各种常用校验方法的源代码

常用各种数据校验方法源代码Borland C++ Builder5.0

//-----------------------------------------------------------------------------

//定义数据类型缩写形式

typedef unsigned char  uchar;              //无符号字符

typedef unsigned short ushort;             //无符号短整型

typedef unsigned long  ulong;              //无符号长整型

typedef unsigned int   uint;               //无符号整型

typedef DynamicArray<Byte> TByteDynArray;  //动态定义字节数组

//CRC8位校验

uchar CRC8Valid(const uchar* puchData, int len)

{

    uchar crc8 = 0;

    while (len--)

    {

        crc8 = crc8 ^ (*puchData++);

    }   

    return crc8;

}

//---------------------------------------------------------------------------

//CRC8位校验

uchar CRC8Valid(const TByteDynArray puchData, int len)

{

    uchar crc8 = 0;

    int index = 0;

    while (len--)

    {

        crc8 = crc8 ^ puchData[index++];

    }

    return crc8;

}

//---------------------------------------------------------------------------

//和校验

uchar SumValid(const uchar* puchData, int len)

{

    uchar crc8 = 0;

    while (len--)

    {

        crc8 = crc8 + (*puchData++);

    }

    return crc8;

}

//---------------------------------------------------------------------------

//和校验

uchar SumValid(const TByteDynArray puchData, int len)

{

    uchar crc8 = 0;

    int index = 0;

    while (len--)

    {

        crc8 = crc8 + puchData[index++];

    }

    return crc8;

}

//---------------------------------------------------------------------------

//从第index位开始进行校验

uchar SumValid(const uchar* puchData, int index,int len)

{

    uchar crc8 = 0;

    puchData+=index;

    while (len--)

    {

        crc8 = crc8 + (*puchData++);

    }

    return crc8;

}

//---------------------------------------------------------------------------

//从第index位开始进行校验

uchar SumValid(const TByteDynArray puchData, int index,int len)

{

    uchar crc8 = 0;

    int indexs = 0;

    indexs+=index;

    while (len--)

    {

        crc8 = crc8 + puchData[indexs++];

    }

    return crc8;

}

//---------------------------------------------------------------------------

//CRC16校验

ushort CRC16Valid(const TByteDynArray buffer, int len)

{

    ushort crc = 0, tmp;

    int index = 0;

    while(len--)

    {

        tmp = buffer[index++];

        crc = crc ^ (tmp << 8);

        for (int i = 0; i < 8; i++)

        {

            if (crc & 0x8000)

                crc = (crc << 1) ^ 0x1021;

            else

                crc <<= 1;

        }

    }

    crc = (crc >> 8) | (crc << 8);

    return(crc);

}

//---------------------------------------------------------------------------

//CRC16校验

ushort CRC16Valid(const uchar* buffer, int len)

{

    ushort crc = 0, tmp;

    while(len--)

    {

        tmp = *buffer++;

        crc = crc ^ (tmp << 8);

        for (int i = 0; i < 8; i++)

        {

            if (crc & 0x8000)

                crc = (crc << 1) ^ 0x1021;

            else

                crc <<= 1;

        }

    }

    crc = (crc >> 8) | (crc << 8);

    return(crc);

}

//------------------------------------------------------------------------------

//异或校验

void XORValid(const TByteDynArray buffer, int len)

{

    char checksum = 0, cr = 13, ln = 10;

    char ch1,c1; //校验位的高四位和第四位

    for (int i = 0;  i<len;  i++)

    {

        checksum = checksum ^ buffer[i+1]; //进行异或交验取值

    }

    ch1 = (checksum  >> 4) & 0x0F;  //取高位数；

    c1 = checksum & 0x0F;  //取低位数；

    if (ch1 < 10) //低于10的数

        ch1 = ch1  +  '0';

    else

        ch1 = (ch1 - 10 ) +  'A'; //不低于10的16进制数，如：A、B、C、D、E、F

    if (c1 < 10)

        c1 = c1  +  '0';

    else

        c1 = (c1 - 10 )+  'A';

   XOR_High=ch1;

   XOR_Low =c1;

}

//-----------------------------------------------------------------------------

//异或校验

void XORValid(const uchar* buffer, int len)

{

    char checksum = 0, cr = 13, ln = 10;

    char ch1,c1; //校验位的高四位和第四位

    for (int i = 0;  i<len;  i++)

    {

        checksum = checksum ^ buffer[i+1]; //进行异或交验取值

    }

    ch1 = (checksum  >> 4) & 0x0F;  //取高位数；

    c1 = checksum & 0x0F;  //取低位数；

    if (ch1 < 10) //低于10的数

        ch1 = ch1  +  '0';

    else

        ch1 = (ch1 - 10 ) +  'A'; //不低于10的16进制数，如：A、B、C、D、E、F

    if (c1 < 10)

        c1 = c1  +  '0';

    else

        c1 = (c1 - 10 )+  'A';

    XOR_High=ch1;

    XOR_Low =c1;

}