Zend Library

1 files changed, 189 insertions, 0 deletions

diff --git a/Zend/zend_llist.c b/Zend/zend_llist.c
new file mode 100644
index 0000000000..ec19038dd0
--- /dev/null
+++ b/Zend/zend_llist.c
@@ -0,0 +1,189 @@
+/*
+   +----------------------------------------------------------------------+
+   | Zend Engine                                                          |
+   +----------------------------------------------------------------------+
+   | Copyright (c) 1998, 1999 Andi Gutmans, Zeev Suraski                  |
+   +----------------------------------------------------------------------+
+   | This source file is subject to the Zend license, that is bundled     |
+   | with this package in the file LICENSE.  If you did not receive a     |
+   | copy of the Zend license, please mail us at zend@zend.com so we can  |
+   | send you a copy immediately.                                         |
+   +----------------------------------------------------------------------+
+   | Authors: Andi Gutmans <andi@zend.com>                                |
+   |          Zeev Suraski <zeev@zend.com>                                |
+   +----------------------------------------------------------------------+
+*/
+
+#include "zend.h"
+#include "zend_llist.h"
+
+ZEND_API void zend_llist_init(zend_llist *l, size_t size, void (*dtor)(void *data), unsigned char persistent)
+{
+	l->head = NULL;
+	l->tail = NULL;
+	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);
+}
+
+
+ZEND_API void zend_llist_del_element(zend_llist *l, void *element)
+{
+	zend_llist_element *current=l->head;
+
+	while (current) {
+		if (current->data == element) {
+			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);
+				efree(current);
+			}
+			break;
+		}
+		current = 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;
+	}
+}
+
+ZEND_API void zend_llist_remove_tail(zend_llist *l)
+{
+	zend_llist_element *old_tail;
+
+	if ((old_tail = l->tail)) {
+		if (l->tail->prev) {
+			l->tail->prev->next = NULL;
+		}
+		l->tail = l->tail->prev;
+		efree(old_tail);
+	}
+}
+
+
+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(zend_llist *l, void (*func)(void *data))
+{
+	zend_llist_element *element;
+
+	for (element=l->head; element; element=element->next) {
+		func(element->data);
+	}
+}
+
+
+ZEND_API void zend_llist_apply_with_argument(zend_llist *l, void (*func)(void *data, void *arg), void *arg)
+{
+	zend_llist_element *element;
+
+	for (element=l->head; element; element=element->next) {
+		func(element->data, arg);
+	}
+}
+
+
+ZEND_API int zend_llist_count(zend_llist *l)
+{
+	zend_llist_element *element;
+	int element_count=0;
+
+	for (element=l->head; element; element=element->next) {
+		element_count++;
+	}
+	return element_count;
+}
+
+
+ZEND_API void *zend_llist_get_first(zend_llist *l)
+{
+	l->traverse_ptr = l->head;
+	if (l->traverse_ptr) {
+		return l->traverse_ptr->data;
+	} else {
+		return NULL;
+	}
+}
+
+
+ZEND_API void *zend_llist_get_last(zend_llist *l)
+{
+	l->traverse_ptr = l->tail;
+	if (l->traverse_ptr) {
+		return l->traverse_ptr->data;
+	} else {
+		return NULL;
+	}
+}
+
+
+ZEND_API void *zend_llist_get_next(zend_llist *l)
+{
+	if (l->traverse_ptr) {
+		l->traverse_ptr = l->traverse_ptr->next;
+		if (l->traverse_ptr) {
+			return l->traverse_ptr->data;
+		}
+	}
+	return NULL;
+}
+
+
+ZEND_API void *zend_llist_get_prev(zend_llist *l)
+{
+	if (l->traverse_ptr) {
+		l->traverse_ptr = l->traverse_ptr->prev;
+		if (l->traverse_ptr) {
+			return l->traverse_ptr->data;
+		}
+	}
+	return NULL;
+}