16 進位碼轉換ASCII碼

//----------------------------------------------------------------------<br />//16 進位碼轉換ASCII碼<br />//----------------------------------------------------------------------<br />int HexToAscii(unsigned char* pAscii, unsigned char* pHex, int nHexLen)<br />{<br /> unsigned char* pAscStr = pAscii;<br /> unsigned char* pHexCur = pHex;<br /> unsigned char* pHexEnd = pHexCur + nHexLen;</p><p> while(pHexCur < pHexEnd)<br /> {<br /> //填寫ASCII碼的高4位<br /> if( ('0' <= *pHexCur) && ('9' >= *pHexCur) )<br /> {<br /> *pAscStr = (*pHexCur & 0x0F) << 4;<br /> }<br /> else if( ('A' <= *pHexCur) && ('F' >= *pHexCur) )<br /> {<br /> *pAscStr = (*pHexCur - 'A' + 10) << 4;<br /> }<br /> else if( ('a' <= *pHexCur) && ('f' >= *pHexCur) )<br /> {<br /> *pAscStr = (*pHexCur - 'a' + 10) << 4;<br /> }<br /> pHexCur++;</p><p> //填寫ASCII碼的低4位<br /> if( ('0' <= *pHexCur) && ('9' >= *pHexCur) )<br /> {<br /> *pAscStr += (*pHexCur & 0x0F);<br /> }<br /> else if( ('A' <= *pHexCur) && ('F' >= *pHexCur) )<br /> {<br /> *pAscStr += (*pHexCur - 'A' + 10);<br /> }<br /> else if( ('a' <= *pHexCur) && ('f' >= *pHexCur) )<br /> {<br /> *pAscStr += (*pHexCur - 'a' + 10);<br /> }<br /> pHexCur++;</p><p> pAscStr++;<br /> }</p><p> return (int)(nHexLen / 2);<br />}