From ea0d619daeb8f2c5427287e71fd5fc904b00e805 Mon Sep 17 00:00:00 2001
From: Howard Chu <hyc@openldap.org>
Date: Sat, 6 Mar 2004 12:41:29 +0000
Subject: [PATCH] Store IDs in BeigEndian format on disk

---
 servers/slapd/back-bdb/dbcache.c  |  1 -
 servers/slapd/back-bdb/id2entry.c | 35 +++++++++++++++++++++++++------
 servers/slapd/back-bdb/init.c     | 32 ----------------------------
 3 files changed, 29 insertions(+), 39 deletions(-)

diff --git a/servers/slapd/back-bdb/dbcache.c b/servers/slapd/back-bdb/dbcache.c
index 23d964deaa..3ce25895a7 100644
--- a/servers/slapd/back-bdb/dbcache.c
+++ b/servers/slapd/back-bdb/dbcache.c
@@ -118,7 +118,6 @@ bdb_db_cache(
 	rc = db->bdi_db->set_h_hash( db->bdi_db, bdb_db_hash );
 #endif
 	rc = db->bdi_db->set_flags( db->bdi_db, DB_DUP | DB_DUPSORT );
-	rc = db->bdi_db->set_dup_compare( db->bdi_db, bdb_bt_compare );
 
 	file = ch_malloc( strlen( name ) + sizeof(BDB_SUFFIX) );
 	sprintf( file, "%s" BDB_SUFFIX, name );
diff --git a/servers/slapd/back-bdb/id2entry.c b/servers/slapd/back-bdb/id2entry.c
index fce1fcdc63..13f958dd46 100644
--- a/servers/slapd/back-bdb/id2entry.c
+++ b/servers/slapd/back-bdb/id2entry.c
@@ -32,7 +32,9 @@ static int bdb_id2entry_put(
 	DB *db = bdb->bi_id2entry->bdi_db;
 	DBT key, data;
 	struct berval bv;
-	int rc;
+	char buf[sizeof(ID)];
+	ID tmp;
+	int i, rc;
 #ifdef BDB_HIER
 	struct berval odn, ondn;
 
@@ -44,9 +46,16 @@ static int bdb_id2entry_put(
 	e->e_nname = slap_empty_bv;
 #endif
 	DBTzero( &key );
-	key.data = (char *) &e->e_id;
+	key.data = buf;
 	key.size = sizeof(ID);
 
+	/* Set key in BigEndian order */
+	tmp = e->e_id;
+	for ( i=sizeof(ID)-1; i>=0; i-- ) {
+		buf[i] = tmp & 0xff;
+		tmp >>= 8;
+	}
+
 	rc = entry_encode( e, &bv );
 #ifdef BDB_HIER
 	e->e_name = odn; e->e_nname = ondn;
@@ -96,13 +105,20 @@ int bdb_id2entry(
 	DB *db = bdb->bi_id2entry->bdi_db;
 	DBT key, data;
 	struct berval bv;
-	int rc = 0, ret = 0;
+	char buf[sizeof(ID)];
+	ID tmp;
+	int i, rc = 0, ret = 0;
 
 	*e = NULL;
 
 	DBTzero( &key );
-	key.data = (char *) &id;
+	key.data = buf;
 	key.size = sizeof(ID);
+	tmp = id;
+	for ( i=sizeof(ID)-1; i>=0; i-- ) {
+		buf[i] = tmp & 0xff;
+		tmp >>= 8;
+	}
 
 	DBTzero( &data );
 	data.flags = DB_DBT_MALLOC;
@@ -138,11 +154,18 @@ int bdb_id2entry_delete(
 	struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 	DB *db = bdb->bi_id2entry->bdi_db;
 	DBT key;
-	int rc;
+	char buf[sizeof(ID)];
+	ID tmp;
+	int i, rc;
 
 	DBTzero( &key );
-	key.data = (char *) &e->e_id;
+	key.data = buf;
 	key.size = sizeof(ID);
+	tmp = e->e_id;
+	for ( i=sizeof(ID)-1; i>=0; i-- ) {
+		buf[i] = tmp & 0xff;
+		tmp >>= 8;
+	}
 
 	/* delete from database */
 	rc = db->del( db, tid, &key, 0 );
diff --git a/servers/slapd/back-bdb/init.c b/servers/slapd/back-bdb/init.c
index 7be4e2d954..f037eaf6ee 100644
--- a/servers/slapd/back-bdb/init.c
+++ b/servers/slapd/back-bdb/init.c
@@ -114,32 +114,6 @@ bdb_db_init( BackendDB *be )
 	return 0;
 }
 
-int
-bdb_bt_compare(
-	DB *db, 
-	const DBT *usrkey,
-	const DBT *curkey
-)
-{
-	unsigned char *u, *c;
-	int i, x;
-
-	u = usrkey->data;
-	c = curkey->data;
-
-#ifdef WORDS_BIGENDIAN
-	for( i = 0; i < (int)sizeof(ID); i++)
-#else
-	for( i = sizeof(ID)-1; i >= 0; i--)
-#endif
-	{
-		x = u[i] - c[i];
-		if( x ) return x;
-	}
-
-	return 0;
-}
-
 static int
 bdb_db_open( BackendDB *be )
 {
@@ -372,8 +346,6 @@ bdb_db_open( BackendDB *be )
 		}
 
 		if( i == BDB_ID2ENTRY ) {
-			rc = db->bdi_db->set_bt_compare( db->bdi_db,
-				bdb_bt_compare );
 			rc = db->bdi_db->set_pagesize( db->bdi_db,
 				BDB_ID2ENTRY_PAGESIZE );
 			if ( slapMode & SLAP_TOOL_READMAIN ) {
@@ -385,8 +357,6 @@ bdb_db_open( BackendDB *be )
 			rc = db->bdi_db->set_flags( db->bdi_db, 
 				DB_DUP | DB_DUPSORT );
 #ifndef BDB_HIER
-			rc = db->bdi_db->set_dup_compare( db->bdi_db,
-				bdb_bt_compare );
 			if ( slapMode & SLAP_TOOL_READONLY ) {
 				flags |= DB_RDONLY;
 			} else {
@@ -395,8 +365,6 @@ bdb_db_open( BackendDB *be )
 #else
 			rc = db->bdi_db->set_dup_compare( db->bdi_db,
 				bdb_dup_compare );
-			rc = db->bdi_db->set_bt_compare( db->bdi_db,
-				bdb_bt_compare );
 			if ( slapMode & (SLAP_TOOL_READONLY|SLAP_TOOL_READMAIN) ) {
 				flags |= DB_RDONLY;
 			} else {
-- 
2.39.5