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"use strict"; // Some environments don't have global Buffer (e.g. React Native). // Solution would be installing npm modules "buffer" and "stream" explicitly. var Buffer = require("safer-buffer").Buffer; 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 = Buffer.from("" + (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 = iconv._canonicalizeEncoding(encoding); // 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._canonicalizeEncoding = function(encoding) { // Canonicalize encoding name: strip all non-alphanumeric chars and appended year. return (''+encoding).toLowerCase().replace(/:\d{4}$|[^0-9a-z]/g, ""); } 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); } if ("Ā" != "\u0100") { 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."); }
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