rubidium@8113: /* $Id$ */
rubidium@8113: 
rubidium@9111: /** @file endian_func.hpp Function to handling different endian machines. */
rubidium@8113: 
rubidium@8113: #ifndef ENDIAN_FUNC_H
rubidium@8113: #define ENDIAN_FUNC_H
rubidium@8113: 
rubidium@8132: #include "bitmath_func.hpp"
rubidium@8132: 
rubidium@8132: #if defined(ARM) || defined(__arm__) || defined(__alpha__)
rubidium@8132: 	#define OTTD_ALIGNMENT
rubidium@8132: #endif
rubidium@8132: 
rubidium@8132: /* Windows has always LITTLE_ENDIAN */
rubidium@8132: #if defined(WIN32) || defined(__OS2__) || defined(WIN64)
rubidium@8132: 	#define TTD_LITTLE_ENDIAN
rubidium@8132: #elif !defined(TESTING)
rubidium@8132: 	/* Else include endian[target/host].h, which has the endian-type, autodetected by the Makefile */
rubidium@8132: 	#if defined(STRGEN)
rubidium@8135: 		#include "endian_host.h"
rubidium@8132: 	#else
rubidium@8132: 		#include "endian_target.h"
rubidium@8132: 	#endif
rubidium@8132: #endif /* WIN32 || __OS2__ || WIN64 */
rubidium@8132: 
rubidium@8132: /* Setup alignment and conversion macros */
rubidium@8132: #if defined(TTD_BIG_ENDIAN)
skidd13@8133: 	#define FROM_BE16(x) (x)
rubidium@8132: 	#define FROM_BE32(x) (x)
skidd13@8133: 	#define TO_BE16(x)   (x)
rubidium@8132: 	#define TO_BE32(x)   (x)
skidd13@8133: 	#define TO_BE32X(x)  (x)
skidd13@8133: 	#define FROM_LE16(x) BSWAP16(x)
skidd13@8133: 	#define FROM_LE32(x) BSWAP32(x)
skidd13@8133: 	#define TO_LE16(x)   BSWAP16(x)
skidd13@8133: 	#define TO_LE32(x)   BSWAP32(x)
rubidium@8132: 	#define TO_LE32X(x)  BSWAP32(x)
rubidium@8132: #else
skidd13@8133: 	#define FROM_BE16(x) BSWAP16(x)
skidd13@8133: 	#define FROM_BE32(x) BSWAP32(x)
skidd13@8133: 	#define TO_BE16(x)   BSWAP16(x)
skidd13@8133: 	#define TO_BE32(x)   BSWAP32(x)
rubidium@8132: 	#define TO_BE32X(x)  BSWAP32(x)
skidd13@8133: 	#define FROM_LE16(x) (x)
skidd13@8133: 	#define FROM_LE32(x) (x)
skidd13@8133: 	#define TO_LE16(x)   (x)
skidd13@8133: 	#define TO_LE32(x)   (x)
rubidium@8132: 	#define TO_LE32X(x)  (x)
rubidium@8132: #endif /* TTD_BIG_ENDIAN */
rubidium@8132: 
rubidium@8113: static inline uint16 ReadLE16Aligned(const void *x)
rubidium@8113: {
rubidium@8113: 	return FROM_LE16(*(const uint16*)x);
rubidium@8113: }
rubidium@8113: 
rubidium@8113: static inline uint16 ReadLE16Unaligned(const void *x)
rubidium@8113: {
rubidium@8113: #ifdef OTTD_ALIGNMENT
rubidium@8113: 	return ((const byte*)x)[0] | ((const byte*)x)[1] << 8;
rubidium@8113: #else
rubidium@8113: 	return FROM_LE16(*(const uint16*)x);
rubidium@8113: #endif
rubidium@8113: }
rubidium@8113: 
rubidium@8132: #endif /* ENDIAN_FUNC_HPP */