source: trip-planner-front/node_modules/iconv-lite/lib/index.js@ e29cc2e

Last change on this file since e29cc2e was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 5.0 KB
Line 
1"use strict";
2
3// Some environments don't have global Buffer (e.g. React Native).
4// Solution would be installing npm modules "buffer" and "stream" explicitly.
5var Buffer = require("safer-buffer").Buffer;
6
7var bomHandling = require("./bom-handling"),
8 iconv = module.exports;
9
10// All codecs and aliases are kept here, keyed by encoding name/alias.
11// They are lazy loaded in `iconv.getCodec` from `encodings/index.js`.
12iconv.encodings = null;
13
14// Characters emitted in case of error.
15iconv.defaultCharUnicode = '�';
16iconv.defaultCharSingleByte = '?';
17
18// Public API.
19iconv.encode = function encode(str, encoding, options) {
20 str = "" + (str || ""); // Ensure string.
21
22 var encoder = iconv.getEncoder(encoding, options);
23
24 var res = encoder.write(str);
25 var trail = encoder.end();
26
27 return (trail && trail.length > 0) ? Buffer.concat([res, trail]) : res;
28}
29
30iconv.decode = function decode(buf, encoding, options) {
31 if (typeof buf === 'string') {
32 if (!iconv.skipDecodeWarning) {
33 console.error('Iconv-lite warning: decode()-ing strings is deprecated. Refer to https://github.com/ashtuchkin/iconv-lite/wiki/Use-Buffers-when-decoding');
34 iconv.skipDecodeWarning = true;
35 }
36
37 buf = Buffer.from("" + (buf || ""), "binary"); // Ensure buffer.
38 }
39
40 var decoder = iconv.getDecoder(encoding, options);
41
42 var res = decoder.write(buf);
43 var trail = decoder.end();
44
45 return trail ? (res + trail) : res;
46}
47
48iconv.encodingExists = function encodingExists(enc) {
49 try {
50 iconv.getCodec(enc);
51 return true;
52 } catch (e) {
53 return false;
54 }
55}
56
57// Legacy aliases to convert functions
58iconv.toEncoding = iconv.encode;
59iconv.fromEncoding = iconv.decode;
60
61// Search for a codec in iconv.encodings. Cache codec data in iconv._codecDataCache.
62iconv._codecDataCache = {};
63iconv.getCodec = function getCodec(encoding) {
64 if (!iconv.encodings)
65 iconv.encodings = require("../encodings"); // Lazy load all encoding definitions.
66
67 // Canonicalize encoding name: strip all non-alphanumeric chars and appended year.
68 var enc = iconv._canonicalizeEncoding(encoding);
69
70 // Traverse iconv.encodings to find actual codec.
71 var codecOptions = {};
72 while (true) {
73 var codec = iconv._codecDataCache[enc];
74 if (codec)
75 return codec;
76
77 var codecDef = iconv.encodings[enc];
78
79 switch (typeof codecDef) {
80 case "string": // Direct alias to other encoding.
81 enc = codecDef;
82 break;
83
84 case "object": // Alias with options. Can be layered.
85 for (var key in codecDef)
86 codecOptions[key] = codecDef[key];
87
88 if (!codecOptions.encodingName)
89 codecOptions.encodingName = enc;
90
91 enc = codecDef.type;
92 break;
93
94 case "function": // Codec itself.
95 if (!codecOptions.encodingName)
96 codecOptions.encodingName = enc;
97
98 // The codec function must load all tables and return object with .encoder and .decoder methods.
99 // It'll be called only once (for each different options object).
100 codec = new codecDef(codecOptions, iconv);
101
102 iconv._codecDataCache[codecOptions.encodingName] = codec; // Save it to be reused later.
103 return codec;
104
105 default:
106 throw new Error("Encoding not recognized: '" + encoding + "' (searched as: '"+enc+"')");
107 }
108 }
109}
110
111iconv._canonicalizeEncoding = function(encoding) {
112 // Canonicalize encoding name: strip all non-alphanumeric chars and appended year.
113 return (''+encoding).toLowerCase().replace(/:\d{4}$|[^0-9a-z]/g, "");
114}
115
116iconv.getEncoder = function getEncoder(encoding, options) {
117 var codec = iconv.getCodec(encoding),
118 encoder = new codec.encoder(options, codec);
119
120 if (codec.bomAware && options && options.addBOM)
121 encoder = new bomHandling.PrependBOM(encoder, options);
122
123 return encoder;
124}
125
126iconv.getDecoder = function getDecoder(encoding, options) {
127 var codec = iconv.getCodec(encoding),
128 decoder = new codec.decoder(options, codec);
129
130 if (codec.bomAware && !(options && options.stripBOM === false))
131 decoder = new bomHandling.StripBOM(decoder, options);
132
133 return decoder;
134}
135
136
137// Load extensions in Node. All of them are omitted in Browserify build via 'browser' field in package.json.
138var nodeVer = typeof process !== 'undefined' && process.versions && process.versions.node;
139if (nodeVer) {
140
141 // Load streaming support in Node v0.10+
142 var nodeVerArr = nodeVer.split(".").map(Number);
143 if (nodeVerArr[0] > 0 || nodeVerArr[1] >= 10) {
144 require("./streams")(iconv);
145 }
146
147 // Load Node primitive extensions.
148 require("./extend-node")(iconv);
149}
150
151if ("Ā" != "\u0100") {
152 console.error("iconv-lite warning: javascript files use encoding different from utf-8. See https://github.com/ashtuchkin/iconv-lite/wiki/Javascript-source-file-encodings for more info.");
153}
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