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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*LINTLIBRARY*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <stdarg.h>
#include <syslog.h>
#include <stdlib.h>
#include <strings.h>
#include <list.h>
static int _list_increment = 64; /* just so It can be tuned with adb(1) */
/*
* list_append() takes in a list (type **) and a pointer to an item to add
* to the list and returns a new list with the new item appended on the
* end. The list is NULL terminated. If there was an error, NULL is
* returned. For reasonable efficiency, the list will be allocated
* in blocks of size _list_increment.
*/
void **
list_append(void **list, void *item)
{
#ifdef DEBUG
syslog(LOG_DEBUG, "list_append(0x%x, 0x%x)", list, item);
#endif
if (item == NULL)
return (list);
if (list == NULL) {
list = (void **)calloc(_list_increment, sizeof (void *));
if (list != NULL)
list[0] = item;
} else {
int count;
for (count = 0; list[count] != NULL; count++)
;
if ((count + 1) % _list_increment == 0) { /* increase size */
void **new_list = NULL;
int new_size = (((count + 1) / _list_increment) + 1) *
_list_increment;
new_list = (void **)calloc(new_size, sizeof (void *));
if (new_list == NULL)
return (NULL);
for (count = 0; list[count] != NULL; count++)
new_list[count] = list[count];
free(list);
list = new_list;
}
list[count] = item;
}
return (list);
}
void **
list_append_unique(void **list, void *item, int (*cmp)(void *, void*))
{
if (list_locate(list, cmp, item))
return (list);
list = list_append(list, item);
return (list);
}
/*
* list_locate() iterates through the list passed in and uses the comparison
* routine and element passed in to find an element in the list. It
* returns the first element matched, or NULL if none exists
*/
void *
list_locate(void **list, int (*compair)(void *, void *), void *element)
{
int current = 0;
#ifdef DEBUG
syslog(LOG_DEBUG, "list_locate()");
#endif
if (list != NULL)
for (current = 0; list[current] != NULL; current++)
if ((compair)(list[current], element) == 0)
return (list[current]);
return (NULL);
}
/*
* list_concatenate() takes in two NULL terminated lists of items (type **)
* and creates a new list with items from list2 appended on the end of
* the list of items from list1. The result is a list (type **). If
* there is a failure, NULL is returned.
*/
void **
list_concatenate(void **list1, void **list2)
{
void **list = NULL;
int size1 = 0, size2 = 0, new_size = 0;
#ifdef DEBUG
syslog(LOG_DEBUG, "list_concatenate(0x%x, 0x%x)", list1, list2);
#endif
if ((list1 == NULL) || (list2 == NULL))
return ((list1 != NULL) ? list1 : list2);
for (size1 = 0; list1[size1] != NULL; size1++)
;
for (size2 = 0; list2[size2] != NULL; size2++)
;
/* list1 + list2 padded to a multiple of _list_increment */
new_size = ((size1 + size2)/_list_increment + 2) * _list_increment;
if ((list = (void **)calloc((new_size), sizeof (void *))) != NULL) {
int count = 0;
for (size1 = 0; list1[size1] != NULL; size1++)
list[count++] = list1[size1];
for (size2 = 0; list2[size2] != NULL; size2++)
list[count++] = list2[size2];
free(list1);
}
return (list);
}
/*
* list_iterate() take in a list, pointer to a function, and variable number
* of arguements following. list_iterate() will iterate through the list
* calling the functions passed in with the first argument being a pointer
* to the current item in the list and the second argument being a va_list
* containing the rest of arguments used to call list_iterate(). The
* calling fuction should be declared: int func(type *, va_list). The
* return results are all added together and the sum is returned from
* list_iterate().
*/
int
list_iterate(void **list, int (*vfunc)(void *, va_list), ...)
{
int current = 0, rc = 0;
#ifdef DEBUG
syslog(LOG_DEBUG, "list_iterate(0x%x, 0x%x)", list, vfunc);
#endif
if (list != NULL)
while (list[current] != NULL) {
va_list ap;
va_start(ap, (vfunc));
rc += (vfunc)(list[current++], ap);
va_end(ap);
}
return (rc);
}
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