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/*
ldb database library
Copyright (C) Andrew Tridgell 2004
** NOTE! The following LGPL license applies to the ldb
** library. This does NOT imply that all of Samba is released
** under the LGPL
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Name: ldb
*
* Component: ldb message component utility functions
*
* Description: functions for manipulating ldb_message structures
*
* Author: Andrew Tridgell
*/
#include "includes.h"
/*
find an element in a message by attribute name
*/
struct ldb_message_element *ldb_msg_find_element(const struct ldb_message *msg,
const char *attr_name)
{
int i;
for (i=0;i<msg->num_elements;i++) {
if (ldb_attr_cmp(msg->elements[i].name, attr_name) == 0) {
return &msg->elements[i];
}
}
return NULL;
}
/*
see if two ldb_val structures contain exactly the same data
return 1 for a match, 0 for a mis-match
*/
int ldb_val_equal_exact(const struct ldb_val *v1, const struct ldb_val *v2)
{
if (v1->length != v2->length) return 0;
if (v1->length == 0) return 1;
if (memcmp(v1->data, v2->data, v1->length) == 0) {
return 1;
}
return 0;
}
/*
find a value in an element
assumes case sensitive comparison
*/
struct ldb_val *ldb_msg_find_val(const struct ldb_message_element *el,
struct ldb_val *val)
{
int i;
for (i=0;i<el->num_values;i++) {
if (ldb_val_equal_exact(val, &el->values[i])) {
return &el->values[i];
}
}
return NULL;
}
/*
add an empty element to a message
*/
int ldb_msg_add_empty(struct ldb_context *ldb,
struct ldb_message *msg, const char *attr_name, int flags)
{
struct ldb_message_element *els;
els = ldb_realloc_p(ldb, msg->elements,
struct ldb_message_element, msg->num_elements+1);
if (!els) {
errno = ENOMEM;
return -1;
}
els[msg->num_elements].values = NULL;
els[msg->num_elements].num_values = 0;
els[msg->num_elements].flags = flags;
els[msg->num_elements].name = ldb_strdup(ldb, attr_name);
if (!els[msg->num_elements].name) {
return -1;
}
msg->elements = els;
msg->num_elements++;
return 0;
}
/*
add an empty element to a message
*/
int ldb_msg_add(struct ldb_context *ldb,
struct ldb_message *msg,
const struct ldb_message_element *el,
int flags)
{
if (ldb_msg_add_empty(ldb, msg, el->name, flags) != 0) {
return -1;
}
msg->elements[msg->num_elements-1] = *el;
msg->elements[msg->num_elements-1].flags = flags;
return 0;
}
/*
compare two ldb_message_element structures
assumes case senistive comparison
*/
int ldb_msg_element_compare(struct ldb_message_element *el1,
struct ldb_message_element *el2)
{
int i;
if (el1->num_values != el2->num_values) {
return el1->num_values - el2->num_values;
}
for (i=0;i<el1->num_values;i++) {
if (!ldb_msg_find_val(el2, &el1->values[i])) {
return -1;
}
}
return 0;
}
/*
convenience functions to return common types from a message
these return the first value if the attribute is multi-valued
*/
int ldb_msg_find_int(const struct ldb_message *msg,
const char *attr_name,
int default_value)
{
struct ldb_message_element *el = ldb_msg_find_element(msg, attr_name);
if (!el || el->num_values == 0) {
return default_value;
}
return strtol(el->values[0].data, NULL, 0);
}
unsigned int ldb_msg_find_uint(const struct ldb_message *msg,
const char *attr_name,
int default_value)
{
struct ldb_message_element *el = ldb_msg_find_element(msg, attr_name);
if (!el || el->num_values == 0) {
return default_value;
}
return strtoul(el->values[0].data, NULL, 0);
}
double ldb_msg_find_double(const struct ldb_message *msg,
const char *attr_name,
double default_value)
{
struct ldb_message_element *el = ldb_msg_find_element(msg, attr_name);
if (!el || el->num_values == 0) {
return default_value;
}
return strtod(el->values[0].data, NULL);
}
const char *ldb_msg_find_string(const struct ldb_message *msg,
const char *attr_name,
const char *default_value)
{
struct ldb_message_element *el = ldb_msg_find_element(msg, attr_name);
if (!el || el->num_values == 0) {
return default_value;
}
return el->values[0].data;
}
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