summaryrefslogtreecommitdiffstats
path: root/node_modules/pako/lib/zlib/adler32.js
diff options
context:
space:
mode:
authorGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
committerGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
commite06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch)
tree55713f725f77b44ebfec86e4eec3ce33e71458ca /node_modules/pako/lib/zlib/adler32.js
downloadwebsite_creator-e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d.tar.gz
website_creator-e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d.tar.bz2
website_creator-e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d.zip
api, login, auth
Diffstat (limited to 'node_modules/pako/lib/zlib/adler32.js')
-rw-r--r--node_modules/pako/lib/zlib/adler32.js51
1 files changed, 51 insertions, 0 deletions
diff --git a/node_modules/pako/lib/zlib/adler32.js b/node_modules/pako/lib/zlib/adler32.js
new file mode 100644
index 0000000..d440a98
--- /dev/null
+++ b/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;