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;

}