1 | var BigNumber = require('bignumber.js');
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2 |
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3 | /*
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4 | json2.js
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5 | 2013-05-26
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6 |
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7 | Public Domain.
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8 |
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9 | NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
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10 |
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11 | See http://www.JSON.org/js.html
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12 |
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13 |
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14 | This code should be minified before deployment.
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15 | See http://javascript.crockford.com/jsmin.html
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16 |
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17 | USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
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18 | NOT CONTROL.
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19 |
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20 |
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21 | This file creates a global JSON object containing two methods: stringify
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22 | and parse.
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23 |
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24 | JSON.stringify(value, replacer, space)
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25 | value any JavaScript value, usually an object or array.
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26 |
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27 | replacer an optional parameter that determines how object
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28 | values are stringified for objects. It can be a
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29 | function or an array of strings.
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30 |
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31 | space an optional parameter that specifies the indentation
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32 | of nested structures. If it is omitted, the text will
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33 | be packed without extra whitespace. If it is a number,
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34 | it will specify the number of spaces to indent at each
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35 | level. If it is a string (such as '\t' or ' '),
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36 | it contains the characters used to indent at each level.
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37 |
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38 | This method produces a JSON text from a JavaScript value.
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39 |
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40 | When an object value is found, if the object contains a toJSON
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41 | method, its toJSON method will be called and the result will be
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42 | stringified. A toJSON method does not serialize: it returns the
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43 | value represented by the name/value pair that should be serialized,
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44 | or undefined if nothing should be serialized. The toJSON method
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45 | will be passed the key associated with the value, and this will be
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46 | bound to the value
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47 |
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48 | For example, this would serialize Dates as ISO strings.
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49 |
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50 | Date.prototype.toJSON = function (key) {
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51 | function f(n) {
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52 | // Format integers to have at least two digits.
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53 | return n < 10 ? '0' + n : n;
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54 | }
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55 |
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56 | return this.getUTCFullYear() + '-' +
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57 | f(this.getUTCMonth() + 1) + '-' +
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58 | f(this.getUTCDate()) + 'T' +
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59 | f(this.getUTCHours()) + ':' +
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60 | f(this.getUTCMinutes()) + ':' +
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61 | f(this.getUTCSeconds()) + 'Z';
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62 | };
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63 |
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64 | You can provide an optional replacer method. It will be passed the
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65 | key and value of each member, with this bound to the containing
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66 | object. The value that is returned from your method will be
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67 | serialized. If your method returns undefined, then the member will
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68 | be excluded from the serialization.
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69 |
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70 | If the replacer parameter is an array of strings, then it will be
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71 | used to select the members to be serialized. It filters the results
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72 | such that only members with keys listed in the replacer array are
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73 | stringified.
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74 |
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75 | Values that do not have JSON representations, such as undefined or
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76 | functions, will not be serialized. Such values in objects will be
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77 | dropped; in arrays they will be replaced with null. You can use
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78 | a replacer function to replace those with JSON values.
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79 | JSON.stringify(undefined) returns undefined.
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80 |
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81 | The optional space parameter produces a stringification of the
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82 | value that is filled with line breaks and indentation to make it
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83 | easier to read.
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84 |
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85 | If the space parameter is a non-empty string, then that string will
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86 | be used for indentation. If the space parameter is a number, then
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87 | the indentation will be that many spaces.
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88 |
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89 | Example:
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90 |
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91 | text = JSON.stringify(['e', {pluribus: 'unum'}]);
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92 | // text is '["e",{"pluribus":"unum"}]'
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93 |
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94 |
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95 | text = JSON.stringify(['e', {pluribus: 'unum'}], null, '\t');
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96 | // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
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97 |
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98 | text = JSON.stringify([new Date()], function (key, value) {
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99 | return this[key] instanceof Date ?
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100 | 'Date(' + this[key] + ')' : value;
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101 | });
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102 | // text is '["Date(---current time---)"]'
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103 |
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104 |
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105 | JSON.parse(text, reviver)
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106 | This method parses a JSON text to produce an object or array.
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107 | It can throw a SyntaxError exception.
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108 |
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109 | The optional reviver parameter is a function that can filter and
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110 | transform the results. It receives each of the keys and values,
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111 | and its return value is used instead of the original value.
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112 | If it returns what it received, then the structure is not modified.
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113 | If it returns undefined then the member is deleted.
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114 |
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115 | Example:
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116 |
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117 | // Parse the text. Values that look like ISO date strings will
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118 | // be converted to Date objects.
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119 |
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120 | myData = JSON.parse(text, function (key, value) {
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121 | var a;
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122 | if (typeof value === 'string') {
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123 | a =
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124 | /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
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125 | if (a) {
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126 | return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
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127 | +a[5], +a[6]));
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128 | }
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129 | }
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130 | return value;
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131 | });
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132 |
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133 | myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
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134 | var d;
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135 | if (typeof value === 'string' &&
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136 | value.slice(0, 5) === 'Date(' &&
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137 | value.slice(-1) === ')') {
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138 | d = new Date(value.slice(5, -1));
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139 | if (d) {
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140 | return d;
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141 | }
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142 | }
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143 | return value;
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144 | });
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145 |
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146 |
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147 | This is a reference implementation. You are free to copy, modify, or
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148 | redistribute.
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149 | */
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150 |
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151 | /*jslint evil: true, regexp: true */
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152 |
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153 | /*members "", "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", apply,
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154 | call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
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155 | getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
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156 | lastIndex, length, parse, prototype, push, replace, slice, stringify,
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157 | test, toJSON, toString, valueOf
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158 | */
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159 |
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160 |
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161 | // Create a JSON object only if one does not already exist. We create the
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162 | // methods in a closure to avoid creating global variables.
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163 |
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164 | var JSON = module.exports;
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165 |
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166 | (function () {
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167 | ;
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168 |
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169 | function f(n) {
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170 | // Format integers to have at least two digits.
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171 | return n < 10 ? '0' + n : n;
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172 | }
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173 |
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174 | var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
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175 | escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
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176 | gap,
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177 | indent,
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178 | meta = { // table of character substitutions
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179 | '\b': '\\b',
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180 | '\t': '\\t',
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181 | '\n': '\\n',
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182 | '\f': '\\f',
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183 | '\r': '\\r',
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184 | '"' : '\\"',
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185 | '\\': '\\\\'
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186 | },
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187 | rep;
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188 |
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189 |
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190 | function quote(string) {
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191 |
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192 | // If the string contains no control characters, no quote characters, and no
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193 | // backslash characters, then we can safely slap some quotes around it.
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194 | // Otherwise we must also replace the offending characters with safe escape
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195 | // sequences.
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196 |
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197 | escapable.lastIndex = 0;
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198 | return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
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199 | var c = meta[a];
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200 | return typeof c === 'string'
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201 | ? c
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202 | : '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
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203 | }) + '"' : '"' + string + '"';
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204 | }
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205 |
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206 |
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207 | function str(key, holder) {
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208 |
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209 | // Produce a string from holder[key].
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210 |
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211 | var i, // The loop counter.
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212 | k, // The member key.
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213 | v, // The member value.
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214 | length,
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215 | mind = gap,
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216 | partial,
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217 | value = holder[key];
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218 |
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219 | // If the value has a toJSON method, call it to obtain a replacement value.
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220 |
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221 | if (value && typeof value === 'object' &&
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222 | typeof value.toJSON === 'function') {
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223 | value = value.toJSON(key);
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224 | }
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225 |
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226 | // If we were called with a replacer function, then call the replacer to
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227 | // obtain a replacement value.
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228 |
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229 | if (typeof rep === 'function') {
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230 | value = rep.call(holder, key, value);
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231 | }
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232 |
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233 | // What happens next depends on the value's type.
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234 |
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235 | switch (typeof value) {
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236 | case 'string':
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237 | return quote(value);
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238 |
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239 | case 'number':
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240 |
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241 | // JSON numbers must be finite. Encode non-finite numbers as null.
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242 |
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243 | return isFinite(value) ? String(value) : 'null';
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244 |
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245 | case 'boolean':
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246 | case 'null':
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247 |
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248 | // If the value is a boolean or null, convert it to a string. Note:
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249 | // typeof null does not produce 'null'. The case is included here in
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250 | // the remote chance that this gets fixed someday.
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251 |
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252 | return String(value);
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253 |
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254 | // If the type is 'object', we might be dealing with an object or an array or
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255 | // null.
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256 |
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257 | case 'object':
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258 |
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259 | // Due to a specification blunder in ECMAScript, typeof null is 'object',
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260 | // so watch out for that case.
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261 |
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262 | if (!value) {
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263 | return 'null';
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264 | }
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265 |
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266 | if (value instanceof BigNumber)
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267 | return value.toString();
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268 |
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269 | // Make an array to hold the partial results of stringifying this object value.
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270 |
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271 | gap += indent;
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272 | partial = [];
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273 |
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274 | // Is the value an array?
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275 |
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276 | if (Object.prototype.toString.apply(value) === '[object Array]') {
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277 |
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278 | // The value is an array. Stringify every element. Use null as a placeholder
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279 | // for non-JSON values.
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280 |
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281 | length = value.length;
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282 | for (i = 0; i < length; i += 1) {
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283 | partial[i] = str(i, value) || 'null';
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284 | }
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285 |
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286 | // Join all of the elements together, separated with commas, and wrap them in
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287 | // brackets.
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288 |
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289 | v = partial.length === 0
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290 | ? '[]'
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291 | : gap
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292 | ? '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']'
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293 | : '[' + partial.join(',') + ']';
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294 | gap = mind;
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295 | return v;
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296 | }
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297 |
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298 | // If the replacer is an array, use it to select the members to be stringified.
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299 |
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300 | if (rep && typeof rep === 'object') {
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301 | length = rep.length;
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302 | for (i = 0; i < length; i += 1) {
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303 | if (typeof rep[i] === 'string') {
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304 | k = rep[i];
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305 | v = str(k, value);
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306 | if (v) {
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307 | partial.push(quote(k) + (gap ? ': ' : ':') + v);
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308 | }
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309 | }
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310 | }
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311 | } else {
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312 |
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313 | // Otherwise, iterate through all of the keys in the object.
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314 |
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315 | for (k in value) {
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316 | if (Object.prototype.hasOwnProperty.call(value, k)) {
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317 | v = str(k, value);
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318 | if (v) {
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319 | partial.push(quote(k) + (gap ? ': ' : ':') + v);
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320 | }
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321 | }
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322 | }
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323 | }
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324 |
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325 | // Join all of the member texts together, separated with commas,
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326 | // and wrap them in braces.
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327 |
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328 | v = partial.length === 0
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329 | ? '{}'
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330 | : gap
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331 | ? '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}'
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332 | : '{' + partial.join(',') + '}';
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333 | gap = mind;
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334 | return v;
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335 | }
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336 | }
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337 |
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338 | // If the JSON object does not yet have a stringify method, give it one.
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339 |
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340 | if (typeof JSON.stringify !== 'function') {
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341 | JSON.stringify = function (value, replacer, space) {
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342 |
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343 | // The stringify method takes a value and an optional replacer, and an optional
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344 | // space parameter, and returns a JSON text. The replacer can be a function
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345 | // that can replace values, or an array of strings that will select the keys.
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346 | // A default replacer method can be provided. Use of the space parameter can
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347 | // produce text that is more easily readable.
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348 |
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349 | var i;
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350 | gap = '';
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351 | indent = '';
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352 |
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353 | // If the space parameter is a number, make an indent string containing that
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354 | // many spaces.
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355 |
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356 | if (typeof space === 'number') {
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357 | for (i = 0; i < space; i += 1) {
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358 | indent += ' ';
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359 | }
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360 |
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361 | // If the space parameter is a string, it will be used as the indent string.
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362 |
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363 | } else if (typeof space === 'string') {
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364 | indent = space;
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365 | }
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366 |
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367 | // If there is a replacer, it must be a function or an array.
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368 | // Otherwise, throw an error.
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369 |
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370 | rep = replacer;
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371 | if (replacer && typeof replacer !== 'function' &&
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372 | (typeof replacer !== 'object' ||
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373 | typeof replacer.length !== 'number')) {
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374 | throw new Error('JSON.stringify');
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375 | }
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376 |
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377 | // Make a fake root object containing our value under the key of ''.
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378 | // Return the result of stringifying the value.
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379 |
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380 | return str('', {'': value});
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381 | };
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382 | }
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383 | }());
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