/*

Simple DirectMedia Layer

Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>

This software is provided 'as-is', without any express or implied

warranty. In no event will the authors be held liable for any damages

arising from the use of this software.

Permission is granted to anyone to use this software for any purpose,

including commercial applications, and to alter it and redistribute it

freely, subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must not

claim that you wrote the original software. If you use this software

in a product, an acknowledgment in the product documentation would be

appreciated but is not required.

2. Altered source versions must be plainly marked as such, and must not be

misrepresented as being the original software.

3. This notice may not be removed or altered from any source distribution.

*/

#include "SDL_config.h"

/* Initialization code for SDL */

#include "SDL.h"

#include "SDL_revision.h"

#include "SDL_fatal.h"

#include "SDL_assert_c.h"

#include "haptic/SDL_haptic_c.h"

#include "joystick/SDL_joystick_c.h"

/* Initialization/Cleanup routines */

#if !SDL_TIMERS_DISABLED

extern void SDL_StartTicks(void);

extern int SDL_TimerInit(void);

extern void SDL_TimerQuit(void);

#endif

#if defined(__WIN32__)

extern int SDL_HelperWindowCreate(void);

extern int SDL_HelperWindowDestroy(void);

#endif

/* The initialized subsystems */

static Uint32 SDL_initialized = 0;

static Uint32 ticks_started = 0;

static SDL_bool SDL_bInMainQuit = SDL_FALSE;

static Uint8 SDL_SubsystemRefCount[ 32 ]; // keep a per subsystem init

/* helper func to return the index of the MSB in an int */

int msb32_idx( Uint32 n)

{

int b = 0;

if (!n) return -1;

#define step(x) if (n >= ((Uint32)1) << x) b += x, n >>= x

step(16); step(8); step(4); step(2); step(1);

#undef step

return b;

}

int

SDL_InitSubSystem(Uint32 flags)

{

#if !SDL_TIMERS_DISABLED

/* Initialize the timer subsystem */

if (!ticks_started) {

SDL_StartTicks();

ticks_started = 1;

}

if ((flags & SDL_INIT_TIMER) ){

SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_TIMER) ]++;

SDL_assert( SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_TIMER) ] < 254 );

if ( !(SDL_initialized & SDL_INIT_TIMER)) {

if (SDL_TimerInit() < 0) {

return (-1);

}

SDL_initialized |= SDL_INIT_TIMER;

}

}

#else

if (flags & SDL_INIT_TIMER) {

SDL_SetError("SDL not built with timer support");

return (-1);

}

#endif

#if !SDL_VIDEO_DISABLED

/* Initialize the video/event subsystem */

if ((flags & SDL_INIT_VIDEO) ) {

SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_VIDEO) ]++;

SDL_assert( SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_VIDEO) ] < 254 );

if ( !(SDL_initialized & SDL_INIT_VIDEO)) {

if (SDL_VideoInit(NULL) < 0) {

return (-1);

}

SDL_initialized |= SDL_INIT_VIDEO;

}

}

#else

if (flags & SDL_INIT_VIDEO) {

SDL_SetError("SDL not built with video support");

return (-1);

}

#endif

#if !SDL_AUDIO_DISABLED

/* Initialize the audio subsystem */

if ((flags & SDL_INIT_AUDIO) ) {

SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_AUDIO) ]++;

SDL_assert( SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_AUDIO) ] < 254 );

if ( !(SDL_initialized & SDL_INIT_AUDIO)) {

if (SDL_AudioInit(NULL) < 0) {

return (-1);

}

SDL_initialized |= SDL_INIT_AUDIO;

}

}

#else

if (flags & SDL_INIT_AUDIO) {

SDL_SetError("SDL not built with audio support");

return (-1);

}

#endif

#if !SDL_JOYSTICK_DISABLED

/* Initialize the joystick subsystem */

if ( ( (flags & SDL_INIT_JOYSTICK) ) || ((flags & SDL_INIT_GAMECONTROLLER) ) ) { // game controller implies joystick

SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_JOYSTICK) ]++;

SDL_assert( SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_JOYSTICK) ] < 254 );

if ( !(SDL_initialized & SDL_INIT_JOYSTICK) && SDL_JoystickInit() < 0) {

return (-1);

}

if ((flags & SDL_INIT_GAMECONTROLLER) ) {

SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_GAMECONTROLLER) ]++;

SDL_assert( SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_GAMECONTROLLER) ] < 254 );

if ( !(SDL_initialized & SDL_INIT_GAMECONTROLLER)) {

if (SDL_GameControllerInit() < 0) {

return (-1);

}

SDL_initialized |= SDL_INIT_GAMECONTROLLER;

}

}

SDL_initialized |= SDL_INIT_JOYSTICK;

}

#else

if (flags & SDL_INIT_JOYSTICK) {

SDL_SetError("SDL not built with joystick support");

return (-1);

}

#endif

#if !SDL_HAPTIC_DISABLED

/* Initialize the haptic subsystem */

if ((flags & SDL_INIT_HAPTIC) ) {

SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_HAPTIC) ]++;

SDL_assert( SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_HAPTIC) ] < 254 );

if ( !(SDL_initialized & SDL_INIT_HAPTIC)) {

if (SDL_HapticInit() < 0) {

return (-1);

}

SDL_initialized |= SDL_INIT_HAPTIC;

}

}

#else

if (flags & SDL_INIT_HAPTIC) {

SDL_SetError("SDL not built with haptic (force feedback) support");

return (-1);

}

#endif

return (0);

}

int

SDL_Init(Uint32 flags)

{

if (SDL_AssertionsInit() < 0) {

return -1;

}

/* Clear the error message */

SDL_ClearError();

#if defined(__WIN32__)

if (SDL_HelperWindowCreate() < 0) {

return -1;

}

#endif

/* Initialize the desired subsystems */

if (SDL_InitSubSystem(flags) < 0) {

return (-1);

}

/* Everything is initialized */

if (!(flags & SDL_INIT_NOPARACHUTE)) {

SDL_InstallParachute();

}

return (0);

}

void

SDL_QuitSubSystem(Uint32 flags)

{

/* Shut down requested initialized subsystems */

#if !SDL_JOYSTICK_DISABLED

if ((flags & SDL_initialized & SDL_INIT_JOYSTICK) || (flags & SDL_initialized & SDL_INIT_GAMECONTROLLER)) {

if ( (flags & SDL_initialized & SDL_INIT_GAMECONTROLLER) ) {

SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_GAMECONTROLLER) ]--;

if ( SDL_bInMainQuit || SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_GAMECONTROLLER) ] == 0 ) {

SDL_GameControllerQuit();

SDL_initialized &= ~SDL_INIT_GAMECONTROLLER;

}

}

SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_JOYSTICK) ]--;

if ( SDL_bInMainQuit || SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_JOYSTICK) ] == 0 )

{

SDL_JoystickQuit();

SDL_initialized &= ~SDL_INIT_JOYSTICK;

}

}

#endif

#if !SDL_HAPTIC_DISABLED

if ((flags & SDL_initialized & SDL_INIT_HAPTIC)) {

SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_HAPTIC) ]--;

if ( SDL_bInMainQuit || SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_HAPTIC) ] == 0 )

{

SDL_HapticQuit();

SDL_initialized &= ~SDL_INIT_HAPTIC;

}

}

#endif

#if !SDL_AUDIO_DISABLED

if ((flags & SDL_initialized & SDL_INIT_AUDIO)) {

SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_AUDIO) ]--;

if ( SDL_bInMainQuit || SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_AUDIO) ] == 0 )

{

SDL_AudioQuit();

SDL_initialized &= ~SDL_INIT_AUDIO;

}

}

#endif

#if !SDL_VIDEO_DISABLED

if ((flags & SDL_initialized & SDL_INIT_VIDEO)) {

SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_VIDEO) ]--;

if ( SDL_bInMainQuit || SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_VIDEO) ] == 0 )

{

SDL_VideoQuit();

SDL_initialized &= ~SDL_INIT_VIDEO;

}

}

#endif

#if !SDL_TIMERS_DISABLED

if ((flags & SDL_initialized & SDL_INIT_TIMER)) {

SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_TIMER) ]--;

if ( SDL_bInMainQuit || SDL_SubsystemRefCount[ msb32_idx(SDL_INIT_TIMER) ] == 0 )

{

SDL_TimerQuit();

SDL_initialized &= ~SDL_INIT_TIMER;

}

}

#endif

}

Uint32

SDL_WasInit(Uint32 flags)

{

if (!flags) {

flags = SDL_INIT_EVERYTHING;

}

return (SDL_initialized & flags);

}

void

SDL_Quit(void)

{

/* Quit all subsystems */

#if defined(__WIN32__)

SDL_HelperWindowDestroy();

#endif

SDL_QuitSubSystem(SDL_INIT_EVERYTHING);

/* Uninstall any parachute signal handlers */

SDL_UninstallParachute();

SDL_ClearHints();

SDL_AssertionsQuit();

SDL_LogResetPriorities();

SDL_memset( SDL_SubsystemRefCount, 0x0, sizeof(SDL_SubsystemRefCount) );

SDL_bInMainQuit = SDL_FALSE;

}

/* Get the library version number */

void

SDL_GetVersion(SDL_version * ver)

{

SDL_VERSION(ver);

}

/* Get the library source revision */

const char *

SDL_GetRevision(void)

{

return SDL_REVISION;

}

/* Get the library source revision number */

int

SDL_GetRevisionNumber(void)

{

return SDL_REVISION_NUMBER;

}

/* Get the name of the platform */

const char *

SDL_GetPlatform()

{

#if __AIX__

return "AIX";

#elif __ANDROID__

return "Android";

#elif __HAIKU__

/* Haiku must appear here before BeOS, since it also defines __BEOS__ */

return "Haiku";

#elif __BEOS__

return "BeOS";

#elif __BSDI__

return "BSDI";

#elif __DREAMCAST__

return "Dreamcast";

#elif __FREEBSD__

return "FreeBSD";

#elif __HPUX__

return "HP-UX";

#elif __IRIX__

return "Irix";

#elif __LINUX__

return "Linux";

#elif __MINT__

return "Atari MiNT";

#elif __MACOS__

return "MacOS Classic";

#elif __MACOSX__

return "Mac OS X";

#elif __NETBSD__

return "NetBSD";

#elif __NDS__

return "Nintendo DS";

#elif __OPENBSD__

return "OpenBSD";

#elif __OS2__

return "OS/2";

#elif __OSF__

return "OSF/1";

#elif __QNXNTO__

return "QNX Neutrino";

#elif __RISCOS__

return "RISC OS";

#elif __SOLARIS__

return "Solaris";

#elif __WIN32__

return "Windows";

#elif __IPHONEOS__

return "iPhone OS";

#else

return "Unknown (see SDL_platform.h)";

#endif

}

#if defined(__WIN32__)

#if !defined(HAVE_LIBC) || (defined(__WATCOMC__) && defined(BUILD_DLL))

/* Need to include DllMain() on Watcom C for some reason.. */

#include "core/windows/SDL_windows.h"

BOOL APIENTRY

_DllMainCRTStartup(HANDLE hModule,

DWORD ul_reason_for_call, LPVOID lpReserved)

{

switch (ul_reason_for_call) {

case DLL_PROCESS_ATTACH:

case DLL_THREAD_ATTACH:

case DLL_THREAD_DETACH:

case DLL_PROCESS_DETACH:

break;

}

return TRUE;

}

#endif /* building DLL with Watcom C */

#endif /* __WIN32__ */

/* vi: set ts=4 sw=4 expandtab: */