mapper: add "pure" attributes

src/mapper.h

@@ -24,6 +24,7 @@
 #ifndef MPD_MAPPER_H
 #define MPD_MAPPER_H
 
+#include <glib.h>
 #include <stdbool.h>
 
 #define PLAYLIST_FILE_SUFFIX ".m3u"
@@ -38,6 +39,7 @@ void mapper_finish(void);
 /**
  * Returns true if a music directory was configured.
  */
+G_GNUC_CONST
 bool
 mapper_has_music_directory(void);
 
@@ -46,6 +48,7 @@ mapper_has_music_directory(void);
  * this function converts it to a relative path.  If not, it returns
  * the unmodified string pointer.
  */
+G_GNUC_PURE
 const char *
 map_to_relative_path(const char *path_utf8);
 
@@ -54,6 +57,7 @@ map_to_relative_path(const char *path_utf8);
  * is basically done by converting the URI to the file system charset
  * and prepending the music directory.
  */
+G_GNUC_MALLOC
 char *
 map_uri_fs(const char *uri);
 
@@ -63,6 +67,7 @@ map_uri_fs(const char *uri);
  * @param directory the directory object
  * @return the path in file system encoding, or NULL if mapping failed
  */
+G_GNUC_MALLOC
 char *
 map_directory_fs(const struct directory *directory);
 
@@ -74,6 +79,7 @@ map_directory_fs(const struct directory *directory);
  * @param name the child's name in UTF-8
  * @return the path in file system encoding, or NULL if mapping failed
  */
+G_GNUC_MALLOC
 char *
 map_directory_child_fs(const struct directory *directory, const char *name);
 
@@ -84,6 +90,7 @@ map_directory_child_fs(const struct directory *directory, const char *name);
  * @param song the song object
  * @return the path in file system encoding, or NULL if mapping failed
  */
+G_GNUC_MALLOC
 char *
 map_song_fs(const struct song *song);
 
@@ -94,12 +101,14 @@ map_song_fs(const struct song *song);
  * @param path_fs a path in file system encoding
  * @return the relative path in UTF-8, or NULL if mapping failed
  */
+G_GNUC_MALLOC
 char *
 map_fs_to_utf8(const char *path_fs);
 
 /**
  * Returns the playlist directory.
  */
+G_GNUC_CONST
 const char *
 map_spl_path(void);
 
@@ -110,6 +119,7 @@ map_spl_path(void);
  *
  * @return the path in file system encoding, or NULL if mapping failed
  */
+G_GNUC_PURE
 char *
 map_spl_utf8_to_fs(const char *name);