C++ Boost-CRC和linux/lib/CRC-ccitt.c的区别

我有两个来源来计算看似相同的crc值。 我不明白为什么“boost/crc.hpp”实现与“linux/lib/crc ccitt.c”实现不同

这里有一个例子说明了这个问题。 因为我的计算机上没有Linux内核源代码，所以它稍微长了一点。 如果将boost链接到它，它就会编译

问题是Linux和boost在crc值上不一致。 Linux源代码声明：

• 多项式。。。0x8408
• 添加隐式x^16，就得到了标准的CRC-CCITT

我不知道如何应用x^16，但我会编辑这个问题以反映偏差多项式

#include <stdio.h>
#include <boost\crc.hpp>

typedef unsigned short u16;
typedef unsigned char u8;

/*
*   linux/lib/crc-ccitt.c
*
*   This source code is licensed under the GNU General Public License,
*   Version 2. See the file COPYING for more details.
*/

/*modified for minimal example on stackoverflow*/
/*original source from http://mirrors.neusoft.edu.cn/rpi-kernel/lib/crc-ccitt.c */

u16 const crc_ccitt_table[256] = {
    0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
    0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
    0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
    0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
    0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
    0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
    0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
    0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
    0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
    0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
    0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
    0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
    0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
    0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
    0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
    0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
    0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
    0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
    0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
    0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
    0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
    0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
    0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
    0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
    0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
    0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
    0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
    0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
    0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
    0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
    0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
    0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
};

//from crc-ccitt.h
static inline u16 crc_ccitt_byte(u16 crc, const u8 c)
{
    return (crc >> 8) ^ crc_ccitt_table[(crc ^ c) & 0xff];
}

u16 crc_ccitt(u16 crc, u8 const *buffer, size_t len)
{
    while (len--)
        crc = crc_ccitt_byte(crc, *buffer++);
    return crc;
}

#define check(X, Y) \
if (X != Y) { \
    printf("%s !=  %s\n", #X, #Y); \
} else { \
    printf("%s ==  %s   !!! celebrate\n", #X, #Y); \
} 

void runTestSet(unsigned char * data, unsigned size)
{
    u16 linux = crc_ccitt(0xFFFF, data, size);

    boost::crc_ccitt_type boost_crc_ccitt_type;
    boost::crc_16_type boost_crc_16_type;
    boost::crc_32_type boost_crc_32_type;
    boost::crc_xmodem_type boost_crc_xmodem_type;
    boost::crc_optimal<16, 0x8408, 0xFFFF, 0, false, false> boost_crc_optimal_16_8408_FFFF_0_0_0;
    boost::crc_optimal<16, 0x8408, 0xFFFF, 0, true, true> boost_crc_optimal_16_8408_FFFF_0_1_1;
    boost::crc_optimal<16, 0xA001, 0xFFFF, 0, true, true> boost_crc_optimal_16_A001_FFFF_0_1_1;
    boost::crc_optimal<16, 0x8408, 0xFFFF, 0, true, false> boost_crc_optimal_16_8408_FFFF_0_1_0;
    boost::crc_optimal<16, 0x856F, 0xFFFF, 0, true, true> boost_crc_optimal_16_856F_FFFF_0_1_1;
    boost::crc_optimal<16, 0x856F, 0xFFFF, 0, true, false> boost_crc_optimal_16_856F_FFFF_0_1_0;

    boost_crc_ccitt_type.process_bytes(data, size);
    boost_crc_16_type.process_bytes(data, size);
    boost_crc_32_type.process_bytes(data, size);
    boost_crc_xmodem_type.process_bytes(data, size);
    boost_crc_optimal_16_8408_FFFF_0_0_0.process_bytes(data, size);
    boost_crc_optimal_16_8408_FFFF_0_1_1.process_bytes(data, size);
    boost_crc_optimal_16_A001_FFFF_0_1_1.process_bytes(data, size);
    boost_crc_optimal_16_8408_FFFF_0_1_0.process_bytes(data, size);
    boost_crc_optimal_16_856F_FFFF_0_1_1.process_bytes(data, size);
    boost_crc_optimal_16_856F_FFFF_0_1_0.process_bytes(data, size);

    printf("Testing with sequence: '");
    for (unsigned n = 0; n < size; ++n)
    {
        if (n > 0) printf(" ");
        printf("0x%02X", data[n]);
    }
    printf("'\n");
    check(boost_crc_ccitt_type.checksum(), linux);
    check(boost_crc_16_type.checksum(), linux);
    check(boost_crc_32_type.checksum(), linux);
    check(boost_crc_xmodem_type.checksum(), linux);
    check(boost_crc_optimal_16_8408_FFFF_0_0_0.checksum(), linux);
    check(boost_crc_optimal_16_8408_FFFF_0_1_1.checksum(), linux);
    check(boost_crc_optimal_16_A001_FFFF_0_1_1.checksum(), linux);
    check(boost_crc_optimal_16_8408_FFFF_0_1_0.checksum(), linux);
    check(boost_crc_optimal_16_856F_FFFF_0_1_1.checksum(), linux);
    check(boost_crc_optimal_16_856F_FFFF_0_1_0.checksum(), linux);
    printf("End Of Testrun\n\n");
}


int main()
{
    unsigned char simple[] = {0x80};
    unsigned char sequence[] = "123456789";
    runTestSet(simple, sizeof(simple));
    runTestSet(sequence, sizeof(sequence));
    return 0;
}

#包括
#包括
typedef无符号短u16；
typedef无符号字符u8；
/*
*linux/lib/crc-ccitt.c
*
*此源代码根据GNU通用公共许可证进行许可，
*版本2。有关详细信息，请参阅文件复制。
*/
/*修改了stackoverflow的最小示例*/
/*原始来源http://mirrors.neusoft.edu.cn/rpi-kernel/lib/crc-ccitt.c */
u16常量crc\U ccitt\U表[256]={
0x0000、0x1189、0x2312、0x329b、0x4624、0x57ad、0x6536、0x74bf、，
0x8c48、0x9dc1、0xaf5a、0xbed3、0xca6c、0xdbe5、0xe97e、0xf8f7、，
0x1081、0x0108、0x3393、0x221a、0x56a5、0x472c、0x75b7、0x643e、，
0x9cc9、0x8d40、0xbfdb、0xae52、0xdaed、0xcb64、0xf9ff、0xe876、，
0x2102、0x308b、0x0210、0x1399、0x6726、0x76af、0x4434、0x55bd、，
0xad4a、0xbcc3、0x8e58、0x9fd1、0xeb6e、0xfae7、0xc87c、0xd9f5、，
0x3183、0x200a、0x1291、0x0318、0x77a7、0x662e、0x54b5、0x453c、，
0xbdcb、0xac42、0x9ed9、0x8f50、0xfbef、0xea66、0xd8fd、0xc974、，
0x4204、0x538d、0x6116、0x709f、0x0420、0x15a9、0x2732、0x36bb、，
0xce4c、0xdfc5、0xed5e、0xfcd7、0x8868、0x99e1、0xab7a、0xbaf3、，
0x5285、0x430c、0x7197、0x601e、0x14a1、0x0528、0x37b3、0x263a、，
0xdecd、0xcf44、0xfddf、0xec56、0x98e9、0x8960、0xbbfb、0xaa72、，
0x6306、0x728f、0x4014、0x519d、0x2522、0x34ab、0x0630、0x17b9、，
0xef4e、0xfec7、0xcc5c、0xddd5、0xa96a、0xb8e3、0x8a78、0x9bf1、，
0x7387、0x620e、0x5095、0x411c、0x35a3、0x242a、0x16b1、0x0738、，
0xffcf、0xee46、0xdcdd、0xcd54、0xb9eb、0xa862、0x9af9、0x8b70、，
0x8408、0x9581、0xa71a、0xb693、0xc22c、0xd3a5、0xe13e、0xf0b7、，
0x0840、0x19c9、0x2b52、0x3adb、0x4e64、0x5fed、0x6d76、0x7cff、，
0x9489、0x8500、0xb79b、0xa612、0xd2ad、0xc324、0xf1bf、0xe036、，
0x18c1、0x0948、0x3bd3、0x2a5a、0x5ee5、0x4f6c、0x7df7、0x6c7e、，
0xa50a、0xb483、0x8618、0x9791、0xe32e、0xf2a7、0xc03c、0xd1b5、，
0x2942、0x38cb、0x0a50、0x1bd9、0x6f66、0x7eef、0x4c74、0x5dfd、，
0xb58b、0xa402、0x9699、0x8710、0xf3af、0xe226、0xd0bd、0xc134、，
0x39c3、0x284a、0x1ad1、0x0b58、0x7fe7、0x6e6e、0x5cf5、0x4d7c、，
0xc60c、0xd785、0xe51e、0xf497、0x8028、0x91a1、0xa33a、0xb2b3、，
0x4a44、0x5bcd、0x6956、0x78df、0x0c60、0x1de9、0x2f72、0x3efb、，
0xd68d、0xc704、0xf59f、0xe416、0x90a9、0x8120、0xb3bb、0xa232、，
0x5ac5、0x4b4c、0x79d7、0x685e、0x1ce1、0x0d68、0x3ff3、0x2e7a、，
0xe70e、0xf687、0xc41c、0xd595、0xa12a、0xb0a3、0x8238、0x93b1、，
0x6b46、0x7acf、0x4854、0x59dd、0x2d62、0x3ceb、0x0e70、0x1ff9、，
0xf78f、0xe606、0xd49d、0xc514、0xb1ab、0xa022、0x92b9、0x8330、，
0x7bc7、0x6a4e、0x58d5、0x495c、0x3de3、0x2c6a、0x1ef1、0x0f78
};
//来自crc ccitt.h
静态内联u16 crc\U ccitt\U字节（u16 crc，常量u8 c）
{
返回（crc>>8）^crc\U ccitt\U表[（crc^c）&0xff]；
}
u16 crc\U ccitt（u16 crc，u8常量*缓冲区，大小长度）
{
而(len--)
crc=crc_ccitt_字节（crc，*buffer++）；
返回crc；
}
#定义检查（X，Y）\
如果（X！=Y）{\
printf（“%s！=%s\n”，X，#Y）\
}否则{\
printf（“%s==%s！！！庆祝”\n“，#X，#Y）\
} 
void runTestSet（无符号字符*数据，无符号大小）
{
u16 linux=crc\u ccitt（0xFFFF，数据，大小）；
boost：：crc\u ccitt\u类型boost\u crc\u ccitt\u类型；
boost：：crc_16_型boost_crc_16_型；
boost:：crc_32_型boost_crc_32_型；
boost:：crc_xmodem_类型boost_crc_xmodem_类型；
boost：：crc_最优boost_crc_最优_16_8408_FFFF_0_0；
boost：：crc_最优boost_crc_最优_16_8408_FFFF_0_1_1；
boost:：crc_最优boost_crc_最优_16_A001_FFFF_0_1_1；
boost：：crc_最优boost_crc_最优_16_8408_FFFF_0_1_0；
boost：：crc_最优boost_crc_最优_16_856F_FFFF_0_1_1；
boost：：crc_最优boost_crc_最优_16_856F_FFFF_0_1_0；
boost\u crc\u ccitt\u类型。处理字节（数据、大小）；
boost_crc_16_类型。处理字节（数据、大小）；
boost_crc_32_类型。处理字节（数据、大小）；
boost\u crc\u xmodem\u类型。处理字节（数据、大小）；
boost_crc_最优_16_8408_FFFF_0_0_0。处理_字节（数据、大小）；
boost_crc_optimal_16_8408_FFFF_0_1_1.处理字节（数据、大小）；
boost_crc_optimal_16_A001_FFFF_0_1_1.处理字节（数据、大小）；
boost_crc_optimal_16_8408_FFFF_0_1_0.处理_字节（数据、大小）；
boost_crc_optimal_16_856F_FFFF_0_1_1.处理字节（数据、大小）；
boost_crc_optimal_16_856F_FFFF_0_1_0.处理字节（数据、大小）；
printf（“序列测试：”）；
用于（无符号n=0；n0）printf（“”）；
printf（“0x%02X”，数据[n]）；
}
printf（“'\n”）；
检查（boost_crc_ccitt_type.checksum（），linux）；
检查（boost_crc_16_type.checksum（），linux）；
检查（boost_crc_32_type.checksum（），linux）；
检查（boost_crc_xmodem_type.checksum（），linux）；
检查（boost_crc_optimal_16_8408_FFFF_0_0.checksum（），linux）；
检查（boost_crc_optimal_16_8408_FFFF_0_1_1.checksum（），linux）；
检查（boost_crc_optimal_16_A001_FFFF_0_1_1.checksum（），linux）；
检查（boost_crc_optimal_16_8408_FFFF_0_1_0.checksum（），linux）；
检查（boost_crc_optimal_16_856F_FFFF_0_1_1.checksum（），linux）；
检查（boost_crc_optimal_16_856F_FFFF_0_1_0.checksum（），linux）；
printf（“测试运行结束\n\n”）；
}
int main（）
{
无符号字符简单[]={0x80}；
无符号字符序列[]=“123456789”；
runTestSet（简单，sizeof（简单））；
runTestSet（序列，sizeof（序列））
typedef crc_optimal<16, 0x1021, 0xFFFF, 0, false, false>  crc_ccitt_type;

    crc << = 1;
    if(crc & 0x10000)crc ^= 0x11021;

    if(crc & 0x8000){crc = ((crc<<1) & 0xffff) & 0x1021;}
    else {crc = ((crc<<1) & 0xffff);}

typedef unsigned short u16;
typedef unsigned char u8;

u16 crctbl[256] = {
    0x0000,0x1021,0x2042,0x3063,0x4084,0x50a5,0x60c6,0x70e7,
    0x8108,0x9129,0xa14a,0xb16b,0xc18c,0xd1ad,0xe1ce,0xf1ef,
    0x1231,0x0210,0x3273,0x2252,0x52b5,0x4294,0x72f7,0x62d6,
    0x9339,0x8318,0xb37b,0xa35a,0xd3bd,0xc39c,0xf3ff,0xe3de,
    0x2462,0x3443,0x0420,0x1401,0x64e6,0x74c7,0x44a4,0x5485,
    0xa56a,0xb54b,0x8528,0x9509,0xe5ee,0xf5cf,0xc5ac,0xd58d,
    0x3653,0x2672,0x1611,0x0630,0x76d7,0x66f6,0x5695,0x46b4,
    0xb75b,0xa77a,0x9719,0x8738,0xf7df,0xe7fe,0xd79d,0xc7bc,
    0x48c4,0x58e5,0x6886,0x78a7,0x0840,0x1861,0x2802,0x3823,
    0xc9cc,0xd9ed,0xe98e,0xf9af,0x8948,0x9969,0xa90a,0xb92b,
    0x5af5,0x4ad4,0x7ab7,0x6a96,0x1a71,0x0a50,0x3a33,0x2a12,
    0xdbfd,0xcbdc,0xfbbf,0xeb9e,0x9b79,0x8b58,0xbb3b,0xab1a,
    0x6ca6,0x7c87,0x4ce4,0x5cc5,0x2c22,0x3c03,0x0c60,0x1c41,
    0xedae,0xfd8f,0xcdec,0xddcd,0xad2a,0xbd0b,0x8d68,0x9d49,
    0x7e97,0x6eb6,0x5ed5,0x4ef4,0x3e13,0x2e32,0x1e51,0x0e70,
    0xff9f,0xefbe,0xdfdd,0xcffc,0xbf1b,0xaf3a,0x9f59,0x8f78,
    0x9188,0x81a9,0xb1ca,0xa1eb,0xd10c,0xc12d,0xf14e,0xe16f,
    0x1080,0x00a1,0x30c2,0x20e3,0x5004,0x4025,0x7046,0x6067,
    0x83b9,0x9398,0xa3fb,0xb3da,0xc33d,0xd31c,0xe37f,0xf35e,
    0x02b1,0x1290,0x22f3,0x32d2,0x4235,0x5214,0x6277,0x7256,
    0xb5ea,0xa5cb,0x95a8,0x8589,0xf56e,0xe54f,0xd52c,0xc50d,
    0x34e2,0x24c3,0x14a0,0x0481,0x7466,0x6447,0x5424,0x4405,
    0xa7db,0xb7fa,0x8799,0x97b8,0xe75f,0xf77e,0xc71d,0xd73c,
    0x26d3,0x36f2,0x0691,0x16b0,0x6657,0x7676,0x4615,0x5634,
    0xd94c,0xc96d,0xf90e,0xe92f,0x99c8,0x89e9,0xb98a,0xa9ab,
    0x5844,0x4865,0x7806,0x6827,0x18c0,0x08e1,0x3882,0x28a3,
    0xcb7d,0xdb5c,0xeb3f,0xfb1e,0x8bf9,0x9bd8,0xabbb,0xbb9a,
    0x4a75,0x5a54,0x6a37,0x7a16,0x0af1,0x1ad0,0x2ab3,0x3a92,
    0xfd2e,0xed0f,0xdd6c,0xcd4d,0xbdaa,0xad8b,0x9de8,0x8dc9,
    0x7c26,0x6c07,0x5c64,0x4c45,0x3ca2,0x2c83,0x1ce0,0x0cc1,
    0xef1f,0xff3e,0xcf5d,0xdf7c,0xaf9b,0xbfba,0x8fd9,0x9ff8,
    0x6e17,0x7e36,0x4e55,0x5e74,0x2e93,0x3eb2,0x0ed1,0x1ef0};

u16 gencrc(u8 *bfr, size_t len)
{
u16 crc = 0xffff;
    while(len--)
        crc = (crc << 8) ^ crctbl[(crc >> 8)^*bfr++];
    return(crc);
}

int main()
{
u16 crc;
u8 a[4]  = {0x80, 0, 0, 0};
u8 b[10] = {"123456789"};
    crc = gencrc(a, 1);   // returns 0x7078
    crc = gencrc(b, 9);   // returns 0x29b1
    return(0);
}

#include <iostream>

unsigned long SwapBits(unsigned long swap, int bits)
{
    unsigned long r = 0;
    for(int i = 0; i < bits; i++) {
        if(swap & 1) r |= 1 << (bits - i - 1);
        swap >>= 1;
    }
    return r;
}

int main()
{
    const unsigned short poly = 0x1021;
    unsigned short CRCTab[256];
    for(int i = 0; i < 256; i++) {
        CRCTab[i] = SwapBits(i, 8) << 8;
        for(int j = 0; j < 8; j++) CRCTab[i] = (CRCTab[i] << 1) ^ ((CRCTab[i] & 0x8000) ? poly : 0);
        CRCTab[i] = SwapBits(CRCTab[i], 16);
    }
    for(int i = 0; i < 256; ) {
        char str[10];
        for(int j = 0; j < 8; j++, i++) {
            sprintf(str, "0x%04x, ", CRCTab[i]);
            std::cout << str;
        }
        std::cout << "\n";
    }
    return 0;
}

#include <stdio.h>
#include <boost\crc.hpp>

typedef unsigned short u16;
typedef unsigned char u8;

/*
*   linux/lib/crc-ccitt.c
*
*   This source code is licensed under the GNU General Public License,
*   Version 2. See the file COPYING for more details.
*/

/*modified for minimal example on stackoverflow*/
/*original source from http://mirrors.neusoft.edu.cn/rpi-kernel/lib/crc-ccitt.c */

u16 const crc_ccitt_table[256] = {
    0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
    0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
    0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
    0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
    0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
    0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
    0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
    0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
    0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
    0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
    0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
    0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
    0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
    0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
    0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
    0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
    0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
    0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
    0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
    0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
    0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
    0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
    0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
    0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
    0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
    0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
    0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
    0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
    0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
    0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
    0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
    0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
};

//from crc-ccitt.h
static inline u16 crc_ccitt_byte(u16 crc, const u8 c)
{
    return (crc >> 8) ^ crc_ccitt_table[(crc ^ c) & 0xff];
}

u16 crc_ccitt(u16 crc, u8 const *buffer, size_t len)
{
    while (len--)
        crc = crc_ccitt_byte(crc, *buffer++);
    return crc;
}

#define check(X, Y) \
if (X != Y) { \
    printf("%s (0x%08X) !=  %s (0x%08X)\n", #X, X, #Y, Y); \
} else { \
    printf("%s (0x%08X) ==  %s (0x%08X)!!! celebrate\n", #X, X, #Y, Y); \
}

void runTestSet(unsigned char * data, unsigned size)
{
    u16 linux = crc_ccitt(0xFFFF, data, size);
    boost::crc_optimal<16, 0x1021, 0xFFFF, 0, true, true> boost_crc_optimal_16_1021_FFFF_0_1_1;
    boost_crc_optimal_16_1021_FFFF_0_1_1.process_bytes(data, size);

    printf("Testing with sequence: '");
    for (unsigned n = 0; n < size; ++n)
    {
        if (n > 0) printf(" ");
        printf("0x%02X", data[n]);
    }
    printf("'\n");
    check(boost_crc_optimal_16_1021_FFFF_0_1_1.checksum(), linux);
    printf("End Of Testrun\n\n");
}


int main()
{
    unsigned char zero_Length[] = {0x00};
    unsigned char simple[] = {0x80};
    unsigned char sequence[] = "123456789";
    unsigned char LotsOfAs[] = "AAAAAAAAAAAAAAAAAAAAAAAAA";
    runTestSet(zero_Length, 0);
    runTestSet(simple, sizeof(simple));
    runTestSet(sequence, sizeof(sequence)-1);
    runTestSet(LotsOfAs, sizeof(LotsOfAs)-1);
    return 0;
}