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| 1 // Copyright 2014 PDFium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | |
| 6 | |
| 7 #include "core/fpdfapi/fpdf_parser/fpdf_parser_decode.h" | |
| 8 | |
| 9 #include <limits.h> | |
| 10 | |
| 11 #include <algorithm> | |
| 12 #include <utility> | |
| 13 #include <vector> | |
| 14 | |
| 15 #include "core/fpdfapi/cpdf_modulemgr.h" | |
| 16 #include "core/fpdfapi/fpdf_parser/cpdf_array.h" | |
| 17 #include "core/fpdfapi/fpdf_parser/cpdf_dictionary.h" | |
| 18 #include "core/fpdfapi/fpdf_parser/fpdf_parser_utility.h" | |
| 19 #include "core/fxcodec/fx_codec.h" | |
| 20 #include "core/fxcrt/fx_ext.h" | |
| 21 #include "third_party/base/stl_util.h" | |
| 22 | |
| 23 namespace { | |
| 24 | |
| 25 const uint32_t kMaxStreamSize = 20 * 1024 * 1024; | |
| 26 | |
| 27 bool CheckFlateDecodeParams(int Colors, int BitsPerComponent, int Columns) { | |
| 28 if (Colors < 0 || BitsPerComponent < 0 || Columns < 0) | |
| 29 return false; | |
| 30 | |
| 31 int check = Columns; | |
| 32 if (check > 0 && Colors > INT_MAX / check) | |
| 33 return false; | |
| 34 | |
| 35 check *= Colors; | |
| 36 if (check > 0 && BitsPerComponent > INT_MAX / check) | |
| 37 return false; | |
| 38 | |
| 39 return check * BitsPerComponent <= INT_MAX - 7; | |
| 40 } | |
| 41 | |
| 42 } // namespace | |
| 43 | |
| 44 const uint16_t PDFDocEncoding[256] = { | |
| 45 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008, | |
| 46 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f, 0x0010, 0x0011, | |
| 47 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017, 0x02d8, 0x02c7, 0x02c6, | |
| 48 0x02d9, 0x02dd, 0x02db, 0x02da, 0x02dc, 0x0020, 0x0021, 0x0022, 0x0023, | |
| 49 0x0024, 0x0025, 0x0026, 0x0027, 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, | |
| 50 0x002d, 0x002e, 0x002f, 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, | |
| 51 0x0036, 0x0037, 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, | |
| 52 0x003f, 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, | |
| 53 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f, 0x0050, | |
| 54 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, 0x0058, 0x0059, | |
| 55 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f, 0x0060, 0x0061, 0x0062, | |
| 56 0x0063, 0x0064, 0x0065, 0x0066, 0x0067, 0x0068, 0x0069, 0x006a, 0x006b, | |
| 57 0x006c, 0x006d, 0x006e, 0x006f, 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, | |
| 58 0x0075, 0x0076, 0x0077, 0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, | |
| 59 0x007e, 0x0000, 0x2022, 0x2020, 0x2021, 0x2026, 0x2014, 0x2013, 0x0192, | |
| 60 0x2044, 0x2039, 0x203a, 0x2212, 0x2030, 0x201e, 0x201c, 0x201d, 0x2018, | |
| 61 0x2019, 0x201a, 0x2122, 0xfb01, 0xfb02, 0x0141, 0x0152, 0x0160, 0x0178, | |
| 62 0x017d, 0x0131, 0x0142, 0x0153, 0x0161, 0x017e, 0x0000, 0x20ac, 0x00a1, | |
| 63 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7, 0x00a8, 0x00a9, 0x00aa, | |
| 64 0x00ab, 0x00ac, 0x0000, 0x00ae, 0x00af, 0x00b0, 0x00b1, 0x00b2, 0x00b3, | |
| 65 0x00b4, 0x00b5, 0x00b6, 0x00b7, 0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, | |
| 66 0x00bd, 0x00be, 0x00bf, 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, | |
| 67 0x00c6, 0x00c7, 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, | |
| 68 0x00cf, 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7, | |
| 69 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df, 0x00e0, | |
| 70 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7, 0x00e8, 0x00e9, | |
| 71 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef, 0x00f0, 0x00f1, 0x00f2, | |
| 72 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7, 0x00f8, 0x00f9, 0x00fa, 0x00fb, | |
| 73 0x00fc, 0x00fd, 0x00fe, 0x00ff}; | |
| 74 | |
| 75 uint32_t A85Decode(const uint8_t* src_buf, | |
| 76 uint32_t src_size, | |
| 77 uint8_t*& dest_buf, | |
| 78 uint32_t& dest_size) { | |
| 79 dest_size = 0; | |
| 80 dest_buf = nullptr; | |
| 81 if (src_size == 0) | |
| 82 return 0; | |
| 83 | |
| 84 // Count legal characters and zeros. | |
| 85 uint32_t zcount = 0; | |
| 86 uint32_t pos = 0; | |
| 87 while (pos < src_size) { | |
| 88 uint8_t ch = src_buf[pos]; | |
| 89 if (ch == 'z') { | |
| 90 zcount++; | |
| 91 } else if ((ch < '!' || ch > 'u') && !PDFCharIsLineEnding(ch) && | |
| 92 ch != ' ' && ch != '\t') { | |
| 93 break; | |
| 94 } | |
| 95 pos++; | |
| 96 } | |
| 97 // No content to decode. | |
| 98 if (pos == 0) | |
| 99 return 0; | |
| 100 | |
| 101 // Count the space needed to contain non-zero characters. The encoding ratio | |
| 102 // of Ascii85 is 4:5. | |
| 103 uint32_t space_for_non_zeroes = (pos - zcount) / 5 * 4 + 4; | |
| 104 if (zcount > (UINT_MAX - space_for_non_zeroes) / 4) { | |
| 105 return (uint32_t)-1; | |
| 106 } | |
| 107 dest_buf = FX_Alloc(uint8_t, zcount * 4 + space_for_non_zeroes); | |
| 108 size_t state = 0; | |
| 109 uint32_t res = 0; | |
| 110 pos = dest_size = 0; | |
| 111 while (pos < src_size) { | |
| 112 uint8_t ch = src_buf[pos++]; | |
| 113 if (PDFCharIsLineEnding(ch) || ch == ' ' || ch == '\t') | |
| 114 continue; | |
| 115 | |
| 116 if (ch == 'z') { | |
| 117 FXSYS_memset(dest_buf + dest_size, 0, 4); | |
| 118 state = 0; | |
| 119 res = 0; | |
| 120 dest_size += 4; | |
| 121 } else if (ch >= '!' && ch <= 'u') { | |
| 122 res = res * 85 + ch - 33; | |
| 123 state++; | |
| 124 if (state == 5) { | |
| 125 for (size_t i = 0; i < 4; i++) { | |
| 126 dest_buf[dest_size++] = (uint8_t)(res >> (3 - i) * 8); | |
| 127 } | |
| 128 state = 0; | |
| 129 res = 0; | |
| 130 } | |
| 131 } else { | |
| 132 // The end or illegal character. | |
| 133 break; | |
| 134 } | |
| 135 } | |
| 136 // Handle partial group. | |
| 137 if (state) { | |
| 138 for (size_t i = state; i < 5; i++) | |
| 139 res = res * 85 + 84; | |
| 140 for (size_t i = 0; i < state - 1; i++) | |
| 141 dest_buf[dest_size++] = (uint8_t)(res >> (3 - i) * 8); | |
| 142 } | |
| 143 if (pos < src_size && src_buf[pos] == '>') | |
| 144 pos++; | |
| 145 return pos; | |
| 146 } | |
| 147 | |
| 148 uint32_t HexDecode(const uint8_t* src_buf, | |
| 149 uint32_t src_size, | |
| 150 uint8_t*& dest_buf, | |
| 151 uint32_t& dest_size) { | |
| 152 dest_size = 0; | |
| 153 if (src_size == 0) { | |
| 154 dest_buf = nullptr; | |
| 155 return 0; | |
| 156 } | |
| 157 | |
| 158 uint32_t i = 0; | |
| 159 // Find the end of data. | |
| 160 while (i < src_size && src_buf[i] != '>') | |
| 161 i++; | |
| 162 | |
| 163 dest_buf = FX_Alloc(uint8_t, i / 2 + 1); | |
| 164 bool bFirst = true; | |
| 165 for (i = 0; i < src_size; i++) { | |
| 166 uint8_t ch = src_buf[i]; | |
| 167 if (PDFCharIsLineEnding(ch) || ch == ' ' || ch == '\t') | |
| 168 continue; | |
| 169 | |
| 170 if (ch == '>') { | |
| 171 ++i; | |
| 172 break; | |
| 173 } | |
| 174 if (!std::isxdigit(ch)) | |
| 175 continue; | |
| 176 | |
| 177 int digit = FXSYS_toHexDigit(ch); | |
| 178 if (bFirst) | |
| 179 dest_buf[dest_size] = digit * 16; | |
| 180 else | |
| 181 dest_buf[dest_size++] += digit; | |
| 182 | |
| 183 bFirst = !bFirst; | |
| 184 } | |
| 185 if (!bFirst) | |
| 186 dest_size++; | |
| 187 return i; | |
| 188 } | |
| 189 | |
| 190 uint32_t RunLengthDecode(const uint8_t* src_buf, | |
| 191 uint32_t src_size, | |
| 192 uint8_t*& dest_buf, | |
| 193 uint32_t& dest_size) { | |
| 194 uint32_t i = 0; | |
| 195 dest_size = 0; | |
| 196 while (i < src_size) { | |
| 197 if (src_buf[i] == 128) | |
| 198 break; | |
| 199 | |
| 200 uint32_t old = dest_size; | |
| 201 if (src_buf[i] < 128) { | |
| 202 dest_size += src_buf[i] + 1; | |
| 203 if (dest_size < old) | |
| 204 return FX_INVALID_OFFSET; | |
| 205 i += src_buf[i] + 2; | |
| 206 } else { | |
| 207 dest_size += 257 - src_buf[i]; | |
| 208 if (dest_size < old) | |
| 209 return FX_INVALID_OFFSET; | |
| 210 i += 2; | |
| 211 } | |
| 212 } | |
| 213 if (dest_size >= kMaxStreamSize) | |
| 214 return FX_INVALID_OFFSET; | |
| 215 | |
| 216 dest_buf = FX_Alloc(uint8_t, dest_size); | |
| 217 i = 0; | |
| 218 int dest_count = 0; | |
| 219 while (i < src_size) { | |
| 220 if (src_buf[i] == 128) | |
| 221 break; | |
| 222 | |
| 223 if (src_buf[i] < 128) { | |
| 224 uint32_t copy_len = src_buf[i] + 1; | |
| 225 uint32_t buf_left = src_size - i - 1; | |
| 226 if (buf_left < copy_len) { | |
| 227 uint32_t delta = copy_len - buf_left; | |
| 228 copy_len = buf_left; | |
| 229 FXSYS_memset(dest_buf + dest_count + copy_len, '\0', delta); | |
| 230 } | |
| 231 FXSYS_memcpy(dest_buf + dest_count, src_buf + i + 1, copy_len); | |
| 232 dest_count += src_buf[i] + 1; | |
| 233 i += src_buf[i] + 2; | |
| 234 } else { | |
| 235 int fill = 0; | |
| 236 if (i < src_size - 1) { | |
| 237 fill = src_buf[i + 1]; | |
| 238 } | |
| 239 FXSYS_memset(dest_buf + dest_count, fill, 257 - src_buf[i]); | |
| 240 dest_count += 257 - src_buf[i]; | |
| 241 i += 2; | |
| 242 } | |
| 243 } | |
| 244 | |
| 245 return std::min(i + 1, src_size); | |
| 246 } | |
| 247 | |
| 248 CCodec_ScanlineDecoder* FPDFAPI_CreateFaxDecoder( | |
| 249 const uint8_t* src_buf, | |
| 250 uint32_t src_size, | |
| 251 int width, | |
| 252 int height, | |
| 253 const CPDF_Dictionary* pParams) { | |
| 254 int K = 0; | |
| 255 bool EndOfLine = false; | |
| 256 bool ByteAlign = false; | |
| 257 bool BlackIs1 = false; | |
| 258 int Columns = 1728; | |
| 259 int Rows = 0; | |
| 260 if (pParams) { | |
| 261 K = pParams->GetIntegerFor("K"); | |
| 262 EndOfLine = !!pParams->GetIntegerFor("EndOfLine"); | |
| 263 ByteAlign = !!pParams->GetIntegerFor("EncodedByteAlign"); | |
| 264 BlackIs1 = !!pParams->GetIntegerFor("BlackIs1"); | |
| 265 Columns = pParams->GetIntegerFor("Columns", 1728); | |
| 266 Rows = pParams->GetIntegerFor("Rows"); | |
| 267 if (Rows > USHRT_MAX) { | |
| 268 Rows = 0; | |
| 269 } | |
| 270 } | |
| 271 return CPDF_ModuleMgr::Get()->GetFaxModule()->CreateDecoder( | |
| 272 src_buf, src_size, width, height, K, EndOfLine, ByteAlign, BlackIs1, | |
| 273 Columns, Rows); | |
| 274 } | |
| 275 | |
| 276 CCodec_ScanlineDecoder* FPDFAPI_CreateFlateDecoder( | |
| 277 const uint8_t* src_buf, | |
| 278 uint32_t src_size, | |
| 279 int width, | |
| 280 int height, | |
| 281 int nComps, | |
| 282 int bpc, | |
| 283 const CPDF_Dictionary* pParams) { | |
| 284 int predictor = 0; | |
| 285 int Colors = 0, BitsPerComponent = 0, Columns = 0; | |
| 286 if (pParams) { | |
| 287 predictor = pParams->GetIntegerFor("Predictor"); | |
| 288 Colors = pParams->GetIntegerFor("Colors", 1); | |
| 289 BitsPerComponent = pParams->GetIntegerFor("BitsPerComponent", 8); | |
| 290 Columns = pParams->GetIntegerFor("Columns", 1); | |
| 291 if (!CheckFlateDecodeParams(Colors, BitsPerComponent, Columns)) { | |
| 292 return nullptr; | |
| 293 } | |
| 294 } | |
| 295 return CPDF_ModuleMgr::Get()->GetFlateModule()->CreateDecoder( | |
| 296 src_buf, src_size, width, height, nComps, bpc, predictor, Colors, | |
| 297 BitsPerComponent, Columns); | |
| 298 } | |
| 299 | |
| 300 uint32_t FPDFAPI_FlateOrLZWDecode(FX_BOOL bLZW, | |
| 301 const uint8_t* src_buf, | |
| 302 uint32_t src_size, | |
| 303 CPDF_Dictionary* pParams, | |
| 304 uint32_t estimated_size, | |
| 305 uint8_t*& dest_buf, | |
| 306 uint32_t& dest_size) { | |
| 307 int predictor = 0; | |
| 308 FX_BOOL bEarlyChange = TRUE; | |
| 309 int Colors = 0, BitsPerComponent = 0, Columns = 0; | |
| 310 if (pParams) { | |
| 311 predictor = pParams->GetIntegerFor("Predictor"); | |
| 312 bEarlyChange = pParams->GetIntegerFor("EarlyChange", 1); | |
| 313 Colors = pParams->GetIntegerFor("Colors", 1); | |
| 314 BitsPerComponent = pParams->GetIntegerFor("BitsPerComponent", 8); | |
| 315 Columns = pParams->GetIntegerFor("Columns", 1); | |
| 316 if (!CheckFlateDecodeParams(Colors, BitsPerComponent, Columns)) { | |
| 317 return (uint32_t)-1; | |
| 318 } | |
| 319 } | |
| 320 return CPDF_ModuleMgr::Get()->GetFlateModule()->FlateOrLZWDecode( | |
| 321 bLZW, src_buf, src_size, bEarlyChange, predictor, Colors, | |
| 322 BitsPerComponent, Columns, estimated_size, dest_buf, dest_size); | |
| 323 } | |
| 324 | |
| 325 FX_BOOL PDF_DataDecode(const uint8_t* src_buf, | |
| 326 uint32_t src_size, | |
| 327 const CPDF_Dictionary* pDict, | |
| 328 uint8_t*& dest_buf, | |
| 329 uint32_t& dest_size, | |
| 330 CFX_ByteString& ImageEncoding, | |
| 331 CPDF_Dictionary*& pImageParms, | |
| 332 uint32_t last_estimated_size, | |
| 333 FX_BOOL bImageAcc) { | |
| 334 CPDF_Object* pDecoder = pDict ? pDict->GetDirectObjectFor("Filter") : nullptr; | |
| 335 if (!pDecoder || (!pDecoder->IsArray() && !pDecoder->IsName())) | |
| 336 return FALSE; | |
| 337 | |
| 338 CPDF_Object* pParams = | |
| 339 pDict ? pDict->GetDirectObjectFor("DecodeParms") : nullptr; | |
| 340 | |
| 341 std::vector<std::pair<CFX_ByteString, CPDF_Object*>> DecoderArray; | |
| 342 if (CPDF_Array* pDecoders = pDecoder->AsArray()) { | |
| 343 CPDF_Array* pParamsArray = ToArray(pParams); | |
| 344 for (size_t i = 0; i < pDecoders->GetCount(); i++) { | |
| 345 DecoderArray.push_back( | |
| 346 {pDecoders->GetStringAt(i), | |
| 347 pParamsArray ? pParamsArray->GetDictAt(i) : nullptr}); | |
| 348 } | |
| 349 } else { | |
| 350 DecoderArray.push_back( | |
| 351 {pDecoder->GetString(), pParams ? pParams->GetDict() : nullptr}); | |
| 352 } | |
| 353 uint8_t* last_buf = const_cast<uint8_t*>(src_buf); | |
| 354 uint32_t last_size = src_size; | |
| 355 int nSize = pdfium::CollectionSize<int>(DecoderArray); | |
| 356 for (int i = 0; i < nSize; i++) { | |
| 357 int estimated_size = i == nSize - 1 ? last_estimated_size : 0; | |
| 358 CFX_ByteString decoder = DecoderArray[i].first; | |
| 359 CPDF_Dictionary* pParam = ToDictionary(DecoderArray[i].second); | |
| 360 uint8_t* new_buf = nullptr; | |
| 361 uint32_t new_size = (uint32_t)-1; | |
| 362 int offset = -1; | |
| 363 if (decoder == "FlateDecode" || decoder == "Fl") { | |
| 364 if (bImageAcc && i == nSize - 1) { | |
| 365 ImageEncoding = "FlateDecode"; | |
| 366 dest_buf = (uint8_t*)last_buf; | |
| 367 dest_size = last_size; | |
| 368 pImageParms = pParam; | |
| 369 return TRUE; | |
| 370 } | |
| 371 offset = FPDFAPI_FlateOrLZWDecode(FALSE, last_buf, last_size, pParam, | |
| 372 estimated_size, new_buf, new_size); | |
| 373 } else if (decoder == "LZWDecode" || decoder == "LZW") { | |
| 374 offset = FPDFAPI_FlateOrLZWDecode(TRUE, last_buf, last_size, pParam, | |
| 375 estimated_size, new_buf, new_size); | |
| 376 } else if (decoder == "ASCII85Decode" || decoder == "A85") { | |
| 377 offset = A85Decode(last_buf, last_size, new_buf, new_size); | |
| 378 } else if (decoder == "ASCIIHexDecode" || decoder == "AHx") { | |
| 379 offset = HexDecode(last_buf, last_size, new_buf, new_size); | |
| 380 } else if (decoder == "RunLengthDecode" || decoder == "RL") { | |
| 381 if (bImageAcc && i == nSize - 1) { | |
| 382 ImageEncoding = "RunLengthDecode"; | |
| 383 dest_buf = (uint8_t*)last_buf; | |
| 384 dest_size = last_size; | |
| 385 pImageParms = pParam; | |
| 386 return TRUE; | |
| 387 } | |
| 388 offset = RunLengthDecode(last_buf, last_size, new_buf, new_size); | |
| 389 } else if (decoder == "Crypt") { | |
| 390 continue; | |
| 391 } else { | |
| 392 // If we get here, assume it's an image decoder. | |
| 393 if (decoder == "DCT") { | |
| 394 decoder = "DCTDecode"; | |
| 395 } else if (decoder == "CCF") { | |
| 396 decoder = "CCITTFaxDecode"; | |
| 397 } | |
| 398 ImageEncoding = decoder; | |
| 399 pImageParms = pParam; | |
| 400 dest_buf = (uint8_t*)last_buf; | |
| 401 dest_size = last_size; | |
| 402 if (CPDF_Array* pDecoders = pDecoder->AsArray()) | |
| 403 pDecoders->RemoveAt(i + 1, pDecoders->GetCount() - i - 1); | |
| 404 return TRUE; | |
| 405 } | |
| 406 if (last_buf != src_buf) { | |
| 407 FX_Free(last_buf); | |
| 408 } | |
| 409 if (offset == -1) { | |
| 410 FX_Free(new_buf); | |
| 411 return FALSE; | |
| 412 } | |
| 413 last_buf = new_buf; | |
| 414 last_size = new_size; | |
| 415 } | |
| 416 ImageEncoding = ""; | |
| 417 pImageParms = nullptr; | |
| 418 dest_buf = last_buf; | |
| 419 dest_size = last_size; | |
| 420 return TRUE; | |
| 421 } | |
| 422 | |
| 423 CFX_WideString PDF_DecodeText(const uint8_t* src_data, uint32_t src_len) { | |
| 424 CFX_WideString result; | |
| 425 if (src_len >= 2 && ((src_data[0] == 0xfe && src_data[1] == 0xff) || | |
| 426 (src_data[0] == 0xff && src_data[1] == 0xfe))) { | |
| 427 bool bBE = src_data[0] == 0xfe; | |
| 428 uint32_t max_chars = (src_len - 2) / 2; | |
| 429 if (!max_chars) { | |
| 430 return result; | |
| 431 } | |
| 432 if (src_data[0] == 0xff) { | |
| 433 bBE = !src_data[2]; | |
| 434 } | |
| 435 FX_WCHAR* dest_buf = result.GetBuffer(max_chars); | |
| 436 const uint8_t* uni_str = src_data + 2; | |
| 437 int dest_pos = 0; | |
| 438 for (uint32_t i = 0; i < max_chars * 2; i += 2) { | |
| 439 uint16_t unicode = bBE ? (uni_str[i] << 8 | uni_str[i + 1]) | |
| 440 : (uni_str[i + 1] << 8 | uni_str[i]); | |
| 441 if (unicode == 0x1b) { | |
| 442 i += 2; | |
| 443 while (i < max_chars * 2) { | |
| 444 uint16_t unicode2 = bBE ? (uni_str[i] << 8 | uni_str[i + 1]) | |
| 445 : (uni_str[i + 1] << 8 | uni_str[i]); | |
| 446 i += 2; | |
| 447 if (unicode2 == 0x1b) | |
| 448 break; | |
| 449 } | |
| 450 } else { | |
| 451 dest_buf[dest_pos++] = unicode; | |
| 452 } | |
| 453 } | |
| 454 result.ReleaseBuffer(dest_pos); | |
| 455 } else { | |
| 456 FX_WCHAR* dest_buf = result.GetBuffer(src_len); | |
| 457 for (uint32_t i = 0; i < src_len; i++) | |
| 458 dest_buf[i] = PDFDocEncoding[src_data[i]]; | |
| 459 result.ReleaseBuffer(src_len); | |
| 460 } | |
| 461 return result; | |
| 462 } | |
| 463 | |
| 464 CFX_WideString PDF_DecodeText(const CFX_ByteString& bstr) { | |
| 465 return PDF_DecodeText((const uint8_t*)bstr.c_str(), bstr.GetLength()); | |
| 466 } | |
| 467 | |
| 468 CFX_ByteString PDF_EncodeText(const FX_WCHAR* pString, int len) { | |
| 469 if (len == -1) { | |
| 470 len = FXSYS_wcslen(pString); | |
| 471 } | |
| 472 CFX_ByteString result; | |
| 473 FX_CHAR* dest_buf1 = result.GetBuffer(len); | |
| 474 int i; | |
| 475 for (i = 0; i < len; i++) { | |
| 476 int code; | |
| 477 for (code = 0; code < 256; code++) | |
| 478 if (PDFDocEncoding[code] == pString[i]) { | |
| 479 break; | |
| 480 } | |
| 481 if (code == 256) { | |
| 482 break; | |
| 483 } | |
| 484 dest_buf1[i] = code; | |
| 485 } | |
| 486 result.ReleaseBuffer(i); | |
| 487 if (i == len) { | |
| 488 return result; | |
| 489 } | |
| 490 | |
| 491 if (len > INT_MAX / 2 - 1) { | |
| 492 result.ReleaseBuffer(0); | |
| 493 return result; | |
| 494 } | |
| 495 | |
| 496 int encLen = len * 2 + 2; | |
| 497 | |
| 498 uint8_t* dest_buf2 = (uint8_t*)result.GetBuffer(encLen); | |
| 499 dest_buf2[0] = 0xfe; | |
| 500 dest_buf2[1] = 0xff; | |
| 501 dest_buf2 += 2; | |
| 502 for (int j = 0; j < len; j++) { | |
| 503 *dest_buf2++ = pString[i] >> 8; | |
| 504 *dest_buf2++ = (uint8_t)pString[j]; | |
| 505 } | |
| 506 result.ReleaseBuffer(encLen); | |
| 507 return result; | |
| 508 } | |
| 509 | |
| 510 CFX_ByteString PDF_EncodeText(const CFX_WideString& str) { | |
| 511 return PDF_EncodeText(str.c_str(), str.GetLength()); | |
| 512 } | |
| 513 | |
| 514 CFX_ByteString PDF_EncodeString(const CFX_ByteString& src, FX_BOOL bHex) { | |
| 515 CFX_ByteTextBuf result; | |
| 516 int srclen = src.GetLength(); | |
| 517 if (bHex) { | |
| 518 result.AppendChar('<'); | |
| 519 for (int i = 0; i < srclen; i++) { | |
| 520 result.AppendChar("0123456789ABCDEF"[src[i] / 16]); | |
| 521 result.AppendChar("0123456789ABCDEF"[src[i] % 16]); | |
| 522 } | |
| 523 result.AppendChar('>'); | |
| 524 return result.MakeString(); | |
| 525 } | |
| 526 result.AppendChar('('); | |
| 527 for (int i = 0; i < srclen; i++) { | |
| 528 uint8_t ch = src[i]; | |
| 529 if (ch == 0x0a) { | |
| 530 result << "\\n"; | |
| 531 continue; | |
| 532 } | |
| 533 if (ch == 0x0d) { | |
| 534 result << "\\r"; | |
| 535 continue; | |
| 536 } | |
| 537 if (ch == ')' || ch == '\\' || ch == '(') | |
| 538 result.AppendChar('\\'); | |
| 539 result.AppendChar(ch); | |
| 540 } | |
| 541 result.AppendChar(')'); | |
| 542 return result.MakeString(); | |
| 543 } | |
| 544 | |
| 545 bool FlateEncode(const uint8_t* src_buf, | |
| 546 uint32_t src_size, | |
| 547 uint8_t** dest_buf, | |
| 548 uint32_t* dest_size) { | |
| 549 CCodec_ModuleMgr* pEncoders = CPDF_ModuleMgr::Get()->GetCodecModule(); | |
| 550 return pEncoders && | |
| 551 pEncoders->GetFlateModule()->Encode(src_buf, src_size, dest_buf, | |
| 552 dest_size); | |
| 553 } | |
| 554 | |
| 555 bool PngEncode(const uint8_t* src_buf, | |
| 556 uint32_t src_size, | |
| 557 uint8_t** dest_buf, | |
| 558 uint32_t* dest_size) { | |
| 559 CCodec_ModuleMgr* pEncoders = CPDF_ModuleMgr::Get()->GetCodecModule(); | |
| 560 return pEncoders && | |
| 561 pEncoders->GetFlateModule()->PngEncode(src_buf, src_size, dest_buf, | |
| 562 dest_size); | |
| 563 } | |
| 564 | |
| 565 uint32_t FlateDecode(const uint8_t* src_buf, | |
| 566 uint32_t src_size, | |
| 567 uint8_t*& dest_buf, | |
| 568 uint32_t& dest_size) { | |
| 569 CCodec_ModuleMgr* pEncoders = CPDF_ModuleMgr::Get()->GetCodecModule(); | |
| 570 if (pEncoders) { | |
| 571 return pEncoders->GetFlateModule()->FlateOrLZWDecode( | |
| 572 FALSE, src_buf, src_size, FALSE, 0, 0, 0, 0, 0, dest_buf, dest_size); | |
| 573 } | |
| 574 return 0; | |
| 575 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2392603004:
Move core/fpdfapi/fpdf_parser to core/fpdfapi/parser (Closed)
