Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 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 | 17x 17x 17x 117x 117x 117x 117x 117x 117x 117x 117x 117x 197856x 197856x 197856x 117x 35540x 38620x 38353x 38353x 38353x 2183x 2103x 543x 482x 19364x 19293x 6849x 4220x 6600x 6276x 2293x 2248x 521x 332x 27286x 8858x 8180x 386x 57x 46x 61x 128x 2183x 1089x 182x 145x 133x 549x 80x 548x 498x 13x 2x 12x 12x 12x 12x 6x 5x 19369x 19312x 17x 2x 17x 17x 17x 17x 6x 5x 6848x 6803x 87x 16x 6600x 6543x 22x 25x 17x 13x 7x 521x 465x 455x 2293x 10x 10x 36x 36x 30x 30x 359x 359x 1858x 45x 1963x 1963x 1963x 1963x 1963x 1263x 1263x 86x 86x 86x 85x 85x 85x 14x 18x 53x 33x 26x 26x 6x 20x 6x 6x 6x 4x 4x 18x 15x 3x 12x 12x 18x 12x 11x 8x 2x 3x 3x 4x 4x 3x 1x 1x 14x 11x 1x 10x 18x 2x 1x 3x 223x 223x 223x 219x 219x 13x 13x 58x 116x 49x 74x 74x 73x 67x 93x 93x 27x 6x 10x 10x 5x 1x 34x 34x 33x 26x 23x 22x 7x 8x 7x 6x 4x 53x 83x 83x 27x 44x | import {CONST, ERROR, MAJOR} from './constants';
import {CborDecoderBase} from './CborDecoderBase';
import {JsonPackValue} from '../JsonPackValue';
import type {Path} from '@jsonjoy.com/json-pointer';
import type {IReader, IReaderResettable} from '@jsonjoy.com/buffers';
export class CborDecoder<
R extends IReader & IReaderResettable = IReader & IReaderResettable,
> extends CborDecoderBase<R> {
// -------------------------------------------------------------- Map reading
public readAsMap(): Map<unknown, unknown> {
const octet = this.reader.u8();
const major = octet >> 5;
const minor = octet & CONST.MINOR_MASK;
switch (major) {
case MAJOR.MAP:
return this.readMap(minor);
default:
throw ERROR.UNEXPECTED_MAJOR;
}
}
public readMap(minor: number): Map<unknown, unknown> {
const length = this.readMinorLen(minor);
if (length >= 0) return this.readMapRaw(length);
else Ereturn this.readMapIndef();
}
public readMapRaw(length: number): Map<unknown, unknown> {
const map: Map<unknown, unknown> = new Map();
for (let i = 0; i < length; i++) {
const key = this.readAny();
const value = this.readAny();
map.set(key, value);
}
return map;
}
public readMapIndef(): Map<unknown, unknown> {
const map: Map<unknown, unknown> = new Map();
while (this.reader.peak() !== CONST.END) {
const key = this.readAny();
if (this.reader.peak() === CONST.END) throw ERROR.UNEXPECTED_OBJ_BREAK;
const value = this.readAny();
map.set(key, value);
}
this.reader.x++;
return map;
}
// ----------------------------------------------------------- Value skipping
public skipN(n: number): void {
for (let i = 0; i < n; i++) this.skipAny();
}
public skipAny(): void {
this.skipAnyRaw(this.reader.u8());
}
public skipAnyRaw(octet: number): void {
const major = octet >> 5;
const minor = octet & CONST.MINOR_MASK;
switch (major) {
case MAJOR.UIN:
case MAJOR.NIN:
this.skipUNint(minor);
break;
case MAJOR.BIN:
this.skipBin(minor);
break;
case MAJOR.STR:
this.skipStr(minor);
break;
case MAJOR.ARR:
this.skipArr(minor);
break;
case MAJOR.MAP:
this.skipObj(minor);
break;
case MAJOR.TKN:
this.skipTkn(minor);
break;
case MAJOR.TAG:
this.skipTag(minor);
break;
}
}
public skipMinorLen(minor: number): number {
if (minor <= 23) return minor;
switch (minor) {
case 24:
return this.reader.u8();
case 25:
return this.reader.u16();
case 26:
return this.reader.u32();
case 27:
return Number(this.reader.u64());
case 31:
return -1;
default:
throw ERROR.UNEXPECTED_MINOR;
}
}
// --------------------------------------------------------- Integer skipping
public skipUNint(minor: number): void {
if (minor <= 23) return;
switch (minor) {
case 24:
return this.reader.skip(1);
case 25:
return this.reader.skip(2);
case 26:
return this.reader.skip(4);
case 27:
return this.reader.skip(8);
default:
throw ERROR.UNEXPECTED_MINOR;
}
}
// ---------------------------------------------------------- Binary skipping
public skipBin(minor: number): void {
const length = this.skipMinorLen(minor);
if (length >= 0) this.reader.skip(length);
else {
while (this.reader.peak() !== CONST.END) this.skipBinChunk();
this.reader.x++;
}
}
public skipBinChunk(): void {
const octet = this.reader.u8();
const major = octet >> 5;
const minor = octet & CONST.MINOR_MASK;
if (major !== MAJOR.BIN) throw ERROR.UNEXPECTED_BIN_CHUNK_MAJOR;
if (minor > 27) throw ERROR.UNEXPECTED_BIN_CHUNK_MINOR;
this.skipBin(minor);
}
// ---------------------------------------------------------- String skipping
public skipStr(minor: number): void {
const length = this.skipMinorLen(minor);
if (length >= 0) this.reader.skip(length);
else {
while (this.reader.peak() !== CONST.END) this.skipStrChunk();
this.reader.x++;
}
}
public skipStrChunk(): void {
const octet = this.reader.u8();
const major = octet >> 5;
const minor = octet & CONST.MINOR_MASK;
if (major !== MAJOR.STR) throw ERROR.UNEXPECTED_STR_CHUNK_MAJOR;
if (minor > 27) throw ERROR.UNEXPECTED_STR_CHUNK_MINOR;
this.skipStr(minor);
}
// ----------------------------------------------------------- Array skipping
public skipArr(minor: number): void {
const length = this.skipMinorLen(minor);
if (length >= 0) this.skipN(length);
else {
while (this.reader.peak() !== CONST.END) this.skipAny();
this.reader.x++;
}
}
// ---------------------------------------------------------- Object skipping
public skipObj(minor: number): void {
const length = this.readMinorLen(minor);
if (length >= 0) return this.skipN(length * 2);
else {
while (this.reader.peak() !== CONST.END) {
this.skipAny();
if (this.reader.peak() === CONST.END) throw ERROR.UNEXPECTED_OBJ_BREAK;
this.skipAny();
}
this.reader.x++;
}
}
// ------------------------------------------------------------- Tag skipping
public skipTag(minor: number): void {
const length = this.skipMinorLen(minor);
if (length < 0) throw ERROR.UNEXPECTED_MINOR;
this.skipAny();
}
// ----------------------------------------------------------- Token skipping
public skipTkn(minor: number): void {
switch (minor) {
case 0xf8 & CONST.MINOR_MASK:
this.reader.skip(1);
return;
case 0xf9 & CONST.MINOR_MASK:
this.reader.skip(2);
return;
case 0xfa & CONST.MINOR_MASK:
this.reader.skip(4);
return;
case 0xfb & CONST.MINOR_MASK:
this.reader.skip(8);
return;
}
if (minor <= 23) return;
throw ERROR.UNEXPECTED_MINOR;
}
// --------------------------------------------------------------- Validation
/**
* Throws if at given offset in a buffer there is an invalid CBOR value, or
* if the value does not span the exact length specified in `size`. I.e.
* throws if:
*
* - The value is not a valid CBOR value.
* - The value is shorter than `size`.
* - The value is longer than `size`.
*
* @param value Buffer in which to validate CBOR value.
* @param offset Offset at which the value starts.
* @param size Expected size of the value.
*/
public validate(value: Uint8Array, offset: number = 0, size: number = value.length): void {
const reader = this.reader;
reader.reset(value);
reader.x = offset;
const start = offset;
this.skipAny();
const end = reader.x;
if (end - start !== size) throw ERROR.INVALID_SIZE;
}
// -------------------------------------------- One level reading - any value
public decodeLevel(value: Uint8Array): unknown {
this.reader.reset(value);
return this.readLevel();
}
/**
* Decodes only one level of objects and arrays. Other values are decoded
* completely.
*
* @returns One level of decoded CBOR value.
*/
public readLevel(): unknown {
const octet = this.reader.u8();
const major = octet >> 5;
const minor = octet & CONST.MINOR_MASK;
switch (major) {
case MAJOR.ARR:
return this.readArrLevel(minor);
case MAJOR.MAP:
return this.readObjLevel(minor);
default:
return super.readAnyRaw(octet);
}
}
/**
* Decodes primitive values, returns container values as `JsonPackValue`.
*
* @returns A primitive value, or CBOR container value as a blob.
*/
public readPrimitiveOrVal(): unknown | JsonPackValue {
const octet = this.reader.peak();
const major = octet >> 5;
switch (major) {
case MAJOR.ARR:
case MAJOR.MAP:
return this.readAsValue();
default:
return this.readAny();
}
}
public readAsValue(): JsonPackValue {
const reader = this.reader;
const start = reader.x;
this.skipAny();
const end = reader.x;
return new JsonPackValue(reader.uint8.subarray(start, end));
}
// ----------------------------------------------- One level reading - object
public readObjLevel(minor: number): Record<string, unknown> {
const length = this.readMinorLen(minor);
if (length >= 0) return this.readObjRawLevel(length);
else return this.readObjIndefLevel();
}
public readObjRawLevel(length: number): Record<string, unknown> {
const obj: Record<string, unknown> = {};
for (let i = 0; i < length; i++) {
const key = this.key();
if (key === '__proto__') throw ERROR.UNEXPECTED_OBJ_KEY;
const value = this.readPrimitiveOrVal();
obj[key] = value;
}
return obj;
}
public readObjIndefLevel(): Record<string, unknown> {
const obj: Record<string, unknown> = {};
while (this.reader.peak() !== CONST.END) {
const key = this.key();
if (key === '__proto__') throw ERROR.UNEXPECTED_OBJ_KEY;
if (this.reader.peak() === CONST.END) throw ERROR.UNEXPECTED_OBJ_BREAK;
const value = this.readPrimitiveOrVal();
obj[key] = value;
}
this.reader.x++;
return obj;
}
// ------------------------------------------------ One level reading - array
public readArrLevel(minor: number): unknown[] {
const length = this.readMinorLen(minor);
if (length >= 0) return this.readArrRawLevel(length);
return this.readArrIndefLevel();
}
public readArrRawLevel(length: number): unknown[] {
const arr: unknown[] = [];
for (let i = 0; i < length; i++) arr.push(this.readPrimitiveOrVal());
return arr;
}
public readArrIndefLevel(): unknown[] {
const arr: unknown[] = [];
while (this.reader.peak() !== CONST.END) arr.push(this.readPrimitiveOrVal());
this.reader.x++;
return arr;
}
// ---------------------------------------------------------- Shallow reading
public readHdr(expectedMajor: number): number {
const octet = this.reader.u8();
const major = octet >> 5;
if (major !== expectedMajor) throw ERROR.UNEXPECTED_MAJOR;
const minor = octet & CONST.MINOR_MASK;
if (minor < 24) return minor;
switch (minor) {
case 24:
return this.reader.u8();
case 25:
return this.reader.u16();
case 26:
return this.reader.u32();
case 27:
return Number(this.reader.u64());
case 31:
return -1;
}
throw ERROR.UNEXPECTED_MINOR;
}
public readStrHdr(): number {
return this.readHdr(MAJOR.STR);
}
public readObjHdr(): number {
return this.readHdr(MAJOR.MAP);
}
public readArrHdr(): number {
return this.readHdr(MAJOR.ARR);
}
public findKey(key: string): this {
const reader = this.reader;
const size = this.readObjHdr();
if (size >= 0) {
for (let i = 0; i < size; i++) {
const k = this.key();
if (k === key) return this;
this.skipAny();
}
} else {
while (reader.peak() !== CONST.END) {
const k = this.key();
if (k === key) return this;
this.skipAny();
}
}
throw ERROR.KEY_NOT_FOUND;
}
public findIndex(index: number): this {
const reader = this.reader;
const size = this.readArrHdr();
if (size >= 0) {
if (index >= size) throw ERROR.INDEX_OUT_OF_BOUNDS;
for (let i = 0; i < index; i++) this.skipAny();
return this;
}
for (let i = 0; i < index; i++) {
if (reader.peak() === CONST.END) throw ERROR.INDEX_OUT_OF_BOUNDS;
this.skipAny();
}
if (reader.peak() === CONST.END) throw ERROR.INDEX_OUT_OF_BOUNDS;
return this;
}
public find(path: Path): this {
for (let i = 0; i < path.length; i++) {
const segment = path[i];
if (typeof segment === 'string') this.findKey(segment);
else this.findIndex(segment);
}
return this;
}
}
|