Added SDL_GetBasePath() and SDL_GetPrefPath() in new filesystem module.

--HG--
extra : rebase_source : c1fac232063443a2880e64f1abda85e0bdb2e710

src/filesystem/windows/SDL_sysfilesystem.c

@@ -0,0 +1,96 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2013 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_config.h"
+
+#ifdef SDL_FILESYSTEM_WINDOWS
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+/* System dependent filesystem routines                                */
+
+#include "SDL_error.h"
+#include "SDL_windows.h"
+#include "SDL_stdinc.h"
+#include "SDL_filesystem.h"
+
+char *
+SDL_GetBasePath(void)
+{
+    TCHAR path[MAX_PATH];
+    const DWORD len = GetModuleFileName(NULL, path, SDL_arraysize(path));
+    size_t i;
+
+    SDL_assert(len < SDL_arraysize(path));
+
+    if (len == 0) {
+        WIN_SetError("Couldn't locate our .exe");
+        return NULL;
+    }
+
+    for (i = len-1; i > 0; i--) {
+        if (path[i] == '\\') {
+            break;
+        }
+    }
+
+    SDL_assert(i > 0); /* Should have been an absolute path. */
+    path[i+1] = '\0';  /* chop off filename. */
+    return WIN_StringToUTF8(path);
+}
+
+char *
+SDL_GetPrefPath(const char *org, const char *app)
+{
+    /*
+     * Vista and later has a new API for this, but SHGetFolderPath works there,
+     *  and apparently just wraps the new API. This is the new way to do it:
+     *
+     *     SHGetKnownFolderPath(FOLDERID_RoamingAppData, KF_FLAG_CREATE,
+     *                          NULL, &wszPath);
+     */
+
+    TCHAR path[MAX_PATH];
+    char *utf8 = NULL;
+    char *retval = NULL;
+
+    if (!SUCCEEDED(SHGetFolderPath(NULL, CSIDL_APPDATA | CSIDL_FLAG_CREATE, NULL, 0, path))) {
+        WIN_SetError("Couldn't locate our prefpath");
+        return NULL;
+    }
+
+    utf8 = WIN_StringToUTF8(path);
+    if (utf8) {
+        const size_t len = SDL_strlen(utf8) + SDL_strlen(org) + SDL_strlen(app) + 4;
+        retval = (char *) SDL_malloc(len);
+        if (!retval) {
+            SDL_free(utf8);
+            SDL_OutOfMemory();
+            return NULL;
+        }
+        SDL_snprintf(retval, len, "%s\\%s\\%s\\", utf8, org, app);
+        SDL_free(utf8);
+    }
+
+    return retval;
+}
+
+#endif /* SDL_FILESYSTEM_WINDOWS */
+
+/* vi: set ts=4 sw=4 expandtab: */