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"use strict"; |
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var Buffer = require("safer-buffer").Buffer; |
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var bomHandling = require("./bom-handling"), |
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iconv = module.exports; |
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// All codecs and aliases are kept here, keyed by encoding name/alias. |
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// They are lazy loaded in `iconv.getCodec` from `encodings/index.js`. |
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iconv.encodings = null; |
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// Characters emitted in case of error. |
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iconv.defaultCharUnicode = '<EFBFBD>'; |
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iconv.defaultCharSingleByte = '?'; |
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// Public API. |
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iconv.encode = function encode(str, encoding, options) { |
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str = "" + (str || ""); // Ensure string. |
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var encoder = iconv.getEncoder(encoding, options); |
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var res = encoder.write(str); |
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var trail = encoder.end(); |
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return (trail && trail.length > 0) ? Buffer.concat([res, trail]) : res; |
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} |
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iconv.decode = function decode(buf, encoding, options) { |
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if (typeof buf === 'string') { |
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if (!iconv.skipDecodeWarning) { |
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console.error('Iconv-lite warning: decode()-ing strings is deprecated. Refer to https://github.com/ashtuchkin/iconv-lite/wiki/Use-Buffers-when-decoding'); |
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iconv.skipDecodeWarning = true; |
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} |
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buf = Buffer.from("" + (buf || ""), "binary"); // Ensure buffer. |
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} |
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var decoder = iconv.getDecoder(encoding, options); |
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var res = decoder.write(buf); |
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var trail = decoder.end(); |
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return trail ? (res + trail) : res; |
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} |
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iconv.encodingExists = function encodingExists(enc) { |
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try { |
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iconv.getCodec(enc); |
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return true; |
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} catch (e) { |
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return false; |
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} |
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} |
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// Legacy aliases to convert functions |
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iconv.toEncoding = iconv.encode; |
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iconv.fromEncoding = iconv.decode; |
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// Search for a codec in iconv.encodings. Cache codec data in iconv._codecDataCache. |
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iconv._codecDataCache = {}; |
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iconv.getCodec = function getCodec(encoding) { |
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if (!iconv.encodings) |
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iconv.encodings = require("../encodings"); // Lazy load all encoding definitions. |
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// Canonicalize encoding name: strip all non-alphanumeric chars and appended year. |
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var enc = iconv._canonicalizeEncoding(encoding); |
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// Traverse iconv.encodings to find actual codec. |
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var codecOptions = {}; |
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while (true) { |
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var codec = iconv._codecDataCache[enc]; |
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if (codec) |
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return codec; |
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var codecDef = iconv.encodings[enc]; |
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switch (typeof codecDef) { |
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case "string": // Direct alias to other encoding. |
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enc = codecDef; |
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break; |
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case "object": // Alias with options. Can be layered. |
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for (var key in codecDef) |
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codecOptions[key] = codecDef[key]; |
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if (!codecOptions.encodingName) |
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codecOptions.encodingName = enc; |
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enc = codecDef.type; |
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break; |
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case "function": // Codec itself. |
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if (!codecOptions.encodingName) |
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codecOptions.encodingName = enc; |
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// The codec function must load all tables and return object with .encoder and .decoder methods. |
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// It'll be called only once (for each different options object). |
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codec = new codecDef(codecOptions, iconv); |
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iconv._codecDataCache[codecOptions.encodingName] = codec; // Save it to be reused later. |
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return codec; |
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default: |
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throw new Error("Encoding not recognized: '" + encoding + "' (searched as: '"+enc+"')"); |
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} |
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} |
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} |
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iconv._canonicalizeEncoding = function(encoding) { |
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// Canonicalize encoding name: strip all non-alphanumeric chars and appended year. |
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return (''+encoding).toLowerCase().replace(/:\d{4}$|[^0-9a-z]/g, ""); |
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} |
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iconv.getEncoder = function getEncoder(encoding, options) { |
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var codec = iconv.getCodec(encoding), |
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encoder = new codec.encoder(options, codec); |
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if (codec.bomAware && options && options.addBOM) |
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encoder = new bomHandling.PrependBOM(encoder, options); |
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return encoder; |
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} |
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iconv.getDecoder = function getDecoder(encoding, options) { |
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var codec = iconv.getCodec(encoding), |
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decoder = new codec.decoder(options, codec); |
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if (codec.bomAware && !(options && options.stripBOM === false)) |
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decoder = new bomHandling.StripBOM(decoder, options); |
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return decoder; |
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} |
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// Streaming API |
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// NOTE: Streaming API naturally depends on 'stream' module from Node.js. Unfortunately in browser environments this module can add |
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// up to 100Kb to the output bundle. To avoid unnecessary code bloat, we don't enable Streaming API in browser by default. |
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// If you would like to enable it explicitly, please add the following code to your app: |
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// > iconv.enableStreamingAPI(require('stream')); |
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iconv.enableStreamingAPI = function enableStreamingAPI(stream_module) { |
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if (iconv.supportsStreams) |
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return; |
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// Dependency-inject stream module to create IconvLite stream classes. |
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var streams = require("./streams")(stream_module); |
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// Not public API yet, but expose the stream classes. |
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iconv.IconvLiteEncoderStream = streams.IconvLiteEncoderStream; |
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iconv.IconvLiteDecoderStream = streams.IconvLiteDecoderStream; |
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// Streaming API. |
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iconv.encodeStream = function encodeStream(encoding, options) { |
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return new iconv.IconvLiteEncoderStream(iconv.getEncoder(encoding, options), options); |
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} |
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iconv.decodeStream = function decodeStream(encoding, options) { |
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return new iconv.IconvLiteDecoderStream(iconv.getDecoder(encoding, options), options); |
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} |
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iconv.supportsStreams = true; |
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} |
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// Enable Streaming API automatically if 'stream' module is available and non-empty (the majority of environments). |
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var stream_module; |
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try { |
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stream_module = require("stream"); |
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} catch (e) {} |
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if (stream_module && stream_module.Transform) { |
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iconv.enableStreamingAPI(stream_module); |
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} else { |
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// In rare cases where 'stream' module is not available by default, throw a helpful exception. |
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iconv.encodeStream = iconv.decodeStream = function() { |
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throw new Error("iconv-lite Streaming API is not enabled. Use iconv.enableStreamingAPI(require('stream')); to enable it."); |
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}; |
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} |
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if ("Ā" != "\u0100") { |
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console.error("iconv-lite warning: js files use non-utf8 encoding. See https://github.com/ashtuchkin/iconv-lite/wiki/Javascript-source-file-encodings for more info."); |
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}
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