C/C++字符串转字节流

C/C++字符串转字节流

/**

• 字符串转字节流

• @param source 输入字符串 dest 输出字符串 sourceLen 输入字符串长度
  /
  void myTools::HexStrToByte(const char source, unsigned char* dest, int sourceLen)
  {
  short i;
  unsigned char highByte, lowByte;

  for (i = 0; i < sourceLen; i += 2)
  {
  highByte = toupper(source[i]);
  lowByte = toupper(source[i + 1]);

    if (highByte > 0x39)
        highByte -= 0x37;
    else
        highByte -= 0x30;
  
    if (lowByte > 0x39)
        lowByte -= 0x37;
    else
        lowByte -= 0x30;
  
    dest[i / 2] = (highByte << 4) | lowByte;
  

  }
  return ;
  }