ITS#5057 replace AVA_Sort with insertion sort

diff --git a/servers/slapd/dn.c b/servers/slapd/dn.c
index 8bd440dd7e86572a01f18f458004174b2625c557..2f16b47bf5644c7c7989652f2aaed7d551f1cd63 100644 (file)
--- a/servers/slapd/dn.c
+++ b/servers/slapd/dn.c
@@ -228,70 +228,48 @@ rdnValidate(
  * Note: the sorting can be slightly improved by sorting first
  * by attribute type length, then by alphabetical order.
  *
- * uses a linear search; should be fine since the number of AVAs in
+ * uses an insertion sort; should be fine since the number of AVAs in
  * a RDN should be limited.
  */
 static void
-AVA_Sort( LDAPRDN rdn, int iAVA )
+AVA_Sort( LDAPRDN rdn, int nAVAs )
 {
+       LDAPAVA *ava_i;
        int             i;
-       LDAPAVA         *ava_in = rdn[ iAVA ];
 
        assert( rdn != NULL );
-       assert( ava_in != NULL );
-       
-       for ( i = 0; i < iAVA; i++ ) {
-               LDAPAVA         *ava = rdn[ i ];
-               int             a, j;
 
-               assert( ava != NULL );
+       for ( i = 1; i < nAVAs; i++ ) {
+               LDAPAVA *ava_j;
+               int j;
 
-               a = strcmp( ava_in->la_attr.bv_val, ava->la_attr.bv_val );
+               ava_i = rdn[ i ];
+               for ( j = i-1; j >=0; j-- ) {
+                       int a;
 
-               if ( a > 0 ) {
-                       continue;
-               }
+                       ava_j = rdn[ j ];
+                       a = strcmp( ava_i->la_attr.bv_val, ava_j->la_attr.bv_val );
 
-               while ( a == 0 ) {
-                       int             v, d;
+                       if ( a == 0 ) {
+                               int             d;
 
-                       d = ava_in->la_value.bv_len - ava->la_value.bv_len;
+                               d = ava_i->la_value.bv_len - ava_j->la_value.bv_len;
 
-                       v = memcmp( ava_in->la_value.bv_val, 
-                                       ava->la_value.bv_val,
-                                       d <= 0 ? ava_in->la_value.bv_len 
-                                               : ava->la_value.bv_len );
+                               a = memcmp( ava_i->la_value.bv_val, 
+                                               ava_j->la_value.bv_val,
+                                               d <= 0 ? ava_i->la_value.bv_len 
+                                                       : ava_j->la_value.bv_len );
 
-                       if ( v == 0 && d != 0 ) {
-                               v = d;
+                               if ( a == 0 && d != 0 ) {
+                                       a = d;
+                               }
                        }
-
-                       if ( v <= 0 ) {
-                               /* 
-                                * got it!
-                                */
+                       if ( a >= 0 )
                                break;
-                       }
-
-                       if ( ++i == iAVA ) {
-                               /*
-                                * already sorted
-                                */
-                               return;
-                       }
 
-                       ava = rdn[ i ];
-                       a = strcmp( ava_in->la_attr.bv_val, 
-                                       ava->la_attr.bv_val );
+                       rdn[ j+1 ] = rdn[ j ];
                }
-
-               /*
-                * move ahead
-                */
-               for ( j = iAVA; j > i; j-- ) {
-                       rdn[ j ] = rdn[ j - 1 ];
-               }
-               rdn[ i ] = ava_in;
+               rdn[ j+1 ] = ava_i;
        }
 }
 
@@ -299,8 +277,8 @@ static int
 LDAPRDN_rewrite( LDAPRDN rdn, unsigned flags, void *ctx )
 {
 
-       int rc;
-       int             iAVA;
+       int rc, iAVA, do_sort = 0;
+
        for ( iAVA = 0; rdn[ iAVA ]; iAVA++ ) {
                LDAPAVA                 *ava = rdn[ iAVA ];
                AttributeDescription    *ad;
@@ -309,7 +287,6 @@ LDAPRDN_rewrite( LDAPRDN rdn, unsigned flags, void *ctx )
                slap_syntax_transform_func *transf = NULL;
                MatchingRule *mr = NULL;
                struct berval           bv = BER_BVNULL;
-               int                     do_sort = 0;
 
                assert( ava != NULL );
 
@@ -413,9 +390,10 @@ LDAPRDN_rewrite( LDAPRDN rdn, unsigned flags, void *ctx )
                        ava->la_value = bv;
                        ava->la_flags |= LDAP_AVA_FREE_VALUE;
                }
-
-               if( do_sort ) AVA_Sort( rdn, iAVA );
        }
+       if ( do_sort )
+               AVA_Sort( rdn, iAVA );
+
        return LDAP_SUCCESS;
 }