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| 1 <?php | |
| 2 | |
| 3 // Protocol Buffers - Google's data interchange format | |
| 4 // Copyright 2008 Google Inc. All rights reserved. | |
| 5 // https://developers.google.com/protocol-buffers/ | |
| 6 // | |
| 7 // Redistribution and use in source and binary forms, with or without | |
| 8 // modification, are permitted provided that the following conditions are | |
| 9 // met: | |
| 10 // | |
| 11 // * Redistributions of source code must retain the above copyright | |
| 12 // notice, this list of conditions and the following disclaimer. | |
| 13 // * Redistributions in binary form must reproduce the above | |
| 14 // copyright notice, this list of conditions and the following disclaimer | |
| 15 // in the documentation and/or other materials provided with the | |
| 16 // distribution. | |
| 17 // * Neither the name of Google Inc. nor the names of its | |
| 18 // contributors may be used to endorse or promote products derived from | |
| 19 // this software without specific prior written permission. | |
| 20 // | |
| 21 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 22 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 23 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 24 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 25 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 26 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 27 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 28 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 29 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 30 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 31 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 32 | |
| 33 namespace Google\Protobuf\Internal; | |
| 34 | |
| 35 class GPBWire | |
| 36 { | |
| 37 | |
| 38 const TAG_TYPE_BITS = 3; | |
| 39 | |
| 40 const WIRETYPE_VARINT = 0; | |
| 41 const WIRETYPE_FIXED64 = 1; | |
| 42 const WIRETYPE_LENGTH_DELIMITED = 2; | |
| 43 const WIRETYPE_START_GROUP = 3; | |
| 44 const WIRETYPE_END_GROUP = 4; | |
| 45 const WIRETYPE_FIXED32 = 5; | |
| 46 | |
| 47 const UNKNOWN = 0; | |
| 48 const NORMAL_FORMAT = 1; | |
| 49 const PACKED_FORMAT = 2; | |
| 50 | |
| 51 public static function getTagFieldNumber($tag) | |
| 52 { | |
| 53 return ($tag >> self::TAG_TYPE_BITS) & | |
| 54 (1 << ((PHP_INT_SIZE * 8) - self::TAG_TYPE_BITS)) - 1; | |
| 55 } | |
| 56 | |
| 57 public static function getTagWireType($tag) | |
| 58 { | |
| 59 return $tag & 0x7; | |
| 60 } | |
| 61 | |
| 62 public static function getWireType($type) | |
| 63 { | |
| 64 switch ($type) { | |
| 65 case GPBType::FLOAT: | |
| 66 case GPBType::FIXED32: | |
| 67 case GPBType::SFIXED32: | |
| 68 return self::WIRETYPE_FIXED32; | |
| 69 case GPBType::DOUBLE: | |
| 70 case GPBType::FIXED64: | |
| 71 case GPBType::SFIXED64: | |
| 72 return self::WIRETYPE_FIXED64; | |
| 73 case GPBType::UINT32: | |
| 74 case GPBType::UINT64: | |
| 75 case GPBType::INT32: | |
| 76 case GPBType::INT64: | |
| 77 case GPBType::SINT32: | |
| 78 case GPBType::SINT64: | |
| 79 case GPBType::ENUM: | |
| 80 case GPBType::BOOL: | |
| 81 return self::WIRETYPE_VARINT; | |
| 82 case GPBType::STRING: | |
| 83 case GPBType::BYTES: | |
| 84 case GPBType::MESSAGE: | |
| 85 return self::WIRETYPE_LENGTH_DELIMITED; | |
| 86 case GPBType::GROUP: | |
| 87 user_error("Unsupported type."); | |
| 88 return 0; | |
| 89 default: | |
| 90 user_error("Unsupported type."); | |
| 91 return 0; | |
| 92 } | |
| 93 } | |
| 94 | |
| 95 // ZigZag Transform: Encodes signed integers so that they can be effectively | |
| 96 // used with varint encoding. | |
| 97 // | |
| 98 // varint operates on unsigned integers, encoding smaller numbers into fewer | |
| 99 // bytes. If you try to use it on a signed integer, it will treat this | |
| 100 // number as a very large unsigned integer, which means that even small | |
| 101 // signed numbers like -1 will take the maximum number of bytes (10) to | |
| 102 // encode. zigZagEncode() maps signed integers to unsigned in such a way | |
| 103 // that those with a small absolute value will have smaller encoded values, | |
| 104 // making them appropriate for encoding using varint. | |
| 105 // | |
| 106 // int32 -> uint32 | |
| 107 // ------------------------- | |
| 108 // 0 -> 0 | |
| 109 // -1 -> 1 | |
| 110 // 1 -> 2 | |
| 111 // -2 -> 3 | |
| 112 // ... -> ... | |
| 113 // 2147483647 -> 4294967294 | |
| 114 // -2147483648 -> 4294967295 | |
| 115 // | |
| 116 // >> encode >> | |
| 117 // << decode << | |
| 118 public static function zigZagEncode32($int32) | |
| 119 { | |
| 120 // Fill high 32 bits. | |
| 121 if (PHP_INT_SIZE === 8) { | |
| 122 $int32 |= ((($int32 << 32) >> 31) & (0xFFFFFFFF << 32)); | |
| 123 } | |
| 124 | |
| 125 $uint32 = ($int32 << 1) ^ ($int32 >> 31); | |
| 126 | |
| 127 // Fill high 32 bits. | |
| 128 if (PHP_INT_SIZE === 8) { | |
| 129 $uint32 |= ((($uint32 << 32) >> 31) & (0xFFFFFFFF << 32)); | |
| 130 } | |
| 131 | |
| 132 return $uint32; | |
| 133 } | |
| 134 | |
| 135 public static function zigZagDecode32($uint32) | |
| 136 { | |
| 137 // Fill high 32 bits. | |
| 138 if (PHP_INT_SIZE === 8) { | |
| 139 $uint32 |= ($uint32 & 0xFFFFFFFF); | |
| 140 } | |
| 141 | |
| 142 $int32 = (($uint32 >> 1) & 0x7FFFFFFF) ^ (-($uint32 & 1)); | |
| 143 | |
| 144 return $int32; | |
| 145 } | |
| 146 | |
| 147 public static function zigZagEncode64($int64) | |
| 148 { | |
| 149 if (PHP_INT_SIZE == 4) { | |
| 150 if (bccomp($int64, 0) >= 0) { | |
| 151 return bcmul($int64, 2); | |
| 152 } else { | |
| 153 return bcsub(bcmul(bcsub(0, $int64), 2), 1); | |
| 154 } | |
| 155 } else { | |
| 156 return ($int64 << 1) ^ ($int64 >> 63); | |
| 157 } | |
| 158 } | |
| 159 | |
| 160 public static function zigZagDecode64($uint64) | |
| 161 { | |
| 162 if (PHP_INT_SIZE == 4) { | |
| 163 if (bcmod($uint64, 2) == 0) { | |
| 164 return bcdiv($uint64, 2, 0); | |
| 165 } else { | |
| 166 return bcsub(0, bcdiv(bcadd($uint64, 1), 2, 0)); | |
| 167 } | |
| 168 } else { | |
| 169 return (($uint64 >> 1) & 0x7FFFFFFFFFFFFFFF) ^ (-($uint64 & 1)); | |
| 170 } | |
| 171 } | |
| 172 | |
| 173 public static function readInt32(&$input, &$value) | |
| 174 { | |
| 175 return $input->readVarint32($value); | |
| 176 } | |
| 177 | |
| 178 public static function readInt64(&$input, &$value) | |
| 179 { | |
| 180 return $input->readVarint64($value); | |
| 181 } | |
| 182 | |
| 183 public static function readUint32(&$input, &$value) | |
| 184 { | |
| 185 return self::readInt32($input, $value); | |
| 186 } | |
| 187 | |
| 188 public static function readUint64(&$input, &$value) | |
| 189 { | |
| 190 return self::readInt64($input, $value); | |
| 191 } | |
| 192 | |
| 193 public static function readSint32(&$input, &$value) | |
| 194 { | |
| 195 if (!$input->readVarint32($value)) { | |
| 196 return false; | |
| 197 } | |
| 198 $value = GPBWire::zigZagDecode32($value); | |
| 199 return true; | |
| 200 } | |
| 201 | |
| 202 public static function readSint64(&$input, &$value) | |
| 203 { | |
| 204 if (!$input->readVarint64($value)) { | |
| 205 return false; | |
| 206 } | |
| 207 $value = GPBWire::zigZagDecode64($value); | |
| 208 return true; | |
| 209 } | |
| 210 | |
| 211 public static function readFixed32(&$input, &$value) | |
| 212 { | |
| 213 return $input->readLittleEndian32($value); | |
| 214 } | |
| 215 | |
| 216 public static function readFixed64(&$input, &$value) | |
| 217 { | |
| 218 return $input->readLittleEndian64($value); | |
| 219 } | |
| 220 | |
| 221 public static function readSfixed32(&$input, &$value) | |
| 222 { | |
| 223 if (!self::readFixed32($input, $value)) { | |
| 224 return false; | |
| 225 } | |
| 226 if (PHP_INT_SIZE === 8) { | |
| 227 $value |= (-($value >> 31) << 32); | |
| 228 } | |
| 229 return true; | |
| 230 } | |
| 231 | |
| 232 public static function readSfixed64(&$input, &$value) | |
| 233 { | |
| 234 return $input->readLittleEndian64($value); | |
| 235 } | |
| 236 | |
| 237 public static function readFloat(&$input, &$value) | |
| 238 { | |
| 239 $data = null; | |
| 240 if (!$input->readRaw(4, $data)) { | |
| 241 return false; | |
| 242 } | |
| 243 $value = unpack('f', $data)[1]; | |
| 244 return true; | |
| 245 } | |
| 246 | |
| 247 public static function readDouble(&$input, &$value) | |
| 248 { | |
| 249 $data = null; | |
| 250 if (!$input->readRaw(8, $data)) { | |
| 251 return false; | |
| 252 } | |
| 253 $value = unpack('d', $data)[1]; | |
| 254 return true; | |
| 255 } | |
| 256 | |
| 257 public static function readBool(&$input, &$value) | |
| 258 { | |
| 259 if (!$input->readVarint64($value)) { | |
| 260 return false; | |
| 261 } | |
| 262 if ($value == 0) { | |
| 263 $value = false; | |
| 264 } else { | |
| 265 $value = true; | |
| 266 } | |
| 267 return true; | |
| 268 } | |
| 269 | |
| 270 public static function readString(&$input, &$value) | |
| 271 { | |
| 272 $length = 0; | |
| 273 return $input->readVarintSizeAsInt($length) && $input->readRaw($length,
$value); | |
| 274 } | |
| 275 | |
| 276 public static function readMessage(&$input, &$message) | |
| 277 { | |
| 278 $length = 0; | |
| 279 if (!$input->readVarintSizeAsInt($length)) { | |
| 280 return false; | |
| 281 } | |
| 282 $old_limit = 0; | |
| 283 $recursion_limit = 0; | |
| 284 $input->incrementRecursionDepthAndPushLimit( | |
| 285 $length, | |
| 286 $old_limit, | |
| 287 $recursion_limit); | |
| 288 if ($recursion_limit < 0 || !$message->parseFromStream($input)) { | |
| 289 return false; | |
| 290 } | |
| 291 return $input->decrementRecursionDepthAndPopLimit($old_limit); | |
| 292 } | |
| 293 | |
| 294 public static function writeTag(&$output, $tag) | |
| 295 { | |
| 296 return $output->writeTag($tag); | |
| 297 } | |
| 298 | |
| 299 public static function writeInt32(&$output, $value) | |
| 300 { | |
| 301 return $output->writeVarint32($value); | |
| 302 } | |
| 303 | |
| 304 public static function writeInt64(&$output, $value) | |
| 305 { | |
| 306 return $output->writeVarint64($value); | |
| 307 } | |
| 308 | |
| 309 public static function writeUint32(&$output, $value) | |
| 310 { | |
| 311 return $output->writeVarint32($value); | |
| 312 } | |
| 313 | |
| 314 public static function writeUint64(&$output, $value) | |
| 315 { | |
| 316 return $output->writeVarint64($value); | |
| 317 } | |
| 318 | |
| 319 public static function writeSint32(&$output, $value) | |
| 320 { | |
| 321 $value = GPBWire::zigZagEncode32($value); | |
| 322 return $output->writeVarint64($value); | |
| 323 } | |
| 324 | |
| 325 public static function writeSint64(&$output, $value) | |
| 326 { | |
| 327 $value = GPBWire::zigZagEncode64($value); | |
| 328 return $output->writeVarint64($value); | |
| 329 } | |
| 330 | |
| 331 public static function writeFixed32(&$output, $value) | |
| 332 { | |
| 333 return $output->writeLittleEndian32($value); | |
| 334 } | |
| 335 | |
| 336 public static function writeFixed64(&$output, $value) | |
| 337 { | |
| 338 return $output->writeLittleEndian64($value); | |
| 339 } | |
| 340 | |
| 341 public static function writeSfixed32(&$output, $value) | |
| 342 { | |
| 343 return $output->writeLittleEndian32($value); | |
| 344 } | |
| 345 | |
| 346 public static function writeSfixed64(&$output, $value) | |
| 347 { | |
| 348 return $output->writeLittleEndian64($value); | |
| 349 } | |
| 350 | |
| 351 public static function writeBool(&$output, $value) | |
| 352 { | |
| 353 if ($value) { | |
| 354 return $output->writeVarint32(1); | |
| 355 } else { | |
| 356 return $output->writeVarint32(0); | |
| 357 } | |
| 358 } | |
| 359 | |
| 360 public static function writeFloat(&$output, $value) | |
| 361 { | |
| 362 $data = pack("f", $value); | |
| 363 return $output->writeRaw($data, 4); | |
| 364 } | |
| 365 | |
| 366 public static function writeDouble(&$output, $value) | |
| 367 { | |
| 368 $data = pack("d", $value); | |
| 369 return $output->writeRaw($data, 8); | |
| 370 } | |
| 371 | |
| 372 public static function writeString(&$output, $value) | |
| 373 { | |
| 374 return self::writeBytes($output, $value); | |
| 375 } | |
| 376 | |
| 377 public static function writeBytes(&$output, $value) | |
| 378 { | |
| 379 $size = strlen($value); | |
| 380 if (!$output->writeVarint32($size)) { | |
| 381 return false; | |
| 382 } | |
| 383 return $output->writeRaw($value, $size); | |
| 384 } | |
| 385 | |
| 386 public static function writeMessage(&$output, $value) | |
| 387 { | |
| 388 $size = $value->byteSize(); | |
| 389 if (!$output->writeVarint32($size)) { | |
| 390 return false; | |
| 391 } | |
| 392 return $value->serializeToStream($output); | |
| 393 } | |
| 394 | |
| 395 public static function makeTag($number, $type) | |
| 396 { | |
| 397 return ($number << 3) | self::getWireType($type); | |
| 398 } | |
| 399 | |
| 400 public static function tagSize($field) | |
| 401 { | |
| 402 $tag = self::makeTag($field->getNumber(), $field->getType()); | |
| 403 return self::varint32Size($tag); | |
| 404 } | |
| 405 | |
| 406 public static function varint32Size($value) | |
| 407 { | |
| 408 if ($value < 0) { | |
| 409 return 5; | |
| 410 } | |
| 411 if ($value < (1 << 7)) { | |
| 412 return 1; | |
| 413 } | |
| 414 if ($value < (1 << 14)) { | |
| 415 return 2; | |
| 416 } | |
| 417 if ($value < (1 << 21)) { | |
| 418 return 3; | |
| 419 } | |
| 420 if ($value < (1 << 28)) { | |
| 421 return 4; | |
| 422 } | |
| 423 return 5; | |
| 424 } | |
| 425 | |
| 426 public static function sint32Size($value) | |
| 427 { | |
| 428 $value = self::zigZagEncode32($value); | |
| 429 return self::varint32Size($value); | |
| 430 } | |
| 431 | |
| 432 public static function sint64Size($value) | |
| 433 { | |
| 434 $value = self::zigZagEncode64($value); | |
| 435 return self::varint64Size($value); | |
| 436 } | |
| 437 | |
| 438 public static function varint64Size($value) | |
| 439 { | |
| 440 if ($value < 0) { | |
| 441 return 10; | |
| 442 } | |
| 443 if ($value < (1 << 7)) { | |
| 444 return 1; | |
| 445 } | |
| 446 if ($value < (1 << 14)) { | |
| 447 return 2; | |
| 448 } | |
| 449 if ($value < (1 << 21)) { | |
| 450 return 3; | |
| 451 } | |
| 452 if ($value < (1 << 28)) { | |
| 453 return 4; | |
| 454 } | |
| 455 if ($value < (1 << 35)) { | |
| 456 return 5; | |
| 457 } | |
| 458 if ($value < (1 << 42)) { | |
| 459 return 6; | |
| 460 } | |
| 461 if ($value < (1 << 49)) { | |
| 462 return 7; | |
| 463 } | |
| 464 if ($value < (1 << 56)) { | |
| 465 return 8; | |
| 466 } | |
| 467 return 9; | |
| 468 } | |
| 469 | |
| 470 public static function serializeFieldToStream( | |
| 471 $value, | |
| 472 $field, | |
| 473 $need_tag, | |
| 474 &$output) | |
| 475 { | |
| 476 if ($need_tag) { | |
| 477 if (!GPBWire::writeTag( | |
| 478 $output, | |
| 479 self::makeTag( | |
| 480 $field->getNumber(), | |
| 481 $field->getType()))) { | |
| 482 return false; | |
| 483 } | |
| 484 } | |
| 485 switch ($field->getType()) { | |
| 486 case GPBType::DOUBLE: | |
| 487 if (!GPBWire::writeDouble($output, $value)) { | |
| 488 return false; | |
| 489 } | |
| 490 break; | |
| 491 case GPBType::FLOAT: | |
| 492 if (!GPBWire::writeFloat($output, $value)) { | |
| 493 return false; | |
| 494 } | |
| 495 break; | |
| 496 case GPBType::INT64: | |
| 497 if (!GPBWire::writeInt64($output, $value)) { | |
| 498 return false; | |
| 499 } | |
| 500 break; | |
| 501 case GPBType::UINT64: | |
| 502 if (!GPBWire::writeUint64($output, $value)) { | |
| 503 return false; | |
| 504 } | |
| 505 break; | |
| 506 case GPBType::INT32: | |
| 507 if (!GPBWire::writeInt32($output, $value)) { | |
| 508 return false; | |
| 509 } | |
| 510 break; | |
| 511 case GPBType::FIXED32: | |
| 512 if (!GPBWire::writeFixed32($output, $value)) { | |
| 513 return false; | |
| 514 } | |
| 515 break; | |
| 516 case GPBType::FIXED64: | |
| 517 if (!GPBWire::writeFixed64($output, $value)) { | |
| 518 return false; | |
| 519 } | |
| 520 break; | |
| 521 case GPBType::BOOL: | |
| 522 if (!GPBWire::writeBool($output, $value)) { | |
| 523 return false; | |
| 524 } | |
| 525 break; | |
| 526 case GPBType::STRING: | |
| 527 if (!GPBWire::writeString($output, $value)) { | |
| 528 return false; | |
| 529 } | |
| 530 break; | |
| 531 // case GPBType::GROUP: | |
| 532 // echo "GROUP\xA"; | |
| 533 // trigger_error("Not implemented.", E_ERROR); | |
| 534 // break; | |
| 535 case GPBType::MESSAGE: | |
| 536 if (!GPBWire::writeMessage($output, $value)) { | |
| 537 return false; | |
| 538 } | |
| 539 break; | |
| 540 case GPBType::BYTES: | |
| 541 if (!GPBWire::writeBytes($output, $value)) { | |
| 542 return false; | |
| 543 } | |
| 544 break; | |
| 545 case GPBType::UINT32: | |
| 546 if (!GPBWire::writeUint32($output, $value)) { | |
| 547 return false; | |
| 548 } | |
| 549 break; | |
| 550 case GPBType::ENUM: | |
| 551 if (!GPBWire::writeInt32($output, $value)) { | |
| 552 return false; | |
| 553 } | |
| 554 break; | |
| 555 case GPBType::SFIXED32: | |
| 556 if (!GPBWire::writeSfixed32($output, $value)) { | |
| 557 return false; | |
| 558 } | |
| 559 break; | |
| 560 case GPBType::SFIXED64: | |
| 561 if (!GPBWire::writeSfixed64($output, $value)) { | |
| 562 return false; | |
| 563 } | |
| 564 break; | |
| 565 case GPBType::SINT32: | |
| 566 if (!GPBWire::writeSint32($output, $value)) { | |
| 567 return false; | |
| 568 } | |
| 569 break; | |
| 570 case GPBType::SINT64: | |
| 571 if (!GPBWire::writeSint64($output, $value)) { | |
| 572 return false; | |
| 573 } | |
| 574 break; | |
| 575 default: | |
| 576 user_error("Unsupported type."); | |
| 577 return false; | |
| 578 } | |
| 579 | |
| 580 return true; | |
| 581 } | |
| 582 } | |
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Chromium Code Reviews
Issue 2600753002:
Reverts third_party/protobuf: Update to HEAD (f52e188fe4) (Closed)
