| File: | out/../deps/icu-small/source/common/ucnvscsu.cpp |
| Warning: | line 1504, column 9 Value stored to 'targetCapacity' is never read |
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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) 2000-2016, International Business Machines |
| 7 | * Corporation and others. All Rights Reserved. |
| 8 | * |
| 9 | ****************************************************************************** |
| 10 | * file name: ucnvscsu.c |
| 11 | * encoding: UTF-8 |
| 12 | * tab size: 8 (not used) |
| 13 | * indentation:4 |
| 14 | * |
| 15 | * created on: 2000nov18 |
| 16 | * created by: Markus W. Scherer |
| 17 | * |
| 18 | * This is an implementation of the Standard Compression Scheme for Unicode |
| 19 | * as defined in https://www.unicode.org/reports/tr6/ . |
| 20 | * Reserved commands and window settings are treated as illegal sequences and |
| 21 | * will result in callback calls. |
| 22 | */ |
| 23 | |
| 24 | #include "unicode/utypes.h" |
| 25 | |
| 26 | #if !UCONFIG_NO_CONVERSION0 && !UCONFIG_ONLY_HTML_CONVERSION0 |
| 27 | |
| 28 | #include "unicode/ucnv.h" |
| 29 | #include "unicode/ucnv_cb.h" |
| 30 | #include "unicode/utf16.h" |
| 31 | #include "ucnv_bld.h" |
| 32 | #include "ucnv_cnv.h" |
| 33 | #include "cmemory.h" |
| 34 | |
| 35 | /* SCSU definitions --------------------------------------------------------- */ |
| 36 | |
| 37 | /* SCSU command byte values */ |
| 38 | enum { |
| 39 | SQ0=0x01, /* Quote from window pair 0 */ |
| 40 | SQ7=0x08, /* Quote from window pair 7 */ |
| 41 | SDX=0x0B, /* Define a window as extended */ |
| 42 | Srs=0x0C, /* reserved */ |
| 43 | SQU=0x0E, /* Quote a single Unicode character */ |
| 44 | SCU=0x0F, /* Change to Unicode mode */ |
| 45 | SC0=0x10, /* Select window 0 */ |
| 46 | SC7=0x17, /* Select window 7 */ |
| 47 | SD0=0x18, /* Define and select window 0 */ |
| 48 | SD7=0x1F, /* Define and select window 7 */ |
| 49 | |
| 50 | UC0=0xE0, /* Select window 0 */ |
| 51 | UC7=0xE7, /* Select window 7 */ |
| 52 | UD0=0xE8, /* Define and select window 0 */ |
| 53 | UD7=0xEF, /* Define and select window 7 */ |
| 54 | UQU=0xF0, /* Quote a single Unicode character */ |
| 55 | UDX=0xF1, /* Define a Window as extended */ |
| 56 | Urs=0xF2 /* reserved */ |
| 57 | }; |
| 58 | |
| 59 | enum { |
| 60 | /* |
| 61 | * Unicode code points from 3400 to E000 are not adressible by |
| 62 | * dynamic window, since in these areas no short run alphabets are |
| 63 | * found. Therefore add gapOffset to all values from gapThreshold. |
| 64 | */ |
| 65 | gapThreshold=0x68, |
| 66 | gapOffset=0xAC00, |
| 67 | |
| 68 | /* values between reservedStart and fixedThreshold are reserved */ |
| 69 | reservedStart=0xA8, |
| 70 | |
| 71 | /* use table of predefined fixed offsets for values from fixedThreshold */ |
| 72 | fixedThreshold=0xF9 |
| 73 | }; |
| 74 | |
| 75 | /* constant offsets for the 8 static windows */ |
| 76 | static const uint32_t staticOffsets[8]={ |
| 77 | 0x0000, /* ASCII for quoted tags */ |
| 78 | 0x0080, /* Latin - 1 Supplement (for access to punctuation) */ |
| 79 | 0x0100, /* Latin Extended-A */ |
| 80 | 0x0300, /* Combining Diacritical Marks */ |
| 81 | 0x2000, /* General Punctuation */ |
| 82 | 0x2080, /* Currency Symbols */ |
| 83 | 0x2100, /* Letterlike Symbols and Number Forms */ |
| 84 | 0x3000 /* CJK Symbols and punctuation */ |
| 85 | }; |
| 86 | |
| 87 | /* initial offsets for the 8 dynamic (sliding) windows */ |
| 88 | static const uint32_t initialDynamicOffsets[8]={ |
| 89 | 0x0080, /* Latin-1 */ |
| 90 | 0x00C0, /* Latin Extended A */ |
| 91 | 0x0400, /* Cyrillic */ |
| 92 | 0x0600, /* Arabic */ |
| 93 | 0x0900, /* Devanagari */ |
| 94 | 0x3040, /* Hiragana */ |
| 95 | 0x30A0, /* Katakana */ |
| 96 | 0xFF00 /* Fullwidth ASCII */ |
| 97 | }; |
| 98 | |
| 99 | /* Table of fixed predefined Offsets */ |
| 100 | static const uint32_t fixedOffsets[]={ |
| 101 | /* 0xF9 */ 0x00C0, /* Latin-1 Letters + half of Latin Extended A */ |
| 102 | /* 0xFA */ 0x0250, /* IPA extensions */ |
| 103 | /* 0xFB */ 0x0370, /* Greek */ |
| 104 | /* 0xFC */ 0x0530, /* Armenian */ |
| 105 | /* 0xFD */ 0x3040, /* Hiragana */ |
| 106 | /* 0xFE */ 0x30A0, /* Katakana */ |
| 107 | /* 0xFF */ 0xFF60 /* Halfwidth Katakana */ |
| 108 | }; |
| 109 | |
| 110 | /* state values */ |
| 111 | enum { |
| 112 | readCommand, |
| 113 | quotePairOne, |
| 114 | quotePairTwo, |
| 115 | quoteOne, |
| 116 | definePairOne, |
| 117 | definePairTwo, |
| 118 | defineOne |
| 119 | }; |
| 120 | |
| 121 | typedef struct SCSUData { |
| 122 | /* dynamic window offsets, initialize to default values from initialDynamicOffsets */ |
| 123 | uint32_t toUDynamicOffsets[8]; |
| 124 | uint32_t fromUDynamicOffsets[8]; |
| 125 | |
| 126 | /* state machine state - toUnicode */ |
| 127 | UBool toUIsSingleByteMode; |
| 128 | uint8_t toUState; |
| 129 | int8_t toUQuoteWindow, toUDynamicWindow; |
| 130 | uint8_t toUByteOne; |
| 131 | uint8_t toUPadding[3]; |
| 132 | |
| 133 | /* state machine state - fromUnicode */ |
| 134 | UBool fromUIsSingleByteMode; |
| 135 | int8_t fromUDynamicWindow; |
| 136 | |
| 137 | /* |
| 138 | * windowUse[] keeps track of the use of the dynamic windows: |
| 139 | * At nextWindowUseIndex there is the least recently used window, |
| 140 | * and the following windows (in a wrapping manner) are more and more |
| 141 | * recently used. |
| 142 | * At nextWindowUseIndex-1 there is the most recently used window. |
| 143 | */ |
| 144 | uint8_t locale; |
| 145 | int8_t nextWindowUseIndex; |
| 146 | int8_t windowUse[8]; |
| 147 | } SCSUData; |
| 148 | |
| 149 | static const int8_t initialWindowUse[8]={ 7, 0, 3, 2, 4, 5, 6, 1 }; |
| 150 | static const int8_t initialWindowUse_ja[8]={ 3, 2, 4, 1, 0, 7, 5, 6 }; |
| 151 | |
| 152 | enum { |
| 153 | lGeneric, l_ja |
| 154 | }; |
| 155 | |
| 156 | /* SCSU setup functions ----------------------------------------------------- */ |
| 157 | U_CDECL_BEGINextern "C" { |
| 158 | static void U_CALLCONV |
| 159 | _SCSUReset(UConverter *cnv, UConverterResetChoice choice) { |
| 160 | SCSUData *scsu=(SCSUData *)cnv->extraInfo; |
| 161 | |
| 162 | if(choice<=UCNV_RESET_TO_UNICODE) { |
| 163 | /* reset toUnicode */ |
| 164 | uprv_memcpy(scsu->toUDynamicOffsets, initialDynamicOffsets, 32)do { clang diagnostic push
clang diagnostic ignored "-Waddress" (void)0; (void)0; clang diagnostic pop :: memcpy(scsu-> toUDynamicOffsets, initialDynamicOffsets, 32); } while (false ); |
| 165 | |
| 166 | scsu->toUIsSingleByteMode=TRUE1; |
| 167 | scsu->toUState=readCommand; |
| 168 | scsu->toUQuoteWindow=scsu->toUDynamicWindow=0; |
| 169 | scsu->toUByteOne=0; |
| 170 | |
| 171 | cnv->toULength=0; |
| 172 | } |
| 173 | if(choice!=UCNV_RESET_TO_UNICODE) { |
| 174 | /* reset fromUnicode */ |
| 175 | uprv_memcpy(scsu->fromUDynamicOffsets, initialDynamicOffsets, 32)do { clang diagnostic push
clang diagnostic ignored "-Waddress" (void)0; (void)0; clang diagnostic pop :: memcpy(scsu-> fromUDynamicOffsets, initialDynamicOffsets, 32); } while (false ); |
| 176 | |
| 177 | scsu->fromUIsSingleByteMode=TRUE1; |
| 178 | scsu->fromUDynamicWindow=0; |
| 179 | |
| 180 | scsu->nextWindowUseIndex=0; |
| 181 | switch(scsu->locale) { |
| 182 | case l_ja: |
| 183 | uprv_memcpy(scsu->windowUse, initialWindowUse_ja, 8)do { clang diagnostic push
clang diagnostic ignored "-Waddress" (void)0; (void)0; clang diagnostic pop :: memcpy(scsu-> windowUse, initialWindowUse_ja, 8); } while (false); |
| 184 | break; |
| 185 | default: |
| 186 | uprv_memcpy(scsu->windowUse, initialWindowUse, 8)do { clang diagnostic push
clang diagnostic ignored "-Waddress" (void)0; (void)0; clang diagnostic pop :: memcpy(scsu-> windowUse, initialWindowUse, 8); } while (false); |
| 187 | break; |
| 188 | } |
| 189 | |
| 190 | cnv->fromUChar32=0; |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | static void U_CALLCONV |
| 195 | _SCSUOpen(UConverter *cnv, |
| 196 | UConverterLoadArgs *pArgs, |
| 197 | UErrorCode *pErrorCode) { |
| 198 | const char *locale=pArgs->locale; |
| 199 | if(pArgs->onlyTestIsLoadable) { |
| 200 | return; |
| 201 | } |
| 202 | cnv->extraInfo=uprv_mallocuprv_malloc_71(sizeof(SCSUData)); |
| 203 | if(cnv->extraInfo!=NULL__null) { |
| 204 | if(locale!=NULL__null && locale[0]=='j' && locale[1]=='a' && (locale[2]==0 || locale[2]=='_')) { |
| 205 | ((SCSUData *)cnv->extraInfo)->locale=l_ja; |
| 206 | } else { |
| 207 | ((SCSUData *)cnv->extraInfo)->locale=lGeneric; |
| 208 | } |
| 209 | _SCSUReset(cnv, UCNV_RESET_BOTH); |
| 210 | } else { |
| 211 | *pErrorCode=U_MEMORY_ALLOCATION_ERROR; |
| 212 | } |
| 213 | |
| 214 | /* Set the substitution character U+fffd as a Unicode string. */ |
| 215 | cnv->subUChars[0]=0xfffd; |
| 216 | cnv->subCharLen=-1; |
| 217 | } |
| 218 | |
| 219 | static void U_CALLCONV |
| 220 | _SCSUClose(UConverter *cnv) { |
| 221 | if(cnv->extraInfo!=NULL__null) { |
| 222 | if(!cnv->isExtraLocal) { |
| 223 | uprv_freeuprv_free_71(cnv->extraInfo); |
| 224 | } |
| 225 | cnv->extraInfo=NULL__null; |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | /* SCSU-to-Unicode conversion functions ------------------------------------- */ |
| 230 | |
| 231 | static void U_CALLCONV |
| 232 | _SCSUToUnicodeWithOffsets(UConverterToUnicodeArgs *pArgs, |
| 233 | UErrorCode *pErrorCode) { |
| 234 | UConverter *cnv; |
| 235 | SCSUData *scsu; |
| 236 | const uint8_t *source, *sourceLimit; |
| 237 | UChar *target; |
| 238 | const UChar *targetLimit; |
| 239 | int32_t *offsets; |
| 240 | UBool isSingleByteMode; |
| 241 | uint8_t state, byteOne; |
| 242 | int8_t quoteWindow, dynamicWindow; |
| 243 | |
| 244 | int32_t sourceIndex, nextSourceIndex; |
| 245 | |
| 246 | uint8_t b; |
| 247 | |
| 248 | /* set up the local pointers */ |
| 249 | cnv=pArgs->converter; |
| 250 | scsu=(SCSUData *)cnv->extraInfo; |
| 251 | |
| 252 | source=(const uint8_t *)pArgs->source; |
| 253 | sourceLimit=(const uint8_t *)pArgs->sourceLimit; |
| 254 | target=pArgs->target; |
| 255 | targetLimit=pArgs->targetLimit; |
| 256 | offsets=pArgs->offsets; |
| 257 | |
| 258 | /* get the state machine state */ |
| 259 | isSingleByteMode=scsu->toUIsSingleByteMode; |
| 260 | state=scsu->toUState; |
| 261 | quoteWindow=scsu->toUQuoteWindow; |
| 262 | dynamicWindow=scsu->toUDynamicWindow; |
| 263 | byteOne=scsu->toUByteOne; |
| 264 | |
| 265 | /* sourceIndex=-1 if the current character began in the previous buffer */ |
| 266 | sourceIndex=state==readCommand ? 0 : -1; |
| 267 | nextSourceIndex=0; |
| 268 | |
| 269 | /* |
| 270 | * conversion "loop" |
| 271 | * |
| 272 | * For performance, this is not a normal C loop. |
| 273 | * Instead, there are two code blocks for the two SCSU modes. |
| 274 | * The function branches to either one, and a change of the mode is done with a goto to |
| 275 | * the other branch. |
| 276 | * |
| 277 | * Each branch has two conventional loops: |
| 278 | * - a fast-path loop for the most common codes in the mode |
| 279 | * - a loop for all other codes in the mode |
| 280 | * When the fast-path runs into a code that it cannot handle, its loop ends and it |
| 281 | * runs into the following loop to handle the other codes. |
| 282 | * The end of the input or output buffer is also handled by the slower loop. |
| 283 | * The slow loop jumps (goto) to the fast-path loop again as soon as possible. |
| 284 | * |
| 285 | * The callback handling is done by returning with an error code. |
| 286 | * The conversion framework actually calls the callback function. |
| 287 | */ |
| 288 | if(isSingleByteMode) { |
| 289 | /* fast path for single-byte mode */ |
| 290 | if(state==readCommand) { |
| 291 | fastSingle: |
| 292 | while(source<sourceLimit && target<targetLimit && (b=*source)>=0x20) { |
| 293 | ++source; |
| 294 | ++nextSourceIndex; |
| 295 | if(b<=0x7f) { |
| 296 | /* write US-ASCII graphic character or DEL */ |
| 297 | *target++=(UChar)b; |
| 298 | if(offsets!=NULL__null) { |
| 299 | *offsets++=sourceIndex; |
| 300 | } |
| 301 | } else { |
| 302 | /* write from dynamic window */ |
| 303 | uint32_t c=scsu->toUDynamicOffsets[dynamicWindow]+(b&0x7f); |
| 304 | if(c<=0xffff) { |
| 305 | *target++=(UChar)c; |
| 306 | if(offsets!=NULL__null) { |
| 307 | *offsets++=sourceIndex; |
| 308 | } |
| 309 | } else { |
| 310 | /* output surrogate pair */ |
| 311 | *target++=(UChar)(0xd7c0+(c>>10)); |
| 312 | if(target<targetLimit) { |
| 313 | *target++=(UChar)(0xdc00|(c&0x3ff)); |
| 314 | if(offsets!=NULL__null) { |
| 315 | *offsets++=sourceIndex; |
| 316 | *offsets++=sourceIndex; |
| 317 | } |
| 318 | } else { |
| 319 | /* target overflow */ |
| 320 | if(offsets!=NULL__null) { |
| 321 | *offsets++=sourceIndex; |
| 322 | } |
| 323 | cnv->UCharErrorBuffer[0]=(UChar)(0xdc00|(c&0x3ff)); |
| 324 | cnv->UCharErrorBufferLength=1; |
| 325 | *pErrorCode=U_BUFFER_OVERFLOW_ERROR; |
| 326 | goto endloop; |
| 327 | } |
| 328 | } |
| 329 | } |
| 330 | sourceIndex=nextSourceIndex; |
| 331 | } |
| 332 | } |
| 333 | |
| 334 | /* normal state machine for single-byte mode, minus handling for what fastSingle covers */ |
| 335 | singleByteMode: |
| 336 | while(source<sourceLimit) { |
| 337 | if(target>=targetLimit) { |
| 338 | /* target is full */ |
| 339 | *pErrorCode=U_BUFFER_OVERFLOW_ERROR; |
| 340 | break; |
| 341 | } |
| 342 | b=*source++; |
| 343 | ++nextSourceIndex; |
| 344 | switch(state) { |
| 345 | case readCommand: |
| 346 | /* redundant conditions are commented out */ |
| 347 | /* here: b<0x20 because otherwise we would be in fastSingle */ |
| 348 | if((1UL<<b)&0x2601 /* binary 0010 0110 0000 0001, check for b==0xd || b==0xa || b==9 || b==0 */) { |
| 349 | /* CR/LF/TAB/NUL */ |
| 350 | *target++=(UChar)b; |
| 351 | if(offsets!=NULL__null) { |
| 352 | *offsets++=sourceIndex; |
| 353 | } |
| 354 | sourceIndex=nextSourceIndex; |
| 355 | goto fastSingle; |
| 356 | } else if(SC0<=b) { |
| 357 | if(b<=SC7) { |
| 358 | dynamicWindow=(int8_t)(b-SC0); |
| 359 | sourceIndex=nextSourceIndex; |
| 360 | goto fastSingle; |
| 361 | } else /* if(SD0<=b && b<=SD7) */ { |
| 362 | dynamicWindow=(int8_t)(b-SD0); |
| 363 | state=defineOne; |
| 364 | } |
| 365 | } else if(/* SQ0<=b && */ b<=SQ7) { |
| 366 | quoteWindow=(int8_t)(b-SQ0); |
| 367 | state=quoteOne; |
| 368 | } else if(b==SDX) { |
| 369 | state=definePairOne; |
| 370 | } else if(b==SQU) { |
| 371 | state=quotePairOne; |
| 372 | } else if(b==SCU) { |
| 373 | sourceIndex=nextSourceIndex; |
| 374 | isSingleByteMode=FALSE0; |
| 375 | goto fastUnicode; |
| 376 | } else /* Srs */ { |
| 377 | /* callback(illegal) */ |
| 378 | *pErrorCode=U_ILLEGAL_CHAR_FOUND; |
| 379 | cnv->toUBytes[0]=b; |
| 380 | cnv->toULength=1; |
| 381 | goto endloop; |
| 382 | } |
| 383 | |
| 384 | /* store the first byte of a multibyte sequence in toUBytes[] */ |
| 385 | cnv->toUBytes[0]=b; |
| 386 | cnv->toULength=1; |
| 387 | break; |
| 388 | case quotePairOne: |
| 389 | byteOne=b; |
| 390 | cnv->toUBytes[1]=b; |
| 391 | cnv->toULength=2; |
| 392 | state=quotePairTwo; |
| 393 | break; |
| 394 | case quotePairTwo: |
| 395 | *target++=(UChar)((byteOne<<8)|b); |
| 396 | if(offsets!=NULL__null) { |
| 397 | *offsets++=sourceIndex; |
| 398 | } |
| 399 | sourceIndex=nextSourceIndex; |
| 400 | state=readCommand; |
| 401 | goto fastSingle; |
| 402 | case quoteOne: |
| 403 | if(b<0x80) { |
| 404 | /* all static offsets are in the BMP */ |
| 405 | *target++=(UChar)(staticOffsets[quoteWindow]+b); |
| 406 | if(offsets!=NULL__null) { |
| 407 | *offsets++=sourceIndex; |
| 408 | } |
| 409 | } else { |
| 410 | /* write from dynamic window */ |
| 411 | uint32_t c=scsu->toUDynamicOffsets[quoteWindow]+(b&0x7f); |
| 412 | if(c<=0xffff) { |
| 413 | *target++=(UChar)c; |
| 414 | if(offsets!=NULL__null) { |
| 415 | *offsets++=sourceIndex; |
| 416 | } |
| 417 | } else { |
| 418 | /* output surrogate pair */ |
| 419 | *target++=(UChar)(0xd7c0+(c>>10)); |
| 420 | if(target<targetLimit) { |
| 421 | *target++=(UChar)(0xdc00|(c&0x3ff)); |
| 422 | if(offsets!=NULL__null) { |
| 423 | *offsets++=sourceIndex; |
| 424 | *offsets++=sourceIndex; |
| 425 | } |
| 426 | } else { |
| 427 | /* target overflow */ |
| 428 | if(offsets!=NULL__null) { |
| 429 | *offsets++=sourceIndex; |
| 430 | } |
| 431 | cnv->UCharErrorBuffer[0]=(UChar)(0xdc00|(c&0x3ff)); |
| 432 | cnv->UCharErrorBufferLength=1; |
| 433 | *pErrorCode=U_BUFFER_OVERFLOW_ERROR; |
| 434 | goto endloop; |
| 435 | } |
| 436 | } |
| 437 | } |
| 438 | sourceIndex=nextSourceIndex; |
| 439 | state=readCommand; |
| 440 | goto fastSingle; |
| 441 | case definePairOne: |
| 442 | dynamicWindow=(int8_t)((b>>5)&7); |
| 443 | byteOne=(uint8_t)(b&0x1f); |
| 444 | cnv->toUBytes[1]=b; |
| 445 | cnv->toULength=2; |
| 446 | state=definePairTwo; |
| 447 | break; |
| 448 | case definePairTwo: |
| 449 | scsu->toUDynamicOffsets[dynamicWindow]=0x10000+(byteOne<<15UL | b<<7UL); |
| 450 | sourceIndex=nextSourceIndex; |
| 451 | state=readCommand; |
| 452 | goto fastSingle; |
| 453 | case defineOne: |
| 454 | if(b==0) { |
| 455 | /* callback(illegal): Reserved window offset value 0 */ |
| 456 | cnv->toUBytes[1]=b; |
| 457 | cnv->toULength=2; |
| 458 | goto endloop; |
| 459 | } else if(b<gapThreshold) { |
| 460 | scsu->toUDynamicOffsets[dynamicWindow]=b<<7UL; |
| 461 | } else if((uint8_t)(b-gapThreshold)<(reservedStart-gapThreshold)) { |
| 462 | scsu->toUDynamicOffsets[dynamicWindow]=(b<<7UL)+gapOffset; |
| 463 | } else if(b>=fixedThreshold) { |
| 464 | scsu->toUDynamicOffsets[dynamicWindow]=fixedOffsets[b-fixedThreshold]; |
| 465 | } else { |
| 466 | /* callback(illegal): Reserved window offset value 0xa8..0xf8 */ |
| 467 | cnv->toUBytes[1]=b; |
| 468 | cnv->toULength=2; |
| 469 | goto endloop; |
| 470 | } |
| 471 | sourceIndex=nextSourceIndex; |
| 472 | state=readCommand; |
| 473 | goto fastSingle; |
| 474 | } |
| 475 | } |
| 476 | } else { |
| 477 | /* fast path for Unicode mode */ |
| 478 | if(state==readCommand) { |
| 479 | fastUnicode: |
| 480 | while(source+1<sourceLimit && target<targetLimit && (uint8_t)((b=*source)-UC0)>(Urs-UC0)) { |
| 481 | *target++=(UChar)((b<<8)|source[1]); |
| 482 | if(offsets!=NULL__null) { |
| 483 | *offsets++=sourceIndex; |
| 484 | } |
| 485 | sourceIndex=nextSourceIndex; |
| 486 | nextSourceIndex+=2; |
| 487 | source+=2; |
| 488 | } |
| 489 | } |
| 490 | |
| 491 | /* normal state machine for Unicode mode */ |
| 492 | /* unicodeByteMode: */ |
| 493 | while(source<sourceLimit) { |
| 494 | if(target>=targetLimit) { |
| 495 | /* target is full */ |
| 496 | *pErrorCode=U_BUFFER_OVERFLOW_ERROR; |
| 497 | break; |
| 498 | } |
| 499 | b=*source++; |
| 500 | ++nextSourceIndex; |
| 501 | switch(state) { |
| 502 | case readCommand: |
| 503 | if((uint8_t)(b-UC0)>(Urs-UC0)) { |
| 504 | byteOne=b; |
| 505 | cnv->toUBytes[0]=b; |
| 506 | cnv->toULength=1; |
| 507 | state=quotePairTwo; |
| 508 | } else if(/* UC0<=b && */ b<=UC7) { |
| 509 | dynamicWindow=(int8_t)(b-UC0); |
| 510 | sourceIndex=nextSourceIndex; |
| 511 | isSingleByteMode=TRUE1; |
| 512 | goto fastSingle; |
| 513 | } else if(/* UD0<=b && */ b<=UD7) { |
| 514 | dynamicWindow=(int8_t)(b-UD0); |
| 515 | isSingleByteMode=TRUE1; |
| 516 | cnv->toUBytes[0]=b; |
| 517 | cnv->toULength=1; |
| 518 | state=defineOne; |
| 519 | goto singleByteMode; |
| 520 | } else if(b==UDX) { |
| 521 | isSingleByteMode=TRUE1; |
| 522 | cnv->toUBytes[0]=b; |
| 523 | cnv->toULength=1; |
| 524 | state=definePairOne; |
| 525 | goto singleByteMode; |
| 526 | } else if(b==UQU) { |
| 527 | cnv->toUBytes[0]=b; |
| 528 | cnv->toULength=1; |
| 529 | state=quotePairOne; |
| 530 | } else /* Urs */ { |
| 531 | /* callback(illegal) */ |
| 532 | *pErrorCode=U_ILLEGAL_CHAR_FOUND; |
| 533 | cnv->toUBytes[0]=b; |
| 534 | cnv->toULength=1; |
| 535 | goto endloop; |
| 536 | } |
| 537 | break; |
| 538 | case quotePairOne: |
| 539 | byteOne=b; |
| 540 | cnv->toUBytes[1]=b; |
| 541 | cnv->toULength=2; |
| 542 | state=quotePairTwo; |
| 543 | break; |
| 544 | case quotePairTwo: |
| 545 | *target++=(UChar)((byteOne<<8)|b); |
| 546 | if(offsets!=NULL__null) { |
| 547 | *offsets++=sourceIndex; |
| 548 | } |
| 549 | sourceIndex=nextSourceIndex; |
| 550 | state=readCommand; |
| 551 | goto fastUnicode; |
| 552 | } |
| 553 | } |
| 554 | } |
| 555 | endloop: |
| 556 | |
| 557 | /* set the converter state back into UConverter */ |
| 558 | if(U_FAILURE(*pErrorCode) && *pErrorCode!=U_BUFFER_OVERFLOW_ERROR) { |
| 559 | /* reset to deal with the next character */ |
| 560 | state=readCommand; |
| 561 | } else if(state==readCommand) { |
| 562 | /* not in a multi-byte sequence, reset toULength */ |
| 563 | cnv->toULength=0; |
| 564 | } |
| 565 | scsu->toUIsSingleByteMode=isSingleByteMode; |
| 566 | scsu->toUState=state; |
| 567 | scsu->toUQuoteWindow=quoteWindow; |
| 568 | scsu->toUDynamicWindow=dynamicWindow; |
| 569 | scsu->toUByteOne=byteOne; |
| 570 | |
| 571 | /* write back the updated pointers */ |
| 572 | pArgs->source=(const char *)source; |
| 573 | pArgs->target=target; |
| 574 | pArgs->offsets=offsets; |
| 575 | return; |
| 576 | } |
| 577 | |
| 578 | /* |
| 579 | * Identical to _SCSUToUnicodeWithOffsets but without offset handling. |
| 580 | * If a change is made in the original function, then either |
| 581 | * change this function the same way or |
| 582 | * re-copy the original function and remove the variables |
| 583 | * offsets, sourceIndex, and nextSourceIndex. |
| 584 | */ |
| 585 | static void U_CALLCONV |
| 586 | _SCSUToUnicode(UConverterToUnicodeArgs *pArgs, |
| 587 | UErrorCode *pErrorCode) { |
| 588 | UConverter *cnv; |
| 589 | SCSUData *scsu; |
| 590 | const uint8_t *source, *sourceLimit; |
| 591 | UChar *target; |
| 592 | const UChar *targetLimit; |
| 593 | UBool isSingleByteMode; |
| 594 | uint8_t state, byteOne; |
| 595 | int8_t quoteWindow, dynamicWindow; |
| 596 | |
| 597 | uint8_t b; |
| 598 | |
| 599 | /* set up the local pointers */ |
| 600 | cnv=pArgs->converter; |
| 601 | scsu=(SCSUData *)cnv->extraInfo; |
| 602 | |
| 603 | source=(const uint8_t *)pArgs->source; |
| 604 | sourceLimit=(const uint8_t *)pArgs->sourceLimit; |
| 605 | target=pArgs->target; |
| 606 | targetLimit=pArgs->targetLimit; |
| 607 | |
| 608 | /* get the state machine state */ |
| 609 | isSingleByteMode=scsu->toUIsSingleByteMode; |
| 610 | state=scsu->toUState; |
| 611 | quoteWindow=scsu->toUQuoteWindow; |
| 612 | dynamicWindow=scsu->toUDynamicWindow; |
| 613 | byteOne=scsu->toUByteOne; |
| 614 | |
| 615 | /* |
| 616 | * conversion "loop" |
| 617 | * |
| 618 | * For performance, this is not a normal C loop. |
| 619 | * Instead, there are two code blocks for the two SCSU modes. |
| 620 | * The function branches to either one, and a change of the mode is done with a goto to |
| 621 | * the other branch. |
| 622 | * |
| 623 | * Each branch has two conventional loops: |
| 624 | * - a fast-path loop for the most common codes in the mode |
| 625 | * - a loop for all other codes in the mode |
| 626 | * When the fast-path runs into a code that it cannot handle, its loop ends and it |
| 627 | * runs into the following loop to handle the other codes. |
| 628 | * The end of the input or output buffer is also handled by the slower loop. |
| 629 | * The slow loop jumps (goto) to the fast-path loop again as soon as possible. |
| 630 | * |
| 631 | * The callback handling is done by returning with an error code. |
| 632 | * The conversion framework actually calls the callback function. |
| 633 | */ |
| 634 | if(isSingleByteMode) { |
| 635 | /* fast path for single-byte mode */ |
| 636 | if(state==readCommand) { |
| 637 | fastSingle: |
| 638 | while(source<sourceLimit && target<targetLimit && (b=*source)>=0x20) { |
| 639 | ++source; |
| 640 | if(b<=0x7f) { |
| 641 | /* write US-ASCII graphic character or DEL */ |
| 642 | *target++=(UChar)b; |
| 643 | } else { |
| 644 | /* write from dynamic window */ |
| 645 | uint32_t c=scsu->toUDynamicOffsets[dynamicWindow]+(b&0x7f); |
| 646 | if(c<=0xffff) { |
| 647 | *target++=(UChar)c; |
| 648 | } else { |
| 649 | /* output surrogate pair */ |
| 650 | *target++=(UChar)(0xd7c0+(c>>10)); |
| 651 | if(target<targetLimit) { |
| 652 | *target++=(UChar)(0xdc00|(c&0x3ff)); |
| 653 | } else { |
| 654 | /* target overflow */ |
| 655 | cnv->UCharErrorBuffer[0]=(UChar)(0xdc00|(c&0x3ff)); |
| 656 | cnv->UCharErrorBufferLength=1; |
| 657 | *pErrorCode=U_BUFFER_OVERFLOW_ERROR; |
| 658 | goto endloop; |
| 659 | } |
| 660 | } |
| 661 | } |
| 662 | } |
| 663 | } |
| 664 | |
| 665 | /* normal state machine for single-byte mode, minus handling for what fastSingle covers */ |
| 666 | singleByteMode: |
| 667 | while(source<sourceLimit) { |
| 668 | if(target>=targetLimit) { |
| 669 | /* target is full */ |
| 670 | *pErrorCode=U_BUFFER_OVERFLOW_ERROR; |
| 671 | break; |
| 672 | } |
| 673 | b=*source++; |
| 674 | switch(state) { |
| 675 | case readCommand: |
| 676 | /* redundant conditions are commented out */ |
| 677 | /* here: b<0x20 because otherwise we would be in fastSingle */ |
| 678 | if((1UL<<b)&0x2601 /* binary 0010 0110 0000 0001, check for b==0xd || b==0xa || b==9 || b==0 */) { |
| 679 | /* CR/LF/TAB/NUL */ |
| 680 | *target++=(UChar)b; |
| 681 | goto fastSingle; |
| 682 | } else if(SC0<=b) { |
| 683 | if(b<=SC7) { |
| 684 | dynamicWindow=(int8_t)(b-SC0); |
| 685 | goto fastSingle; |
| 686 | } else /* if(SD0<=b && b<=SD7) */ { |
| 687 | dynamicWindow=(int8_t)(b-SD0); |
| 688 | state=defineOne; |
| 689 | } |
| 690 | } else if(/* SQ0<=b && */ b<=SQ7) { |
| 691 | quoteWindow=(int8_t)(b-SQ0); |
| 692 | state=quoteOne; |
| 693 | } else if(b==SDX) { |
| 694 | state=definePairOne; |
| 695 | } else if(b==SQU) { |
| 696 | state=quotePairOne; |
| 697 | } else if(b==SCU) { |
| 698 | isSingleByteMode=FALSE0; |
| 699 | goto fastUnicode; |
| 700 | } else /* Srs */ { |
| 701 | /* callback(illegal) */ |
| 702 | *pErrorCode=U_ILLEGAL_CHAR_FOUND; |
| 703 | cnv->toUBytes[0]=b; |
| 704 | cnv->toULength=1; |
| 705 | goto endloop; |
| 706 | } |
| 707 | |
| 708 | /* store the first byte of a multibyte sequence in toUBytes[] */ |
| 709 | cnv->toUBytes[0]=b; |
| 710 | cnv->toULength=1; |
| 711 | break; |
| 712 | case quotePairOne: |
| 713 | byteOne=b; |
| 714 | cnv->toUBytes[1]=b; |
| 715 | cnv->toULength=2; |
| 716 | state=quotePairTwo; |
| 717 | break; |
| 718 | case quotePairTwo: |
| 719 | *target++=(UChar)((byteOne<<8)|b); |
| 720 | state=readCommand; |
| 721 | goto fastSingle; |
| 722 | case quoteOne: |
| 723 | if(b<0x80) { |
| 724 | /* all static offsets are in the BMP */ |
| 725 | *target++=(UChar)(staticOffsets[quoteWindow]+b); |
| 726 | } else { |
| 727 | /* write from dynamic window */ |
| 728 | uint32_t c=scsu->toUDynamicOffsets[quoteWindow]+(b&0x7f); |
| 729 | if(c<=0xffff) { |
| 730 | *target++=(UChar)c; |
| 731 | } else { |
| 732 | /* output surrogate pair */ |
| 733 | *target++=(UChar)(0xd7c0+(c>>10)); |
| 734 | if(target<targetLimit) { |
| 735 | *target++=(UChar)(0xdc00|(c&0x3ff)); |
| 736 | } else { |
| 737 | /* target overflow */ |
| 738 | cnv->UCharErrorBuffer[0]=(UChar)(0xdc00|(c&0x3ff)); |
| 739 | cnv->UCharErrorBufferLength=1; |
| 740 | *pErrorCode=U_BUFFER_OVERFLOW_ERROR; |
| 741 | goto endloop; |
| 742 | } |
| 743 | } |
| 744 | } |
| 745 | state=readCommand; |
| 746 | goto fastSingle; |
| 747 | case definePairOne: |
| 748 | dynamicWindow=(int8_t)((b>>5)&7); |
| 749 | byteOne=(uint8_t)(b&0x1f); |
| 750 | cnv->toUBytes[1]=b; |
| 751 | cnv->toULength=2; |
| 752 | state=definePairTwo; |
| 753 | break; |
| 754 | case definePairTwo: |
| 755 | scsu->toUDynamicOffsets[dynamicWindow]=0x10000+(byteOne<<15UL | b<<7UL); |
| 756 | state=readCommand; |
| 757 | goto fastSingle; |
| 758 | case defineOne: |
| 759 | if(b==0) { |
| 760 | /* callback(illegal): Reserved window offset value 0 */ |
| 761 | cnv->toUBytes[1]=b; |
| 762 | cnv->toULength=2; |
| 763 | goto endloop; |
| 764 | } else if(b<gapThreshold) { |
| 765 | scsu->toUDynamicOffsets[dynamicWindow]=b<<7UL; |
| 766 | } else if((uint8_t)(b-gapThreshold)<(reservedStart-gapThreshold)) { |
| 767 | scsu->toUDynamicOffsets[dynamicWindow]=(b<<7UL)+gapOffset; |
| 768 | } else if(b>=fixedThreshold) { |
| 769 | scsu->toUDynamicOffsets[dynamicWindow]=fixedOffsets[b-fixedThreshold]; |
| 770 | } else { |
| 771 | /* callback(illegal): Reserved window offset value 0xa8..0xf8 */ |
| 772 | cnv->toUBytes[1]=b; |
| 773 | cnv->toULength=2; |
| 774 | goto endloop; |
| 775 | } |
| 776 | state=readCommand; |
| 777 | goto fastSingle; |
| 778 | } |
| 779 | } |
| 780 | } else { |
| 781 | /* fast path for Unicode mode */ |
| 782 | if(state==readCommand) { |
| 783 | fastUnicode: |
| 784 | while(source+1<sourceLimit && target<targetLimit && (uint8_t)((b=*source)-UC0)>(Urs-UC0)) { |
| 785 | *target++=(UChar)((b<<8)|source[1]); |
| 786 | source+=2; |
| 787 | } |
| 788 | } |
| 789 | |
| 790 | /* normal state machine for Unicode mode */ |
| 791 | /* unicodeByteMode: */ |
| 792 | while(source<sourceLimit) { |
| 793 | if(target>=targetLimit) { |
| 794 | /* target is full */ |
| 795 | *pErrorCode=U_BUFFER_OVERFLOW_ERROR; |
| 796 | break; |
| 797 | } |
| 798 | b=*source++; |
| 799 | switch(state) { |
| 800 | case readCommand: |
| 801 | if((uint8_t)(b-UC0)>(Urs-UC0)) { |
| 802 | byteOne=b; |
| 803 | cnv->toUBytes[0]=b; |
| 804 | cnv->toULength=1; |
| 805 | state=quotePairTwo; |
| 806 | } else if(/* UC0<=b && */ b<=UC7) { |
| 807 | dynamicWindow=(int8_t)(b-UC0); |
| 808 | isSingleByteMode=TRUE1; |
| 809 | goto fastSingle; |
| 810 | } else if(/* UD0<=b && */ b<=UD7) { |
| 811 | dynamicWindow=(int8_t)(b-UD0); |
| 812 | isSingleByteMode=TRUE1; |
| 813 | cnv->toUBytes[0]=b; |
| 814 | cnv->toULength=1; |
| 815 | state=defineOne; |
| 816 | goto singleByteMode; |
| 817 | } else if(b==UDX) { |
| 818 | isSingleByteMode=TRUE1; |
| 819 | cnv->toUBytes[0]=b; |
| 820 | cnv->toULength=1; |
| 821 | state=definePairOne; |
| 822 | goto singleByteMode; |
| 823 | } else if(b==UQU) { |
| 824 | cnv->toUBytes[0]=b; |
| 825 | cnv->toULength=1; |
| 826 | state=quotePairOne; |
| 827 | } else /* Urs */ { |
| 828 | /* callback(illegal) */ |
| 829 | *pErrorCode=U_ILLEGAL_CHAR_FOUND; |
| 830 | cnv->toUBytes[0]=b; |
| 831 | cnv->toULength=1; |
| 832 | goto endloop; |
| 833 | } |
| 834 | break; |
| 835 | case quotePairOne: |
| 836 | byteOne=b; |
| 837 | cnv->toUBytes[1]=b; |
| 838 | cnv->toULength=2; |
| 839 | state=quotePairTwo; |
| 840 | break; |
| 841 | case quotePairTwo: |
| 842 | *target++=(UChar)((byteOne<<8)|b); |
| 843 | state=readCommand; |
| 844 | goto fastUnicode; |
| 845 | } |
| 846 | } |
| 847 | } |
| 848 | endloop: |
| 849 | |
| 850 | /* set the converter state back into UConverter */ |
| 851 | if(U_FAILURE(*pErrorCode) && *pErrorCode!=U_BUFFER_OVERFLOW_ERROR) { |
| 852 | /* reset to deal with the next character */ |
| 853 | state=readCommand; |
| 854 | } else if(state==readCommand) { |
| 855 | /* not in a multi-byte sequence, reset toULength */ |
| 856 | cnv->toULength=0; |
| 857 | } |
| 858 | scsu->toUIsSingleByteMode=isSingleByteMode; |
| 859 | scsu->toUState=state; |
| 860 | scsu->toUQuoteWindow=quoteWindow; |
| 861 | scsu->toUDynamicWindow=dynamicWindow; |
| 862 | scsu->toUByteOne=byteOne; |
| 863 | |
| 864 | /* write back the updated pointers */ |
| 865 | pArgs->source=(const char *)source; |
| 866 | pArgs->target=target; |
| 867 | return; |
| 868 | } |
| 869 | U_CDECL_END} |
| 870 | /* SCSU-from-Unicode conversion functions ----------------------------------- */ |
| 871 | |
| 872 | /* |
| 873 | * This SCSU Encoder is fairly simple but uses all SCSU commands to achieve |
| 874 | * reasonable results. The lookahead is minimal. |
| 875 | * Many cases are simple: |
| 876 | * A character fits directly into the current mode, a dynamic or static window, |
| 877 | * or is not compressible. These cases are tested first. |
| 878 | * Real compression heuristics are applied to the rest, in code branches for |
| 879 | * single/Unicode mode and BMP/supplementary code points. |
| 880 | * The heuristics used here are extremely simple. |
| 881 | */ |
| 882 | |
| 883 | /* get the number of the window that this character is in, or -1 */ |
| 884 | static int8_t |
| 885 | getWindow(const uint32_t offsets[8], uint32_t c) { |
| 886 | int i; |
| 887 | for(i=0; i<8; ++i) { |
| 888 | if((uint32_t)(c-offsets[i])<=0x7f) { |
| 889 | return (int8_t)(i); |
| 890 | } |
| 891 | } |
| 892 | return -1; |
| 893 | } |
| 894 | |
| 895 | /* is the character in the dynamic window starting at the offset, or in the direct-encoded range? */ |
| 896 | static UBool |
| 897 | isInOffsetWindowOrDirect(uint32_t offset, uint32_t c) { |
| 898 | return (UBool)(c<=offset+0x7f && |
| 899 | (c>=offset || (c<=0x7f && |
| 900 | (c>=0x20 || (1UL<<c)&0x2601)))); |
| 901 | /* binary 0010 0110 0000 0001, |
| 902 | check for b==0xd || b==0xa || b==9 || b==0 */ |
| 903 | } |
| 904 | |
| 905 | /* |
| 906 | * getNextDynamicWindow returns the next dynamic window to be redefined |
| 907 | */ |
| 908 | static int8_t |
| 909 | getNextDynamicWindow(SCSUData *scsu) { |
| 910 | int8_t window=scsu->windowUse[scsu->nextWindowUseIndex]; |
| 911 | if(++scsu->nextWindowUseIndex==8) { |
| 912 | scsu->nextWindowUseIndex=0; |
| 913 | } |
| 914 | return window; |
| 915 | } |
| 916 | |
| 917 | /* |
| 918 | * useDynamicWindow() adjusts |
| 919 | * windowUse[] and nextWindowUseIndex for the algorithm to choose |
| 920 | * the next dynamic window to be defined; |
| 921 | * a subclass may override it and provide its own algorithm. |
| 922 | */ |
| 923 | static void |
| 924 | useDynamicWindow(SCSUData *scsu, int8_t window) { |
| 925 | /* |
| 926 | * move the existing window, which just became the most recently used one, |
| 927 | * up in windowUse[] to nextWindowUseIndex-1 |
| 928 | */ |
| 929 | |
| 930 | /* first, find the index of the window - backwards to favor the more recently used windows */ |
| 931 | int i, j; |
| 932 | |
| 933 | i=scsu->nextWindowUseIndex; |
| 934 | do { |
| 935 | if(--i<0) { |
| 936 | i=7; |
| 937 | } |
| 938 | } while(scsu->windowUse[i]!=window); |
| 939 | |
| 940 | /* now copy each windowUse[i+1] to [i] */ |
| 941 | j=i+1; |
| 942 | if(j==8) { |
| 943 | j=0; |
| 944 | } |
| 945 | while(j!=scsu->nextWindowUseIndex) { |
| 946 | scsu->windowUse[i]=scsu->windowUse[j]; |
| 947 | i=j; |
| 948 | if(++j==8) { j=0; } |
| 949 | } |
| 950 | |
| 951 | /* finally, set the window into the most recently used index */ |
| 952 | scsu->windowUse[i]=window; |
| 953 | } |
| 954 | |
| 955 | /* |
| 956 | * calculate the offset and the code for a dynamic window that contains the character |
| 957 | * takes fixed offsets into account |
| 958 | * the offset of the window is stored in the offset variable, |
| 959 | * the code is returned |
| 960 | * |
| 961 | * return offset code: -1 none <=0xff code for SDn/UDn else code for SDX/UDX, subtract 0x200 to get the true code |
| 962 | */ |
| 963 | static int |
| 964 | getDynamicOffset(uint32_t c, uint32_t *pOffset) { |
| 965 | int i; |
| 966 | |
| 967 | for(i=0; i<7; ++i) { |
| 968 | if((uint32_t)(c-fixedOffsets[i])<=0x7f) { |
| 969 | *pOffset=fixedOffsets[i]; |
| 970 | return 0xf9+i; |
| 971 | } |
| 972 | } |
| 973 | |
| 974 | if(c<0x80) { |
| 975 | /* No dynamic window for US-ASCII. */ |
| 976 | return -1; |
| 977 | } else if(c<0x3400 || |
| 978 | (uint32_t)(c-0x10000)<(0x14000-0x10000) || |
| 979 | (uint32_t)(c-0x1d000)<=(0x1ffff-0x1d000) |
| 980 | ) { |
| 981 | /* This character is in a code range for a "small", i.e., reasonably windowable, script. */ |
| 982 | *pOffset=c&0x7fffff80; |
| 983 | return (int)(c>>7); |
| 984 | } else if(0xe000<=c && c!=0xfeff && c<0xfff0) { |
| 985 | /* For these characters we need to take the gapOffset into account. */ |
| 986 | *pOffset=c&0x7fffff80; |
| 987 | return (int)((c-gapOffset)>>7); |
| 988 | } else { |
| 989 | return -1; |
| 990 | } |
| 991 | } |
| 992 | U_CDECL_BEGINextern "C" { |
| 993 | /* |
| 994 | * Idea for compression: |
| 995 | * - save SCSUData and other state before really starting work |
| 996 | * - at endloop, see if compression could be better with just unicode mode |
| 997 | * - don't do this if a callback has been called |
| 998 | * - if unicode mode would be smaller, then override the results with it - may need SCU at the beginning |
| 999 | * - different buffer handling! |
| 1000 | * |
| 1001 | * Drawback or need for corrective handling: |
| 1002 | * it is desirable to encode U+feff as SQU fe ff for the SCSU signature, and |
| 1003 | * it is desirable to start a document in US-ASCII/Latin-1 for as long as possible |
| 1004 | * not only for compression but also for HTML/XML documents with following charset/encoding announcers. |
| 1005 | * |
| 1006 | * How to achieve both? |
| 1007 | * - Only replace the result after an SDX or SCU? |
| 1008 | */ |
| 1009 | |
| 1010 | static void U_CALLCONV |
| 1011 | _SCSUFromUnicodeWithOffsets(UConverterFromUnicodeArgs *pArgs, |
| 1012 | UErrorCode *pErrorCode) { |
| 1013 | UConverter *cnv; |
| 1014 | SCSUData *scsu; |
| 1015 | const UChar *source, *sourceLimit; |
| 1016 | uint8_t *target; |
| 1017 | int32_t targetCapacity; |
| 1018 | int32_t *offsets; |
| 1019 | |
| 1020 | UBool isSingleByteMode; |
| 1021 | uint8_t dynamicWindow; |
| 1022 | uint32_t currentOffset; |
| 1023 | |
| 1024 | uint32_t c, delta; |
| 1025 | |
| 1026 | int32_t sourceIndex, nextSourceIndex; |
| 1027 | |
| 1028 | int32_t length; |
| 1029 | |
| 1030 | /* variables for compression heuristics */ |
| 1031 | uint32_t offset; |
| 1032 | UChar lead, trail; |
| 1033 | int code; |
| 1034 | int8_t window; |
| 1035 | |
| 1036 | /* set up the local pointers */ |
| 1037 | cnv=pArgs->converter; |
| 1038 | scsu=(SCSUData *)cnv->extraInfo; |
| 1039 | |
| 1040 | /* set up the local pointers */ |
| 1041 | source=pArgs->source; |
| 1042 | sourceLimit=pArgs->sourceLimit; |
| 1043 | target=(uint8_t *)pArgs->target; |
| 1044 | targetCapacity=(int32_t)(pArgs->targetLimit-pArgs->target); |
| 1045 | offsets=pArgs->offsets; |
| 1046 | |
| 1047 | /* get the state machine state */ |
| 1048 | isSingleByteMode=scsu->fromUIsSingleByteMode; |
| 1049 | dynamicWindow=scsu->fromUDynamicWindow; |
| 1050 | currentOffset=scsu->fromUDynamicOffsets[dynamicWindow]; |
| 1051 | |
| 1052 | c=cnv->fromUChar32; |
| 1053 | |
| 1054 | /* sourceIndex=-1 if the current character began in the previous buffer */ |
| 1055 | sourceIndex= c==0 ? 0 : -1; |
| 1056 | nextSourceIndex=0; |
| 1057 | |
| 1058 | /* similar conversion "loop" as in toUnicode */ |
| 1059 | loop: |
| 1060 | if(isSingleByteMode) { |
| 1061 | if(c!=0 && targetCapacity>0) { |
| 1062 | goto getTrailSingle; |
| 1063 | } |
| 1064 | |
| 1065 | /* state machine for single-byte mode */ |
| 1066 | /* singleByteMode: */ |
| 1067 | while(source<sourceLimit) { |
| 1068 | if(targetCapacity<=0) { |
| 1069 | /* target is full */ |
| 1070 | *pErrorCode=U_BUFFER_OVERFLOW_ERROR; |
| 1071 | break; |
| 1072 | } |
| 1073 | c=*source++; |
| 1074 | ++nextSourceIndex; |
| 1075 | |
| 1076 | if((c-0x20)<=0x5f) { |
| 1077 | /* pass US-ASCII graphic character through */ |
| 1078 | *target++=(uint8_t)c; |
| 1079 | if(offsets!=NULL__null) { |
| 1080 | *offsets++=sourceIndex; |
| 1081 | } |
| 1082 | --targetCapacity; |
| 1083 | } else if(c<0x20) { |
| 1084 | if((1UL<<c)&0x2601 /* binary 0010 0110 0000 0001, check for b==0xd || b==0xa || b==9 || b==0 */) { |
| 1085 | /* CR/LF/TAB/NUL */ |
| 1086 | *target++=(uint8_t)c; |
| 1087 | if(offsets!=NULL__null) { |
| 1088 | *offsets++=sourceIndex; |
| 1089 | } |
| 1090 | --targetCapacity; |
| 1091 | } else { |
| 1092 | /* quote C0 control character */ |
| 1093 | c|=SQ0<<8; |
| 1094 | length=2; |
| 1095 | goto outputBytes; |
| 1096 | } |
| 1097 | } else if((delta=c-currentOffset)<=0x7f) { |
| 1098 | /* use the current dynamic window */ |
| 1099 | *target++=(uint8_t)(delta|0x80); |
| 1100 | if(offsets!=NULL__null) { |
| 1101 | *offsets++=sourceIndex; |
| 1102 | } |
| 1103 | --targetCapacity; |
| 1104 | } else if(U16_IS_SURROGATE(c)(((c)&0xfffff800)==0xd800)) { |
| 1105 | if(U16_IS_SURROGATE_LEAD(c)(((c)&0x400)==0)) { |
| 1106 | getTrailSingle: |
| 1107 | lead=(UChar)c; |
| 1108 | if(source<sourceLimit) { |
| 1109 | /* test the following code unit */ |
| 1110 | trail=*source; |
| 1111 | if(U16_IS_TRAIL(trail)(((trail)&0xfffffc00)==0xdc00)) { |
| 1112 | ++source; |
| 1113 | ++nextSourceIndex; |
| 1114 | c=U16_GET_SUPPLEMENTARY(c, trail)(((UChar32)(c)<<10UL)+(UChar32)(trail)-((0xd800<< 10UL)+0xdc00-0x10000)); |
| 1115 | /* convert this surrogate code point */ |
| 1116 | /* exit this condition tree */ |
| 1117 | } else { |
| 1118 | /* this is an unmatched lead code unit (1st surrogate) */ |
| 1119 | /* callback(illegal) */ |
| 1120 | *pErrorCode=U_ILLEGAL_CHAR_FOUND; |
| 1121 | goto endloop; |
| 1122 | } |
| 1123 | } else { |
| 1124 | /* no more input */ |
| 1125 | break; |
| 1126 | } |
| 1127 | } else { |
| 1128 | /* this is an unmatched trail code unit (2nd surrogate) */ |
| 1129 | /* callback(illegal) */ |
| 1130 | *pErrorCode=U_ILLEGAL_CHAR_FOUND; |
| 1131 | goto endloop; |
| 1132 | } |
| 1133 | |
| 1134 | /* compress supplementary character U+10000..U+10ffff */ |
| 1135 | if((delta=c-currentOffset)<=0x7f) { |
| 1136 | /* use the current dynamic window */ |
| 1137 | *target++=(uint8_t)(delta|0x80); |
| 1138 | if(offsets!=NULL__null) { |
| 1139 | *offsets++=sourceIndex; |
| 1140 | } |
| 1141 | --targetCapacity; |
| 1142 | } else if((window=getWindow(scsu->fromUDynamicOffsets, c))>=0) { |
| 1143 | /* there is a dynamic window that contains this character, change to it */ |
| 1144 | dynamicWindow=window; |
| 1145 | currentOffset=scsu->fromUDynamicOffsets[dynamicWindow]; |
| 1146 | useDynamicWindow(scsu, dynamicWindow); |
| 1147 | c=((uint32_t)(SC0+dynamicWindow)<<8)|(c-currentOffset)|0x80; |
| 1148 | length=2; |
| 1149 | goto outputBytes; |
| 1150 | } else if((code=getDynamicOffset(c, &offset))>=0) { |
| 1151 | /* might check if there are more characters in this window to come */ |
| 1152 | /* define an extended window with this character */ |
| 1153 | code-=0x200; |
| 1154 | dynamicWindow=getNextDynamicWindow(scsu); |
| 1155 | currentOffset=scsu->fromUDynamicOffsets[dynamicWindow]=offset; |
| 1156 | useDynamicWindow(scsu, dynamicWindow); |
| 1157 | c=((uint32_t)SDX<<24)|((uint32_t)dynamicWindow<<21)|((uint32_t)code<<8)|(c-currentOffset)|0x80; |
| 1158 | length=4; |
| 1159 | goto outputBytes; |
| 1160 | } else { |
| 1161 | /* change to Unicode mode and output this (lead, trail) pair */ |
| 1162 | isSingleByteMode=FALSE0; |
| 1163 | *target++=(uint8_t)SCU; |
| 1164 | if(offsets!=NULL__null) { |
| 1165 | *offsets++=sourceIndex; |
| 1166 | } |
| 1167 | --targetCapacity; |
| 1168 | c=((uint32_t)lead<<16)|trail; |
| 1169 | length=4; |
| 1170 | goto outputBytes; |
| 1171 | } |
| 1172 | } else if(c<0xa0) { |
| 1173 | /* quote C1 control character */ |
| 1174 | c=(c&0x7f)|(SQ0+1)<<8; /* SQ0+1==SQ1 */ |
| 1175 | length=2; |
| 1176 | goto outputBytes; |
| 1177 | } else if(c==0xfeff || c>=0xfff0) { |
| 1178 | /* quote signature character=byte order mark and specials */ |
| 1179 | c|=SQU<<16; |
| 1180 | length=3; |
| 1181 | goto outputBytes; |
| 1182 | } else { |
| 1183 | /* compress all other BMP characters */ |
| 1184 | if((window=getWindow(scsu->fromUDynamicOffsets, c))>=0) { |
| 1185 | /* there is a window defined that contains this character - switch to it or quote from it? */ |
| 1186 | if(source>=sourceLimit || isInOffsetWindowOrDirect(scsu->fromUDynamicOffsets[window], *source)) { |
| 1187 | /* change to dynamic window */ |
| 1188 | dynamicWindow=window; |
| 1189 | currentOffset=scsu->fromUDynamicOffsets[dynamicWindow]; |
| 1190 | useDynamicWindow(scsu, dynamicWindow); |
| 1191 | c=((uint32_t)(SC0+dynamicWindow)<<8)|(c-currentOffset)|0x80; |
| 1192 | length=2; |
| 1193 | goto outputBytes; |
| 1194 | } else { |
| 1195 | /* quote from dynamic window */ |
| 1196 | c=((uint32_t)(SQ0+window)<<8)|(c-scsu->fromUDynamicOffsets[window])|0x80; |
| 1197 | length=2; |
| 1198 | goto outputBytes; |
| 1199 | } |
| 1200 | } else if((window=getWindow(staticOffsets, c))>=0) { |
| 1201 | /* quote from static window */ |
| 1202 | c=((uint32_t)(SQ0+window)<<8)|(c-staticOffsets[window]); |
| 1203 | length=2; |
| 1204 | goto outputBytes; |
| 1205 | } else if((code=getDynamicOffset(c, &offset))>=0) { |
| 1206 | /* define a dynamic window with this character */ |
| 1207 | dynamicWindow=getNextDynamicWindow(scsu); |
| 1208 | currentOffset=scsu->fromUDynamicOffsets[dynamicWindow]=offset; |
| 1209 | useDynamicWindow(scsu, dynamicWindow); |
| 1210 | c=((uint32_t)(SD0+dynamicWindow)<<16)|((uint32_t)code<<8)|(c-currentOffset)|0x80; |
| 1211 | length=3; |
| 1212 | goto outputBytes; |
| 1213 | } else if((uint32_t)(c-0x3400)<(0xd800-0x3400) && |
| 1214 | (source>=sourceLimit || (uint32_t)(*source-0x3400)<(0xd800-0x3400)) |
| 1215 | ) { |
| 1216 | /* |
| 1217 | * this character is not compressible (a BMP ideograph or similar); |
| 1218 | * switch to Unicode mode if this is the last character in the block |
| 1219 | * or there is at least one more ideograph following immediately |
| 1220 | */ |
| 1221 | isSingleByteMode=FALSE0; |
| 1222 | c|=SCU<<16; |
| 1223 | length=3; |
| 1224 | goto outputBytes; |
| 1225 | } else { |
| 1226 | /* quote Unicode */ |
| 1227 | c|=SQU<<16; |
| 1228 | length=3; |
| 1229 | goto outputBytes; |
| 1230 | } |
| 1231 | } |
| 1232 | |
| 1233 | /* normal end of conversion: prepare for a new character */ |
| 1234 | c=0; |
| 1235 | sourceIndex=nextSourceIndex; |
| 1236 | } |
| 1237 | } else { |
| 1238 | if(c!=0 && targetCapacity>0) { |
| 1239 | goto getTrailUnicode; |
| 1240 | } |
| 1241 | |
| 1242 | /* state machine for Unicode mode */ |
| 1243 | /* unicodeByteMode: */ |
| 1244 | while(source<sourceLimit) { |
| 1245 | if(targetCapacity<=0) { |
| 1246 | /* target is full */ |
| 1247 | *pErrorCode=U_BUFFER_OVERFLOW_ERROR; |
| 1248 | break; |
| 1249 | } |
| 1250 | c=*source++; |
| 1251 | ++nextSourceIndex; |
| 1252 | |
| 1253 | if((uint32_t)(c-0x3400)<(0xd800-0x3400)) { |
| 1254 | /* not compressible, write character directly */ |
| 1255 | if(targetCapacity>=2) { |
| 1256 | *target++=(uint8_t)(c>>8); |
| 1257 | *target++=(uint8_t)c; |
| 1258 | if(offsets!=NULL__null) { |
| 1259 | *offsets++=sourceIndex; |
| 1260 | *offsets++=sourceIndex; |
| 1261 | } |
| 1262 | targetCapacity-=2; |
| 1263 | } else { |
| 1264 | length=2; |
| 1265 | goto outputBytes; |
| 1266 | } |
| 1267 | } else if((uint32_t)(c-0x3400)>=(0xf300-0x3400) /* c<0x3400 || c>=0xf300 */) { |
| 1268 | /* compress BMP character if the following one is not an uncompressible ideograph */ |
| 1269 | if(!(source<sourceLimit && (uint32_t)(*source-0x3400)<(0xd800-0x3400))) { |
| 1270 | if(((uint32_t)(c-0x30)<10 || (uint32_t)(c-0x61)<26 || (uint32_t)(c-0x41)<26)) { |
| 1271 | /* ASCII digit or letter */ |
| 1272 | isSingleByteMode=TRUE1; |
| 1273 | c|=((uint32_t)(UC0+dynamicWindow)<<8)|c; |
| 1274 | length=2; |
| 1275 | goto outputBytes; |
| 1276 | } else if((window=getWindow(scsu->fromUDynamicOffsets, c))>=0) { |
| 1277 | /* there is a dynamic window that contains this character, change to it */ |
| 1278 | isSingleByteMode=TRUE1; |
| 1279 | dynamicWindow=window; |
| 1280 | currentOffset=scsu->fromUDynamicOffsets[dynamicWindow]; |
| 1281 | useDynamicWindow(scsu, dynamicWindow); |
| 1282 | c=((uint32_t)(UC0+dynamicWindow)<<8)|(c-currentOffset)|0x80; |
| 1283 | length=2; |
| 1284 | goto outputBytes; |
| 1285 | } else if((code=getDynamicOffset(c, &offset))>=0) { |
| 1286 | /* define a dynamic window with this character */ |
| 1287 | isSingleByteMode=TRUE1; |
| 1288 | dynamicWindow=getNextDynamicWindow(scsu); |
| 1289 | currentOffset=scsu->fromUDynamicOffsets[dynamicWindow]=offset; |
| 1290 | useDynamicWindow(scsu, dynamicWindow); |
| 1291 | c=((uint32_t)(UD0+dynamicWindow)<<16)|((uint32_t)code<<8)|(c-currentOffset)|0x80; |
| 1292 | length=3; |
| 1293 | goto outputBytes; |
| 1294 | } |
| 1295 | } |
| 1296 | |
| 1297 | /* don't know how to compress this character, just write it directly */ |
| 1298 | length=2; |
| 1299 | goto outputBytes; |
| 1300 | } else if(c<0xe000) { |
| 1301 | /* c is a surrogate */ |
| 1302 | if(U16_IS_SURROGATE_LEAD(c)(((c)&0x400)==0)) { |
| 1303 | getTrailUnicode: |
| 1304 | lead=(UChar)c; |
| 1305 | if(source<sourceLimit) { |
| 1306 | /* test the following code unit */ |
| 1307 | trail=*source; |
| 1308 | if(U16_IS_TRAIL(trail)(((trail)&0xfffffc00)==0xdc00)) { |
| 1309 | ++source; |
| 1310 | ++nextSourceIndex; |
| 1311 | c=U16_GET_SUPPLEMENTARY(c, trail)(((UChar32)(c)<<10UL)+(UChar32)(trail)-((0xd800<< 10UL)+0xdc00-0x10000)); |
| 1312 | /* convert this surrogate code point */ |
| 1313 | /* exit this condition tree */ |
| 1314 | } else { |
| 1315 | /* this is an unmatched lead code unit (1st surrogate) */ |
| 1316 | /* callback(illegal) */ |
| 1317 | *pErrorCode=U_ILLEGAL_CHAR_FOUND; |
| 1318 | goto endloop; |
| 1319 | } |
| 1320 | } else { |
| 1321 | /* no more input */ |
| 1322 | break; |
| 1323 | } |
| 1324 | } else { |
| 1325 | /* this is an unmatched trail code unit (2nd surrogate) */ |
| 1326 | /* callback(illegal) */ |
| 1327 | *pErrorCode=U_ILLEGAL_CHAR_FOUND; |
| 1328 | goto endloop; |
| 1329 | } |
| 1330 | |
| 1331 | /* compress supplementary character */ |
| 1332 | if( (window=getWindow(scsu->fromUDynamicOffsets, c))>=0 && |
| 1333 | !(source<sourceLimit && (uint32_t)(*source-0x3400)<(0xd800-0x3400)) |
| 1334 | ) { |
| 1335 | /* |
| 1336 | * there is a dynamic window that contains this character and |
| 1337 | * the following character is not uncompressible, |
| 1338 | * change to the window |
| 1339 | */ |
| 1340 | isSingleByteMode=TRUE1; |
| 1341 | dynamicWindow=window; |
| 1342 | currentOffset=scsu->fromUDynamicOffsets[dynamicWindow]; |
| 1343 | useDynamicWindow(scsu, dynamicWindow); |
| 1344 | c=((uint32_t)(UC0+dynamicWindow)<<8)|(c-currentOffset)|0x80; |
| 1345 | length=2; |
| 1346 | goto outputBytes; |
| 1347 | } else if(source<sourceLimit && lead==*source && /* too lazy to check trail in same window as source[1] */ |
| 1348 | (code=getDynamicOffset(c, &offset))>=0 |
| 1349 | ) { |
| 1350 | /* two supplementary characters in (probably) the same window - define an extended one */ |
| 1351 | isSingleByteMode=TRUE1; |
| 1352 | code-=0x200; |
| 1353 | dynamicWindow=getNextDynamicWindow(scsu); |
| 1354 | currentOffset=scsu->fromUDynamicOffsets[dynamicWindow]=offset; |
| 1355 | useDynamicWindow(scsu, dynamicWindow); |
| 1356 | c=((uint32_t)UDX<<24)|((uint32_t)dynamicWindow<<21)|((uint32_t)code<<8)|(c-currentOffset)|0x80; |
| 1357 | length=4; |
| 1358 | goto outputBytes; |
| 1359 | } else { |
| 1360 | /* don't know how to compress this character, just write it directly */ |
| 1361 | c=((uint32_t)lead<<16)|trail; |
| 1362 | length=4; |
| 1363 | goto outputBytes; |
| 1364 | } |
| 1365 | } else /* 0xe000<=c<0xf300 */ { |
| 1366 | /* quote to avoid SCSU tags */ |
| 1367 | c|=UQU<<16; |
| 1368 | length=3; |
| 1369 | goto outputBytes; |
| 1370 | } |
| 1371 | |
| 1372 | /* normal end of conversion: prepare for a new character */ |
| 1373 | c=0; |
| 1374 | sourceIndex=nextSourceIndex; |
| 1375 | } |
| 1376 | } |
| 1377 | endloop: |
| 1378 | |
| 1379 | /* set the converter state back into UConverter */ |
| 1380 | scsu->fromUIsSingleByteMode=isSingleByteMode; |
| 1381 | scsu->fromUDynamicWindow=dynamicWindow; |
| 1382 | |
| 1383 | cnv->fromUChar32=c; |
| 1384 | |
| 1385 | /* write back the updated pointers */ |
| 1386 | pArgs->source=source; |
| 1387 | pArgs->target=(char *)target; |
| 1388 | pArgs->offsets=offsets; |
| 1389 | return; |
| 1390 | |
| 1391 | outputBytes: |
| 1392 | /* write the output character bytes from c and length [code copied from ucnvmbcs.c] */ |
| 1393 | /* from the first if in the loop we know that targetCapacity>0 */ |
| 1394 | if(length<=targetCapacity) { |
| 1395 | if(offsets==NULL__null) { |
| 1396 | switch(length) { |
| 1397 | /* each branch falls through to the next one */ |
| 1398 | case 4: |
| 1399 | *target++=(uint8_t)(c>>24); |
| 1400 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1401 | case 3: |
| 1402 | *target++=(uint8_t)(c>>16); |
| 1403 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1404 | case 2: |
| 1405 | *target++=(uint8_t)(c>>8); |
| 1406 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1407 | case 1: |
| 1408 | *target++=(uint8_t)c; |
| 1409 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1410 | default: |
| 1411 | /* will never occur */ |
| 1412 | break; |
| 1413 | } |
| 1414 | } else { |
| 1415 | switch(length) { |
| 1416 | /* each branch falls through to the next one */ |
| 1417 | case 4: |
| 1418 | *target++=(uint8_t)(c>>24); |
| 1419 | *offsets++=sourceIndex; |
| 1420 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1421 | case 3: |
| 1422 | *target++=(uint8_t)(c>>16); |
| 1423 | *offsets++=sourceIndex; |
| 1424 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1425 | case 2: |
| 1426 | *target++=(uint8_t)(c>>8); |
| 1427 | *offsets++=sourceIndex; |
| 1428 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1429 | case 1: |
| 1430 | *target++=(uint8_t)c; |
| 1431 | *offsets++=sourceIndex; |
| 1432 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1433 | default: |
| 1434 | /* will never occur */ |
| 1435 | break; |
| 1436 | } |
| 1437 | } |
| 1438 | targetCapacity-=length; |
| 1439 | |
| 1440 | /* normal end of conversion: prepare for a new character */ |
| 1441 | c=0; |
| 1442 | sourceIndex=nextSourceIndex; |
| 1443 | goto loop; |
| 1444 | } else { |
| 1445 | uint8_t *p; |
| 1446 | |
| 1447 | /* |
| 1448 | * We actually do this backwards here: |
| 1449 | * In order to save an intermediate variable, we output |
| 1450 | * first to the overflow buffer what does not fit into the |
| 1451 | * regular target. |
| 1452 | */ |
| 1453 | /* we know that 0<=targetCapacity<length<=4 */ |
| 1454 | /* targetCapacity==0 when SCU+supplementary where SCU used up targetCapacity==1 */ |
| 1455 | length-=targetCapacity; |
| 1456 | p=(uint8_t *)cnv->charErrorBuffer; |
| 1457 | switch(length) { |
| 1458 | /* each branch falls through to the next one */ |
| 1459 | case 4: |
| 1460 | *p++=(uint8_t)(c>>24); |
| 1461 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1462 | case 3: |
| 1463 | *p++=(uint8_t)(c>>16); |
| 1464 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1465 | case 2: |
| 1466 | *p++=(uint8_t)(c>>8); |
| 1467 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1468 | case 1: |
| 1469 | *p=(uint8_t)c; |
| 1470 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1471 | default: |
| 1472 | /* will never occur */ |
| 1473 | break; |
| 1474 | } |
| 1475 | cnv->charErrorBufferLength=(int8_t)length; |
| 1476 | |
| 1477 | /* now output what fits into the regular target */ |
| 1478 | c>>=8*length; /* length was reduced by targetCapacity */ |
| 1479 | switch(targetCapacity) { |
| 1480 | /* each branch falls through to the next one */ |
| 1481 | case 3: |
| 1482 | *target++=(uint8_t)(c>>16); |
| 1483 | if(offsets!=NULL__null) { |
| 1484 | *offsets++=sourceIndex; |
| 1485 | } |
| 1486 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1487 | case 2: |
| 1488 | *target++=(uint8_t)(c>>8); |
| 1489 | if(offsets!=NULL__null) { |
| 1490 | *offsets++=sourceIndex; |
| 1491 | } |
| 1492 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1493 | case 1: |
| 1494 | *target++=(uint8_t)c; |
| 1495 | if(offsets!=NULL__null) { |
| 1496 | *offsets++=sourceIndex; |
| 1497 | } |
| 1498 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1499 | default: |
| 1500 | break; |
| 1501 | } |
| 1502 | |
| 1503 | /* target overflow */ |
| 1504 | targetCapacity=0; |
Value stored to 'targetCapacity' is never read | |
| 1505 | *pErrorCode=U_BUFFER_OVERFLOW_ERROR; |
| 1506 | c=0; |
| 1507 | goto endloop; |
| 1508 | } |
| 1509 | } |
| 1510 | |
| 1511 | /* |
| 1512 | * Identical to _SCSUFromUnicodeWithOffsets but without offset handling. |
| 1513 | * If a change is made in the original function, then either |
| 1514 | * change this function the same way or |
| 1515 | * re-copy the original function and remove the variables |
| 1516 | * offsets, sourceIndex, and nextSourceIndex. |
| 1517 | */ |
| 1518 | static void U_CALLCONV |
| 1519 | _SCSUFromUnicode(UConverterFromUnicodeArgs *pArgs, |
| 1520 | UErrorCode *pErrorCode) { |
| 1521 | UConverter *cnv; |
| 1522 | SCSUData *scsu; |
| 1523 | const UChar *source, *sourceLimit; |
| 1524 | uint8_t *target; |
| 1525 | int32_t targetCapacity; |
| 1526 | |
| 1527 | UBool isSingleByteMode; |
| 1528 | uint8_t dynamicWindow; |
| 1529 | uint32_t currentOffset; |
| 1530 | |
| 1531 | uint32_t c, delta; |
| 1532 | |
| 1533 | int32_t length; |
| 1534 | |
| 1535 | /* variables for compression heuristics */ |
| 1536 | uint32_t offset; |
| 1537 | UChar lead, trail; |
| 1538 | int code; |
| 1539 | int8_t window; |
| 1540 | |
| 1541 | /* set up the local pointers */ |
| 1542 | cnv=pArgs->converter; |
| 1543 | scsu=(SCSUData *)cnv->extraInfo; |
| 1544 | |
| 1545 | /* set up the local pointers */ |
| 1546 | source=pArgs->source; |
| 1547 | sourceLimit=pArgs->sourceLimit; |
| 1548 | target=(uint8_t *)pArgs->target; |
| 1549 | targetCapacity=(int32_t)(pArgs->targetLimit-pArgs->target); |
| 1550 | |
| 1551 | /* get the state machine state */ |
| 1552 | isSingleByteMode=scsu->fromUIsSingleByteMode; |
| 1553 | dynamicWindow=scsu->fromUDynamicWindow; |
| 1554 | currentOffset=scsu->fromUDynamicOffsets[dynamicWindow]; |
| 1555 | |
| 1556 | c=cnv->fromUChar32; |
| 1557 | |
| 1558 | /* similar conversion "loop" as in toUnicode */ |
| 1559 | loop: |
| 1560 | if(isSingleByteMode) { |
| 1561 | if(c!=0 && targetCapacity>0) { |
| 1562 | goto getTrailSingle; |
| 1563 | } |
| 1564 | |
| 1565 | /* state machine for single-byte mode */ |
| 1566 | /* singleByteMode: */ |
| 1567 | while(source<sourceLimit) { |
| 1568 | if(targetCapacity<=0) { |
| 1569 | /* target is full */ |
| 1570 | *pErrorCode=U_BUFFER_OVERFLOW_ERROR; |
| 1571 | break; |
| 1572 | } |
| 1573 | c=*source++; |
| 1574 | |
| 1575 | if((c-0x20)<=0x5f) { |
| 1576 | /* pass US-ASCII graphic character through */ |
| 1577 | *target++=(uint8_t)c; |
| 1578 | --targetCapacity; |
| 1579 | } else if(c<0x20) { |
| 1580 | if((1UL<<c)&0x2601 /* binary 0010 0110 0000 0001, check for b==0xd || b==0xa || b==9 || b==0 */) { |
| 1581 | /* CR/LF/TAB/NUL */ |
| 1582 | *target++=(uint8_t)c; |
| 1583 | --targetCapacity; |
| 1584 | } else { |
| 1585 | /* quote C0 control character */ |
| 1586 | c|=SQ0<<8; |
| 1587 | length=2; |
| 1588 | goto outputBytes; |
| 1589 | } |
| 1590 | } else if((delta=c-currentOffset)<=0x7f) { |
| 1591 | /* use the current dynamic window */ |
| 1592 | *target++=(uint8_t)(delta|0x80); |
| 1593 | --targetCapacity; |
| 1594 | } else if(U16_IS_SURROGATE(c)(((c)&0xfffff800)==0xd800)) { |
| 1595 | if(U16_IS_SURROGATE_LEAD(c)(((c)&0x400)==0)) { |
| 1596 | getTrailSingle: |
| 1597 | lead=(UChar)c; |
| 1598 | if(source<sourceLimit) { |
| 1599 | /* test the following code unit */ |
| 1600 | trail=*source; |
| 1601 | if(U16_IS_TRAIL(trail)(((trail)&0xfffffc00)==0xdc00)) { |
| 1602 | ++source; |
| 1603 | c=U16_GET_SUPPLEMENTARY(c, trail)(((UChar32)(c)<<10UL)+(UChar32)(trail)-((0xd800<< 10UL)+0xdc00-0x10000)); |
| 1604 | /* convert this surrogate code point */ |
| 1605 | /* exit this condition tree */ |
| 1606 | } else { |
| 1607 | /* this is an unmatched lead code unit (1st surrogate) */ |
| 1608 | /* callback(illegal) */ |
| 1609 | *pErrorCode=U_ILLEGAL_CHAR_FOUND; |
| 1610 | goto endloop; |
| 1611 | } |
| 1612 | } else { |
| 1613 | /* no more input */ |
| 1614 | break; |
| 1615 | } |
| 1616 | } else { |
| 1617 | /* this is an unmatched trail code unit (2nd surrogate) */ |
| 1618 | /* callback(illegal) */ |
| 1619 | *pErrorCode=U_ILLEGAL_CHAR_FOUND; |
| 1620 | goto endloop; |
| 1621 | } |
| 1622 | |
| 1623 | /* compress supplementary character U+10000..U+10ffff */ |
| 1624 | if((delta=c-currentOffset)<=0x7f) { |
| 1625 | /* use the current dynamic window */ |
| 1626 | *target++=(uint8_t)(delta|0x80); |
| 1627 | --targetCapacity; |
| 1628 | } else if((window=getWindow(scsu->fromUDynamicOffsets, c))>=0) { |
| 1629 | /* there is a dynamic window that contains this character, change to it */ |
| 1630 | dynamicWindow=window; |
| 1631 | currentOffset=scsu->fromUDynamicOffsets[dynamicWindow]; |
| 1632 | useDynamicWindow(scsu, dynamicWindow); |
| 1633 | c=((uint32_t)(SC0+dynamicWindow)<<8)|(c-currentOffset)|0x80; |
| 1634 | length=2; |
| 1635 | goto outputBytes; |
| 1636 | } else if((code=getDynamicOffset(c, &offset))>=0) { |
| 1637 | /* might check if there are more characters in this window to come */ |
| 1638 | /* define an extended window with this character */ |
| 1639 | code-=0x200; |
| 1640 | dynamicWindow=getNextDynamicWindow(scsu); |
| 1641 | currentOffset=scsu->fromUDynamicOffsets[dynamicWindow]=offset; |
| 1642 | useDynamicWindow(scsu, dynamicWindow); |
| 1643 | c=((uint32_t)SDX<<24)|((uint32_t)dynamicWindow<<21)|((uint32_t)code<<8)|(c-currentOffset)|0x80; |
| 1644 | length=4; |
| 1645 | goto outputBytes; |
| 1646 | } else { |
| 1647 | /* change to Unicode mode and output this (lead, trail) pair */ |
| 1648 | isSingleByteMode=FALSE0; |
| 1649 | *target++=(uint8_t)SCU; |
| 1650 | --targetCapacity; |
| 1651 | c=((uint32_t)lead<<16)|trail; |
| 1652 | length=4; |
| 1653 | goto outputBytes; |
| 1654 | } |
| 1655 | } else if(c<0xa0) { |
| 1656 | /* quote C1 control character */ |
| 1657 | c=(c&0x7f)|(SQ0+1)<<8; /* SQ0+1==SQ1 */ |
| 1658 | length=2; |
| 1659 | goto outputBytes; |
| 1660 | } else if(c==0xfeff || c>=0xfff0) { |
| 1661 | /* quote signature character=byte order mark and specials */ |
| 1662 | c|=SQU<<16; |
| 1663 | length=3; |
| 1664 | goto outputBytes; |
| 1665 | } else { |
| 1666 | /* compress all other BMP characters */ |
| 1667 | if((window=getWindow(scsu->fromUDynamicOffsets, c))>=0) { |
| 1668 | /* there is a window defined that contains this character - switch to it or quote from it? */ |
| 1669 | if(source>=sourceLimit || isInOffsetWindowOrDirect(scsu->fromUDynamicOffsets[window], *source)) { |
| 1670 | /* change to dynamic window */ |
| 1671 | dynamicWindow=window; |
| 1672 | currentOffset=scsu->fromUDynamicOffsets[dynamicWindow]; |
| 1673 | useDynamicWindow(scsu, dynamicWindow); |
| 1674 | c=((uint32_t)(SC0+dynamicWindow)<<8)|(c-currentOffset)|0x80; |
| 1675 | length=2; |
| 1676 | goto outputBytes; |
| 1677 | } else { |
| 1678 | /* quote from dynamic window */ |
| 1679 | c=((uint32_t)(SQ0+window)<<8)|(c-scsu->fromUDynamicOffsets[window])|0x80; |
| 1680 | length=2; |
| 1681 | goto outputBytes; |
| 1682 | } |
| 1683 | } else if((window=getWindow(staticOffsets, c))>=0) { |
| 1684 | /* quote from static window */ |
| 1685 | c=((uint32_t)(SQ0+window)<<8)|(c-staticOffsets[window]); |
| 1686 | length=2; |
| 1687 | goto outputBytes; |
| 1688 | } else if((code=getDynamicOffset(c, &offset))>=0) { |
| 1689 | /* define a dynamic window with this character */ |
| 1690 | dynamicWindow=getNextDynamicWindow(scsu); |
| 1691 | currentOffset=scsu->fromUDynamicOffsets[dynamicWindow]=offset; |
| 1692 | useDynamicWindow(scsu, dynamicWindow); |
| 1693 | c=((uint32_t)(SD0+dynamicWindow)<<16)|((uint32_t)code<<8)|(c-currentOffset)|0x80; |
| 1694 | length=3; |
| 1695 | goto outputBytes; |
| 1696 | } else if((uint32_t)(c-0x3400)<(0xd800-0x3400) && |
| 1697 | (source>=sourceLimit || (uint32_t)(*source-0x3400)<(0xd800-0x3400)) |
| 1698 | ) { |
| 1699 | /* |
| 1700 | * this character is not compressible (a BMP ideograph or similar); |
| 1701 | * switch to Unicode mode if this is the last character in the block |
| 1702 | * or there is at least one more ideograph following immediately |
| 1703 | */ |
| 1704 | isSingleByteMode=FALSE0; |
| 1705 | c|=SCU<<16; |
| 1706 | length=3; |
| 1707 | goto outputBytes; |
| 1708 | } else { |
| 1709 | /* quote Unicode */ |
| 1710 | c|=SQU<<16; |
| 1711 | length=3; |
| 1712 | goto outputBytes; |
| 1713 | } |
| 1714 | } |
| 1715 | |
| 1716 | /* normal end of conversion: prepare for a new character */ |
| 1717 | c=0; |
| 1718 | } |
| 1719 | } else { |
| 1720 | if(c!=0 && targetCapacity>0) { |
| 1721 | goto getTrailUnicode; |
| 1722 | } |
| 1723 | |
| 1724 | /* state machine for Unicode mode */ |
| 1725 | /* unicodeByteMode: */ |
| 1726 | while(source<sourceLimit) { |
| 1727 | if(targetCapacity<=0) { |
| 1728 | /* target is full */ |
| 1729 | *pErrorCode=U_BUFFER_OVERFLOW_ERROR; |
| 1730 | break; |
| 1731 | } |
| 1732 | c=*source++; |
| 1733 | |
| 1734 | if((uint32_t)(c-0x3400)<(0xd800-0x3400)) { |
| 1735 | /* not compressible, write character directly */ |
| 1736 | if(targetCapacity>=2) { |
| 1737 | *target++=(uint8_t)(c>>8); |
| 1738 | *target++=(uint8_t)c; |
| 1739 | targetCapacity-=2; |
| 1740 | } else { |
| 1741 | length=2; |
| 1742 | goto outputBytes; |
| 1743 | } |
| 1744 | } else if((uint32_t)(c-0x3400)>=(0xf300-0x3400) /* c<0x3400 || c>=0xf300 */) { |
| 1745 | /* compress BMP character if the following one is not an uncompressible ideograph */ |
| 1746 | if(!(source<sourceLimit && (uint32_t)(*source-0x3400)<(0xd800-0x3400))) { |
| 1747 | if(((uint32_t)(c-0x30)<10 || (uint32_t)(c-0x61)<26 || (uint32_t)(c-0x41)<26)) { |
| 1748 | /* ASCII digit or letter */ |
| 1749 | isSingleByteMode=TRUE1; |
| 1750 | c|=((uint32_t)(UC0+dynamicWindow)<<8)|c; |
| 1751 | length=2; |
| 1752 | goto outputBytes; |
| 1753 | } else if((window=getWindow(scsu->fromUDynamicOffsets, c))>=0) { |
| 1754 | /* there is a dynamic window that contains this character, change to it */ |
| 1755 | isSingleByteMode=TRUE1; |
| 1756 | dynamicWindow=window; |
| 1757 | currentOffset=scsu->fromUDynamicOffsets[dynamicWindow]; |
| 1758 | useDynamicWindow(scsu, dynamicWindow); |
| 1759 | c=((uint32_t)(UC0+dynamicWindow)<<8)|(c-currentOffset)|0x80; |
| 1760 | length=2; |
| 1761 | goto outputBytes; |
| 1762 | } else if((code=getDynamicOffset(c, &offset))>=0) { |
| 1763 | /* define a dynamic window with this character */ |
| 1764 | isSingleByteMode=TRUE1; |
| 1765 | dynamicWindow=getNextDynamicWindow(scsu); |
| 1766 | currentOffset=scsu->fromUDynamicOffsets[dynamicWindow]=offset; |
| 1767 | useDynamicWindow(scsu, dynamicWindow); |
| 1768 | c=((uint32_t)(UD0+dynamicWindow)<<16)|((uint32_t)code<<8)|(c-currentOffset)|0x80; |
| 1769 | length=3; |
| 1770 | goto outputBytes; |
| 1771 | } |
| 1772 | } |
| 1773 | |
| 1774 | /* don't know how to compress this character, just write it directly */ |
| 1775 | length=2; |
| 1776 | goto outputBytes; |
| 1777 | } else if(c<0xe000) { |
| 1778 | /* c is a surrogate */ |
| 1779 | if(U16_IS_SURROGATE_LEAD(c)(((c)&0x400)==0)) { |
| 1780 | getTrailUnicode: |
| 1781 | lead=(UChar)c; |
| 1782 | if(source<sourceLimit) { |
| 1783 | /* test the following code unit */ |
| 1784 | trail=*source; |
| 1785 | if(U16_IS_TRAIL(trail)(((trail)&0xfffffc00)==0xdc00)) { |
| 1786 | ++source; |
| 1787 | c=U16_GET_SUPPLEMENTARY(c, trail)(((UChar32)(c)<<10UL)+(UChar32)(trail)-((0xd800<< 10UL)+0xdc00-0x10000)); |
| 1788 | /* convert this surrogate code point */ |
| 1789 | /* exit this condition tree */ |
| 1790 | } else { |
| 1791 | /* this is an unmatched lead code unit (1st surrogate) */ |
| 1792 | /* callback(illegal) */ |
| 1793 | *pErrorCode=U_ILLEGAL_CHAR_FOUND; |
| 1794 | goto endloop; |
| 1795 | } |
| 1796 | } else { |
| 1797 | /* no more input */ |
| 1798 | break; |
| 1799 | } |
| 1800 | } else { |
| 1801 | /* this is an unmatched trail code unit (2nd surrogate) */ |
| 1802 | /* callback(illegal) */ |
| 1803 | *pErrorCode=U_ILLEGAL_CHAR_FOUND; |
| 1804 | goto endloop; |
| 1805 | } |
| 1806 | |
| 1807 | /* compress supplementary character */ |
| 1808 | if( (window=getWindow(scsu->fromUDynamicOffsets, c))>=0 && |
| 1809 | !(source<sourceLimit && (uint32_t)(*source-0x3400)<(0xd800-0x3400)) |
| 1810 | ) { |
| 1811 | /* |
| 1812 | * there is a dynamic window that contains this character and |
| 1813 | * the following character is not uncompressible, |
| 1814 | * change to the window |
| 1815 | */ |
| 1816 | isSingleByteMode=TRUE1; |
| 1817 | dynamicWindow=window; |
| 1818 | currentOffset=scsu->fromUDynamicOffsets[dynamicWindow]; |
| 1819 | useDynamicWindow(scsu, dynamicWindow); |
| 1820 | c=((uint32_t)(UC0+dynamicWindow)<<8)|(c-currentOffset)|0x80; |
| 1821 | length=2; |
| 1822 | goto outputBytes; |
| 1823 | } else if(source<sourceLimit && lead==*source && /* too lazy to check trail in same window as source[1] */ |
| 1824 | (code=getDynamicOffset(c, &offset))>=0 |
| 1825 | ) { |
| 1826 | /* two supplementary characters in (probably) the same window - define an extended one */ |
| 1827 | isSingleByteMode=TRUE1; |
| 1828 | code-=0x200; |
| 1829 | dynamicWindow=getNextDynamicWindow(scsu); |
| 1830 | currentOffset=scsu->fromUDynamicOffsets[dynamicWindow]=offset; |
| 1831 | useDynamicWindow(scsu, dynamicWindow); |
| 1832 | c=((uint32_t)UDX<<24)|((uint32_t)dynamicWindow<<21)|((uint32_t)code<<8)|(c-currentOffset)|0x80; |
| 1833 | length=4; |
| 1834 | goto outputBytes; |
| 1835 | } else { |
| 1836 | /* don't know how to compress this character, just write it directly */ |
| 1837 | c=((uint32_t)lead<<16)|trail; |
| 1838 | length=4; |
| 1839 | goto outputBytes; |
| 1840 | } |
| 1841 | } else /* 0xe000<=c<0xf300 */ { |
| 1842 | /* quote to avoid SCSU tags */ |
| 1843 | c|=UQU<<16; |
| 1844 | length=3; |
| 1845 | goto outputBytes; |
| 1846 | } |
| 1847 | |
| 1848 | /* normal end of conversion: prepare for a new character */ |
| 1849 | c=0; |
| 1850 | } |
| 1851 | } |
| 1852 | endloop: |
| 1853 | |
| 1854 | /* set the converter state back into UConverter */ |
| 1855 | scsu->fromUIsSingleByteMode=isSingleByteMode; |
| 1856 | scsu->fromUDynamicWindow=dynamicWindow; |
| 1857 | |
| 1858 | cnv->fromUChar32=c; |
| 1859 | |
| 1860 | /* write back the updated pointers */ |
| 1861 | pArgs->source=source; |
| 1862 | pArgs->target=(char *)target; |
| 1863 | return; |
| 1864 | |
| 1865 | outputBytes: |
| 1866 | /* write the output character bytes from c and length [code copied from ucnvmbcs.c] */ |
| 1867 | /* from the first if in the loop we know that targetCapacity>0 */ |
| 1868 | if(length<=targetCapacity) { |
| 1869 | switch(length) { |
| 1870 | /* each branch falls through to the next one */ |
| 1871 | case 4: |
| 1872 | *target++=(uint8_t)(c>>24); |
| 1873 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1874 | case 3: |
| 1875 | *target++=(uint8_t)(c>>16); |
| 1876 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1877 | case 2: |
| 1878 | *target++=(uint8_t)(c>>8); |
| 1879 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1880 | case 1: |
| 1881 | *target++=(uint8_t)c; |
| 1882 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1883 | default: |
| 1884 | /* will never occur */ |
| 1885 | break; |
| 1886 | } |
| 1887 | targetCapacity-=length; |
| 1888 | |
| 1889 | /* normal end of conversion: prepare for a new character */ |
| 1890 | c=0; |
| 1891 | goto loop; |
| 1892 | } else { |
| 1893 | uint8_t *p; |
| 1894 | |
| 1895 | /* |
| 1896 | * We actually do this backwards here: |
| 1897 | * In order to save an intermediate variable, we output |
| 1898 | * first to the overflow buffer what does not fit into the |
| 1899 | * regular target. |
| 1900 | */ |
| 1901 | /* we know that 0<=targetCapacity<length<=4 */ |
| 1902 | /* targetCapacity==0 when SCU+supplementary where SCU used up targetCapacity==1 */ |
| 1903 | length-=targetCapacity; |
| 1904 | p=(uint8_t *)cnv->charErrorBuffer; |
| 1905 | switch(length) { |
| 1906 | /* each branch falls through to the next one */ |
| 1907 | case 4: |
| 1908 | *p++=(uint8_t)(c>>24); |
| 1909 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1910 | case 3: |
| 1911 | *p++=(uint8_t)(c>>16); |
| 1912 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1913 | case 2: |
| 1914 | *p++=(uint8_t)(c>>8); |
| 1915 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1916 | case 1: |
| 1917 | *p=(uint8_t)c; |
| 1918 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1919 | default: |
| 1920 | /* will never occur */ |
| 1921 | break; |
| 1922 | } |
| 1923 | cnv->charErrorBufferLength=(int8_t)length; |
| 1924 | |
| 1925 | /* now output what fits into the regular target */ |
| 1926 | c>>=8*length; /* length was reduced by targetCapacity */ |
| 1927 | switch(targetCapacity) { |
| 1928 | /* each branch falls through to the next one */ |
| 1929 | case 3: |
| 1930 | *target++=(uint8_t)(c>>16); |
| 1931 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1932 | case 2: |
| 1933 | *target++=(uint8_t)(c>>8); |
| 1934 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1935 | case 1: |
| 1936 | *target++=(uint8_t)c; |
| 1937 | U_FALLTHROUGH[[clang::fallthrough]]; |
| 1938 | default: |
| 1939 | break; |
| 1940 | } |
| 1941 | |
| 1942 | /* target overflow */ |
| 1943 | targetCapacity=0; |
| 1944 | *pErrorCode=U_BUFFER_OVERFLOW_ERROR; |
| 1945 | c=0; |
| 1946 | goto endloop; |
| 1947 | } |
| 1948 | } |
| 1949 | |
| 1950 | /* miscellaneous ------------------------------------------------------------ */ |
| 1951 | |
| 1952 | static const char * U_CALLCONV |
| 1953 | _SCSUGetName(const UConverter *cnv) { |
| 1954 | SCSUData *scsu=(SCSUData *)cnv->extraInfo; |
| 1955 | |
| 1956 | switch(scsu->locale) { |
| 1957 | case l_ja: |
| 1958 | return "SCSU,locale=ja"; |
| 1959 | default: |
| 1960 | return "SCSU"; |
| 1961 | } |
| 1962 | } |
| 1963 | |
| 1964 | /* structure for SafeClone calculations */ |
| 1965 | struct cloneSCSUStruct |
| 1966 | { |
| 1967 | UConverter cnv; |
| 1968 | SCSUData mydata; |
| 1969 | }; |
| 1970 | |
| 1971 | static UConverter * U_CALLCONV |
| 1972 | _SCSUSafeClone(const UConverter *cnv, |
| 1973 | void *stackBuffer, |
| 1974 | int32_t *pBufferSize, |
| 1975 | UErrorCode *status) |
| 1976 | { |
| 1977 | struct cloneSCSUStruct * localClone; |
| 1978 | int32_t bufferSizeNeeded = sizeof(struct cloneSCSUStruct); |
| 1979 | |
| 1980 | if (U_FAILURE(*status)){ |
| 1981 | return 0; |
| 1982 | } |
| 1983 | |
| 1984 | if (*pBufferSize == 0){ /* 'preflighting' request - set needed size into *pBufferSize */ |
| 1985 | *pBufferSize = bufferSizeNeeded; |
| 1986 | return 0; |
| 1987 | } |
| 1988 | |
| 1989 | localClone = (struct cloneSCSUStruct *)stackBuffer; |
| 1990 | /* ucnv.c/ucnv_safeClone() copied the main UConverter already */ |
| 1991 | |
| 1992 | uprv_memcpy(&localClone->mydata, cnv->extraInfo, sizeof(SCSUData))do { clang diagnostic push
clang diagnostic ignored "-Waddress" (void)0; (void)0; clang diagnostic pop :: memcpy(&localClone ->mydata, cnv->extraInfo, sizeof(SCSUData)); } while (false ); |
| 1993 | localClone->cnv.extraInfo = &localClone->mydata; |
| 1994 | localClone->cnv.isExtraLocal = TRUE1; |
| 1995 | |
| 1996 | return &localClone->cnv; |
| 1997 | } |
| 1998 | U_CDECL_END} |
| 1999 | |
| 2000 | static const UConverterImpl _SCSUImpl={ |
| 2001 | UCNV_SCSU, |
| 2002 | |
| 2003 | NULL__null, |
| 2004 | NULL__null, |
| 2005 | |
| 2006 | _SCSUOpen, |
| 2007 | _SCSUClose, |
| 2008 | _SCSUReset, |
| 2009 | |
| 2010 | _SCSUToUnicode, |
| 2011 | _SCSUToUnicodeWithOffsets, |
| 2012 | _SCSUFromUnicode, |
| 2013 | _SCSUFromUnicodeWithOffsets, |
| 2014 | NULL__null, |
| 2015 | |
| 2016 | NULL__null, |
| 2017 | _SCSUGetName, |
| 2018 | NULL__null, |
| 2019 | _SCSUSafeClone, |
| 2020 | ucnv_getCompleteUnicodeSetucnv_getCompleteUnicodeSet_71, |
| 2021 | NULL__null, |
| 2022 | NULL__null |
| 2023 | }; |
| 2024 | |
| 2025 | static const UConverterStaticData _SCSUStaticData={ |
| 2026 | sizeof(UConverterStaticData), |
| 2027 | "SCSU", |
| 2028 | 1212, /* CCSID for SCSU */ |
| 2029 | UCNV_IBM, UCNV_SCSU, |
| 2030 | 1, 3, /* one UChar generates at least 1 byte and at most 3 bytes */ |
| 2031 | /* |
| 2032 | * The subchar here is ignored because _SCSUOpen() sets U+fffd as a Unicode |
| 2033 | * substitution string. |
| 2034 | */ |
| 2035 | { 0x0e, 0xff, 0xfd, 0 }, 3, |
| 2036 | FALSE0, FALSE0, |
| 2037 | 0, |
| 2038 | 0, |
| 2039 | { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } /* reserved */ |
| 2040 | }; |
| 2041 | |
| 2042 | const UConverterSharedData _SCSUData_SCSUData_71= |
| 2043 | UCNV_IMMUTABLE_SHARED_DATA_INITIALIZER(&_SCSUStaticData, &_SCSUImpl){ sizeof(UConverterSharedData), ~((uint32_t)0), __null, & _SCSUStaticData, false, false, &_SCSUImpl, 0, { 0, 0, 0, 0 , __null, __null, __null, __null, __null, __null, { 0 }, __null , __null, 0, 0, 0, false, 0, 0, __null, __null, __null, __null } }; |
| 2044 | |
| 2045 | #endif |