time: Convert the PS2 time implementation to a dummy implementation

SDL has no dummy fallback for the RTC functions, and the PS2 implementation is just an empty dummy implementation, so rename it and build it if no system-specific time functionality is found.

CMakeLists.txt

@@ -3348,10 +3348,6 @@ elseif(PS2)
   )
   set(HAVE_SDL_THREADS TRUE)
 
-  set(SDL_TIME_PS2 1)
-  sdl_glob_sources("${SDL3_SOURCE_DIR}/src/time/ps2/*.c")
-  set(HAVE_SDL_TIME TRUE)
-
   set(SDL_TIMER_PS2 1)
   sdl_glob_sources("${SDL3_SOURCE_DIR}/src/timer/ps2/*.c")
   set(HAVE_SDL_TIMERS TRUE)
@@ -3845,6 +3841,12 @@ if(NOT HAVE_SDL_THREADS)
     message(FATAL_ERROR "Threads are needed by many SDL subsystems and may not be disabled")
   endif()
 endif()
+
+if(NOT HAVE_SDL_TIME)
+  set(SDL_TIME_DUMMY 1)
+  sdl_glob_sources("${SDL3_SOURCE_DIR}/src/time/dummy/*.c")
+endif()
+
 if(NOT HAVE_SDL_TIMERS)
   message(FATAL_ERROR "Timers are needed by many SDL subsystems and may not be disabled")
 endif()

include/build_config/SDL_build_config.h.cmake

@@ -383,9 +383,9 @@
 #cmakedefine SDL_TIME_WINDOWS 1
 #cmakedefine SDL_TIME_VITA 1
 #cmakedefine SDL_TIME_PSP 1
-#cmakedefine SDL_TIME_PS2 1
 #cmakedefine SDL_TIME_N3DS 1
 #cmakedefine SDL_TIME_NGAGE 1
+#cmakedefine SDL_TIME_DUMMY 1
 
 #cmakedefine SDL_TIME_PRIVATE 1
 

src/time/ps2/SDL_systime.c → src/time/dummy/SDL_systime.c

@@ -20,16 +20,13 @@
 */
 #include "SDL_internal.h"
 
-#ifdef SDL_TIME_PS2
+#ifdef SDL_TIME_DUMMY
 
 #include "../SDL_time_c.h"
 
-// PS2 epoch is Jan 1 2000 JST (UTC +9)
-#define UNIX_EPOCH_OFFSET_SEC 946717200
-
-// TODO: Implement this...
 void SDL_GetSystemTimeLocalePreferences(SDL_DateFormat *df, SDL_TimeFormat *tf)
 {
+    // NOP
 }
 
 bool SDL_GetCurrentTime(SDL_Time *ticks)
@@ -38,9 +35,10 @@ bool SDL_GetCurrentTime(SDL_Time *ticks)
         return SDL_InvalidParamError("ticks");
     }
 
+    // Jan 1, 1970
     *ticks = 0;
 
-    return true;
+    return SDL_Unsupported();
 }
 
 bool SDL_TimeToDateTime(SDL_Time ticks, SDL_DateTime *dt, bool localTime)
@@ -49,7 +47,6 @@ bool SDL_TimeToDateTime(SDL_Time ticks, SDL_DateTime *dt, bool localTime)
         return SDL_InvalidParamError("dt");
     }
 
-    // FIXME: Need implementation
     dt->year = 1970;
     dt->month = 1;
     dt->day = 1;
@@ -60,7 +57,7 @@ bool SDL_TimeToDateTime(SDL_Time ticks, SDL_DateTime *dt, bool localTime)
     dt->day_of_week = 4;
     dt->utc_offset = 0;
 
-    return true;
+    return SDL_Unsupported();
 }
 
-#endif // SDL_TIME_PS2
+#endif // SDL_TIME_DUMMY