chore(build): use SDL3

vendor/sdl-3.2.10/src/filesystem/n3ds/SDL_sysfilesystem.c

@@ -0,0 +1,90 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 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_N3DS
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+// System dependent filesystem routines
+
+#include "../SDL_sysfilesystem.h"
+
+#include <3ds.h>
+#include <dirent.h>
+#include <errno.h>
+
+static char *MakePrefPath(const char *app);
+static bool CreatePrefPathDir(const char *pref);
+
+char *SDL_SYS_GetBasePath(void)
+{
+    char *base_path = SDL_strdup("romfs:/");
+    return base_path;
+}
+
+char *SDL_SYS_GetPrefPath(const char *org, const char *app)
+{
+    char *pref_path = NULL;
+    if (!app) {
+        SDL_InvalidParamError("app");
+        return NULL;
+    }
+
+    pref_path = MakePrefPath(app);
+    if (!pref_path) {
+        return NULL;
+    }
+
+    if (!CreatePrefPathDir(pref_path)) {
+        SDL_free(pref_path);
+        return NULL;
+    }
+
+    return pref_path;
+}
+
+// TODO
+char *SDL_SYS_GetUserFolder(SDL_Folder folder)
+{
+    SDL_Unsupported();
+    return NULL;
+}
+
+static char *MakePrefPath(const char *app)
+{
+    char *pref_path;
+    if (SDL_asprintf(&pref_path, "sdmc:/3ds/%s/", app) < 0) {
+        return NULL;
+    }
+    return pref_path;
+}
+
+static bool CreatePrefPathDir(const char *pref)
+{
+    int result = mkdir(pref, 0666);
+
+    if (result == -1 && errno != EEXIST) {
+        return SDL_SetError("Failed to create '%s' (%s)", pref, strerror(errno));
+    }
+    return true;
+}
+
+#endif // SDL_FILESYSTEM_N3DS