switch: add filesystem support

CMakeLists.txt

@@ -1996,14 +1996,12 @@ elseif(NINTENDO_SWITCH)
     set(SOURCE_FILES ${SOURCE_FILES} ${SWITCH_AUDIO_SOURCES})
     set(HAVE_SDL_AUDIO TRUE)
   endif()
-  #[[
   if(SDL_FILESYSTEM)
     set(SDL_FILESYSTEM_SWITCH 1)
     file(GLOB SWITCH_FILESYSTEM_SOURCES ${SDL2_SOURCE_DIR}/src/filesystem/switch/*.c)
     set(SOURCE_FILES ${SOURCE_FILES} ${SWITCH_FILESYSTEM_SOURCES})
     set(HAVE_SDL_FILESYSTEM TRUE)
   endif()
-  ]]
   if(SDL_JOYSTICK)
     set(SDL_JOYSTICK_SWITCH 1)
     file(GLOB SWITCH_JOYSTICK_SOURCES ${SDL2_SOURCE_DIR}/src/joystick/switch/*.c)

src/filesystem/switch/SDL_sysfilesystem.c

@@ -0,0 +1,88 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2020 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_internal.h"
+
+#ifdef SDL_FILESYSTEM_SWITCH
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+/* System dependent filesystem routines                                */
+
+#include <limits.h>
+#include <fcntl.h>
+
+#include "SDL_error.h"
+#include "SDL_stdinc.h"
+#include "SDL_filesystem.h"
+
+char *
+SDL_GetBasePath(void)
+{
+    const char *basepath = "romfs:/";
+    char *retval = SDL_strdup(basepath);
+    return retval;
+}
+
+char *
+SDL_GetPrefPath(const char *org, const char *app)
+{
+    const char *envr = "sdmc:/switch/";
+    char *retval = NULL;
+    char *ptr = NULL;
+    size_t len = 0;
+
+    if (!app) {
+        SDL_InvalidParamError("app");
+        return NULL;
+    }
+    if (!org) {
+        org = "";
+    }
+
+    len = SDL_strlen(envr);
+
+    len += SDL_strlen(org) + SDL_strlen(app) + 3;
+    retval = (char *) SDL_malloc(len);
+    if (!retval) {
+        SDL_OutOfMemory();
+        return NULL;
+    }
+
+    if (*org) {
+        SDL_snprintf(retval, len, "%s%s/%s/", envr, org, app);
+    } else {
+        SDL_snprintf(retval, len, "%s%s/", envr, app);
+    }
+
+    for (ptr = retval+1; *ptr; ptr++) {
+        if (*ptr == '/') {
+            *ptr = '\0';
+            mkdir(retval, 0777);
+            *ptr = '/';
+        }
+    }
+    mkdir(retval, 0777);
+
+    return retval;
+}
+
+#endif /* SDL_FILESYSTEM_SWITCH */
+
+/* vi: set ts=4 sw=4 expandtab: */