Add endian conversion macros

engine/common/common.h

@@ -120,6 +120,37 @@ XASH SPECIFIC			- sort of hack that works only in Xash3D not in GoldSrc
 #define GAME_EXPORT
 #endif
 
+
+#ifdef XASH_BIG_ENDIAN
+#define LittleLong(x) (((int)(((x)&255)<<24)) + ((int)((((x)>>8)&255)<<16)) + ((int)(((x)>>16)&255)<<8) + (((x) >> 24)&255))
+#define LittleLongSW(x) (x = LittleLong(x) )
+#define LittleShort(x) ((short)( (((short)(x) >> 8) & 255) + (((short)(x) & 255) << 8)))
+#define LittleShortSW(x) (x = LittleShort(x) )
+_inline float LittleFloat( float f )
+{
+	union
+	{
+		float f;
+		unsigned char b[4];
+	} dat1, dat2;
+
+	dat1.f = f;
+	dat2.b[0] = dat1.b[3];
+	dat2.b[1] = dat1.b[2];
+	dat2.b[2] = dat1.b[1];
+	dat2.b[3] = dat1.b[0];
+
+	return dat2.f;
+}
+#else
+#define LittleLong(x) (x)
+#define LittleLongSW(x)
+#define LittleShort(x) (x)
+#define LittleShortSW(x)
+#define LittleFloat(x) (x)
+#endif
+
+
 typedef unsigned int	dword;
 typedef unsigned int	uint;
 typedef char		string[MAX_STRING];