1 /*
2 * Copyright (C) 2004, 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
3 * Copyright (C) 2006 Alexey Proskuryakov <ap@nypop.com>
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include "config.h"
28 #include "wtf/text/TextCodecICU.h"
29
30 #include <unicode/ucnv.h>
31 #include <unicode/ucnv_cb.h>
32 #include "wtf/Assertions.h"
33 #include "wtf/StringExtras.h"
34 #include "wtf/Threading.h"
35 #include "wtf/WTFThreadData.h"
36 #include "wtf/text/CString.h"
37 #include "wtf/text/StringBuilder.h"
38 #include "wtf/unicode/CharacterNames.h"
39
40 using std::min;
41
42 namespace WTF {
43
44 const size_t ConversionBufferSize = 16384;
45
~ICUConverterWrapper()46 ICUConverterWrapper::~ICUConverterWrapper()
47 {
48 if (converter)
49 ucnv_close(converter);
50 }
51
cachedConverterICU()52 static UConverter*& cachedConverterICU()
53 {
54 return wtfThreadData().cachedConverterICU().converter;
55 }
56
create(const TextEncoding & encoding,const void *)57 PassOwnPtr<TextCodec> TextCodecICU::create(const TextEncoding& encoding, const void*)
58 {
59 return adoptPtr(new TextCodecICU(encoding));
60 }
61
registerEncodingNames(EncodingNameRegistrar registrar)62 void TextCodecICU::registerEncodingNames(EncodingNameRegistrar registrar)
63 {
64 // We register Hebrew with logical ordering using a separate name.
65 // Otherwise, this would share the same canonical name as the
66 // visual ordering case, and then TextEncoding could not tell them
67 // apart; ICU treats these names as synonyms.
68 registrar("ISO-8859-8-I", "ISO-8859-8-I");
69
70 int32_t numEncodings = ucnv_countAvailable();
71 for (int32_t i = 0; i < numEncodings; ++i) {
72 const char* name = ucnv_getAvailableName(i);
73 UErrorCode error = U_ZERO_ERROR;
74 // Try MIME before trying IANA to pick up commonly used names like
75 // 'EUC-JP' instead of horrendously long names like
76 // 'Extended_UNIX_Code_Packed_Format_for_Japanese'.
77 const char* standardName = ucnv_getStandardName(name, "MIME", &error);
78 if (!U_SUCCESS(error) || !standardName) {
79 error = U_ZERO_ERROR;
80 // Try IANA to pick up 'windows-12xx' and other names
81 // which are not preferred MIME names but are widely used.
82 standardName = ucnv_getStandardName(name, "IANA", &error);
83 if (!U_SUCCESS(error) || !standardName)
84 continue;
85 }
86
87 // A number of these aliases are handled in Chrome's copy of ICU, but
88 // Chromium can be compiled with the system ICU.
89
90 // 1. Treat GB2312 encoding as GBK (its more modern superset), to match other browsers.
91 // 2. On the Web, GB2312 is encoded as EUC-CN or HZ, while ICU provides a native encoding
92 // for encoding GB_2312-80 and several others. So, we need to override this behavior, too.
93 if (!strcmp(standardName, "GB2312") || !strcmp(standardName, "GB_2312-80"))
94 standardName = "GBK";
95 // Similarly, EUC-KR encodings all map to an extended version, but
96 // per HTML5, the canonical name still should be EUC-KR.
97 else if (!strcmp(standardName, "EUC-KR") || !strcmp(standardName, "KSC_5601") || !strcmp(standardName, "cp1363"))
98 standardName = "EUC-KR";
99 // And so on.
100 else if (!strcasecmp(standardName, "iso-8859-9")) // This name is returned in different case by ICU 3.2 and 3.6.
101 standardName = "windows-1254";
102 else if (!strcmp(standardName, "TIS-620"))
103 standardName = "windows-874";
104
105 registrar(standardName, standardName);
106
107 uint16_t numAliases = ucnv_countAliases(name, &error);
108 ASSERT(U_SUCCESS(error));
109 if (U_SUCCESS(error))
110 for (uint16_t j = 0; j < numAliases; ++j) {
111 error = U_ZERO_ERROR;
112 const char* alias = ucnv_getAlias(name, j, &error);
113 ASSERT(U_SUCCESS(error));
114 if (U_SUCCESS(error) && alias != standardName)
115 registrar(alias, standardName);
116 }
117 }
118
119 // Additional alias for MacCyrillic not present in ICU.
120 registrar("maccyrillic", "x-mac-cyrillic");
121
122 // Additional aliases that historically were present in the encoding
123 // table in WebKit on Macintosh that don't seem to be present in ICU.
124 // Perhaps we can prove these are not used on the web and remove them.
125 // Or perhaps we can get them added to ICU.
126 registrar("x-mac-roman", "macintosh");
127 registrar("x-mac-ukrainian", "x-mac-cyrillic");
128 registrar("cn-big5", "Big5");
129 registrar("x-x-big5", "Big5");
130 registrar("cn-gb", "GBK");
131 registrar("csgb231280", "GBK");
132 registrar("x-euc-cn", "GBK");
133 registrar("x-gbk", "GBK");
134 registrar("csISO88598I", "ISO-8859-8-I");
135 registrar("koi", "KOI8-R");
136 registrar("logical", "ISO-8859-8-I");
137 registrar("visual", "ISO-8859-8");
138 registrar("winarabic", "windows-1256");
139 registrar("winbaltic", "windows-1257");
140 registrar("wincyrillic", "windows-1251");
141 registrar("iso-8859-11", "windows-874");
142 registrar("iso8859-11", "windows-874");
143 registrar("dos-874", "windows-874");
144 registrar("wingreek", "windows-1253");
145 registrar("winhebrew", "windows-1255");
146 registrar("winlatin2", "windows-1250");
147 registrar("winturkish", "windows-1254");
148 registrar("winvietnamese", "windows-1258");
149 registrar("x-cp1250", "windows-1250");
150 registrar("x-cp1251", "windows-1251");
151 registrar("x-euc", "EUC-JP");
152 registrar("x-windows-949", "EUC-KR");
153 registrar("KSC5601", "EUC-KR");
154 registrar("x-uhc", "EUC-KR");
155 registrar("shift-jis", "Shift_JIS");
156
157 // Alternative spelling of ISO encoding names.
158 registrar("ISO8859-1", "ISO-8859-1");
159 registrar("ISO8859-2", "ISO-8859-2");
160 registrar("ISO8859-3", "ISO-8859-3");
161 registrar("ISO8859-4", "ISO-8859-4");
162 registrar("ISO8859-5", "ISO-8859-5");
163 registrar("ISO8859-6", "ISO-8859-6");
164 registrar("ISO8859-7", "ISO-8859-7");
165 registrar("ISO8859-8", "ISO-8859-8");
166 registrar("ISO8859-8-I", "ISO-8859-8-I");
167 registrar("ISO8859-9", "ISO-8859-9");
168 registrar("ISO8859-10", "ISO-8859-10");
169 registrar("ISO8859-13", "ISO-8859-13");
170 registrar("ISO8859-14", "ISO-8859-14");
171 registrar("ISO8859-15", "ISO-8859-15");
172 // No need to have an entry for ISO8859-16. ISO-8859-16 has just one label
173 // listed in WHATWG Encoding Living Standard (http://encoding.spec.whatwg.org/ ).
174
175 // Additional aliases present in the WHATWG Encoding Standard
176 // and Firefox (24), but not in ICU 4.6.
177 registrar("csiso58gb231280", "GBK");
178 registrar("csiso88596e", "ISO-8859-6");
179 registrar("csiso88596i", "ISO-8859-6");
180 registrar("csiso88598e", "ISO-8859-8");
181 registrar("gb_2312", "GBK");
182 registrar("iso88591", "windows-1252");
183 registrar("iso88592", "ISO-8859-2");
184 registrar("iso88593", "ISO-8859-3");
185 registrar("iso88594", "ISO-8859-4");
186 registrar("iso88595", "ISO-8859-5");
187 registrar("iso88596", "ISO-8859-6");
188 registrar("iso88597", "ISO-8859-7");
189 registrar("iso88598", "ISO-8859-8");
190 registrar("iso88599", "windows-1254");
191 registrar("iso885910", "ISO-8859-10");
192 registrar("iso885911", "windows-874");
193 registrar("iso885913", "ISO-8859-13");
194 registrar("iso885914", "ISO-8859-14");
195 registrar("iso885915", "ISO-8859-15");
196 registrar("iso_8859-1", "windows-1252");
197 registrar("iso_8859-2", "ISO-8859-2");
198 registrar("iso_8859-3", "ISO-8859-3");
199 registrar("iso_8859-4", "ISO-8859-4");
200 registrar("iso_8859-5", "ISO-8859-5");
201 registrar("iso_8859-6", "ISO-8859-6");
202 registrar("iso_8859-7", "ISO-8859-7");
203 registrar("iso_8859-8", "ISO-8859-8");
204 registrar("iso_8859-9", "windows-1254");
205 registrar("iso_8859-15", "ISO-8859-15");
206 registrar("koi8_r", "KOI8-R");
207 registrar("x-cp1252", "windows-1252");
208 registrar("x-cp1253", "windows-1253");
209 registrar("x-cp1254", "windows-1254");
210 registrar("x-cp1255", "windows-1255");
211 registrar("x-cp1256", "windows-1256");
212 registrar("x-cp1257", "windows-1257");
213 registrar("x-cp1258", "windows-1258");
214 }
215
registerCodecs(TextCodecRegistrar registrar)216 void TextCodecICU::registerCodecs(TextCodecRegistrar registrar)
217 {
218 // See comment above in registerEncodingNames.
219 registrar("ISO-8859-8-I", create, 0);
220
221 int32_t numEncodings = ucnv_countAvailable();
222 for (int32_t i = 0; i < numEncodings; ++i) {
223 const char* name = ucnv_getAvailableName(i);
224 UErrorCode error = U_ZERO_ERROR;
225 const char* standardName = ucnv_getStandardName(name, "MIME", &error);
226 if (!U_SUCCESS(error) || !standardName) {
227 error = U_ZERO_ERROR;
228 standardName = ucnv_getStandardName(name, "IANA", &error);
229 if (!U_SUCCESS(error) || !standardName)
230 continue;
231 }
232 registrar(standardName, create, 0);
233 }
234 }
235
TextCodecICU(const TextEncoding & encoding)236 TextCodecICU::TextCodecICU(const TextEncoding& encoding)
237 : m_encoding(encoding)
238 , m_converterICU(0)
239 , m_needsGBKFallbacks(false)
240 {
241 }
242
~TextCodecICU()243 TextCodecICU::~TextCodecICU()
244 {
245 releaseICUConverter();
246 }
247
releaseICUConverter() const248 void TextCodecICU::releaseICUConverter() const
249 {
250 if (m_converterICU) {
251 UConverter*& cachedConverter = cachedConverterICU();
252 if (cachedConverter)
253 ucnv_close(cachedConverter);
254 cachedConverter = m_converterICU;
255 m_converterICU = 0;
256 }
257 }
258
createICUConverter() const259 void TextCodecICU::createICUConverter() const
260 {
261 ASSERT(!m_converterICU);
262
263 const char* name = m_encoding.name();
264 m_needsGBKFallbacks = name[0] == 'G' && name[1] == 'B' && name[2] == 'K' && !name[3];
265
266 UErrorCode err;
267
268 UConverter*& cachedConverter = cachedConverterICU();
269 if (cachedConverter) {
270 err = U_ZERO_ERROR;
271 const char* cachedName = ucnv_getName(cachedConverter, &err);
272 if (U_SUCCESS(err) && m_encoding == cachedName) {
273 m_converterICU = cachedConverter;
274 cachedConverter = 0;
275 return;
276 }
277 }
278
279 err = U_ZERO_ERROR;
280 m_converterICU = ucnv_open(m_encoding.name(), &err);
281 #if !LOG_DISABLED
282 if (err == U_AMBIGUOUS_ALIAS_WARNING)
283 WTF_LOG_ERROR("ICU ambiguous alias warning for encoding: %s", m_encoding.name());
284 #endif
285 if (m_converterICU)
286 ucnv_setFallback(m_converterICU, TRUE);
287 }
288
decodeToBuffer(UChar * target,UChar * targetLimit,const char * & source,const char * sourceLimit,int32_t * offsets,bool flush,UErrorCode & err)289 int TextCodecICU::decodeToBuffer(UChar* target, UChar* targetLimit, const char*& source, const char* sourceLimit, int32_t* offsets, bool flush, UErrorCode& err)
290 {
291 UChar* targetStart = target;
292 err = U_ZERO_ERROR;
293 ucnv_toUnicode(m_converterICU, &target, targetLimit, &source, sourceLimit, offsets, flush, &err);
294 return target - targetStart;
295 }
296
297 class ErrorCallbackSetter {
298 public:
ErrorCallbackSetter(UConverter * converter,bool stopOnError)299 ErrorCallbackSetter(UConverter* converter, bool stopOnError)
300 : m_converter(converter)
301 , m_shouldStopOnEncodingErrors(stopOnError)
302 {
303 if (m_shouldStopOnEncodingErrors) {
304 UErrorCode err = U_ZERO_ERROR;
305 ucnv_setToUCallBack(m_converter, UCNV_TO_U_CALLBACK_SUBSTITUTE,
306 UCNV_SUB_STOP_ON_ILLEGAL, &m_savedAction,
307 &m_savedContext, &err);
308 ASSERT(err == U_ZERO_ERROR);
309 }
310 }
~ErrorCallbackSetter()311 ~ErrorCallbackSetter()
312 {
313 if (m_shouldStopOnEncodingErrors) {
314 UErrorCode err = U_ZERO_ERROR;
315 const void* oldContext;
316 UConverterToUCallback oldAction;
317 ucnv_setToUCallBack(m_converter, m_savedAction,
318 m_savedContext, &oldAction,
319 &oldContext, &err);
320 ASSERT(oldAction == UCNV_TO_U_CALLBACK_SUBSTITUTE);
321 ASSERT(!strcmp(static_cast<const char*>(oldContext), UCNV_SUB_STOP_ON_ILLEGAL));
322 ASSERT(err == U_ZERO_ERROR);
323 }
324 }
325
326 private:
327 UConverter* m_converter;
328 bool m_shouldStopOnEncodingErrors;
329 const void* m_savedContext;
330 UConverterToUCallback m_savedAction;
331 };
332
decode(const char * bytes,size_t length,FlushBehavior flush,bool stopOnError,bool & sawError)333 String TextCodecICU::decode(const char* bytes, size_t length, FlushBehavior flush, bool stopOnError, bool& sawError)
334 {
335 // Get a converter for the passed-in encoding.
336 if (!m_converterICU) {
337 createICUConverter();
338 ASSERT(m_converterICU);
339 if (!m_converterICU) {
340 WTF_LOG_ERROR("error creating ICU encoder even though encoding was in table");
341 return String();
342 }
343 }
344
345 ErrorCallbackSetter callbackSetter(m_converterICU, stopOnError);
346
347 StringBuilder result;
348
349 UChar buffer[ConversionBufferSize];
350 UChar* bufferLimit = buffer + ConversionBufferSize;
351 const char* source = reinterpret_cast<const char*>(bytes);
352 const char* sourceLimit = source + length;
353 int32_t* offsets = NULL;
354 UErrorCode err = U_ZERO_ERROR;
355
356 do {
357 int ucharsDecoded = decodeToBuffer(buffer, bufferLimit, source, sourceLimit, offsets, flush != DoNotFlush, err);
358 result.append(buffer, ucharsDecoded);
359 } while (err == U_BUFFER_OVERFLOW_ERROR);
360
361 if (U_FAILURE(err)) {
362 // flush the converter so it can be reused, and not be bothered by this error.
363 do {
364 decodeToBuffer(buffer, bufferLimit, source, sourceLimit, offsets, true, err);
365 } while (source < sourceLimit);
366 sawError = true;
367 }
368
369 String resultString = result.toString();
370
371 // <http://bugs.webkit.org/show_bug.cgi?id=17014>
372 // Simplified Chinese pages use the code A3A0 to mean "full-width space", but ICU decodes it as U+E5E5.
373 if (!strcmp(m_encoding.name(), "GBK") || !strcasecmp(m_encoding.name(), "gb18030"))
374 resultString.replace(0xE5E5, ideographicSpace);
375
376 return resultString;
377 }
378
379 // We need to apply these fallbacks ourselves as they are not currently supported by ICU and
380 // they were provided by the old TEC encoding path. Needed to fix <rdar://problem/4708689>.
fallbackForGBK(UChar32 character)381 static UChar fallbackForGBK(UChar32 character)
382 {
383 switch (character) {
384 case 0x01F9:
385 return 0xE7C8;
386 case 0x1E3F:
387 return 0xE7C7;
388 case 0x22EF:
389 return 0x2026;
390 case 0x301C:
391 return 0xFF5E;
392 }
393 return 0;
394 }
395
396 // Invalid character handler when writing escaped entities for unrepresentable
397 // characters. See the declaration of TextCodec::encode for more.
urlEscapedEntityCallback(const void * context,UConverterFromUnicodeArgs * fromUArgs,const UChar * codeUnits,int32_t length,UChar32 codePoint,UConverterCallbackReason reason,UErrorCode * err)398 static void urlEscapedEntityCallback(const void* context, UConverterFromUnicodeArgs* fromUArgs, const UChar* codeUnits, int32_t length,
399 UChar32 codePoint, UConverterCallbackReason reason, UErrorCode* err)
400 {
401 if (reason == UCNV_UNASSIGNED) {
402 *err = U_ZERO_ERROR;
403
404 UnencodableReplacementArray entity;
405 int entityLen = TextCodec::getUnencodableReplacement(codePoint, URLEncodedEntitiesForUnencodables, entity);
406 ucnv_cbFromUWriteBytes(fromUArgs, entity, entityLen, 0, err);
407 } else
408 UCNV_FROM_U_CALLBACK_ESCAPE(context, fromUArgs, codeUnits, length, codePoint, reason, err);
409 }
410
411 // Substitutes special GBK characters, escaping all other unassigned entities.
gbkCallbackEscape(const void * context,UConverterFromUnicodeArgs * fromUArgs,const UChar * codeUnits,int32_t length,UChar32 codePoint,UConverterCallbackReason reason,UErrorCode * err)412 static void gbkCallbackEscape(const void* context, UConverterFromUnicodeArgs* fromUArgs, const UChar* codeUnits, int32_t length,
413 UChar32 codePoint, UConverterCallbackReason reason, UErrorCode* err)
414 {
415 UChar outChar;
416 if (reason == UCNV_UNASSIGNED && (outChar = fallbackForGBK(codePoint))) {
417 const UChar* source = &outChar;
418 *err = U_ZERO_ERROR;
419 ucnv_cbFromUWriteUChars(fromUArgs, &source, source + 1, 0, err);
420 return;
421 }
422 UCNV_FROM_U_CALLBACK_ESCAPE(context, fromUArgs, codeUnits, length, codePoint, reason, err);
423 }
424
425 // Combines both gbkUrlEscapedEntityCallback and GBK character substitution.
gbkUrlEscapedEntityCallack(const void * context,UConverterFromUnicodeArgs * fromUArgs,const UChar * codeUnits,int32_t length,UChar32 codePoint,UConverterCallbackReason reason,UErrorCode * err)426 static void gbkUrlEscapedEntityCallack(const void* context, UConverterFromUnicodeArgs* fromUArgs, const UChar* codeUnits, int32_t length,
427 UChar32 codePoint, UConverterCallbackReason reason, UErrorCode* err)
428 {
429 if (reason == UCNV_UNASSIGNED) {
430 if (UChar outChar = fallbackForGBK(codePoint)) {
431 const UChar* source = &outChar;
432 *err = U_ZERO_ERROR;
433 ucnv_cbFromUWriteUChars(fromUArgs, &source, source + 1, 0, err);
434 return;
435 }
436 urlEscapedEntityCallback(context, fromUArgs, codeUnits, length, codePoint, reason, err);
437 return;
438 }
439 UCNV_FROM_U_CALLBACK_ESCAPE(context, fromUArgs, codeUnits, length, codePoint, reason, err);
440 }
441
gbkCallbackSubstitute(const void * context,UConverterFromUnicodeArgs * fromUArgs,const UChar * codeUnits,int32_t length,UChar32 codePoint,UConverterCallbackReason reason,UErrorCode * err)442 static void gbkCallbackSubstitute(const void* context, UConverterFromUnicodeArgs* fromUArgs, const UChar* codeUnits, int32_t length,
443 UChar32 codePoint, UConverterCallbackReason reason, UErrorCode* err)
444 {
445 UChar outChar;
446 if (reason == UCNV_UNASSIGNED && (outChar = fallbackForGBK(codePoint))) {
447 const UChar* source = &outChar;
448 *err = U_ZERO_ERROR;
449 ucnv_cbFromUWriteUChars(fromUArgs, &source, source + 1, 0, err);
450 return;
451 }
452 UCNV_FROM_U_CALLBACK_SUBSTITUTE(context, fromUArgs, codeUnits, length, codePoint, reason, err);
453 }
454
455 class TextCodecInput {
456 public:
TextCodecInput(const TextEncoding & encoding,const UChar * characters,size_t length)457 TextCodecInput(const TextEncoding& encoding, const UChar* characters, size_t length)
458 : m_begin(characters)
459 , m_end(characters + length)
460 { }
461
TextCodecInput(const TextEncoding & encoding,const LChar * characters,size_t length)462 TextCodecInput(const TextEncoding& encoding, const LChar* characters, size_t length)
463 {
464 m_buffer.reserveInitialCapacity(length);
465 for (size_t i = 0; i < length; ++i)
466 m_buffer.append(characters[i]);
467 m_begin = m_buffer.data();
468 m_end = m_begin + m_buffer.size();
469 }
470
begin() const471 const UChar* begin() const { return m_begin; }
end() const472 const UChar* end() const { return m_end; }
473
474 private:
475 const UChar* m_begin;
476 const UChar* m_end;
477 Vector<UChar> m_buffer;
478 };
479
encodeInternal(const TextCodecInput & input,UnencodableHandling handling)480 CString TextCodecICU::encodeInternal(const TextCodecInput& input, UnencodableHandling handling)
481 {
482 const UChar* source = input.begin();
483 const UChar* end = input.end();
484
485 UErrorCode err = U_ZERO_ERROR;
486
487 switch (handling) {
488 case QuestionMarksForUnencodables:
489 ucnv_setSubstChars(m_converterICU, "?", 1, &err);
490 ucnv_setFromUCallBack(m_converterICU, m_needsGBKFallbacks ? gbkCallbackSubstitute : UCNV_FROM_U_CALLBACK_SUBSTITUTE, 0, 0, 0, &err);
491 break;
492 case EntitiesForUnencodables:
493 ucnv_setFromUCallBack(m_converterICU, m_needsGBKFallbacks ? gbkCallbackEscape : UCNV_FROM_U_CALLBACK_ESCAPE, UCNV_ESCAPE_XML_DEC, 0, 0, &err);
494 break;
495 case URLEncodedEntitiesForUnencodables:
496 ucnv_setFromUCallBack(m_converterICU, m_needsGBKFallbacks ? gbkUrlEscapedEntityCallack : urlEscapedEntityCallback, 0, 0, 0, &err);
497 break;
498 }
499
500 ASSERT(U_SUCCESS(err));
501 if (U_FAILURE(err))
502 return CString();
503
504 Vector<char> result;
505 size_t size = 0;
506 do {
507 char buffer[ConversionBufferSize];
508 char* target = buffer;
509 char* targetLimit = target + ConversionBufferSize;
510 err = U_ZERO_ERROR;
511 ucnv_fromUnicode(m_converterICU, &target, targetLimit, &source, end, 0, true, &err);
512 size_t count = target - buffer;
513 result.grow(size + count);
514 memcpy(result.data() + size, buffer, count);
515 size += count;
516 } while (err == U_BUFFER_OVERFLOW_ERROR);
517
518 return CString(result.data(), size);
519 }
520
521 template<typename CharType>
encodeCommon(const CharType * characters,size_t length,UnencodableHandling handling)522 CString TextCodecICU::encodeCommon(const CharType* characters, size_t length, UnencodableHandling handling)
523 {
524 if (!length)
525 return "";
526
527 if (!m_converterICU)
528 createICUConverter();
529 if (!m_converterICU)
530 return CString();
531
532 TextCodecInput input(m_encoding, characters, length);
533 return encodeInternal(input, handling);
534 }
535
encode(const UChar * characters,size_t length,UnencodableHandling handling)536 CString TextCodecICU::encode(const UChar* characters, size_t length, UnencodableHandling handling)
537 {
538 return encodeCommon(characters, length, handling);
539 }
540
encode(const LChar * characters,size_t length,UnencodableHandling handling)541 CString TextCodecICU::encode(const LChar* characters, size_t length, UnencodableHandling handling)
542 {
543 return encodeCommon(characters, length, handling);
544 }
545
546 } // namespace WTF
547