path: add mp_find_config_file and reorganize some of the code

Add `mp_find_config_file` to search different known paths and use that in
ass_mp to look for the fontconfig configuration file.

Some incidental changes spawned by this feature where:

 * Buffer allocation for the strings containing the paths is now performed
   with talloc. All of the allocations are done on a NULL context, but it still
   improves readability of the code.
 * Move the OSX function for lookup inside of a bundle: this code path was
   currently not used by the bundle generated with `make osxbundle`. The plan
   is to use it again in a future commit to get a fontconfig config file.

2 files changed, 56 insertions, 0 deletions

diff --git a/osdep/macosx_bundle.h b/osdep/macosx_bundle.h
new file mode 100644
index 0000000000..fbb3383ad5
--- /dev/null
+++ b/osdep/macosx_bundle.h
@@ -0,0 +1,26 @@
+/*
+ * This file is part of mpv.
+ *
+ * mpv is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * mpv is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with mpv; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPV_MACOSX_BUNDLE
+#define MPV_MACOSX_BUNDLE
+
+// Returns absolute path of a resource file in a Mac OS X application bundle.
+char *get_bundled_path(const char *filename);
+
+#endif /* MPV_MACOSX_BUNDLE */
+
diff --git a/osdep/macosx_bundle.m b/osdep/macosx_bundle.m
new file mode 100644
index 0000000000..cef0fc550a
--- /dev/null
+++ b/osdep/macosx_bundle.m
@@ -0,0 +1,30 @@
+/*
+ * This file is part of mpv.
+ *
+ * mpv is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * mpv is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with mpv; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#import <Foundation/Foundation.h>
+#include "osdep/macosx_bundle.h"
+#include "core/path.h"
+
+char *get_bundled_path(const char *file)
+{
+  NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+  NSString *path = [[NSBundle mainBundle] resourcePath];
+  char *rv =  mp_path_join(NULL, bstr0([path UTF8String]), bstr0(file));
+  [pool release];
+  return rv;
+}