C# 빅엔디안 처리 - C# Convert big-endian to variable

버퍼에 빅엔디안으로 데이터가 있고 이것을 변수에 담아야 할때 아래 코드를 사용하면 된다.

 private uint ConvertBigEndianUInt(byte[] buffer, int offset)  
 {  
   uint ret = (uint)(buffer[offset] << 24);  
   ret |= (uint)(buffer[offset + 1] << 16);  
   ret |= (uint)(buffer[offset + 2] << 8);  
   ret |= (uint)(buffer[offset + 3]);  
   return ret;  
 }  
   
 private ushort ConvertBigEndianUShort(byte[] buffer, int offset)  
 {  
   ushort ret = (ushort)(buffer[offset] << 8);  
   ret |= (ushort)(buffer[offset + 1]);  
   return ret;  
 }  
 
 private long ConvertBigEndianLong(byte[] buffer, int offset)
 {
   long ret = (long)(buffer[offset] << 56);
   ret |= (long)(buffer[offset + 1] << 48);
   ret |= (long)(buffer[offset + 2] << 40);
   ret |= (long)(buffer[offset + 3] << 32);
   ret |= (long)(buffer[offset + 4] << 24);
   ret |= (long)(buffer[offset + 5] << 16);
   ret |= (long)(buffer[offset + 6] << 8);
   ret |= (long)(buffer[offset + 7]);
   return ret;
 }