public.cpp

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#include "stdafx.h"
#include "public.h"
//--------------转换数据为十六进制字符串-------------------------
CString ConverBufToHex(const unsigned char * buf , int len)
{
	CString ret;
	int i = 0;
    char tmp[10];
	tmp[2] = 0;
    for(i = 0 ; i < len; i++)
    { 
		itoa((int)(buf[i] & 0xff) , tmp , 16); 
		if(tmp[1] == 0)
		{
			tmp[1] = tmp[0];
			tmp[0] = '0';
		}
		ret = ret + tmp + " ";
    } 		

	ret.MakeUpper();
	return ret;
}
//----------------------把十六进制数转换为实际数据-----------------÷
int ConverHexToBuff(CString &HexStr , unsigned char * Buf , int BuffLen)
{
	CString ret;
    int len = HexStr.GetLength(); 
	int i = 0,j = 0;
	
	char *PStr ;
	PStr = HexStr.GetBuffer(0);
    char tmp[10];
	tmp[2] = 0;

    for(i = 0 ; i < len - 1 && BuffLen > 0; i++)
    if( (PStr[i] >='0' && PStr[i] <= '9' || 
		PStr[i] >='a' && PStr[i] <= 'f' ||
		PStr[i] >='A' && PStr[i] <= 'F') &&
		(PStr[i+1] >='0' && PStr[i+1] <= '9' || 
		 PStr[i+1] >='A' && PStr[i+1] <= 'F' ||
		 PStr[i+1] >='a' && PStr[i+1] <= 'f'))
	{ 
		tmp[0] = PStr[i];
		tmp[1] = PStr[i+1];
		Buf[j] = (char)(strtol(tmp,NULL,16) & 0xff);
		j++;
		i++;
		BuffLen--;
    }
	return j;
};
//-----------根据传入的数据生成效验字节-----------------
unsigned char MakeVerify(unsigned char * Buf , int Len)
{
	unsigned char even = 0;

	for(int i = 0 ; i < Len ; i++)
		even = even ^ Buf[i];
	
	return even;
}
//----------------------效验数据-----------------------
bool VerifyData(unsigned char * Buf , int Len , unsigned char verify)
{
	unsigned char even = 0;

	even = MakeVerify(Buf , Len);

	if(even != verify)
		return false;
	
	return true;
}