From 963c421a971cc4e95947f3ff20a70a6cc8c9cb5d Mon Sep 17 00:00:00 2001
From: Howard Chu <hyc@symas.com>
Date: Mon, 5 Sep 2011 14:22:46 -0700
Subject: [PATCH] Minor cleanup

---
 libraries/libmdb/mdb.c  | 28 +++++++++++++++++++++++-----
 libraries/libmdb/midl.c |  6 +++---
 libraries/libmdb/midl.h |  2 ++
 3 files changed, 28 insertions(+), 8 deletions(-)

diff --git a/libraries/libmdb/mdb.c b/libraries/libmdb/mdb.c
index 27f2387de2..bf09af860c 100644
--- a/libraries/libmdb/mdb.c
+++ b/libraries/libmdb/mdb.c
@@ -440,7 +440,7 @@ struct MDB_env {
 	pthread_key_t	me_txkey;	/* thread-key for readers */
 	MDB_dpage	*me_dpages;
 	pgno_t		me_free_pgs[MDB_IDL_UM_SIZE];
-	ID2			me_dirty_list[MDB_IDL_DB_SIZE];
+	ID2			me_dirty_list[MDB_IDL_UM_SIZE];
 	LAZY_RWLOCK_DEF(me_dblock);
 #ifdef _WIN32
 	HANDLE		me_rmutex;		/* Windows mutexes don't reside in shared mem */
@@ -2543,11 +2543,17 @@ mdb_cursor_set(MDB_cursor *cursor, MDB_val *key, MDB_val *data,
 		}
 		rc = cursor->mc_txn->mt_dbxs[cursor->mc_dbi].md_cmp(key, &nodekey);
 		if (rc == 0) {
+			/* Probably happens rarely, but first node on the page
+			 * was the one we wanted.
+			 */
+			top->mp_ki = 0;
 set1:
-			/* we're already on the right page */
 			mpp.mp_page = top->mp_page;
+			if (exactp)
+				*exactp = 1;
 			rc = 0;
-			goto set2;
+			leaf = NODEPTR(top->mp_page, top->mp_ki);
+			goto set3;
 		}
 		if (rc > 0) {
 			unsigned int i;
@@ -2560,7 +2566,17 @@ set1:
 					MDB_SET_KEY(leaf, &nodekey);
 				}
 				rc = cursor->mc_txn->mt_dbxs[cursor->mc_dbi].md_cmp(key, &nodekey);
-				if (rc <= 0) goto set1;
+				if (rc == 0) {
+					/* last node was the one we wanted */
+					top->mp_ki = NUMKEYS(top->mp_page)-1;
+					goto set1;
+				}
+				if (rc < 0) {
+					/* This is definitely the right page, skip search_page */
+					mpp.mp_page = top->mp_page;
+					rc = 0;
+					goto set2;
+				}
 			}
 			/* If any parents have right-sibs, search.
 			 * Otherwise, there's nothing further.
@@ -2571,7 +2587,8 @@ set1:
 					break;
 			if (i == cursor->mc_snum - 1) {
 				/* There are no other pages */
-				goto set1;
+				top->mp_ki = NUMKEYS(top->mp_page);
+				return MDB_NOTFOUND;
 			}
 		}
 	}
@@ -2603,6 +2620,7 @@ set2:
 		leaf = NODEPTR(mpp.mp_page, 0);
 	}
 
+set3:
 	cursor->mc_flags |= C_INITIALIZED;
 	cursor->mc_flags &= ~C_EOF;
 
diff --git a/libraries/libmdb/midl.c b/libraries/libmdb/midl.c
index 17b6e51f97..7932d3caee 100644
--- a/libraries/libmdb/midl.c
+++ b/libraries/libmdb/midl.c
@@ -28,7 +28,7 @@
  */
 #define CMP(x,y)	 ( (x) < (y) ? -1 : (x) > (y) )
 
-#if 0
+#if 0	/* superseded by append/sort */
 static unsigned mdb_midl_search( IDL ids, ID id )
 {
 	/*
@@ -119,7 +119,7 @@ int mdb_midl_insert( IDL ids, ID id )
 int mdb_midl_append( IDL ids, ID id )
 {
 	/* Too big? */
-	if (ids[0] >= MDB_IDL_UM_SIZE)
+	if (ids[0] >= MDB_IDL_UM_MAX)
 		return -1;
 	ids[0]++;
 	ids[ids[0]] = id;
@@ -244,7 +244,7 @@ int mdb_mid2l_insert( ID2L ids, ID2 *id )
 		return -1;
 	}
 
-	if ( ids[0].mid >= MDB_IDL_DB_MAX ) {
+	if ( ids[0].mid >= MDB_IDL_UM_MAX ) {
 		/* too big */
 		return -2;
 
diff --git a/libraries/libmdb/midl.h b/libraries/libmdb/midl.h
index 8e4a6e3c1b..7ef2cc53b2 100644
--- a/libraries/libmdb/midl.h
+++ b/libraries/libmdb/midl.h
@@ -101,12 +101,14 @@ typedef ID *IDL;
 #define MDB_IDL_N( ids )		( MDB_IDL_IS_RANGE(ids) \
 	? ((ids)[2]-(ids)[1])+1 : (ids)[0] )
 
+#if 0	/* superseded by append/sort */
 	/** Insert an ID into an IDL.
 	 * @param[in,out] ids	The IDL to insert into.
 	 * @param[in] id	The ID to insert.
 	 * @return	0 on success, -1 if the ID was already present in the IDL.
 	 */
 int mdb_midl_insert( IDL ids, ID id );
+#endif
 
 	/** Append an ID onto an IDL.
 	 * @param[in,out] ids	The IDL to append to.
-- 
2.39.2