706 lines
22 KiB
JavaScript
706 lines
22 KiB
JavaScript
(function (global, factory) {
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typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
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typeof define === 'function' && define.amd ? define(factory) :
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(global.jsonExt = factory());
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}(typeof globalThis != 'undefined' ? globalThis : typeof window != 'undefined' ? window : typeof global != 'undefined' ? global : typeof self != 'undefined' ? self : this, (function () {
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var exports = (() => {
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var __defProp = Object.defineProperty;
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var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
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var __getOwnPropNames = Object.getOwnPropertyNames;
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var __hasOwnProp = Object.prototype.hasOwnProperty;
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var __export = (target, all) => {
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for (var name in all)
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__defProp(target, name, { get: all[name], enumerable: true });
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};
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var __copyProps = (to, from, except, desc) => {
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if (from && typeof from === "object" || typeof from === "function") {
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for (let key of __getOwnPropNames(from))
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if (!__hasOwnProp.call(to, key) && key !== except)
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__defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
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}
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return to;
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};
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var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
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// src/index.js
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var src_exports = {};
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__export(src_exports, {
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createStringifyWebStream: () => createStringifyWebStream,
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parseChunked: () => parseChunked,
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parseFromWebStream: () => parseFromWebStream,
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stringifyChunked: () => stringifyChunked,
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stringifyInfo: () => stringifyInfo
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});
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// src/utils.js
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function isIterable(value) {
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return typeof value === "object" && value !== null && (typeof value[Symbol.iterator] === "function" || typeof value[Symbol.asyncIterator] === "function");
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}
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function replaceValue(holder, key, value, replacer) {
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if (value && typeof value.toJSON === "function") {
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value = value.toJSON();
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}
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if (replacer !== null) {
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value = replacer.call(holder, String(key), value);
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}
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switch (typeof value) {
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case "function":
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case "symbol":
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value = void 0;
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break;
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case "object":
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if (value !== null) {
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const cls = value.constructor;
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if (cls === String || cls === Number || cls === Boolean) {
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value = value.valueOf();
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}
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}
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break;
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}
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return value;
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}
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function normalizeReplacer(replacer) {
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if (typeof replacer === "function") {
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return replacer;
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}
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if (Array.isArray(replacer)) {
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const allowlist = new Set(
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replacer.map((item) => {
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const cls = item && item.constructor;
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return cls === String || cls === Number ? String(item) : null;
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}).filter((item) => typeof item === "string")
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);
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return [...allowlist];
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}
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return null;
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}
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function normalizeSpace(space) {
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if (typeof space === "number") {
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if (!Number.isFinite(space) || space < 1) {
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return false;
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}
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return " ".repeat(Math.min(space, 10));
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}
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if (typeof space === "string") {
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return space.slice(0, 10) || false;
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}
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return false;
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}
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function normalizeStringifyOptions(optionsOrReplacer, space) {
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if (optionsOrReplacer === null || Array.isArray(optionsOrReplacer) || typeof optionsOrReplacer !== "object") {
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optionsOrReplacer = {
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replacer: optionsOrReplacer,
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space
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};
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}
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let replacer = normalizeReplacer(optionsOrReplacer.replacer);
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let getKeys = Object.keys;
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if (Array.isArray(replacer)) {
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const allowlist = replacer;
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getKeys = () => allowlist;
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replacer = null;
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}
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return {
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...optionsOrReplacer,
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replacer,
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getKeys,
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space: normalizeSpace(optionsOrReplacer.space)
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};
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}
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// src/parse-chunked.js
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var STACK_OBJECT = 1;
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var STACK_ARRAY = 2;
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var decoder = new TextDecoder();
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function adjustPosition(error, parser) {
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if (error.name === "SyntaxError" && parser.jsonParseOffset) {
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error.message = error.message.replace(
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/at position (\d+)/,
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(_, pos) => "at position " + (Number(pos) + parser.jsonParseOffset)
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);
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}
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return error;
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}
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function append(array, elements) {
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const initialLength = array.length;
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array.length += elements.length;
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for (let i = 0; i < elements.length; i++) {
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array[initialLength + i] = elements[i];
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}
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}
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async function parseChunked(chunkEmitter) {
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const iterable = typeof chunkEmitter === "function" ? chunkEmitter() : chunkEmitter;
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if (isIterable(iterable)) {
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let parser = new ChunkParser();
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try {
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for await (const chunk of iterable) {
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if (typeof chunk !== "string" && !ArrayBuffer.isView(chunk)) {
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throw new TypeError("Invalid chunk: Expected string, TypedArray or Buffer");
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}
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parser.push(chunk);
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}
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return parser.finish();
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} catch (e) {
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throw adjustPosition(e, parser);
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}
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}
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throw new TypeError(
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"Invalid chunk emitter: Expected an Iterable, AsyncIterable, generator, async generator, or a function returning an Iterable or AsyncIterable"
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);
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}
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var ChunkParser = class {
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constructor() {
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this.value = void 0;
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this.valueStack = null;
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this.stack = new Array(100);
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this.lastFlushDepth = 0;
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this.flushDepth = 0;
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this.stateString = false;
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this.stateStringEscape = false;
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this.pendingByteSeq = null;
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this.pendingChunk = null;
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this.chunkOffset = 0;
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this.jsonParseOffset = 0;
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}
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parseAndAppend(fragment, wrap) {
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if (this.stack[this.lastFlushDepth - 1] === STACK_OBJECT) {
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if (wrap) {
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this.jsonParseOffset--;
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fragment = "{" + fragment + "}";
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}
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Object.assign(this.valueStack.value, JSON.parse(fragment));
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} else {
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if (wrap) {
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this.jsonParseOffset--;
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fragment = "[" + fragment + "]";
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}
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append(this.valueStack.value, JSON.parse(fragment));
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}
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}
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prepareAddition(fragment) {
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const { value } = this.valueStack;
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const expectComma = Array.isArray(value) ? value.length !== 0 : Object.keys(value).length !== 0;
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if (expectComma) {
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if (fragment[0] === ",") {
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this.jsonParseOffset++;
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return fragment.slice(1);
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}
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if (fragment[0] !== "}" && fragment[0] !== "]") {
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this.jsonParseOffset -= 3;
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return "[[]" + fragment;
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}
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}
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return fragment;
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}
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flush(chunk, start, end) {
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let fragment = chunk.slice(start, end);
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this.jsonParseOffset = this.chunkOffset + start;
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if (this.pendingChunk !== null) {
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fragment = this.pendingChunk + fragment;
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this.jsonParseOffset -= this.pendingChunk.length;
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this.pendingChunk = null;
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}
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if (this.flushDepth === this.lastFlushDepth) {
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if (this.flushDepth > 0) {
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this.parseAndAppend(this.prepareAddition(fragment), true);
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} else {
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this.value = JSON.parse(fragment);
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this.valueStack = {
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value: this.value,
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prev: null
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};
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}
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} else if (this.flushDepth > this.lastFlushDepth) {
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for (let i = this.flushDepth - 1; i >= this.lastFlushDepth; i--) {
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fragment += this.stack[i] === STACK_OBJECT ? "}" : "]";
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}
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if (this.lastFlushDepth === 0) {
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this.value = JSON.parse(fragment);
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this.valueStack = {
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value: this.value,
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prev: null
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};
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} else {
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this.parseAndAppend(this.prepareAddition(fragment), true);
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}
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for (let i = this.lastFlushDepth || 1; i < this.flushDepth; i++) {
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let value = this.valueStack.value;
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if (this.stack[i - 1] === STACK_OBJECT) {
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let key;
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for (key in value) ;
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value = value[key];
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} else {
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value = value[value.length - 1];
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}
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this.valueStack = {
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value,
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prev: this.valueStack
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};
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}
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} else {
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fragment = this.prepareAddition(fragment);
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for (let i = this.lastFlushDepth - 1; i >= this.flushDepth; i--) {
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this.jsonParseOffset--;
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fragment = (this.stack[i] === STACK_OBJECT ? "{" : "[") + fragment;
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}
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this.parseAndAppend(fragment, false);
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for (let i = this.lastFlushDepth - 1; i >= this.flushDepth; i--) {
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this.valueStack = this.valueStack.prev;
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}
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}
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this.lastFlushDepth = this.flushDepth;
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}
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push(chunk) {
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if (typeof chunk !== "string") {
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if (this.pendingByteSeq !== null) {
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const origRawChunk = chunk;
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chunk = new Uint8Array(this.pendingByteSeq.length + origRawChunk.length);
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chunk.set(this.pendingByteSeq);
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chunk.set(origRawChunk, this.pendingByteSeq.length);
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this.pendingByteSeq = null;
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}
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if (chunk[chunk.length - 1] > 127) {
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for (let seqLength = 0; seqLength < chunk.length; seqLength++) {
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const byte = chunk[chunk.length - 1 - seqLength];
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if (byte >> 6 === 3) {
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seqLength++;
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if (seqLength !== 4 && byte >> 3 === 30 || seqLength !== 3 && byte >> 4 === 14 || seqLength !== 2 && byte >> 5 === 6) {
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this.pendingByteSeq = chunk.slice(chunk.length - seqLength);
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chunk = chunk.slice(0, -seqLength);
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}
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break;
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}
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}
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}
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chunk = decoder.decode(chunk);
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}
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const chunkLength = chunk.length;
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let lastFlushPoint = 0;
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let flushPoint = 0;
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scan: for (let i = 0; i < chunkLength; i++) {
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if (this.stateString) {
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for (; i < chunkLength; i++) {
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if (this.stateStringEscape) {
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this.stateStringEscape = false;
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} else {
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switch (chunk.charCodeAt(i)) {
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case 34:
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this.stateString = false;
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continue scan;
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case 92:
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this.stateStringEscape = true;
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}
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}
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}
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break;
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}
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switch (chunk.charCodeAt(i)) {
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case 34:
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this.stateString = true;
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this.stateStringEscape = false;
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break;
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case 44:
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flushPoint = i;
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break;
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case 123:
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flushPoint = i + 1;
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this.stack[this.flushDepth++] = STACK_OBJECT;
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break;
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case 91:
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flushPoint = i + 1;
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this.stack[this.flushDepth++] = STACK_ARRAY;
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break;
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case 93:
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/* ] */
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case 125:
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flushPoint = i + 1;
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this.flushDepth--;
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if (this.flushDepth < this.lastFlushDepth) {
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this.flush(chunk, lastFlushPoint, flushPoint);
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lastFlushPoint = flushPoint;
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}
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break;
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case 9:
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/* \t */
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case 10:
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/* \n */
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case 13:
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/* \r */
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case 32:
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if (lastFlushPoint === i) {
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lastFlushPoint++;
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}
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if (flushPoint === i) {
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flushPoint++;
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}
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break;
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}
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}
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if (flushPoint > lastFlushPoint) {
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this.flush(chunk, lastFlushPoint, flushPoint);
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}
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if (flushPoint < chunkLength) {
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if (this.pendingChunk !== null) {
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this.pendingChunk += chunk;
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} else {
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this.pendingChunk = chunk.slice(flushPoint, chunkLength);
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}
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}
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this.chunkOffset += chunkLength;
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}
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finish() {
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if (this.pendingChunk !== null) {
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this.flush("", 0, 0);
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this.pendingChunk = null;
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}
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return this.value;
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}
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};
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// src/stringify-chunked.js
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function encodeString(value) {
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if (/[^\x20\x21\x23-\x5B\x5D-\uD799]/.test(value)) {
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return JSON.stringify(value);
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}
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return '"' + value + '"';
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}
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function* stringifyChunked(value, ...args) {
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const { replacer, getKeys, space, ...options } = normalizeStringifyOptions(...args);
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const highWaterMark = Number(options.highWaterMark) || 16384;
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const keyStrings = /* @__PURE__ */ new Map();
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const stack = [];
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const rootValue = { "": value };
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let prevState = null;
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let state = () => printEntry("", value);
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let stateValue = rootValue;
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let stateEmpty = true;
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let stateKeys = [""];
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let stateIndex = 0;
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let buffer = "";
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while (true) {
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state();
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if (buffer.length >= highWaterMark || prevState === null) {
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yield buffer;
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buffer = "";
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if (prevState === null) {
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break;
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}
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}
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}
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function printObject() {
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if (stateIndex === 0) {
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stateKeys = getKeys(stateValue);
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buffer += "{";
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}
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if (stateIndex === stateKeys.length) {
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buffer += space && !stateEmpty ? `
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${space.repeat(stack.length - 1)}}` : "}";
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popState();
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return;
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}
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const key = stateKeys[stateIndex++];
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printEntry(key, stateValue[key]);
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}
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function printArray() {
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if (stateIndex === 0) {
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buffer += "[";
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}
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if (stateIndex === stateValue.length) {
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buffer += space && !stateEmpty ? `
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${space.repeat(stack.length - 1)}]` : "]";
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popState();
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return;
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}
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printEntry(stateIndex, stateValue[stateIndex++]);
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}
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function printEntryPrelude(key) {
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if (stateEmpty) {
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stateEmpty = false;
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} else {
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buffer += ",";
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}
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if (space && prevState !== null) {
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buffer += `
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${space.repeat(stack.length)}`;
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}
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if (state === printObject) {
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let keyString = keyStrings.get(key);
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if (keyString === void 0) {
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keyStrings.set(key, keyString = encodeString(key) + (space ? ": " : ":"));
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}
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buffer += keyString;
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}
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}
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function printEntry(key, value2) {
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value2 = replaceValue(stateValue, key, value2, replacer);
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if (value2 === null || typeof value2 !== "object") {
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if (state !== printObject || value2 !== void 0) {
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printEntryPrelude(key);
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pushPrimitive(value2);
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}
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} else {
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if (stack.includes(value2)) {
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throw new TypeError("Converting circular structure to JSON");
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}
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printEntryPrelude(key);
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stack.push(value2);
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pushState();
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state = Array.isArray(value2) ? printArray : printObject;
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stateValue = value2;
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stateEmpty = true;
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stateIndex = 0;
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}
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}
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function pushPrimitive(value2) {
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switch (typeof value2) {
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case "string":
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buffer += encodeString(value2);
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break;
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case "number":
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buffer += Number.isFinite(value2) ? String(value2) : "null";
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break;
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case "boolean":
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buffer += value2 ? "true" : "false";
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break;
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case "undefined":
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case "object":
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buffer += "null";
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break;
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default:
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throw new TypeError(`Do not know how to serialize a ${value2.constructor?.name || typeof value2}`);
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}
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}
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function pushState() {
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prevState = {
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keys: stateKeys,
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index: stateIndex,
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prev: prevState
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};
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}
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function popState() {
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stack.pop();
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const value2 = stack.length > 0 ? stack[stack.length - 1] : rootValue;
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state = Array.isArray(value2) ? printArray : printObject;
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stateValue = value2;
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stateEmpty = false;
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stateKeys = prevState.keys;
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stateIndex = prevState.index;
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prevState = prevState.prev;
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}
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}
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// src/stringify-info.js
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var hasOwn = typeof Object.hasOwn === "function" ? Object.hasOwn : (object, key) => Object.hasOwnProperty.call(object, key);
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var escapableCharCodeSubstitution = {
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// JSON Single Character Escape Sequences
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8: "\\b",
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9: "\\t",
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10: "\\n",
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12: "\\f",
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13: "\\r",
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34: '\\"',
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92: "\\\\"
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};
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var charLength2048 = Uint8Array.from({ length: 2048 }, (_, code) => {
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if (hasOwn(escapableCharCodeSubstitution, code)) {
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return 2;
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}
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if (code < 32) {
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return 6;
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}
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return code < 128 ? 1 : 2;
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});
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function isLeadingSurrogate(code) {
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return code >= 55296 && code <= 56319;
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}
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function isTrailingSurrogate(code) {
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return code >= 56320 && code <= 57343;
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}
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function stringLength(str) {
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|
if (!/[^\x20\x21\x23-\x5B\x5D-\x7F]/.test(str)) {
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return str.length + 2;
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}
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let len = 0;
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let prevLeadingSurrogate = false;
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for (let i = 0; i < str.length; i++) {
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const code = str.charCodeAt(i);
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if (code < 2048) {
|
|
len += charLength2048[code];
|
|
} else if (isLeadingSurrogate(code)) {
|
|
len += 6;
|
|
prevLeadingSurrogate = true;
|
|
continue;
|
|
} else if (isTrailingSurrogate(code)) {
|
|
len = prevLeadingSurrogate ? len - 2 : len + 6;
|
|
} else {
|
|
len += 3;
|
|
}
|
|
prevLeadingSurrogate = false;
|
|
}
|
|
return len + 2;
|
|
}
|
|
function intLength(num) {
|
|
let len = 0;
|
|
if (num < 0) {
|
|
len = 1;
|
|
num = -num;
|
|
}
|
|
if (num >= 1e9) {
|
|
len += 9;
|
|
num = (num - num % 1e9) / 1e9;
|
|
}
|
|
if (num >= 1e4) {
|
|
if (num >= 1e6) {
|
|
return len + (num >= 1e8 ? 9 : num >= 1e7 ? 8 : 7);
|
|
}
|
|
return len + (num >= 1e5 ? 6 : 5);
|
|
}
|
|
return len + (num >= 100 ? num >= 1e3 ? 4 : 3 : num >= 10 ? 2 : 1);
|
|
}
|
|
function primitiveLength(value) {
|
|
switch (typeof value) {
|
|
case "string":
|
|
return stringLength(value);
|
|
case "number":
|
|
return Number.isFinite(value) ? Number.isInteger(value) ? intLength(value) : String(value).length : 4;
|
|
case "boolean":
|
|
return value ? 4 : 5;
|
|
case "undefined":
|
|
case "object":
|
|
return 4;
|
|
/* null */
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
function stringifyInfo(value, ...args) {
|
|
const { replacer, getKeys, ...options } = normalizeStringifyOptions(...args);
|
|
const continueOnCircular = Boolean(options.continueOnCircular);
|
|
const space = options.space?.length || 0;
|
|
const keysLength = /* @__PURE__ */ new Map();
|
|
const visited = /* @__PURE__ */ new Map();
|
|
const circular = /* @__PURE__ */ new Set();
|
|
const stack = [];
|
|
const root = { "": value };
|
|
let stop = false;
|
|
let bytes = 0;
|
|
let spaceBytes = 0;
|
|
let objects = 0;
|
|
walk(root, "", value);
|
|
if (bytes === 0) {
|
|
bytes += 9;
|
|
}
|
|
return {
|
|
bytes: isNaN(bytes) ? Infinity : bytes + spaceBytes,
|
|
spaceBytes: space > 0 && isNaN(bytes) ? Infinity : spaceBytes,
|
|
circular: [...circular]
|
|
};
|
|
function walk(holder, key, value2) {
|
|
if (stop) {
|
|
return;
|
|
}
|
|
value2 = replaceValue(holder, key, value2, replacer);
|
|
if (value2 === null || typeof value2 !== "object") {
|
|
if (value2 !== void 0 || Array.isArray(holder)) {
|
|
bytes += primitiveLength(value2);
|
|
}
|
|
} else {
|
|
if (stack.includes(value2)) {
|
|
circular.add(value2);
|
|
bytes += 4;
|
|
if (!continueOnCircular) {
|
|
stop = true;
|
|
}
|
|
return;
|
|
}
|
|
if (visited.has(value2)) {
|
|
bytes += visited.get(value2);
|
|
return;
|
|
}
|
|
objects++;
|
|
const prevObjects = objects;
|
|
const valueBytes = bytes;
|
|
let valueLength = 0;
|
|
stack.push(value2);
|
|
if (Array.isArray(value2)) {
|
|
valueLength = value2.length;
|
|
for (let i = 0; i < valueLength; i++) {
|
|
walk(value2, i, value2[i]);
|
|
}
|
|
} else {
|
|
let prevLength = bytes;
|
|
for (const key2 of getKeys(value2)) {
|
|
walk(value2, key2, value2[key2]);
|
|
if (prevLength !== bytes) {
|
|
let keyLen = keysLength.get(key2);
|
|
if (keyLen === void 0) {
|
|
keysLength.set(key2, keyLen = stringLength(key2) + 1);
|
|
}
|
|
bytes += keyLen;
|
|
valueLength++;
|
|
prevLength = bytes;
|
|
}
|
|
}
|
|
}
|
|
bytes += valueLength === 0 ? 2 : 1 + valueLength;
|
|
if (space > 0 && valueLength > 0) {
|
|
spaceBytes += // a space between ":" and a value for each object entry
|
|
(Array.isArray(value2) ? 0 : valueLength) + // the formula results from folding the following components:
|
|
// - for each key-value or element: ident + newline
|
|
// (1 + stack.length * space) * valueLength
|
|
// - ident (one space less) before "}" or "]" + newline
|
|
// (stack.length - 1) * space + 1
|
|
(1 + stack.length * space) * (valueLength + 1) - space;
|
|
}
|
|
stack.pop();
|
|
if (prevObjects !== objects) {
|
|
visited.set(value2, bytes - valueBytes);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// src/web-streams.js
|
|
function parseFromWebStream(stream) {
|
|
return parseChunked(isIterable(stream) ? stream : async function* () {
|
|
const reader = stream.getReader();
|
|
try {
|
|
while (true) {
|
|
const { value, done } = await reader.read();
|
|
if (done) {
|
|
break;
|
|
}
|
|
yield value;
|
|
}
|
|
} finally {
|
|
reader.releaseLock();
|
|
}
|
|
});
|
|
}
|
|
function createStringifyWebStream(value, replacer, space) {
|
|
if (typeof ReadableStream.from === "function") {
|
|
return ReadableStream.from(stringifyChunked(value, replacer, space));
|
|
}
|
|
return new ReadableStream({
|
|
start() {
|
|
this.generator = stringifyChunked(value, replacer, space);
|
|
},
|
|
pull(controller) {
|
|
const { value: value2, done } = this.generator.next();
|
|
if (done) {
|
|
controller.close();
|
|
} else {
|
|
controller.enqueue(value2);
|
|
}
|
|
},
|
|
cancel() {
|
|
this.generator = null;
|
|
}
|
|
});
|
|
}
|
|
return __toCommonJS(src_exports);
|
|
})();
|
|
|
|
return exports;
|
|
})));
|