/**
 * Copyright (C) 2005-2012 Gekko Emulator
 *
 * @file    platform.h
 * @author  ShizZy <shizzy247@gmail.com>
 * @date    2012-02-11
 * @brief   Platform detection macros for portable compilation
 *
 * @section LICENSE
 * This program 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.
 *
 * This program 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 at
 * http://www.gnu.org/copyleft/gpl.html
 *
 * Official project repository can be found at:
 * http://code.google.com/p/gekko-gc-emu/
 */

#ifndef COMMON_PLATFORM_H_
#define COMMON_PLATFORM_H_

#include "common/common_types.h"

////////////////////////////////////////////////////////////////////////////////////////////////////
// Platform definitions

/// Enumeration for defining the supported platforms
#define PLATFORM_NULL 0
#define PLATFORM_WINDOWS 1
#define PLATFORM_MACOSX 2
#define PLATFORM_LINUX 3
#define PLATFORM_ANDROID 4
#define PLATFORM_IOS 5

////////////////////////////////////////////////////////////////////////////////////////////////////
// Platform detection

#ifndef EMU_PLATFORM

#if defined( __WIN32__ ) || defined( _WIN32 )
#define EMU_PLATFORM PLATFORM_WINDOWS

#elif defined( __APPLE__ ) || defined( __APPLE_CC__ )
#define EMU_PLATFORM PLATFORM_MAXOSX

#elif defined(__linux__)
#define EMU_PLATFORM PLATFORM_LINUX

#else // Assume linux otherwise
#define EMU_PLATFORM PLATFORM_LINUX

#endif

#endif

#if defined(__x86_64__) || defined(_M_X64) || defined(__alpha__) || defined(__ia64__)
#define EMU_ARCHITECTURE_X64
#else
#define EMU_ARCHITECTURE_X86
#endif

////////////////////////////////////////////////////////////////////////////////////////////////////
// Compiler-Specific Definitions

#if EMU_PLATFORM == PLATFORM_WINDOWS

#include <time.h>

#define NOMINMAX
#define EMU_FASTCALL __fastcall

inline struct tm* localtime_r(const time_t *clock, struct tm *result) {
    if (localtime_s(result, clock) == 0)
        return result;
    return NULL;
}

#else

#define EMU_FASTCALL __attribute__((fastcall))
#define __stdcall
#define __cdecl

#define LONG long
#define BOOL bool
#define DWORD u32

#endif

#if EMU_PLATFORM != PLATFORM_WINDOWS

// TODO: Hacks..
#include <limits.h>
#define MAX_PATH PATH_MAX

#include <strings.h>
#define stricmp(str1, str2) strcasecmp(str1, str2)
#define _stricmp(str1, str2) strcasecmp(str1, str2)
#define _snprintf snprintf
#define _getcwd getcwd
#define _tzset tzset

typedef void EXCEPTION_POINTERS;

inline u32 _rotl(u32 x, int shift) {
    shift &= 31;
    if (0 == shift) {
        return x;
    }
    return (x << shift) | (x >> (32 - shift));
}

inline u64 _rotl64(u64 x, u32 shift){
    u32 n = shift % 64;
    return (x << n) | (x >> (64 - n));
}

inline u32 _rotr(u32 x, int shift) {
    shift &= 31;
    if (0 == shift) {
        return x;
    }
    return (x >> shift) | (x << (32 - shift));
}

inline u64 _rotr64(u64 x, u32 shift){
    u32 n = shift % 64;
    return (x >> n) | (x << (64 - n));
}

#endif

#define GCC_VERSION_AVAILABLE(major, minor) (defined(__GNUC__) &&  (__GNUC__ > (major) || \
    (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))))

#endif // COMMON_PLATFORM_H_
