add SDL2 sources

thirdparty/SDL2-src/test/testfilesystem.c

@@ -0,0 +1,60 @@
+/*
+  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.
+*/
+/* Simple test of filesystem functions. */
+
+#include <stdio.h>
+#include "SDL.h"
+
+int
+main(int argc, char *argv[])
+{
+    char *base_path;
+    char *pref_path;
+
+    /* Enable standard application logging */
+    SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
+
+    if (SDL_Init(0) == -1) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_Init() failed: %s\n", SDL_GetError());
+        return 1;
+    }
+
+    base_path = SDL_GetBasePath();
+    if(base_path == NULL){
+      SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't find base path: %s\n",
+                   SDL_GetError());
+    } else {
+        SDL_Log("base path: '%s'\n", base_path);
+        SDL_free(base_path);
+    }
+
+    pref_path = SDL_GetPrefPath("libsdl", "testfilesystem");
+    if(pref_path == NULL){
+      SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't find pref path: %s\n",
+                   SDL_GetError());
+    } else {
+        SDL_Log("pref path: '%s'\n", pref_path);
+        SDL_free(pref_path);
+    }
+
+    pref_path = SDL_GetPrefPath(NULL, "testfilesystem");
+    if(pref_path == NULL){
+      SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't find pref path without organization: %s\n",
+                   SDL_GetError());
+    } else {
+        SDL_Log("pref path: '%s'\n", pref_path);
+        SDL_free(pref_path);
+    }
+
+    SDL_Quit();
+    return 0;
+}