267 lines
3.8 KiB
JavaScript
267 lines
3.8 KiB
JavaScript
const LOOKUP = Int32Array.from([
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0x00000000,
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0x77073096,
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0xee0e612c,
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0x990951ba,
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0x076dc419,
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0x706af48f,
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0xe963a535,
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0x9e6495a3,
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0x0edb8832,
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0x79dcb8a4,
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0xe0d5e91e,
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0x97d2d988,
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0x09b64c2b,
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0x7eb17cbd,
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0xe7b82d07,
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0x90bf1d91,
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0x1db71064,
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0x6ab020f2,
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0xf3b97148,
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0x84be41de,
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0x1adad47d,
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0x6ddde4eb,
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0xf4d4b551,
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0x83d385c7,
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0x136c9856,
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0x646ba8c0,
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0xfd62f97a,
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0x8a65c9ec,
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0x14015c4f,
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0x63066cd9,
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0xfa0f3d63,
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0x8d080df5,
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0x3b6e20c8,
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0x4c69105e,
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0xd56041e4,
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0xa2677172,
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0x3c03e4d1,
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0x4b04d447,
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0xd20d85fd,
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0xa50ab56b,
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0x35b5a8fa,
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0x42b2986c,
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0xdbbbc9d6,
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0xacbcf940,
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0x32d86ce3,
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0x45df5c75,
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0xdcd60dcf,
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0xabd13d59,
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0x26d930ac,
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0x51de003a,
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0xc8d75180,
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0xbfd06116,
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0x21b4f4b5,
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0x56b3c423,
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0xcfba9599,
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0xb8bda50f,
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0x2802b89e,
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0x5f058808,
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0xc60cd9b2,
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0xb10be924,
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0x2f6f7c87,
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0x58684c11,
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0xc1611dab,
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0xb6662d3d,
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0x76dc4190,
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0x01db7106,
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0x98d220bc,
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0xefd5102a,
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0x71b18589,
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0x06b6b51f,
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0x9fbfe4a5,
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0xe8b8d433,
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0x7807c9a2,
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0x0f00f934,
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0x9609a88e,
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0xe10e9818,
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0x7f6a0dbb,
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0x086d3d2d,
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0x91646c97,
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0xe6635c01,
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0x6b6b51f4,
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0x1c6c6162,
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0x856530d8,
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0xf262004e,
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0x6c0695ed,
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0x1b01a57b,
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0x8208f4c1,
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0xf50fc457,
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0x65b0d9c6,
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0x12b7e950,
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0x8bbeb8ea,
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0xfcb9887c,
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0x62dd1ddf,
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0x15da2d49,
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0x8cd37cf3,
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0xfbd44c65,
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0x4db26158,
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0x3ab551ce,
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0xa3bc0074,
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0xd4bb30e2,
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0x4adfa541,
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0x3dd895d7,
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0xa4d1c46d,
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0xd3d6f4fb,
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0x4369e96a,
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0x346ed9fc,
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0xad678846,
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0xda60b8d0,
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0x44042d73,
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0x33031de5,
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0xaa0a4c5f,
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0xdd0d7cc9,
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0x5005713c,
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0x270241aa,
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0xbe0b1010,
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0xc90c2086,
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0x5768b525,
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0x206f85b3,
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0xb966d409,
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0xce61e49f,
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0x5edef90e,
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0x29d9c998,
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0xb0d09822,
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0xc7d7a8b4,
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0x59b33d17,
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0x2eb40d81,
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0xb7bd5c3b,
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0xc0ba6cad,
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0xedb88320,
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0x9abfb3b6,
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0x03b6e20c,
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0x74b1d29a,
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0xead54739,
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0x9dd277af,
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0x04db2615,
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0x73dc1683,
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0xe3630b12,
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0x94643b84,
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0x0d6d6a3e,
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0x7a6a5aa8,
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0xe40ecf0b,
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0x9309ff9d,
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0x0a00ae27,
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0x7d079eb1,
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0xf00f9344,
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0x8708a3d2,
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0x1e01f268,
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0x6906c2fe,
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0xf762575d,
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0x806567cb,
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0x196c3671,
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0x6e6b06e7,
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0xfed41b76,
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0x89d32be0,
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0x10da7a5a,
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0x67dd4acc,
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0xf9b9df6f,
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0x8ebeeff9,
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0x17b7be43,
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0x60b08ed5,
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0xd6d6a3e8,
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0xa1d1937e,
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0x38d8c2c4,
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0x4fdff252,
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0xd1bb67f1,
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0xa6bc5767,
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0x3fb506dd,
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0x48b2364b,
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0xd80d2bda,
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0xaf0a1b4c,
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0x36034af6,
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0x41047a60,
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0xdf60efc3,
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0xa867df55,
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0x316e8eef,
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0x4669be79,
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0xcb61b38c,
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0xbc66831a,
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0x256fd2a0,
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0x5268e236,
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0xcc0c7795,
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0xbb0b4703,
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0x220216b9,
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0x5505262f,
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0xc5ba3bbe,
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0xb2bd0b28,
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0x2bb45a92,
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0x5cb36a04,
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0xc2d7ffa7,
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0xb5d0cf31,
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0x2cd99e8b,
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0x5bdeae1d,
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0x9b64c2b0,
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0xec63f226,
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0x756aa39c,
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0x026d930a,
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0x9c0906a9,
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0xeb0e363f,
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0x72076785,
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0x05005713,
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0x95bf4a82,
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0xe2b87a14,
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0x7bb12bae,
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0x0cb61b38,
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0x92d28e9b,
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0xe5d5be0d,
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0x7cdcefb7,
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0x0bdbdf21,
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0x86d3d2d4,
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0xf1d4e242,
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0x68ddb3f8,
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0x1fda836e,
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0x81be16cd,
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0xf6b9265b,
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0x6fb077e1,
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0x18b74777,
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0x88085ae6,
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0xff0f6a70,
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0x66063bca,
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0x11010b5c,
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0x8f659eff,
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0xf862ae69,
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0x616bffd3,
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0x166ccf45,
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0xa00ae278,
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0xd70dd2ee,
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0x4e048354,
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0x3903b3c2,
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0xa7672661,
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0xd06016f7,
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0x4969474d,
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0x3e6e77db,
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0xaed16a4a,
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0xd9d65adc,
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0x40df0b66,
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0x37d83bf0,
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0xa9bcae53,
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0xdebb9ec5,
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0x47b2cf7f,
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0x30b5ffe9,
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0xbdbdf21c,
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0xcabac28a,
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0x53b39330,
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0x24b4a3a6,
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0xbad03605,
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0xcdd70693,
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0x54de5729,
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0x23d967bf,
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0xb3667a2e,
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0xc4614ab8,
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0x5d681b02,
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0x2a6f2b94,
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0xb40bbe37,
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0xc30c8ea1,
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0x5a05df1b,
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0x2d02ef8d
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]);
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module.exports = function crc32(uint8Array, previous) {
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let crc = previous === 0 ? 0 : ~~previous ^ -1;
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for (let i = 0; i < uint8Array.byteLength; i++) {
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crc = LOOKUP[(crc ^ uint8Array[i]) & 0xff] ^ (crc >>> 8);
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}
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return (crc ^ -1) >>> 0;
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};
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