C语言版的16进制与字符串互转函数

http://www.cnblogs.com/nio-nio/p/3309367.html

/*

// C prototype : void StrToHex(BYTE *pbDest, BYTE *pbSrc, int nLen)

// parameter(s): [OUT] pbDest - 输出缓冲区

//    [IN] pbSrc - 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, BYTE *pbSrc, int nLen)

{

char h1,h2;

BYTE s1,s2;

int i;

for (i=; i<nLen; i++)

{

h1 = pbSrc[*i];

h2 = pbSrc[*i+];

s1 = toupper(h1) - 0x30;

if (s1 > )

s1 -= ;

s2 = toupper(h2) - 0x30;

if (s2 > )

s2 -= ;

pbDest[i] = s1* + s2;

}

}

/*

// C prototype : void HexToStr(BYTE *pbDest, BYTE *pbSrc, int nLen)

// parameter(s): [OUT] pbDest - 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(BYTE *pbDest, BYTE *pbSrc, int nLen)

{

char    ddl,ddh;

int i;

for (i=; i<nLen; i++)

{

ddh =  + pbSrc[i] / ;

ddl =  + pbSrc[i] % ;

if (ddh > ) ddh = ddh + ;

if (ddl > ) ddl = ddl + ;

pbDest[i*] = ddh;

pbDest[i*+] = ddl;

}

pbDest[nLen*] = '\0';

}