GHash, Edgehash: add lookup_default() funcs.

Returns a fallback argument when the key isn't found.

1 files changed, 10 insertions, 0 deletions

diff --git a/source/blender/blenlib/intern/BLI_ghash.c b/source/blender/blenlib/intern/BLI_ghash.c
index 1df48885637..7b48744bcdf 100644
--- a/source/blender/blenlib/intern/BLI_ghash.c
+++ b/source/blender/blenlib/intern/BLI_ghash.c
@@ -384,6 +384,16 @@ void *BLI_ghash_lookup(GHash *gh, const void *key)
 }
 
 /**
+ * A version of #BLI_ghash_lookup which accepts a fallback argument.
+ */
+void *BLI_ghash_lookup_default(GHash *gh, const void *key, void *val_default)
+{
+	Entry *e = ghash_lookup_entry(gh, key);
+	IS_GHASH_ASSERT(gh);
+	return e ? e->val : val_default;
+}
+
+/**
  * Lookup a pointer to the value of \a key in \a gh.
  *
  * \param key  The key to lookup.