/* attr.c - routines for dealing with attributes */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
 *
 * Copyright 1998-2004 The OpenLDAP Foundation.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted only as authorized by the OpenLDAP
 * Public License.
 *
 * A copy of this license is available in the file LICENSE in the
 * top-level directory of the distribution or, alternatively, at
 * <http://www.OpenLDAP.org/license.html>.
 */
/* Portions Copyright (c) 1995 Regents of the University of Michigan.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that this notice is preserved and that due credit is given
 * to the University of Michigan at Ann Arbor. The name of the University
 * may not be used to endorse or promote products derived from this
 * software without specific prior written permission. This software
 * is provided ``as is'' without express or implied warranty.
 */

#include "portable.h"

#include <stdio.h>

#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif

#include <ac/ctype.h>
#include <ac/errno.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/time.h>

#include "ldap_pvt.h"
#include "slap.h"

void
attr_free( Attribute *a )
{
	ber_bvarray_free( a->a_vals );
	if (a->a_nvals != a->a_vals) ber_bvarray_free( a->a_nvals );
	free( a );
}

void
attrs_free( Attribute *a )
{
	Attribute *next;

	for( ; a != NULL ; a = next ) {
		next = a->a_next;
		attr_free( a );
	}
}

Attribute *attr_dup( Attribute *a )
{
	Attribute *tmp;

	if( a == NULL) return NULL;

	tmp = ch_malloc( sizeof(Attribute) );

	if( a->a_vals != NULL ) {
		int i;

		for( i=0; a->a_vals[i].bv_val != NULL; i++ ) {
			/* EMPTY */ ;
		}

		tmp->a_vals = ch_malloc((i+1) * sizeof(struct berval));
		for( i=0; a->a_vals[i].bv_val != NULL; i++ ) {
			ber_dupbv( &tmp->a_vals[i], &a->a_vals[i] );
			if( tmp->a_vals[i].bv_val == NULL ) break;
		}
		tmp->a_vals[i].bv_val = NULL;

		if( a->a_nvals != a->a_vals ) {
			tmp->a_nvals = ch_malloc((i+1) * sizeof(struct berval));
			for( i=0; a->a_nvals[i].bv_val != NULL; i++ ) {
				ber_dupbv( &tmp->a_nvals[i], &a->a_nvals[i] );
				if( tmp->a_nvals[i].bv_val == NULL ) break;
			}
			tmp->a_nvals[i].bv_val = NULL;

		} else {
			tmp->a_nvals = tmp->a_vals;
		}

	} else {
		tmp->a_vals = NULL;
		tmp->a_nvals = NULL;
	}

	tmp->a_desc = a->a_desc;
	tmp->a_next = NULL;
	tmp->a_flags = 0;

	return tmp;
}

Attribute *attrs_dup( Attribute *a )
{
	Attribute *tmp, **next;

	if( a == NULL ) return NULL;

	tmp = NULL;
	next = &tmp;

	for( ; a != NULL ; a = a->a_next ) {
		*next = attr_dup( a );
		next = &((*next)->a_next);
	}
	*next = NULL;

	return tmp;
}



/*
 * attr_merge - merge the given type and value with the list of
 * attributes in attrs.
 *
 * nvals must be NULL if the attribute has no normalizer.
 * In this case, a->a_nvals will be set equal to a->a_vals.
 *
 * returns	0	everything went ok
 *		-1	trouble
 */

int
attr_merge(
	Entry		*e,
	AttributeDescription *desc,
	BerVarray	vals,
	BerVarray	nvals )
{
	int rc;

	Attribute	**a;

	for ( a = &e->e_attrs; *a != NULL; a = &(*a)->a_next ) {
		if ( ad_cmp( (*a)->a_desc, desc ) == 0 ) {
			break;
		}
	}

	if ( *a == NULL ) {
		*a = (Attribute *) ch_malloc( sizeof(Attribute) );
		(*a)->a_desc = desc;
		(*a)->a_vals = NULL;
		(*a)->a_nvals = NULL;
		(*a)->a_next = NULL;
		(*a)->a_flags = 0;
	}

	rc = value_add( &(*a)->a_vals, vals );

	if( !rc && nvals ) rc = value_add( &(*a)->a_nvals, nvals );
	else (*a)->a_nvals = (*a)->a_vals;

	return rc;
}

int
attr_merge_normalize(
	Entry		*e,
	AttributeDescription *desc,
	BerVarray	vals,
	void	 *memctx )
{
	BerVarray	nvals = NULL;
	int		rc;

	if ( desc->ad_type->sat_equality &&
		desc->ad_type->sat_equality->smr_normalize )
	{
		int	i;
		
		for ( i = 0; vals[i].bv_val; i++ );

		nvals = slap_sl_calloc( sizeof(struct berval), i + 1, memctx );
		for ( i = 0; vals[i].bv_val; i++ ) {
			rc = (*desc->ad_type->sat_equality->smr_normalize)(
					SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
					desc->ad_type->sat_syntax,
					desc->ad_type->sat_equality,
					&vals[i], &nvals[i], memctx );

			if ( rc != LDAP_SUCCESS ) {
				nvals[i+1].bv_val = NULL;
				goto error_return;
			}
		}
		nvals[i].bv_val = NULL;
	}

	rc = attr_merge( e, desc, vals, nvals );

error_return:;
	if ( nvals != NULL ) {
		ber_bvarray_free_x( nvals, memctx );
	}
	return rc;
}

int
attr_merge_one(
	Entry		*e,
	AttributeDescription *desc,
	struct berval	*val,
	struct berval	*nval )
{
	int rc;
	Attribute	**a;

	for ( a = &e->e_attrs; *a != NULL; a = &(*a)->a_next ) {
		if ( ad_cmp( (*a)->a_desc, desc ) == 0 ) {
			break;
		}
	}

	if ( *a == NULL ) {
		*a = (Attribute *) ch_malloc( sizeof(Attribute) );
		(*a)->a_desc = desc;
		(*a)->a_vals = NULL;
		(*a)->a_nvals = NULL;
		(*a)->a_next = NULL;
		(*a)->a_flags = 0;
	}

	rc = value_add_one( &(*a)->a_vals, val );

	if( !rc && nval ) rc = value_add_one( &(*a)->a_nvals, nval );
	else (*a)->a_nvals = (*a)->a_vals;
	return rc;
}

int
attr_merge_normalize_one(
	Entry		*e,
	AttributeDescription *desc,
	struct berval	*val,
	void		*memctx )
{
	struct berval	nval;
	struct berval	*nvalp;
	int		rc;

	if ( desc->ad_type->sat_equality &&
		desc->ad_type->sat_equality->smr_normalize )
	{
		rc = (*desc->ad_type->sat_equality->smr_normalize)(
				SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
				desc->ad_type->sat_syntax,
				desc->ad_type->sat_equality,
				val, &nval, memctx );

		if ( rc != LDAP_SUCCESS ) {
			return rc;
		}
		nvalp = &nval;
	} else {
		nvalp = NULL;
	}

	rc = attr_merge_one( e, desc, val, nvalp );
	if ( nvalp != NULL ) {
		slap_sl_free( nval.bv_val, memctx );
	}
	return rc;
}

/*
 * attrs_find - find attribute(s) by AttributeDescription
 * returns next attribute which is subtype of provided description.
 */

Attribute *
attrs_find(
    Attribute	*a,
	AttributeDescription *desc )
{
	for ( ; a != NULL; a = a->a_next ) {
		if ( is_ad_subtype( a->a_desc, desc ) ) {
			return( a );
		}
	}

	return( NULL );
}

/*
 * attr_find - find attribute by type
 */

Attribute *
attr_find(
    Attribute	*a,
	AttributeDescription *desc )
{
	for ( ; a != NULL; a = a->a_next ) {
		if ( ad_cmp( a->a_desc, desc ) == 0 ) {
			return( a );
		}
	}

	return( NULL );
}

/*
 * attr_delete - delete the attribute type in list pointed to by attrs
 * return	0	deleted ok
 * 		1	not found in list a
 * 		-1	something bad happened
 */

int
attr_delete(
    Attribute	**attrs,
	AttributeDescription *desc )
{
	Attribute	**a;

	for ( a = attrs; *a != NULL; a = &(*a)->a_next ) {
		if ( ad_cmp( (*a)->a_desc, desc ) == 0 ) {
			Attribute	*save = *a;
			*a = (*a)->a_next;
			attr_free( save );

			return LDAP_SUCCESS;
		}
	}

	return LDAP_NO_SUCH_ATTRIBUTE;
}