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GeezerVison is showing github.com — msgpack-javascript/src/Decoder.ts at main · msgpack/msgpack-javascript Expand file tree/ Copy pathDecoder.tsMore file actions 880 lines (766 loc) · 24.6 KB / Copy pathDecoder.tsFile metadata and controls880 lines (766 loc) · 24.6 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 import { prettyByte } from "./utils/prettyByte.ts"; import { ExtensionCodec } from "./ExtensionCodec.ts"; import { getInt64, getUint64, UINT32_MAX } from "./utils/int.ts"; import { utf8Decode } from "./utils/utf8.ts"; import { ensureUint8Array } from "./utils/typedArrays.ts"; import { CachedKeyDecoder } from "./CachedKeyDecoder.ts"; import { DecodeError } from "./DecodeError.ts"; import type { ContextOf } from "./context.ts"; import type { ExtensionCodecType } from "./ExtensionCodec.ts"; import type { KeyDecoder } from "./CachedKeyDecoder.ts"; export type DecoderOptions<ContextType = undefined> = Readonly< Partial<{ extensionCodec: ExtensionCodecType<ContextType>; /** * Decodes Int64 and Uint64 as bigint if it's set to true. * Depends on ES2020's {@link DataView#getBigInt64} and * {@link DataView#getBigUint64}. * * Defaults to false. */ useBigInt64: boolean; /** * By default, string values will be decoded as UTF-8 strings. However, if this option is true, * string values will be returned as Uint8Arrays without additional decoding. * * This is useful if the strings may contain invalid UTF-8 sequences. * * Note that this option only applies to string values, not map keys. Additionally, when * enabled, raw string length is limited by the maxBinLength option. */ rawStrings: boolean; /** * Maximum string length. * * Defaults to 4_294_967_295 (UINT32_MAX). */ maxStrLength: number; /** * Maximum binary length. * * Defaults to 4_294_967_295 (UINT32_MAX). */ maxBinLength: number; /** * Maximum array length. * * Defaults to 4_294_967_295 (UINT32_MAX). */ maxArrayLength: number; /** * Maximum map length. * * Defaults to 4_294_967_295 (UINT32_MAX). */ maxMapLength: number; /** * Maximum extension length. * * Defaults to 4_294_967_295 (UINT32_MAX). */ maxExtLength: number; /** * An object key decoder. Defaults to the shared instance of {@link CachedKeyDecoder}. * `null` is a special value to disable the use of the key decoder at all. */ keyDecoder: KeyDecoder | null; /** * A function to convert decoded map key to a valid JS key type. * * Defaults to a function that throws an error if the key is not a string or a number. */ mapKeyConverter: (key: unknown) => MapKeyType; }> > & ContextOf<ContextType>; const STATE_ARRAY = "array"; const STATE_MAP_KEY = "map_key"; const STATE_MAP_VALUE = "map_value"; type MapKeyType = string | number; const mapKeyConverter = (key: unknown): MapKeyType => { if (typeof key === "string" || typeof key === "number") { return key; } throw new DecodeError("The type of key must be string or number but " + typeof key); }; type StackMapState = { type: typeof STATE_MAP_KEY | typeof STATE_MAP_VALUE; size: number; key: MapKeyType | null; readCount: number; map: Record<string, unknown>; }; type StackArrayState = { type: typeof STATE_ARRAY; size: number; array: Array<unknown>; position: number; }; class StackPool { private readonly stack: Array<StackState> = []; private stackHeadPosition = -1; public get length(): number { return this.stackHeadPosition + 1; } public top(): StackState | undefined { return this.stack[this.stackHeadPosition]; } public pushArrayState(size: number) { const state = this.getUninitializedStateFromPool() as StackArrayState; state.type = STATE_ARRAY; state.position = 0; state.size = size; state.array = new Array(size); } public pushMapState(size: number) { const state = this.getUninitializedStateFromPool() as StackMapState; state.type = STATE_MAP_KEY; state.readCount = 0; state.size = size; state.map = {}; } private getUninitializedStateFromPool() { this.stackHeadPosition++; if (this.stackHeadPosition === this.stack.length) { const partialState: Partial<StackState> = { type: undefined, size: 0, array: undefined, position: 0, readCount: 0, map: undefined, key: null, }; this.stack.push(partialState as StackState); } return this.stack[this.stackHeadPosition]; } public release(state: StackState): void { const topStackState = this.stack[this.stackHeadPosition]; if (topStackState !== state) { throw new Error("Invalid stack state. Released state is not on top of the stack."); } if (state.type === STATE_ARRAY) { const partialState = state as Partial<StackArrayState>; partialState.size = 0; partialState.array = undefined; partialState.position = 0; partialState.type = undefined; } if (state.type === STATE_MAP_KEY || state.type === STATE_MAP_VALUE) { const partialState = state as Partial<StackMapState>; partialState.size = 0; partialState.map = undefined; partialState.readCount = 0; partialState.type = undefined; } this.stackHeadPosition--; } public reset(): void { this.stack.length = 0; this.stackHeadPosition = -1; } } type StackState = StackArrayState | StackMapState; const HEAD_BYTE_REQUIRED = -1; const EMPTY_VIEW = new DataView<ArrayBufferLike>(new ArrayBuffer(0)); const EMPTY_BYTES = new Uint8Array<ArrayBufferLike>(EMPTY_VIEW.buffer); try { // IE11: The spec says it should throw RangeError, // IE11: but in IE11 it throws TypeError. EMPTY_VIEW.getInt8(0); } catch (e) { if (!(e instanceof RangeError)) { throw new Error( "This module is not supported in the current JavaScript engine because DataView does not throw RangeError on out-of-bounds access", ); } } const MORE_DATA = new RangeError("Insufficient data"); const sharedCachedKeyDecoder = new CachedKeyDecoder(); export class Decoder<ContextType = undefined> { private readonly extensionCodec: ExtensionCodecType<ContextType>; private readonly context: ContextType; private readonly useBigInt64: boolean; private readonly rawStrings: boolean; private readonly maxStrLength: number; private readonly maxBinLength: number; private readonly maxArrayLength: number; private readonly maxMapLength: number; private readonly maxExtLength: number; private readonly keyDecoder: KeyDecoder | null; private readonly mapKeyConverter: (key: unknown) => MapKeyType; private totalPos = 0; private pos = 0; private view = EMPTY_VIEW; private bytes = EMPTY_BYTES; private headByte = HEAD_BYTE_REQUIRED; private readonly stack = new StackPool(); private entered = false; public constructor(options?: DecoderOptions<ContextType>) { this.extensionCodec = options?.extensionCodec ?? (ExtensionCodec.defaultCodec as ExtensionCodecType<ContextType>); this.context = (options as { context: ContextType } | undefined)?.context as ContextType; // needs a type assertion because EncoderOptions has no context property when ContextType is undefined this.useBigInt64 = options?.useBigInt64 ?? false; this.rawStrings = options?.rawStrings ?? false; this.maxStrLength = options?.maxStrLength ?? UINT32_MAX; this.maxBinLength = options?.maxBinLength ?? UINT32_MAX; this.maxArrayLength = options?.maxArrayLength ?? UINT32_MAX; this.maxMapLength = options?.maxMapLength ?? UINT32_MAX; this.maxExtLength = options?.maxExtLength ?? UINT32_MAX; this.keyDecoder = options?.keyDecoder !== undefined ? options.keyDecoder : sharedCachedKeyDecoder; this.mapKeyConverter = options?.mapKeyConverter ?? mapKeyConverter; } private clone(): Decoder<ContextType> { // eslint-disable-next-line @typescript-eslint/no-unsafe-argument return new Decoder({ extensionCodec: this.extensionCodec, context: this.context, useBigInt64: this.useBigInt64, rawStrings: this.rawStrings, maxStrLength: this.maxStrLength, maxBinLength: this.maxBinLength, maxArrayLength: this.maxArrayLength, maxMapLength: this.maxMapLength, maxExtLength: this.maxExtLength, keyDecoder: this.keyDecoder, } as any); } private reinitializeState() { this.totalPos = 0; this.headByte = HEAD_BYTE_REQUIRED; this.stack.reset(); // view, bytes, and pos will be re-initialized in setBuffer() } private setBuffer(buffer: ArrayLike<number> | ArrayBufferView | ArrayBufferLike): void { const bytes = ensureUint8Array(buffer); this.bytes = bytes; this.view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength); this.pos = 0; } private appendBuffer(buffer: ArrayLike<number> | ArrayBufferView | ArrayBufferLike): void { if (this.headByte === HEAD_BYTE_REQUIRED && !this.hasRemaining(1)) { this.setBuffer(buffer); } else { const remainingData = this.bytes.subarray(this.pos); const newData = ensureUint8Array(buffer); // concat remainingData + newData const newBuffer = new Uint8Array(remainingData.length + newData.length); newBuffer.set(remainingData); newBuffer.set(newData, remainingData.length); this.setBuffer(newBuffer); } } private hasRemaining(size: number) { return this.view.byteLength - this.pos >= size; } private createExtraByteError(posToShow: number): Error { const { view, pos } = this; return new RangeError(`Extra ${view.byteLength - pos} of ${view.byteLength} byte(s) found at buffer[${posToShow}]`); } /** * @throws {@link DecodeError} * @throws {@link RangeError} */ public decode(buffer: ArrayLike<number> | ArrayBufferView | ArrayBufferLike): unknown { if (this.entered) { const instance = this.clone(); return instance.decode(buffer); } try { this.entered = true; this.reinitializeState(); this.setBuffer(buffer); const object = this.doDecodeSync(); if (this.hasRemaining(1)) { throw this.createExtraByteError(this.pos); } return object; } finally { this.entered = false; } } public *decodeMulti(buffer: ArrayLike<number> | ArrayBufferView | ArrayBufferLike): Generator<unknown, void, unknown> { if (this.entered) { const instance = this.clone(); yield* instance.decodeMulti(buffer); return; } try { this.entered = true; this.reinitializeState(); this.setBuffer(buffer); while (this.hasRemaining(1)) { yield this.doDecodeSync(); } } finally { this.entered = false; } } public async decodeAsync(stream: AsyncIterable<ArrayLike<number> | ArrayBufferView | ArrayBufferLike>): Promise<unknown> { if (this.entered) { const instance = this.clone(); return instance.decodeAsync(stream); } try { this.entered = true; let decoded = false; let object: unknown; for await (const buffer of stream) { if (decoded) { this.entered = false; throw this.createExtraByteError(this.totalPos); } this.appendBuffer(buffer); try { object = this.doDecodeSync(); decoded = true; } catch (e) { if (!(e instanceof RangeError)) { throw e; // rethrow } // fallthrough } this.totalPos += this.pos; } if (decoded) { if (this.hasRemaining(1)) { throw this.createExtraByteError(this.totalPos); } return object; } const { headByte, pos, totalPos } = this; throw new RangeError( `Insufficient data in parsing ${prettyByte(headByte)} at ${totalPos} (${pos} in the current buffer)`, ); } finally { this.entered = false; } } public decodeArrayStream( stream: AsyncIterable<ArrayLike<number> | ArrayBufferView | ArrayBufferLike>, ): AsyncGenerator<unknown, void, unknown> { return this.decodeMultiAsync(stream, true); } public decodeStream(stream: AsyncIterable<ArrayLike<number> | ArrayBufferView | ArrayBufferLike>): AsyncGenerator<unknown, void, unknown> { return this.decodeMultiAsync(stream, false); } private async *decodeMultiAsync(stream: AsyncIterable<ArrayLike<number> | ArrayBufferView | ArrayBufferLike>, isArray: boolean): AsyncGenerator<unknown, void, unknown> { if (this.entered) { const instance = this.clone(); yield* instance.decodeMultiAsync(stream, isArray); return; } try { this.entered = true; let isArrayHeaderRequired = isArray; let arrayItemsLeft = -1; for await (const buffer of stream) { if (isArray && arrayItemsLeft === 0) { throw this.createExtraByteError(this.totalPos); } this.appendBuffer(buffer); if (isArrayHeaderRequired) { arrayItemsLeft = this.readArraySize(); isArrayHeaderRequired = false; this.complete(); } try { while (true) { yield this.doDecodeSync(); if (--arrayItemsLeft === 0) { break; } } } catch (e) { if (!(e instanceof RangeError)) { throw e; // rethrow } // fallthrough } this.totalPos += this.pos; } } finally { this.entered = false; } } private doDecodeSync(): unknown { DECODE: while (true) { const headByte = this.readHeadByte(); let object: unknown; if (headByte >= 0xe0) { // negative fixint (111x xxxx) 0xe0 - 0xff object = headByte - 0x100; } else if (headByte < 0xc0) { if (headByte < 0x80) { // positive fixint (0xxx xxxx) 0x00 - 0x7f object = headByte; } else if (headByte < 0x90) { // fixmap (1000 xxxx) 0x80 - 0x8f const size = headByte - 0x80; if (size !== 0) { this.pushMapState(size); this.complete(); continue DECODE; } else { object = {}; } } else if (headByte < 0xa0) { // fixarray (1001 xxxx) 0x90 - 0x9f const size = headByte - 0x90; if (size !== 0) { this.pushArrayState(size); this.complete(); continue DECODE; } else { object = []; } } else { // fixstr (101x xxxx) 0xa0 - 0xbf const byteLength = headByte - 0xa0; object = this.decodeString(byteLength, 0); } } else if (headByte === 0xc0) { // nil object = null; } else if (headByte === 0xc2) { // false object = false; } else if (headByte === 0xc3) { // true object = true; } else if (headByte === 0xca) { // float 32 object = this.readF32(); } else if (headByte === 0xcb) { // float 64 object = this.readF64(); } else if (headByte === 0xcc) { // uint 8 object = this.readU8(); } else if (headByte === 0xcd) { // uint 16 object = this.readU16(); } else if (headByte === 0xce) { // uint 32 object = this.readU32(); } else if (headByte === 0xcf) { // uint 64 if (this.useBigInt64) { object = this.readU64AsBigInt(); } else { object = this.readU64(); } } else if (headByte === 0xd0) { // int 8 object = this.readI8(); } else if (headByte === 0xd1) { // int 16 object = this.readI16(); } else if (headByte === 0xd2) { // int 32 object = this.readI32(); } else if (headByte === 0xd3) { // int 64 if (this.useBigInt64) { object = this.readI64AsBigInt(); } else { object = this.readI64(); } } else if (headByte === 0xd9) { // str 8 const byteLength = this.lookU8(); object = this.decodeString(byteLength, 1); } else if (headByte === 0xda) { // str 16 const byteLength = this.lookU16(); object = this.decodeString(byteLength, 2); } else if (headByte === 0xdb) { // str 32 const byteLength = this.lookU32(); object = this.decodeString(byteLength, 4); } else if (headByte === 0xdc) { // array 16 const size = this.readU16(); if (size !== 0) { this.pushArrayState(size); this.complete(); continue DECODE; } else { object = []; } } else if (headByte === 0xdd) { // array 32 const size = this.readU32(); if (size !== 0) { this.pushArrayState(size); this.complete(); continue DECODE; } else { object = []; } } else if (headByte === 0xde) { // map 16 const size = this.readU16(); if (size !== 0) { this.pushMapState(size); this.complete(); continue DECODE; } else { object = {}; } } else if (headByte === 0xdf) { // map 32 const size = this.readU32(); if (size !== 0) { this.pushMapState(size); this.complete(); continue DECODE; } else { object = {}; } } else if (headByte === 0xc4) { // bin 8 const size = this.lookU8(); object = this.decodeBinary(size, 1); } else if (headByte === 0xc5) { // bin 16 const size = this.lookU16(); object = this.decodeBinary(size, 2); } else if (headByte === 0xc6) { // bin 32 const size = this.lookU32(); object = this.decodeBinary(size, 4); } else if (headByte === 0xd4) { // fixext 1 object = this.decodeExtension(1, 0); } else if (headByte === 0xd5) { // fixext 2 object = this.decodeExtension(2, 0); } else if (headByte === 0xd6) { // fixext 4 object = this.decodeExtension(4, 0); } else if (headByte === 0xd7) { // fixext 8 object = this.decodeExtension(8, 0); } else if (headByte === 0xd8) { // fixext 16 object = this.decodeExtension(16, 0); } else if (headByte === 0xc7) { // ext 8 const size = this.lookU8(); object = this.decodeExtension(size, 1); } else if (headByte === 0xc8) { // ext 16 const size = this.lookU16(); object = this.decodeExtension(size, 2); } else if (headByte === 0xc9) { // ext 32 const size = this.lookU32(); object = this.decodeExtension(size, 4); } else { throw new DecodeError(`Unrecognized type byte: ${prettyByte(headByte)}`); } this.complete(); const stack = this.stack; while (stack.length > 0) { // arrays and maps const state = stack.top()!; if (state.type === STATE_ARRAY) { state.array[state.position] = object; state.position++; if (state.position === state.size) { object = state.array; stack.release(state); } else { continue DECODE; } } else if (state.type === STATE_MAP_KEY) { if (object === "__proto__" || object === "constructor" || object === "prototype") { throw new DecodeError(`The key ${object} is not allowed`); } state.key = this.mapKeyConverter(object); state.type = STATE_MAP_VALUE; continue DECODE; } else { // it must be `state.type === State.MAP_VALUE` here state.map[state.key!] = object; state.readCount++; if (state.readCount === state.size) { object = state.map; stack.release(state); } else { state.key = null; state.type = STATE_MAP_KEY; continue DECODE; } } } return object; } } private readHeadByte(): number { if (this.headByte === HEAD_BYTE_REQUIRED) { this.headByte = this.readU8(); // console.log("headByte", prettyByte(this.headByte)); } return this.headByte; } private complete(): void { this.headByte = HEAD_BYTE_REQUIRED; } private readArraySize(): number { const headByte = this.readHeadByte(); switch (headByte) { case 0xdc: return this.readU16(); case 0xdd: return this.readU32(); default: { if (headByte < 0xa0) { return headByte - 0x90; } else { throw new DecodeError(`Unrecognized array type byte: ${prettyByte(headByte)}`); } } } } private pushMapState(size: number) { if (size > this.maxMapLength) { throw new DecodeError(`Max length exceeded: map length (${size}) > maxMapLengthLength (${this.maxMapLength})`); } this.stack.pushMapState(size); } private pushArrayState(size: number) { if (size > this.maxArrayLength) { throw new DecodeError(`Max length exceeded: array length (${size}) > maxArrayLength (${this.maxArrayLength})`); } this.stack.pushArrayState(size); } private decodeString(byteLength: number, headerOffset: number): string | Uint8Array { if (!this.rawStrings || this.stateIsMapKey()) { return this.decodeUtf8String(byteLength, headerOffset); } return this.decodeBinary(byteLength, headerOffset); } /** * @throws {@link RangeError} */ private decodeUtf8String(byteLength: number, headerOffset: number): string { if (byteLength > this.maxStrLength) { throw new DecodeError( `Max length exceeded: UTF-8 byte length (${byteLength}) > maxStrLength (${this.maxStrLength})`, ); } if (this.bytes.byteLength < this.pos + headerOffset + byteLength) { throw MORE_DATA; } const offset = this.pos + headerOffset; let object: string; if (this.stateIsMapKey() && this.keyDecoder?.canBeCached(byteLength)) { object = this.keyDecoder.decode(this.bytes, offset, byteLength); } else { object = utf8Decode(this.bytes, offset, byteLength); } this.pos += headerOffset + byteLength; return object; } private stateIsMapKey(): boolean { if (this.stack.length > 0) { const state = this.stack.top()!; return state.type === STATE_MAP_KEY; } return false; } /** * @throws {@link RangeError} */ private decodeBinary(byteLength: number, headOffset: number): Uint8Array { if (byteLength > this.maxBinLength) { throw new DecodeError(`Max length exceeded: bin length (${byteLength}) > maxBinLength (${this.maxBinLength})`); } if (!this.hasRemaining(byteLength + headOffset)) { throw MORE_DATA; } const offset = this.pos + headOffset; const object = this.bytes.subarray(offset, offset + byteLength); this.pos += headOffset + byteLength; return object; } private decodeExtension(size: number, headOffset: number): unknown { if (size > this.maxExtLength) { throw new DecodeError(`Max length exceeded: ext length (${size}) > maxExtLength (${this.maxExtLength})`); } const extType = this.view.getInt8(this.pos + headOffset); const data = this.decodeBinary(size, headOffset + 1 /* extType */); return this.extensionCodec.decode(data, extType, this.context); } private lookU8() { return this.view.getUint8(this.pos); } private lookU16() { return this.view.getUint16(this.pos); } private lookU32() { return this.view.getUint32(this.pos); } private readU8(): number { const value = this.view.getUint8(this.pos); this.pos++; return value; } private readI8(): number { const value = this.view.getInt8(this.pos); this.pos++; return value; } private readU16(): number { const value = this.view.getUint16(this.pos); this.pos += 2; return value; } private readI16(): number { const value = this.view.getInt16(this.pos); this.pos += 2; return value; } private readU32(): number { const value = this.view.getUint32(this.pos); this.pos += 4; return value; } private readI32(): number { const value = this.view.getInt32(this.pos); this.pos += 4; return value; } private readU64(): number { const value = getUint64(this.view, this.pos); this.pos += 8; return value; } private readI64(): number { const value = getInt64(this.view, this.pos); this.pos += 8; return value; } private readU64AsBigInt(): bigint { const value = this.view.getBigUint64(this.pos); this.pos += 8; return value; } private readI64AsBigInt(): bigint { const value = this.view.getBigInt64(this.pos); this.pos += 8; return value; } private readF32() { const value = this.view.getFloat32(this.pos); this.pos += 4; return value; } private readF64() { const value = this.view.getFloat64(this.pos); this.pos += 8; return value; } } |
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