vs-code server

node_modules/pako/lib/zlib/crc32.js

@@ -0,0 +1,59 @@
+'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;