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The MIT License (MIT)
Copyright (c) 2013 Andrey Sidorov
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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# json-bigint
[![Build Status](https://secure.travis-ci.org/sidorares/json-bigint.png)](http://travis-ci.org/sidorares/json-bigint)
[![NPM](https://nodei.co/npm/json-bigint.png?downloads=true&stars=true)](https://nodei.co/npm/json-bigint/)
JSON.parse/stringify with bigints support. Based on Douglas Crockford [JSON.js](https://github.com/douglascrockford/JSON-js) package and [bignumber.js](https://github.com/MikeMcl/bignumber.js) library.
Native `Bigint` was added to JS recently, so we added an option to leverage it instead of `bignumber.js`. However, the parsing with native `BigInt` is kept an option for backward compability.
While most JSON parsers assume numeric values have same precision restrictions as IEEE 754 double, JSON specification _does not_ say anything about number precision. Any floating point number in decimal (optionally scientific) notation is valid JSON value. It's a good idea to serialize values which might fall out of IEEE 754 integer precision as strings in your JSON api, but `{ "value" : 9223372036854775807}`, for example, is still a valid RFC4627 JSON string, and in most JS runtimes the result of `JSON.parse` is this object: `{ value: 9223372036854776000 }`
==========
example:
```js
var JSONbig = require('json-bigint');
var json = '{ "value" : 9223372036854775807, "v2": 123 }';
console.log('Input:', json);
console.log('');
console.log('node.js built-in JSON:');
var r = JSON.parse(json);
console.log('JSON.parse(input).value : ', r.value.toString());
console.log('JSON.stringify(JSON.parse(input)):', JSON.stringify(r));
console.log('\n\nbig number JSON:');
var r1 = JSONbig.parse(json);
console.log('JSONbig.parse(input).value : ', r1.value.toString());
console.log('JSONbig.stringify(JSONbig.parse(input)):', JSONbig.stringify(r1));
```
Output:
```
Input: { "value" : 9223372036854775807, "v2": 123 }
node.js built-in JSON:
JSON.parse(input).value : 9223372036854776000
JSON.stringify(JSON.parse(input)): {"value":9223372036854776000,"v2":123}
big number JSON:
JSONbig.parse(input).value : 9223372036854775807
JSONbig.stringify(JSONbig.parse(input)): {"value":9223372036854775807,"v2":123}
```
### Options
The behaviour of the parser is somewhat configurable through 'options'
#### options.strict, boolean, default false
Specifies the parsing should be "strict" towards reporting duplicate-keys in the parsed string.
The default follows what is allowed in standard json and resembles the behavior of JSON.parse, but overwrites any previous values with the last one assigned to the duplicate-key.
Setting options.strict = true will fail-fast on such duplicate-key occurances and thus warn you upfront of possible lost information.
example:
```js
var JSONbig = require('json-bigint');
var JSONstrict = require('json-bigint')({ strict: true });
var dupkeys = '{ "dupkey": "value 1", "dupkey": "value 2"}';
console.log('\n\nDuplicate Key test with both lenient and strict JSON parsing');
console.log('Input:', dupkeys);
var works = JSONbig.parse(dupkeys);
console.log('JSON.parse(dupkeys).dupkey: %s', works.dupkey);
var fails = 'will stay like this';
try {
fails = JSONstrict.parse(dupkeys);
console.log('ERROR!! Should never get here');
} catch (e) {
console.log(
'Succesfully catched expected exception on duplicate keys: %j',
e
);
}
```
Output
```
Duplicate Key test with big number JSON
Input: { "dupkey": "value 1", "dupkey": "value 2"}
JSON.parse(dupkeys).dupkey: value 2
Succesfully catched expected exception on duplicate keys: {"name":"SyntaxError","message":"Duplicate key \"dupkey\"","at":33,"text":"{ \"dupkey\": \"value 1\", \"dupkey\": \"value 2\"}"}
```
#### options.storeAsString, boolean, default false
Specifies if BigInts should be stored in the object as a string, rather than the default BigNumber.
Note that this is a dangerous behavior as it breaks the default functionality of being able to convert back-and-forth without data type changes (as this will convert all BigInts to be-and-stay strings).
example:
```js
var JSONbig = require('json-bigint');
var JSONbigString = require('json-bigint')({ storeAsString: true });
var key = '{ "key": 1234567890123456789 }';
console.log('\n\nStoring the BigInt as a string, instead of a BigNumber');
console.log('Input:', key);
var withInt = JSONbig.parse(key);
var withString = JSONbigString.parse(key);
console.log(
'Default type: %s, With option type: %s',
typeof withInt.key,
typeof withString.key
);
```
Output
```
Storing the BigInt as a string, instead of a BigNumber
Input: { "key": 1234567890123456789 }
Default type: object, With option type: string
```
#### options.useNativeBigInt, boolean, default false
Specifies if parser uses native BigInt instead of bignumber.js
example:
```js
var JSONbig = require('json-bigint');
var JSONbigNative = require('json-bigint')({ useNativeBigInt: true });
var key = '{ "key": 993143214321423154315154321 }';
console.log(`\n\nStoring the Number as native BigInt, instead of a BigNumber`);
console.log('Input:', key);
var normal = JSONbig.parse(key);
var nativeBigInt = JSONbigNative.parse(key);
console.log(
'Default type: %s, With option type: %s',
typeof normal.key,
typeof nativeBigInt.key
);
```
Output
```
Storing the Number as native BigInt, instead of a BigNumber
Input: { "key": 993143214321423154315154321 }
Default type: object, With option type: bigint
```
#### options.alwaysParseAsBig, boolean, default false
Specifies if all numbers should be stored as BigNumber.
Note that this is a dangerous behavior as it breaks the default functionality of being able to convert back-and-forth without data type changes (as this will convert all Number to be-and-stay BigNumber)
example:
```js
var JSONbig = require('json-bigint');
var JSONbigAlways = require('json-bigint')({ alwaysParseAsBig: true });
var key = '{ "key": 123 }'; // there is no need for BigNumber by default, but we're forcing it
console.log(`\n\nStoring the Number as a BigNumber, instead of a Number`);
console.log('Input:', key);
var normal = JSONbig.parse(key);
var always = JSONbigAlways.parse(key);
console.log(
'Default type: %s, With option type: %s',
typeof normal.key,
typeof always.key
);
```
Output
```
Storing the Number as a BigNumber, instead of a Number
Input: { "key": 123 }
Default type: number, With option type: object
```
If you want to force all numbers to be parsed as native `BigInt`
(you probably do! Otherwise any calulations become a real headache):
```js
var JSONbig = require('json-bigint')({
alwaysParseAsBig: true,
useNativeBigInt: true,
});
```
#### options.protoAction, boolean, default: "error". Possible values: "error", "ignore", "preserve"
#### options.constructorAction, boolean, default: "error". Possible values: "error", "ignore", "preserve"
Controls how `__proto__` and `constructor` properties are treated. If set to "error" they are not allowed and
parse() call will throw an error. If set to "ignore" the prroperty and it;s value is skipped from parsing and object building.
If set to "preserve" the `__proto__` property is set. One should be extra careful and make sure any other library consuming generated data
is not vulnerable to prototype poisoning attacks.
example:
```js
var JSONbigAlways = require('json-bigint')({ protoAction: 'ignore' });
const user = JSONbig.parse('{ "__proto__": { "admin": true }, "id": 12345 }');
// => result is { id: 12345 }
```
### Links:
- [RFC4627: The application/json Media Type for JavaScript Object Notation (JSON)](http://www.ietf.org/rfc/rfc4627.txt)
- [Re: \[Json\] Limitations on number size?](http://www.ietf.org/mail-archive/web/json/current/msg00297.html)
- [Is there any proper way to parse JSON with large numbers? (long, bigint, int64)](http://stackoverflow.com/questions/18755125/node-js-is-there-any-proper-way-to-parse-json-with-large-numbers-long-bigint)
- [What is JavaScript's Max Int? What's the highest Integer value a Number can go to without losing precision?](http://stackoverflow.com/questions/307179/what-is-javascripts-max-int-whats-the-highest-integer-value-a-number-can-go-t)
- [Large numbers erroneously rounded in Javascript](http://stackoverflow.com/questions/1379934/large-numbers-erroneously-rounded-in-javascript)
### Note on native BigInt support
#### Stringifying
Full support out-of-the-box, stringifies BigInts as pure numbers (no quotes, no `n`)
#### Limitations
- Roundtrip operations
`s === JSONbig.stringify(JSONbig.parse(s))` but
`o !== JSONbig.parse(JSONbig.stringify(o))`
when `o` has a value with something like `123n`.
`JSONbig` stringify `123n` as `123`, which becomes `number` (aka `123` not `123n`) by default when being reparsed.
There is currently no consistent way to deal with this issue, so we decided to leave it, handling this specific case is then up to users.

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var json_stringify = require('./lib/stringify.js').stringify;
var json_parse = require('./lib/parse.js');
module.exports = function(options) {
return {
parse: json_parse(options),
stringify: json_stringify
}
};
//create the default method members with no options applied for backwards compatibility
module.exports.parse = json_parse();
module.exports.stringify = json_stringify;

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var BigNumber = null;
// regexpxs extracted from
// (c) BSD-3-Clause
// https://github.com/fastify/secure-json-parse/graphs/contributors and https://github.com/hapijs/bourne/graphs/contributors
const suspectProtoRx = /(?:_|\\u005[Ff])(?:_|\\u005[Ff])(?:p|\\u0070)(?:r|\\u0072)(?:o|\\u006[Ff])(?:t|\\u0074)(?:o|\\u006[Ff])(?:_|\\u005[Ff])(?:_|\\u005[Ff])/;
const suspectConstructorRx = /(?:c|\\u0063)(?:o|\\u006[Ff])(?:n|\\u006[Ee])(?:s|\\u0073)(?:t|\\u0074)(?:r|\\u0072)(?:u|\\u0075)(?:c|\\u0063)(?:t|\\u0074)(?:o|\\u006[Ff])(?:r|\\u0072)/;
/*
json_parse.js
2012-06-20
Public Domain.
NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
This file creates a json_parse function.
During create you can (optionally) specify some behavioural switches
require('json-bigint')(options)
The optional options parameter holds switches that drive certain
aspects of the parsing process:
* options.strict = true will warn about duplicate-key usage in the json.
The default (strict = false) will silently ignore those and overwrite
values for keys that are in duplicate use.
The resulting function follows this signature:
json_parse(text, reviver)
This method parses a JSON text to produce an object or array.
It can throw a SyntaxError exception.
The optional reviver parameter is a function that can filter and
transform the results. It receives each of the keys and values,
and its return value is used instead of the original value.
If it returns what it received, then the structure is not modified.
If it returns undefined then the member is deleted.
Example:
// Parse the text. Values that look like ISO date strings will
// be converted to Date objects.
myData = json_parse(text, function (key, value) {
var a;
if (typeof value === 'string') {
a =
/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
if (a) {
return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
+a[5], +a[6]));
}
}
return value;
});
This is a reference implementation. You are free to copy, modify, or
redistribute.
This code should be minified before deployment.
See http://javascript.crockford.com/jsmin.html
USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
NOT CONTROL.
*/
/*members "", "\"", "\/", "\\", at, b, call, charAt, f, fromCharCode,
hasOwnProperty, message, n, name, prototype, push, r, t, text
*/
var json_parse = function (options) {
'use strict';
// This is a function that can parse a JSON text, producing a JavaScript
// data structure. It is a simple, recursive descent parser. It does not use
// eval or regular expressions, so it can be used as a model for implementing
// a JSON parser in other languages.
// We are defining the function inside of another function to avoid creating
// global variables.
// Default options one can override by passing options to the parse()
var _options = {
strict: false, // not being strict means do not generate syntax errors for "duplicate key"
storeAsString: false, // toggles whether the values should be stored as BigNumber (default) or a string
alwaysParseAsBig: false, // toggles whether all numbers should be Big
useNativeBigInt: false, // toggles whether to use native BigInt instead of bignumber.js
protoAction: 'error',
constructorAction: 'error',
};
// If there are options, then use them to override the default _options
if (options !== undefined && options !== null) {
if (options.strict === true) {
_options.strict = true;
}
if (options.storeAsString === true) {
_options.storeAsString = true;
}
_options.alwaysParseAsBig =
options.alwaysParseAsBig === true ? options.alwaysParseAsBig : false;
_options.useNativeBigInt =
options.useNativeBigInt === true ? options.useNativeBigInt : false;
if (typeof options.constructorAction !== 'undefined') {
if (
options.constructorAction === 'error' ||
options.constructorAction === 'ignore' ||
options.constructorAction === 'preserve'
) {
_options.constructorAction = options.constructorAction;
} else {
throw new Error(
`Incorrect value for constructorAction option, must be "error", "ignore" or undefined but passed ${options.constructorAction}`
);
}
}
if (typeof options.protoAction !== 'undefined') {
if (
options.protoAction === 'error' ||
options.protoAction === 'ignore' ||
options.protoAction === 'preserve'
) {
_options.protoAction = options.protoAction;
} else {
throw new Error(
`Incorrect value for protoAction option, must be "error", "ignore" or undefined but passed ${options.protoAction}`
);
}
}
}
var at, // The index of the current character
ch, // The current character
escapee = {
'"': '"',
'\\': '\\',
'/': '/',
b: '\b',
f: '\f',
n: '\n',
r: '\r',
t: '\t',
},
text,
error = function (m) {
// Call error when something is wrong.
throw {
name: 'SyntaxError',
message: m,
at: at,
text: text,
};
},
next = function (c) {
// If a c parameter is provided, verify that it matches the current character.
if (c && c !== ch) {
error("Expected '" + c + "' instead of '" + ch + "'");
}
// Get the next character. When there are no more characters,
// return the empty string.
ch = text.charAt(at);
at += 1;
return ch;
},
number = function () {
// Parse a number value.
var number,
string = '';
if (ch === '-') {
string = '-';
next('-');
}
while (ch >= '0' && ch <= '9') {
string += ch;
next();
}
if (ch === '.') {
string += '.';
while (next() && ch >= '0' && ch <= '9') {
string += ch;
}
}
if (ch === 'e' || ch === 'E') {
string += ch;
next();
if (ch === '-' || ch === '+') {
string += ch;
next();
}
while (ch >= '0' && ch <= '9') {
string += ch;
next();
}
}
number = +string;
if (!isFinite(number)) {
error('Bad number');
} else {
if (BigNumber == null) BigNumber = require('bignumber.js');
//if (number > 9007199254740992 || number < -9007199254740992)
// Bignumber has stricter check: everything with length > 15 digits disallowed
if (string.length > 15)
return _options.storeAsString
? string
: _options.useNativeBigInt
? BigInt(string)
: new BigNumber(string);
else
return !_options.alwaysParseAsBig
? number
: _options.useNativeBigInt
? BigInt(number)
: new BigNumber(number);
}
},
string = function () {
// Parse a string value.
var hex,
i,
string = '',
uffff;
// When parsing for string values, we must look for " and \ characters.
if (ch === '"') {
var startAt = at;
while (next()) {
if (ch === '"') {
if (at - 1 > startAt) string += text.substring(startAt, at - 1);
next();
return string;
}
if (ch === '\\') {
if (at - 1 > startAt) string += text.substring(startAt, at - 1);
next();
if (ch === 'u') {
uffff = 0;
for (i = 0; i < 4; i += 1) {
hex = parseInt(next(), 16);
if (!isFinite(hex)) {
break;
}
uffff = uffff * 16 + hex;
}
string += String.fromCharCode(uffff);
} else if (typeof escapee[ch] === 'string') {
string += escapee[ch];
} else {
break;
}
startAt = at;
}
}
}
error('Bad string');
},
white = function () {
// Skip whitespace.
while (ch && ch <= ' ') {
next();
}
},
word = function () {
// true, false, or null.
switch (ch) {
case 't':
next('t');
next('r');
next('u');
next('e');
return true;
case 'f':
next('f');
next('a');
next('l');
next('s');
next('e');
return false;
case 'n':
next('n');
next('u');
next('l');
next('l');
return null;
}
error("Unexpected '" + ch + "'");
},
value, // Place holder for the value function.
array = function () {
// Parse an array value.
var array = [];
if (ch === '[') {
next('[');
white();
if (ch === ']') {
next(']');
return array; // empty array
}
while (ch) {
array.push(value());
white();
if (ch === ']') {
next(']');
return array;
}
next(',');
white();
}
}
error('Bad array');
},
object = function () {
// Parse an object value.
var key,
object = Object.create(null);
if (ch === '{') {
next('{');
white();
if (ch === '}') {
next('}');
return object; // empty object
}
while (ch) {
key = string();
white();
next(':');
if (
_options.strict === true &&
Object.hasOwnProperty.call(object, key)
) {
error('Duplicate key "' + key + '"');
}
if (suspectProtoRx.test(key) === true) {
if (_options.protoAction === 'error') {
error('Object contains forbidden prototype property');
} else if (_options.protoAction === 'ignore') {
value();
} else {
object[key] = value();
}
} else if (suspectConstructorRx.test(key) === true) {
if (_options.constructorAction === 'error') {
error('Object contains forbidden constructor property');
} else if (_options.constructorAction === 'ignore') {
value();
} else {
object[key] = value();
}
} else {
object[key] = value();
}
white();
if (ch === '}') {
next('}');
return object;
}
next(',');
white();
}
}
error('Bad object');
};
value = function () {
// Parse a JSON value. It could be an object, an array, a string, a number,
// or a word.
white();
switch (ch) {
case '{':
return object();
case '[':
return array();
case '"':
return string();
case '-':
return number();
default:
return ch >= '0' && ch <= '9' ? number() : word();
}
};
// Return the json_parse function. It will have access to all of the above
// functions and variables.
return function (source, reviver) {
var result;
text = source + '';
at = 0;
ch = ' ';
result = value();
white();
if (ch) {
error('Syntax error');
}
// If there is a reviver function, we recursively walk the new structure,
// passing each name/value pair to the reviver function for possible
// transformation, starting with a temporary root object that holds the result
// in an empty key. If there is not a reviver function, we simply return the
// result.
return typeof reviver === 'function'
? (function walk(holder, key) {
var k,
v,
value = holder[key];
if (value && typeof value === 'object') {
Object.keys(value).forEach(function (k) {
v = walk(value, k);
if (v !== undefined) {
value[k] = v;
} else {
delete value[k];
}
});
}
return reviver.call(holder, key, value);
})({ '': result }, '')
: result;
};
};
module.exports = json_parse;

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var BigNumber = require('bignumber.js');
/*
json2.js
2013-05-26
Public Domain.
NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
See http://www.JSON.org/js.html
This code should be minified before deployment.
See http://javascript.crockford.com/jsmin.html
USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
NOT CONTROL.
This file creates a global JSON object containing two methods: stringify
and parse.
JSON.stringify(value, replacer, space)
value any JavaScript value, usually an object or array.
replacer an optional parameter that determines how object
values are stringified for objects. It can be a
function or an array of strings.
space an optional parameter that specifies the indentation
of nested structures. If it is omitted, the text will
be packed without extra whitespace. If it is a number,
it will specify the number of spaces to indent at each
level. If it is a string (such as '\t' or '&nbsp;'),
it contains the characters used to indent at each level.
This method produces a JSON text from a JavaScript value.
When an object value is found, if the object contains a toJSON
method, its toJSON method will be called and the result will be
stringified. A toJSON method does not serialize: it returns the
value represented by the name/value pair that should be serialized,
or undefined if nothing should be serialized. The toJSON method
will be passed the key associated with the value, and this will be
bound to the value
For example, this would serialize Dates as ISO strings.
Date.prototype.toJSON = function (key) {
function f(n) {
// Format integers to have at least two digits.
return n < 10 ? '0' + n : n;
}
return this.getUTCFullYear() + '-' +
f(this.getUTCMonth() + 1) + '-' +
f(this.getUTCDate()) + 'T' +
f(this.getUTCHours()) + ':' +
f(this.getUTCMinutes()) + ':' +
f(this.getUTCSeconds()) + 'Z';
};
You can provide an optional replacer method. It will be passed the
key and value of each member, with this bound to the containing
object. The value that is returned from your method will be
serialized. If your method returns undefined, then the member will
be excluded from the serialization.
If the replacer parameter is an array of strings, then it will be
used to select the members to be serialized. It filters the results
such that only members with keys listed in the replacer array are
stringified.
Values that do not have JSON representations, such as undefined or
functions, will not be serialized. Such values in objects will be
dropped; in arrays they will be replaced with null. You can use
a replacer function to replace those with JSON values.
JSON.stringify(undefined) returns undefined.
The optional space parameter produces a stringification of the
value that is filled with line breaks and indentation to make it
easier to read.
If the space parameter is a non-empty string, then that string will
be used for indentation. If the space parameter is a number, then
the indentation will be that many spaces.
Example:
text = JSON.stringify(['e', {pluribus: 'unum'}]);
// text is '["e",{"pluribus":"unum"}]'
text = JSON.stringify(['e', {pluribus: 'unum'}], null, '\t');
// text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
text = JSON.stringify([new Date()], function (key, value) {
return this[key] instanceof Date ?
'Date(' + this[key] + ')' : value;
});
// text is '["Date(---current time---)"]'
JSON.parse(text, reviver)
This method parses a JSON text to produce an object or array.
It can throw a SyntaxError exception.
The optional reviver parameter is a function that can filter and
transform the results. It receives each of the keys and values,
and its return value is used instead of the original value.
If it returns what it received, then the structure is not modified.
If it returns undefined then the member is deleted.
Example:
// Parse the text. Values that look like ISO date strings will
// be converted to Date objects.
myData = JSON.parse(text, function (key, value) {
var a;
if (typeof value === 'string') {
a =
/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
if (a) {
return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
+a[5], +a[6]));
}
}
return value;
});
myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
var d;
if (typeof value === 'string' &&
value.slice(0, 5) === 'Date(' &&
value.slice(-1) === ')') {
d = new Date(value.slice(5, -1));
if (d) {
return d;
}
}
return value;
});
This is a reference implementation. You are free to copy, modify, or
redistribute.
*/
/*jslint evil: true, regexp: true */
/*members "", "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", apply,
call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
lastIndex, length, parse, prototype, push, replace, slice, stringify,
test, toJSON, toString, valueOf
*/
// Create a JSON object only if one does not already exist. We create the
// methods in a closure to avoid creating global variables.
var JSON = module.exports;
(function () {
'use strict';
function f(n) {
// Format integers to have at least two digits.
return n < 10 ? '0' + n : n;
}
var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
gap,
indent,
meta = { // table of character substitutions
'\b': '\\b',
'\t': '\\t',
'\n': '\\n',
'\f': '\\f',
'\r': '\\r',
'"' : '\\"',
'\\': '\\\\'
},
rep;
function quote(string) {
// If the string contains no control characters, no quote characters, and no
// backslash characters, then we can safely slap some quotes around it.
// Otherwise we must also replace the offending characters with safe escape
// sequences.
escapable.lastIndex = 0;
return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
var c = meta[a];
return typeof c === 'string'
? c
: '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
}) + '"' : '"' + string + '"';
}
function str(key, holder) {
// Produce a string from holder[key].
var i, // The loop counter.
k, // The member key.
v, // The member value.
length,
mind = gap,
partial,
value = holder[key],
isBigNumber = value != null && (value instanceof BigNumber || BigNumber.isBigNumber(value));
// If the value has a toJSON method, call it to obtain a replacement value.
if (value && typeof value === 'object' &&
typeof value.toJSON === 'function') {
value = value.toJSON(key);
}
// If we were called with a replacer function, then call the replacer to
// obtain a replacement value.
if (typeof rep === 'function') {
value = rep.call(holder, key, value);
}
// What happens next depends on the value's type.
switch (typeof value) {
case 'string':
if (isBigNumber) {
return value;
} else {
return quote(value);
}
case 'number':
// JSON numbers must be finite. Encode non-finite numbers as null.
return isFinite(value) ? String(value) : 'null';
case 'boolean':
case 'null':
case 'bigint':
// If the value is a boolean or null, convert it to a string. Note:
// typeof null does not produce 'null'. The case is included here in
// the remote chance that this gets fixed someday.
return String(value);
// If the type is 'object', we might be dealing with an object or an array or
// null.
case 'object':
// Due to a specification blunder in ECMAScript, typeof null is 'object',
// so watch out for that case.
if (!value) {
return 'null';
}
// Make an array to hold the partial results of stringifying this object value.
gap += indent;
partial = [];
// Is the value an array?
if (Object.prototype.toString.apply(value) === '[object Array]') {
// The value is an array. Stringify every element. Use null as a placeholder
// for non-JSON values.
length = value.length;
for (i = 0; i < length; i += 1) {
partial[i] = str(i, value) || 'null';
}
// Join all of the elements together, separated with commas, and wrap them in
// brackets.
v = partial.length === 0
? '[]'
: gap
? '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']'
: '[' + partial.join(',') + ']';
gap = mind;
return v;
}
// If the replacer is an array, use it to select the members to be stringified.
if (rep && typeof rep === 'object') {
length = rep.length;
for (i = 0; i < length; i += 1) {
if (typeof rep[i] === 'string') {
k = rep[i];
v = str(k, value);
if (v) {
partial.push(quote(k) + (gap ? ': ' : ':') + v);
}
}
}
} else {
// Otherwise, iterate through all of the keys in the object.
Object.keys(value).forEach(function(k) {
var v = str(k, value);
if (v) {
partial.push(quote(k) + (gap ? ': ' : ':') + v);
}
});
}
// Join all of the member texts together, separated with commas,
// and wrap them in braces.
v = partial.length === 0
? '{}'
: gap
? '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}'
: '{' + partial.join(',') + '}';
gap = mind;
return v;
}
}
// If the JSON object does not yet have a stringify method, give it one.
if (typeof JSON.stringify !== 'function') {
JSON.stringify = function (value, replacer, space) {
// The stringify method takes a value and an optional replacer, and an optional
// space parameter, and returns a JSON text. The replacer can be a function
// that can replace values, or an array of strings that will select the keys.
// A default replacer method can be provided. Use of the space parameter can
// produce text that is more easily readable.
var i;
gap = '';
indent = '';
// If the space parameter is a number, make an indent string containing that
// many spaces.
if (typeof space === 'number') {
for (i = 0; i < space; i += 1) {
indent += ' ';
}
// If the space parameter is a string, it will be used as the indent string.
} else if (typeof space === 'string') {
indent = space;
}
// If there is a replacer, it must be a function or an array.
// Otherwise, throw an error.
rep = replacer;
if (replacer && typeof replacer !== 'function' &&
(typeof replacer !== 'object' ||
typeof replacer.length !== 'number')) {
throw new Error('JSON.stringify');
}
// Make a fake root object containing our value under the key of ''.
// Return the result of stringifying the value.
return str('', {'': value});
};
}
}());

View File

@ -0,0 +1,34 @@
{
"name": "json-bigint",
"version": "1.0.0",
"description": "JSON.parse with bigints support",
"main": "index.js",
"files": [
"index.js",
"lib/parse.js",
"lib/stringify.js"
],
"scripts": {
"test": "./node_modules/mocha/bin/mocha -R spec --check-leaks test/*-test.js"
},
"repository": {
"type": "git",
"url": "git@github.com:sidorares/json-bigint.git"
},
"keywords": [
"JSON",
"bigint",
"bignumber",
"parse",
"json"
],
"author": "Andrey Sidorov <sidorares@yandex.ru>",
"license": "MIT",
"dependencies": {
"bignumber.js": "^9.0.0"
},
"devDependencies": {
"chai": "4.2.0",
"mocha": "8.0.1"
}
}