| "use strict"; |
| |
| 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; |
| } |
| |
| // Streaming API |
| // NOTE: Streaming API naturally depends on 'stream' module from Node.js. Unfortunately in browser environments this module can add |
| // up to 100Kb to the output bundle. To avoid unnecessary code bloat, we don't enable Streaming API in browser by default. |
| // If you would like to enable it explicitly, please add the following code to your app: |
| // > iconv.enableStreamingAPI(require('stream')); |
| iconv.enableStreamingAPI = function enableStreamingAPI(stream_module) { |
| if (iconv.supportsStreams) |
| return; |
| |
| // Dependency-inject stream module to create IconvLite stream classes. |
| var streams = require("./streams")(stream_module); |
| |
| // Not public API yet, but expose the stream classes. |
| iconv.IconvLiteEncoderStream = streams.IconvLiteEncoderStream; |
| iconv.IconvLiteDecoderStream = streams.IconvLiteDecoderStream; |
| |
| // Streaming API. |
| iconv.encodeStream = function encodeStream(encoding, options) { |
| return new iconv.IconvLiteEncoderStream(iconv.getEncoder(encoding, options), options); |
| } |
| |
| iconv.decodeStream = function decodeStream(encoding, options) { |
| return new iconv.IconvLiteDecoderStream(iconv.getDecoder(encoding, options), options); |
| } |
| |
| iconv.supportsStreams = true; |
| } |
| |
| // Enable Streaming API automatically if 'stream' module is available and non-empty (the majority of environments). |
| var stream_module; |
| try { |
| stream_module = require("stream"); |
| } catch (e) {} |
| |
| if (stream_module && stream_module.Transform) { |
| iconv.enableStreamingAPI(stream_module); |
| |
| } else { |
| // In rare cases where 'stream' module is not available by default, throw a helpful exception. |
| iconv.encodeStream = iconv.decodeStream = function() { |
| throw new Error("iconv-lite Streaming API is not enabled. Use iconv.enableStreamingAPI(require('stream')); to enable it."); |
| }; |
| } |
| |
| if ("Ā" != "\u0100") { |
| 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."); |
| } |