From 8b886e753967efaceda3f5fc04d9d3f2fe306c7b Mon Sep 17 00:00:00 2001 From: Christopher Jeffrey Date: Mon, 20 Apr 2015 14:09:01 -0700 Subject: [PATCH] convert ibm to utf8. see #127. --- example/ansi-viewer/index.js | 45 +++- example/ansi-viewer/singlebyte.js | 406 ++++++++++++++++++++++++++++++ 2 files changed, 441 insertions(+), 10 deletions(-) create mode 100644 example/ansi-viewer/singlebyte.js diff --git a/example/ansi-viewer/index.js b/example/ansi-viewer/index.js index 70f7697..0dbaba4 100644 --- a/example/ansi-viewer/index.js +++ b/example/ansi-viewer/index.js @@ -8,7 +8,8 @@ var blessed = require('blessed') , request = require('request') , fs = require('fs') - , screen; + , cp = require('child_process') + , singlebyte = require('./singlebyte'); // $ wget -r -o log --tries=10 'http://artscene.textfiles.com/ansi/' // $ grep 'http.*\.ans$' log | awk '{ print $3 }' > ansi-art.list @@ -24,7 +25,7 @@ var max = Object.keys(map).reduce(function(out, text) { return Math.max(out, text.length); }, 0) + 6; -screen = blessed.screen({ +var screen = blessed.screen({ smartCSR: true, dockBorders: true }); @@ -140,7 +141,10 @@ list.on('select', function(url, selected) { list._.rendering = true; loader.load('Loading...'); - request(url, function(err, res, body) { + request({ + uri: url, + encoding: null + }, function(err, res, body) { list._.rendering = false; loader.stop(); @@ -152,15 +156,21 @@ list.on('select', function(url, selected) { return msg.error('No body.'); } - // Remove MCI codes: - body = body.replace(/%[A-Z0-9]{2}/g, ''); + return cp437ToUtf8(body, function(err, body) { + if (err) { + return msg.error(err.message); + } - // Reset and write the art: - art.term.reset(); - art.term.write(body); - art.term.cursorHidden = true; + // Remove MCI codes: + //body = body.replace(/%[A-Z0-9]{2}/g, ''); - screen.render(); + // Reset and write the art: + art.term.reset(); + art.term.write(body); + art.term.cursorHidden = true; + + screen.render(); + }); }); }); @@ -176,3 +186,18 @@ screen.key('h', function() { }); screen.render(); + +/** + * Helpers + */ + +// https://github.com/chjj/blessed/issues/127 +// https://github.com/Mithgol/node-singlebyte + +function cp437ToUtf8(buf, callback) { + try { + return callback(null, singlebyte.bufToStr(buf, 'cp437')); + } catch (e) { + return callback(e); + } +} diff --git a/example/ansi-viewer/singlebyte.js b/example/ansi-viewer/singlebyte.js new file mode 100644 index 0000000..7ed6b4f --- /dev/null +++ b/example/ansi-viewer/singlebyte.js @@ -0,0 +1,406 @@ +/** + * node-singlebyte + */ + +// The MIT License (MIT) +// +// Copyright (c) 2013, Sergey Sokoloff (aka Mithgol the Webmaster). +// https://github.com/Mithgol/node-singlebyte +// +// Permission is hereby granted, free of charge, to any person obtaining a copy of +// this software and associated documentation files (the "Software"), to deal in +// the Software without restriction, including without limitation the rights to +// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of +// the Software, and to permit persons to whom the Software is furnished to do so, +// subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in all +// copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS +// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR +// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER +// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +var extend = function(target) { + target = target || {}; + Array.prototype.slice.call(arguments, 1).forEach(function(obj) { + Object.keys(obj || {}).forEach(function(key) { + target[key] = obj[key]; + }); + }); + return target; +}; + +var singlebyte = function(){ + /* jshint indent: false */ + if(!( this instanceof singlebyte )){ + return new singlebyte(); + } + + this.encodings = []; + + // CP437 + this.learnEncoding('cp437', this.extendASCII([ + 0xC7, 0xFC, 0xE9, 0xE2, 0xE4, 0xE0, 0xE5, 0xE7, + 0xEA, 0xEB, 0xE8, 0xEF, 0xEE, 0xEC, 0xC4, 0xC5, + 0xC9, 0xE6, 0xC6, 0xF4, 0xF6, 0xF2, 0xFB, 0xF9, + 0xFF, 0xD6, 0xDC, 0xA2, 0xA3, 0xA5, 0x20A7, 0x192, + 0xE1, 0xED, 0xF3, 0xFA, 0xF1, 0xD1, 0xAA, 0xBA, + 0xBF, 0x2310, 0xAC, 0xBD, 0xBC, 0xA1, 0xAB, 0xBB, + 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556, + 0x2555, 0x2563, 0x2551, 0x2557, 0x255D, 0x255C, 0x255B, 0x2510, + 0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0x255E, 0x255F, + 0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0x2567, + 0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256B, + 0x256A, 0x2518, 0x250C, 0x2588, 0x2584, 0x258C, 0x2590, 0x2580, + 0x3B1, 0x3B2, 0x393, 0x3C0, 0x3A3, 0x3C3, 0x3BC, 0x3C4, + 0x3A6, 0x398, 0x3A9, 0x3B4, 0x221E, 0x3C6, 0x3B5, 0x2229, + 0x2261, 0xB1, 0x2265, 0x2264, 0x2320, 0x2321, 0xF7, 0x2248, + 0xB0, 0x2219, 0xB7, 0x221A, 0x207F, 0xB2, 0x25A0, 0xA0 + ])); + + // CP850 + this.learnEncoding('cp850', this.extendASCII([ + 0xC7, 0xFC, 0xE9, 0xE2, 0xE4, 0xE0, 0xE5, 0xE7, + 0xEA, 0xEB, 0xE8, 0xEF, 0xEE, 0xEC, 0xC4, 0xC5, + 0xC9, 0xE6, 0xC6, 0xF4, 0xF6, 0xF2, 0xFB, 0xF9, + 0xFF, 0xD6, 0xDC, 0xF8, 0xA3, 0xD8, 0xD7, 0x192, + 0xE1, 0xED, 0xF3, 0xFA, 0xF1, 0xD1, 0xAA, 0xBA, + 0xBF, 0xAE, 0xAC, 0xBD, 0xBC, 0xA1, 0xAB, 0xBB, + 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0xC1, 0xC2, 0xC0, + 0xA9, 0x2563, 0x2551, 0x2557, 0x255D, 0xA2, 0xA5, 0x2510, + 0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0xE3, 0xC3, + 0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0xA4, + 0xF0, 0xD0, 0xCA, 0xCB, 0xC8, 0x131, 0xCD, 0xCE, + 0xCF, 0x2518, 0x250C, 0x2588, 0x2584, 0xA6, 0xCC, 0x2580, + 0xD3, 0xDF, 0xD4, 0xD2, 0xF5, 0xD5, 0xB5, 0xFE, + 0xDE, 0xDA, 0xDB, 0xD9, 0xFD, 0xDD, 0xAF, 0xB4, + 0xAD, 0xB1, 0x2017, 0xBE, 0xB6, 0xA7, 0xF7, 0xB8, + 0xB0, 0xA8, 0xB7, 0xB9, 0xB3, 0xB2, 0x25A0, 0xA0 + ])); + + // CP858 + this.learnEncoding('cp858', this.extendASCII([ + 0xC7, 0xFC, 0xE9, 0xE2, 0xE4, 0xE0, 0xE5, 0xE7, + 0xEA, 0xEB, 0xE8, 0xEF, 0xEE, 0xEC, 0xC4, 0xC5, + 0xC9, 0xE6, 0xC6, 0xF4, 0xF6, 0xF2, 0xFB, 0xF9, + 0xFF, 0xD6, 0xDC, 0xF8, 0xA3, 0xD8, 0xD7, 0x192, + 0xE1, 0xED, 0xF3, 0xFA, 0xF1, 0xD1, 0xAA, 0xBA, + 0xBF, 0xAE, 0xAC, 0xBD, 0xBC, 0xA1, 0xAB, 0xBB, + 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0xC1, 0xC2, 0xC0, + 0xA9, 0x2563, 0x2551, 0x2557, 0x255D, 0xA2, 0xA5, 0x2510, + 0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0xE3, 0xC3, + 0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0xA4, + 0xF0, 0xD0, 0xCA, 0xCB, 0xC8, 0x20AC, 0xCD, 0xCE, + 0xCF, 0x2518, 0x250C, 0x2588, 0x2584, 0xA6, 0xCC, 0x2580, + 0xD3, 0xDF, 0xD4, 0xD2, 0xF5, 0xD5, 0xB5, 0xFE, + 0xDE, 0xDA, 0xDB, 0xD9, 0xFD, 0xDD, 0xAF, 0xB4, + 0xAD, 0xB1, 0x2017, 0xBE, 0xB6, 0xA7, 0xF7, 0xB8, + 0xB0, 0xA8, 0xB7, 0xB9, 0xB3, 0xB2, 0x25A0, 0xA0 + ])); + + // CP808 + this.learnEncoding('cp808', this.extendASCII([ + 0x410, 0x411, 0x412, 0x413, 0x414, 0x415, 0x416, 0x417, + 0x418, 0x419, 0x41A, 0x41B, 0x41C, 0x41D, 0x41E, 0x41F, + 0x420, 0x421, 0x422, 0x423, 0x424, 0x425, 0x426, 0x427, + 0x428, 0x429, 0x42A, 0x42B, 0x42C, 0x42D, 0x42E, 0x42F, + 0x430, 0x431, 0x432, 0x433, 0x434, 0x435, 0x436, 0x437, + 0x438, 0x439, 0x43A, 0x43B, 0x43C, 0x43D, 0x43E, 0x43F, + 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556, + 0x2555, 0x2563, 0x2551, 0x2557, 0x255D, 0x255C, 0x255B, 0x2510, + 0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0x255E, 0x255F, + 0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0x2567, + 0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256B, + 0x256A, 0x2518, 0x250C, 0x2588, 0x2584, 0x258C, 0x2590, 0x2580, + 0x440, 0x441, 0x442, 0x443, 0x444, 0x445, 0x446, 0x447, + 0x448, 0x449, 0x44A, 0x44B, 0x44C, 0x44D, 0x44E, 0x44F, + 0x401, 0x451, 0x404, 0x454, 0x407, 0x457, 0x40E, 0x45E, + 0xB0, 0x2219, 0xB7, 0x221A, 0x2116, 0x20AC, 0x25A0, 0xA0 + ])); + + // CP866 + this.learnEncoding('cp866', this.extendASCII([ + 0x410, 0x411, 0x412, 0x413, 0x414, 0x415, 0x416, 0x417, + 0x418, 0x419, 0x41A, 0x41B, 0x41C, 0x41D, 0x41E, 0x41F, + 0x420, 0x421, 0x422, 0x423, 0x424, 0x425, 0x426, 0x427, + 0x428, 0x429, 0x42A, 0x42B, 0x42C, 0x42D, 0x42E, 0x42F, + 0x430, 0x431, 0x432, 0x433, 0x434, 0x435, 0x436, 0x437, + 0x438, 0x439, 0x43A, 0x43B, 0x43C, 0x43D, 0x43E, 0x43F, + 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556, + 0x2555, 0x2563, 0x2551, 0x2557, 0x255D, 0x255C, 0x255B, 0x2510, + 0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0x255E, 0x255F, + 0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0x2567, + 0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256B, + 0x256A, 0x2518, 0x250C, 0x2588, 0x2584, 0x258C, 0x2590, 0x2580, + 0x440, 0x441, 0x442, 0x443, 0x444, 0x445, 0x446, 0x447, + 0x448, 0x449, 0x44A, 0x44B, 0x44C, 0x44D, 0x44E, 0x44F, + 0x401, 0x451, 0x404, 0x454, 0x407, 0x457, 0x40E, 0x45E, + 0xB0, 0x2219, 0xB7, 0x221A, 0x2116, 0xA4, 0x25A0, 0xA0 + ])); + + // CP1125 + this.learnEncoding('cp1125', this.extendASCII([ + 0x410, 0x411, 0x412, 0x413, 0x414, 0x415, 0x416, 0x417, + 0x418, 0x419, 0x41A, 0x41B, 0x41C, 0x41D, 0x41E, 0x41F, + 0x420, 0x421, 0x422, 0x423, 0x424, 0x425, 0x426, 0x427, + 0x428, 0x429, 0x42A, 0x42B, 0x42C, 0x42D, 0x42E, 0x42F, + 0x430, 0x431, 0x432, 0x433, 0x434, 0x435, 0x436, 0x437, + 0x438, 0x439, 0x43A, 0x43B, 0x43C, 0x43D, 0x43E, 0x43F, + 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556, + 0x2555, 0x2563, 0x2551, 0x2557, 0x255D, 0x255C, 0x255B, 0x2510, + 0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0x255E, 0x255F, + 0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0x2567, + 0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256B, + 0x256A, 0x2518, 0x250C, 0x2588, 0x2584, 0x258C, 0x2590, 0x2580, + 0x440, 0x441, 0x442, 0x443, 0x444, 0x445, 0x446, 0x447, + 0x448, 0x449, 0x44A, 0x44B, 0x44C, 0x44D, 0x44E, 0x44F, + 0x401, 0x451, 0x490, 0x491, 0x404, 0x454, 0x406, 0x456, + 0x407, 0x457, 0xB7, 0x221A, 0x2116, 0xA4, 0x25A0, 0xA0 + ])); + + // KOI8-R + this.learnEncoding('koi8-r', this.extendASCII([ + 0x2500, 0x2502, 0x250C, 0x2510, 0x2514, 0x2518, 0x251C, 0x2524, + 0x252C, 0x2534, 0x253C, 0x2580, 0x2584, 0x2588, 0x258C, 0x2590, + 0x2591, 0x2592, 0x2593, 0x2320, 0x25A0, 0x2219, 0x221A, 0x2248, + 0x2264, 0x2265, 0xA0, 0x2321, 0xB0, 0xB2, 0xB7, 0xF7, + 0x2550, 0x2551, 0x2552, 0x451, 0x2553, 0x2554, 0x2555, 0x2556, + 0x2557, 0x2558, 0x2559, 0x255A, 0x255B, 0x255C, 0x255D, 0x255E, + 0x255F, 0x2560, 0x2561, 0x401, 0x2562, 0x2563, 0x2564, 0x2565, + 0x2566, 0x2567, 0x2568, 0x2569, 0x256A, 0x256B, 0x256C, 0xA9, + 0x44E, 0x430, 0x431, 0x446, 0x434, 0x435, 0x444, 0x433, + 0x445, 0x438, 0x439, 0x43A, 0x43B, 0x43C, 0x43D, 0x043E, + 0x43F, 0x44F, 0x440, 0x441, 0x442, 0x443, 0x436, 0x432, + 0x44C, 0x44B, 0x437, 0x448, 0x44D, 0x449, 0x447, 0x44A, + 0x42E, 0x410, 0x411, 0x426, 0x414, 0x415, 0x424, 0x413, + 0x425, 0x418, 0x419, 0x41A, 0x41B, 0x41C, 0x41D, 0x41E, + 0x41F, 0x42F, 0x420, 0x421, 0x422, 0x423, 0x416, 0x412, + 0x42C, 0x42B, 0x417, 0x428, 0x42D, 0x429, 0x427, 0x42A + ])); + + // KOI8-U + this.learnEncoding('koi8-u', this.extendASCII([ + 0x2500, 0x2502, 0x250C, 0x2510, 0x2514, 0x2518, 0x251C, 0x2524, + 0x252C, 0x2534, 0x253C, 0x2580, 0x2584, 0x2588, 0x258C, 0x2590, + 0x2591, 0x2592, 0x2593, 0x2320, 0x25A0, 0x2219, 0x221A, 0x2248, + 0x2264, 0x2265, 0xA0, 0x2321, 0xB0, 0xB2, 0xB7, 0xF7, + 0x2550, 0x2551, 0x2552, 0x451, 0x454, 0x2554, 0x456, 0x457, + 0x2557, 0x2558, 0x2559, 0x255A, 0x255B, 0x491, 0x255D, 0x255E, + 0x255F, 0x2560, 0x2561, 0x401, 0x404, 0x2563, 0x406, 0x407, + 0x2566, 0x2567, 0x2568, 0x2569, 0x256A, 0x490, 0x256C, 0xA9, + 0x44E, 0x430, 0x431, 0x446, 0x434, 0x435, 0x444, 0x433, + 0x445, 0x438, 0x439, 0x43A, 0x43B, 0x43C, 0x43D, 0x043E, + 0x43F, 0x44F, 0x440, 0x441, 0x442, 0x443, 0x436, 0x432, + 0x44C, 0x44B, 0x437, 0x448, 0x44D, 0x449, 0x447, 0x44A, + 0x42E, 0x410, 0x411, 0x426, 0x414, 0x415, 0x424, 0x413, + 0x425, 0x418, 0x419, 0x41A, 0x41B, 0x41C, 0x41D, 0x41E, + 0x41F, 0x42F, 0x420, 0x421, 0x422, 0x423, 0x416, 0x412, + 0x42C, 0x42B, 0x417, 0x428, 0x42D, 0x429, 0x427, 0x42A + ])); + + // KOI8-RU + this.learnEncoding('koi8-ru', this.extendASCII([ + 0x2500, 0x2502, 0x250C, 0x2510, 0x2514, 0x2518, 0x251C, 0x2524, + 0x252C, 0x2534, 0x253C, 0x2580, 0x2584, 0x2588, 0x258C, 0x2590, + 0x2591, 0x2592, 0x2593, 0x2320, 0x25A0, 0x2219, 0x221A, 0x2248, + 0x2264, 0x2265, 0xA0, 0x2321, 0xB0, 0xB2, 0xB7, 0xF7, + 0x2550, 0x2551, 0x2552, 0x451, 0x454, 0x2554, 0x456, 0x457, + 0x2557, 0x2558, 0x2559, 0x255A, 0x255B, 0x491, 0x45E, 0x255E, + 0x255F, 0x2560, 0x2561, 0x401, 0x404, 0x2563, 0x406, 0x407, + 0x2566, 0x2567, 0x2568, 0x2569, 0x256A, 0x490, 0x40E, 0xA9, + 0x44E, 0x430, 0x431, 0x446, 0x434, 0x435, 0x444, 0x433, + 0x445, 0x438, 0x439, 0x43A, 0x43B, 0x43C, 0x43D, 0x043E, + 0x43F, 0x44F, 0x440, 0x441, 0x442, 0x443, 0x436, 0x432, + 0x44C, 0x44B, 0x437, 0x448, 0x44D, 0x449, 0x447, 0x44A, + 0x42E, 0x410, 0x411, 0x426, 0x414, 0x415, 0x424, 0x413, + 0x425, 0x418, 0x419, 0x41A, 0x41B, 0x41C, 0x41D, 0x41E, + 0x41F, 0x42F, 0x420, 0x421, 0x422, 0x423, 0x416, 0x412, + 0x42C, 0x42B, 0x417, 0x428, 0x42D, 0x429, 0x427, 0x42A + ])); + + // LATIN-1 aka ISO 8859-1 (Western European) + this.learnEncoding('latin-1', this.extendASCII([ + 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, + 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, + 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, + 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, + 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 + ])); + + // 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();