Use C99 bool internally in SDL

src/main/SDL_main_callbacks.c

@@ -29,7 +29,7 @@ static SDL_AtomicInt apprc;  // use an atomic, since events might land from any
 static void *SDL_main_appstate = NULL;
 
 // Return true if this event needs to be processed before returning from the event watcher
-static SDL_bool ShouldDispatchImmediately(SDL_Event *event)
+static bool ShouldDispatchImmediately(SDL_Event *event)
 {
     switch (event->type) {
     case SDL_EVENT_TERMINATING:
@@ -38,9 +38,9 @@ static SDL_bool ShouldDispatchImmediately(SDL_Event *event)
     case SDL_EVENT_DID_ENTER_BACKGROUND:
     case SDL_EVENT_WILL_ENTER_FOREGROUND:
     case SDL_EVENT_DID_ENTER_FOREGROUND:
-        return SDL_TRUE;
+        return true;
     default:
-        return SDL_FALSE;
+        return false;
     }
 }
 
@@ -78,15 +78,15 @@ static SDL_bool SDLCALL SDL_MainCallbackEventWatcher(void *userdata, SDL_Event *
     } else {
         // We'll process this event later from the main event queue
     }
-    return SDL_TRUE;
+    return true;
 }
 
-SDL_bool SDL_HasMainCallbacks(void)
+bool SDL_HasMainCallbacks(void)
 {
     if (SDL_main_iteration_callback) {
-        return SDL_TRUE;
+        return true;
     }
-    return SDL_FALSE;
+    return false;
 }
 
 SDL_AppResult SDL_InitMainCallbacks(int argc, char* argv[], SDL_AppInit_func appinit, SDL_AppIterate_func appiter, SDL_AppEvent_func appevent, SDL_AppQuit_func appquit)
@@ -113,7 +113,7 @@ SDL_AppResult SDL_InitMainCallbacks(int argc, char* argv[], SDL_AppInit_func app
     return SDL_AtomicGet(&apprc);
 }
 
-SDL_AppResult SDL_IterateMainCallbacks(SDL_bool pump_events)
+SDL_AppResult SDL_IterateMainCallbacks(bool pump_events)
 {
     if (pump_events) {
         SDL_PumpEvents();

src/main/SDL_main_callbacks.h

@@ -22,9 +22,9 @@
 #ifndef SDL_main_callbacks_h_
 #define SDL_main_callbacks_h_
 
-SDL_bool SDL_HasMainCallbacks(void);
+bool SDL_HasMainCallbacks(void);
 SDL_AppResult SDL_InitMainCallbacks(int argc, char *argv[], SDL_AppInit_func appinit, SDL_AppIterate_func _appiter, SDL_AppEvent_func _appevent, SDL_AppQuit_func _appquit);
-SDL_AppResult SDL_IterateMainCallbacks(SDL_bool pump_events);
+SDL_AppResult SDL_IterateMainCallbacks(bool pump_events);
 void SDL_QuitMainCallbacks(void);
 
 #endif // SDL_main_callbacks_h_

src/main/emscripten/SDL_sysmain_callbacks.c

@@ -26,7 +26,7 @@
 
 static void EmscriptenInternalMainloop(void)
 {
-    const SDL_AppResult rc = SDL_IterateMainCallbacks(SDL_TRUE);
+    const SDL_AppResult rc = SDL_IterateMainCallbacks(true);
     if (rc != SDL_APP_CONTINUE) {
         SDL_QuitMainCallbacks();
         emscripten_cancel_main_loop();  // kill" the mainloop, so it stops calling back into it.

src/main/generic/SDL_sysmain_callbacks.c

@@ -45,7 +45,7 @@ int SDL_EnterAppMainCallbacks(int argc, char* argv[], SDL_AppInit_func appinit,
 
         Uint64 next_iteration = callback_rate_increment ? (SDL_GetTicksNS() + callback_rate_increment) : 0;
 
-        while ((rc = SDL_IterateMainCallbacks(SDL_TRUE)) == SDL_APP_CONTINUE) {
+        while ((rc = SDL_IterateMainCallbacks(true)) == SDL_APP_CONTINUE) {
             // !!! FIXME: this can be made more complicated if we decide to
             // !!! FIXME: optionally hand off callback responsibility to the
             // !!! FIXME: video subsystem (for example, if Wayland has a

src/main/ios/SDL_sysmain_callbacks.m

@@ -50,7 +50,7 @@ static SDLIosMainCallbacksDisplayLink *globalDisplayLink;
 
 - (void)appIteration:(CADisplayLink *)sender
 {
-    const SDL_AppResult rc = SDL_IterateMainCallbacks(SDL_TRUE);
+    const SDL_AppResult rc = SDL_IterateMainCallbacks(true);
     if (rc != SDL_APP_CONTINUE) {
         [self.displayLink invalidate];
         self.displayLink = nil;