You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
116 lines
3.5 KiB
116 lines
3.5 KiB
2 months ago
|
/*! crc32.js (C) 2014-present SheetJS -- http://sheetjs.com */
|
||
|
|
/* vim: set ts=2: */
|
||
|
|
/*exported CRC32C */
|
||
|
|
var CRC32C;
|
||
|
|
(function (factory) {
|
||
|
|
/*jshint ignore:start */
|
||
|
|
/*eslint-disable */
|
||
|
|
if(typeof DO_NOT_EXPORT_CRC === 'undefined') {
|
||
|
|
if('object' === typeof exports) {
|
||
|
|
factory(exports);
|
||
|
|
} else if ('function' === typeof define && define.amd) {
|
||
|
|
define(function () {
|
||
|
|
var module = {};
|
||
|
|
factory(module);
|
||
|
|
return module;
|
||
|
|
});
|
||
|
|
} else {
|
||
|
|
factory(CRC32C = {});
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
factory(CRC32C = {});
|
||
|
|
}
|
||
|
|
/*eslint-enable */
|
||
|
|
/*jshint ignore:end */
|
||
|
|
}(function(CRC32C) {
|
||
|
|
CRC32C.version = '1.2.2';
|
||
|
|
/*global Int32Array */
|
||
|
|
function signed_crc_table() {
|
||
|
|
var c = 0, table = new Array(256);
|
||
|
|
|
||
|
|
for(var n =0; n != 256; ++n){
|
||
|
|
c = n;
|
||
|
|
c = ((c&1) ? (-2097792136 ^ (c >>> 1)) : (c >>> 1));
|
||
|
|
c = ((c&1) ? (-2097792136 ^ (c >>> 1)) : (c >>> 1));
|
||
|
|
c = ((c&1) ? (-2097792136 ^ (c >>> 1)) : (c >>> 1));
|
||
|
|
c = ((c&1) ? (-2097792136 ^ (c >>> 1)) : (c >>> 1));
|
||
|
|
c = ((c&1) ? (-2097792136 ^ (c >>> 1)) : (c >>> 1));
|
||
|
|
c = ((c&1) ? (-2097792136 ^ (c >>> 1)) : (c >>> 1));
|
||
|
|
c = ((c&1) ? (-2097792136 ^ (c >>> 1)) : (c >>> 1));
|
||
|
|
c = ((c&1) ? (-2097792136 ^ (c >>> 1)) : (c >>> 1));
|
||
|
|
table[n] = c;
|
||
|
|
}
|
||
|
|
|
||
|
|
return typeof Int32Array !== 'undefined' ? new Int32Array(table) : table;
|
||
|
|
}
|
||
|
|
|
||
|
|
var T0 = signed_crc_table();
|
||
|
|
function slice_by_16_tables(T) {
|
||
|
|
var c = 0, v = 0, n = 0, table = typeof Int32Array !== 'undefined' ? new Int32Array(4096) : new Array(4096) ;
|
||
|
|
|
||
|
|
for(n = 0; n != 256; ++n) table[n] = T[n];
|
||
|
|
for(n = 0; n != 256; ++n) {
|
||
|
|
v = T[n];
|
||
|
|
for(c = 256 + n; c < 4096; c += 256) v = table[c] = (v >>> 8) ^ T[v & 0xFF];
|
||
|
|
}
|
||
|
|
var out = [];
|
||
|
|
for(n = 1; n != 16; ++n) out[n - 1] = typeof Int32Array !== 'undefined' ? table.subarray(n * 256, n * 256 + 256) : table.slice(n * 256, n * 256 + 256);
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
var TT = slice_by_16_tables(T0);
|
||
|
|
var T1 = TT[0], T2 = TT[1], T3 = TT[2], T4 = TT[3], T5 = TT[4];
|
||
|
|
var T6 = TT[5], T7 = TT[6], T8 = TT[7], T9 = TT[8], Ta = TT[9];
|
||
|
|
var Tb = TT[10], Tc = TT[11], Td = TT[12], Te = TT[13], Tf = TT[14];
|
||
|
|
function crc32_bstr(bstr, seed) {
|
||
|
|
var C = seed ^ -1;
|
||
|
|
for(var i = 0, L = bstr.length; i < L;) C = (C>>>8) ^ T0[(C^bstr.charCodeAt(i++))&0xFF];
|
||
|
|
return ~C;
|
||
|
|
}
|
||
|
|
|
||
|
|
function crc32_buf(B, seed) {
|
||
|
|
var C = seed ^ -1, L = B.length - 15, i = 0;
|
||
|
|
for(; i < L;) C =
|
||
|
|
Tf[B[i++] ^ (C & 255)] ^
|
||
|
|
Te[B[i++] ^ ((C >> 8) & 255)] ^
|
||
|
|
Td[B[i++] ^ ((C >> 16) & 255)] ^
|
||
|
|
Tc[B[i++] ^ (C >>> 24)] ^
|
||
|
|
Tb[B[i++]] ^ Ta[B[i++]] ^ T9[B[i++]] ^ T8[B[i++]] ^
|
||
|
|
T7[B[i++]] ^ T6[B[i++]] ^ T5[B[i++]] ^ T4[B[i++]] ^
|
||
|
|
T3[B[i++]] ^ T2[B[i++]] ^ T1[B[i++]] ^ T0[B[i++]];
|
||
|
|
L += 15;
|
||
|
|
while(i < L) C = (C>>>8) ^ T0[(C^B[i++])&0xFF];
|
||
|
|
return ~C;
|
||
|
|
}
|
||
|
|
|
||
|
|
function crc32_str(str, seed) {
|
||
|
|
var C = seed ^ -1;
|
||
|
|
for(var i = 0, L = str.length, c = 0, d = 0; i < L;) {
|
||
|
|
c = str.charCodeAt(i++);
|
||
|
|
if(c < 0x80) {
|
||
|
|
C = (C>>>8) ^ T0[(C^c)&0xFF];
|
||
|
|
} else if(c < 0x800) {
|
||
|
|
C = (C>>>8) ^ T0[(C ^ (192|((c>>6)&31)))&0xFF];
|
||
|
|
C = (C>>>8) ^ T0[(C ^ (128|(c&63)))&0xFF];
|
||
|
|
} else if(c >= 0xD800 && c < 0xE000) {
|
||
|
|
c = (c&1023)+64; d = str.charCodeAt(i++)&1023;
|
||
|
|
C = (C>>>8) ^ T0[(C ^ (240|((c>>8)&7)))&0xFF];
|
||
|
|
C = (C>>>8) ^ T0[(C ^ (128|((c>>2)&63)))&0xFF];
|
||
|
|
C = (C>>>8) ^ T0[(C ^ (128|((d>>6)&15)|((c&3)<<4)))&0xFF];
|
||
|
|
C = (C>>>8) ^ T0[(C ^ (128|(d&63)))&0xFF];
|
||
|
|
} else {
|
||
|
|
C = (C>>>8) ^ T0[(C ^ (224|((c>>12)&15)))&0xFF];
|
||
|
|
C = (C>>>8) ^ T0[(C ^ (128|((c>>6)&63)))&0xFF];
|
||
|
|
C = (C>>>8) ^ T0[(C ^ (128|(c&63)))&0xFF];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return ~C;
|
||
|
|
}
|
||
|
|
CRC32C.table = T0;
|
||
|
|
// $FlowIgnore
|
||
|
|
CRC32C.bstr = crc32_bstr;
|
||
|
|
// $FlowIgnore
|
||
|
|
CRC32C.buf = crc32_buf;
|
||
|
|
// $FlowIgnore
|
||
|
|
CRC32C.str = crc32_str;
|
||
|
|
}));
|