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(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.jsonExt = factory());
}(this, (function () { 'use strict';
var name = "@discoveryjs/json-ext";
var version = "0.5.3";
var description = "A set of utilities that extend the use of JSON";
var keywords = [
"json",
"utils",
"stream",
"async",
"promise",
"stringify",
"info"
];
var author = "Roman Dvornov <rdvornov@gmail.com> (https://github.com/lahmatiy)";
var license = "MIT";
var repository = "discoveryjs/json-ext";
var main = "./src/index";
var browser = {
"./src/stringify-stream.js": "./src/stringify-stream-browser.js",
"./src/text-decoder.js": "./src/text-decoder-browser.js"
};
var scripts = {
test: "mocha --reporter progress",
lint: "eslint src test",
"lint-and-test": "npm run lint && npm test",
build: "rollup --config",
"test:all": "npm run test:src && npm run test:dist",
"test:src": "npm test",
"test:dist": "cross-env MODE=dist npm test && cross-env MODE=dist-min npm test",
"build-and-test": "npm run build && npm run test:dist",
coverage: "nyc npm test",
travis: "nyc npm run lint-and-test && npm run build-and-test && npm run coveralls",
coveralls: "nyc report --reporter=text-lcov | coveralls",
prepublishOnly: "npm run build"
};
var dependencies = {
};
var devDependencies = {
"@rollup/plugin-commonjs": "^15.1.0",
"@rollup/plugin-json": "^4.1.0",
"@rollup/plugin-node-resolve": "^9.0.0",
chalk: "^4.1.0",
coveralls: "^3.1.0",
"cross-env": "^7.0.3",
eslint: "^7.6.0",
mocha: "^8.1.1",
nyc: "^15.1.0",
rollup: "^2.28.2",
"rollup-plugin-terser": "^7.0.2"
};
var engines = {
node: ">=10.0.0"
};
var files = [
"dist",
"src"
];
var require$$0 = {
name: name,
version: version,
description: description,
keywords: keywords,
author: author,
license: license,
repository: repository,
main: main,
browser: browser,
scripts: scripts,
dependencies: dependencies,
devDependencies: devDependencies,
engines: engines,
files: files
};
const PrimitiveType = 1;
const ObjectType = 2;
const ArrayType = 3;
const PromiseType = 4;
const ReadableStringType = 5;
const ReadableObjectType = 6;
// https://tc39.es/ecma262/#table-json-single-character-escapes
const escapableCharCodeSubstitution$1 = { // JSON Single Character Escape Sequences
0x08: '\\b',
0x09: '\\t',
0x0a: '\\n',
0x0c: '\\f',
0x0d: '\\r',
0x22: '\\\"',
0x5c: '\\\\'
};
function isLeadingSurrogate$1(code) {
return code >= 0xD800 && code <= 0xDBFF;
}
function isTrailingSurrogate$1(code) {
return code >= 0xDC00 && code <= 0xDFFF;
}
function isReadableStream$1(value) {
return (
typeof value.pipe === 'function' &&
typeof value._read === 'function' &&
typeof value._readableState === 'object' && value._readableState !== null
);
}
function replaceValue$1(holder, key, value, replacer) {
if (value && typeof value.toJSON === 'function') {
value = value.toJSON();
}
if (replacer !== null) {
value = replacer.call(holder, String(key), value);
}
switch (typeof value) {
case 'function':
case 'symbol':
value = undefined;
break;
case 'object':
if (value !== null) {
const cls = value.constructor;
if (cls === String || cls === Number || cls === Boolean) {
value = value.valueOf();
}
}
break;
}
return value;
}
function getTypeNative$1(value) {
if (value === null || typeof value !== 'object') {
return PrimitiveType;
}
if (Array.isArray(value)) {
return ArrayType;
}
return ObjectType;
}
function getTypeAsync$1(value) {
if (value === null || typeof value !== 'object') {
return PrimitiveType;
}
if (typeof value.then === 'function') {
return PromiseType;
}
if (isReadableStream$1(value)) {
return value._readableState.objectMode ? ReadableObjectType : ReadableStringType;
}
if (Array.isArray(value)) {
return ArrayType;
}
return ObjectType;
}
function normalizeReplacer$1(replacer) {
if (typeof replacer === 'function') {
return replacer;
}
if (Array.isArray(replacer)) {
const allowlist = new Set(replacer
.map(item => {
const cls = item && item.constructor;
return cls === String || cls === Number ? String(item) : null;
})
.filter(item => typeof item === 'string')
);
return [...allowlist];
}
return null;
}
function normalizeSpace$1(space) {
if (typeof space === 'number') {
if (!Number.isFinite(space) || space < 1) {
return false;
}
return ' '.repeat(Math.min(space, 10));
}
if (typeof space === 'string') {
return space.slice(0, 10) || false;
}
return false;
}
var utils = {
escapableCharCodeSubstitution: escapableCharCodeSubstitution$1,
isLeadingSurrogate: isLeadingSurrogate$1,
isTrailingSurrogate: isTrailingSurrogate$1,
type: {
PRIMITIVE: PrimitiveType,
PROMISE: PromiseType,
ARRAY: ArrayType,
OBJECT: ObjectType,
STRING_STREAM: ReadableStringType,
OBJECT_STREAM: ReadableObjectType
},
isReadableStream: isReadableStream$1,
replaceValue: replaceValue$1,
getTypeNative: getTypeNative$1,
getTypeAsync: getTypeAsync$1,
normalizeReplacer: normalizeReplacer$1,
normalizeSpace: normalizeSpace$1
};
const {
normalizeReplacer,
normalizeSpace,
replaceValue,
getTypeNative,
getTypeAsync,
isLeadingSurrogate,
isTrailingSurrogate,
escapableCharCodeSubstitution,
type: {
PRIMITIVE,
OBJECT,
ARRAY,
PROMISE,
STRING_STREAM,
OBJECT_STREAM
}
} = utils;
const charLength2048 = Array.from({ length: 2048 }).map((_, code) => {
if (escapableCharCodeSubstitution.hasOwnProperty(code)) {
return 2; // \X
}
if (code < 0x20) {
return 6; // \uXXXX
}
return code < 128 ? 1 : 2; // UTF8 bytes
});
function stringLength(str) {
let len = 0;
let prevLeadingSurrogate = false;
for (let i = 0; i < str.length; i++) {
const code = str.charCodeAt(i);
if (code < 2048) {
len += charLength2048[code];
} else if (isLeadingSurrogate(code)) {
len += 6; // \uXXXX since no pair with trailing surrogate yet
prevLeadingSurrogate = true;
continue;
} else if (isTrailingSurrogate(code)) {
len = prevLeadingSurrogate
? len - 2 // surrogate pair (4 bytes), since we calculate prev leading surrogate as 6 bytes, substruct 2 bytes
: len + 6; // \uXXXX
} else {
len += 3; // code >= 2048 is 3 bytes length for UTF8
}
prevLeadingSurrogate = false;
}
return len + 2; // +2 for quotes
}
function primitiveLength(value) {
switch (typeof value) {
case 'string':
return stringLength(value);
case 'number':
return Number.isFinite(value) ? String(value).length : 4 /* null */;
case 'boolean':
return value ? 4 /* true */ : 5 /* false */;
case 'undefined':
case 'object':
return 4; /* null */
default:
return 0;
}
}
function spaceLength(space) {
space = normalizeSpace(space);
return typeof space === 'string' ? space.length : 0;
}
var stringifyInfo = function jsonStringifyInfo(value, replacer, space, options) {
function walk(holder, key, value) {
if (stop) {
return;
}
value = replaceValue(holder, key, value, replacer);
let type = getType(value);
// check for circular structure
if (type !== PRIMITIVE && stack.has(value)) {
circular.add(value);
length += 4; // treat as null
if (!options.continueOnCircular) {
stop = true;
}
return;
}
switch (type) {
case PRIMITIVE:
if (value !== undefined || Array.isArray(holder)) {
length += primitiveLength(value);
} else if (holder === root) {
length += 9; // FIXME: that's the length of undefined, should we normalize behaviour to convert it to null?
}
break;
case OBJECT: {
if (visited.has(value)) {
duplicate.add(value);
length += visited.get(value);
break;
}
const valueLength = length;
let entries = 0;
length += 2; // {}
stack.add(value);
for (const key in value) {
if (hasOwnProperty.call(value, key) && (allowlist === null || allowlist.has(key))) {
const prevLength = length;
walk(value, key, value[key]);
if (prevLength !== length) {
// value is printed
length += stringLength(key) + 1; // "key":
entries++;
}
}
}
if (entries > 1) {
length += entries - 1; // commas
}
stack.delete(value);
if (space > 0 && entries > 0) {
length += (1 + (stack.size + 1) * space + 1) * entries; // for each key-value: \n{space}
length += 1 + stack.size * space; // for }
}
visited.set(value, length - valueLength);
break;
}
case ARRAY: {
if (visited.has(value)) {
duplicate.add(value);
length += visited.get(value);
break;
}
const valueLength = length;
length += 2; // []
stack.add(value);
for (let i = 0; i < value.length; i++) {
walk(value, i, value[i]);
}
if (value.length > 1) {
length += value.length - 1; // commas
}
stack.delete(value);
if (space > 0 && value.length > 0) {
length += (1 + (stack.size + 1) * space) * value.length; // for each element: \n{space}
length += 1 + stack.size * space; // for ]
}
visited.set(value, length - valueLength);
break;
}
case PROMISE:
case STRING_STREAM:
async.add(value);
break;
case OBJECT_STREAM:
length += 2; // []
async.add(value);
break;
}
}
let allowlist = null;
replacer = normalizeReplacer(replacer);
if (Array.isArray(replacer)) {
allowlist = new Set(replacer);
replacer = null;
}
space = spaceLength(space);
options = options || {};
const visited = new Map();
const stack = new Set();
const duplicate = new Set();
const circular = new Set();
const async = new Set();
const getType = options.async ? getTypeAsync : getTypeNative;
const root = { '': value };
let stop = false;
let length = 0;
walk(root, '', value);
return {
minLength: isNaN(length) ? Infinity : length,
circular: [...circular],
duplicate: [...duplicate],
async: [...async]
};
};
var stringifyStreamBrowser = () => {
throw new Error('Method is not supported');
};
var textDecoderBrowser = TextDecoder;
const { isReadableStream } = utils;
const STACK_OBJECT = 1;
const STACK_ARRAY = 2;
const decoder = new textDecoderBrowser();
function isObject(value) {
return value !== null && typeof value === 'object';
}
function adjustPosition(error, parser) {
if (error.name === 'SyntaxError' && parser.jsonParseOffset) {
error.message = error.message.replace(/at position (\d+)/, (_, pos) =>
'at position ' + (Number(pos) + parser.jsonParseOffset)
);
}
return error;
}
function append(array, elements) {
// Note: Avoid to use array.push(...elements) since it may lead to
// "RangeError: Maximum call stack size exceeded" for a long arrays
const initialLength = array.length;
array.length += elements.length;
for (let i = 0; i < elements.length; i++) {
array[initialLength + i] = elements[i];
}
}
var parseChunked = function(chunkEmitter) {
let parser = new ChunkParser();
if (isObject(chunkEmitter) && isReadableStream(chunkEmitter)) {
return new Promise((resolve, reject) => {
chunkEmitter
.on('data', chunk => {
try {
parser.push(chunk);
} catch (e) {
reject(adjustPosition(e, parser));
parser = null;
}
})
.on('error', (e) => {
parser = null;
reject(e);
})
.on('end', () => {
try {
resolve(parser.finish());
} catch (e) {
reject(adjustPosition(e, parser));
} finally {
parser = null;
}
});
});
}
if (typeof chunkEmitter === 'function') {
const iterator = chunkEmitter();
if (isObject(iterator) && (Symbol.iterator in iterator || Symbol.asyncIterator in iterator)) {
return new Promise(async (resolve, reject) => {
try {
for await (const chunk of iterator) {
parser.push(chunk);
}
resolve(parser.finish());
} catch (e) {
reject(adjustPosition(e, parser));
} finally {
parser = null;
}
});
}
}
throw new Error(
'Chunk emitter should be readable stream, generator, ' +
'async generator or function returning an iterable object'
);
};
class ChunkParser {
constructor() {
this.value = undefined;
this.valueStack = null;
this.stack = new Array(100);
this.lastFlushDepth = 0;
this.flushDepth = 0;
this.stateString = false;
this.stateStringEscape = false;
this.pendingByteSeq = null;
this.pendingChunk = null;
this.chunkOffset = 0;
this.jsonParseOffset = 0;
}
parseAndAppend(fragment, wrap) {
// Append new entries or elements
if (this.stack[this.lastFlushDepth - 1] === STACK_OBJECT) {
if (wrap) {
this.jsonParseOffset--;
fragment = '{' + fragment + '}';
}
Object.assign(this.valueStack.value, JSON.parse(fragment));
} else {
if (wrap) {
this.jsonParseOffset--;
fragment = '[' + fragment + ']';
}
append(this.valueStack.value, JSON.parse(fragment));
}
}
prepareAddition(fragment) {
const { value } = this.valueStack;
const expectComma = Array.isArray(value)
? value.length !== 0
: Object.keys(value).length !== 0;
if (expectComma) {
// Skip a comma at the beginning of fragment, otherwise it would
// fail to parse
if (fragment[0] === ',') {
this.jsonParseOffset++;
return fragment.slice(1);
}
// When value (an object or array) is not empty and a fragment
// doesn't start with a comma, a single valid fragment starting
// is a closing bracket. If it's not, a prefix is adding to fail
// parsing. Otherwise, the sequence of chunks can be successfully
// parsed, although it should not, e.g. ["[{}", "{}]"]
if (fragment[0] !== '}' && fragment[0] !== ']') {
this.jsonParseOffset -= 3;
return '[[]' + fragment;
}
}
return fragment;
}
flush(chunk, start, end) {
let fragment = chunk.slice(start, end);
// Save position correction an error in JSON.parse() if any
this.jsonParseOffset = this.chunkOffset + start;
// Prepend pending chunk if any
if (this.pendingChunk !== null) {
fragment = this.pendingChunk + fragment;
this.jsonParseOffset -= this.pendingChunk.length;
this.pendingChunk = null;
}
if (this.flushDepth === this.lastFlushDepth) {
// Depth didn't changed, so it's a root value or entry/element set
if (this.flushDepth > 0) {
this.parseAndAppend(this.prepareAddition(fragment), true);
} else {
// That's an entire value on a top level
this.value = JSON.parse(fragment);
this.valueStack = {
value: this.value,
prev: null
};
}
} else if (this.flushDepth > this.lastFlushDepth) {
// Add missed closing brackets/parentheses
for (let i = this.flushDepth - 1; i >= this.lastFlushDepth; i--) {
fragment += this.stack[i] === STACK_OBJECT ? '}' : ']';
}
if (this.lastFlushDepth === 0) {
// That's a root value
this.value = JSON.parse(fragment);
this.valueStack = {
value: this.value,
prev: null
};
} else {
this.parseAndAppend(this.prepareAddition(fragment), true);
}
// Move down to the depths to the last object/array, which is current now
for (let i = this.lastFlushDepth || 1; i < this.flushDepth; i++) {
let value = this.valueStack.value;
if (this.stack[i - 1] === STACK_OBJECT) {
// find last entry
let key;
// eslint-disable-next-line curly
for (key in value);
value = value[key];
} else {
// last element
value = value[value.length - 1];
}
this.valueStack = {
value,
prev: this.valueStack
};
}
} else /* this.flushDepth < this.lastFlushDepth */ {
fragment = this.prepareAddition(fragment);
// Add missed opening brackets/parentheses
for (let i = this.lastFlushDepth - 1; i >= this.flushDepth; i--) {
this.jsonParseOffset--;
fragment = (this.stack[i] === STACK_OBJECT ? '{' : '[') + fragment;
}
this.parseAndAppend(fragment, false);
for (let i = this.lastFlushDepth - 1; i >= this.flushDepth; i--) {
this.valueStack = this.valueStack.prev;
}
}
this.lastFlushDepth = this.flushDepth;
}
push(chunk) {
if (typeof chunk !== 'string') {
// Suppose chunk is Buffer or Uint8Array
// Prepend uncompleted byte sequence if any
if (this.pendingByteSeq !== null) {
const origRawChunk = chunk;
chunk = new Uint8Array(this.pendingByteSeq.length + origRawChunk.length);
chunk.set(this.pendingByteSeq);
chunk.set(origRawChunk, this.pendingByteSeq.length);
this.pendingByteSeq = null;
}
// In case Buffer/Uint8Array, an input is encoded in UTF8
// Seek for parts of uncompleted UTF8 symbol on the ending
// This makes sense only if we expect more chunks and last char is not multi-bytes
if (chunk[chunk.length - 1] > 127) {
for (let seqLength = 0; seqLength < chunk.length; seqLength++) {
const byte = chunk[chunk.length - 1 - seqLength];
// 10xxxxxx - 2nd, 3rd or 4th byte
// 110xxxxx – first byte of 2-byte sequence
// 1110xxxx - first byte of 3-byte sequence
// 11110xxx - first byte of 4-byte sequence
if (byte >> 6 === 3) {
seqLength++;
// If the sequence is really incomplete, then preserve it
// for the future chunk and cut off it from the current chunk
if ((seqLength !== 4 && byte >> 3 === 0b11110) ||
(seqLength !== 3 && byte >> 4 === 0b1110) ||
(seqLength !== 2 && byte >> 5 === 0b110)) {
this.pendingByteSeq = chunk.slice(chunk.length - seqLength);
chunk = chunk.slice(0, -seqLength);
}
break;
}
}
}
// Convert chunk to a string, since single decode per chunk
// is much effective than decode multiple small substrings
chunk = decoder.decode(chunk);
}
const chunkLength = chunk.length;
let lastFlushPoint = 0;
let flushPoint = 0;
// Main scan loop
scan: for (let i = 0; i < chunkLength; i++) {
if (this.stateString) {
for (; i < chunkLength; i++) {
if (this.stateStringEscape) {
this.stateStringEscape = false;
} else {
switch (chunk.charCodeAt(i)) {
case 0x22: /* " */
this.stateString = false;
continue scan;
case 0x5C: /* \ */
this.stateStringEscape = true;
}
}
}
break;
}
switch (chunk.charCodeAt(i)) {
case 0x22: /* " */
this.stateString = true;
this.stateStringEscape = false;
break;
case 0x2C: /* , */
flushPoint = i;
break;
case 0x7B: /* { */
// Open an object
flushPoint = i + 1;
this.stack[this.flushDepth++] = STACK_OBJECT;
break;
case 0x5B: /* [ */
// Open an array
flushPoint = i + 1;
this.stack[this.flushDepth++] = STACK_ARRAY;
break;
case 0x5D: /* ] */
case 0x7D: /* } */
// Close an object or array
flushPoint = i + 1;
this.flushDepth--;
if (this.flushDepth < this.lastFlushDepth) {
this.flush(chunk, lastFlushPoint, flushPoint);
lastFlushPoint = flushPoint;
}
break;
case 0x09: /* \t */
case 0x0A: /* \n */
case 0x0D: /* \r */
case 0x20: /* space */
// Move points forward when they points on current position and it's a whitespace
if (lastFlushPoint === i) {
lastFlushPoint++;
}
if (flushPoint === i) {
flushPoint++;
}
break;
}
}
if (flushPoint > lastFlushPoint) {
this.flush(chunk, lastFlushPoint, flushPoint);
}
// Produce pendingChunk if something left
if (flushPoint < chunkLength) {
if (this.pendingChunk !== null) {
// When there is already a pending chunk then no flush happened,
// appending entire chunk to pending one
this.pendingChunk += chunk;
} else {
// Create a pending chunk, it will start with non-whitespace since
// flushPoint was moved forward away from whitespaces on scan
this.pendingChunk = chunk.slice(flushPoint, chunkLength);
}
}
this.chunkOffset += chunkLength;
}
finish() {
if (this.pendingChunk !== null) {
this.flush('', 0, 0);
this.pendingChunk = null;
}
return this.value;
}
}
var src = {
version: require$$0.version,
stringifyInfo: stringifyInfo,
stringifyStream: stringifyStreamBrowser,
parseChunked: parseChunked
};
return src;
})));