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  • CRC32

    2019-10-03 17:40:00
    package org.samuel.util; /** * @author yangfeng * */ public class CRC32 { static final int crc_c[] ={ 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x07...
    package org.samuel.util;
    
    /**
     * @author yangfeng
     *
     */
    public class CRC32 {
        
        static final int crc_c[] ={
            0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
            0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
            0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
            0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
            0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
            0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
            0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
            0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
            0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
            0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
            0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
            0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
            0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
            0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
            0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
            0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
            0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
            0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
            0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
            0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
            0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
            0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
            0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
            0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
            0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
            0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
            0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
            0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
            0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
            0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
            0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
            0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
            0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
            0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
            0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
            0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
            0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
            0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
            0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
            0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
            0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
            0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
            0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
            0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
            0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
            0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
            0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
            0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
            0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
            0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
            0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
            0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
            0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
            0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
            0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
            0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
            0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
            0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
            0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
            0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
            0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
            0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
            0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
            0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
        };
        
        /**
         * @param c
         * @param d
         * @return
         */
        private static int crc32c(int c, byte d){
            return (c>>8)^crc_c[(c^(d))&0xff];
        }
        
        /**
         * @param data
         * @param offset
         * @param length
         * @return
         */
        public static int computeCrc(byte[] data, int offset, int length){
            int i;
            int crc32 = -1;
            for (i = 0; i < length; i++){
                crc32 = crc32c(crc32, data[i+offset]);
            }
            return ~crc32;
        }
    }

    转载于:https://www.cnblogs.com/onliny/archive/2012/06/27/2566214.html

    展开全文
  • crc32

    2017-04-29 18:51:10
    前言cm中有一段计算crc32的函数(上网查crc表数据,对上了), 按照IDA伪码做的函数计算结果并不对. 手工扒了一次,经过单步, IDE中和OD中的每一步都对上了. 因为计算过程代码量较少,没有找现成的crc32实现. 将crc...

    前言

    cm中有一段计算crc32的函数(上网查crc表数据,对上了), 按照IDA伪码做的函数计算结果并不对.
    手工扒了一次,经过单步, IDE中和OD中的每一步都对上了.
    因为计算过程代码量较少,没有找现成的crc32实现. 将crc表数据和算法扒出来即可.

    记录

    DWORD crc32_401160(BYTE* pcBuf, DWORD dwLenBuf)
    {
        DWORD dwRc = -1;
        DWORD dwInitVaule = -1;
        DWORD dwInitVauleCpy = -1;
        DWORD dwTmp = 0;
        DWORD dwIndex = 0;
    
        if ((NULL == pcBuf) || (0 == dwLenBuf) || ((DWORD) - 1 == dwLenBuf)) {
            return dwRc;
        }
    
        do {
            dwTmp = 0;
            dwInitVauleCpy = dwInitVaule;
            dwTmp = pcBuf[dwIndex];
            dwInitVauleCpy &= 0xff;
            dwTmp ^= dwInitVauleCpy;
            dwInitVaule >>= 8;
            dwTmp = *((DWORD*)ucCrc32TblAry + dwTmp);
            dwInitVaule ^= dwTmp;
            dwIndex++;
        } while (dwIndex < dwLenBuf);
    
        dwRc = ~dwInitVaule;
        return dwRc;
    }
    
    BYTE ucCrc32TblAry[1024] = {
        0x00, 0x00, 0x00, 0x00, 0x96, 0x30, 0x07, 0x77, 0x2C, 0x61, 0x0E, 0xEE, 0xBA, 0x51, 0x09, 0x99,
        0x19, 0xC4, 0x6D, 0x07, 0x8F, 0xF4, 0x6A, 0x70, 0x35, 0xA5, 0x63, 0xE9, 0xA3, 0x95, 0x64, 0x9E,
        0x32, 0x88, 0xDB, 0x0E, 0xA4, 0xB8, 0xDC, 0x79, 0x1E, 0xE9, 0xD5, 0xE0, 0x88, 0xD9, 0xD2, 0x97,
        0x2B, 0x4C, 0xB6, 0x09, 0xBD, 0x7C, 0xB1, 0x7E, 0x07, 0x2D, 0xB8, 0xE7, 0x91, 0x1D, 0xBF, 0x90,
        0x64, 0x10, 0xB7, 0x1D, 0xF2, 0x20, 0xB0, 0x6A, 0x48, 0x71, 0xB9, 0xF3, 0xDE, 0x41, 0xBE, 0x84,
        0x7D, 0xD4, 0xDA, 0x1A, 0xEB, 0xE4, 0xDD, 0x6D, 0x51, 0xB5, 0xD4, 0xF4, 0xC7, 0x85, 0xD3, 0x83,
        0x56, 0x98, 0x6C, 0x13, 0xC0, 0xA8, 0x6B, 0x64, 0x7A, 0xF9, 0x62, 0xFD, 0xEC, 0xC9, 0x65, 0x8A,
        0x4F, 0x5C, 0x01, 0x14, 0xD9, 0x6C, 0x06, 0x63, 0x63, 0x3D, 0x0F, 0xFA, 0xF5, 0x0D, 0x08, 0x8D,
        0xC8, 0x20, 0x6E, 0x3B, 0x5E, 0x10, 0x69, 0x4C, 0xE4, 0x41, 0x60, 0xD5, 0x72, 0x71, 0x67, 0xA2,
        0xD1, 0xE4, 0x03, 0x3C, 0x47, 0xD4, 0x04, 0x4B, 0xFD, 0x85, 0x0D, 0xD2, 0x6B, 0xB5, 0x0A, 0xA5,
        0xFA, 0xA8, 0xB5, 0x35, 0x6C, 0x98, 0xB2, 0x42, 0xD6, 0xC9, 0xBB, 0xDB, 0x40, 0xF9, 0xBC, 0xAC,
        0xE3, 0x6C, 0xD8, 0x32, 0x75, 0x5C, 0xDF, 0x45, 0xCF, 0x0D, 0xD6, 0xDC, 0x59, 0x3D, 0xD1, 0xAB,
        0xAC, 0x30, 0xD9, 0x26, 0x3A, 0x00, 0xDE, 0x51, 0x80, 0x51, 0xD7, 0xC8, 0x16, 0x61, 0xD0, 0xBF,
        0xB5, 0xF4, 0xB4, 0x21, 0x23, 0xC4, 0xB3, 0x56, 0x99, 0x95, 0xBA, 0xCF, 0x0F, 0xA5, 0xBD, 0xB8,
        0x9E, 0xB8, 0x02, 0x28, 0x08, 0x88, 0x05, 0x5F, 0xB2, 0xD9, 0x0C, 0xC6, 0x24, 0xE9, 0x0B, 0xB1,
        0x87, 0x7C, 0x6F, 0x2F, 0x11, 0x4C, 0x68, 0x58, 0xAB, 0x1D, 0x61, 0xC1, 0x3D, 0x2D, 0x66, 0xB6,
        0x90, 0x41, 0xDC, 0x76, 0x06, 0x71, 0xDB, 0x01, 0xBC, 0x20, 0xD2, 0x98, 0x2A, 0x10, 0xD5, 0xEF,
        0x89, 0x85, 0xB1, 0x71, 0x1F, 0xB5, 0xB6, 0x06, 0xA5, 0xE4, 0xBF, 0x9F, 0x33, 0xD4, 0xB8, 0xE8,
        0xA2, 0xC9, 0x07, 0x78, 0x34, 0xF9, 0x00, 0x0F, 0x8E, 0xA8, 0x09, 0x96, 0x18, 0x98, 0x0E, 0xE1,
        0xBB, 0x0D, 0x6A, 0x7F, 0x2D, 0x3D, 0x6D, 0x08, 0x97, 0x6C, 0x64, 0x91, 0x01, 0x5C, 0x63, 0xE6,
        0xF4, 0x51, 0x6B, 0x6B, 0x62, 0x61, 0x6C, 0x1C, 0xD8, 0x30, 0x65, 0x85, 0x4E, 0x00, 0x62, 0xF2,
        0xED, 0x95, 0x06, 0x6C, 0x7B, 0xA5, 0x01, 0x1B, 0xC1, 0xF4, 0x08, 0x82, 0x57, 0xC4, 0x0F, 0xF5,
        0xC6, 0xD9, 0xB0, 0x65, 0x50, 0xE9, 0xB7, 0x12, 0xEA, 0xB8, 0xBE, 0x8B, 0x7C, 0x88, 0xB9, 0xFC,
        0xDF, 0x1D, 0xDD, 0x62, 0x49, 0x2D, 0xDA, 0x15, 0xF3, 0x7C, 0xD3, 0x8C, 0x65, 0x4C, 0xD4, 0xFB,
        0x58, 0x61, 0xB2, 0x4D, 0xCE, 0x51, 0xB5, 0x3A, 0x74, 0x00, 0xBC, 0xA3, 0xE2, 0x30, 0xBB, 0xD4,
        0x41, 0xA5, 0xDF, 0x4A, 0xD7, 0x95, 0xD8, 0x3D, 0x6D, 0xC4, 0xD1, 0xA4, 0xFB, 0xF4, 0xD6, 0xD3,
        0x6A, 0xE9, 0x69, 0x43, 0xFC, 0xD9, 0x6E, 0x34, 0x46, 0x88, 0x67, 0xAD, 0xD0, 0xB8, 0x60, 0xDA,
        0x73, 0x2D, 0x04, 0x44, 0xE5, 0x1D, 0x03, 0x33, 0x5F, 0x4C, 0x0A, 0xAA, 0xC9, 0x7C, 0x0D, 0xDD,
        0x3C, 0x71, 0x05, 0x50, 0xAA, 0x41, 0x02, 0x27, 0x10, 0x10, 0x0B, 0xBE, 0x86, 0x20, 0x0C, 0xC9,
        0x25, 0xB5, 0x68, 0x57, 0xB3, 0x85, 0x6F, 0x20, 0x09, 0xD4, 0x66, 0xB9, 0x9F, 0xE4, 0x61, 0xCE,
        0x0E, 0xF9, 0xDE, 0x5E, 0x98, 0xC9, 0xD9, 0x29, 0x22, 0x98, 0xD0, 0xB0, 0xB4, 0xA8, 0xD7, 0xC7,
        0x17, 0x3D, 0xB3, 0x59, 0x81, 0x0D, 0xB4, 0x2E, 0x3B, 0x5C, 0xBD, 0xB7, 0xAD, 0x6C, 0xBA, 0xC0,
        0x20, 0x83, 0xB8, 0xED, 0xB6, 0xB3, 0xBF, 0x9A, 0x0C, 0xE2, 0xB6, 0x03, 0x9A, 0xD2, 0xB1, 0x74,
        0x39, 0x47, 0xD5, 0xEA, 0xAF, 0x77, 0xD2, 0x9D, 0x15, 0x26, 0xDB, 0x04, 0x83, 0x16, 0xDC, 0x73,
        0x12, 0x0B, 0x63, 0xE3, 0x84, 0x3B, 0x64, 0x94, 0x3E, 0x6A, 0x6D, 0x0D, 0xA8, 0x5A, 0x6A, 0x7A,
        0x0B, 0xCF, 0x0E, 0xE4, 0x9D, 0xFF, 0x09, 0x93, 0x27, 0xAE, 0x00, 0x0A, 0xB1, 0x9E, 0x07, 0x7D,
        0x44, 0x93, 0x0F, 0xF0, 0xD2, 0xA3, 0x08, 0x87, 0x68, 0xF2, 0x01, 0x1E, 0xFE, 0xC2, 0x06, 0x69,
        0x5D, 0x57, 0x62, 0xF7, 0xCB, 0x67, 0x65, 0x80, 0x71, 0x36, 0x6C, 0x19, 0xE7, 0x06, 0x6B, 0x6E,
        0x76, 0x1B, 0xD4, 0xFE, 0xE0, 0x2B, 0xD3, 0x89, 0x5A, 0x7A, 0xDA, 0x10, 0xCC, 0x4A, 0xDD, 0x67,
        0x6F, 0xDF, 0xB9, 0xF9, 0xF9, 0xEF, 0xBE, 0x8E, 0x43, 0xBE, 0xB7, 0x17, 0xD5, 0x8E, 0xB0, 0x60,
        0xE8, 0xA3, 0xD6, 0xD6, 0x7E, 0x93, 0xD1, 0xA1, 0xC4, 0xC2, 0xD8, 0x38, 0x52, 0xF2, 0xDF, 0x4F,
        0xF1, 0x67, 0xBB, 0xD1, 0x67, 0x57, 0xBC, 0xA6, 0xDD, 0x06, 0xB5, 0x3F, 0x4B, 0x36, 0xB2, 0x48,
        0xDA, 0x2B, 0x0D, 0xD8, 0x4C, 0x1B, 0x0A, 0xAF, 0xF6, 0x4A, 0x03, 0x36, 0x60, 0x7A, 0x04, 0x41,
        0xC3, 0xEF, 0x60, 0xDF, 0x55, 0xDF, 0x67, 0xA8, 0xEF, 0x8E, 0x6E, 0x31, 0x79, 0xBE, 0x69, 0x46,
        0x8C, 0xB3, 0x61, 0xCB, 0x1A, 0x83, 0x66, 0xBC, 0xA0, 0xD2, 0x6F, 0x25, 0x36, 0xE2, 0x68, 0x52,
        0x95, 0x77, 0x0C, 0xCC, 0x03, 0x47, 0x0B, 0xBB, 0xB9, 0x16, 0x02, 0x22, 0x2F, 0x26, 0x05, 0x55,
        0xBE, 0x3B, 0xBA, 0xC5, 0x28, 0x0B, 0xBD, 0xB2, 0x92, 0x5A, 0xB4, 0x2B, 0x04, 0x6A, 0xB3, 0x5C,
        0xA7, 0xFF, 0xD7, 0xC2, 0x31, 0xCF, 0xD0, 0xB5, 0x8B, 0x9E, 0xD9, 0x2C, 0x1D, 0xAE, 0xDE, 0x5B,
        0xB0, 0xC2, 0x64, 0x9B, 0x26, 0xF2, 0x63, 0xEC, 0x9C, 0xA3, 0x6A, 0x75, 0x0A, 0x93, 0x6D, 0x02,
        0xA9, 0x06, 0x09, 0x9C, 0x3F, 0x36, 0x0E, 0xEB, 0x85, 0x67, 0x07, 0x72, 0x13, 0x57, 0x00, 0x05,
        0x82, 0x4A, 0xBF, 0x95, 0x14, 0x7A, 0xB8, 0xE2, 0xAE, 0x2B, 0xB1, 0x7B, 0x38, 0x1B, 0xB6, 0x0C,
        0x9B, 0x8E, 0xD2, 0x92, 0x0D, 0xBE, 0xD5, 0xE5, 0xB7, 0xEF, 0xDC, 0x7C, 0x21, 0xDF, 0xDB, 0x0B,
        0xD4, 0xD2, 0xD3, 0x86, 0x42, 0xE2, 0xD4, 0xF1, 0xF8, 0xB3, 0xDD, 0x68, 0x6E, 0x83, 0xDA, 0x1F,
        0xCD, 0x16, 0xBE, 0x81, 0x5B, 0x26, 0xB9, 0xF6, 0xE1, 0x77, 0xB0, 0x6F, 0x77, 0x47, 0xB7, 0x18,
        0xE6, 0x5A, 0x08, 0x88, 0x70, 0x6A, 0x0F, 0xFF, 0xCA, 0x3B, 0x06, 0x66, 0x5C, 0x0B, 0x01, 0x11,
        0xFF, 0x9E, 0x65, 0x8F, 0x69, 0xAE, 0x62, 0xF8, 0xD3, 0xFF, 0x6B, 0x61, 0x45, 0xCF, 0x6C, 0x16,
        0x78, 0xE2, 0x0A, 0xA0, 0xEE, 0xD2, 0x0D, 0xD7, 0x54, 0x83, 0x04, 0x4E, 0xC2, 0xB3, 0x03, 0x39,
        0x61, 0x26, 0x67, 0xA7, 0xF7, 0x16, 0x60, 0xD0, 0x4D, 0x47, 0x69, 0x49, 0xDB, 0x77, 0x6E, 0x3E,
        0x4A, 0x6A, 0xD1, 0xAE, 0xDC, 0x5A, 0xD6, 0xD9, 0x66, 0x0B, 0xDF, 0x40, 0xF0, 0x3B, 0xD8, 0x37,
        0x53, 0xAE, 0xBC, 0xA9, 0xC5, 0x9E, 0xBB, 0xDE, 0x7F, 0xCF, 0xB2, 0x47, 0xE9, 0xFF, 0xB5, 0x30,
        0x1C, 0xF2, 0xBD, 0xBD, 0x8A, 0xC2, 0xBA, 0xCA, 0x30, 0x93, 0xB3, 0x53, 0xA6, 0xA3, 0xB4, 0x24,
        0x05, 0x36, 0xD0, 0xBA, 0x93, 0x06, 0xD7, 0xCD, 0x29, 0x57, 0xDE, 0x54, 0xBF, 0x67, 0xD9, 0x23,
        0x2E, 0x7A, 0x66, 0xB3, 0xB8, 0x4A, 0x61, 0xC4, 0x02, 0x1B, 0x68, 0x5D, 0x94, 0x2B, 0x6F, 0x2A,
        0x37, 0xBE, 0x0B, 0xB4, 0xA1, 0x8E, 0x0C, 0xC3, 0x1B, 0xDF, 0x05, 0x5A, 0x8D, 0xEF, 0x02, 0x2D
    };
    
    展开全文
  • CRC 32

    2019-10-17 16:11:53
    static const unsigned int crc32tab[]= { 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L, 0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L, 0xe0d5e91eL, 0x97d2d988L, 0x09...

    static const unsigned int crc32tab[]= {
    0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL,
    0x076dc419L, 0x706af48fL, 0xe963a535L, 0x9e6495a3L,
    0x0edb8832L, 0x79dcb8a4L, 0xe0d5e91eL, 0x97d2d988L,
    0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L, 0x90bf1d91L,
    0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
    0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L,
    0x136c9856L, 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL,
    0x14015c4fL, 0x63066cd9L, 0xfa0f3d63L, 0x8d080df5L,
    0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L, 0xa2677172L,
    0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
    0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L,
    0x32d86ce3L, 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L,
    0x26d930acL, 0x51de003aL, 0xc8d75180L, 0xbfd06116L,
    0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L, 0xb8bda50fL,
    0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
    0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL,
    0x76dc4190L, 0x01db7106L, 0x98d220bcL, 0xefd5102aL,
    0x71b18589L, 0x06b6b51fL, 0x9fbfe4a5L, 0xe8b8d433L,
    0x7807c9a2L, 0x0f00f934L, 0x9609a88eL, 0xe10e9818L,
    0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
    0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL,
    0x6c0695edL, 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L,
    0x65b0d9c6L, 0x12b7e950L, 0x8bbeb8eaL, 0xfcb9887cL,
    0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L, 0xfbd44c65L,
    0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
    0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL,
    0x4369e96aL, 0x346ed9fcL, 0xad678846L, 0xda60b8d0L,
    0x44042d73L, 0x33031de5L, 0xaa0a4c5fL, 0xdd0d7cc9L,
    0x5005713cL, 0x270241aaL, 0xbe0b1010L, 0xc90c2086L,
    0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
    0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L,
    0x59b33d17L, 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL,
    0xedb88320L, 0x9abfb3b6L, 0x03b6e20cL, 0x74b1d29aL,
    0xead54739L, 0x9dd277afL, 0x04db2615L, 0x73dc1683L,
    0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
    0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L,
    0xf00f9344L, 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL,
    0xf762575dL, 0x806567cbL, 0x196c3671L, 0x6e6b06e7L,
    0xfed41b76L, 0x89d32be0L, 0x10da7a5aL, 0x67dd4accL,
    0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
    0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L,
    0xd1bb67f1L, 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL,
    0xd80d2bdaL, 0xaf0a1b4cL, 0x36034af6L, 0x41047a60L,
    0xdf60efc3L, 0xa867df55L, 0x316e8eefL, 0x4669be79L,
    0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
    0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL,
    0xc5ba3bbeL, 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L,
    0xc2d7ffa7L, 0xb5d0cf31L, 0x2cd99e8bL, 0x5bdeae1dL,
    0x9b64c2b0L, 0xec63f226L, 0x756aa39cL, 0x026d930aL,
    0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
    0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L,
    0x92d28e9bL, 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L,
    0x86d3d2d4L, 0xf1d4e242L, 0x68ddb3f8L, 0x1fda836eL,
    0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L, 0x18b74777L,
    0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
    0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L,
    0xa00ae278L, 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L,
    0xa7672661L, 0xd06016f7L, 0x4969474dL, 0x3e6e77dbL,
    0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L, 0x37d83bf0L,
    0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
    0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L,
    0xbad03605L, 0xcdd70693L, 0x54de5729L, 0x23d967bfL,
    0xb3667a2eL, 0xc4614ab8L, 0x5d681b02L, 0x2a6f2b94L,
    0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL, 0x2d02ef8dL
    };

    unsigned int crc = 0xFFFFFFFF;
    for (int i = 0; i < hwid.length(); i++)
    crc = crc32tab[(crc ^ hwid.at(i).unicode()) & 0xff] ^ (crc >> 8);
    return QString::number((crc^0xFFFFFFFF),16);

    展开全文
  • crc32:CRC32工具

    2021-05-11 15:09:02
    CRC32工具 执照 此项目已获得GPL v3许可证的许可。 用法 运行命令行以查看用法说明: $ crc32.py -h usage: crc32.py [-h] action ... Reverse, undo, and calculate CRC32 checksums positional arguments: ...
  • CRC32 Tools License This project is licensed under the GPL v3 license. Usage Run the command line to see usage instructions: crc32.py -h usage: crc32.py [-h] action ... Reverse, undo, and ...
  • CRC32实现,支持所有crc32多项式,以及(如果您安装pecl扩展名)硬件加速版本的CRC32C(Castagnoli)。 通过PHP 7.4支持PHP 5.4。 用法 require 'vendor/autoload.php' ; use Google \ CRC32 \ CRC32 ; $ crc = ...
  • crc32c

    千次阅读 2017-10-10 14:33:34
    // Return the crc32c of concat(A, data[0,n-1]) where init_crc is the // crc32c of some string A. Extend() is often used to maintain the // crc32c of a stream of ...
    // Copyright (c) 2011 The LevelDB Authors. All rights reserved.
    // Use of this source code is governed by a BSD-style license that can be
    // found in the LICENSE file. See the AUTHORS file for names of contributors.
    
    #ifndef STORAGE_LEVELDB_UTIL_CRC32C_H_
    #define STORAGE_LEVELDB_UTIL_CRC32C_H_
    
    #include <stddef.h>
    #include <stdint.h>
    
    namespace leveldb 
    {
    	namespace crc32c 
    	{
    
    		// Return the crc32c of concat(A, data[0,n-1]) where init_crc is the
    		// crc32c of some string A.  Extend() is often used to maintain the
    		// crc32c of a stream of data.
    		extern uint32_t Extenduint32_t init_crc, const char* data, size_t n );
    
    		// Return the crc32c of data[0,n-1]
    		inline uint32_t Valueconst char* data, size_t n ) 
    		{
    			return Extend( 0, data, n );
    		}
    
    		static const uint32_t kMaskDelta = 0xa282ead8ul;
    
    		// Return a masked representation of crc.
    		//
    		// Motivation: it is problematic to compute the CRC of a string that
    		// contains embedded CRCs.  Therefore we recommend that CRCs stored
    		// somewhere (e.g., in files) should be masked before being stored.
    		inline uint32_t Maskuint32_t crc )
    		{
    			// Rotate right by 15 bits and add a constant.
    			return ((crc >> 15) | (crc << 17)) + kMaskDelta;
    		}
    
    		// Return the crc whose masked representation is masked_crc.
    		inline uint32_t Unmaskuint32_t masked_crc )
    		{
    			uint32_t rot = masked_crc - kMaskDelta;
    			return ((rot >> 17) | (rot << 15));
    		}
    
    	}  // namespace crc32c
    }  // namespace leveldb
    
    #endif  // STORAGE_LEVELDB_UTIL_CRC32C_H_
    
    
    空间换时间,预先计算好,直接处理,16个字节16个字节的处理,处理起来快
    
    
    // Copyright (c) 2011 The LevelDB Authors. All rights reserved.
    // Use of this source code is governed by a BSD-style license that can be
    // found in the LICENSE file. See the AUTHORS file for names of contributors.
    //
    // A portable implementation of crc32c, optimized to handle
    // four bytes at a time.
    
    #include "util/crc32c.h"
    
    #include <stdint.h>
    #include "util/coding.h"
    
    namespace leveldb
    {
    
    	namespace crc32c 
    	{
    
    		static const uint32_t table0_[256] = 
    		{
    			0x00000000, 0xf26b8303, 0xe13b70f7, 0x1350f3f4,
    			0xc79a971f, 0x35f1141c, 0x26a1e7e8, 0xd4ca64eb,
    			0x8ad958cf, 0x78b2dbcc, 0x6be22838, 0x9989ab3b,
    			0x4d43cfd0, 0xbf284cd3, 0xac78bf27, 0x5e133c24,
    			0x105ec76f, 0xe235446c, 0xf165b798, 0x030e349b,
    			0xd7c45070, 0x25afd373, 0x36ff2087, 0xc494a384,
    			0x9a879fa0, 0x68ec1ca3, 0x7bbcef57, 0x89d76c54,
    			0x5d1d08bf, 0xaf768bbc, 0xbc267848, 0x4e4dfb4b,
    			0x20bd8ede, 0xd2d60ddd, 0xc186fe29, 0x33ed7d2a,
    			0xe72719c1, 0x154c9ac2, 0x061c6936, 0xf477ea35,
    			0xaa64d611, 0x580f5512, 0x4b5fa6e6, 0xb93425e5,
    			0x6dfe410e, 0x9f95c20d, 0x8cc531f9, 0x7eaeb2fa,
    			0x30e349b1, 0xc288cab2, 0xd1d83946, 0x23b3ba45,
    			0xf779deae, 0x05125dad, 0x1642ae59, 0xe4292d5a,
    			0xba3a117e, 0x4851927d, 0x5b016189, 0xa96ae28a,
    			0x7da08661, 0x8fcb0562, 0x9c9bf696, 0x6ef07595,
    			0x417b1dbc, 0xb3109ebf, 0xa0406d4b, 0x522bee48,
    			0x86e18aa3, 0x748a09a0, 0x67dafa54, 0x95b17957,
    			0xcba24573, 0x39c9c670, 0x2a993584, 0xd8f2b687,
    			0x0c38d26c, 0xfe53516f, 0xed03a29b, 0x1f682198,
    			0x5125dad3, 0xa34e59d0, 0xb01eaa24, 0x42752927,
    			0x96bf4dcc, 0x64d4cecf, 0x77843d3b, 0x85efbe38,
    			0xdbfc821c, 0x2997011f, 0x3ac7f2eb, 0xc8ac71e8,
    			0x1c661503, 0xee0d9600, 0xfd5d65f4, 0x0f36e6f7,
    			0x61c69362, 0x93ad1061, 0x80fde395, 0x72966096,
    			0xa65c047d, 0x5437877e, 0x4767748a, 0xb50cf789,
    			0xeb1fcbad, 0x197448ae, 0x0a24bb5a, 0xf84f3859,
    			0x2c855cb2, 0xdeeedfb1, 0xcdbe2c45, 0x3fd5af46,
    			0x7198540d, 0x83f3d70e, 0x90a324fa, 0x62c8a7f9,
    			0xb602c312, 0x44694011, 0x5739b3e5, 0xa55230e6,
    			0xfb410cc2, 0x092a8fc1, 0x1a7a7c35, 0xe811ff36,
    			0x3cdb9bdd, 0xceb018de, 0xdde0eb2a, 0x2f8b6829,
    			0x82f63b78, 0x709db87b, 0x63cd4b8f, 0x91a6c88c,
    			0x456cac67, 0xb7072f64, 0xa457dc90, 0x563c5f93,
    			0x082f63b7, 0xfa44e0b4, 0xe9141340, 0x1b7f9043,
    			0xcfb5f4a8, 0x3dde77ab, 0x2e8e845f, 0xdce5075c,
    			0x92a8fc17, 0x60c37f14, 0x73938ce0, 0x81f80fe3,
    			0x55326b08, 0xa759e80b, 0xb4091bff, 0x466298fc,
    			0x1871a4d8, 0xea1a27db, 0xf94ad42f, 0x0b21572c,
    			0xdfeb33c7, 0x2d80b0c4, 0x3ed04330, 0xccbbc033,
    			0xa24bb5a6, 0x502036a5, 0x4370c551, 0xb11b4652,
    			0x65d122b9, 0x97baa1ba, 0x84ea524e, 0x7681d14d,
    			0x2892ed69, 0xdaf96e6a, 0xc9a99d9e, 0x3bc21e9d,
    			0xef087a76, 0x1d63f975, 0x0e330a81, 0xfc588982,
    			0xb21572c9, 0x407ef1ca, 0x532e023e, 0xa145813d,
    			0x758fe5d6, 0x87e466d5, 0x94b49521, 0x66df1622,
    			0x38cc2a06, 0xcaa7a905, 0xd9f75af1, 0x2b9cd9f2,
    			0xff56bd19, 0x0d3d3e1a, 0x1e6dcdee, 0xec064eed,
    			0xc38d26c4, 0x31e6a5c7, 0x22b65633, 0xd0ddd530,
    			0x0417b1db, 0xf67c32d8, 0xe52cc12c, 0x1747422f,
    			0x49547e0b, 0xbb3ffd08, 0xa86f0efc, 0x5a048dff,
    			0x8ecee914, 0x7ca56a17, 0x6ff599e3, 0x9d9e1ae0,
    			0xd3d3e1ab, 0x21b862a8, 0x32e8915c, 0xc083125f,
    			0x144976b4, 0xe622f5b7, 0xf5720643, 0x07198540,
    			0x590ab964, 0xab613a67, 0xb831c993, 0x4a5a4a90,
    			0x9e902e7b, 0x6cfbad78, 0x7fab5e8c, 0x8dc0dd8f,
    			0xe330a81a, 0x115b2b19, 0x020bd8ed, 0xf0605bee,
    			0x24aa3f05, 0xd6c1bc06, 0xc5914ff2, 0x37faccf1,
    			0x69e9f0d5, 0x9b8273d6, 0x88d28022, 0x7ab90321,
    			0xae7367ca, 0x5c18e4c9, 0x4f48173d, 0xbd23943e,
    			0xf36e6f75, 0x0105ec76, 0x12551f82, 0xe03e9c81,
    			0x34f4f86a, 0xc69f7b69, 0xd5cf889d, 0x27a40b9e,
    			0x79b737ba, 0x8bdcb4b9, 0x988c474d, 0x6ae7c44e,
    			0xbe2da0a5, 0x4c4623a6, 0x5f16d052, 0xad7d5351
    		};
    
    		static const uint32_t table1_[256] =
    		{
    			0x00000000, 0x13a29877, 0x274530ee, 0x34e7a899,
    			0x4e8a61dc, 0x5d28f9ab, 0x69cf5132, 0x7a6dc945,
    			0x9d14c3b8, 0x8eb65bcf, 0xba51f356, 0xa9f36b21,
    			0xd39ea264, 0xc03c3a13, 0xf4db928a, 0xe7790afd,
    			0x3fc5f181, 0x2c6769f6, 0x1880c16f, 0x0b225918,
    			0x714f905d, 0x62ed082a, 0x560aa0b3, 0x45a838c4,
    			0xa2d13239, 0xb173aa4e, 0x859402d7, 0x96369aa0,
    			0xec5b53e5, 0xfff9cb92, 0xcb1e630b, 0xd8bcfb7c,
    			0x7f8be302, 0x6c297b75, 0x58ced3ec, 0x4b6c4b9b,
    			0x310182de, 0x22a31aa9, 0x1644b230, 0x05e62a47,
    			0xe29f20ba, 0xf13db8cd, 0xc5da1054, 0xd6788823,
    			0xac154166, 0xbfb7d911, 0x8b507188, 0x98f2e9ff,
    			0x404e1283, 0x53ec8af4, 0x670b226d, 0x74a9ba1a,
    			0x0ec4735f, 0x1d66eb28, 0x298143b1, 0x3a23dbc6,
    			0xdd5ad13b, 0xcef8494c, 0xfa1fe1d5, 0xe9bd79a2,
    			0x93d0b0e7, 0x80722890, 0xb4958009, 0xa737187e,
    			0xff17c604, 0xecb55e73, 0xd852f6ea, 0xcbf06e9d,
    			0xb19da7d8, 0xa23f3faf, 0x96d89736, 0x857a0f41,
    			0x620305bc, 0x71a19dcb, 0x45463552, 0x56e4ad25,
    			0x2c896460, 0x3f2bfc17, 0x0bcc548e, 0x186eccf9,
    			0xc0d23785, 0xd370aff2, 0xe797076b, 0xf4359f1c,
    			0x8e585659, 0x9dface2e, 0xa91d66b7, 0xbabffec0,
    			0x5dc6f43d, 0x4e646c4a, 0x7a83c4d3, 0x69215ca4,
    			0x134c95e1, 0x00ee0d96, 0x3409a50f, 0x27ab3d78,
    			0x809c2506, 0x933ebd71, 0xa7d915e8, 0xb47b8d9f,
    			0xce1644da, 0xddb4dcad, 0xe9537434, 0xfaf1ec43,
    			0x1d88e6be, 0x0e2a7ec9, 0x3acdd650, 0x296f4e27,
    			0x53028762, 0x40a01f15, 0x7447b78c, 0x67e52ffb,
    			0xbf59d487, 0xacfb4cf0, 0x981ce469, 0x8bbe7c1e,
    			0xf1d3b55b, 0xe2712d2c, 0xd69685b5, 0xc5341dc2,
    			0x224d173f, 0x31ef8f48, 0x050827d1, 0x16aabfa6,
    			0x6cc776e3, 0x7f65ee94, 0x4b82460d, 0x5820de7a,
    			0xfbc3faf9, 0xe861628e, 0xdc86ca17, 0xcf245260,
    			0xb5499b25, 0xa6eb0352, 0x920cabcb, 0x81ae33bc,
    			0x66d73941, 0x7575a136, 0x419209af, 0x523091d8,
    			0x285d589d, 0x3bffc0ea, 0x0f186873, 0x1cbaf004,
    			0xc4060b78, 0xd7a4930f, 0xe3433b96, 0xf0e1a3e1,
    			0x8a8c6aa4, 0x992ef2d3, 0xadc95a4a, 0xbe6bc23d,
    			0x5912c8c0, 0x4ab050b7, 0x7e57f82e, 0x6df56059,
    			0x1798a91c, 0x043a316b, 0x30dd99f2, 0x237f0185,
    			0x844819fb, 0x97ea818c, 0xa30d2915, 0xb0afb162,
    			0xcac27827, 0xd960e050, 0xed8748c9, 0xfe25d0be,
    			0x195cda43, 0x0afe4234, 0x3e19eaad, 0x2dbb72da,
    			0x57d6bb9f, 0x447423e8, 0x70938b71, 0x63311306,
    			0xbb8de87a, 0xa82f700d, 0x9cc8d894, 0x8f6a40e3,
    			0xf50789a6, 0xe6a511d1, 0xd242b948, 0xc1e0213f,
    			0x26992bc2, 0x353bb3b5, 0x01dc1b2c, 0x127e835b,
    			0x68134a1e, 0x7bb1d269, 0x4f567af0, 0x5cf4e287,
    			0x04d43cfd, 0x1776a48a, 0x23910c13, 0x30339464,
    			0x4a5e5d21, 0x59fcc556, 0x6d1b6dcf, 0x7eb9f5b8,
    			0x99c0ff45, 0x8a626732, 0xbe85cfab, 0xad2757dc,
    			0xd74a9e99, 0xc4e806ee, 0xf00fae77, 0xe3ad3600,
    			0x3b11cd7c, 0x28b3550b, 0x1c54fd92, 0x0ff665e5,
    			0x759baca0, 0x663934d7, 0x52de9c4e, 0x417c0439,
    			0xa6050ec4, 0xb5a796b3, 0x81403e2a, 0x92e2a65d,
    			0xe88f6f18, 0xfb2df76f, 0xcfca5ff6, 0xdc68c781,
    			0x7b5fdfff, 0x68fd4788, 0x5c1aef11, 0x4fb87766,
    			0x35d5be23, 0x26772654, 0x12908ecd, 0x013216ba,
    			0xe64b1c47, 0xf5e98430, 0xc10e2ca9, 0xd2acb4de,
    			0xa8c17d9b, 0xbb63e5ec, 0x8f844d75, 0x9c26d502,
    			0x449a2e7e, 0x5738b609, 0x63df1e90, 0x707d86e7,
    			0x0a104fa2, 0x19b2d7d5, 0x2d557f4c, 0x3ef7e73b,
    			0xd98eedc6, 0xca2c75b1, 0xfecbdd28, 0xed69455f,
    			0x97048c1a, 0x84a6146d, 0xb041bcf4, 0xa3e32483
    		};
    
    		static const uint32_t table2_[256] = 
    		{
    			0x00000000, 0xa541927e, 0x4f6f520d, 0xea2ec073,
    			0x9edea41a, 0x3b9f3664, 0xd1b1f617, 0x74f06469,
    			0x38513ec5, 0x9d10acbb, 0x773e6cc8, 0xd27ffeb6,
    			0xa68f9adf, 0x03ce08a1, 0xe9e0c8d2, 0x4ca15aac,
    			0x70a27d8a, 0xd5e3eff4, 0x3fcd2f87, 0x9a8cbdf9,
    			0xee7cd990, 0x4b3d4bee, 0xa1138b9d, 0x045219e3,
    			0x48f3434f, 0xedb2d131, 0x079c1142, 0xa2dd833c,
    			0xd62de755, 0x736c752b, 0x9942b558, 0x3c032726,
    			0xe144fb14, 0x4405696a, 0xae2ba919, 0x0b6a3b67,
    			0x7f9a5f0e, 0xdadbcd70, 0x30f50d03, 0x95b49f7d,
    			0xd915c5d1, 0x7c5457af, 0x967a97dc, 0x333b05a2,
    			0x47cb61cb, 0xe28af3b5, 0x08a433c6, 0xade5a1b8,
    			0x91e6869e, 0x34a714e0, 0xde89d493, 0x7bc846ed,
    			0x0f382284, 0xaa79b0fa, 0x40577089, 0xe516e2f7,
    			0xa9b7b85b, 0x0cf62a25, 0xe6d8ea56, 0x43997828,
    			0x37691c41, 0x92288e3f, 0x78064e4c, 0xdd47dc32,
    			0xc76580d9, 0x622412a7, 0x880ad2d4, 0x2d4b40aa,
    			0x59bb24c3, 0xfcfab6bd, 0x16d476ce, 0xb395e4b0,
    			0xff34be1c, 0x5a752c62, 0xb05bec11, 0x151a7e6f,
    			0x61ea1a06, 0xc4ab8878, 0x2e85480b, 0x8bc4da75,
    			0xb7c7fd53, 0x12866f2d, 0xf8a8af5e, 0x5de93d20,
    			0x29195949, 0x8c58cb37, 0x66760b44, 0xc337993a,
    			0x8f96c396, 0x2ad751e8, 0xc0f9919b, 0x65b803e5,
    			0x1148678c, 0xb409f5f2, 0x5e273581, 0xfb66a7ff,
    			0x26217bcd, 0x8360e9b3, 0x694e29c0, 0xcc0fbbbe,
    			0xb8ffdfd7, 0x1dbe4da9, 0xf7908dda, 0x52d11fa4,
    			0x1e704508, 0xbb31d776, 0x511f1705, 0xf45e857b,
    			0x80aee112, 0x25ef736c, 0xcfc1b31f, 0x6a802161,
    			0x56830647, 0xf3c29439, 0x19ec544a, 0xbcadc634,
    			0xc85da25d, 0x6d1c3023, 0x8732f050, 0x2273622e,
    			0x6ed23882, 0xcb93aafc, 0x21bd6a8f, 0x84fcf8f1,
    			0xf00c9c98, 0x554d0ee6, 0xbf63ce95, 0x1a225ceb,
    			0x8b277743, 0x2e66e53d, 0xc448254e, 0x6109b730,
    			0x15f9d359, 0xb0b84127, 0x5a968154, 0xffd7132a,
    			0xb3764986, 0x1637dbf8, 0xfc191b8b, 0x595889f5,
    			0x2da8ed9c, 0x88e97fe2, 0x62c7bf91, 0xc7862def,
    			0xfb850ac9, 0x5ec498b7, 0xb4ea58c4, 0x11abcaba,
    			0x655baed3, 0xc01a3cad, 0x2a34fcde, 0x8f756ea0,
    			0xc3d4340c, 0x6695a672, 0x8cbb6601, 0x29faf47f,
    			0x5d0a9016, 0xf84b0268, 0x1265c21b, 0xb7245065,
    			0x6a638c57, 0xcf221e29, 0x250cde5a, 0x804d4c24,
    			0xf4bd284d, 0x51fcba33, 0xbbd27a40, 0x1e93e83e,
    			0x5232b292, 0xf77320ec, 0x1d5de09f, 0xb81c72e1,
    			0xccec1688, 0x69ad84f6, 0x83834485, 0x26c2d6fb,
    			0x1ac1f1dd, 0xbf8063a3, 0x55aea3d0, 0xf0ef31ae,
    			0x841f55c7, 0x215ec7b9, 0xcb7007ca, 0x6e3195b4,
    			0x2290cf18, 0x87d15d66, 0x6dff9d15, 0xc8be0f6b,
    			0xbc4e6b02, 0x190ff97c, 0xf321390f, 0x5660ab71,
    			0x4c42f79a, 0xe90365e4, 0x032da597, 0xa66c37e9,
    			0xd29c5380, 0x77ddc1fe, 0x9df3018d, 0x38b293f3,
    			0x7413c95f, 0xd1525b21, 0x3b7c9b52, 0x9e3d092c,
    			0xeacd6d45, 0x4f8cff3b, 0xa5a23f48, 0x00e3ad36,
    			0x3ce08a10, 0x99a1186e, 0x738fd81d, 0xd6ce4a63,
    			0xa23e2e0a, 0x077fbc74, 0xed517c07, 0x4810ee79,
    			0x04b1b4d5, 0xa1f026ab, 0x4bdee6d8, 0xee9f74a6,
    			0x9a6f10cf, 0x3f2e82b1, 0xd50042c2, 0x7041d0bc,
    			0xad060c8e, 0x08479ef0, 0xe2695e83, 0x4728ccfd,
    			0x33d8a894, 0x96993aea, 0x7cb7fa99, 0xd9f668e7,
    			0x9557324b, 0x3016a035, 0xda386046, 0x7f79f238,
    			0x0b899651, 0xaec8042f, 0x44e6c45c, 0xe1a75622,
    			0xdda47104, 0x78e5e37a, 0x92cb2309, 0x378ab177,
    			0x437ad51e, 0xe63b4760, 0x0c158713, 0xa954156d,
    			0xe5f54fc1, 0x40b4ddbf, 0xaa9a1dcc, 0x0fdb8fb2,
    			0x7b2bebdb, 0xde6a79a5, 0x3444b9d6, 0x91052ba8
    		};
    
    		static const uint32_t table3_[256] = 
    		{
    			0x00000000, 0xdd45aab8, 0xbf672381, 0x62228939,
    			0x7b2231f3, 0xa6679b4b, 0xc4451272, 0x1900b8ca,
    			0xf64463e6, 0x2b01c95e, 0x49234067, 0x9466eadf,
    			0x8d665215, 0x5023f8ad, 0x32017194, 0xef44db2c,
    			0xe964b13d, 0x34211b85, 0x560392bc, 0x8b463804,
    			0x924680ce, 0x4f032a76, 0x2d21a34f, 0xf06409f7,
    			0x1f20d2db, 0xc2657863, 0xa047f15a, 0x7d025be2,
    			0x6402e328, 0xb9474990, 0xdb65c0a9, 0x06206a11,
    			0xd725148b, 0x0a60be33, 0x6842370a, 0xb5079db2,
    			0xac072578, 0x71428fc0, 0x136006f9, 0xce25ac41,
    			0x2161776d, 0xfc24ddd5, 0x9e0654ec, 0x4343fe54,
    			0x5a43469e, 0x8706ec26, 0xe524651f, 0x3861cfa7,
    			0x3e41a5b6, 0xe3040f0e, 0x81268637, 0x5c632c8f,
    			0x45639445, 0x98263efd, 0xfa04b7c4, 0x27411d7c,
    			0xc805c650, 0x15406ce8, 0x7762e5d1, 0xaa274f69,
    			0xb327f7a3, 0x6e625d1b, 0x0c40d422, 0xd1057e9a,
    			0xaba65fe7, 0x76e3f55f, 0x14c17c66, 0xc984d6de,
    			0xd0846e14, 0x0dc1c4ac, 0x6fe34d95, 0xb2a6e72d,
    			0x5de23c01, 0x80a796b9, 0xe2851f80, 0x3fc0b538,
    			0x26c00df2, 0xfb85a74a, 0x99a72e73, 0x44e284cb,
    			0x42c2eeda, 0x9f874462, 0xfda5cd5b, 0x20e067e3,
    			0x39e0df29, 0xe4a57591, 0x8687fca8, 0x5bc25610,
    			0xb4868d3c, 0x69c32784, 0x0be1aebd, 0xd6a40405,
    			0xcfa4bccf, 0x12e11677, 0x70c39f4e, 0xad8635f6,
    			0x7c834b6c, 0xa1c6e1d4, 0xc3e468ed, 0x1ea1c255,
    			0x07a17a9f, 0xdae4d027, 0xb8c6591e, 0x6583f3a6,
    			0x8ac7288a, 0x57828232, 0x35a00b0b, 0xe8e5a1b3,
    			0xf1e51979, 0x2ca0b3c1, 0x4e823af8, 0x93c79040,
    			0x95e7fa51, 0x48a250e9, 0x2a80d9d0, 0xf7c57368,
    			0xeec5cba2, 0x3380611a, 0x51a2e823, 0x8ce7429b,
    			0x63a399b7, 0xbee6330f, 0xdcc4ba36, 0x0181108e,
    			0x1881a844, 0xc5c402fc, 0xa7e68bc5, 0x7aa3217d,
    			0x52a0c93f, 0x8fe56387, 0xedc7eabe, 0x30824006,
    			0x2982f8cc, 0xf4c75274, 0x96e5db4d, 0x4ba071f5,
    			0xa4e4aad9, 0x79a10061, 0x1b838958, 0xc6c623e0,
    			0xdfc69b2a, 0x02833192, 0x60a1b8ab, 0xbde41213,
    			0xbbc47802, 0x6681d2ba, 0x04a35b83, 0xd9e6f13b,
    			0xc0e649f1, 0x1da3e349, 0x7f816a70, 0xa2c4c0c8,
    			0x4d801be4, 0x90c5b15c, 0xf2e73865, 0x2fa292dd,
    			0x36a22a17, 0xebe780af, 0x89c50996, 0x5480a32e,
    			0x8585ddb4, 0x58c0770c, 0x3ae2fe35, 0xe7a7548d,
    			0xfea7ec47, 0x23e246ff, 0x41c0cfc6, 0x9c85657e,
    			0x73c1be52, 0xae8414ea, 0xcca69dd3, 0x11e3376b,
    			0x08e38fa1, 0xd5a62519, 0xb784ac20, 0x6ac10698,
    			0x6ce16c89, 0xb1a4c631, 0xd3864f08, 0x0ec3e5b0,
    			0x17c35d7a, 0xca86f7c2, 0xa8a47efb, 0x75e1d443,
    			0x9aa50f6f, 0x47e0a5d7, 0x25c22cee, 0xf8878656,
    			0xe1873e9c, 0x3cc29424, 0x5ee01d1d, 0x83a5b7a5,
    			0xf90696d8, 0x24433c60, 0x4661b559, 0x9b241fe1,
    			0x8224a72b, 0x5f610d93, 0x3d4384aa, 0xe0062e12,
    			0x0f42f53e, 0xd2075f86, 0xb025d6bf, 0x6d607c07,
    			0x7460c4cd, 0xa9256e75, 0xcb07e74c, 0x16424df4,
    			0x106227e5, 0xcd278d5d, 0xaf050464, 0x7240aedc,
    			0x6b401616, 0xb605bcae, 0xd4273597, 0x09629f2f,
    			0xe6264403, 0x3b63eebb, 0x59416782, 0x8404cd3a,
    			0x9d0475f0, 0x4041df48, 0x22635671, 0xff26fcc9,
    			0x2e238253, 0xf36628eb, 0x9144a1d2, 0x4c010b6a,
    			0x5501b3a0, 0x88441918, 0xea669021, 0x37233a99,
    			0xd867e1b5, 0x05224b0d, 0x6700c234, 0xba45688c,
    			0xa345d046, 0x7e007afe, 0x1c22f3c7, 0xc167597f,
    			0xc747336e, 0x1a0299d6, 0x782010ef, 0xa565ba57,
    			0xbc65029d, 0x6120a825, 0x0302211c, 0xde478ba4,
    			0x31035088, 0xec46fa30, 0x8e647309, 0x5321d9b1,
    			0x4a21617b, 0x9764cbc3, 0xf54642fa, 0x2803e842
    		};
    
    		// Used to fetch a naturally-aligned 32-bit word in little endian byte-order
    		static inline uint32_t LE_LOAD32(const uint8_t *p) 
    		{
    			return DecodeFixed32(reinterpret_cast<const char*>(p));
    		}
    
    		uint32_t Extend(uint32_t crc, const char* buf, size_t size)
    		{
    			const uint8_t *p = reinterpret_cast<const uint8_t *>(buf);
    			const uint8_t *e = p + size;
    			uint32_t l = crc ^ 0xffffffffu;
    
    #define STEP1 do {                              \
    	int c = (l & 0xff) ^ *p++;                  \
    	l = table0_[c] ^ (l >> 8);                  \
    			} while (0)
    #define STEP4 do {                              \
    	uint32_t c = l ^ LE_LOAD32(p);              \
    	p += 4;                                     \
    	l = table3_[c & 0xff] ^                     \
    	table2_[(c >> 8) & 0xff] ^              \
    	table1_[(c >> 16) & 0xff] ^             \
    	table0_[c >> 24];                       \
    			} while (0)
    
    			// Point x at first 4-byte aligned byte in string.  This might be
    			// just past the end of the string.
    			const uintptr_t pval = reinterpret_cast<uintptr_t>(p);
    			// p 为0时,x为0;p为1-4,x为4;p为5-8时,x为8;将p向上取整到最近的4的整数倍x
    			const uint8_t* x = reinterpret_cast<const uint8_t*>(((pval + 3) >> 2) << 2);
    			if ( x <= e )
    			{
    				//  先处理到最近的4个整数倍的那几个字节
    				// Process bytes until finished or p is 4-byte aligned
    				while ( p != x ) 
    				{
    					STEP1;
    				}
    			}
    			// 后面都是4字节对齐的,16个16个字节(4个4个int)的处理
    			// Process bytes 16 at a time
    			while ( ( e - p ) >= 16 ) 
    			{
    				STEP4STEP4STEP4STEP4;
    			}
    			// 剩下的字节不足16个,则4个字节4个字节的处理
    			// Process bytes 4 at a time
    			while ( ( e - p ) >= 4 )
    			{
    				STEP4;
    			}
    			// 剩下的字节不足4个,一个一个的处理
    			// Process the last few bytes
    			while ( p != e )
    			{
    				STEP1;
    			}
    #undef STEP4
    #undef STEP1
    			return l ^ 0xffffffffu;
    		}
    
    	}  // namespace crc32c
    }  // namespace leveldb
    
    
    展开全文
  • nim-crc32:Nim的CRC32
  • CRC32-源码

    2021-03-17 16:20:17
    CRC32
  • Crc32是使用crc32算法的Visual Basic 6项目。
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  • <div><p><code>crc32</code> and <code>crc32_combine</code> are required for reading and writing ZIP files. It would be nice if they are exported by flate2. The alternative for implementations is to use...
  • <p>In the arm case, there are two candidates: crc32-arm-ce and crc32_generic, (both using crc32 module alias) but only the former is included by default in the initramfs by dracut. Unfortunately, this...
  • java zip crc32_CRC32 Class

    2021-03-09 04:54:31
    CRC32 ClassDefinitionAssembly:Mono.Android.dllThe CRC32 class is used to compute a CRC32 checksum from data provided asinput value.In this article[Android.Runtime.Register("java/util/zip/CRC32", ApiSi...
  • 各种CRC源码 CRC8 CRC16 CRC32 CRCCCITT CRCDNP CRCKRMIT CRCSICK NMEA_CHK
  • 一、CRC32概念CRC全称为Cyclic Redundancy Check,又叫循环冗余校验。CRC32是CRC算法的一种,常用于校验网络上传输的文件。二:MySQL里如何利用CRC32来加快查询???CRC32的基本特征#1.CRC32函数返回值的范围是0-...
  • 我参考的地址:http://www.jdzj.com/data/program/1755.htm下面是我的理解:感觉,crc32 的用途,就是生成一个唯一的值。...CRC32 crc = new CRC32();crc.update(DivisionType.getBytes());crc.get...
  • 易语言CRC32校验源码

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    易语言CRC32校验源码,CRC32校验,生成CRC32表,取CRC32,取CRC322

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