[프로그래밍] Byte order

Network byteorder use big endian so application must handle the byte order in little endian system
here is sample

int getUint32(unsigned char * data, int index)

{

  return ((data[index] & 0xff) << 24) | ((data[index + 1] & 0xff) << 16) | ((data[index + 2] & 0xff) << 8) | (data[index + 3] & 0xff);

}



void setUint32(unsigned char * data, int index, int i)

{

 data[index] = (byte)(0xff & (i >> 24));

 data[index + 1] = (byte)(0xff & (i >> 16));

 data[index + 2] = (byte)(0xff & (i >> 8));

 data[index + 3] = (byte)(0xff & i);

}



int getUint16(unsigned char * data, int index)

{

 return (int)(((data[index] & 0xff) << 8) | (data[index + 1] & 0xff));

}



void setUint16(unsigned char * data, int index, int i)

{

 data[index] = (byte)(i >> 8);

 data[index + 1] = (byte)i;

}