CaVM/include/BigEndian.h

#ifndef __JAVA_PARSER_BIG_ENDIAN_H
#define __JAVA_PARSER_BIG_ENDIAN_H

#include <Types.h>
#include <cstddef>

#ifdef _MSC_VER

#include <intrin.h>

#define __builtin_bswap16 _byteswap_ushort
#define __builtin_bswap32 _byteswap_ulong
#define __builtin_bswap64 _byteswap_uint64

#endif


template <typename T>
class BigEndian
{
  public:
	ALWAYS_INLINE BigEndian(T val)
	{
		_val = val;
	}
	ALWAYS_INLINE BigEndian()
	{
	}

	ALWAYS_INLINE T ToHostFormat()
	{
		return ToHostFormat(_val);
    }

	ALWAYS_INLINE T ToHostFormat(T val)
	{
		switch (sizeof(T))
		{
			case 1:
				return val;
			case 2:
				return __builtin_bswap16(val);
			case 4:
				return __builtin_bswap32(val);
			case 8:
				return __builtin_bswap64(val);
			// Only gcc has a 128-bit byte-order swap builtin, so we fall back to a generic byte-order swap implementation for clang and for msvc
			#if not defined(__clang__) && not defined(_MSC_VER)
			case 16:
				return __builtin_bswap128(val);
			#endif
			default:
				char *p = reinterpret_cast<char*>(val);
                size_t lo, hi;
                for(lo = 0, hi = sizeof(T) - 1; hi > lo; lo++, hi--)
                {
                    char tmp = p[lo];
                    p[lo] = p[hi];
                    p[hi] = tmp;
				}

				return (T)(*p);
        }
    }
  private:
	T _val;
};

#endif