C/C++16進char*とBinary char*の相互変換

1.16進char*回転Binary char*
例えば、「fedcba 9876543210」は、char bin[8]={0 xfe,0 xdc,0 xba,0 x 98,0 x 76,0 x 54,0 x 32,0 x 10}形式に変換される.コード:

/*           ，      1/2*/
static void Hex2Char(char *szHex, unsigned char *rch)
{
    int i;
    for(i=0; i<2; i++)
    {
        if(*(szHex + i) >='0' && *(szHex + i) <= '9')
            *rch = (*rch << 4) + (*(szHex + i) - '0');
        else if(*(szHex + i) >='a' && *(szHex + i) <= 'f')
            *rch = (*rch << 4) + (*(szHex + i) - 'a' + 10);
        else
            break;
    }
}

/*    char*   Binary char*  */
void HexStr2CharStr( char *pszHexStr, int iSize,  char *pucCharStr)
{
    int i;
    unsigned char ch;
    if (iSize%2 != 0) return;
    for(i=0; i<iSize/2; i++)
    {
        Hex2Char(pszHexStr+2*i, &ch);
        pucCharStr[i] = ch;
    }
}

2.Binary char*16進char*
例えば、char bin[8]={0 xfe,0 xdc,0 xba,0 x 98,0 x 76,0 x 54,0 x 32,0 x 10];変換:fedcba 9876543210コード:

/*            ，    2 */
static void Char2Hex(unsigned char ch, char *szHex)
{
    int i;
    unsigned char byte[2];
    byte[0] = ch/16;
    byte[1] = ch%16;
    for(i=0; i<2; i++)
    {
        if(byte[i] >= 0 && byte[i] <= 9)
            szHex[i] = '0' + byte[i];
        else
            szHex[i] = 'a' + byte[i] - 10;
    }
    szHex[2] = 0;
}

/*       ，         */
void CharStr2HexStr( char *pucCharStr, int iSize,  char *pszHexStr)
{
    int i;
    char szHex[3];
    pszHexStr[0] = 0;
    for(i=0; i<iSize; i++)
    {
        Char2Hex(pucCharStr[i], szHex);
        strcat(pszHexStr, szHex);
    }
}