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/edgehash.c b/source/blender/blenlib/intern/edgehash.c
index 8558e5773c7..51a22cc46ab 100644
--- a/source/blender/blenlib/intern/edgehash.c
+++ b/source/blender/blenlib/intern/edgehash.c
@@ -356,6 +356,16 @@ void *BLI_edgehash_lookup(EdgeHash *eh, unsigned int v0, unsigned int v1)
 }
 
 /**
+ * A version of #BLI_edgehash_lookup which accepts a fallback argument.
+ */
+void *BLI_edgehash_lookup_default(EdgeHash *eh, unsigned int v0, unsigned int v1, void *val_default)
+{
+	EdgeEntry *e = edgehash_lookup_entry(eh, v0, v1);
+	IS_EDGEHASH_ASSERT(eh);
+	return e ? e->val : val_default;
+}
+
+/**
  * Return boolean true/false if edge (v0,v1) in hash.
  */
 bool BLI_edgehash_haskey(EdgeHash *eh, unsigned int v0, unsigned int v1)