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comparison: intl/icu/source/common/ucol_swp.cpp

intl/icu/source/common/ucol_swp.cpp

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1 /*
2 *******************************************************************************
3 *
4 * Copyright (C) 2003-2012, International Business Machines
5 * Corporation and others. All Rights Reserved.
6 *
7 *******************************************************************************
8 * file name: ucol_swp.cpp
9 * encoding: US-ASCII
10 * tab size: 8 (not used)
11 * indentation:4
12 *
13 * created on: 2003sep10
14 * created by: Markus W. Scherer
15 *
16 * Swap collation binaries.
17 */
18
19 #include "unicode/udata.h" /* UDataInfo */
20 #include "utrie.h"
21 #include "udataswp.h"
22 #include "cmemory.h"
23 #include "ucol_data.h"
24 #include "ucol_swp.h"
25
26 /* swapping ----------------------------------------------------------------- */
27
28 /*
29 * This performs data swapping for a folded trie (see utrie.c for details).
30 */
31
32 U_CAPI int32_t U_EXPORT2
33 utrie_swap(const UDataSwapper *ds,
34 const void *inData, int32_t length, void *outData,
35 UErrorCode *pErrorCode) {
36 const UTrieHeader *inTrie;
37 UTrieHeader trie;
38 int32_t size;
39 UBool dataIs32;
40
41 if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
42 return 0;
43 }
44 if(ds==NULL || inData==NULL || (length>=0 && outData==NULL)) {
45 *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
46 return 0;
47 }
48
49 /* setup and swapping */
50 if(length>=0 && (uint32_t)length<sizeof(UTrieHeader)) {
51 *pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR;
52 return 0;
53 }
54
55 inTrie=(const UTrieHeader *)inData;
56 trie.signature=ds->readUInt32(inTrie->signature);
57 trie.options=ds->readUInt32(inTrie->options);
58 trie.indexLength=udata_readInt32(ds, inTrie->indexLength);
59 trie.dataLength=udata_readInt32(ds, inTrie->dataLength);
60
61 if( trie.signature!=0x54726965 ||
62 (trie.options&UTRIE_OPTIONS_SHIFT_MASK)!=UTRIE_SHIFT ||
63 ((trie.options>>UTRIE_OPTIONS_INDEX_SHIFT)&UTRIE_OPTIONS_SHIFT_MASK)!=UTRIE_INDEX_SHIFT ||
64 trie.indexLength<UTRIE_BMP_INDEX_LENGTH ||
65 (trie.indexLength&(UTRIE_SURROGATE_BLOCK_COUNT-1))!=0 ||
66 trie.dataLength<UTRIE_DATA_BLOCK_LENGTH ||
67 (trie.dataLength&(UTRIE_DATA_GRANULARITY-1))!=0 ||
68 ((trie.options&UTRIE_OPTIONS_LATIN1_IS_LINEAR)!=0 && trie.dataLength<(UTRIE_DATA_BLOCK_LENGTH+0x100))
69 ) {
70 *pErrorCode=U_INVALID_FORMAT_ERROR; /* not a UTrie */
71 return 0;
72 }
73
74 dataIs32=(UBool)((trie.options&UTRIE_OPTIONS_DATA_IS_32_BIT)!=0);
75 size=sizeof(UTrieHeader)+trie.indexLength*2+trie.dataLength*(dataIs32?4:2);
76
77 if(length>=0) {
78 UTrieHeader *outTrie;
79
80 if(length<size) {
81 *pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR;
82 return 0;
83 }
84
85 outTrie=(UTrieHeader *)outData;
86
87 /* swap the header */
88 ds->swapArray32(ds, inTrie, sizeof(UTrieHeader), outTrie, pErrorCode);
89
90 /* swap the index and the data */
91 if(dataIs32) {
92 ds->swapArray16(ds, inTrie+1, trie.indexLength*2, outTrie+1, pErrorCode);
93 ds->swapArray32(ds, (const uint16_t *)(inTrie+1)+trie.indexLength, trie.dataLength*4,
94 (uint16_t *)(outTrie+1)+trie.indexLength, pErrorCode);
95 } else {
96 ds->swapArray16(ds, inTrie+1, (trie.indexLength+trie.dataLength)*2, outTrie+1, pErrorCode);
97 }
98 }
99
100 return size;
101 }
102
103 #if !UCONFIG_NO_COLLATION
104
105 /* Modified copy of the beginning of ucol_swapBinary(). */
106 U_CAPI UBool U_EXPORT2
107 ucol_looksLikeCollationBinary(const UDataSwapper *ds,
108 const void *inData, int32_t length) {
109 const UCATableHeader *inHeader;
110 UCATableHeader header;
111
112 if(ds==NULL || inData==NULL || length<-1) {
113 return FALSE;
114 }
115
116 inHeader=(const UCATableHeader *)inData;
117
118 /*
119 * The collation binary must contain at least the UCATableHeader,
120 * starting with its size field.
121 * sizeof(UCATableHeader)==42*4 in ICU 2.8
122 * check the length against the header size before reading the size field
123 */
124 uprv_memset(&header, 0, sizeof(header));
125 if(length<0) {
126 header.size=udata_readInt32(ds, inHeader->size);
127 } else if((length<(42*4) || length<(header.size=udata_readInt32(ds, inHeader->size)))) {
128 return FALSE;
129 }
130
131 header.magic=ds->readUInt32(inHeader->magic);
132 if(!(
133 header.magic==UCOL_HEADER_MAGIC &&
134 inHeader->formatVersion[0]==3 /*&&
135 inHeader->formatVersion[1]>=0*/
136 )) {
137 return FALSE;
138 }
139
140 if(inHeader->isBigEndian!=ds->inIsBigEndian || inHeader->charSetFamily!=ds->inCharset) {
141 return FALSE;
142 }
143
144 return TRUE;
145 }
146
147 /* swap a header-less collation binary, inside a resource bundle or ucadata.icu */
148 U_CAPI int32_t U_EXPORT2
149 ucol_swapBinary(const UDataSwapper *ds,
150 const void *inData, int32_t length, void *outData,
151 UErrorCode *pErrorCode) {
152 const uint8_t *inBytes;
153 uint8_t *outBytes;
154
155 const UCATableHeader *inHeader;
156 UCATableHeader *outHeader;
157 UCATableHeader header;
158
159 uint32_t count;
160
161 /* argument checking in case we were not called from ucol_swap() */
162 if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
163 return 0;
164 }
165 if(ds==NULL || inData==NULL || length<-1 || (length>0 && outData==NULL)) {
166 *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
167 return 0;
168 }
169
170 inBytes=(const uint8_t *)inData;
171 outBytes=(uint8_t *)outData;
172
173 inHeader=(const UCATableHeader *)inData;
174 outHeader=(UCATableHeader *)outData;
175
176 /*
177 * The collation binary must contain at least the UCATableHeader,
178 * starting with its size field.
179 * sizeof(UCATableHeader)==42*4 in ICU 2.8
180 * check the length against the header size before reading the size field
181 */
182 uprv_memset(&header, 0, sizeof(header));
183 if(length<0) {
184 header.size=udata_readInt32(ds, inHeader->size);
185 } else if((length<(42*4) || length<(header.size=udata_readInt32(ds, inHeader->size)))) {
186 udata_printError(ds, "ucol_swapBinary(): too few bytes (%d after header) for collation data\n",
187 length);
188 *pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR;
189 return 0;
190 }
191
192 header.magic=ds->readUInt32(inHeader->magic);
193 if(!(
194 header.magic==UCOL_HEADER_MAGIC &&
195 inHeader->formatVersion[0]==3 /*&&
196 inHeader->formatVersion[1]>=0*/
197 )) {
198 udata_printError(ds, "ucol_swapBinary(): magic 0x%08x or format version %02x.%02x is not a collation binary\n",
199 header.magic,
200 inHeader->formatVersion[0], inHeader->formatVersion[1]);
201 *pErrorCode=U_UNSUPPORTED_ERROR;
202 return 0;
203 }
204
205 if(inHeader->isBigEndian!=ds->inIsBigEndian || inHeader->charSetFamily!=ds->inCharset) {
206 udata_printError(ds, "ucol_swapBinary(): endianness %d or charset %d does not match the swapper\n",
207 inHeader->isBigEndian, inHeader->charSetFamily);
208 *pErrorCode=U_INVALID_FORMAT_ERROR;
209 return 0;
210 }
211
212 if(length>=0) {
213 /* copy everything, takes care of data that needs no swapping */
214 if(inBytes!=outBytes) {
215 uprv_memcpy(outBytes, inBytes, header.size);
216 }
217
218 /* swap the necessary pieces in the order of their occurrence in the data */
219
220 /* read more of the UCATableHeader (the size field was read above) */
221 header.options= ds->readUInt32(inHeader->options);
222 header.UCAConsts= ds->readUInt32(inHeader->UCAConsts);
223 header.contractionUCACombos= ds->readUInt32(inHeader->contractionUCACombos);
224 header.mappingPosition= ds->readUInt32(inHeader->mappingPosition);
225 header.expansion= ds->readUInt32(inHeader->expansion);
226 header.contractionIndex= ds->readUInt32(inHeader->contractionIndex);
227 header.contractionCEs= ds->readUInt32(inHeader->contractionCEs);
228 header.contractionSize= ds->readUInt32(inHeader->contractionSize);
229 header.endExpansionCE= ds->readUInt32(inHeader->endExpansionCE);
230 header.expansionCESize= ds->readUInt32(inHeader->expansionCESize);
231 header.endExpansionCECount= udata_readInt32(ds, inHeader->endExpansionCECount);
232 header.contractionUCACombosSize=udata_readInt32(ds, inHeader->contractionUCACombosSize);
233 header.scriptToLeadByte= ds->readUInt32(inHeader->scriptToLeadByte);
234 header.leadByteToScript= ds->readUInt32(inHeader->leadByteToScript);
235
236 /* swap the 32-bit integers in the header */
237 ds->swapArray32(ds, inHeader, (int32_t)((const char *)&inHeader->jamoSpecial-(const char *)inHeader),
238 outHeader, pErrorCode);
239 ds->swapArray32(ds, &(inHeader->scriptToLeadByte), sizeof(header.scriptToLeadByte) + sizeof(header.leadByteToScript),
240 &(outHeader->scriptToLeadByte), pErrorCode);
241 /* set the output platform properties */
242 outHeader->isBigEndian=ds->outIsBigEndian;
243 outHeader->charSetFamily=ds->outCharset;
244
245 /* swap the options */
246 if(header.options!=0) {
247 ds->swapArray32(ds, inBytes+header.options, header.expansion-header.options,
248 outBytes+header.options, pErrorCode);
249 }
250
251 /* swap the expansions */
252 if(header.mappingPosition!=0 && header.expansion!=0) {
253 if(header.contractionIndex!=0) {
254 /* expansions bounded by contractions */
255 count=header.contractionIndex-header.expansion;
256 } else {
257 /* no contractions: expansions bounded by the main trie */
258 count=header.mappingPosition-header.expansion;
259 }
260 ds->swapArray32(ds, inBytes+header.expansion, (int32_t)count,
261 outBytes+header.expansion, pErrorCode);
262 }
263
264 /* swap the contractions */
265 if(header.contractionSize!=0) {
266 /* contractionIndex: UChar[] */
267 ds->swapArray16(ds, inBytes+header.contractionIndex, header.contractionSize*2,
268 outBytes+header.contractionIndex, pErrorCode);
269
270 /* contractionCEs: CEs[] */
271 ds->swapArray32(ds, inBytes+header.contractionCEs, header.contractionSize*4,
272 outBytes+header.contractionCEs, pErrorCode);
273 }
274
275 /* swap the main trie */
276 if(header.mappingPosition!=0) {
277 count=header.endExpansionCE-header.mappingPosition;
278 utrie_swap(ds, inBytes+header.mappingPosition, (int32_t)count,
279 outBytes+header.mappingPosition, pErrorCode);
280 }
281
282 /* swap the max expansion table */
283 if(header.endExpansionCECount!=0) {
284 ds->swapArray32(ds, inBytes+header.endExpansionCE, header.endExpansionCECount*4,
285 outBytes+header.endExpansionCE, pErrorCode);
286 }
287
288 /* expansionCESize, unsafeCP, contrEndCP: uint8_t[], no need to swap */
289
290 /* swap UCA constants */
291 if(header.UCAConsts!=0) {
292 /*
293 * if UCAConsts!=0 then contractionUCACombos because we are swapping
294 * the UCA data file, and we know that the UCA contains contractions
295 */
296 count=header.contractionUCACombos-header.UCAConsts;
297 ds->swapArray32(ds, inBytes+header.UCAConsts, header.contractionUCACombos-header.UCAConsts,
298 outBytes+header.UCAConsts, pErrorCode);
299 }
300
301 /* swap UCA contractions */
302 if(header.contractionUCACombosSize!=0) {
303 count=header.contractionUCACombosSize*inHeader->contractionUCACombosWidth*U_SIZEOF_UCHAR;
304 ds->swapArray16(ds, inBytes+header.contractionUCACombos, (int32_t)count,
305 outBytes+header.contractionUCACombos, pErrorCode);
306 }
307
308 /* swap the script to lead bytes */
309 if(header.scriptToLeadByte!=0) {
310 int indexCount = ds->readUInt16(*((uint16_t*)(inBytes+header.scriptToLeadByte))); // each entry = 2 * uint16
311 int dataCount = ds->readUInt16(*((uint16_t*)(inBytes+header.scriptToLeadByte + 2))); // each entry = uint16
312 ds->swapArray16(ds, inBytes+header.scriptToLeadByte,
313 4 + (4 * indexCount) + (2 * dataCount),
314 outBytes+header.scriptToLeadByte, pErrorCode);
315 }
316
317 /* swap the lead byte to scripts */
318 if(header.leadByteToScript!=0) {
319 int indexCount = ds->readUInt16(*((uint16_t*)(inBytes+header.leadByteToScript))); // each entry = uint16
320 int dataCount = ds->readUInt16(*((uint16_t*)(inBytes+header.leadByteToScript + 2))); // each entry = uint16
321 ds->swapArray16(ds, inBytes+header.leadByteToScript,
322 4 + (2 * indexCount) + (2 * dataCount),
323 outBytes+header.leadByteToScript, pErrorCode);
324 }
325 }
326
327 return header.size;
328 }
329
330 /* swap ICU collation data like ucadata.icu */
331 U_CAPI int32_t U_EXPORT2
332 ucol_swap(const UDataSwapper *ds,
333 const void *inData, int32_t length, void *outData,
334 UErrorCode *pErrorCode) {
335
336 const UDataInfo *pInfo;
337 int32_t headerSize, collationSize;
338
339 /* udata_swapDataHeader checks the arguments */
340 headerSize=udata_swapDataHeader(ds, inData, length, outData, pErrorCode);
341 if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
342 return 0;
343 }
344
345 /* check data format and format version */
346 pInfo=(const UDataInfo *)((const char *)inData+4);
347 if(!(
348 pInfo->dataFormat[0]==0x55 && /* dataFormat="UCol" */
349 pInfo->dataFormat[1]==0x43 &&
350 pInfo->dataFormat[2]==0x6f &&
351 pInfo->dataFormat[3]==0x6c &&
352 pInfo->formatVersion[0]==3 /*&&
353 pInfo->formatVersion[1]>=0*/
354 )) {
355 udata_printError(ds, "ucol_swap(): data format %02x.%02x.%02x.%02x (format version %02x.%02x) is not a collation file\n",
356 pInfo->dataFormat[0], pInfo->dataFormat[1],
357 pInfo->dataFormat[2], pInfo->dataFormat[3],
358 pInfo->formatVersion[0], pInfo->formatVersion[1]);
359 *pErrorCode=U_UNSUPPORTED_ERROR;
360 return 0;
361 }
362
363 collationSize=ucol_swapBinary(ds,
364 (const char *)inData+headerSize,
365 length>=0 ? length-headerSize : -1,
366 (char *)outData+headerSize,
367 pErrorCode);
368 if(U_SUCCESS(*pErrorCode)) {
369 return headerSize+collationSize;
370 } else {
371 return 0;
372 }
373 }
374
375 /* swap inverse UCA collation data (invuca.icu) */
376 U_CAPI int32_t U_EXPORT2
377 ucol_swapInverseUCA(const UDataSwapper *ds,
378 const void *inData, int32_t length, void *outData,
379 UErrorCode *pErrorCode) {
380 const UDataInfo *pInfo;
381 int32_t headerSize;
382
383 const uint8_t *inBytes;
384 uint8_t *outBytes;
385
386 const InverseUCATableHeader *inHeader;
387 InverseUCATableHeader *outHeader;
388 InverseUCATableHeader header={ 0,0,0,0,0,{0,0,0,0},{0,0,0,0,0,0,0,0} };
389
390 /* udata_swapDataHeader checks the arguments */
391 headerSize=udata_swapDataHeader(ds, inData, length, outData, pErrorCode);
392 if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
393 return 0;
394 }
395
396 /* check data format and format version */
397 pInfo=(const UDataInfo *)((const char *)inData+4);
398 if(!(
399 pInfo->dataFormat[0]==0x49 && /* dataFormat="InvC" */
400 pInfo->dataFormat[1]==0x6e &&
401 pInfo->dataFormat[2]==0x76 &&
402 pInfo->dataFormat[3]==0x43 &&
403 pInfo->formatVersion[0]==2 &&
404 pInfo->formatVersion[1]>=1
405 )) {
406 udata_printError(ds, "ucol_swapInverseUCA(): data format %02x.%02x.%02x.%02x (format version %02x.%02x) is not an inverse UCA collation file\n",
407 pInfo->dataFormat[0], pInfo->dataFormat[1],
408 pInfo->dataFormat[2], pInfo->dataFormat[3],
409 pInfo->formatVersion[0], pInfo->formatVersion[1]);
410 *pErrorCode=U_UNSUPPORTED_ERROR;
411 return 0;
412 }
413
414 inBytes=(const uint8_t *)inData+headerSize;
415 outBytes=(uint8_t *)outData+headerSize;
416
417 inHeader=(const InverseUCATableHeader *)inBytes;
418 outHeader=(InverseUCATableHeader *)outBytes;
419
420 /*
421 * The inverse UCA collation binary must contain at least the InverseUCATableHeader,
422 * starting with its size field.
423 * sizeof(UCATableHeader)==8*4 in ICU 2.8
424 * check the length against the header size before reading the size field
425 */
426 if(length<0) {
427 header.byteSize=udata_readInt32(ds, inHeader->byteSize);
428 } else if(
429 ((length-headerSize)<(8*4) ||
430 (uint32_t)(length-headerSize)<(header.byteSize=udata_readInt32(ds, inHeader->byteSize)))
431 ) {
432 udata_printError(ds, "ucol_swapInverseUCA(): too few bytes (%d after header) for inverse UCA collation data\n",
433 length);
434 *pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR;
435 return 0;
436 }
437
438 if(length>=0) {
439 /* copy everything, takes care of data that needs no swapping */
440 if(inBytes!=outBytes) {
441 uprv_memcpy(outBytes, inBytes, header.byteSize);
442 }
443
444 /* swap the necessary pieces in the order of their occurrence in the data */
445
446 /* read more of the InverseUCATableHeader (the byteSize field was read above) */
447 header.tableSize= ds->readUInt32(inHeader->tableSize);
448 header.contsSize= ds->readUInt32(inHeader->contsSize);
449 header.table= ds->readUInt32(inHeader->table);
450 header.conts= ds->readUInt32(inHeader->conts);
451
452 /* swap the 32-bit integers in the header */
453 ds->swapArray32(ds, inHeader, 5*4, outHeader, pErrorCode);
454
455 /* swap the inverse table; tableSize counts uint32_t[3] rows */
456 ds->swapArray32(ds, inBytes+header.table, header.tableSize*3*4,
457 outBytes+header.table, pErrorCode);
458
459 /* swap the continuation table; contsSize counts UChars */
460 ds->swapArray16(ds, inBytes+header.conts, header.contsSize*U_SIZEOF_UCHAR,
461 outBytes+header.conts, pErrorCode);
462 }
463
464 return headerSize+header.byteSize;
465 }
466
467 #endif /* #if !UCONFIG_NO_COLLATION */

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