Add the SDL filesystem functions

The one giving you a safe path to save data is particularly
important for writing games.

2 files changed, 60 insertions, 0 deletions

diff --git a/c_src/esdl2.h b/c_src/esdl2.h
index 8024a9d..7af7097 100644
--- a/c_src/esdl2.h
+++ b/c_src/esdl2.h
@@ -115,6 +115,9 @@
 	F(set_clipboard_text, 1) \
 	/* sdl_events */ \
 	F(poll_event, 0) \
+	/* sdl_filesystem */ \
+	F(get_base_path, 0) \
+	F(get_pref_path, 2) \
 	/* sdl_power */ \
 	F(get_power_info, 0) \
 	/* sdl_renderer */ \
diff --git a/c_src/sdl_filesystem.c b/c_src/sdl_filesystem.c
new file mode 100644
index 0000000..cf6c601
--- /dev/null
+++ b/c_src/sdl_filesystem.c
@@ -0,0 +1,57 @@
+// Copyright (c) 2014, Loïc Hoguin <[email protected]>
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+#include "esdl2.h"
+
+// get_base_path
+
+NIF_FUNCTION(get_base_path)
+{
+	char* path;
+	ERL_NIF_TERM term;
+
+	path = SDL_GetBasePath();
+
+	if (!path)
+		return sdl_error_tuple(env);
+
+	term = enif_make_string(env, path, ERL_NIF_LATIN1);
+
+	SDL_free(path);
+
+	return term;
+}
+
+// get_pref_path
+
+NIF_FUNCTION(get_pref_path)
+{
+	char org[255], app[255];
+	char* path;
+	ERL_NIF_TERM term;
+
+	BADARG_IF(!enif_get_string(env, argv[0], org, 255, ERL_NIF_LATIN1));
+	BADARG_IF(!enif_get_string(env, argv[1], app, 255, ERL_NIF_LATIN1));
+
+	path = SDL_GetPrefPath(org, app);
+
+	if (!path)
+		return sdl_error_tuple(env);
+
+	term = enif_make_string(env, path, ERL_NIF_LATIN1);
+
+	SDL_free(path);
+
+	return term;
+}