package/package.json000644 000765 000024 0000000544 12635153466013033 0ustar00000000 000000 { "name": "is-utf8", "version": "0.2.1", "description": "Detect if a buffer is utf8 encoded.", "main": "is-utf8.js", "scripts": { "test": "node test.js" }, "repository": "https://github.com/wayfind/is-utf8.git", "keywords": [ "utf8", "charset" ], "files": [ "is-utf8.js" ], "author": "wayfind", "license": "MIT" } package/README.md000644 000765 000024 0000000615 12635153066012017 0ustar00000000 000000 #utf8 detector Detect if a Buffer is utf8 encoded. It need The minimum amount of bytes is 4. ```javascript var fs = require('fs'); var isUtf8 = require('is-utf8'); var ansi = fs.readFileSync('ansi.txt'); var utf8 = fs.readFileSync('utf8.txt'); console.log('ansi.txt is utf8: '+isUtf8(ansi)); //false console.log('utf8.txt is utf8: '+isUtf8(utf8)); //true ``` package/LICENSE000644 000765 000024 0000002073 12635151164011542 0ustar00000000 000000 The MIT License (MIT) Copyright (C) 2014 Wei Fanzhe 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. package/is-utf8.js000644 000765 000024 0000004714 12024352442012370 0ustar00000000 000000 exports = module.exports = function(bytes) { var i = 0; while(i < bytes.length) { if( (// ASCII bytes[i] == 0x09 || bytes[i] == 0x0A || bytes[i] == 0x0D || (0x20 <= bytes[i] && bytes[i] <= 0x7E) ) ) { i += 1; continue; } if( (// non-overlong 2-byte (0xC2 <= bytes[i] && bytes[i] <= 0xDF) && (0x80 <= bytes[i+1] && bytes[i+1] <= 0xBF) ) ) { i += 2; continue; } if( (// excluding overlongs bytes[i] == 0xE0 && (0xA0 <= bytes[i + 1] && bytes[i + 1] <= 0xBF) && (0x80 <= bytes[i + 2] && bytes[i + 2] <= 0xBF) ) || (// straight 3-byte ((0xE1 <= bytes[i] && bytes[i] <= 0xEC) || bytes[i] == 0xEE || bytes[i] == 0xEF) && (0x80 <= bytes[i + 1] && bytes[i+1] <= 0xBF) && (0x80 <= bytes[i+2] && bytes[i+2] <= 0xBF) ) || (// excluding surrogates bytes[i] == 0xED && (0x80 <= bytes[i+1] && bytes[i+1] <= 0x9F) && (0x80 <= bytes[i+2] && bytes[i+2] <= 0xBF) ) ) { i += 3; continue; } if( (// planes 1-3 bytes[i] == 0xF0 && (0x90 <= bytes[i + 1] && bytes[i + 1] <= 0xBF) && (0x80 <= bytes[i + 2] && bytes[i + 2] <= 0xBF) && (0x80 <= bytes[i + 3] && bytes[i + 3] <= 0xBF) ) || (// planes 4-15 (0xF1 <= bytes[i] && bytes[i] <= 0xF3) && (0x80 <= bytes[i + 1] && bytes[i + 1] <= 0xBF) && (0x80 <= bytes[i + 2] && bytes[i + 2] <= 0xBF) && (0x80 <= bytes[i + 3] && bytes[i + 3] <= 0xBF) ) || (// plane 16 bytes[i] == 0xF4 && (0x80 <= bytes[i + 1] && bytes[i + 1] <= 0x8F) && (0x80 <= bytes[i + 2] && bytes[i + 2] <= 0xBF) && (0x80 <= bytes[i + 3] && bytes[i + 3] <= 0xBF) ) ) { i += 4; continue; } return false; } return true; }