407 lines
18 KiB
JavaScript
407 lines
18 KiB
JavaScript
/**
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* node-singlebyte
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*/
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// The MIT License (MIT)
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//
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// Copyright (c) 2013, Sergey Sokoloff (aka Mithgol the Webmaster).
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// https://github.com/Mithgol/node-singlebyte
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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var extend = function(target) {
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target = target || {};
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Array.prototype.slice.call(arguments, 1).forEach(function(obj) {
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Object.keys(obj || {}).forEach(function(key) {
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target[key] = obj[key];
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});
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});
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return target;
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};
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var singlebyte = function(){
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/* jshint indent: false */
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if(!( this instanceof singlebyte )){
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return new singlebyte();
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}
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this.encodings = [];
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// CP437
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this.learnEncoding('cp437', this.extendASCII([
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0xC7, 0xFC, 0xE9, 0xE2, 0xE4, 0xE0, 0xE5, 0xE7,
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0xEA, 0xEB, 0xE8, 0xEF, 0xEE, 0xEC, 0xC4, 0xC5,
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0xC9, 0xE6, 0xC6, 0xF4, 0xF6, 0xF2, 0xFB, 0xF9,
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0xFF, 0xD6, 0xDC, 0xA2, 0xA3, 0xA5, 0x20A7, 0x192,
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0xE1, 0xED, 0xF3, 0xFA, 0xF1, 0xD1, 0xAA, 0xBA,
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0xBF, 0x2310, 0xAC, 0xBD, 0xBC, 0xA1, 0xAB, 0xBB,
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0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556,
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0x2555, 0x2563, 0x2551, 0x2557, 0x255D, 0x255C, 0x255B, 0x2510,
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0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0x255E, 0x255F,
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0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0x2567,
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0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256B,
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0x256A, 0x2518, 0x250C, 0x2588, 0x2584, 0x258C, 0x2590, 0x2580,
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0x3B1, 0x3B2, 0x393, 0x3C0, 0x3A3, 0x3C3, 0x3BC, 0x3C4,
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0x3A6, 0x398, 0x3A9, 0x3B4, 0x221E, 0x3C6, 0x3B5, 0x2229,
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0x2261, 0xB1, 0x2265, 0x2264, 0x2320, 0x2321, 0xF7, 0x2248,
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0xB0, 0x2219, 0xB7, 0x221A, 0x207F, 0xB2, 0x25A0, 0xA0
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]));
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// CP850
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this.learnEncoding('cp850', this.extendASCII([
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0xC7, 0xFC, 0xE9, 0xE2, 0xE4, 0xE0, 0xE5, 0xE7,
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0xEA, 0xEB, 0xE8, 0xEF, 0xEE, 0xEC, 0xC4, 0xC5,
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0xC9, 0xE6, 0xC6, 0xF4, 0xF6, 0xF2, 0xFB, 0xF9,
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0xFF, 0xD6, 0xDC, 0xF8, 0xA3, 0xD8, 0xD7, 0x192,
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0xE1, 0xED, 0xF3, 0xFA, 0xF1, 0xD1, 0xAA, 0xBA,
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0xBF, 0xAE, 0xAC, 0xBD, 0xBC, 0xA1, 0xAB, 0xBB,
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0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0xC1, 0xC2, 0xC0,
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0xA9, 0x2563, 0x2551, 0x2557, 0x255D, 0xA2, 0xA5, 0x2510,
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0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0xE3, 0xC3,
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0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0xA4,
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0xF0, 0xD0, 0xCA, 0xCB, 0xC8, 0x131, 0xCD, 0xCE,
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0xCF, 0x2518, 0x250C, 0x2588, 0x2584, 0xA6, 0xCC, 0x2580,
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0xD3, 0xDF, 0xD4, 0xD2, 0xF5, 0xD5, 0xB5, 0xFE,
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0xDE, 0xDA, 0xDB, 0xD9, 0xFD, 0xDD, 0xAF, 0xB4,
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0xAD, 0xB1, 0x2017, 0xBE, 0xB6, 0xA7, 0xF7, 0xB8,
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0xB0, 0xA8, 0xB7, 0xB9, 0xB3, 0xB2, 0x25A0, 0xA0
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]));
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// CP858
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this.learnEncoding('cp858', this.extendASCII([
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0xC7, 0xFC, 0xE9, 0xE2, 0xE4, 0xE0, 0xE5, 0xE7,
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0xEA, 0xEB, 0xE8, 0xEF, 0xEE, 0xEC, 0xC4, 0xC5,
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0xC9, 0xE6, 0xC6, 0xF4, 0xF6, 0xF2, 0xFB, 0xF9,
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0xFF, 0xD6, 0xDC, 0xF8, 0xA3, 0xD8, 0xD7, 0x192,
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0xE1, 0xED, 0xF3, 0xFA, 0xF1, 0xD1, 0xAA, 0xBA,
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0xBF, 0xAE, 0xAC, 0xBD, 0xBC, 0xA1, 0xAB, 0xBB,
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0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0xC1, 0xC2, 0xC0,
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0xA9, 0x2563, 0x2551, 0x2557, 0x255D, 0xA2, 0xA5, 0x2510,
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0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0xE3, 0xC3,
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0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0xA4,
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0xF0, 0xD0, 0xCA, 0xCB, 0xC8, 0x20AC, 0xCD, 0xCE,
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0xCF, 0x2518, 0x250C, 0x2588, 0x2584, 0xA6, 0xCC, 0x2580,
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0xD3, 0xDF, 0xD4, 0xD2, 0xF5, 0xD5, 0xB5, 0xFE,
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0xDE, 0xDA, 0xDB, 0xD9, 0xFD, 0xDD, 0xAF, 0xB4,
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0xAD, 0xB1, 0x2017, 0xBE, 0xB6, 0xA7, 0xF7, 0xB8,
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0xB0, 0xA8, 0xB7, 0xB9, 0xB3, 0xB2, 0x25A0, 0xA0
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]));
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// CP808
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this.learnEncoding('cp808', this.extendASCII([
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0x410, 0x411, 0x412, 0x413, 0x414, 0x415, 0x416, 0x417,
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0x418, 0x419, 0x41A, 0x41B, 0x41C, 0x41D, 0x41E, 0x41F,
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0x420, 0x421, 0x422, 0x423, 0x424, 0x425, 0x426, 0x427,
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0x428, 0x429, 0x42A, 0x42B, 0x42C, 0x42D, 0x42E, 0x42F,
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0x430, 0x431, 0x432, 0x433, 0x434, 0x435, 0x436, 0x437,
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0x438, 0x439, 0x43A, 0x43B, 0x43C, 0x43D, 0x43E, 0x43F,
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0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556,
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0x2555, 0x2563, 0x2551, 0x2557, 0x255D, 0x255C, 0x255B, 0x2510,
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0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0x255E, 0x255F,
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0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0x2567,
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0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256B,
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0x256A, 0x2518, 0x250C, 0x2588, 0x2584, 0x258C, 0x2590, 0x2580,
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0x440, 0x441, 0x442, 0x443, 0x444, 0x445, 0x446, 0x447,
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0x448, 0x449, 0x44A, 0x44B, 0x44C, 0x44D, 0x44E, 0x44F,
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0x401, 0x451, 0x404, 0x454, 0x407, 0x457, 0x40E, 0x45E,
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0xB0, 0x2219, 0xB7, 0x221A, 0x2116, 0x20AC, 0x25A0, 0xA0
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]));
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// CP866
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this.learnEncoding('cp866', this.extendASCII([
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0x410, 0x411, 0x412, 0x413, 0x414, 0x415, 0x416, 0x417,
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0x418, 0x419, 0x41A, 0x41B, 0x41C, 0x41D, 0x41E, 0x41F,
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0x420, 0x421, 0x422, 0x423, 0x424, 0x425, 0x426, 0x427,
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0x428, 0x429, 0x42A, 0x42B, 0x42C, 0x42D, 0x42E, 0x42F,
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0x430, 0x431, 0x432, 0x433, 0x434, 0x435, 0x436, 0x437,
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0x438, 0x439, 0x43A, 0x43B, 0x43C, 0x43D, 0x43E, 0x43F,
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0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556,
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0x2555, 0x2563, 0x2551, 0x2557, 0x255D, 0x255C, 0x255B, 0x2510,
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0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0x255E, 0x255F,
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0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0x2567,
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0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256B,
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0x256A, 0x2518, 0x250C, 0x2588, 0x2584, 0x258C, 0x2590, 0x2580,
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0x440, 0x441, 0x442, 0x443, 0x444, 0x445, 0x446, 0x447,
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0x448, 0x449, 0x44A, 0x44B, 0x44C, 0x44D, 0x44E, 0x44F,
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0x401, 0x451, 0x404, 0x454, 0x407, 0x457, 0x40E, 0x45E,
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0xB0, 0x2219, 0xB7, 0x221A, 0x2116, 0xA4, 0x25A0, 0xA0
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]));
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// CP1125
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this.learnEncoding('cp1125', this.extendASCII([
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0x410, 0x411, 0x412, 0x413, 0x414, 0x415, 0x416, 0x417,
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0x418, 0x419, 0x41A, 0x41B, 0x41C, 0x41D, 0x41E, 0x41F,
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0x420, 0x421, 0x422, 0x423, 0x424, 0x425, 0x426, 0x427,
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0x428, 0x429, 0x42A, 0x42B, 0x42C, 0x42D, 0x42E, 0x42F,
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0x430, 0x431, 0x432, 0x433, 0x434, 0x435, 0x436, 0x437,
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0x438, 0x439, 0x43A, 0x43B, 0x43C, 0x43D, 0x43E, 0x43F,
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0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556,
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0x2555, 0x2563, 0x2551, 0x2557, 0x255D, 0x255C, 0x255B, 0x2510,
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0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0x255E, 0x255F,
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0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0x2567,
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0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256B,
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0x256A, 0x2518, 0x250C, 0x2588, 0x2584, 0x258C, 0x2590, 0x2580,
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0x440, 0x441, 0x442, 0x443, 0x444, 0x445, 0x446, 0x447,
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0x448, 0x449, 0x44A, 0x44B, 0x44C, 0x44D, 0x44E, 0x44F,
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0x401, 0x451, 0x490, 0x491, 0x404, 0x454, 0x406, 0x456,
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0x407, 0x457, 0xB7, 0x221A, 0x2116, 0xA4, 0x25A0, 0xA0
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]));
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// KOI8-R
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this.learnEncoding('koi8-r', this.extendASCII([
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0x2500, 0x2502, 0x250C, 0x2510, 0x2514, 0x2518, 0x251C, 0x2524,
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0x252C, 0x2534, 0x253C, 0x2580, 0x2584, 0x2588, 0x258C, 0x2590,
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0x2591, 0x2592, 0x2593, 0x2320, 0x25A0, 0x2219, 0x221A, 0x2248,
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0x2264, 0x2265, 0xA0, 0x2321, 0xB0, 0xB2, 0xB7, 0xF7,
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0x2550, 0x2551, 0x2552, 0x451, 0x2553, 0x2554, 0x2555, 0x2556,
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0x2557, 0x2558, 0x2559, 0x255A, 0x255B, 0x255C, 0x255D, 0x255E,
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0x255F, 0x2560, 0x2561, 0x401, 0x2562, 0x2563, 0x2564, 0x2565,
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0x2566, 0x2567, 0x2568, 0x2569, 0x256A, 0x256B, 0x256C, 0xA9,
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0x44E, 0x430, 0x431, 0x446, 0x434, 0x435, 0x444, 0x433,
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0x445, 0x438, 0x439, 0x43A, 0x43B, 0x43C, 0x43D, 0x043E,
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0x43F, 0x44F, 0x440, 0x441, 0x442, 0x443, 0x436, 0x432,
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0x44C, 0x44B, 0x437, 0x448, 0x44D, 0x449, 0x447, 0x44A,
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0x42E, 0x410, 0x411, 0x426, 0x414, 0x415, 0x424, 0x413,
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0x425, 0x418, 0x419, 0x41A, 0x41B, 0x41C, 0x41D, 0x41E,
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0x41F, 0x42F, 0x420, 0x421, 0x422, 0x423, 0x416, 0x412,
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0x42C, 0x42B, 0x417, 0x428, 0x42D, 0x429, 0x427, 0x42A
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]));
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// KOI8-U
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this.learnEncoding('koi8-u', this.extendASCII([
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0x2500, 0x2502, 0x250C, 0x2510, 0x2514, 0x2518, 0x251C, 0x2524,
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0x252C, 0x2534, 0x253C, 0x2580, 0x2584, 0x2588, 0x258C, 0x2590,
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0x2591, 0x2592, 0x2593, 0x2320, 0x25A0, 0x2219, 0x221A, 0x2248,
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0x2264, 0x2265, 0xA0, 0x2321, 0xB0, 0xB2, 0xB7, 0xF7,
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0x2550, 0x2551, 0x2552, 0x451, 0x454, 0x2554, 0x456, 0x457,
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0x2557, 0x2558, 0x2559, 0x255A, 0x255B, 0x491, 0x255D, 0x255E,
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0x255F, 0x2560, 0x2561, 0x401, 0x404, 0x2563, 0x406, 0x407,
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0x2566, 0x2567, 0x2568, 0x2569, 0x256A, 0x490, 0x256C, 0xA9,
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0x44E, 0x430, 0x431, 0x446, 0x434, 0x435, 0x444, 0x433,
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0x445, 0x438, 0x439, 0x43A, 0x43B, 0x43C, 0x43D, 0x043E,
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0x43F, 0x44F, 0x440, 0x441, 0x442, 0x443, 0x436, 0x432,
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0x44C, 0x44B, 0x437, 0x448, 0x44D, 0x449, 0x447, 0x44A,
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0x42E, 0x410, 0x411, 0x426, 0x414, 0x415, 0x424, 0x413,
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0x425, 0x418, 0x419, 0x41A, 0x41B, 0x41C, 0x41D, 0x41E,
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0x41F, 0x42F, 0x420, 0x421, 0x422, 0x423, 0x416, 0x412,
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0x42C, 0x42B, 0x417, 0x428, 0x42D, 0x429, 0x427, 0x42A
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]));
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// KOI8-RU
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this.learnEncoding('koi8-ru', this.extendASCII([
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0x2500, 0x2502, 0x250C, 0x2510, 0x2514, 0x2518, 0x251C, 0x2524,
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0x252C, 0x2534, 0x253C, 0x2580, 0x2584, 0x2588, 0x258C, 0x2590,
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0x2591, 0x2592, 0x2593, 0x2320, 0x25A0, 0x2219, 0x221A, 0x2248,
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0x2264, 0x2265, 0xA0, 0x2321, 0xB0, 0xB2, 0xB7, 0xF7,
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0x2550, 0x2551, 0x2552, 0x451, 0x454, 0x2554, 0x456, 0x457,
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0x2557, 0x2558, 0x2559, 0x255A, 0x255B, 0x491, 0x45E, 0x255E,
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0x255F, 0x2560, 0x2561, 0x401, 0x404, 0x2563, 0x406, 0x407,
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0x2566, 0x2567, 0x2568, 0x2569, 0x256A, 0x490, 0x40E, 0xA9,
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0x44E, 0x430, 0x431, 0x446, 0x434, 0x435, 0x444, 0x433,
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0x445, 0x438, 0x439, 0x43A, 0x43B, 0x43C, 0x43D, 0x043E,
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0x43F, 0x44F, 0x440, 0x441, 0x442, 0x443, 0x436, 0x432,
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0x44C, 0x44B, 0x437, 0x448, 0x44D, 0x449, 0x447, 0x44A,
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0x42E, 0x410, 0x411, 0x426, 0x414, 0x415, 0x424, 0x413,
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0x425, 0x418, 0x419, 0x41A, 0x41B, 0x41C, 0x41D, 0x41E,
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0x41F, 0x42F, 0x420, 0x421, 0x422, 0x423, 0x416, 0x412,
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0x42C, 0x42B, 0x417, 0x428, 0x42D, 0x429, 0x427, 0x42A
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]));
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// LATIN-1 aka ISO 8859-1 (Western European)
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this.learnEncoding('latin-1', this.extendASCII([
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0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
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0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F,
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0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
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0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F,
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0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7,
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0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF,
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0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7,
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0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF,
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0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
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0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF,
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0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7,
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0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
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0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
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0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
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0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
|
|
0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF
|
|
]));
|
|
|
|
// Windows-1252
|
|
this.learnEncoding('cp1252', this.extendASCII([
|
|
0x20AC, 0x81, 0x201A, 0x192, 0x201E, 0x2026, 0x2020, 0x2021,
|
|
0x2C6, 0x2030, 0x160, 0x2039, 0x152, 0x8D, 0x017D, 0x8F,
|
|
0x90, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014,
|
|
0x02DC, 0x2122, 0x161, 0x203A, 0x0153, 0x9D, 0x17E, 0x178,
|
|
0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7,
|
|
0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF,
|
|
0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7,
|
|
0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF,
|
|
0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
|
|
0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF,
|
|
0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7,
|
|
0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
|
|
0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
|
|
0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
|
|
0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
|
|
0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF
|
|
]));
|
|
};
|
|
|
|
singlebyte.prototype.isEncoding = function(encodingName){
|
|
if( Buffer.isEncoding(encodingName) ) return true;
|
|
for( var i = 0; i < this.encodings.length; i++ ){
|
|
if( this.encodings[i].name === encodingName ) return true;
|
|
}
|
|
return false;
|
|
};
|
|
|
|
singlebyte.prototype.learnEncoding = function(encodingName, encodingTable){
|
|
/*jshint bitwise: false */
|
|
if( Buffer.isEncoding(encodingName) ){
|
|
throw new Error(this.errors.BUFFER_ENCODING);
|
|
}
|
|
|
|
if( encodingTable.length !== 256 ){
|
|
throw new Error(this.errors.INVALID_TABLE_LENGTH);
|
|
}
|
|
|
|
var _this = this;
|
|
encodingTable = encodingTable.map(function(item){
|
|
var nextCode = item |0;
|
|
if( 0 > nextCode || nextCode > 0x10FFFF ){
|
|
throw new Error(_this.errors.OUT_OF_UNICODE);
|
|
}
|
|
return item;
|
|
});
|
|
|
|
if( this.isEncoding(encodingName) ){
|
|
for( var i = 0; i < this.encodings.length; i++ ){
|
|
if( this.encodings[i].name === encodingName ){
|
|
this.encodings[i].table = encodingTable;
|
|
return;
|
|
}
|
|
}
|
|
} else {
|
|
this.encodings.push({
|
|
name: encodingName,
|
|
table: encodingTable
|
|
});
|
|
}
|
|
};
|
|
|
|
singlebyte.prototype.getEncodingTable = function(encodingName){
|
|
for( var i = 0; i < this.encodings.length; i++ ){
|
|
if( this.encodings[i].name === encodingName ){
|
|
return this.encodings[i].table;
|
|
}
|
|
}
|
|
return null;
|
|
};
|
|
|
|
singlebyte.prototype.extendASCII = function(extensionTable){
|
|
if( extensionTable.length !== 128 ){
|
|
throw new Error(this.errors.INVALID_EXTENSION);
|
|
}
|
|
|
|
var output = [];
|
|
for( var i = 0; i < 128; i++ ) output.push(i);
|
|
return output.concat(extensionTable);
|
|
};
|
|
|
|
singlebyte.prototype.bufToStr = function(buf, encoding, start, end){
|
|
/* jshint bitwise: false */
|
|
if(!( Buffer.isBuffer(buf) )){
|
|
throw new Error(this.errors.NOT_A_BUFFER);
|
|
}
|
|
if( Buffer.isEncoding(encoding) ){
|
|
return buf.toString(encoding, start, end);
|
|
}
|
|
var table = this.getEncodingTable(encoding);
|
|
if( table === null ) throw new Error(this.errors.UNKNOWN_ENCODING);
|
|
|
|
if( typeof end === 'undefined' ) end = buf.length;
|
|
if( typeof start === 'undefined' ) start = 0;
|
|
|
|
var output = '';
|
|
var sourceValue;
|
|
for( var i = start; i < end; i++ ){
|
|
sourceValue = table[ buf[i] ];
|
|
if( sourceValue <= 0xFFFF ){
|
|
output += String.fromCharCode(sourceValue);
|
|
} else if( 0x10000 <= sourceValue && sourceValue <= 0x10FFFF ){
|
|
sourceValue -= 0x10000;
|
|
output += String.fromCharCode( 0xD800 + (sourceValue >> 10) );
|
|
output += String.fromCharCode( 0xDC00 + (sourceValue & 0x3FF) );
|
|
} else throw new Error(this.errors.OUT_OF_UNICODE);
|
|
}
|
|
return output;
|
|
};
|
|
|
|
var strToBufDefaults = {
|
|
defaultCode: 0x3F // '?'
|
|
};
|
|
|
|
singlebyte.prototype.strToBuf = function(str, encoding, encodingOptions){
|
|
if( Buffer.isEncoding(encoding) ){
|
|
return new Buffer(str, encoding);
|
|
}
|
|
str = '' + str;
|
|
var options = extend({}, strToBufDefaults, encodingOptions);
|
|
var table = this.getEncodingTable(encoding);
|
|
if( table === null ) throw new Error(this.errors.UNKNOWN_ENCODING);
|
|
var output = [];
|
|
for( var i = 0; i < str.length; i++ ){
|
|
var charUnicode;
|
|
var thisCharCode = str.charCodeAt(i);
|
|
if( 0xD800 <= thisCharCode && thisCharCode <= 0xDBFF &&
|
|
i+1 < str.length
|
|
){
|
|
var nextCharCode = str.charCodeAt(i+1);
|
|
if( 0xDC00 <= nextCharCode && nextCharCode <= 0xDFFF ){
|
|
charUnicode = 0x10000 + (thisCharCode - 0xD800)*0x400 +
|
|
(nextCharCode - 0xDC00);
|
|
i++;
|
|
} else {
|
|
charUnicode = thisCharCode;
|
|
}
|
|
} else {
|
|
charUnicode = thisCharCode;
|
|
}
|
|
|
|
var codeFoundIndex = table.indexOf(charUnicode);
|
|
if( codeFoundIndex < 0 ){
|
|
output.push(options.defaultCode);
|
|
} else {
|
|
output.push(codeFoundIndex);
|
|
}
|
|
}
|
|
return new Buffer(output);
|
|
};
|
|
|
|
singlebyte.prototype.errors = {
|
|
NOT_A_BUFFER : 'The given source is not a buffer!',
|
|
UNKNOWN_ENCODING : 'The given encoding is not defined!',
|
|
INVALID_TABLE_LENGTH : 'The encoding table must have 256 elements!',
|
|
INVALID_EXTENSION : 'The ASCII extension table must have 128 elements!',
|
|
BUFFER_ENCODING : "Cannot redefine a Node's encoding!",
|
|
OUT_OF_UNICODE : "An encoding table's element is greater than 0x10FFFF!"
|
|
};
|
|
|
|
module.exports = singlebyte();
|