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https://git.openldap.org/openldap/openldap.git
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160 lines
3.2 KiB
C
160 lines
3.2 KiB
C
/* $OpenLDAP$ */
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/*
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* Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
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* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
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*/
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/* Portions
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* Copyright (c) 1994 Regents of the University of Michigan.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that this notice is preserved and that due credit is given
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* to the University of Michigan at Ann Arbor. The name of the University
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* may not be used to endorse or promote products derived from this
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* software without specific prior written permission. This software
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* is provided ``as is'' without express or implied warranty.
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*
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* sort.c: LDAP library entry and value sort routines
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*/
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#include "portable.h"
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#include <stdio.h>
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#include <ac/stdlib.h>
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#include <ac/ctype.h>
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#include <ac/string.h>
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#include <ac/time.h>
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#include "ldap-int.h"
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struct entrything {
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char **et_vals;
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LDAPMessage *et_msg;
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int (*et_cmp_fn) LDAP_P((const char *a, const char *b));
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};
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static int et_cmp LDAP_P(( const void *aa, const void *bb));
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int
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ldap_sort_strcasecmp(
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LDAP_CONST void *a,
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LDAP_CONST void *b
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)
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{
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return( strcasecmp( *(char *const *)a, *(char *const *)b ) );
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}
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static int
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et_cmp(
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const void *aa,
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const void *bb
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)
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{
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int i, rc;
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const struct entrything *a = (const struct entrything *)aa;
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const struct entrything *b = (const struct entrything *)bb;
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if ( a->et_vals == NULL && b->et_vals == NULL )
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return( 0 );
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if ( a->et_vals == NULL )
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return( -1 );
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if ( b->et_vals == NULL )
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return( 1 );
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for ( i = 0; a->et_vals[i] && b->et_vals[i]; i++ ) {
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if ( (rc = a->et_cmp_fn( a->et_vals[i], b->et_vals[i] )) != 0 ) {
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return( rc );
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}
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}
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if ( a->et_vals[i] == NULL && b->et_vals[i] == NULL )
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return( 0 );
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if ( a->et_vals[i] == NULL )
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return( -1 );
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return( 1 );
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}
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int
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ldap_sort_entries(
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LDAP *ld,
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LDAPMessage **chain,
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LDAP_CONST char *attr, /* NULL => sort by DN */
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int (*cmp) (LDAP_CONST char *, LDAP_CONST char *)
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)
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{
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int i, count;
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struct entrything *et;
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LDAPMessage *e, *last;
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LDAPMessage **ep;
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assert( ld != NULL );
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count = ldap_count_entries( ld, *chain );
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if ( count < 0 ) {
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return -1;
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} else if ( count < 2 ) {
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/* zero or one entries -- already sorted! */
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return 0;
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}
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if ( (et = (struct entrything *) LDAP_MALLOC( count *
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sizeof(struct entrything) )) == NULL ) {
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ld->ld_errno = LDAP_NO_MEMORY;
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return( -1 );
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}
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e = *chain;
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for ( i = 0; i < count; i++ ) {
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et[i].et_cmp_fn = cmp;
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et[i].et_msg = e;
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if ( attr == NULL ) {
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char *dn;
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dn = ldap_get_dn( ld, e );
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et[i].et_vals = ldap_explode_dn( dn, 1 );
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LDAP_FREE( dn );
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} else {
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et[i].et_vals = ldap_get_values( ld, e, attr );
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}
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e = e->lm_chain;
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}
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last = e;
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qsort( et, count, sizeof(struct entrything), et_cmp );
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ep = chain;
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for ( i = 0; i < count; i++ ) {
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*ep = et[i].et_msg;
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ep = &(*ep)->lm_chain;
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LDAP_VFREE( et[i].et_vals );
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}
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*ep = last;
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LDAP_FREE( (char *) et );
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return( 0 );
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}
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int
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ldap_sort_values(
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LDAP *ld,
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char **vals,
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int (*cmp) (LDAP_CONST void *, LDAP_CONST void *)
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)
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{
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int nel;
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for ( nel = 0; vals[nel] != NULL; nel++ )
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; /* NULL */
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qsort( vals, nel, sizeof(char *), cmp );
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return( 0 );
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}
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