new

1 files changed, 29 insertions, 0 deletions

diff --git a/src/libndb/ndbdiscard.c b/src/libndb/ndbdiscard.c
new file mode 100644
index 00000000..9b2fc0c9
--- /dev/null
+++ b/src/libndb/ndbdiscard.c
@@ -0,0 +1,29 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+#include <ndb.h>
+
+/* remove a from t and free it */
+Ndbtuple*
+ndbdiscard(Ndbtuple *t, Ndbtuple *a)
+{
+	Ndbtuple *nt;
+
+	/* unchain a */
+	for(nt = t; nt != nil; nt = nt->entry){
+		if(nt->line == a)
+			nt->line = a->line;
+		if(nt->entry == a)
+			nt->entry = a->entry;
+	}
+
+	/* a may be start of chain */
+	if(t == a)
+		t = a->entry;
+
+	/* free a */
+	a->entry = nil;
+	ndbfree(a);
+
+	return t;
+}