1 files changed, 23 insertions, 0 deletions
diff --git a/src/libstddjb/cdb_nextkey.c b/src/libstddjb/cdb_nextkey.c
new file mode 100644
index 0000000..28925fe
--- /dev/null
+++ b/src/libstddjb/cdb_nextkey.c
@@ -0,0 +1,23 @@
+/* ISC license. */
+
+#include <skalibs/uint32.h>
+#include <skalibs/cdb.h>
+
+int cdb_nextkey (struct cdb *c, uint32 *kpos)
+{
+  char buf[8] ;
+  uint32 eod, klen ;
+  if (cdb_read(c, buf, 4, 0) < 0) return -1 ;
+  uint32_unpack(buf, &eod) ;
+  if (eod < 8 || eod - 8 < *kpos) return 0 ;
+  c->kpos = *kpos + 8 ;
+  if (c->kpos < *kpos) return -1 ; /* wraparound */
+  cdb_findstart(c) ;
+  c->hslots = 1 ;
+  if (cdb_read(c, buf, 8, *kpos) < 0) return -1 ;
+  uint32_unpack(buf, &klen) ;
+  uint32_unpack(buf + 4, &c->dlen) ;
+  c->dpos = c->kpos + klen ;
+  *kpos += 8 + klen + c->dlen ;
+  return 1 ;
+}