Gecko [ fernandoquevedodop.com ]

Name	Size	Permission
adler32.js	1.62 KB	-rw-r--r--
constants.js	2.26 KB	-rw-r--r--
crc32.js	1.74 KB	-rw-r--r--
deflate.js	59.15 KB	-rw-r--r--
gzheader.js	2.19 KB	-rw-r--r--
inffast.js	12.37 KB	-rw-r--r--
inflate.js	48.96 KB	-rw-r--r--
inftrees.js	12.28 KB	-rw-r--r--
messages.js	1.5 KB	-rw-r--r--
trees.js	39.22 KB	-rw-r--r--
zstream.js	1.77 KB	-rw-r--r--

Code Editor : crc32.js

'use strict';

// Note: we can't get significant speed boost here.
// So write code to minimize size - no pregenerated tables
// and array tools dependencies.

// (C) 1995-2013 Jean-loup Gailly and Mark Adler
// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
//   claim that you wrote the original software. If you use this software
//   in a product, an acknowledgment in the product documentation would be
//   appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
//   misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.

// Use ordinary array, since untyped makes no boost here
const makeTable = () => {
  let c, table = [];

for (var n = 0; n < 256; n++) {
    c = n;
    for (var k = 0; k < 8; k++) {
      c = ((c & 1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));
    }
    table[n] = c;
  }

return table;
};

// Create table on load. Just 255 signed longs. Not a problem.
const crcTable = new Uint32Array(makeTable());

const crc32 = (crc, buf, len, pos) => {
  const t = crcTable;
  const end = pos + len;

crc ^= -1;

for (let i = pos; i < end; i++) {
    crc = (crc >>> 8) ^ t[(crc ^ buf[i]) & 0xFF];
  }

return (crc ^ (-1)); // >>> 0;
};

module.exports = crc32;

${this.title}

Code Editor : crc32.js