十六进制转字符串StrToHex，字符串转十六进制HexToStr

// HEXSTR.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include <Windows.h>


/*
// C prototype : void StrToHex(byte *pbDest, char *pszSrc, int nLen)
// parameter(s): [OUT] pbDest - 输出缓冲区
//	[IN] pszSrc - 字符串
//	[IN] nLen - 16进制数的字节数(字符串的长度/2)
// return value:
// remarks : 将字符串转化为16进制数
*/
void StrToHex(byte *pbDest, char *pszSrc, int nLen)
{
	char h1, h2;
	byte s1, s2;
	for (int i = 0; i < nLen; i++)
	{
		h1 = pszSrc[2 * i];
		h2 = pszSrc[2 * i + 1];

		s1 = toupper(h1) - 0x30;
		if (s1 > 9)
			s1 -= 7;

		s2 = toupper(h2) - 0x30;
		if (s2 > 9)
			s2 -= 7;

		pbDest[i] = s1 * 16 + s2;
	}
}

/*
// C prototype : void HexToStr(char *pszDest, byte *pbSrc, int nLen)
// parameter(s): [OUT] pszDest - 存放目标字符串
//	[IN] pbSrc - 输入16进制数的起始地址
//	[IN] nLen - 16进制数的字节数
// return value:
// remarks : 将16进制数转化为字符串
*/
void HexToStr(char *pszDest, byte *pbSrc, int nLen)
{
	char	ddl, ddh;
	for (int i = 0; i < nLen; i++)
	{
		ddh = 48 + pbSrc[i] / 16;
		ddl = 48 + pbSrc[i] % 16;
		if (ddh > 57) ddh = ddh + 7;
		if (ddl > 57) ddl = ddl + 7;
		pszDest[i * 2] = ddh;
		pszDest[i * 2 + 1] = ddl;
	}

	pszDest[nLen * 2] = "";
}

int _tmain(int argc, _TCHAR* argv[])
{
	byte pOut[16] = {0};
	StrToHex(pOut,"00112233445566778899AABBCCDDEEFF",16);

	byte hex[] = {0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF};
	char szOut[33] = {0};
	HexToStr(szOut,hex,16);

	return 0;
}