hmapx: New function hmapx_is_empty().

[pspp-builds.git] / src / libpspp / hmapx.h

diff --git a/src/libpspp/hmapx.h b/src/libpspp/hmapx.h
index 32a4452fe2417d58157ca8da27e079f2052fcc88..d463504a52de33ca1a1cc45bde187dfaaadd71f7 100644 (file)
--- a/src/libpspp/hmapx.h
+++ b/src/libpspp/hmapx.h
@@ -1,5 +1,5 @@
 /* PSPP - a program for statistical analysis.
-   Copyright (C) 2008 Free Software Foundation, Inc.
+   Copyright (C) 2008, 2009 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -165,6 +165,7 @@ static inline struct hmapx_node *hmapx_next (const struct hmapx *,
                                              const struct hmapx_node *);
 
 /* Counting. */
+static inline bool hmapx_is_empty (const struct hmapx *);
 static inline size_t hmapx_count (const struct hmapx *);
 static inline size_t hmapx_capacity (const struct hmapx *);
 
@@ -404,6 +405,14 @@ hmapx_next (const struct hmapx *map, const struct hmapx_node *node)
   return HMAP_NEXT (node, struct hmapx_node, hmap_node, &map->hmap);
 }
 
+/* Returns true if MAP currently contains no data items, false
+   otherwise. */
+static inline bool
+hmapx_is_empty (const struct hmapx *map)
+{
+  return hmap_is_empty (&map->hmap);
+}
+
 /* Returns the number of data items currently in MAP. */
 static inline size_t
 hmapx_count (const struct hmapx *map)