/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.
Copyright (C) 2000-2013 Darklegion Development

This file is part of Tremulous.

Tremulous is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.

Tremulous is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Tremulous; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
===========================================================================
*/

#ifndef __Q_PLATFORM_H
#define __Q_PLATFORM_H

// this is for determining if we have an asm version of a C function
#define idx64 0

#ifdef Q3_VM

#define id386 0
#define idppc 0
#define idppc_altivec 0
#define idsparc 0

#else

#if (defined _M_IX86 || defined __i386__) && !defined(C_ONLY)
#define id386 1
#else
#define id386 0
#endif

#if (defined(powerc) || defined(powerpc) || defined(ppc) || \
	defined(__ppc) || defined(__ppc__)) && !defined(C_ONLY)
#define idppc 1
#if defined(__VEC__)
#define idppc_altivec 1
#ifdef MACOS_X  // Apple's GCC does this differently than the FSF.
#define VECCONST_UINT8(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) \
	(vector unsigned char) (a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p)
#else
#define VECCONST_UINT8(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) \
	(vector unsigned char) {a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p}
#endif
#else
#define idppc_altivec 0
#endif
#else
#define idppc 0
#define idppc_altivec 0
#endif

#if defined(__sparc__) && !defined(C_ONLY)
#define idsparc 1
#else
#define idsparc 0
#endif

#endif

#ifndef __ASM_I386__ // don't include the C bits if included from qasm.h

// for windows fastcall option
#define QDECL
#define QCALL

//================================================================= WIN64/32 ===

#if defined(_WIN64) || defined(__WIN64__)

#undef idx64
#define idx64 1

#undef QDECL
#define QDECL __cdecl

#undef QCALL
#define QCALL __stdcall

#if defined( _MSC_VER )
#define OS_STRING "win_msvc64"
#elif defined __MINGW64__
#define OS_STRING "win_mingw64"
#endif

#define ID_INLINE __inline
#define PATH_SEP '\\'

#if defined( __WIN64__ ) 
#define ARCH_STRING "x86_64"
#elif defined _M_ALPHA
#define ARCH_STRING "AXP"
#endif

#define Q3_LITTLE_ENDIAN

#define DLL_EXT ".dll"

#elif defined(_WIN32) || defined(__WIN32__)

#undef QDECL
#define QDECL __cdecl

#undef QCALL
#define QCALL __stdcall

#if defined( _MSC_VER )
#define OS_STRING "win_msvc"
#elif defined __MINGW32__
#define OS_STRING "win_mingw"
#endif

#define ID_INLINE __inline
#define PATH_SEP '\\'

#if defined( _M_IX86 ) || defined( __i386__ )
#define ARCH_STRING "x86"
#elif defined _M_ALPHA
#define ARCH_STRING "AXP"
#endif

#define Q3_LITTLE_ENDIAN

#define DLL_EXT ".dll"

#endif


//============================================================== MAC OS X ===

#if defined(MACOS_X) || defined(__APPLE_CC__)

// make sure this is defined, just for sanity's sake...
#ifndef MACOS_X
#define MACOS_X
#endif

#define OS_STRING "macosx"
#define ID_INLINE inline
#define PATH_SEP '/'

#ifdef __ppc__
#define ARCH_STRING "ppc"
#define Q3_BIG_ENDIAN
#elif defined __i386__
#define ARCH_STRING "x86"
#define Q3_LITTLE_ENDIAN
#elif defined __x86_64__
#undef idx64
#define idx64 1
#define ARCH_STRING "x86_64"
#define Q3_LITTLE_ENDIAN
#endif

#define DLL_EXT ".dylib"

#endif

//================================================================= LINUX ===

#if defined(__linux__) || defined(__FreeBSD_kernel__) || defined(__GNU__)

#include <endian.h>

#if defined(__linux__)
#define OS_STRING "linux"
#elif defined(__FreeBSD_kernel__)
#define OS_STRING "kFreeBSD"
#else
#define OS_STRING "GNU"
#endif

#define ID_INLINE inline

#define PATH_SEP '/'

#if !defined(ARCH_STRING)
# error ARCH_STRING should be defined by the Makefile
#endif

#if defined __x86_64__
#undef idx64
#define idx64 1
#endif

#if __FLOAT_WORD_ORDER == __BIG_ENDIAN
#define Q3_BIG_ENDIAN
#else
#define Q3_LITTLE_ENDIAN
#endif

#define DLL_EXT ".so"

#endif

//=================================================================== BSD ===

#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__)

#include <sys/types.h>
#include <machine/endian.h>

#ifndef __BSD__
  #define __BSD__
#endif

#if defined(__FreeBSD__)
#define OS_STRING "freebsd"
#elif defined(__OpenBSD__)
#define OS_STRING "openbsd"
#elif defined(__NetBSD__)
#define OS_STRING "netbsd"
#endif

#define ID_INLINE inline
#define PATH_SEP '/'

#ifdef __i386__
#define ARCH_STRING "x86"
#elif defined __amd64__
#undef idx64
#define idx64 1
#define ARCH_STRING "x86_64"
#elif defined __axp__
#define ARCH_STRING "alpha"
#endif

#if BYTE_ORDER == BIG_ENDIAN
#define Q3_BIG_ENDIAN
#else
#define Q3_LITTLE_ENDIAN
#endif

#define DLL_EXT ".so"

#endif

//================================================================= SUNOS ===

#ifdef __sun

#include <stdint.h>
#include <sys/byteorder.h>

#define OS_STRING "solaris"
#define ID_INLINE inline
#define PATH_SEP '/'

#ifdef __i386__
#define ARCH_STRING "x86"
#elif defined __sparc
#define ARCH_STRING "sparc"
#endif

#if defined( _BIG_ENDIAN )
#define Q3_BIG_ENDIAN
#elif defined( _LITTLE_ENDIAN )
#define Q3_LITTLE_ENDIAN
#endif

#define DLL_EXT ".so"

#endif

//================================================================== IRIX ===

#ifdef __sgi

#define OS_STRING "irix"
#define ID_INLINE __inline
#define PATH_SEP '/'

#define ARCH_STRING "mips"

#define Q3_BIG_ENDIAN // SGI's MIPS are always big endian

#define DLL_EXT ".so"

#endif

//================================================================== Q3VM ===

#ifdef Q3_VM

#define OS_STRING "q3vm"
#define ID_INLINE
#define PATH_SEP '/'

#define ARCH_STRING "bytecode"

#define DLL_EXT ".qvm"

#endif

//===========================================================================

//catch missing defines in above blocks
#if !defined( OS_STRING )
#error "Operating system not supported"
#endif

#if !defined( ARCH_STRING )
#error "Architecture not supported"
#endif

#ifndef ID_INLINE
#error "ID_INLINE not defined"
#endif

#ifndef PATH_SEP
#error "PATH_SEP not defined"
#endif

#ifndef DLL_EXT
#error "DLL_EXT not defined"
#endif


//endianness
void CopyShortSwap (void *dest, void *src);
void CopyLongSwap (void *dest, void *src);
short ShortSwap (short l);
int LongSwap (int l);
float FloatSwap (const float *f);

#if defined( Q3_BIG_ENDIAN ) && defined( Q3_LITTLE_ENDIAN )
#error "Endianness defined as both big and little"
#elif defined( Q3_BIG_ENDIAN )

#define CopyLittleShort(dest, src) CopyShortSwap(dest, src)
#define CopyLittleLong(dest, src) CopyLongSwap(dest, src)
#define LittleShort(x) ShortSwap(x)
#define LittleLong(x) LongSwap(x)
#define LittleFloat(x) FloatSwap(&x)
#define BigShort
#define BigLong
#define BigFloat

#elif defined( Q3_LITTLE_ENDIAN )

#define CopyLittleShort(dest, src) Com_Memcpy(dest, src, 2)
#define CopyLittleLong(dest, src) Com_Memcpy(dest, src, 4)
#define LittleShort
#define LittleLong
#define LittleFloat
#define BigShort(x) ShortSwap(x)
#define BigLong(x) LongSwap(x)
#define BigFloat(x) FloatSwap(&x)

#elif defined( Q3_VM )

#define LittleShort
#define LittleLong
#define LittleFloat
#define BigShort
#define BigLong
#define BigFloat

#else
#error "Endianness not defined"
#endif


//platform string
#ifdef NDEBUG
#define PLATFORM_STRING OS_STRING "-" ARCH_STRING
#else
#define PLATFORM_STRING OS_STRING "-" ARCH_STRING "-debug"
#endif

#endif

#endif
