revise hashvector_contents to optionally create the target vector

[rrq/rrqmisc.git] / vector / integeritem.c

diff --git a/vector/integeritem.c b/vector/integeritem.c
index 6e6ac04659966c73c62a07410a722603f592e623..ae4db929ae95c4bd358ac516e111864641bb38fe 100644 (file)
--- a/vector/integeritem.c
+++ b/vector/integeritem.c
@@ -36,9 +36,18 @@ static void *integeritem_itemkey(void *this,void *item) {
 static void integeritem_releasekey(void *this,void *key) {
 }
 
+/**
+ * This callback function writes a representation of an item into
+ * a character buffer.
+ */
+static int integeritem_tostring(void *this,void *item,char *buffer,int limit) {
+    return snprintf( buffer, limit, "%lld", (long long) item );
+}
+
 itemkeyfun integeritem = {
     .hashcode = integeritem_hashcode,
     .haskey = integeritem_haskey,
     .itemkey = integeritem_itemkey,
-    .releasekey = integeritem_releasekey
+    .releasekey = integeritem_releasekey,
+    .tostring = integeritem_tostring
 };