From 7fedf13e02e458b6f31cbf96d9fbb904e11efaa5 Mon Sep 17 00:00:00 2001
From: Howard Chu <hyc@openldap.org>
Date: Sun, 7 Dec 2003 11:15:22 +0000
Subject: [PATCH] ITS#2494 sort entries ahead of everything else

---
 libraries/libldap/sort.c | 36 ++++++++++++++++++++++++++----------
 tests/data/referrals.out | 24 ++++++++++++------------
 2 files changed, 38 insertions(+), 22 deletions(-)

diff --git a/libraries/libldap/sort.c b/libraries/libldap/sort.c
index 579cb35e32..2e5c09e021 100644
--- a/libraries/libldap/sort.c
+++ b/libraries/libldap/sort.c
@@ -92,20 +92,36 @@ ldap_sort_entries(
     int		(*cmp) (LDAP_CONST  char *, LDAP_CONST char *)
 )
 {
-	int			i, count;
+	int			i, count = 0;
 	struct entrything	*et;
-	LDAPMessage		*e, *last;
+	LDAPMessage		*e, *ehead = NULL, *etail = NULL;
+	LDAPMessage		*ohead = NULL, *otail = NULL;
 	LDAPMessage		**ep;
 
 	assert( ld != NULL );
 
-	count = ldap_count_entries( ld, *chain );
-
-	if ( count < 0 ) {
-		return -1;
+	/* Separate entries from non-entries */
+	for ( e = *chain; e; e=e->lm_chain ) {
+		if ( e->lm_msgtype == LDAP_RES_SEARCH_ENTRY ) {
+			count++;
+			if ( !ehead ) ehead = e;
+			if ( etail ) etail->lm_chain = e;
+			etail = e;
+		} else {
+			if ( !ohead ) ohead = e;
+			if ( otail ) otail->lm_chain = e;
+			otail = e;
+		}
+	}
 
-	} else if ( count < 2 ) {
+	if ( count < 2 ) {
 		/* zero or one entries -- already sorted! */
+		if ( ehead ) {
+			etail->lm_chain = ohead;
+			*chain = ehead;
+		} else {
+			*chain = ohead;
+		}
 		return 0;
 	}
 
@@ -115,7 +131,7 @@ ldap_sort_entries(
 		return( -1 );
 	}
 
-	e = *chain;
+	e = ehead;
 	for ( i = 0; i < count; i++ ) {
 		et[i].et_cmp_fn = cmp;
 		et[i].et_msg = e;
@@ -131,7 +147,6 @@ ldap_sort_entries(
 
 		e = e->lm_chain;
 	}
-	last = e;
 
 	qsort( et, count, sizeof(struct entrything), et_cmp );
 
@@ -142,7 +157,8 @@ ldap_sort_entries(
 
 		LDAP_VFREE( et[i].et_vals );
 	}
-	*ep = last;
+	*ep = ohead;
+		
 	LDAP_FREE( (char *) et );
 
 	return( 0 );
diff --git a/tests/data/referrals.out b/tests/data/referrals.out
index 1ed2e49b5d..4fac149bb5 100644
--- a/tests/data/referrals.out
+++ b/tests/data/referrals.out
@@ -93,6 +93,9 @@ result: 0 Success
 # requesting: 1.1 
 #
 
+# University of Michigan, US
+dn: o=University of Michigan,c=US
+
 # search reference
 ref: ldap://hostA/o=abc,c=us??base
 ref: ldap://hostB/o=ABC,c=US??base
@@ -100,9 +103,6 @@ ref: ldap://hostB/o=ABC,c=US??base
 # search reference
 ref: ldap://hostC/o=xyz,c=us??base
 
-# University of Michigan, US
-dn: o=University of Michigan,c=US
-
 # search result
 search: 2
 result: 0 Success
@@ -118,21 +118,21 @@ result: 0 Success
 # requesting: 1.1 
 #
 
-# search reference
-ref: ldap://hostA/o=abc,c=us??sub
-ref: ldap://hostB/o=ABC,c=US??sub
+# Manager, University of Michigan, US
+dn: cn=Manager,o=University of Michigan,c=US
 
-# search reference
-ref: ldap://hostC/o=xyz,c=us??sub
+# University of Michigan, US
+dn: o=University of Michigan,c=US
 
 # US
 dn: c=US
 
-# University of Michigan, US
-dn: o=University of Michigan,c=US
+# search reference
+ref: ldap://hostA/o=abc,c=us??sub
+ref: ldap://hostB/o=ABC,c=US??sub
 
-# Manager, University of Michigan, US
-dn: cn=Manager,o=University of Michigan,c=US
+# search reference
+ref: ldap://hostC/o=xyz,c=us??sub
 
 # search result
 search: 2
-- 
2.39.5