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Diffstat (limited to 'node_modules/iconv-lite/lib/index.js')
-rw-r--r-- | node_modules/iconv-lite/lib/index.js | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/node_modules/iconv-lite/lib/index.js b/node_modules/iconv-lite/lib/index.js new file mode 100644 index 000000000..ac1403c50 --- /dev/null +++ b/node_modules/iconv-lite/lib/index.js @@ -0,0 +1,141 @@ +"use strict" + +var bomHandling = require('./bom-handling'), + iconv = module.exports; + +// All codecs and aliases are kept here, keyed by encoding name/alias. +// They are lazy loaded in `iconv.getCodec` from `encodings/index.js`. +iconv.encodings = null; + +// Characters emitted in case of error. +iconv.defaultCharUnicode = '�'; +iconv.defaultCharSingleByte = '?'; + +// Public API. +iconv.encode = function encode(str, encoding, options) { + str = "" + (str || ""); // Ensure string. + + var encoder = iconv.getEncoder(encoding, options); + + var res = encoder.write(str); + var trail = encoder.end(); + + return (trail && trail.length > 0) ? Buffer.concat([res, trail]) : res; +} + +iconv.decode = function decode(buf, encoding, options) { + if (typeof buf === 'string') { + if (!iconv.skipDecodeWarning) { + console.error('Iconv-lite warning: decode()-ing strings is deprecated. Refer to https://github.com/ashtuchkin/iconv-lite/wiki/Use-Buffers-when-decoding'); + iconv.skipDecodeWarning = true; + } + + buf = new Buffer("" + (buf || ""), "binary"); // Ensure buffer. + } + + var decoder = iconv.getDecoder(encoding, options); + + var res = decoder.write(buf); + var trail = decoder.end(); + + return trail ? (res + trail) : res; +} + +iconv.encodingExists = function encodingExists(enc) { + try { + iconv.getCodec(enc); + return true; + } catch (e) { + return false; + } +} + +// Legacy aliases to convert functions +iconv.toEncoding = iconv.encode; +iconv.fromEncoding = iconv.decode; + +// Search for a codec in iconv.encodings. Cache codec data in iconv._codecDataCache. +iconv._codecDataCache = {}; +iconv.getCodec = function getCodec(encoding) { + if (!iconv.encodings) + iconv.encodings = require("../encodings"); // Lazy load all encoding definitions. + + // Canonicalize encoding name: strip all non-alphanumeric chars and appended year. + var enc = (''+encoding).toLowerCase().replace(/[^0-9a-z]|:\d{4}$/g, ""); + + // Traverse iconv.encodings to find actual codec. + var codecOptions = {}; + while (true) { + var codec = iconv._codecDataCache[enc]; + if (codec) + return codec; + + var codecDef = iconv.encodings[enc]; + + switch (typeof codecDef) { + case "string": // Direct alias to other encoding. + enc = codecDef; + break; + + case "object": // Alias with options. Can be layered. + for (var key in codecDef) + codecOptions[key] = codecDef[key]; + + if (!codecOptions.encodingName) + codecOptions.encodingName = enc; + + enc = codecDef.type; + break; + + case "function": // Codec itself. + if (!codecOptions.encodingName) + codecOptions.encodingName = enc; + + // The codec function must load all tables and return object with .encoder and .decoder methods. + // It'll be called only once (for each different options object). + codec = new codecDef(codecOptions, iconv); + + iconv._codecDataCache[codecOptions.encodingName] = codec; // Save it to be reused later. + return codec; + + default: + throw new Error("Encoding not recognized: '" + encoding + "' (searched as: '"+enc+"')"); + } + } +} + +iconv.getEncoder = function getEncoder(encoding, options) { + var codec = iconv.getCodec(encoding), + encoder = new codec.encoder(options, codec); + + if (codec.bomAware && options && options.addBOM) + encoder = new bomHandling.PrependBOM(encoder, options); + + return encoder; +} + +iconv.getDecoder = function getDecoder(encoding, options) { + var codec = iconv.getCodec(encoding), + decoder = new codec.decoder(options, codec); + + if (codec.bomAware && !(options && options.stripBOM === false)) + decoder = new bomHandling.StripBOM(decoder, options); + + return decoder; +} + + +// Load extensions in Node. All of them are omitted in Browserify build via 'browser' field in package.json. +var nodeVer = typeof process !== 'undefined' && process.versions && process.versions.node; +if (nodeVer) { + + // Load streaming support in Node v0.10+ + var nodeVerArr = nodeVer.split(".").map(Number); + if (nodeVerArr[0] > 0 || nodeVerArr[1] >= 10) { + require("./streams")(iconv); + } + + // Load Node primitive extensions. + require("./extend-node")(iconv); +} + |