EXPORT2 |
| 419 | ucnv_countAvailable () |
| 420 | { |
| 421 | UErrorCode err = U_ZERO_ERROR; |
| 422 | return ucnv_bld_countAvailableConverters(&err); |
| 423 | } |
| 424 | |
| 425 | U_CAPIextern "C" void U_EXPORT2 |
| 426 | ucnv_getSubstChars (const UConverter * converter, |
| 427 | char *mySubChar, |
| 428 | int8_t * len, |
| 429 | UErrorCode * err) |
| 430 | { |
| 431 | if (U_FAILURE (*err)) |
| 432 | return; |
| 433 | |
| 434 | if (converter->subCharLen <= 0) { |
| 435 | /* Unicode string or empty string from ucnv_setSubstString(). */ |
| 436 | *len = 0; |
| 437 | return; |
| 438 | } |
| 439 | |
| 440 | if (*len < converter->subCharLen) /*not enough space in subChars */ |
| 441 | { |
| 442 | *err = U_INDEX_OUTOFBOUNDS_ERROR; |
| 443 | return; |
| 444 | } |
| 445 | |
| 446 | uprv_memcpy (mySubChar, converter->subChars, converter->subCharLen)do { clang diagnostic push
clang diagnostic ignored "-Waddress" (static_cast <bool> (mySubChar != __null) ? void (0) : __assert_fail ("mySubChar != __null", __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__)); (static_cast <bool > (converter->subChars != __null) ? void (0) : __assert_fail ("converter->subChars != __null", __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__)); clang diagnostic pop :: memcpy(mySubChar, converter->subChars, converter-> subCharLen); } while (false); /*fills in the subchars */ |
| 447 | *len = converter->subCharLen; /*store # of bytes copied to buffer */ |
| 448 | } |
| 449 | |
| 450 | U_CAPIextern "C" void U_EXPORT2 |
| 451 | ucnv_setSubstChars (UConverter * converter, |
| 452 | const char *mySubChar, |
| 453 | int8_t len, |
| 454 | UErrorCode * err) |
| 455 | { |
| 456 | if (U_FAILURE (*err)) |
| 457 | return; |
| 458 | |
| 459 | /*Makes sure that the subChar is within the codepages char length boundaries */ |
| 460 | if ((len > converter->sharedData->staticData->maxBytesPerChar) |
| 461 | || (len < converter->sharedData->staticData->minBytesPerChar)) |
| 462 | { |
| 463 | *err = U_ILLEGAL_ARGUMENT_ERROR; |
| 464 | return; |
| 465 | } |
| 466 | |
| 467 | uprv_memcpy (converter->subChars, mySubChar, len)do { clang diagnostic push
clang diagnostic ignored "-Waddress" (static_cast <bool> (converter->subChars != __null ) ? void (0) : __assert_fail ("converter->subChars != __null" , __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__ )); (static_cast <bool> (mySubChar != __null) ? void (0 ) : __assert_fail ("mySubChar != __null", __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__)); clang diagnostic pop :: memcpy(converter->subChars, mySubChar, len); } while ( false); /*copies the subchars */ |
| 468 | converter->subCharLen = len; /*sets the new len */ |
| 469 | |
| 470 | /* |
| 471 | * There is currently (2001Feb) no separate API to set/get subChar1. |
| 472 | * In order to always have subChar written after it is explicitly set, |
| 473 | * we set subChar1 to 0. |
| 474 | */ |
| 475 | converter->subChar1 = 0; |
| 476 | } |
| 477 | |
| 478 | U_CAPIextern "C" void U_EXPORT2 |
| 479 | ucnv_setSubstString(UConverter *cnv, |
| 480 | const char16_t *s, |
| 481 | int32_t length, |
| 482 | UErrorCode *err) { |
| 483 | alignas(UConverter) char cloneBuffer[U_CNV_SAFECLONE_BUFFERSIZE1024]; |
| 484 | char chars[UCNV_ERROR_BUFFER_LENGTH32]; |
| 485 | |
| 486 | UConverter *clone; |
| 487 | uint8_t *subChars; |
| 488 | int32_t cloneSize, length8; |
| 489 | |
| 490 | /* Let the following functions check all arguments. */ |
| 491 | cloneSize = sizeof(cloneBuffer); |
| 492 | clone = ucnv_safeClone(cnv, cloneBuffer, &cloneSize, err); |
| 493 | ucnv_setFromUCallBack(clone, UCNV_FROM_U_CALLBACK_STOP, nullptr, nullptr, nullptr, err); |
| 494 | length8 = ucnv_fromUChars(clone, chars, (int32_t)sizeof(chars), s, length, err); |
| 495 | ucnv_close(clone); |
| 496 | if (U_FAILURE(*err)) { |
| 497 | return; |
| 498 | } |
| 499 | |
| 500 | if (cnv->sharedData->impl->writeSub == nullptr |
| 501 | #if !UCONFIG_NO_LEGACY_CONVERSION1 |
| 502 | || (cnv->sharedData->staticData->conversionType == UCNV_MBCS && |
| 503 | ucnv_MBCSGetType(cnv) != UCNV_EBCDIC_STATEFUL) |
| 504 | #endif |
| 505 | ) { |
| 506 | /* The converter is not stateful. Store the charset bytes as a fixed string. */ |
| 507 | subChars = (uint8_t *)chars; |
| 508 | } else { |
| 509 | /* |
| 510 | * The converter has a non-default writeSub() function, indicating |
| 511 | * that it is stateful. |
| 512 | * Store the Unicode string for on-the-fly conversion for correct |
| 513 | * state handling. |
| 514 | */ |
| 515 | if (length > UCNV_ERROR_BUFFER_LENGTH32) { |
| 516 | /* |
| 517 | * Should not occur. The converter should output at least one byte |
| 518 | * per char16_t, which means that ucnv_fromUChars() should catch all |
| 519 | * overflows. |
| 520 | */ |
| 521 | *err = U_BUFFER_OVERFLOW_ERROR; |
| 522 | return; |
| 523 | } |
| 524 | subChars = (uint8_t *)s; |
| 525 | if (length < 0) { |
| 526 | length = u_strlen(s); |
| 527 | } |
| 528 | length8 = length * U_SIZEOF_UCHAR2; |
| 529 | } |
| 530 | |
| 531 | /* |
| 532 | * For storing the substitution string, select either the small buffer inside |
| 533 | * UConverter or allocate a subChars buffer. |
| 534 | */ |
| 535 | if (length8 > UCNV_MAX_SUBCHAR_LEN4) { |
| 536 | /* Use a separate buffer for the string. Outside UConverter to not make it too large. */ |
| 537 | if (cnv->subChars == (uint8_t *)cnv->subUChars) { |
| 538 | /* Allocate a new buffer for the string. */ |
| 539 | cnv->subChars = (uint8_t *)uprv_malloc(UCNV_ERROR_BUFFER_LENGTH32 * U_SIZEOF_UCHAR2); |
| 540 | if (cnv->subChars == nullptr) { |
| 541 | cnv->subChars = (uint8_t *)cnv->subUChars; |
| 542 | *err = U_MEMORY_ALLOCATION_ERROR; |
| 543 | return; |
| 544 | } |
| 545 | uprv_memset(cnv->subChars, 0, UCNV_ERROR_BUFFER_LENGTH * U_SIZEOF_UCHAR):: memset(cnv->subChars, 0, 32 * 2); |
| 546 | } |
| 547 | } |
| 548 | |
| 549 | /* Copy the substitution string into the UConverter or its subChars buffer. */ |
| 550 | if (length8 == 0) { |
| 551 | cnv->subCharLen = 0; |
| 552 | } else { |
| 553 | uprv_memcpy(cnv->subChars, subChars, length8)do { clang diagnostic push
clang diagnostic ignored "-Waddress" (static_cast <bool> (cnv->subChars != __null) ? void (0) : __assert_fail ("cnv->subChars != __null", __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__)); ( static_cast <bool> (subChars != __null) ? void (0) : __assert_fail ("subChars != __null", __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__)); clang diagnostic pop :: memcpy(cnv->subChars, subChars, length8); } while (false); |
| 554 | if (subChars == (uint8_t *)chars) { |
| 555 | cnv->subCharLen = (int8_t)length8; |
| 556 | } else /* subChars == s */ { |
| 557 | cnv->subCharLen = (int8_t)-length; |
| 558 | } |
| 559 | } |
| 560 | |
| 561 | /* See comment in ucnv_setSubstChars(). */ |
| 562 | cnv->subChar1 = 0; |
| 563 | } |
| 564 | |
| 565 | /*resets the internal states of a converter |
| 566 | *goal : have the same behaviour than a freshly created converter |
| 567 | */ |
| 568 | static void _reset(UConverter *converter, UConverterResetChoice choice, |
| 569 | UBool callCallback) { |
| 570 | if(converter == nullptr) { |
| 571 | return; |
| 572 | } |
| 573 | |
| 574 | if(callCallback) { |
| 575 | /* first, notify the callback functions that the converter is reset */ |
| 576 | UErrorCode errorCode; |
| 577 | |
| 578 | if(choice<=UCNV_RESET_TO_UNICODE && converter->fromCharErrorBehaviour != UCNV_TO_U_DEFAULT_CALLBACK((UConverterToUCallback) UCNV_TO_U_CALLBACK_SUBSTITUTE)) { |
| 579 | UConverterToUnicodeArgs toUArgs = { |
| 580 | sizeof(UConverterToUnicodeArgs), |
| 581 | true, |
| 582 | nullptr, |
| 583 | nullptr, |
| 584 | nullptr, |
| 585 | nullptr, |
| 586 | nullptr, |
| 587 | nullptr |
| 588 | }; |
| 589 | toUArgs.converter = converter; |
| 590 | errorCode = U_ZERO_ERROR; |
| 591 | converter->fromCharErrorBehaviour(converter->toUContext, &toUArgs, nullptr, 0, UCNV_RESET, &errorCode); |
| 592 | } |
| 593 | if(choice!=UCNV_RESET_TO_UNICODE && converter->fromUCharErrorBehaviour != UCNV_FROM_U_DEFAULT_CALLBACK((UConverterFromUCallback) UCNV_FROM_U_CALLBACK_SUBSTITUTE)) { |
| 594 | UConverterFromUnicodeArgs fromUArgs = { |
| 595 | sizeof(UConverterFromUnicodeArgs), |
| 596 | true, |
| 597 | nullptr, |
| 598 | nullptr, |
| 599 | nullptr, |
| 600 | nullptr, |
| 601 | nullptr, |
| 602 | nullptr |
| 603 | }; |
| 604 | fromUArgs.converter = converter; |
| 605 | errorCode = U_ZERO_ERROR; |
| 606 | converter->fromUCharErrorBehaviour(converter->fromUContext, &fromUArgs, nullptr, 0, 0, UCNV_RESET, &errorCode); |
| 607 | } |
| 608 | } |
| 609 | |
| 610 | /* now reset the converter itself */ |
| 611 | if(choice<=UCNV_RESET_TO_UNICODE) { |
| 612 | converter->toUnicodeStatus = converter->sharedData->toUnicodeStatus; |
| 613 | converter->mode = 0; |
| 614 | converter->toULength = 0; |
| 615 | converter->invalidCharLength = converter->UCharErrorBufferLength = 0; |
| 616 | converter->preToULength = 0; |
| 617 | } |
| 618 | if(choice!=UCNV_RESET_TO_UNICODE) { |
| 619 | converter->fromUnicodeStatus = 0; |
| 620 | converter->fromUChar32 = 0; |
| 621 | converter->invalidUCharLength = converter->charErrorBufferLength = 0; |
| 622 | converter->preFromUFirstCP = U_SENTINEL(-1); |
| 623 | converter->preFromULength = 0; |
| 624 | } |
| 625 | |
| 626 | if (converter->sharedData->impl->reset != nullptr) { |
| 627 | /* call the custom reset function */ |
| 628 | converter->sharedData->impl->reset(converter, choice); |
| 629 | } |
| 630 | } |
| 631 | |
| 632 | U_CAPIextern "C" void U_EXPORT2 |
| 633 | ucnv_reset(UConverter *converter) |
| 634 | { |
| 635 | _reset(converter, UCNV_RESET_BOTH, true); |
| 636 | } |
| 637 | |
| 638 | U_CAPIextern "C" void U_EXPORT2 |
| 639 | ucnv_resetToUnicode(UConverter *converter) |
| 640 | { |
| 641 | _reset(converter, UCNV_RESET_TO_UNICODE, true); |
| 642 | } |
| 643 | |
| 644 | U_CAPIextern "C" void U_EXPORT2 |
| 645 | ucnv_resetFromUnicode(UConverter *converter) |
| 646 | { |
| 647 | _reset(converter, UCNV_RESET_FROM_UNICODE, true); |
| 648 | } |
| 649 | |
| 650 | U_CAPIextern "C" int8_t U_EXPORT2 |
| 651 | ucnv_getMaxCharSize (const UConverter * converter) |
| 652 | { |
| 653 | return converter->maxBytesPerUChar; |
| 654 | } |
| 655 | |
| 656 | |
| 657 | U_CAPIextern "C" int8_t U_EXPORT2 |
| 658 | ucnv_getMinCharSize (const UConverter * converter) |
| 659 | { |
| 660 | return converter->sharedData->staticData->minBytesPerChar; |
| 661 | } |
| 662 | |
| 663 | U_CAPIextern "C" const char* U_EXPORT2 |
| 664 | ucnv_getName (const UConverter * converter, UErrorCode * err) |
| 665 | |
| 666 | { |
| 667 | if (U_FAILURE (*err)) |
| 668 | return nullptr; |
| 669 | if(converter->sharedData->impl->getName){ |
| 670 | const char* temp= converter->sharedData->impl->getName(converter); |
| 671 | if(temp) |
| 672 | return temp; |
| 673 | } |
| 674 | return converter->sharedData->staticData->name; |
| 675 | } |
| 676 | |
| 677 | U_CAPIextern "C" int32_t U_EXPORT2 |
| 678 | ucnv_getCCSID(const UConverter * converter, |
| 679 | UErrorCode * err) |
| 680 | { |
| 681 | int32_t ccsid; |
| 682 | if (U_FAILURE (*err)) |
| 683 | return -1; |
| 684 | |
| 685 | ccsid = converter->sharedData->staticData->codepage; |
| 686 | if (ccsid == 0) { |
| 687 | /* Rare case. This is for cases like gb18030, |
| 688 | which doesn't have an IBM canonical name, but does have an IBM alias. */ |
| 689 | const char *standardName = ucnv_getStandardName(ucnv_getName(converter, err), "IBM", err); |
| 690 | if (U_SUCCESS(*err) && standardName) { |
| 691 | const char *ccsidStr = uprv_strchr(standardName, '-'):: strchr(standardName, '-'); |
| 692 | if (ccsidStr) { |
| 693 | ccsid = (int32_t)atol(ccsidStr+1); /* +1 to skip '-' */ |
| 694 | } |
| 695 | } |
| 696 | } |
| 697 | return ccsid; |
| 698 | } |
| 699 | |
| 700 | |
| 701 | U_CAPIextern "C" UConverterPlatform U_EXPORT2 |
| 702 | ucnv_getPlatform (const UConverter * converter, |
| 703 | UErrorCode * err) |
| 704 | { |
| 705 | if (U_FAILURE (*err)) |
| 706 | return UCNV_UNKNOWN; |
| 707 | |
| 708 | return (UConverterPlatform)converter->sharedData->staticData->platform; |
| 709 | } |
| 710 | |
| 711 | U_CAPIextern "C" void U_EXPORT2 |
| 712 | ucnv_getToUCallBack (const UConverter * converter, |
| 713 | UConverterToUCallback *action, |
| 714 | const void **context) |
| 715 | { |
| 716 | *action = converter->fromCharErrorBehaviour; |
| 717 | *context = converter->toUContext; |
| 718 | } |
| 719 | |
| 720 | U_CAPIextern "C" void U_EXPORT2 |
| 721 | ucnv_getFromUCallBack (const UConverter * converter, |
| 722 | UConverterFromUCallback *action, |
| 723 | const void **context) |
| 724 | { |
| 725 | *action = converter->fromUCharErrorBehaviour; |
| 726 | *context = converter->fromUContext; |
| 727 | } |
| 728 | |
| 729 | U_CAPIextern "C" void U_EXPORT2 |
| 730 | ucnv_setToUCallBack (UConverter * converter, |
| 731 | UConverterToUCallback newAction, |
| 732 | const void* newContext, |
| 733 | UConverterToUCallback *oldAction, |
| 734 | const void** oldContext, |
| 735 | UErrorCode * err) |
| 736 | { |
| 737 | if (U_FAILURE (*err)) |
| 738 | return; |
| 739 | if (oldAction) *oldAction = converter->fromCharErrorBehaviour; |
| 740 | converter->fromCharErrorBehaviour = newAction; |
| 741 | if (oldContext) *oldContext = converter->toUContext; |
| 742 | converter->toUContext = newContext; |
| 743 | } |
| 744 | |
| 745 | U_CAPIextern "C" void U_EXPORT2 |
| 746 | ucnv_setFromUCallBack (UConverter * converter, |
| 747 | UConverterFromUCallback newAction, |
| 748 | const void* newContext, |
| 749 | UConverterFromUCallback *oldAction, |
| 750 | const void** oldContext, |
| 751 | UErrorCode * err) |
| 752 | { |
| 753 | if (U_FAILURE (*err)) |
| 754 | return; |
| 755 | if (oldAction) *oldAction = converter->fromUCharErrorBehaviour; |
| 756 | converter->fromUCharErrorBehaviour = newAction; |
| 757 | if (oldContext) *oldContext = converter->fromUContext; |
| 758 | converter->fromUContext = newContext; |
| 759 | } |
| 760 | |
| 761 | static void |
| 762 | _updateOffsets(int32_t *offsets, int32_t length, |
| 763 | int32_t sourceIndex, int32_t errorInputLength) { |
| 764 | int32_t *limit; |
| 765 | int32_t delta, offset; |
| 766 | |
| 767 | if(sourceIndex>=0) { |
| 768 | /* |
| 769 | * adjust each offset by adding the previous sourceIndex |
| 770 | * minus the length of the input sequence that caused an |
| 771 | * error, if any |
| 772 | */ |
| 773 | delta=sourceIndex-errorInputLength; |
| 774 | } else { |
| 775 | /* |
| 776 | * set each offset to -1 because this conversion function |
| 777 | * does not handle offsets |
| 778 | */ |
| 779 | delta=-1; |
| 780 | } |
| 781 | |
| 782 | limit=offsets+length; |
| 783 | if(delta==0) { |
| 784 | /* most common case, nothing to do */ |
| 785 | } else if(delta>0) { |
| 786 | /* add the delta to each offset (but not if the offset is <0) */ |
| 787 | while(offsets<limit) { |
| 788 | offset=*offsets; |
| 789 | if(offset>=0) { |
| 790 | *offsets=offset+delta; |
| 791 | } |
| 792 | ++offsets; |
| 793 | } |
| 794 | } else /* delta<0 */ { |
| 795 | /* |
| 796 | * set each offset to -1 because this conversion function |
| 797 | * does not handle offsets |
| 798 | * or the error input sequence started in a previous buffer |
| 799 | */ |
| 800 | while(offsets<limit) { |
| 801 | *offsets++=-1; |
| 802 | } |
| 803 | } |
| 804 | } |
| 805 | |
| 806 | /* ucnv_fromUnicode --------------------------------------------------------- */ |
| 807 | |
| 808 | /* |
| 809 | * Implementation note for m:n conversions |
| 810 | * |
| 811 | * While collecting source units to find the longest match for m:n conversion, |
| 812 | * some source units may need to be stored for a partial match. |
| 813 | * When a second buffer does not yield a match on all of the previously stored |
| 814 | * source units, then they must be "replayed", i.e., fed back into the converter. |
| 815 | * |
| 816 | * The code relies on the fact that replaying will not nest - |
| 817 | * converting a replay buffer will not result in a replay. |
| 818 | * This is because a replay is necessary only after the _continuation_ of a |
| 819 | * partial match failed, but a replay buffer is converted as a whole. |
| 820 | * It may result in some of its units being stored again for a partial match, |
| 821 | * but there will not be a continuation _during_ the replay which could fail. |
| 822 | * |
| 823 | * It is conceivable that a callback function could call the converter |
| 824 | * recursively in a way that causes another replay to be stored, but that |
| 825 | * would be an error in the callback function. |
| 826 | * Such violations will cause assertion failures in a debug build, |
| 827 | * and wrong output, but they will not cause a crash. |
| 828 | */ |
| 829 | |
| 830 | static void |
| 831 | _fromUnicodeWithCallback(UConverterFromUnicodeArgs *pArgs, UErrorCode *err) { |
| 832 | UConverterFromUnicode fromUnicode; |
| 833 | UConverter *cnv; |
| 834 | const char16_t *s; |
| 835 | char *t; |
| 836 | int32_t *offsets; |
| 837 | int32_t sourceIndex; |
| 838 | int32_t errorInputLength; |
| 839 | UBool converterSawEndOfInput, calledCallback; |
| 840 | |
| 841 | /* variables for m:n conversion */ |
| 842 | char16_t replay[UCNV_EXT_MAX_UCHARS19]; |
| 843 | const char16_t *realSource, *realSourceLimit; |
| 844 | int32_t realSourceIndex; |
| 845 | UBool realFlush; |
| 846 | |
| 847 | cnv=pArgs->converter; |
| 848 | s=pArgs->source; |
| 849 | t=pArgs->target; |
| 850 | offsets=pArgs->offsets; |
| 851 | |
| 852 | /* get the converter implementation function */ |
| 853 | sourceIndex=0; |
| 854 | if(offsets==nullptr) { |
| 855 | fromUnicode=cnv->sharedData->impl->fromUnicode; |
| 856 | } else { |
| 857 | fromUnicode=cnv->sharedData->impl->fromUnicodeWithOffsets; |
| 858 | if(fromUnicode==nullptr) { |
| 859 | /* there is no WithOffsets implementation */ |
| 860 | fromUnicode=cnv->sharedData->impl->fromUnicode; |
| 861 | /* we will write -1 for each offset */ |
| 862 | sourceIndex=-1; |
| 863 | } |
| 864 | } |
| 865 | |
| 866 | if(cnv->preFromULength>=0) { |
| 867 | /* normal mode */ |
| 868 | realSource=nullptr; |
| 869 | |
| 870 | /* avoid compiler warnings - not otherwise necessary, and the values do not matter */ |
| 871 | realSourceLimit=nullptr; |
| 872 | realFlush=false; |
| 873 | realSourceIndex=0; |
| 874 | } else { |
| 875 | /* |
| 876 | * Previous m:n conversion stored source units from a partial match |
| 877 | * and failed to consume all of them. |
| 878 | * We need to "replay" them from a temporary buffer and convert them first. |
| 879 | */ |
| 880 | realSource=pArgs->source; |
| 881 | realSourceLimit=pArgs->sourceLimit; |
| 882 | realFlush=pArgs->flush; |
| 883 | realSourceIndex=sourceIndex; |
| 884 | |
| 885 | uprv_memcpy(replay, cnv->preFromU, -cnv->preFromULength*U_SIZEOF_UCHAR)do { clang diagnostic push
clang diagnostic ignored "-Waddress" (static_cast <bool> (replay != __null) ? void (0) : __assert_fail ("replay != __null", __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__)); (static_cast <bool> (cnv->preFromU != __null) ? void (0) : __assert_fail ("cnv->preFromU != __null" , __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__ )); clang diagnostic pop :: memcpy(replay, cnv->preFromU, -cnv->preFromULength*2); } while (false); |
| 886 | pArgs->source=replay; |
| 887 | pArgs->sourceLimit=replay-cnv->preFromULength; |
| 888 | pArgs->flush=false; |
| 889 | sourceIndex=-1; |
| 890 | |
| 891 | cnv->preFromULength=0; |
| 892 | } |
| 893 | |
| 894 | /* |
| 895 | * loop for conversion and error handling |
| 896 | * |
| 897 | * loop { |
| 898 | * convert |
| 899 | * loop { |
| 900 | * update offsets |
| 901 | * handle end of input |
| 902 | * handle errors/call callback |
| 903 | * } |
| 904 | * } |
| 905 | */ |
| 906 | for(;;) { |
| 907 | if(U_SUCCESS(*err)) { |
| 908 | /* convert */ |
| 909 | fromUnicode(pArgs, err); |
| 910 | |
| 911 | /* |
| 912 | * set a flag for whether the converter |
| 913 | * successfully processed the end of the input |
| 914 | * |
| 915 | * need not check cnv->preFromULength==0 because a replay (<0) will cause |
| 916 | * s<sourceLimit before converterSawEndOfInput is checked |
| 917 | */ |
| 918 | converterSawEndOfInput= |
| 919 | static_cast<UBool>(U_SUCCESS(*err) && |
| 920 | pArgs->flush && pArgs->source==pArgs->sourceLimit && |
| 921 | cnv->fromUChar32==0); |
| 922 | } else { |
| 923 | /* handle error from ucnv_convertEx() */ |
| 924 | converterSawEndOfInput=false; |
| 925 | } |
| 926 | |
| 927 | /* no callback called yet for this iteration */ |
| 928 | calledCallback=false; |
| 929 | |
| 930 | /* no sourceIndex adjustment for conversion, only for callback output */ |
| 931 | errorInputLength=0; |
| 932 | |
| 933 | /* |
| 934 | * loop for offsets and error handling |
| 935 | * |
| 936 | * iterates at most 3 times: |
| 937 | * 1. to clean up after the conversion function |
| 938 | * 2. after the callback |
| 939 | * 3. after the callback again if there was truncated input |
| 940 | */ |
| 941 | for(;;) { |
| 942 | /* update offsets if we write any */ |
| 943 | if(offsets!=nullptr) { |
| 944 | int32_t length = static_cast<int32_t>(pArgs->target - t); |
| 945 | if(length>0) { |
| 946 | _updateOffsets(offsets, length, sourceIndex, errorInputLength); |
| 947 | |
| 948 | /* |
| 949 | * if a converter handles offsets and updates the offsets |
| 950 | * pointer at the end, then pArgs->offset should not change |
| 951 | * here; |
| 952 | * however, some converters do not handle offsets at all |
| 953 | * (sourceIndex<0) or may not update the offsets pointer |
| 954 | */ |
| 955 | pArgs->offsets=offsets+=length; |
| 956 | } |
| 957 | |
| 958 | if(sourceIndex>=0) { |
| 959 | sourceIndex += static_cast<int32_t>(pArgs->source - s); |
| 960 | } |
| 961 | } |
| 962 | |
| 963 | if(cnv->preFromULength<0) { |
| 964 | /* |
| 965 | * switch the source to new replay units (cannot occur while replaying) |
| 966 | * after offset handling and before end-of-input and callback handling |
| 967 | */ |
| 968 | if(realSource==nullptr) { |
| 969 | realSource=pArgs->source; |
| 970 | realSourceLimit=pArgs->sourceLimit; |
| 971 | realFlush=pArgs->flush; |
| 972 | realSourceIndex=sourceIndex; |
| 973 | |
| 974 | uprv_memcpy(replay, cnv->preFromU, -cnv->preFromULength*U_SIZEOF_UCHAR)do { clang diagnostic push
clang diagnostic ignored "-Waddress" (static_cast <bool> (replay != __null) ? void (0) : __assert_fail ("replay != __null", __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__)); (static_cast <bool> (cnv->preFromU != __null) ? void (0) : __assert_fail ("cnv->preFromU != __null" , __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__ )); clang diagnostic pop :: memcpy(replay, cnv->preFromU, -cnv->preFromULength*2); } while (false); |
| 975 | pArgs->source=replay; |
| 976 | pArgs->sourceLimit=replay-cnv->preFromULength; |
| 977 | pArgs->flush=false; |
| 978 | if((sourceIndex+=cnv->preFromULength)<0) { |
| 979 | sourceIndex=-1; |
| 980 | } |
| 981 | |
| 982 | cnv->preFromULength=0; |
| 983 | } else { |
| 984 | /* see implementation note before _fromUnicodeWithCallback() */ |
| 985 | U_ASSERT(realSource==nullptr)(static_cast <bool> (realSource==nullptr) ? void (0) : __assert_fail ("realSource==nullptr", __builtin_FILE (), __builtin_LINE () , __extension__ __PRETTY_FUNCTION__)); |
| 986 | *err=U_INTERNAL_PROGRAM_ERROR; |
| 987 | } |
| 988 | } |
| 989 | |
| 990 | /* update pointers */ |
| 991 | s=pArgs->source; |
| 992 | t=pArgs->target; |
| 993 | |
| 994 | if(U_SUCCESS(*err)) { |
| 995 | if(s<pArgs->sourceLimit) { |
| 996 | /* |
| 997 | * continue with the conversion loop while there is still input left |
| 998 | * (continue converting by breaking out of only the inner loop) |
| 999 | */ |
| 1000 | break; |
| 1001 | } else if(realSource!=nullptr) { |
| 1002 | /* switch back from replaying to the real source and continue */ |
| 1003 | pArgs->source=realSource; |
| 1004 | pArgs->sourceLimit=realSourceLimit; |
| 1005 | pArgs->flush=realFlush; |
| 1006 | sourceIndex=realSourceIndex; |
| 1007 | |
| 1008 | realSource=nullptr; |
| 1009 | break; |
| 1010 | } else if(pArgs->flush && cnv->fromUChar32!=0) { |
| 1011 | /* |
| 1012 | * the entire input stream is consumed |
| 1013 | * and there is a partial, truncated input sequence left |
| 1014 | */ |
| 1015 | |
| 1016 | /* inject an error and continue with callback handling */ |
| 1017 | *err=U_TRUNCATED_CHAR_FOUND; |
| 1018 | calledCallback=false; /* new error condition */ |
| 1019 | } else { |
| 1020 | /* input consumed */ |
| 1021 | if(pArgs->flush) { |
| 1022 | /* |
| 1023 | * return to the conversion loop once more if the flush |
| 1024 | * flag is set and the conversion function has not |
| 1025 | * successfully processed the end of the input yet |
| 1026 | * |
| 1027 | * (continue converting by breaking out of only the inner loop) |
| 1028 | */ |
| 1029 | if(!converterSawEndOfInput) { |
| 1030 | break; |
| 1031 | } |
| 1032 | |
| 1033 | /* reset the converter without calling the callback function */ |
| 1034 | _reset(cnv, UCNV_RESET_FROM_UNICODE, false); |
| 1035 | } |
| 1036 | |
| 1037 | /* done successfully */ |
| 1038 | return; |
| 1039 | } |
| 1040 | } |
| 1041 | |
| 1042 | /* U_FAILURE(*err) */ |
| 1043 | { |
| 1044 | UErrorCode e; |
| 1045 | |
| 1046 | if( calledCallback || |
| 1047 | (e=*err)==U_BUFFER_OVERFLOW_ERROR || |
| 1048 | (e!=U_INVALID_CHAR_FOUND && |
| 1049 | e!=U_ILLEGAL_CHAR_FOUND && |
| 1050 | e!=U_TRUNCATED_CHAR_FOUND) |
| 1051 | ) { |
| 1052 | /* |
| 1053 | * the callback did not or cannot resolve the error: |
| 1054 | * set output pointers and return |
| 1055 | * |
| 1056 | * the check for buffer overflow is redundant but it is |
| 1057 | * a high-runner case and hopefully documents the intent |
| 1058 | * well |
| 1059 | * |
| 1060 | * if we were replaying, then the replay buffer must be |
| 1061 | * copied back into the UConverter |
| 1062 | * and the real arguments must be restored |
| 1063 | */ |
| 1064 | if(realSource!=nullptr) { |
| 1065 | int32_t length; |
| 1066 | |
| 1067 | U_ASSERT(cnv->preFromULength==0)(static_cast <bool> (cnv->preFromULength==0) ? void ( 0) : __assert_fail ("cnv->preFromULength==0", __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__)); |
| 1068 | |
| 1069 | length = static_cast<int32_t>(pArgs->sourceLimit - pArgs->source); |
| 1070 | if(length>0) { |
| 1071 | u_memcpy(cnv->preFromU, pArgs->source, length); |
| 1072 | cnv->preFromULength = static_cast<int8_t>(-length); |
| 1073 | } |
| 1074 | |
| 1075 | pArgs->source=realSource; |
| 1076 | pArgs->sourceLimit=realSourceLimit; |
| 1077 | pArgs->flush=realFlush; |
| 1078 | } |
| 1079 | |
| 1080 | return; |
| 1081 | } |
| 1082 | } |
| 1083 | |
| 1084 | /* callback handling */ |
| 1085 | { |
| 1086 | UChar32 codePoint; |
| 1087 | |
| 1088 | /* get and write the code point */ |
| 1089 | codePoint=cnv->fromUChar32; |
| 1090 | errorInputLength=0; |
| 1091 | U16_APPEND_UNSAFE(cnv->invalidUCharBuffer, errorInputLength, codePoint)do { if((uint32_t)(codePoint)<=0xffff) { (cnv->invalidUCharBuffer )[(errorInputLength)++]=(uint16_t)(codePoint); } else { (cnv-> invalidUCharBuffer)[(errorInputLength)++]=(uint16_t)(((codePoint )>>10)+0xd7c0); (cnv->invalidUCharBuffer)[(errorInputLength )++]=(uint16_t)(((codePoint)&0x3ff)|0xdc00); } } while (false ); |
| 1092 | cnv->invalidUCharLength = static_cast<int8_t>(errorInputLength); |
| 1093 | |
| 1094 | /* set the converter state to deal with the next character */ |
| 1095 | cnv->fromUChar32=0; |
| 1096 | |
| 1097 | /* call the callback function */ |
| 1098 | cnv->fromUCharErrorBehaviour(cnv->fromUContext, pArgs, |
| 1099 | cnv->invalidUCharBuffer, errorInputLength, codePoint, |
| 1100 | *err==U_INVALID_CHAR_FOUND ? UCNV_UNASSIGNED : UCNV_ILLEGAL, |
| 1101 | err); |
| 1102 | } |
| 1103 | |
| 1104 | /* |
| 1105 | * loop back to the offset handling |
| 1106 | * |
| 1107 | * this flag will indicate after offset handling |
| 1108 | * that a callback was called; |
| 1109 | * if the callback did not resolve the error, then we return |
| 1110 | */ |
| 1111 | calledCallback=true; |
| 1112 | } |
| 1113 | } |
| 1114 | } |
| 1115 | |
| 1116 | /* |
| 1117 | * Output the fromUnicode overflow buffer. |
| 1118 | * Call this function if(cnv->charErrorBufferLength>0). |
| 1119 | * @return true if overflow |
| 1120 | */ |
| 1121 | static UBool |
| 1122 | ucnv_outputOverflowFromUnicode(UConverter *cnv, |
| 1123 | char **target, const char *targetLimit, |
| 1124 | int32_t **pOffsets, |
| 1125 | UErrorCode *err) { |
| 1126 | int32_t *offsets; |
| 1127 | char *overflow, *t; |
| 1128 | int32_t i, length; |
| 1129 | |
| 1130 | t=*target; |
| 1131 | if(pOffsets!=nullptr) { |
| 1132 | offsets=*pOffsets; |
| 1133 | } else { |
| 1134 | offsets=nullptr; |
| 1135 | } |
| 1136 | |
| 1137 | overflow = reinterpret_cast<char*>(cnv->charErrorBuffer); |
| 1138 | length=cnv->charErrorBufferLength; |
| 1139 | i=0; |
| 1140 | while(i<length) { |
| 1141 | if(t==targetLimit) { |
| 1142 | /* the overflow buffer contains too much, keep the rest */ |
| 1143 | int32_t j=0; |
| 1144 | |
| 1145 | do { |
| 1146 | overflow[j++]=overflow[i++]; |
| 1147 | } while(i<length); |
| 1148 | |
| 1149 | cnv->charErrorBufferLength = static_cast<int8_t>(j); |
| 1150 | *target=t; |
| 1151 | if(offsets!=nullptr) { |
| 1152 | *pOffsets=offsets; |
| 1153 | } |
| 1154 | *err=U_BUFFER_OVERFLOW_ERROR; |
| 1155 | return true; |
| 1156 | } |
| 1157 | |
| 1158 | /* copy the overflow contents to the target */ |
| 1159 | *t++=overflow[i++]; |
| 1160 | if(offsets!=nullptr) { |
| 1161 | *offsets++=-1; /* no source index available for old output */ |
| 1162 | } |
| 1163 | } |
| 1164 | |
| 1165 | /* the overflow buffer is completely copied to the target */ |
| 1166 | cnv->charErrorBufferLength=0; |
| 1167 | *target=t; |
| 1168 | if(offsets!=nullptr) { |
| 1169 | *pOffsets=offsets; |
| 1170 | } |
| 1171 | return false; |
| 1172 | } |
| 1173 | |
| 1174 | U_CAPIextern "C" void U_EXPORT2 |
| 1175 | ucnv_fromUnicode(UConverter *cnv, |
| 1176 | char **target, const char *targetLimit, |
| 1177 | const char16_t **source, const char16_t *sourceLimit, |
| 1178 | int32_t *offsets, |
| 1179 | UBool flush, |
| 1180 | UErrorCode *err) { |
| 1181 | UConverterFromUnicodeArgs args; |
| 1182 | const char16_t *s; |
| 1183 | char *t; |
| 1184 | |
| 1185 | /* check parameters */ |
| 1186 | if(err==nullptr || U_FAILURE(*err)) { |
| 1187 | return; |
| 1188 | } |
| 1189 | |
| 1190 | if(cnv==nullptr || target==nullptr || source==nullptr) { |
| 1191 | *err=U_ILLEGAL_ARGUMENT_ERROR; |
| 1192 | return; |
| 1193 | } |
| 1194 | |
| 1195 | s=*source; |
| 1196 | t=*target; |
| 1197 | |
| 1198 | if ((const void *)U_MAX_PTR(sourceLimit)((void *)(((uintptr_t)(sourceLimit)+0x7fffffffu) > (uintptr_t )(sourceLimit) ? ((uintptr_t)(sourceLimit)+0x7fffffffu) : (uintptr_t )-1)) == (const void *)sourceLimit) { |
| 1199 | /* |
| 1200 | Prevent code from going into an infinite loop in case we do hit this |
| 1201 | limit. The limit pointer is expected to be on a char16_t * boundary. |
| 1202 | This also prevents the next argument check from failing. |
| 1203 | */ |
| 1204 | sourceLimit = (const char16_t *)(((const char *)sourceLimit) - 1); |
| 1205 | } |
| 1206 | |
| 1207 | /* |
| 1208 | * All these conditions should never happen. |
| 1209 | * |
| 1210 | * 1) Make sure that the limits are >= to the address source or target |
| 1211 | * |
| 1212 | * 2) Make sure that the buffer sizes do not exceed the number range for |
| 1213 | * int32_t because some functions use the size (in units or bytes) |
| 1214 | * rather than comparing pointers, and because offsets are int32_t values. |
| 1215 | * |
| 1216 | * size_t is guaranteed to be unsigned and large enough for the job. |
| 1217 | * |
| 1218 | * Return with an error instead of adjusting the limits because we would |
| 1219 | * not be able to maintain the semantics that either the source must be |
| 1220 | * consumed or the target filled (unless an error occurs). |
| 1221 | * An adjustment would be targetLimit=t+0x7fffffff; for example. |
| 1222 | * |
| 1223 | * 3) Make sure that the user didn't incorrectly cast a char16_t * pointer |
| 1224 | * to a char * pointer and provide an incomplete char16_t code unit. |
| 1225 | */ |
| 1226 | if (sourceLimit<s || targetLimit<t || |
| 1227 | ((size_t)(sourceLimit-s)>(size_t)0x3fffffff && sourceLimit>s) || |
| 1228 | ((size_t)(targetLimit-t)>(size_t)0x7fffffff && targetLimit>t) || |
| 1229 | (((const char *)sourceLimit-(const char *)s) & 1) != 0) |
| 1230 | { |
| 1231 | *err=U_ILLEGAL_ARGUMENT_ERROR; |
| 1232 | return; |
| 1233 | } |
| 1234 | |
| 1235 | /* output the target overflow buffer */ |
| 1236 | if( cnv->charErrorBufferLength>0 && |
| 1237 | ucnv_outputOverflowFromUnicode(cnv, target, targetLimit, &offsets, err) |
| 1238 | ) { |
| 1239 | /* U_BUFFER_OVERFLOW_ERROR */ |
| 1240 | return; |
| 1241 | } |
| 1242 | /* *target may have moved, therefore stop using t */ |
| 1243 | |
| 1244 | if(!flush && s==sourceLimit && cnv->preFromULength>=0) { |
| 1245 | /* the overflow buffer is emptied and there is no new input: we are done */ |
| 1246 | return; |
| 1247 | } |
| 1248 | |
| 1249 | /* |
| 1250 | * Do not simply return with a buffer overflow error if |
| 1251 | * !flush && t==targetLimit |
| 1252 | * because it is possible that the source will not generate any output. |
| 1253 | * For example, the skip callback may be called; |
| 1254 | * it does not output anything. |
| 1255 | */ |
| 1256 | |
| 1257 | /* prepare the converter arguments */ |
| 1258 | args.converter=cnv; |
| 1259 | args.flush=flush; |
| 1260 | args.offsets=offsets; |
| 1261 | args.source=s; |
| 1262 | args.sourceLimit=sourceLimit; |
| 1263 | args.target=*target; |
| 1264 | args.targetLimit=targetLimit; |
| 1265 | args.size=sizeof(args); |
| 1266 | |
| 1267 | _fromUnicodeWithCallback(&args, err); |
| 1268 | |
| 1269 | *source=args.source; |
| 1270 | *target=args.target; |
| 1271 | } |
| 1272 | |
| 1273 | /* ucnv_toUnicode() --------------------------------------------------------- */ |
| 1274 | |
| 1275 | static void |
| 1276 | _toUnicodeWithCallback(UConverterToUnicodeArgs *pArgs, UErrorCode *err) { |
| 1277 | UConverterToUnicode toUnicode; |
| 1278 | UConverter *cnv; |
| 1279 | const char *s; |
| 1280 | char16_t *t; |
| 1281 | int32_t *offsets; |
| 1282 | int32_t sourceIndex; |
| 1283 | int32_t errorInputLength; |
| 1284 | UBool converterSawEndOfInput, calledCallback; |
| 1285 | |
| 1286 | /* variables for m:n conversion */ |
| 1287 | char replay[UCNV_EXT_MAX_BYTES0x1f]; |
| 1288 | const char *realSource, *realSourceLimit; |
| 1289 | int32_t realSourceIndex; |
| 1290 | UBool realFlush; |
| 1291 | |
| 1292 | cnv=pArgs->converter; |
| 1293 | s=pArgs->source; |
| 1294 | t=pArgs->target; |
| 1295 | offsets=pArgs->offsets; |
| 1296 | |
| 1297 | /* get the converter implementation function */ |
| 1298 | sourceIndex=0; |
| 1299 | if(offsets==nullptr) { |
| 1300 | toUnicode=cnv->sharedData->impl->toUnicode; |
| 1301 | } else { |
| 1302 | toUnicode=cnv->sharedData->impl->toUnicodeWithOffsets; |
| 1303 | if(toUnicode==nullptr) { |
| 1304 | /* there is no WithOffsets implementation */ |
| 1305 | toUnicode=cnv->sharedData->impl->toUnicode; |
| 1306 | /* we will write -1 for each offset */ |
| 1307 | sourceIndex=-1; |
| 1308 | } |
| 1309 | } |
| 1310 | |
| 1311 | if(cnv->preToULength>=0) { |
| 1312 | /* normal mode */ |
| 1313 | realSource=nullptr; |
| 1314 | |
| 1315 | /* avoid compiler warnings - not otherwise necessary, and the values do not matter */ |
| 1316 | realSourceLimit=nullptr; |
| 1317 | realFlush=false; |
| 1318 | realSourceIndex=0; |
| 1319 | } else { |
| 1320 | /* |
| 1321 | * Previous m:n conversion stored source units from a partial match |
| 1322 | * and failed to consume all of them. |
| 1323 | * We need to "replay" them from a temporary buffer and convert them first. |
| 1324 | */ |
| 1325 | realSource=pArgs->source; |
| 1326 | realSourceLimit=pArgs->sourceLimit; |
| 1327 | realFlush=pArgs->flush; |
| 1328 | realSourceIndex=sourceIndex; |
| 1329 | |
| 1330 | uprv_memcpy(replay, cnv->preToU, -cnv->preToULength)do { clang diagnostic push
clang diagnostic ignored "-Waddress" (static_cast <bool> (replay != __null) ? void (0) : __assert_fail ("replay != __null", __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__)); (static_cast <bool> (cnv->preToU != __null) ? void (0) : __assert_fail ("cnv->preToU != __null" , __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__ )); clang diagnostic pop :: memcpy(replay, cnv->preToU, - cnv->preToULength); } while (false); |
| 1331 | pArgs->source=replay; |
| 1332 | pArgs->sourceLimit=replay-cnv->preToULength; |
| 1333 | pArgs->flush=false; |
| 1334 | sourceIndex=-1; |
| 1335 | |
| 1336 | cnv->preToULength=0; |
| 1337 | } |
| 1338 | |
| 1339 | /* |
| 1340 | * loop for conversion and error handling |
| 1341 | * |
| 1342 | * loop { |
| 1343 | * convert |
| 1344 | * loop { |
| 1345 | * update offsets |
| 1346 | * handle end of input |
| 1347 | * handle errors/call callback |
| 1348 | * } |
| 1349 | * } |
| 1350 | */ |
| 1351 | for(;;) { |
| 1352 | if(U_SUCCESS(*err)) { |
| 1353 | /* convert */ |
| 1354 | toUnicode(pArgs, err); |
| 1355 | |
| 1356 | /* |
| 1357 | * set a flag for whether the converter |
| 1358 | * successfully processed the end of the input |
| 1359 | * |
| 1360 | * need not check cnv->preToULength==0 because a replay (<0) will cause |
| 1361 | * s<sourceLimit before converterSawEndOfInput is checked |
| 1362 | */ |
| 1363 | converterSawEndOfInput= |
| 1364 | static_cast<UBool>(U_SUCCESS(*err) && |
| 1365 | pArgs->flush && pArgs->source==pArgs->sourceLimit && |
| 1366 | cnv->toULength==0); |
| 1367 | } else { |
| 1368 | /* handle error from getNextUChar() or ucnv_convertEx() */ |
| 1369 | converterSawEndOfInput=false; |
| 1370 | } |
| 1371 | |
| 1372 | /* no callback called yet for this iteration */ |
| 1373 | calledCallback=false; |
| 1374 | |
| 1375 | /* no sourceIndex adjustment for conversion, only for callback output */ |
| 1376 | errorInputLength=0; |
| 1377 | |
| 1378 | /* |
| 1379 | * loop for offsets and error handling |
| 1380 | * |
| 1381 | * iterates at most 3 times: |
| 1382 | * 1. to clean up after the conversion function |
| 1383 | * 2. after the callback |
| 1384 | * 3. after the callback again if there was truncated input |
| 1385 | */ |
| 1386 | for(;;) { |
| 1387 | /* update offsets if we write any */ |
| 1388 | if(offsets!=nullptr) { |
| 1389 | int32_t length = static_cast<int32_t>(pArgs->target - t); |
| 1390 | if(length>0) { |
| 1391 | _updateOffsets(offsets, length, sourceIndex, errorInputLength); |
| 1392 | |
| 1393 | /* |
| 1394 | * if a converter handles offsets and updates the offsets |
| 1395 | * pointer at the end, then pArgs->offset should not change |
| 1396 | * here; |
| 1397 | * however, some converters do not handle offsets at all |
| 1398 | * (sourceIndex<0) or may not update the offsets pointer |
| 1399 | */ |
| 1400 | pArgs->offsets=offsets+=length; |
| 1401 | } |
| 1402 | |
| 1403 | if(sourceIndex>=0) { |
| 1404 | sourceIndex += static_cast<int32_t>(pArgs->source - s); |
| 1405 | } |
| 1406 | } |
| 1407 | |
| 1408 | if(cnv->preToULength<0) { |
| 1409 | /* |
| 1410 | * switch the source to new replay units (cannot occur while replaying) |
| 1411 | * after offset handling and before end-of-input and callback handling |
| 1412 | */ |
| 1413 | if(realSource==nullptr) { |
| 1414 | realSource=pArgs->source; |
| 1415 | realSourceLimit=pArgs->sourceLimit; |
| 1416 | realFlush=pArgs->flush; |
| 1417 | realSourceIndex=sourceIndex; |
| 1418 | |
| 1419 | uprv_memcpy(replay, cnv->preToU, -cnv->preToULength)do { clang diagnostic push
clang diagnostic ignored "-Waddress" (static_cast <bool> (replay != __null) ? void (0) : __assert_fail ("replay != __null", __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__)); (static_cast <bool> (cnv->preToU != __null) ? void (0) : __assert_fail ("cnv->preToU != __null" , __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__ )); clang diagnostic pop :: memcpy(replay, cnv->preToU, - cnv->preToULength); } while (false); |
| 1420 | pArgs->source=replay; |
| 1421 | pArgs->sourceLimit=replay-cnv->preToULength; |
| 1422 | pArgs->flush=false; |
| 1423 | if((sourceIndex+=cnv->preToULength)<0) { |
| 1424 | sourceIndex=-1; |
| 1425 | } |
| 1426 | |
| 1427 | cnv->preToULength=0; |
| 1428 | } else { |
| 1429 | /* see implementation note before _fromUnicodeWithCallback() */ |
| 1430 | U_ASSERT(realSource==nullptr)(static_cast <bool> (realSource==nullptr) ? void (0) : __assert_fail ("realSource==nullptr", __builtin_FILE (), __builtin_LINE () , __extension__ __PRETTY_FUNCTION__)); |
| 1431 | *err=U_INTERNAL_PROGRAM_ERROR; |
| 1432 | } |
| 1433 | } |
| 1434 | |
| 1435 | /* update pointers */ |
| 1436 | s=pArgs->source; |
| 1437 | t=pArgs->target; |
| 1438 | |
| 1439 | if(U_SUCCESS(*err)) { |
| 1440 | if(s<pArgs->sourceLimit) { |
| 1441 | /* |
| 1442 | * continue with the conversion loop while there is still input left |
| 1443 | * (continue converting by breaking out of only the inner loop) |
| 1444 | */ |
| 1445 | break; |
| 1446 | } else if(realSource!=nullptr) { |
| 1447 | /* switch back from replaying to the real source and continue */ |
| 1448 | pArgs->source=realSource; |
| 1449 | pArgs->sourceLimit=realSourceLimit; |
| 1450 | pArgs->flush=realFlush; |
| 1451 | sourceIndex=realSourceIndex; |
| 1452 | |
| 1453 | realSource=nullptr; |
| 1454 | break; |
| 1455 | } else if(pArgs->flush && cnv->toULength>0) { |
| 1456 | /* |
| 1457 | * the entire input stream is consumed |
| 1458 | * and there is a partial, truncated input sequence left |
| 1459 | */ |
| 1460 | |
| 1461 | /* inject an error and continue with callback handling */ |
| 1462 | *err=U_TRUNCATED_CHAR_FOUND; |
| 1463 | calledCallback=false; /* new error condition */ |
| 1464 | } else { |
| 1465 | /* input consumed */ |
| 1466 | if(pArgs->flush) { |
| 1467 | /* |
| 1468 | * return to the conversion loop once more if the flush |
| 1469 | * flag is set and the conversion function has not |
| 1470 | * successfully processed the end of the input yet |
| 1471 | * |
| 1472 | * (continue converting by breaking out of only the inner loop) |
| 1473 | */ |
| 1474 | if(!converterSawEndOfInput) { |
| 1475 | break; |
| 1476 | } |
| 1477 | |
| 1478 | /* reset the converter without calling the callback function */ |
| 1479 | _reset(cnv, UCNV_RESET_TO_UNICODE, false); |
| 1480 | } |
| 1481 | |
| 1482 | /* done successfully */ |
| 1483 | return; |
| 1484 | } |
| 1485 | } |
| 1486 | |
| 1487 | /* U_FAILURE(*err) */ |
| 1488 | { |
| 1489 | UErrorCode e; |
| 1490 | |
| 1491 | if( calledCallback || |
| 1492 | (e=*err)==U_BUFFER_OVERFLOW_ERROR || |
| 1493 | (e!=U_INVALID_CHAR_FOUND && |
| 1494 | e!=U_ILLEGAL_CHAR_FOUND && |
| 1495 | e!=U_TRUNCATED_CHAR_FOUND && |
| 1496 | e!=U_ILLEGAL_ESCAPE_SEQUENCE && |
| 1497 | e!=U_UNSUPPORTED_ESCAPE_SEQUENCE) |
| 1498 | ) { |
| 1499 | /* |
| 1500 | * the callback did not or cannot resolve the error: |
| 1501 | * set output pointers and return |
| 1502 | * |
| 1503 | * the check for buffer overflow is redundant but it is |
| 1504 | * a high-runner case and hopefully documents the intent |
| 1505 | * well |
| 1506 | * |
| 1507 | * if we were replaying, then the replay buffer must be |
| 1508 | * copied back into the UConverter |
| 1509 | * and the real arguments must be restored |
| 1510 | */ |
| 1511 | if(realSource!=nullptr) { |
| 1512 | int32_t length; |
| 1513 | |
| 1514 | U_ASSERT(cnv->preToULength==0)(static_cast <bool> (cnv->preToULength==0) ? void (0 ) : __assert_fail ("cnv->preToULength==0", __builtin_FILE ( ), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__)); |
| 1515 | |
| 1516 | length = static_cast<int32_t>(pArgs->sourceLimit - pArgs->source); |
| 1517 | if(length>0) { |
| 1518 | uprv_memcpy(cnv->preToU, pArgs->source, length)do { clang diagnostic push
clang diagnostic ignored "-Waddress" (static_cast <bool> (cnv->preToU != __null) ? void (0) : __assert_fail ("cnv->preToU != __null", __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__)); ( static_cast <bool> (pArgs->source != __null) ? void ( 0) : __assert_fail ("pArgs->source != __null", __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__)); clang diagnostic pop :: memcpy(cnv->preToU, pArgs->source, length ); } while (false); |
| 1519 | cnv->preToULength = static_cast<int8_t>(-length); |
| 1520 | } |
| 1521 | |
| 1522 | pArgs->source=realSource; |
| 1523 | pArgs->sourceLimit=realSourceLimit; |
| 1524 | pArgs->flush=realFlush; |
| 1525 | } |
| 1526 | |
| 1527 | return; |
| 1528 | } |
| 1529 | } |
| 1530 | |
| 1531 | /* copy toUBytes[] to invalidCharBuffer[] */ |
| 1532 | errorInputLength=cnv->invalidCharLength=cnv->toULength; |
| 1533 | if(errorInputLength>0) { |
| 1534 | uprv_memcpy(cnv->invalidCharBuffer, cnv->toUBytes, errorInputLength)do { clang diagnostic push
clang diagnostic ignored "-Waddress" (static_cast <bool> (cnv->invalidCharBuffer != __null ) ? void (0) : __assert_fail ("cnv->invalidCharBuffer != __null" , __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__ )); (static_cast <bool> (cnv->toUBytes != __null) ? void (0) : __assert_fail ("cnv->toUBytes != __null", __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__)); clang diagnostic pop :: memcpy(cnv->invalidCharBuffer, cnv-> toUBytes, errorInputLength); } while (false); |
| 1535 | } |
| 1536 | |
| 1537 | /* set the converter state to deal with the next character */ |
| 1538 | cnv->toULength=0; |
| 1539 | |
| 1540 | /* call the callback function */ |
| 1541 | if(cnv->toUCallbackReason==UCNV_ILLEGAL && *err==U_INVALID_CHAR_FOUND) { |
| 1542 | cnv->toUCallbackReason = UCNV_UNASSIGNED; |
| 1543 | } |
| 1544 | cnv->fromCharErrorBehaviour(cnv->toUContext, pArgs, |
| 1545 | cnv->invalidCharBuffer, errorInputLength, |
| 1546 | cnv->toUCallbackReason, |
| 1547 | err); |
| 1548 | cnv->toUCallbackReason = UCNV_ILLEGAL; /* reset to default value */ |
| 1549 | |
| 1550 | /* |
| 1551 | * loop back to the offset handling |
| 1552 | * |
| 1553 | * this flag will indicate after offset handling |
| 1554 | * that a callback was called; |
| 1555 | * if the callback did not resolve the error, then we return |
| 1556 | */ |
| 1557 | calledCallback=true; |
| 1558 | } |
| 1559 | } |
| 1560 | } |
| 1561 | |
| 1562 | /* |
| 1563 | * Output the toUnicode overflow buffer. |
| 1564 | * Call this function if(cnv->UCharErrorBufferLength>0). |
| 1565 | * @return true if overflow |
| 1566 | */ |
| 1567 | static UBool |
| 1568 | ucnv_outputOverflowToUnicode(UConverter *cnv, |
| 1569 | char16_t **target, const char16_t *targetLimit, |
| 1570 | int32_t **pOffsets, |
| 1571 | UErrorCode *err) { |
| 1572 | int32_t *offsets; |
| 1573 | char16_t *overflow, *t; |
| 1574 | int32_t i, length; |
| 1575 | |
| 1576 | t=*target; |
| 1577 | if(pOffsets!=nullptr) { |
| 1578 | offsets=*pOffsets; |
| 1579 | } else { |
| 1580 | offsets=nullptr; |
| 1581 | } |
| 1582 | |
| 1583 | overflow=cnv->UCharErrorBuffer; |
| 1584 | length=cnv->UCharErrorBufferLength; |
| 1585 | i=0; |
| 1586 | while(i<length) { |
| 1587 | if(t==targetLimit) { |
| 1588 | /* the overflow buffer contains too much, keep the rest */ |
| 1589 | int32_t j=0; |
| 1590 | |
| 1591 | do { |
| 1592 | overflow[j++]=overflow[i++]; |
| 1593 | } while(i<length); |
| 1594 | |
| 1595 | cnv->UCharErrorBufferLength = static_cast<int8_t>(j); |
| 1596 | *target=t; |
| 1597 | if(offsets!=nullptr) { |
| 1598 | *pOffsets=offsets; |
| 1599 | } |
| 1600 | *err=U_BUFFER_OVERFLOW_ERROR; |
| 1601 | return true; |
| 1602 | } |
| 1603 | |
| 1604 | /* copy the overflow contents to the target */ |
| 1605 | *t++=overflow[i++]; |
| 1606 | if(offsets!=nullptr) { |
| 1607 | *offsets++=-1; /* no source index available for old output */ |
| 1608 | } |
| 1609 | } |
| 1610 | |
| 1611 | /* the overflow buffer is completely copied to the target */ |
| 1612 | cnv->UCharErrorBufferLength=0; |
| 1613 | *target=t; |
| 1614 | if(offsets!=nullptr) { |
| 1615 | *pOffsets=offsets; |
| 1616 | } |
| 1617 | return false; |
| 1618 | } |
| 1619 | |
| 1620 | U_CAPIextern "C" void U_EXPORT2 |
| 1621 | ucnv_toUnicode(UConverter *cnv, |
| 1622 | char16_t **target, const char16_t *targetLimit, |
| 1623 | const char **source, const char *sourceLimit, |
| 1624 | int32_t *offsets, |
| 1625 | UBool flush, |
| 1626 | UErrorCode *err) { |
| 1627 | UConverterToUnicodeArgs args; |
| 1628 | const char *s; |
| 1629 | char16_t *t; |
| 1630 | |
| 1631 | /* check parameters */ |
| 1632 | if(err==nullptr || U_FAILURE(*err)) { |
| 1633 | return; |
| 1634 | } |
| 1635 | |
| 1636 | if(cnv==nullptr || target==nullptr || source==nullptr) { |
| 1637 | *err=U_ILLEGAL_ARGUMENT_ERROR; |
| 1638 | return; |
| 1639 | } |
| 1640 | |
| 1641 | s=*source; |
| 1642 | t=*target; |
| 1643 | |
| 1644 | if ((const void *)U_MAX_PTR(targetLimit)((void *)(((uintptr_t)(targetLimit)+0x7fffffffu) > (uintptr_t )(targetLimit) ? ((uintptr_t)(targetLimit)+0x7fffffffu) : (uintptr_t )-1)) == (const void *)targetLimit) { |
| 1645 | /* |
| 1646 | Prevent code from going into an infinite loop in case we do hit this |
| 1647 | limit. The limit pointer is expected to be on a char16_t * boundary. |
| 1648 | This also prevents the next argument check from failing. |
| 1649 | */ |
| 1650 | targetLimit = (const char16_t *)(((const char *)targetLimit) - 1); |
| 1651 | } |
| 1652 | |
| 1653 | /* |
| 1654 | * All these conditions should never happen. |
| 1655 | * |
| 1656 | * 1) Make sure that the limits are >= to the address source or target |
| 1657 | * |
| 1658 | * 2) Make sure that the buffer sizes do not exceed the number range for |
| 1659 | * int32_t because some functions use the size (in units or bytes) |
| 1660 | * rather than comparing pointers, and because offsets are int32_t values. |
| 1661 | * |
| 1662 | * size_t is guaranteed to be unsigned and large enough for the job. |
| 1663 | * |
| 1664 | * Return with an error instead of adjusting the limits because we would |
| 1665 | * not be able to maintain the semantics that either the source must be |
| 1666 | * consumed or the target filled (unless an error occurs). |
| 1667 | * An adjustment would be sourceLimit=t+0x7fffffff; for example. |
| 1668 | * |
| 1669 | * 3) Make sure that the user didn't incorrectly cast a char16_t * pointer |
| 1670 | * to a char * pointer and provide an incomplete char16_t code unit. |
| 1671 | */ |
| 1672 | if (sourceLimit<s || targetLimit<t || |
| 1673 | ((size_t)(sourceLimit-s)>(size_t)0x7fffffff && sourceLimit>s) || |
| 1674 | ((size_t)(targetLimit-t)>(size_t)0x3fffffff && targetLimit>t) || |
| 1675 | (((const char *)targetLimit-(const char *)t) & 1) != 0 |
| 1676 | ) { |
| 1677 | *err=U_ILLEGAL_ARGUMENT_ERROR; |
| 1678 | return; |
| 1679 | } |
| 1680 | |
| 1681 | /* output the target overflow buffer */ |
| 1682 | if( cnv->UCharErrorBufferLength>0 && |
| 1683 | ucnv_outputOverflowToUnicode(cnv, target, targetLimit, &offsets, err) |
| 1684 | ) { |
| 1685 | /* U_BUFFER_OVERFLOW_ERROR */ |
| 1686 | return; |
| 1687 | } |
| 1688 | /* *target may have moved, therefore stop using t */ |
| 1689 | |
| 1690 | if(!flush && s==sourceLimit && cnv->preToULength>=0) { |
| 1691 | /* the overflow buffer is emptied and there is no new input: we are done */ |
| 1692 | return; |
| 1693 | } |
| 1694 | |
| 1695 | /* |
| 1696 | * Do not simply return with a buffer overflow error if |
| 1697 | * !flush && t==targetLimit |
| 1698 | * because it is possible that the source will not generate any output. |
| 1699 | * For example, the skip callback may be called; |
| 1700 | * it does not output anything. |
| 1701 | */ |
| 1702 | |
| 1703 | /* prepare the converter arguments */ |
| 1704 | args.converter=cnv; |
| 1705 | args.flush=flush; |
| 1706 | args.offsets=offsets; |
| 1707 | args.source=s; |
| 1708 | args.sourceLimit=sourceLimit; |
| 1709 | args.target=*target; |
| 1710 | args.targetLimit=targetLimit; |
| 1711 | args.size=sizeof(args); |
| 1712 | |
| 1713 | _toUnicodeWithCallback(&args, err); |
| 1714 | |
| 1715 | *source=args.source; |
| 1716 | *target=args.target; |
| 1717 | } |
| 1718 | |
| 1719 | /* ucnv_to/fromUChars() ----------------------------------------------------- */ |
| 1720 | |
| 1721 | U_CAPIextern "C" int32_t U_EXPORT2 |
| 1722 | ucnv_fromUChars(UConverter *cnv, |
| 1723 | char *dest, int32_t destCapacity, |
| 1724 | const char16_t *src, int32_t srcLength, |
| 1725 | UErrorCode *pErrorCode) { |
| 1726 | const char16_t *srcLimit; |
| 1727 | char *originalDest, *destLimit; |
| 1728 | int32_t destLength; |
| 1729 | |
| 1730 | /* check arguments */ |
| 1731 | if(pErrorCode==nullptr || U_FAILURE(*pErrorCode)) { |
| 1732 | return 0; |
| 1733 | } |
| 1734 | |
| 1735 | if( cnv==nullptr || |
| 1736 | destCapacity<0 || (destCapacity>0 && dest==nullptr) || |
| 1737 | srcLength<-1 || (srcLength!=0 && src==nullptr) |
| 1738 | ) { |
| 1739 | *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| 1740 | return 0; |
| 1741 | } |
| 1742 | |
| 1743 | /* initialize */ |
| 1744 | ucnv_resetFromUnicode(cnv); |
| 1745 | originalDest=dest; |
| 1746 | if(srcLength==-1) { |
| 1747 | srcLength=u_strlen(src); |
| 1748 | } |
| 1749 | if(srcLength>0) { |
| 1750 | srcLimit=src+srcLength; |
| 1751 | destCapacity=pinCapacity(dest, destCapacity); |
| 1752 | destLimit=dest+destCapacity; |
| 1753 | |
| 1754 | /* perform the conversion */ |
| 1755 | UErrorCode bufferStatus = U_ZERO_ERROR; |
| 1756 | ucnv_fromUnicode(cnv, &dest, destLimit, &src, srcLimit, nullptr, true, &bufferStatus); |
| 1757 | destLength=(int32_t)(dest-originalDest); |
| 1758 | |
| 1759 | /* if an overflow occurs, then get the preflighting length */ |
| 1760 | if(bufferStatus==U_BUFFER_OVERFLOW_ERROR) { |
| 1761 | char buffer[1024]; |
| 1762 | |
| 1763 | destLimit=buffer+sizeof(buffer); |
| 1764 | do { |
| 1765 | dest=buffer; |
| 1766 | bufferStatus=U_ZERO_ERROR; |
| 1767 | ucnv_fromUnicode(cnv, &dest, destLimit, &src, srcLimit, nullptr, true, &bufferStatus); |
| 1768 | destLength+=(int32_t)(dest-buffer); |
| 1769 | } while(bufferStatus==U_BUFFER_OVERFLOW_ERROR); |
| 1770 | } |
| 1771 | if (U_FAILURE(bufferStatus)) { |
| 1772 | *pErrorCode = bufferStatus; |
| 1773 | } |
| 1774 | } else { |
| 1775 | destLength=0; |
| 1776 | } |
| 1777 | |
| 1778 | return u_terminateChars(originalDest, destCapacity, destLength, pErrorCode); |
| 1779 | } |
| 1780 | |
| 1781 | U_CAPIextern "C" int32_t U_EXPORT2 |
| 1782 | ucnv_toUChars(UConverter *cnv, |
| 1783 | char16_t *dest, int32_t destCapacity, |
| 1784 | const char *src, int32_t srcLength, |
| 1785 | UErrorCode *pErrorCode) { |
| 1786 | const char *srcLimit; |
| 1787 | char16_t *originalDest, *destLimit; |
| 1788 | int32_t destLength; |
| 1789 | |
| 1790 | /* check arguments */ |
| 1791 | if(pErrorCode==nullptr || U_FAILURE(*pErrorCode)) { |
| 1792 | return 0; |
| 1793 | } |
| 1794 | |
| 1795 | if( cnv==nullptr || |
| 1796 | destCapacity<0 || (destCapacity>0 && dest==nullptr) || |
| 1797 | srcLength<-1 || (srcLength!=0 && src==nullptr)) |
| 1798 | { |
| 1799 | *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| 1800 | return 0; |
| 1801 | } |
| 1802 | |
| 1803 | /* initialize */ |
| 1804 | ucnv_resetToUnicode(cnv); |
| 1805 | originalDest=dest; |
| 1806 | if(srcLength==-1) { |
| 1807 | srcLength=(int32_t)uprv_strlen(src):: strlen(src); |
| 1808 | } |
| 1809 | if(srcLength>0) { |
| 1810 | srcLimit=src+srcLength; |
| 1811 | destCapacity=pinCapacity(dest, destCapacity); |
| 1812 | destLimit=dest+destCapacity; |
| 1813 | |
| 1814 | /* perform the conversion */ |
| 1815 | UErrorCode bufferStatus = U_ZERO_ERROR; |
| 1816 | ucnv_toUnicode(cnv, &dest, destLimit, &src, srcLimit, nullptr, true, &bufferStatus); |
| 1817 | destLength=(int32_t)(dest-originalDest); |
| 1818 | |
| 1819 | /* if an overflow occurs, then get the preflighting length */ |
| 1820 | if(bufferStatus==U_BUFFER_OVERFLOW_ERROR) |
| 1821 | { |
| 1822 | char16_t buffer[1024]; |
| 1823 | |
| 1824 | destLimit=buffer+UPRV_LENGTHOF(buffer)(int32_t)(sizeof(buffer)/sizeof((buffer)[0])); |
| 1825 | do { |
| 1826 | dest=buffer; |
| 1827 | bufferStatus=U_ZERO_ERROR; |
| 1828 | ucnv_toUnicode(cnv, &dest, destLimit, &src, srcLimit, nullptr, true, &bufferStatus); |
| 1829 | destLength+=(int32_t)(dest-buffer); |
| 1830 | } |
| 1831 | while(bufferStatus==U_BUFFER_OVERFLOW_ERROR); |
| 1832 | } |
| 1833 | if (U_FAILURE(bufferStatus)) { |
| 1834 | *pErrorCode = bufferStatus; |
| 1835 | } |
| 1836 | } else { |
| 1837 | destLength=0; |
| 1838 | } |
| 1839 | |
| 1840 | return u_terminateUChars(originalDest, destCapacity, destLength, pErrorCode); |
| 1841 | } |
| 1842 | |
| 1843 | /* ucnv_getNextUChar() ------------------------------------------------------ */ |
| 1844 | |
| 1845 | U_CAPIextern "C" UChar32 U_EXPORT2 |
| 1846 | ucnv_getNextUChar(UConverter *cnv, |
| 1847 | const char **source, const char *sourceLimit, |
| 1848 | UErrorCode *err) { |
| 1849 | UConverterToUnicodeArgs args; |
| 1850 | char16_t buffer[U16_MAX_LENGTH2]; |
| 1851 | const char *s; |
| 1852 | UChar32 c; |
| 1853 | int32_t i, length; |
| 1854 | |
| 1855 | /* check parameters */ |
| 1856 | if(err==nullptr || U_FAILURE(*err)) { |
| 1857 | return 0xffff; |
| 1858 | } |
| 1859 | |
| 1860 | if(cnv==nullptr || source==nullptr) { |
| 1861 | *err=U_ILLEGAL_ARGUMENT_ERROR; |
| 1862 | return 0xffff; |
| 1863 | } |
| 1864 | |
| 1865 | s=*source; |
| 1866 | if(sourceLimit<s) { |
| 1867 | *err=U_ILLEGAL_ARGUMENT_ERROR; |
| 1868 | return 0xffff; |
| 1869 | } |
| 1870 | |
| 1871 | /* |
| 1872 | * Make sure that the buffer sizes do not exceed the number range for |
| 1873 | * int32_t because some functions use the size (in units or bytes) |
| 1874 | * rather than comparing pointers, and because offsets are int32_t values. |
| 1875 | * |
| 1876 | * size_t is guaranteed to be unsigned and large enough for the job. |
| 1877 | * |
| 1878 | * Return with an error instead of adjusting the limits because we would |
| 1879 | * not be able to maintain the semantics that either the source must be |
| 1880 | * consumed or the target filled (unless an error occurs). |
| 1881 | * An adjustment would be sourceLimit=t+0x7fffffff; for example. |
| 1882 | */ |
| 1883 | if(((size_t)(sourceLimit-s)>(size_t)0x7fffffff && sourceLimit>s)) { |
| 1884 | *err=U_ILLEGAL_ARGUMENT_ERROR; |
| 1885 | return 0xffff; |
| 1886 | } |
| 1887 | |
| 1888 | c=U_SENTINEL(-1); |
| 1889 | |
| 1890 | /* flush the target overflow buffer */ |
| 1891 | if(cnv->UCharErrorBufferLength>0) { |
| 1892 | char16_t *overflow; |
| 1893 | |
| 1894 | overflow=cnv->UCharErrorBuffer; |
| 1895 | i=0; |
| 1896 | length=cnv->UCharErrorBufferLength; |
| 1897 | U16_NEXT(overflow, i, length, c)do { (c)=(overflow)[(i)++]; if((((c)&0xfffffc00)==0xd800) ) { uint16_t __c2; if((i)!=(length) && (((__c2=(overflow )[(i)])&0xfffffc00)==0xdc00)) { ++(i); (c)=(((UChar32)((c ))<<10UL)+(UChar32)(__c2)-((0xd800<<10UL)+0xdc00- 0x10000)); } } } while (false); |
| 1898 | |
| 1899 | /* move the remaining overflow contents up to the beginning */ |
| 1900 | if((cnv->UCharErrorBufferLength=(int8_t)(length-i))>0) { |
| 1901 | uprv_memmove(cnv->UCharErrorBuffer, cnv->UCharErrorBuffer+i,do { clang diagnostic push
clang diagnostic ignored "-Waddress" (static_cast <bool> (cnv->UCharErrorBuffer != __null ) ? void (0) : __assert_fail ("cnv->UCharErrorBuffer != __null" , __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__ )); (static_cast <bool> (cnv->UCharErrorBuffer+i != __null ) ? void (0) : __assert_fail ("cnv->UCharErrorBuffer+i != __null" , __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__ )); clang diagnostic pop :: memmove(cnv->UCharErrorBuffer , cnv->UCharErrorBuffer+i, cnv->UCharErrorBufferLength* 2); } while (false) |
| 1902 | cnv->UCharErrorBufferLength*U_SIZEOF_UCHAR)do { clang diagnostic push
clang diagnostic ignored "-Waddress" (static_cast <bool> (cnv->UCharErrorBuffer != __null ) ? void (0) : __assert_fail ("cnv->UCharErrorBuffer != __null" , __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__ )); (static_cast <bool> (cnv->UCharErrorBuffer+i != __null ) ? void (0) : __assert_fail ("cnv->UCharErrorBuffer+i != __null" , __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__ )); clang diagnostic pop :: memmove(cnv->UCharErrorBuffer , cnv->UCharErrorBuffer+i, cnv->UCharErrorBufferLength* 2); } while (false); |
| 1903 | } |
| 1904 | |
| 1905 | if(!U16_IS_LEAD(c)(((c)&0xfffffc00)==0xd800) || i<length) { |
| 1906 | return c; |
| 1907 | } |
| 1908 | /* |
| 1909 | * Continue if the overflow buffer contained only a lead surrogate, |
| 1910 | * in case the converter outputs single surrogates from complete |
| 1911 | * input sequences. |
| 1912 | */ |
| 1913 | } |
| 1914 | |
| 1915 | /* |
| 1916 | * flush==true is implied for ucnv_getNextUChar() |
| 1917 | * |
| 1918 | * do not simply return even if s==sourceLimit because the converter may |
| 1919 | * not have seen flush==true before |
| 1920 | */ |
| 1921 | |
| 1922 | /* prepare the converter arguments */ |
| 1923 | args.converter=cnv; |
| 1924 | args.flush=true; |
| 1925 | args.offsets=nullptr; |
| 1926 | args.source=s; |
| 1927 | args.sourceLimit=sourceLimit; |
| 1928 | args.target=buffer; |
| 1929 | args.targetLimit=buffer+1; |
| 1930 | args.size=sizeof(args); |
| 1931 | |
| 1932 | if(c<0) { |
| 1933 | /* |
| 1934 | * call the native getNextUChar() implementation if we are |
| 1935 | * at a character boundary (toULength==0) |
| 1936 | * |
| 1937 | * unlike with _toUnicode(), getNextUChar() implementations must set |
| 1938 | * U_TRUNCATED_CHAR_FOUND for truncated input, |
| 1939 | * in addition to setting toULength/toUBytes[] |
| 1940 | */ |
| 1941 | if(cnv->toULength==0 && cnv->sharedData->impl->getNextUChar!=nullptr) { |
| 1942 | c=cnv->sharedData->impl->getNextUChar(&args, err); |
| 1943 | *source=s=args.source; |
Although the value stored to 's' is used in the enclosing expression, the value is never actually read from 's' | |
| 1944 | if(*err==U_INDEX_OUTOFBOUNDS_ERROR) { |
| 1945 | /* reset the converter without calling the callback function */ |
| 1946 | _reset(cnv, UCNV_RESET_TO_UNICODE, false); |
| 1947 | return 0xffff; /* no output */ |
| 1948 | } else if(U_SUCCESS(*err) && c>=0) { |
| 1949 | return c; |
| 1950 | /* |
| 1951 | * else fall through to use _toUnicode() because |
| 1952 | * UCNV_GET_NEXT_UCHAR_USE_TO_U: the native function did not want to handle it after all |
| 1953 | * U_FAILURE: call _toUnicode() for callback handling (do not output c) |
| 1954 | */ |
| 1955 | } |
| 1956 | } |
| 1957 | |
| 1958 | /* convert to one char16_t in buffer[0], or handle getNextUChar() errors */ |
| 1959 | _toUnicodeWithCallback(&args, err); |
| 1960 | |
| 1961 | if(*err==U_BUFFER_OVERFLOW_ERROR) { |
| 1962 | *err=U_ZERO_ERROR; |
| 1963 | } |
| 1964 | |
| 1965 | i=0; |
| 1966 | length=(int32_t)(args.target-buffer); |
| 1967 | } else { |
| 1968 | /* write the lead surrogate from the overflow buffer */ |
| 1969 | buffer[0]=(char16_t)c; |
| 1970 | args.target=buffer+1; |
| 1971 | i=0; |
| 1972 | length=1; |
| 1973 | } |
| 1974 | |
| 1975 | /* buffer contents starts at i and ends before length */ |
| 1976 | |
| 1977 | if(U_FAILURE(*err)) { |
| 1978 | c=0xffff; /* no output */ |
| 1979 | } else if(length==0) { |
| 1980 | /* no input or only state changes */ |
| 1981 | *err=U_INDEX_OUTOFBOUNDS_ERROR; |
| 1982 | /* no need to reset explicitly because _toUnicodeWithCallback() did it */ |
| 1983 | c=0xffff; /* no output */ |
| 1984 | } else { |
| 1985 | c=buffer[0]; |
| 1986 | i=1; |
| 1987 | if(!U16_IS_LEAD(c)(((c)&0xfffffc00)==0xd800)) { |
| 1988 | /* consume c=buffer[0], done */ |
| 1989 | } else { |
| 1990 | /* got a lead surrogate, see if a trail surrogate follows */ |
| 1991 | char16_t c2; |
| 1992 | |
| 1993 | if(cnv->UCharErrorBufferLength>0) { |
| 1994 | /* got overflow output from the conversion */ |
| 1995 | if(U16_IS_TRAIL(c2=cnv->UCharErrorBuffer[0])(((c2=cnv->UCharErrorBuffer[0])&0xfffffc00)==0xdc00)) { |
| 1996 | /* got a trail surrogate, too */ |
| 1997 | c=U16_GET_SUPPLEMENTARY(c, c2)(((UChar32)(c)<<10UL)+(UChar32)(c2)-((0xd800<<10UL )+0xdc00-0x10000)); |
| 1998 | |
| 1999 | /* move the remaining overflow contents up to the beginning */ |
| 2000 | if((--cnv->UCharErrorBufferLength)>0) { |
| 2001 | uprv_memmove(cnv->UCharErrorBuffer, cnv->UCharErrorBuffer+1,do { clang diagnostic push
clang diagnostic ignored "-Waddress" (static_cast <bool> (cnv->UCharErrorBuffer != __null ) ? void (0) : __assert_fail ("cnv->UCharErrorBuffer != __null" , __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__ )); (static_cast <bool> (cnv->UCharErrorBuffer+1 != __null ) ? void (0) : __assert_fail ("cnv->UCharErrorBuffer+1 != __null" , __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__ )); clang diagnostic pop :: memmove(cnv->UCharErrorBuffer , cnv->UCharErrorBuffer+1, cnv->UCharErrorBufferLength* 2); } while (false) |
| 2002 | cnv->UCharErrorBufferLength*U_SIZEOF_UCHAR)do { clang diagnostic push
clang diagnostic ignored "-Waddress" (static_cast <bool> (cnv->UCharErrorBuffer != __null ) ? void (0) : __assert_fail ("cnv->UCharErrorBuffer != __null" , __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__ )); (static_cast <bool> (cnv->UCharErrorBuffer+1 != __null ) ? void (0) : __assert_fail ("cnv->UCharErrorBuffer+1 != __null" , __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__ )); clang diagnostic pop :: memmove(cnv->UCharErrorBuffer , cnv->UCharErrorBuffer+1, cnv->UCharErrorBufferLength* 2); } while (false); |
| 2003 | } |
| 2004 | } else { |
| 2005 | /* c is an unpaired lead surrogate, just return it */ |
| 2006 | } |
| 2007 | } else if(args.source<sourceLimit) { |
| 2008 | /* convert once more, to buffer[1] */ |
| 2009 | args.targetLimit=buffer+2; |
| 2010 | _toUnicodeWithCallback(&args, err); |
| 2011 | if(*err==U_BUFFER_OVERFLOW_ERROR) { |
| 2012 | *err=U_ZERO_ERROR; |
| 2013 | } |
| 2014 | |
| 2015 | length=(int32_t)(args.target-buffer); |
| 2016 | if(U_SUCCESS(*err) && length==2 && U16_IS_TRAIL(c2=buffer[1])(((c2=buffer[1])&0xfffffc00)==0xdc00)) { |
| 2017 | /* got a trail surrogate, too */ |
| 2018 | c=U16_GET_SUPPLEMENTARY(c, c2)(((UChar32)(c)<<10UL)+(UChar32)(c2)-((0xd800<<10UL )+0xdc00-0x10000)); |
| 2019 | i=2; |
| 2020 | } |
| 2021 | } |
| 2022 | } |
| 2023 | } |
| 2024 | |
| 2025 | /* |
| 2026 | * move leftover output from buffer[i..length[ |
| 2027 | * into the beginning of the overflow buffer |
| 2028 | */ |
| 2029 | if(i<length) { |
| 2030 | /* move further overflow back */ |
| 2031 | int32_t delta=length-i; |
| 2032 | if((length=cnv->UCharErrorBufferLength)>0) { |
| 2033 | uprv_memmove(cnv->UCharErrorBuffer+delta, cnv->UCharErrorBuffer,do { clang diagnostic push
clang diagnostic ignored "-Waddress" (static_cast <bool> (cnv->UCharErrorBuffer+delta != __null) ? void (0) : __assert_fail ("cnv->UCharErrorBuffer+delta != __null" , __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__ )); (static_cast <bool> (cnv->UCharErrorBuffer != __null ) ? void (0) : __assert_fail ("cnv->UCharErrorBuffer != __null" , __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__ )); clang diagnostic pop :: memmove(cnv->UCharErrorBuffer +delta, cnv->UCharErrorBuffer, length*2); } while (false) |
| 2034 | length*U_SIZEOF_UCHAR)do { clang diagnostic push
clang diagnostic ignored "-Waddress" (static_cast <bool> (cnv->UCharErrorBuffer+delta != __null) ? void (0) : __assert_fail ("cnv->UCharErrorBuffer+delta != __null" , __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__ )); (static_cast <bool> (cnv->UCharErrorBuffer != __null ) ? void (0) : __assert_fail ("cnv->UCharErrorBuffer != __null" , __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__ )); clang diagnostic pop :: memmove(cnv->UCharErrorBuffer +delta, cnv->UCharErrorBuffer, length*2); } while (false); |
| 2035 | } |
| 2036 | cnv->UCharErrorBufferLength=(int8_t)(length+delta); |
| 2037 | |
| 2038 | cnv->UCharErrorBuffer[0]=buffer[i++]; |
| 2039 | if(delta>1) { |
| 2040 | cnv->UCharErrorBuffer[1]=buffer[i]; |
| 2041 | } |
| 2042 | } |
| 2043 | |
| 2044 | *source=args.source; |
| 2045 | return c; |
| 2046 | } |
| 2047 | |
| 2048 | /* ucnv_convert() and siblings ---------------------------------------------- */ |
| 2049 | |
| 2050 | U_CAPIextern "C" void U_EXPORT2 |
| 2051 | ucnv_convertEx(UConverter *targetCnv, UConverter *sourceCnv, |
| 2052 | char **target, const char *targetLimit, |
| 2053 | const char **source, const char *sourceLimit, |
| 2054 | char16_t *pivotStart, char16_t **pivotSource, |
| 2055 | char16_t **pivotTarget, const char16_t *pivotLimit, |
| 2056 | UBool reset, UBool flush, |
| 2057 | UErrorCode *pErrorCode) { |
| 2058 | char16_t pivotBuffer[CHUNK_SIZE1024]; |
| 2059 | const char16_t *myPivotSource; |
| 2060 | char16_t *myPivotTarget; |
| 2061 | const char *s; |
| 2062 | char *t; |
| 2063 | |
| 2064 | UConverterToUnicodeArgs toUArgs; |
| 2065 | UConverterFromUnicodeArgs fromUArgs; |
| 2066 | UConverterConvert convert; |
| 2067 | |
| 2068 | /* error checking */ |
| 2069 | if(pErrorCode==nullptr || U_FAILURE(*pErrorCode)) { |
| 2070 | return; |
| 2071 | } |
| 2072 | |
| 2073 | if( targetCnv==nullptr || sourceCnv==nullptr || |
| 2074 | source==nullptr || *source==nullptr || |
| 2075 | target==nullptr || *target==nullptr || targetLimit==nullptr |
| 2076 | ) { |
| 2077 | *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| 2078 | return; |
| 2079 | } |
| 2080 | |
| 2081 | s=*source; |
| 2082 | t=*target; |
| 2083 | if((sourceLimit!=nullptr && sourceLimit<s) || targetLimit<t) { |
| 2084 | *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| 2085 | return; |
| 2086 | } |
| 2087 | |
| 2088 | /* |
| 2089 | * Make sure that the buffer sizes do not exceed the number range for |
| 2090 | * int32_t. See ucnv_toUnicode() for a more detailed comment. |
| 2091 | */ |
| 2092 | if( |
| 2093 | (sourceLimit!=nullptr && ((size_t)(sourceLimit-s)>(size_t)0x7fffffff && sourceLimit>s)) || |
| 2094 | ((size_t)(targetLimit-t)>(size_t)0x7fffffff && targetLimit>t) |
| 2095 | ) { |
| 2096 | *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| 2097 | return; |
| 2098 | } |
| 2099 | |
| 2100 | if(pivotStart==nullptr) { |
| 2101 | if(!flush) { |
| 2102 | /* streaming conversion requires an explicit pivot buffer */ |
| 2103 | *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| 2104 | return; |
| 2105 | } |
| 2106 | |
| 2107 | /* use the stack pivot buffer */ |
| 2108 | myPivotSource=myPivotTarget=pivotStart=pivotBuffer; |
| 2109 | pivotSource=(char16_t **)&myPivotSource; |
| 2110 | pivotTarget=&myPivotTarget; |
| 2111 | pivotLimit=pivotBuffer+CHUNK_SIZE1024; |
| 2112 | } else if( pivotStart>=pivotLimit || |
| 2113 | pivotSource==nullptr || *pivotSource==nullptr || |
| 2114 | pivotTarget==nullptr || *pivotTarget==nullptr || |
| 2115 | pivotLimit==nullptr |
| 2116 | ) { |
| 2117 | *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| 2118 | return; |
| 2119 | } |
| 2120 | |
| 2121 | if(sourceLimit==nullptr) { |
| 2122 | /* get limit of single-byte-NUL-terminated source string */ |
| 2123 | sourceLimit=uprv_strchr(*source, 0):: strchr(*source, 0); |
| 2124 | } |
| 2125 | |
| 2126 | if(reset) { |
| 2127 | ucnv_resetToUnicode(sourceCnv); |
| 2128 | ucnv_resetFromUnicode(targetCnv); |
| 2129 | *pivotSource=*pivotTarget=pivotStart; |
| 2130 | } else if(targetCnv->charErrorBufferLength>0) { |
| 2131 | /* output the targetCnv overflow buffer */ |
| 2132 | if(ucnv_outputOverflowFromUnicode(targetCnv, target, targetLimit, nullptr, pErrorCode)) { |
| 2133 | /* U_BUFFER_OVERFLOW_ERROR */ |
| 2134 | return; |
| 2135 | } |
| 2136 | /* *target has moved, therefore stop using t */ |
| 2137 | |
| 2138 | if( !flush && |
| 2139 | targetCnv->preFromULength>=0 && *pivotSource==*pivotTarget && |
| 2140 | sourceCnv->UCharErrorBufferLength==0 && sourceCnv->preToULength>=0 && s==sourceLimit |
| 2141 | ) { |
| 2142 | /* the fromUnicode overflow buffer is emptied and there is no new input: we are done */ |
| 2143 | return; |
| 2144 | } |
| 2145 | } |
| 2146 | |
| 2147 | /* Is direct-UTF-8 conversion available? */ |
| 2148 | if( sourceCnv->sharedData->staticData->conversionType==UCNV_UTF8 && |
| 2149 | targetCnv->sharedData->impl->fromUTF8!=nullptr |
| 2150 | ) { |
| 2151 | convert=targetCnv->sharedData->impl->fromUTF8; |
| 2152 | } else if( targetCnv->sharedData->staticData->conversionType==UCNV_UTF8 && |
| 2153 | sourceCnv->sharedData->impl->toUTF8!=nullptr |
| 2154 | ) { |
| 2155 | convert=sourceCnv->sharedData->impl->toUTF8; |
| 2156 | } else { |
| 2157 | convert=nullptr; |
| 2158 | } |
| 2159 | |
| 2160 | /* |
| 2161 | * If direct-UTF-8 conversion is available, then we use a smaller |
| 2162 | * pivot buffer for error handling and partial matches |
| 2163 | * so that we quickly return to direct conversion. |
| 2164 | * |
| 2165 | * 32 is large enough for UCNV_EXT_MAX_UCHARS and UCNV_ERROR_BUFFER_LENGTH. |
| 2166 | * |
| 2167 | * We could reduce the pivot buffer size further, at the cost of |
| 2168 | * buffer overflows from callbacks. |
| 2169 | * The pivot buffer should not be smaller than the maximum number of |
| 2170 | * fromUnicode extension table input UChars |
| 2171 | * (for m:n conversion, see |
| 2172 | * targetCnv->sharedData->mbcs.extIndexes[UCNV_EXT_COUNT_UCHARS]) |
| 2173 | * or 2 for surrogate pairs. |
| 2174 | * |
| 2175 | * Too small a buffer can cause thrashing between pivoting and direct |
| 2176 | * conversion, with function call overhead outweighing the benefits |
| 2177 | * of direct conversion. |
| 2178 | */ |
| 2179 | if(convert!=nullptr && (pivotLimit-pivotStart)>32) { |
| 2180 | pivotLimit=pivotStart+32; |
| 2181 | } |
| 2182 | |
| 2183 | /* prepare the converter arguments */ |
| 2184 | fromUArgs.converter=targetCnv; |
| 2185 | fromUArgs.flush=false; |
| 2186 | fromUArgs.offsets=nullptr; |
| 2187 | fromUArgs.target=*target; |
| 2188 | fromUArgs.targetLimit=targetLimit; |
| 2189 | fromUArgs.size=sizeof(fromUArgs); |
| 2190 | |
| 2191 | toUArgs.converter=sourceCnv; |
| 2192 | toUArgs.flush=flush; |
| 2193 | toUArgs.offsets=nullptr; |
| 2194 | toUArgs.source=s; |
| 2195 | toUArgs.sourceLimit=sourceLimit; |
| 2196 | toUArgs.targetLimit=pivotLimit; |
| 2197 | toUArgs.size=sizeof(toUArgs); |
| 2198 | |
| 2199 | /* |
| 2200 | * TODO: Consider separating this function into two functions, |
| 2201 | * extracting exactly the conversion loop, |
| 2202 | * for readability and to reduce the set of visible variables. |
| 2203 | * |
| 2204 | * Otherwise stop using s and t from here on. |
| 2205 | */ |
| 2206 | s=t=nullptr; |
| 2207 | |
| 2208 | /* |
| 2209 | * conversion loop |
| 2210 | * |
| 2211 | * The sequence of steps in the loop may appear backward, |
| 2212 | * but the principle is simple: |
| 2213 | * In the chain of |
| 2214 | * source - sourceCnv overflow - pivot - targetCnv overflow - target |
| 2215 | * empty out later buffers before refilling them from earlier ones. |
| 2216 | * |
| 2217 | * The targetCnv overflow buffer is flushed out only once before the loop. |
| 2218 | */ |
| 2219 | for(;;) { |
| 2220 | /* |
| 2221 | * if(pivot not empty or error or replay or flush fromUnicode) { |
| 2222 | * fromUnicode(pivot -> target); |
| 2223 | * } |
| 2224 | * |
| 2225 | * For pivoting conversion; and for direct conversion for |
| 2226 | * error callback handling and flushing the replay buffer. |
| 2227 | */ |
| 2228 | if( *pivotSource<*pivotTarget || |
| 2229 | U_FAILURE(*pErrorCode) || |
| 2230 | targetCnv->preFromULength<0 || |
| 2231 | fromUArgs.flush |
| 2232 | ) { |
| 2233 | fromUArgs.source=*pivotSource; |
| 2234 | fromUArgs.sourceLimit=*pivotTarget; |
| 2235 | _fromUnicodeWithCallback(&fromUArgs, pErrorCode); |
| 2236 | if(U_FAILURE(*pErrorCode)) { |
| 2237 | /* target overflow, or conversion error */ |
| 2238 | *pivotSource=(char16_t *)fromUArgs.source; |
| 2239 | break; |
| 2240 | } |
| 2241 | |
| 2242 | /* |
| 2243 | * _fromUnicodeWithCallback() must have consumed the pivot contents |
| 2244 | * (*pivotSource==*pivotTarget) since it returned with U_SUCCESS() |
| 2245 | */ |
| 2246 | } |
| 2247 | |
| 2248 | /* The pivot buffer is empty; reset it so we start at pivotStart. */ |
| 2249 | *pivotSource=*pivotTarget=pivotStart; |
| 2250 | |
| 2251 | /* |
| 2252 | * if(sourceCnv overflow buffer not empty) { |
| 2253 | * move(sourceCnv overflow buffer -> pivot); |
| 2254 | * continue; |
| 2255 | * } |
| 2256 | */ |
| 2257 | /* output the sourceCnv overflow buffer */ |
| 2258 | if(sourceCnv->UCharErrorBufferLength>0) { |
| 2259 | if(ucnv_outputOverflowToUnicode(sourceCnv, pivotTarget, pivotLimit, nullptr, pErrorCode)) { |
| 2260 | /* U_BUFFER_OVERFLOW_ERROR */ |
| 2261 | *pErrorCode=U_ZERO_ERROR; |
| 2262 | } |
| 2263 | continue; |
| 2264 | } |
| 2265 | |
| 2266 | /* |
| 2267 | * check for end of input and break if done |
| 2268 | * |
| 2269 | * Checking both flush and fromUArgs.flush ensures that the converters |
| 2270 | * have been called with the flush flag set if the ucnv_convertEx() |
| 2271 | * caller set it. |
| 2272 | */ |
| 2273 | if( toUArgs.source==sourceLimit && |
| 2274 | sourceCnv->preToULength>=0 && sourceCnv->toULength==0 && |
| 2275 | (!flush || fromUArgs.flush) |
| 2276 | ) { |
| 2277 | /* done successfully */ |
| 2278 | break; |
| 2279 | } |
| 2280 | |
| 2281 | /* |
| 2282 | * use direct conversion if available |
| 2283 | * but not if continuing a partial match |
| 2284 | * or flushing the toUnicode replay buffer |
| 2285 | */ |
| 2286 | if(convert!=nullptr && targetCnv->preFromUFirstCP<0 && sourceCnv->preToULength==0) { |
| 2287 | if(*pErrorCode==U_USING_DEFAULT_WARNING) { |
| 2288 | /* remove a warning that may be set by this function */ |
| 2289 | *pErrorCode=U_ZERO_ERROR; |
| 2290 | } |
| 2291 | convert(&fromUArgs, &toUArgs, pErrorCode); |
| 2292 | if(*pErrorCode==U_BUFFER_OVERFLOW_ERROR) { |
| 2293 | break; |
| 2294 | } else if(U_FAILURE(*pErrorCode)) { |
| 2295 | if(sourceCnv->toULength>0) { |
| 2296 | /* |
| 2297 | * Fall through to calling _toUnicodeWithCallback() |
| 2298 | * for callback handling. |
| 2299 | * |
| 2300 | * The pivot buffer will be reset with |
| 2301 | * *pivotSource=*pivotTarget=pivotStart; |
| 2302 | * which indicates a toUnicode error to the caller |
| 2303 | * (*pivotSource==pivotStart shows no pivot UChars consumed). |
| 2304 | */ |
| 2305 | } else { |
| 2306 | /* |
| 2307 | * Indicate a fromUnicode error to the caller |
| 2308 | * (*pivotSource>pivotStart shows some pivot UChars consumed). |
| 2309 | */ |
| 2310 | *pivotSource=*pivotTarget=pivotStart+1; |
| 2311 | /* |
| 2312 | * Loop around to calling _fromUnicodeWithCallbacks() |
| 2313 | * for callback handling. |
| 2314 | */ |
| 2315 | continue; |
| 2316 | } |
| 2317 | } else if(*pErrorCode==U_USING_DEFAULT_WARNING) { |
| 2318 | /* |
| 2319 | * No error, but the implementation requested to temporarily |
| 2320 | * fall back to pivoting. |
| 2321 | */ |
| 2322 | *pErrorCode=U_ZERO_ERROR; |
| 2323 | /* |
| 2324 | * The following else branches are almost identical to the end-of-input |
| 2325 | * handling in _toUnicodeWithCallback(). |
| 2326 | * Avoid calling it just for the end of input. |
| 2327 | */ |
| 2328 | } else if(flush && sourceCnv->toULength>0) { /* flush==toUArgs.flush */ |
| 2329 | /* |
| 2330 | * the entire input stream is consumed |
| 2331 | * and there is a partial, truncated input sequence left |
| 2332 | */ |
| 2333 | |
| 2334 | /* inject an error and continue with callback handling */ |
| 2335 | *pErrorCode=U_TRUNCATED_CHAR_FOUND; |
| 2336 | } else { |
| 2337 | /* input consumed */ |
| 2338 | if(flush) { |
| 2339 | /* reset the converters without calling the callback functions */ |
| 2340 | _reset(sourceCnv, UCNV_RESET_TO_UNICODE, false); |
| 2341 | _reset(targetCnv, UCNV_RESET_FROM_UNICODE, false); |
| 2342 | } |
| 2343 | |
| 2344 | /* done successfully */ |
| 2345 | break; |
| 2346 | } |
| 2347 | } |
| 2348 | |
| 2349 | /* |
| 2350 | * toUnicode(source -> pivot); |
| 2351 | * |
| 2352 | * For pivoting conversion; and for direct conversion for |
| 2353 | * error callback handling, continuing partial matches |
| 2354 | * and flushing the replay buffer. |
| 2355 | * |
| 2356 | * The pivot buffer is empty and reset. |
| 2357 | */ |
| 2358 | toUArgs.target=pivotStart; /* ==*pivotTarget */ |
| 2359 | /* toUArgs.targetLimit=pivotLimit; already set before the loop */ |
| 2360 | _toUnicodeWithCallback(&toUArgs, pErrorCode); |
| 2361 | *pivotTarget=toUArgs.target; |
| 2362 | if(*pErrorCode==U_BUFFER_OVERFLOW_ERROR) { |
| 2363 | /* pivot overflow: continue with the conversion loop */ |
| 2364 | *pErrorCode=U_ZERO_ERROR; |
| 2365 | } else if(U_FAILURE(*pErrorCode) || (!flush && *pivotTarget==pivotStart)) { |
| 2366 | /* conversion error, or there was nothing left to convert */ |
| 2367 | break; |
| 2368 | } |
| 2369 | /* |
| 2370 | * else: |
| 2371 | * _toUnicodeWithCallback() wrote into the pivot buffer, |
| 2372 | * continue with fromUnicode conversion. |
| 2373 | * |
| 2374 | * Set the fromUnicode flush flag if we flush and if toUnicode has |
| 2375 | * processed the end of the input. |
| 2376 | */ |
| 2377 | if( flush && toUArgs.source==sourceLimit && |
| 2378 | sourceCnv->preToULength>=0 && |
| 2379 | sourceCnv->UCharErrorBufferLength==0 |
| 2380 | ) { |
| 2381 | fromUArgs.flush=true; |
| 2382 | } |
| 2383 | } |
| 2384 | |
| 2385 | /* |
| 2386 | * The conversion loop is exited when one of the following is true: |
| 2387 | * - the entire source text has been converted successfully to the target buffer |
| 2388 | * - a target buffer overflow occurred |
| 2389 | * - a conversion error occurred |
| 2390 | */ |
| 2391 | |
| 2392 | *source=toUArgs.source; |
| 2393 | *target=fromUArgs.target; |
| 2394 | |
| 2395 | /* terminate the target buffer if possible */ |
| 2396 | if(flush && U_SUCCESS(*pErrorCode)) { |
| 2397 | if(*target!=targetLimit) { |
| 2398 | **target=0; |
| 2399 | if(*pErrorCode==U_STRING_NOT_TERMINATED_WARNING) { |
| 2400 | *pErrorCode=U_ZERO_ERROR; |
| 2401 | } |
| 2402 | } else { |
| 2403 | *pErrorCode=U_STRING_NOT_TERMINATED_WARNING; |
| 2404 | } |
| 2405 | } |
| 2406 | } |
| 2407 | |
| 2408 | /* internal implementation of ucnv_convert() etc. with preflighting */ |
| 2409 | static int32_t |
| 2410 | ucnv_internalConvert(UConverter *outConverter, UConverter *inConverter, |
| 2411 | char *target, int32_t targetCapacity, |
| 2412 | const char *source, int32_t sourceLength, |
| 2413 | UErrorCode *pErrorCode) { |
| 2414 | char16_t pivotBuffer[CHUNK_SIZE1024]; |
| 2415 | char16_t *pivot, *pivot2; |
| 2416 | |
| 2417 | char *myTarget; |
| 2418 | const char *sourceLimit; |
| 2419 | const char *targetLimit; |
| 2420 | int32_t targetLength=0; |
| 2421 | |
| 2422 | /* set up */ |
| 2423 | if(sourceLength<0) { |
| 2424 | sourceLimit=uprv_strchr(source, 0):: strchr(source, 0); |
| 2425 | } else { |
| 2426 | sourceLimit=source+sourceLength; |
| 2427 | } |
| 2428 | |
| 2429 | /* if there is no input data, we're done */ |
| 2430 | if(source==sourceLimit) { |
| 2431 | return u_terminateChars(target, targetCapacity, 0, pErrorCode); |
| 2432 | } |
| 2433 | |
| 2434 | pivot=pivot2=pivotBuffer; |
| 2435 | myTarget=target; |
| 2436 | targetLength=0; |
| 2437 | |
| 2438 | if(targetCapacity>0) { |
| 2439 | /* perform real conversion */ |
| 2440 | targetLimit=target+targetCapacity; |
| 2441 | ucnv_convertEx(outConverter, inConverter, |
| 2442 | &myTarget, targetLimit, |
| 2443 | &source, sourceLimit, |
| 2444 | pivotBuffer, &pivot, &pivot2, pivotBuffer+CHUNK_SIZE1024, |
| 2445 | false, |
| 2446 | true, |
| 2447 | pErrorCode); |
| 2448 | targetLength = static_cast<int32_t>(myTarget - target); |
| 2449 | } |
| 2450 | |
| 2451 | /* |
| 2452 | * If the output buffer is exhausted (or we are only "preflighting"), we need to stop writing |
| 2453 | * to it but continue the conversion in order to store in targetCapacity |
| 2454 | * the number of bytes that was required. |
| 2455 | */ |
| 2456 | if(*pErrorCode==U_BUFFER_OVERFLOW_ERROR || targetCapacity==0) |
| 2457 | { |
| 2458 | char targetBuffer[CHUNK_SIZE1024]; |
| 2459 | |
| 2460 | targetLimit=targetBuffer+CHUNK_SIZE1024; |
| 2461 | do { |
| 2462 | *pErrorCode=U_ZERO_ERROR; |
| 2463 | myTarget=targetBuffer; |
| 2464 | ucnv_convertEx(outConverter, inConverter, |
| 2465 | &myTarget, targetLimit, |
| 2466 | &source, sourceLimit, |
| 2467 | pivotBuffer, &pivot, &pivot2, pivotBuffer+CHUNK_SIZE1024, |
| 2468 | false, |
| 2469 | true, |
| 2470 | pErrorCode); |
| 2471 | targetLength += static_cast<int32_t>(myTarget - targetBuffer); |
| 2472 | } while(*pErrorCode==U_BUFFER_OVERFLOW_ERROR); |
| 2473 | |
| 2474 | /* done with preflighting, set warnings and errors as appropriate */ |
| 2475 | return u_terminateChars(target, targetCapacity, targetLength, pErrorCode); |
| 2476 | } |
| 2477 | |
| 2478 | /* no need to call u_terminateChars() because ucnv_convertEx() took care of that */ |
| 2479 | return targetLength; |
| 2480 | } |
| 2481 | |
| 2482 | U_CAPIextern "C" int32_t U_EXPORT2 |
| 2483 | ucnv_convert(const char *toConverterName, const char *fromConverterName, |
| 2484 | char *target, int32_t targetCapacity, |
| 2485 | const char *source, int32_t sourceLength, |
| 2486 | UErrorCode *pErrorCode) { |
| 2487 | UConverter in, out; /* stack-allocated */ |
| 2488 | UConverter *inConverter, *outConverter; |
| 2489 | int32_t targetLength; |
| 2490 | |
| 2491 | if(pErrorCode==nullptr || U_FAILURE(*pErrorCode)) { |
| 2492 | return 0; |
| 2493 | } |
| 2494 | |
| 2495 | if( source==nullptr || sourceLength<-1 || |
| 2496 | targetCapacity<0 || (targetCapacity>0 && target==nullptr) |
| 2497 | ) { |
| 2498 | *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| 2499 | return 0; |
| 2500 | } |
| 2501 | |
| 2502 | /* if there is no input data, we're done */ |
| 2503 | if(sourceLength==0 || (sourceLength<0 && *source==0)) { |
| 2504 | return u_terminateChars(target, targetCapacity, 0, pErrorCode); |
| 2505 | } |
| 2506 | |
| 2507 | /* create the converters */ |
| 2508 | inConverter=ucnv_createConverter(&in, fromConverterName, pErrorCode); |
| 2509 | if(U_FAILURE(*pErrorCode)) { |
| 2510 | return 0; |
| 2511 | } |
| 2512 | |
| 2513 | outConverter=ucnv_createConverter(&out, toConverterName, pErrorCode); |
| 2514 | if(U_FAILURE(*pErrorCode)) { |
| 2515 | ucnv_close(inConverter); |
| 2516 | return 0; |
| 2517 | } |
| 2518 | |
| 2519 | targetLength=ucnv_internalConvert(outConverter, inConverter, |
| 2520 | target, targetCapacity, |
| 2521 | source, sourceLength, |
| 2522 | pErrorCode); |
| 2523 | |
| 2524 | ucnv_close(inConverter); |
| 2525 | ucnv_close(outConverter); |
| 2526 | |
| 2527 | return targetLength; |
| 2528 | } |
| 2529 | |
| 2530 | /* @internal */ |
| 2531 | static int32_t |
| 2532 | ucnv_convertAlgorithmic(UBool convertToAlgorithmic, |
| 2533 | UConverterType algorithmicType, |
| 2534 | UConverter *cnv, |
| 2535 | char *target, int32_t targetCapacity, |
| 2536 | const char *source, int32_t sourceLength, |
| 2537 | UErrorCode *pErrorCode) { |
| 2538 | UConverter algoConverterStatic; /* stack-allocated */ |
| 2539 | UConverter *algoConverter, *to, *from; |
| 2540 | int32_t targetLength; |
| 2541 | |
| 2542 | if(pErrorCode==nullptr || U_FAILURE(*pErrorCode)) { |
| 2543 | return 0; |
| 2544 | } |
| 2545 | |
| 2546 | if( cnv==nullptr || source==nullptr || sourceLength<-1 || |
| 2547 | targetCapacity<0 || (targetCapacity>0 && target==nullptr) |
| 2548 | ) { |
| 2549 | *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| 2550 | return 0; |
| 2551 | } |
| 2552 | |
| 2553 | /* if there is no input data, we're done */ |
| 2554 | if(sourceLength==0 || (sourceLength<0 && *source==0)) { |
| 2555 | return u_terminateChars(target, targetCapacity, 0, pErrorCode); |
| 2556 | } |
| 2557 | |
| 2558 | /* create the algorithmic converter */ |
| 2559 | algoConverter=ucnv_createAlgorithmicConverter(&algoConverterStatic, algorithmicType, |
| 2560 | "", 0, pErrorCode); |
| 2561 | if(U_FAILURE(*pErrorCode)) { |
| 2562 | return 0; |
| 2563 | } |
| 2564 | |
| 2565 | /* reset the other converter */ |
| 2566 | if(convertToAlgorithmic) { |
| 2567 | /* cnv->Unicode->algo */ |
| 2568 | ucnv_resetToUnicode(cnv); |
| 2569 | to=algoConverter; |
| 2570 | from=cnv; |
| 2571 | } else { |
| 2572 | /* algo->Unicode->cnv */ |
| 2573 | ucnv_resetFromUnicode(cnv); |
| 2574 | from=algoConverter; |
| 2575 | to=cnv; |
| 2576 | } |
| 2577 | |
| 2578 | targetLength=ucnv_internalConvert(to, from, |
| 2579 | target, targetCapacity, |
| 2580 | source, sourceLength, |
| 2581 | pErrorCode); |
| 2582 | |
| 2583 | ucnv_close(algoConverter); |
| 2584 | |
| 2585 | return targetLength; |
| 2586 | } |
| 2587 | |
| 2588 | U_CAPIextern "C" int32_t U_EXPORT2 |
| 2589 | ucnv_toAlgorithmic(UConverterType algorithmicType, |
| 2590 | UConverter *cnv, |
| 2591 | char *target, int32_t targetCapacity, |
| 2592 | const char *source, int32_t sourceLength, |
| 2593 | UErrorCode *pErrorCode) { |
| 2594 | return ucnv_convertAlgorithmic(true, algorithmicType, cnv, |
| 2595 | target, targetCapacity, |
| 2596 | source, sourceLength, |
| 2597 | pErrorCode); |
| 2598 | } |
| 2599 | |
| 2600 | U_CAPIextern "C" int32_t U_EXPORT2 |
| 2601 | ucnv_fromAlgorithmic(UConverter *cnv, |
| 2602 | UConverterType algorithmicType, |
| 2603 | char *target, int32_t targetCapacity, |
| 2604 | const char *source, int32_t sourceLength, |
| 2605 | UErrorCode *pErrorCode) UPRV_NO_SANITIZE_UNDEFINED__attribute__((no_sanitize("undefined"))) { |
| 2606 | |
| 2607 | if(algorithmicType<0 || UCNV_NUMBER_OF_SUPPORTED_CONVERTER_TYPES<=algorithmicType) { |
| 2608 | *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR; |
| 2609 | return 0; |
| 2610 | } |
| 2611 | return ucnv_convertAlgorithmic(false, algorithmicType, cnv, |
| 2612 | target, targetCapacity, |
| 2613 | source, sourceLength, |
| 2614 | pErrorCode); |
| 2615 | } |
| 2616 | |
| 2617 | U_CAPIextern "C" UConverterType U_EXPORT2 |
| 2618 | ucnv_getType(const UConverter* converter) |
| 2619 | { |
| 2620 | int8_t type = converter->sharedData->staticData->conversionType; |
| 2621 | #if !UCONFIG_NO_LEGACY_CONVERSION1 |
| 2622 | if(type == UCNV_MBCS) { |
| 2623 | return ucnv_MBCSGetType(converter); |
| 2624 | } |
| 2625 | #endif |
| 2626 | return (UConverterType)type; |
| 2627 | } |
| 2628 | |
| 2629 | U_CAPIextern "C" void U_EXPORT2 |
| 2630 | ucnv_getStarters(const UConverter* converter, |
| 2631 | UBool starters[256], |
| 2632 | UErrorCode* err) |
| 2633 | { |
| 2634 | if (err == nullptr || U_FAILURE(*err)) { |
| 2635 | return; |
| 2636 | } |
| 2637 | |
| 2638 | if(converter->sharedData->impl->getStarters != nullptr) { |
| 2639 | converter->sharedData->impl->getStarters(converter, starters, err); |
| 2640 | } else { |
| 2641 | *err = U_ILLEGAL_ARGUMENT_ERROR; |
| 2642 | } |
| 2643 | } |
| 2644 | |
| 2645 | static const UAmbiguousConverter *ucnv_getAmbiguous(const UConverter *cnv) |
| 2646 | { |
| 2647 | UErrorCode errorCode; |
| 2648 | const char *name; |
| 2649 | int32_t i; |
| 2650 | |
| 2651 | if(cnv==nullptr) { |
| 2652 | return nullptr; |
| 2653 | } |
| 2654 | |
| 2655 | errorCode=U_ZERO_ERROR; |
| 2656 | name=ucnv_getName(cnv, &errorCode); |
| 2657 | if(U_FAILURE(errorCode)) { |
| 2658 | return nullptr; |
| 2659 | } |
| 2660 | |
| 2661 | for(i=0; i<UPRV_LENGTHOF(ambiguousConverters)(int32_t)(sizeof(ambiguousConverters)/sizeof((ambiguousConverters )[0])); ++i) |
| 2662 | { |
| 2663 | if(0==uprv_strcmp(name, ambiguousConverters[i].name):: strcmp(name, ambiguousConverters[i].name)) |
| 2664 | { |
| 2665 | return ambiguousConverters+i; |
| 2666 | } |
| 2667 | } |
| 2668 | |
| 2669 | return nullptr; |
| 2670 | } |
| 2671 | |
| 2672 | U_CAPIextern "C" void U_EXPORT2 |
| 2673 | ucnv_fixFileSeparator(const UConverter *cnv, |
| 2674 | char16_t* source, |
| 2675 | int32_t sourceLength) { |
| 2676 | const UAmbiguousConverter *a; |
| 2677 | int32_t i; |
| 2678 | char16_t variant5c; |
| 2679 | |
| 2680 | if(cnv==nullptr || source==nullptr || sourceLength<=0 || (a=ucnv_getAmbiguous(cnv))==nullptr) |
| 2681 | { |
| 2682 | return; |
| 2683 | } |
| 2684 | |
| 2685 | variant5c=a->variant5c; |
| 2686 | for(i=0; i<sourceLength; ++i) { |
| 2687 | if(source[i]==variant5c) { |
| 2688 | source[i]=0x5c; |
| 2689 | } |
| 2690 | } |
| 2691 | } |
| 2692 | |
| 2693 | U_CAPIextern "C" UBool U_EXPORT2 |
| 2694 | ucnv_isAmbiguous(const UConverter *cnv) { |
| 2695 | return ucnv_getAmbiguous(cnv)!=nullptr; |
| 2696 | } |
| 2697 | |
| 2698 | U_CAPIextern "C" void U_EXPORT2 |
| 2699 | ucnv_setFallback(UConverter *cnv, UBool usesFallback) |
| 2700 | { |
| 2701 | cnv->useFallback = usesFallback; |
| 2702 | } |
| 2703 | |
| 2704 | U_CAPIextern "C" UBool U_EXPORT2 |
| 2705 | ucnv_usesFallback(const UConverter *cnv) |
| 2706 | { |
| 2707 | return cnv->useFallback; |
| 2708 | } |
| 2709 | |
| 2710 | U_CAPIextern "C" void U_EXPORT2 |
| 2711 | ucnv_getInvalidChars (const UConverter * converter, |
| 2712 | char *errBytes, |
| 2713 | int8_t * len, |
| 2714 | UErrorCode * err) |
| 2715 | { |
| 2716 | if (err == nullptr || U_FAILURE(*err)) |
| 2717 | { |
| 2718 | return; |
| 2719 | } |
| 2720 | if (len == nullptr || errBytes == nullptr || converter == nullptr) |
| 2721 | { |
| 2722 | *err = U_ILLEGAL_ARGUMENT_ERROR; |
| 2723 | return; |
| 2724 | } |
| 2725 | if (*len < converter->invalidCharLength) |
| 2726 | { |
| 2727 | *err = U_INDEX_OUTOFBOUNDS_ERROR; |
| 2728 | return; |
| 2729 | } |
| 2730 | if ((*len = converter->invalidCharLength) > 0) |
| 2731 | { |
| 2732 | uprv_memcpy (errBytes, converter->invalidCharBuffer, *len)do { clang diagnostic push
clang diagnostic ignored "-Waddress" (static_cast <bool> (errBytes != __null) ? void (0) : __assert_fail ("errBytes != __null", __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__)); (static_cast <bool > (converter->invalidCharBuffer != __null) ? void (0) : __assert_fail ("converter->invalidCharBuffer != __null", __builtin_FILE (), __builtin_LINE (), __extension__ __PRETTY_FUNCTION__)); clang diagnostic pop :: memcpy(errBytes, converter->invalidCharBuffer , *len); } while (false); |
| 2733 | } |
| 2734 | } |
| 2735 | |
| 2736 | U_CAPIextern "C" void U_EXPORT2 |
| 2737 | ucnv_getInvalidUChars (const UConverter * converter, |
| 2738 | char16_t *errChars, |
| 2739 | int8_t * len, |
| 2740 | UErrorCode * err) |
| 2741 | { |
| 2742 | if (err == nullptr || U_FAILURE(*err)) |
| 2743 | { |
| 2744 | return; |
| 2745 | } |
| 2746 | if (len == nullptr || errChars == nullptr || converter == nullptr) |
| 2747 | { |
| 2748 | *err = U_ILLEGAL_ARGUMENT_ERROR; |
| 2749 | return; |
| 2750 | } |
| 2751 | if (*len < converter->invalidUCharLength) |
| 2752 | { |
| 2753 | *err = U_INDEX_OUTOFBOUNDS_ERROR; |
| 2754 | return; |
| 2755 | } |
| 2756 | if ((*len = converter->invalidUCharLength) > 0) |
| 2757 | { |
| 2758 | u_memcpy (errChars, converter->invalidUCharBuffer, *len); |
| 2759 | } |
| 2760 | } |
| 2761 | |
| 2762 | #define SIG_MAX_LEN5 5 |
| 2763 | |
| 2764 | U_CAPIextern "C" const char* U_EXPORT2 |
| 2765 | ucnv_detectUnicodeSignature( const char* source, |
| 2766 | int32_t sourceLength, |
| 2767 | int32_t* signatureLength, |
| 2768 | UErrorCode* pErrorCode) { |
| 2769 | int32_t dummy; |
| 2770 | |
| 2771 | /* initial 0xa5 bytes: make sure that if we read <SIG_MAX_LEN |
| 2772 | * bytes we don't misdetect something |
| 2773 | */ |
| 2774 | char start[SIG_MAX_LEN5]={ '\xa5', '\xa5', '\xa5', '\xa5', '\xa5' }; |
| 2775 | int i = 0; |
| 2776 | |
| 2777 | if((pErrorCode==nullptr) || U_FAILURE(*pErrorCode)){ |
| 2778 | return nullptr; |
| 2779 | } |
| 2780 | |
| 2781 | if(source == nullptr || sourceLength < -1){ |
| 2782 | *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR; |
| 2783 | return nullptr; |
| 2784 | } |
| 2785 | |
| 2786 | if(signatureLength == nullptr) { |
| 2787 | signatureLength = &dummy; |
| 2788 | } |
| 2789 | |
| 2790 | if(sourceLength==-1){ |
| 2791 | sourceLength=(int32_t)uprv_strlen(source):: strlen(source); |
| 2792 | } |
| 2793 | |
| 2794 | |
| 2795 | while(i<sourceLength&& i<SIG_MAX_LEN5){ |
| 2796 | start[i]=source[i]; |
| 2797 | i++; |
| 2798 | } |
| 2799 | |
| 2800 | if(start[0] == '\xFE' && start[1] == '\xFF') { |
| 2801 | *signatureLength=2; |
| 2802 | return "UTF-16BE"; |
| 2803 | } else if(start[0] == '\xFF' && start[1] == '\xFE') { |
| 2804 | if(start[2] == '\x00' && start[3] =='\x00') { |
| 2805 | *signatureLength=4; |
| 2806 | return "UTF-32LE"; |
| 2807 | } else { |
| 2808 | *signatureLength=2; |
| 2809 | return "UTF-16LE"; |
| 2810 | } |
| 2811 | } else if(start[0] == '\xEF' && start[1] == '\xBB' && start[2] == '\xBF') { |
| 2812 | *signatureLength=3; |
| 2813 | return "UTF-8"; |
| 2814 | } else if(start[0] == '\x00' && start[1] == '\x00' && |
| 2815 | start[2] == '\xFE' && start[3]=='\xFF') { |
| 2816 | *signatureLength=4; |
| 2817 | return "UTF-32BE"; |
| 2818 | } else if(start[0] == '\x0E' && start[1] == '\xFE' && start[2] == '\xFF') { |
| 2819 | *signatureLength=3; |
| 2820 | return "SCSU"; |
| 2821 | } else if(start[0] == '\xFB' && start[1] == '\xEE' && start[2] == '\x28') { |
| 2822 | *signatureLength=3; |
| 2823 | return "BOCU-1"; |
| 2824 | } else if(start[0] == '\x2B' && start[1] == '\x2F' && start[2] == '\x76') { |
| 2825 | /* |
| 2826 | * UTF-7: Initial U+FEFF is encoded as +/v8 or +/v9 or +/v+ or +/v/ |
| 2827 | * depending on the second UTF-16 code unit. |
| 2828 | * Detect the entire, closed Unicode mode sequence +/v8- for only U+FEFF |
| 2829 | * if it occurs. |
| 2830 | * |
| 2831 | * So far we have +/v |
| 2832 | */ |
| 2833 | if(start[3] == '\x38' && start[4] == '\x2D') { |
| 2834 | /* 5 bytes +/v8- */ |
| 2835 | *signatureLength=5; |
| 2836 | return "UTF-7"; |
| 2837 | } else if(start[3] == '\x38' || start[3] == '\x39' || start[3] == '\x2B' || start[3] == '\x2F') { |
| 2838 | /* 4 bytes +/v8 or +/v9 or +/v+ or +/v/ */ |
| 2839 | *signatureLength=4; |
| 2840 | return "UTF-7"; |
| 2841 | } |
| 2842 | }else if(start[0]=='\xDD' && start[1]== '\x73'&& start[2]=='\x66' && start[3]=='\x73'){ |
| 2843 | *signatureLength=4; |
| 2844 | return "UTF-EBCDIC"; |
| 2845 | } |
| 2846 | |
| 2847 | |
| 2848 | /* no known Unicode signature byte sequence recognized */ |
| 2849 | *signatureLength=0; |
| 2850 | return nullptr; |
| 2851 | } |
| 2852 | |
| 2853 | U_CAPIextern "C" int32_t U_EXPORT2 |
| 2854 | ucnv_fromUCountPending(const UConverter* cnv, UErrorCode* status) |
| 2855 | { |
| 2856 | if(status == nullptr || U_FAILURE(*status)){ |
| 2857 | return -1; |
| 2858 | } |
| 2859 | if(cnv == nullptr){ |
| 2860 | *status = U_ILLEGAL_ARGUMENT_ERROR; |
| 2861 | return -1; |
| 2862 | } |
| 2863 | |
| 2864 | if(cnv->preFromUFirstCP >= 0){ |
| 2865 | return U16_LENGTH(cnv->preFromUFirstCP)((uint32_t)(cnv->preFromUFirstCP)<=0xffff ? 1 : 2)+cnv->preFromULength ; |
| 2866 | }else if(cnv->preFromULength < 0){ |
| 2867 | return -cnv->preFromULength ; |
| 2868 | }else if(cnv->fromUChar32 > 0){ |
| 2869 | return 1; |
| 2870 | } |
| 2871 | return 0; |
| 2872 | |
| 2873 | } |
| 2874 | |
| 2875 | U_CAPIextern "C" int32_t U_EXPORT2 |
| 2876 | ucnv_toUCountPending(const UConverter* cnv, UErrorCode* status){ |
| 2877 | |
| 2878 | if(status == nullptr || U_FAILURE(*status)){ |
| 2879 | return -1; |
| 2880 | } |
| 2881 | if(cnv == nullptr){ |
| 2882 | *status = U_ILLEGAL_ARGUMENT_ERROR; |
| 2883 | return -1; |
| 2884 | } |
| 2885 | |
| 2886 | if(cnv->preToULength > 0){ |
| 2887 | return cnv->preToULength ; |
| 2888 | }else if(cnv->preToULength < 0){ |
| 2889 | return -cnv->preToULength; |
| 2890 | }else if(cnv->toULength > 0){ |
| 2891 | return cnv->toULength; |
| 2892 | } |
| 2893 | return 0; |
| 2894 | } |
| 2895 | |
| 2896 | U_CAPIextern "C" UBool U_EXPORT2 |
| 2897 | ucnv_isFixedWidth(UConverter *cnv, UErrorCode *status){ |
| 2898 | if (U_FAILURE(*status)) { |
| 2899 | return false; |
| 2900 | } |
| 2901 | |
| 2902 | if (cnv == nullptr) { |
| 2903 | *status = U_ILLEGAL_ARGUMENT_ERROR; |
| 2904 | return false; |
| 2905 | } |
| 2906 | |
| 2907 | switch (ucnv_getType(cnv)) { |
| 2908 | case UCNV_SBCS: |
| 2909 | case UCNV_DBCS: |
| 2910 | case UCNV_UTF32_BigEndian: |
| 2911 | case UCNV_UTF32_LittleEndian: |
| 2912 | case UCNV_UTF32: |
| 2913 | case UCNV_US_ASCII: |
| 2914 | return true; |
| 2915 | default: |
| 2916 | return false; |
| 2917 | } |
| 2918 | } |
| 2919 | #endif |
| 2920 | |
| 2921 | /* |
| 2922 | * Hey, Emacs, please set the following: |
| 2923 | * |
| 2924 | * Local Variables: |
| 2925 | * indent-tabs-mode: nil |
| 2926 | * End: |
| 2927 | * |
| 2928 | */ |