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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2011 Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.zend.com/license/2_00.txt. |
| If you did not receive a copy of the Zend license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@zend.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@zend.com> |
| Zeev Suraski <zeev@zend.com> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "zend.h"
#include "zend_llist.h"
#include "zend_qsort.h"
ZEND_API void zend_llist_init(zend_llist *l, size_t size, llist_dtor_func_t dtor, unsigned char persistent)
{
l->head = NULL;
l->tail = NULL;
l->count = 0;
l->size = size;
l->dtor = dtor;
l->persistent = persistent;
}
ZEND_API void zend_llist_add_element(zend_llist *l, void *element)
{
zend_llist_element *tmp = pemalloc(sizeof(zend_llist_element)+l->size-1, l->persistent);
tmp->prev = l->tail;
tmp->next = NULL;
if (l->tail) {
l->tail->next = tmp;
} else {
l->head = tmp;
}
l->tail = tmp;
memcpy(tmp->data, element, l->size);
++l->count;
}
ZEND_API void zend_llist_prepend_element(zend_llist *l, void *element)
{
zend_llist_element *tmp = pemalloc(sizeof(zend_llist_element)+l->size-1, l->persistent);
tmp->next = l->head;
tmp->prev = NULL;
if (l->head) {
l->head->prev = tmp;
} else {
l->tail = tmp;
}
l->head = tmp;
memcpy(tmp->data, element, l->size);
++l->count;
}
#define DEL_LLIST_ELEMENT(current, l) \
if ((current)->prev) {\
(current)->prev->next = (current)->next;\
} else {\
(l)->head = (current)->next;\
}\
if ((current)->next) {\
(current)->next->prev = (current)->prev;\
} else {\
(l)->tail = (current)->prev;\
}\
if ((l)->dtor) {\
(l)->dtor((current)->data);\
}\
pefree((current), (l)->persistent);\
--l->count;
ZEND_API void zend_llist_del_element(zend_llist *l, void *element, int (*compare)(void *element1, void *element2))
{
zend_llist_element *current=l->head;
zend_llist_element *next;
while (current) {
next = current->next;
if (compare(current->data, element)) {
DEL_LLIST_ELEMENT(current, l);
break;
}
current = next;
}
}
ZEND_API void zend_llist_destroy(zend_llist *l)
{
zend_llist_element *current=l->head, *next;
while (current) {
next = current->next;
if (l->dtor) {
l->dtor(current->data);
}
pefree(current, l->persistent);
current = next;
}
l->count = 0;
}
ZEND_API void zend_llist_clean(zend_llist *l)
{
zend_llist_destroy(l);
l->head = l->tail = NULL;
}
ZEND_API void *zend_llist_remove_tail(zend_llist *l)
{
zend_llist_element *old_tail;
void *data;
if ((old_tail = l->tail)) {
if (old_tail->prev) {
old_tail->prev->next = NULL;
} else {
l->head = NULL;
}
data = old_tail->data;
l->tail = old_tail->prev;
if (l->dtor) {
l->dtor(data);
}
pefree(old_tail, l->persistent);
--l->count;
return data;
}
return NULL;
}
ZEND_API void zend_llist_copy(zend_llist *dst, zend_llist *src)
{
zend_llist_element *ptr;
zend_llist_init(dst, src->size, src->dtor, src->persistent);
ptr = src->head;
while (ptr) {
zend_llist_add_element(dst, ptr->data);
ptr = ptr->next;
}
}
ZEND_API void zend_llist_apply_with_del(zend_llist *l, int (*func)(void *data))
{
zend_llist_element *element, *next;
element=l->head;
while (element) {
next = element->next;
if (func(element->data)) {
DEL_LLIST_ELEMENT(element, l);
}
element = next;
}
}
ZEND_API void zend_llist_apply(zend_llist *l, llist_apply_func_t func TSRMLS_DC)
{
zend_llist_element *element;
for (element=l->head; element; element=element->next) {
func(element->data TSRMLS_CC);
}
}
ZEND_API void zend_llist_sort(zend_llist *l, llist_compare_func_t comp_func TSRMLS_DC)
{
size_t i;
zend_llist_element **elements;
zend_llist_element *element, **ptr;
if (l->count <= 0) {
return;
}
elements = (zend_llist_element **) emalloc(l->count * sizeof(zend_llist_element *));
ptr = &elements[0];
for (element=l->head; element; element=element->next) {
*ptr++ = element;
}
zend_qsort(elements, l->count, sizeof(zend_llist_element *), (compare_func_t) comp_func TSRMLS_CC);
l->head = elements[0];
elements[0]->prev = NULL;
for (i = 1; i < l->count; i++) {
elements[i]->prev = elements[i-1];
elements[i-1]->next = elements[i];
}
elements[i-1]->next = NULL;
l->tail = elements[i-1];
efree(elements);
}
ZEND_API void zend_llist_apply_with_argument(zend_llist *l, llist_apply_with_arg_func_t func, void *arg TSRMLS_DC)
{
zend_llist_element *element;
for (element=l->head; element; element=element->next) {
func(element->data, arg TSRMLS_CC);
}
}
ZEND_API void zend_llist_apply_with_arguments(zend_llist *l, llist_apply_with_args_func_t func TSRMLS_DC, int num_args, ...)
{
zend_llist_element *element;
va_list args;
va_start(args, num_args);
for (element=l->head; element; element=element->next) {
func(element->data, num_args, args TSRMLS_CC);
}
va_end(args);
}
ZEND_API int zend_llist_count(zend_llist *l)
{
return l->count;
}
ZEND_API void *zend_llist_get_first_ex(zend_llist *l, zend_llist_position *pos)
{
zend_llist_position *current = pos ? pos : &l->traverse_ptr;
*current = l->head;
if (*current) {
return (*current)->data;
} else {
return NULL;
}
}
ZEND_API void *zend_llist_get_last_ex(zend_llist *l, zend_llist_position *pos)
{
zend_llist_position *current = pos ? pos : &l->traverse_ptr;
*current = l->tail;
if (*current) {
return (*current)->data;
} else {
return NULL;
}
}
ZEND_API void *zend_llist_get_next_ex(zend_llist *l, zend_llist_position *pos)
{
zend_llist_position *current = pos ? pos : &l->traverse_ptr;
if (*current) {
*current = (*current)->next;
if (*current) {
return (*current)->data;
}
}
return NULL;
}
ZEND_API void *zend_llist_get_prev_ex(zend_llist *l, zend_llist_position *pos)
{
zend_llist_position *current = pos ? pos : &l->traverse_ptr;
if (*current) {
*current = (*current)->prev;
if (*current) {
return (*current)->data;
}
}
return NULL;
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/
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