常用各种数据校验方法源代码

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 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

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

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; }