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//===-- include/Support/DataTypes.h - Define fixed size types ----*- C++ -*--=//
//
// This file contains definitions to figure out the size of _HOST_ data types.
// This file is important because different host OS's define different macros,
// which makes portability tough. This file exports the following definitions:
//
// ENDIAN_LITTLE : is #define'd if the host is little endian
// int64_t : is a typedef for the signed 64 bit system type
// uint64_t : is a typedef for the unsigned 64 bit system type
// INT64_MAX : is a #define specifying the max value for int64_t's
//
// No library is required when using these functinons.
//
//===----------------------------------------------------------------------===//
// TODO: This file sucks. Not only does it not work, but this stuff should be
// autoconfiscated anyways. Major FIXME
#ifndef SUPPORT_DATATYPES_H
#define SUPPORT_DATATYPES_H
#define __STDC_LIMIT_MACROS 1
#include <inttypes.h>
#ifdef __linux__
# include <endian.h>
# if BYTE_ORDER == LITTLE_ENDIAN
# undef BIG_ENDIAN
# else
# undef LITTLE_ENDIAN
# endif
#endif
#ifdef __FreeBSD__
# include <machine/endian.h>
# if _BYTE_ORDER == _LITTLE_ENDIAN
# ifndef LITTLE_ENDIAN
# define LITTLE_ENDIAN 1
# endif
# ifdef BIG_ENDIAN
# undef BIG_ENDIAN
# endif
# else
# ifndef BIG_ENDIAN
# define BIG_ENDIAN 1
# endif
# ifdef LITTLE_ENDIAN
# undef LITTLE_ENDIAN
# endif
# endif
#endif
#ifdef __sparc__
# include <sys/types.h>
# ifdef _LITTLE_ENDIAN
# define LITTLE_ENDIAN 1
# else
# define BIG_ENDIAN 1
# endif
#endif
//
// Convert the information from the header files into our own local
// endian macros. We do this because various strange systems define both
// BIG_ENDIAN and LITTLE_ENDIAN, and we don't want to conflict with them.
//
// Don't worry; once we introduce autoconf, this will look a lot nicer.
//
#ifdef LITTLE_ENDIAN
#define ENDIAN_LITTLE
#endif
#ifdef BIG_ENDIAN
#define ENDIAN_BIG
#endif
#if (defined(ENDIAN_LITTLE) && defined(ENDIAN_BIG))
#error "Cannot define both ENDIAN_LITTLE and ENDIAN_BIG!"
#endif
#if (!defined(ENDIAN_LITTLE) && !defined(ENDIAN_BIG)) || !defined(INT64_MAX)
#error "include/Support/DataTypes.h could not determine endianness!"
#endif
#endif /* SUPPORT_DATATYPES_H */
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