diff options
Diffstat (limited to 'includes/external/school/node_modules/pako/lib/zlib/adler32.js')
-rw-r--r-- | includes/external/school/node_modules/pako/lib/zlib/adler32.js | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/includes/external/school/node_modules/pako/lib/zlib/adler32.js b/includes/external/school/node_modules/pako/lib/zlib/adler32.js new file mode 100644 index 0000000..d440a98 --- /dev/null +++ b/includes/external/school/node_modules/pako/lib/zlib/adler32.js @@ -0,0 +1,51 @@ +'use strict'; + +// Note: adler32 takes 12% for level 0 and 2% for level 6. +// It isn't worth it to make additional optimizations as in original. +// Small size is preferable. + +// (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. + +function adler32(adler, buf, len, pos) { + var s1 = (adler & 0xffff) |0, + s2 = ((adler >>> 16) & 0xffff) |0, + n = 0; + + while (len !== 0) { + // Set limit ~ twice less than 5552, to keep + // s2 in 31-bits, because we force signed ints. + // in other case %= will fail. + n = len > 2000 ? 2000 : len; + len -= n; + + do { + s1 = (s1 + buf[pos++]) |0; + s2 = (s2 + s1) |0; + } while (--n); + + s1 %= 65521; + s2 %= 65521; + } + + return (s1 | (s2 << 16)) |0; +} + + +module.exports = adler32; |