json.js
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上传日期:2021-09-03
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文件大小:10k
- /*
- Copyright (c) 2005 JSON.org
- 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 Software shall be used for Good, not Evil.
- 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.
- */
- var JSON = {
- org: 'http://www.JSON.org',
- copyright: '(c)2005 JSON.org',
- license: 'http://www.crockford.com/JSON/license.html',
- stringify: function stringify(arg) {
- var c, i, l, s = '', v;
- switch (typeof arg) {
- case 'object':
- if (arg) {
- if (arg.constructor == Array) {
- for (i = 0; i < arg.length; ++i) {
- v = this.stringify(arg[i]);
- if (s) {
- s += ',';
- }
- s += v;
- }
- return '[' + s + ']';
- } else if (typeof arg.toString != 'undefined') {
- for (i in arg) {
- v = arg[i];
- if (typeof v != 'undefined' && typeof v != 'function') {
- v = this.stringify(v);
- if (s) {
- s += ',';
- }
- s += this.stringify(i) + ':' + v;
- }
- }
- return '{' + s + '}';
- }
- }
- return 'null';
- case 'number':
- return isFinite(arg) ? String(arg) : 'null';
- case 'string':
- l = arg.length;
- s = '"';
- for (i = 0; i < l; i += 1) {
- c = arg.charAt(i);
- if (c >= ' ') {
- if (c == '\' || c == '"') {
- s += '\';
- }
- s += c;
- } else {
- switch (c) {
- case 'b':
- s += '\b';
- break;
- case 'f':
- s += '\f';
- break;
- case 'n':
- s += '\n';
- break;
- case 'r':
- s += '\r';
- break;
- case 't':
- s += '\t';
- break;
- default:
- c = c.charCodeAt();
- s += '\u00' + Math.floor(c / 16).toString(16) +
- (c % 16).toString(16);
- }
- }
- }
- return s + '"';
- case 'boolean':
- return String(arg);
- default:
- return 'null';
- }
- },
- parse: function (text) {
- var at = 0;
- var ch = ' ';
- function error(m) {
- throw {
- name: 'JSONError',
- message: m,
- at: at - 1,
- text: text
- };
- }
- function next() {
- ch = text.charAt(at);
- at += 1;
- return ch;
- }
- function white() {
- while (ch) {
- if (ch <= ' ') {
- next();
- } else if (ch == '/') {
- switch (next()) {
- case '/':
- while (next() && ch != 'n' && ch != 'r') {}
- break;
- case '*':
- next();
- for (;;) {
- if (ch) {
- if (ch == '*') {
- if (next() == '/') {
- next();
- break;
- }
- } else {
- next();
- }
- } else {
- error("Unterminated comment");
- }
- }
- break;
- default:
- error("Syntax error");
- }
- } else {
- break;
- }
- }
- }
- function string() {
- var i, s = '', t, u;
- if (ch == '"') {
- outer: while (next()) {
- if (ch == '"') {
- next();
- return s;
- } else if (ch == '\') {
- switch (next()) {
- case 'b':
- s += 'b';
- break;
- case 'f':
- s += 'f';
- break;
- case 'n':
- s += 'n';
- break;
- case 'r':
- s += 'r';
- break;
- case 't':
- s += 't';
- break;
- case 'u':
- u = 0;
- for (i = 0; i < 4; i += 1) {
- t = parseInt(next(), 16);
- if (!isFinite(t)) {
- break outer;
- }
- u = u * 16 + t;
- }
- s += String.fromCharCode(u);
- break;
- default:
- s += ch;
- }
- } else {
- s += ch;
- }
- }
- }
- error("Bad string");
- }
- function array() {
- var a = [];
- if (ch == '[') {
- next();
- white();
- if (ch == ']') {
- next();
- return a;
- }
- while (ch) {
- a.push(value());
- white();
- if (ch == ']') {
- next();
- return a;
- } else if (ch != ',') {
- break;
- }
- next();
- white();
- }
- }
- error("Bad array");
- }
- function object() {
- var k, o = {};
- if (ch == '{') {
- next();
- white();
- if (ch == '}') {
- next();
- return o;
- }
- while (ch) {
- k = string();
- white();
- if (ch != ':') {
- break;
- }
- next();
- o[k] = value();
- white();
- if (ch == '}') {
- next();
- return o;
- } else if (ch != ',') {
- break;
- }
- next();
- white();
- }
- }
- error("Bad object");
- }
- function number() {
- var n = '', v;
- if (ch == '-') {
- n = '-';
- next();
- }
- while (ch >= '0' && ch <= '9') {
- n += ch;
- next();
- }
- if (ch == '.') {
- n += '.';
- while (next() && ch >= '0' && ch <= '9') {
- n += ch;
- }
- }
- v = +n;
- if (!isFinite(v)) {
- error("Bad number");
- } else {
- return v;
- }
- }
- function word() {
- switch (ch) {
- case 't':
- if (next() == 'r' && next() == 'u' && next() == 'e') {
- next();
- return true;
- }
- break;
- case 'f':
- if (next() == 'a' && next() == 'l' && next() == 's' &&
- next() == 'e') {
- next();
- return false;
- }
- break;
- case 'n':
- if (next() == 'u' && next() == 'l' && next() == 'l') {
- next();
- return null;
- }
- break;
- }
- error("Syntax error");
- }
- function value() {
- white();
- switch (ch) {
- case '{':
- return object();
- case '[':
- return array();
- case '"':
- return string();
- case '-':
- return number();
- default:
- return ch >= '0' && ch <= '9' ? number() : word();
- }
- }
- return value();
- }
- };