Added portable file and directory operations (thanks @icculus!)

CMakeLists.txt

@@ -482,6 +482,7 @@ sdl_glob_sources(
   "${SDL3_SOURCE_DIR}/src/dynapi/*.c"
   "${SDL3_SOURCE_DIR}/src/events/*.c"
   "${SDL3_SOURCE_DIR}/src/file/*.c"
+  "${SDL3_SOURCE_DIR}/src/filesystem/*.c"
   "${SDL3_SOURCE_DIR}/src/joystick/*.c"
   "${SDL3_SOURCE_DIR}/src/haptic/*.c"
   "${SDL3_SOURCE_DIR}/src/hidapi/*.c"
@@ -1288,6 +1289,14 @@ if(ANDROID)
   sdl_glob_sources("${SDL3_SOURCE_DIR}/src/filesystem/android/*.c")
   set(HAVE_SDL_FILESYSTEM TRUE)
 
+  set(SDL_FSOPS_POSIX 1)  # !!! FIXME: this might need something else for .apk data?
+  sdl_sources("${SDL3_SOURCE_DIR}/src/filesystem/posix/SDL_sysfsops.c")
+  set(HAVE_SDL_FSOPS TRUE)
+
+  set(SDL_FSOPS_POSIX 1)  # !!! FIXME: this might need something else for .apk data?
+  sdl_sources("${SDL3_SOURCE_DIR}/src/filesystem/posix/SDL_sysfsops.c")
+  set(HAVE_SDL_FSOPS TRUE)
+
   if(SDL_HAPTIC)
     set(SDL_HAPTIC_ANDROID 1)
     sdl_glob_sources("${SDL3_SOURCE_DIR}/src/haptic/android/*.c")
@@ -1446,6 +1455,14 @@ elseif(EMSCRIPTEN)
   sdl_glob_sources("${SDL3_SOURCE_DIR}/src/filesystem/emscripten/*.c")
   set(HAVE_SDL_FILESYSTEM TRUE)
 
+  set(SDL_FSOPS_POSIX 1)
+  sdl_sources("${SDL3_SOURCE_DIR}/src/filesystem/posix/SDL_sysfsops.c")
+  set(HAVE_SDL_FSOPS TRUE)
+
+  set(SDL_FSOPS_POSIX 1)
+  sdl_sources("${SDL3_SOURCE_DIR}/src/filesystem/posix/SDL_sysfsops.c")
+  set(HAVE_SDL_FSOPS TRUE)
+
   if(SDL_CAMERA)
     set(SDL_CAMERA_DRIVER_EMSCRIPTEN 1)
     set(HAVE_CAMERA TRUE)
@@ -1762,6 +1779,10 @@ elseif(UNIX AND NOT APPLE AND NOT RISCOS AND NOT HAIKU)
   endif()
   set(HAVE_SDL_STORAGE 1)
 
+  set(SDL_FSOPS_POSIX 1)
+  sdl_sources("${SDL3_SOURCE_DIR}/src/filesystem/posix/SDL_sysfsops.c")
+  set(HAVE_SDL_FSOPS TRUE)
+
   set(SDL_TIMER_UNIX 1)
   sdl_glob_sources("${SDL3_SOURCE_DIR}/src/timer/unix/*.c")
   set(HAVE_SDL_TIMERS TRUE)
@@ -1976,11 +1997,15 @@ elseif(WINDOWS)
   set(SDL_FILESYSTEM_WINDOWS 1)
   if(WINDOWS_STORE)
     sdl_glob_sources("${SDL3_SOURCE_DIR}/src/filesystem/winrt/*.cpp")
+    sdl_sources("${SDL3_SOURCE_DIR}/src/filesystem/windows/SDL_sysfsops.c")
   else()
     sdl_glob_sources("${SDL3_SOURCE_DIR}/src/filesystem/windows/*.c")
   endif()
   set(HAVE_SDL_FILESYSTEM TRUE)
 
+  set(SDL_FSOPS_WINDOWS 1)
+  set(HAVE_SDL_FSOPS TRUE)
+
   set(SDL_STORAGE_GENERIC 1)
   sdl_glob_sources("${SDL3_SOURCE_DIR}/src/storage/generic/*.c")
   if(NOT WINDOWS_STORE)
@@ -2230,6 +2255,10 @@ elseif(APPLE)
   endif()
   set(HAVE_SDL_STORAGE 1)
 
+  set(SDL_FSOPS_POSIX 1)
+  sdl_sources("${SDL3_SOURCE_DIR}/src/filesystem/posix/SDL_sysfsops.c")
+  set(HAVE_SDL_FSOPS TRUE)
+
   if(SDL_SENSOR)
     if(IOS OR VISIONOS)
       set(SDL_SENSOR_COREMOTION 1)
@@ -2422,6 +2451,14 @@ elseif(HAIKU)
   sdl_glob_sources("${SDL3_SOURCE_DIR}/src/filesystem/haiku/*.cc")
   set(HAVE_SDL_FILESYSTEM TRUE)
 
+  set(SDL_FSOPS_POSIX 1)
+  sdl_sources("${SDL3_SOURCE_DIR}/src/filesystem/posix/SDL_sysfsops.c")
+  set(HAVE_SDL_FSOPS TRUE)
+
+  set(SDL_FSOPS_POSIX 1)
+  sdl_sources("${SDL3_SOURCE_DIR}/src/filesystem/posix/SDL_sysfsops.c")
+  set(HAVE_SDL_FSOPS TRUE)
+
   set(SDL_TIMER_HAIKU 1)
   sdl_glob_sources("${SDL3_SOURCE_DIR}/src/timer/haiku/*.c")
   set(HAVE_SDL_TIMERS TRUE)
@@ -2454,6 +2491,14 @@ elseif(RISCOS)
   sdl_glob_sources("${SDL3_SOURCE_DIR}/src/filesystem/riscos/*.c")
   set(HAVE_SDL_FILESYSTEM TRUE)
 
+  set(SDL_FSOPS_POSIX 1)
+  sdl_sources("${SDL3_SOURCE_DIR}/src/filesystem/posix/SDL_sysfsops.c")
+  set(HAVE_SDL_FSOPS TRUE)
+
+  set(SDL_FSOPS_POSIX 1)
+  sdl_sources("${SDL3_SOURCE_DIR}/src/filesystem/posix/SDL_sysfsops.c")
+  set(HAVE_SDL_FSOPS TRUE)
+
   set(SDL_TIMER_UNIX 1)
   sdl_glob_sources("${SDL3_SOURCE_DIR}/src/timer/unix/*.c")
   set(HAVE_SDL_TIMERS TRUE)
@@ -2491,6 +2536,10 @@ elseif(VITA)
   sdl_glob_sources("${SDL3_SOURCE_DIR}/src/filesystem/vita/*.c")
   set(HAVE_SDL_FILESYSTEM TRUE)
 
+  # !!! FIXME: do we need a FSops implementation for this?
+
+  # !!! FIXME: do we need a FSops implementation for this?
+
   if(SDL_JOYSTICK)
     set(SDL_JOYSTICK_VITA 1)
     sdl_glob_sources("${SDL3_SOURCE_DIR}/src/joystick/vita/*.c")
@@ -2625,6 +2674,10 @@ elseif(PSP)
   sdl_glob_sources("${SDL3_SOURCE_DIR}/src/filesystem/psp/*.c")
   set(HAVE_SDL_FILESYSTEM TRUE)
 
+  # !!! FIXME: do we need a FSops implementation for this?
+
+  # !!! FIXME: do we need a FSops implementation for this?
+
   if(SDL_JOYSTICK)
     set(SDL_JOYSTICK_PSP 1)
     sdl_glob_sources("${SDL3_SOURCE_DIR}/src/joystick/psp/*.c")
@@ -2688,6 +2741,10 @@ elseif(PS2)
   sdl_glob_sources("${SDL3_SOURCE_DIR}/src/filesystem/ps2/*.c")
   set(HAVE_SDL_FILESYSTEM TRUE)
 
+  # !!! FIXME: do we need a FSops implementation for this?
+
+  # !!! FIXME: do we need a FSops implementation for this?
+
   if(SDL_JOYSTICK)
     set(SDL_JOYSTICK_PS2 1)
     sdl_glob_sources("${SDL3_SOURCE_DIR}/src/joystick/ps2/*.c")
@@ -2739,6 +2796,10 @@ elseif(N3DS)
   sdl_glob_sources("${SDL3_SOURCE_DIR}/src/filesystem/n3ds/*.c")
   set(HAVE_SDL_FILESYSTEM TRUE)
 
+  # !!! FIXME: do we need a FSops implementation for this?
+
+  # !!! FIXME: do we need a FSops implementation for this?
+
   if(SDL_JOYSTICK)
     set(SDL_JOYSTICK_N3DS 1)
     sdl_glob_sources("${SDL3_SOURCE_DIR}/src/joystick/n3ds/*.c")
@@ -2763,6 +2824,10 @@ elseif(N3DS)
   sdl_glob_sources("${SDL3_SOURCE_DIR}/src/timer/n3ds/*.c")
   set(HAVE_SDL_TIMERS TRUE)
 
+  set(SDL_FSOPS_POSIX 1)
+  sdl_sources("${SDL3_SOURCE_DIR}/src/filesystem/posix/SDL_sysfsops.c")
+  set(HAVE_SDL_FSOPS TRUE)
+
   if(SDL_SENSOR)
     set(SDL_SENSOR_N3DS 1)
     sdl_glob_sources("${SDL3_SOURCE_DIR}/src/sensor/n3ds/*.c")
@@ -2850,6 +2915,14 @@ if(NOT HAVE_SDL_STORAGE)
   set(SDL_STORAGE_GENERIC 1)
   sdl_glob_sources("${SDL3_SOURCE_DIR}/src/storage/generic/*.c")
 endif()
+if(NOT HAVE_SDL_FSOPS)
+  set(SDL_FSOPS_DUMMY 1)
+  sdl_sources("${SDL3_SOURCE_DIR}/src/filesystem/dummy/SDL_sysfsops.c")
+endif()
+if(NOT HAVE_SDL_FSOPS)
+  set(SDL_FSOPS_DUMMY 1)
+  sdl_sources("${SDL3_SOURCE_DIR}/src/filesystem/dummy/SDL_sysfsops.c")
+endif()
 if(NOT HAVE_SDL_LOCALE)
   set(SDL_LOCALE_DUMMY 1)
   sdl_glob_sources("${SDL3_SOURCE_DIR}/src/locale/dummy/*.c")