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php-src/ext/spl/spl_dllist.c

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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2008 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP 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.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Etienne Kneuss <colder@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "php.h"
#include "zend_exceptions.h"
#include "zend_hash.h"
#include "php_spl.h"
#include "spl_functions.h"
#include "spl_engine.h"
#include "spl_iterators.h"
#include "spl_array.h"
#include "spl_dllist.h"
#include "spl_exceptions.h"
zend_object_handlers spl_handler_SplDoublyLinkedList;
PHPAPI zend_class_entry *spl_ce_SplDoublyLinkedList;
PHPAPI zend_class_entry *spl_ce_SplQueue;
PHPAPI zend_class_entry *spl_ce_SplStack;
#define SPL_LLIST_DELREF(elem) if(!--(elem)->rc) { \
efree(elem); \
elem = NULL; \
}
#define SPL_LLIST_CHECK_DELREF(elem) if((elem) && !--(elem)->rc) { \
efree(elem); \
elem = NULL; \
}
#define SPL_LLIST_ADDREF(elem) (elem)->rc++
#define SPL_LLIST_CHECK_ADDREF(elem) if(elem) (elem)->rc++
#define SPL_DLLIST_IT_DELETE 0x00000001 /* Delete flag makes the iterator delete the current element on next */
#define SPL_DLLIST_IT_LIFO 0x00000002 /* LIFO flag makes the iterator traverse the structure as a LastInFirstOut */
#define SPL_DLLIST_IT_MASK 0x00000003 /* Mask to isolate flags related to iterators */
#define SPL_DLLIST_IT_FIX 0x00000004 /* Backward/Forward bit is fixed */
#ifdef accept
#undef accept
#endif
typedef struct _spl_ptr_llist_element {
struct _spl_ptr_llist_element *prev;
struct _spl_ptr_llist_element *next;
int rc;
void *data;
} spl_ptr_llist_element;
typedef void (*spl_ptr_llist_dtor_func)(spl_ptr_llist_element *);
typedef void (*spl_ptr_llist_ctor_func)(spl_ptr_llist_element *);
typedef struct _spl_ptr_llist {
spl_ptr_llist_element *head;
spl_ptr_llist_element *tail;
spl_ptr_llist_dtor_func dtor;
spl_ptr_llist_ctor_func ctor;
int count;
} spl_ptr_llist;
typedef struct _spl_dllist_object spl_dllist_object;
typedef struct _spl_dllist_it spl_dllist_it;
struct _spl_dllist_object {
zend_object std;
spl_ptr_llist *llist;
int traverse_position;
spl_ptr_llist_element *traverse_pointer;
zval *retval;
int flags;
zend_function *fptr_offset_get;
zend_function *fptr_offset_set;
zend_function *fptr_offset_has;
zend_function *fptr_offset_del;
zend_class_entry *ce_get_iterator;
};
/* define an overloaded iterator structure */
struct _spl_dllist_it {
zend_user_iterator intern;
int traverse_position;
spl_ptr_llist_element *traverse_pointer;
int flags;
spl_dllist_object *object;
};
/* {{{ spl_ptr_llist */
static void spl_ptr_llist_zval_dtor(spl_ptr_llist_element *elem) { /* {{{ */
if (elem->data) {
zval_ptr_dtor((zval **)&elem->data);
}
}
/* }}} */
static void spl_ptr_llist_zval_ctor(spl_ptr_llist_element *elem) { /* {{{ */
Z_ADDREF_P((zval *)elem->data);
}
/* }}} */
static spl_ptr_llist *spl_ptr_llist_init(spl_ptr_llist_ctor_func ctor, spl_ptr_llist_dtor_func dtor) /* {{{ */
{
spl_ptr_llist *llist = emalloc(sizeof(spl_ptr_llist));
llist->head = NULL;
llist->tail = NULL;
llist->count = 0;
llist->dtor = dtor;
llist->ctor = ctor;
return llist;
}
/* }}} */
static long spl_ptr_llist_count(spl_ptr_llist *llist) /* {{{ */
{
return (long)llist->count;
}
/* }}} */
static void spl_ptr_llist_destroy(spl_ptr_llist *llist) /* {{{ */
{
spl_ptr_llist_element *current = llist->head, *next;
spl_ptr_llist_dtor_func dtor = llist->dtor;
while (current) {
next = current->next;
if(current && dtor) {
dtor(current);
}
SPL_LLIST_DELREF(current);
current = next;
}
efree(llist);
}
/* }}} */
static spl_ptr_llist_element *spl_ptr_llist_offset(spl_ptr_llist *llist, long offset, int backward) /* {{{ */
{
spl_ptr_llist_element *current;
int pos = 0;
if (backward) {
current = llist->tail;
} else {
current = llist->head;
}
while (current && pos < offset) {
pos++;
if (backward) {
current = current->prev;
} else {
current = current->next;
}
}
return current;
}
/* }}} */
static void spl_ptr_llist_unshift(spl_ptr_llist *llist, void *data) /* {{{ */
{
spl_ptr_llist_element *elem = emalloc(sizeof(spl_ptr_llist_element));
elem->data = data;
elem->rc = 1;
elem->prev = NULL;
elem->next = llist->head;
if (llist->head) {
llist->head->prev = elem;
} else {
llist->tail = elem;
}
llist->head = elem;
llist->count++;
if (llist->ctor) {
llist->ctor(elem);
}
}
/* }}} */
static void spl_ptr_llist_push(spl_ptr_llist *llist, void *data) /* {{{ */
{
spl_ptr_llist_element *elem = emalloc(sizeof(spl_ptr_llist_element));
elem->data = data;
elem->rc = 1;
elem->prev = llist->tail;
elem->next = NULL;
if (llist->tail) {
llist->tail->next = elem;
} else {
llist->head = elem;
}
llist->tail = elem;
llist->count++;
if (llist->ctor) {
llist->ctor(elem);
}
}
/* }}} */
static void *spl_ptr_llist_pop(spl_ptr_llist *llist) /* {{{ */
{
void *data;
spl_ptr_llist_element *tail = llist->tail;
if (tail == NULL) {
return NULL;
}
if (tail->prev) {
tail->prev->next = NULL;
} else {
llist->head = NULL;
}
llist->tail = tail->prev;
llist->count--;
data = tail->data;
if (llist->dtor) {
llist->dtor(tail);
}
tail->data = NULL;
SPL_LLIST_DELREF(tail);
return data;
}
/* }}} */
static void *spl_ptr_llist_last(spl_ptr_llist *llist) /* {{{ */
{
spl_ptr_llist_element *tail = llist->tail;
if (tail == NULL) {
return NULL;
} else {
return tail->data;
}
}
/* }}} */
static void *spl_ptr_llist_first(spl_ptr_llist *llist) /* {{{ */
{
spl_ptr_llist_element *head = llist->head;
if (head == NULL) {
return NULL;
} else {
return head->data;
}
}
/* }}} */
static void *spl_ptr_llist_shift(spl_ptr_llist *llist) /* {{{ */
{
void *data;
spl_ptr_llist_element *head = llist->head;
if (head == NULL) {
return NULL;
}
if (head->next) {
head->next->prev = NULL;
} else {
llist->tail = NULL;
}
llist->head = head->next;
llist->count--;
data = head->data;
if (llist->dtor) {
llist->dtor(head);
}
head->data = NULL;
SPL_LLIST_DELREF(head);
return data;
}
/* }}} */
static void spl_dllist_object_free_storage(void *object TSRMLS_DC) /* {{{ */
{
spl_dllist_object *intern = (spl_dllist_object *)object;
zval *tmp = NULL;
zend_object_std_dtor(&intern->std TSRMLS_CC);
while(intern->llist->count > 0) {
tmp = (zval *)spl_ptr_llist_pop(intern->llist);
zval_ptr_dtor(&tmp);
}
spl_ptr_llist_destroy(intern->llist);
zval_ptr_dtor(&intern->retval);
efree(object);
}
/* }}} */
static void spl_ptr_llist_copy(spl_ptr_llist *from, spl_ptr_llist *to) /* {{{ */
{
spl_ptr_llist_element *current = from->head, *next;
spl_ptr_llist_ctor_func ctor = from->ctor;
while (current) {
next = current->next;
if (ctor) {
ctor(current);
}
spl_ptr_llist_push(to, current->data);
current = next;
}
}
/* }}} */
/* }}} */
zend_object_iterator *spl_dllist_get_iterator(zend_class_entry *ce, zval *object, int by_ref TSRMLS_DC);
static zend_object_value spl_dllist_object_new_ex(zend_class_entry *class_type, spl_dllist_object **obj, zval *orig, int clone_orig TSRMLS_DC) /* {{{ */
{
zend_object_value retval;
spl_dllist_object *intern;
zval *tmp;
zend_class_entry *parent = class_type;
int inherited = 0;
intern = ecalloc(1, sizeof(spl_dllist_object));
*obj = intern;
ALLOC_INIT_ZVAL(intern->retval);
zend_object_std_init(&intern->std, class_type TSRMLS_CC);
zend_hash_copy(intern->std.properties, &class_type->default_properties, (copy_ctor_func_t) zval_add_ref, (void *) &tmp, sizeof(zval *));
intern->flags = 0;
intern->traverse_position = 0;
if (orig) {
spl_dllist_object *other = (spl_dllist_object*)zend_object_store_get_object(orig TSRMLS_CC);
intern->ce_get_iterator = other->ce_get_iterator;
if (clone_orig) {
intern->llist = (spl_ptr_llist *)spl_ptr_llist_init(other->llist->ctor, other->llist->dtor);
spl_ptr_llist_copy(other->llist, intern->llist);
intern->traverse_pointer = intern->llist->head;
} else {
intern->llist = other->llist;
intern->traverse_pointer = intern->llist->head;
SPL_LLIST_CHECK_ADDREF(intern->traverse_pointer);
}
intern->flags = other->flags;
} else {
intern->llist = (spl_ptr_llist *)spl_ptr_llist_init(spl_ptr_llist_zval_ctor, spl_ptr_llist_zval_dtor);
intern->traverse_pointer = intern->llist->head;
SPL_LLIST_CHECK_ADDREF(intern->traverse_pointer);
}
while (parent) {
if (parent == spl_ce_SplStack) {
intern->flags |= (SPL_DLLIST_IT_FIX | SPL_DLLIST_IT_LIFO);
} else if (parent == spl_ce_SplQueue) {
intern->flags |= SPL_DLLIST_IT_FIX;
}
if (parent == spl_ce_SplDoublyLinkedList) {
retval.handlers = &spl_handler_SplDoublyLinkedList;
break;
}
parent = parent->parent;
inherited = 1;
}
retval.handle = zend_objects_store_put(intern, (zend_objects_store_dtor_t)zend_objects_destroy_object, spl_dllist_object_free_storage, NULL TSRMLS_CC);
if (!parent) { /* this must never happen */
php_error_docref(NULL TSRMLS_CC, E_COMPILE_ERROR, "Internal compiler error, Class is not child of SplDoublyLinkedList");
}
if (inherited) {
zend_hash_find(&class_type->function_table, "offsetget", sizeof("offsetget"), (void **) &intern->fptr_offset_get);
if (intern->fptr_offset_get->common.scope == parent) {
intern->fptr_offset_get = NULL;
}
zend_hash_find(&class_type->function_table, "offsetset", sizeof("offsetset"), (void **) &intern->fptr_offset_set);
if (intern->fptr_offset_set->common.scope == parent) {
intern->fptr_offset_set = NULL;
}
zend_hash_find(&class_type->function_table, "offsetexists", sizeof("offsetexists"), (void **) &intern->fptr_offset_has);
if (intern->fptr_offset_has->common.scope == parent) {
intern->fptr_offset_has = NULL;
}
zend_hash_find(&class_type->function_table, "offsetunset", sizeof("offsetunset"), (void **) &intern->fptr_offset_del);
if (intern->fptr_offset_del->common.scope == parent) {
intern->fptr_offset_del = NULL;
}
}
return retval;
}
/* }}} */
static zend_object_value spl_dllist_object_new(zend_class_entry *class_type TSRMLS_DC) /* {{{ */
{
spl_dllist_object *tmp;
return spl_dllist_object_new_ex(class_type, &tmp, NULL, 0 TSRMLS_CC);
}
/* }}} */
static zend_object_value spl_dllist_object_clone(zval *zobject TSRMLS_DC) /* {{{ */
{
zend_object_value new_obj_val;
zend_object *old_object;
zend_object *new_object;
zend_object_handle handle = Z_OBJ_HANDLE_P(zobject);
spl_dllist_object *intern;
old_object = zend_objects_get_address(zobject TSRMLS_CC);
new_obj_val = spl_dllist_object_new_ex(old_object->ce, &intern, zobject, 1 TSRMLS_CC);
new_object = &intern->std;
zend_objects_clone_members(new_object, new_obj_val, old_object, handle TSRMLS_CC);
return new_obj_val;
}
/* }}} */
static int spl_dllist_object_count_elements(zval *object, long *count TSRMLS_DC) /* {{{ */
{
spl_dllist_object *intern = (spl_dllist_object*)zend_object_store_get_object(object TSRMLS_CC);
*count = spl_ptr_llist_count(intern->llist);
return SUCCESS;
}
/* }}} */
/* {{{ proto bool SplDoublyLinkedList::push(mixed $value) U
Push $value on the SplDoublyLinkedList */
SPL_METHOD(SplDoublyLinkedList, push)
{
zval *value;
spl_dllist_object *intern;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &value) == FAILURE) {
return;
}
SEPARATE_ARG_IF_REF(value);
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
spl_ptr_llist_push(intern->llist, value);
RETURN_TRUE;
}
/* }}} */
/* {{{ proto bool SplDoublyLinkedList::unshift(mixed $value) U
Unshift $value on the SplDoublyLinkedList */
SPL_METHOD(SplDoublyLinkedList, unshift)
{
zval *value;
spl_dllist_object *intern;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &value) == FAILURE) {
return;
}
SEPARATE_ARG_IF_REF(value);
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
spl_ptr_llist_unshift(intern->llist, value);
RETURN_TRUE;
}
/* }}} */
/* {{{ proto mixed SplDoublyLinkedList::pop() U
Pop an element out of the SplDoublyLinkedList */
SPL_METHOD(SplDoublyLinkedList, pop)
{
zval *value;
spl_dllist_object *intern;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "") == FAILURE) {
return;
}
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
value = (zval *)spl_ptr_llist_pop(intern->llist);
if (value == NULL) {
zend_throw_exception(spl_ce_RuntimeException, "Can't pop from an empty datastructure", 0 TSRMLS_CC);
return;
}
RETURN_ZVAL(value, 1, 1);
}
/* }}} */
/* {{{ proto mixed SplDoublyLinkedList::shift() U
Shift an element out of the SplDoublyLinkedList */
SPL_METHOD(SplDoublyLinkedList, shift)
{
zval *value;
spl_dllist_object *intern;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "") == FAILURE) {
return;
}
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
value = (zval *)spl_ptr_llist_shift(intern->llist);
if (value == NULL) {
zend_throw_exception(spl_ce_RuntimeException, "Can't shift from an empty datastructure", 0 TSRMLS_CC);
return;
}
RETURN_ZVAL(value, 1, 1);
}
/* }}} */
/* {{{ proto mixed SplDoublyLinkedList::top() U
Peek at the top element of the SplDoublyLinkedList */
SPL_METHOD(SplDoublyLinkedList, top)
{
zval *value;
spl_dllist_object *intern;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "") == FAILURE) {
return;
}
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
value = (zval *)spl_ptr_llist_last(intern->llist);
if (value == NULL) {
zend_throw_exception(spl_ce_RuntimeException, "Can't peek at an empty datastructure", 0 TSRMLS_CC);
return;
}
RETURN_ZVAL(value, 1, 0);
}
/* }}} */
/* {{{ proto mixed SplDoublyLinkedList::bottom() U
Peek at the bottom element of the SplDoublyLinkedList */
SPL_METHOD(SplDoublyLinkedList, bottom)
{
zval *value;
spl_dllist_object *intern;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "") == FAILURE) {
return;
}
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
value = (zval *)spl_ptr_llist_first(intern->llist);
if (value == NULL) {
zend_throw_exception(spl_ce_RuntimeException, "Can't peek at an empty datastructure", 0 TSRMLS_CC);
return;
}
RETURN_ZVAL(value, 1, 0);
}
/* }}} */
/* {{{ proto int SplDoublyLinkedList::count() U
Return the number of elements in the datastructure. */
SPL_METHOD(SplDoublyLinkedList, count)
{
long count;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "") == FAILURE) {
return;
}
spl_dllist_object_count_elements(getThis(), &count TSRMLS_CC);
RETURN_LONG(count);
}
/* }}} */
/* {{{ proto int SplDoublyLinkedList::isEmpty() U
Return true if the SplDoublyLinkedList is empty. */
SPL_METHOD(SplDoublyLinkedList, isEmpty)
{
long count;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "") == FAILURE) {
return;
}
spl_dllist_object_count_elements(getThis(), &count TSRMLS_CC);
RETURN_BOOL(count==0);
}
/* }}} */
/* {{{ proto int SplDoublyLinkedList::setIteratorMode($flags) U
Set the mode of iteration */
SPL_METHOD(SplDoublyLinkedList, setIteratorMode)
{
long value;
spl_dllist_object *intern;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &value) == FAILURE) {
return;
}
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
if (intern->flags & SPL_DLLIST_IT_FIX
&& (intern->flags & SPL_DLLIST_IT_LIFO) != (value & SPL_DLLIST_IT_LIFO)) {
zend_throw_exception(spl_ce_RuntimeException, "Iterators' LIFO/FIFO modes for SplStack/SplQueue objects are frozen", 0 TSRMLS_CC);
return;
}
intern->flags = value & SPL_DLLIST_IT_MASK;
RETURN_LONG(intern->flags);
}
/* }}} */
/* {{{ proto int SplDoublyLinkedList::getIteratorMode() U
Return the mode of iteration */
SPL_METHOD(SplDoublyLinkedList, getIteratorMode)
{
spl_dllist_object *intern;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "") == FAILURE) {
return;
}
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
RETURN_LONG(intern->flags);
}
/* }}} */
static long spl_dllist_offset_convert(zval *offset TSRMLS_DC) /* {{{ */
{
switch(Z_TYPE_P(offset)) {
case IS_STRING:
ZEND_HANDLE_NUMERIC(Z_STRVAL_P(offset), Z_STRLEN_P(offset)+1, idx);
break;
case IS_DOUBLE:
case IS_RESOURCE:
case IS_BOOL:
case IS_LONG:
if (Z_TYPE_P(offset) == IS_DOUBLE) {
return (long)Z_DVAL_P(offset);
} else {
return Z_LVAL_P(offset);
}
}
return -1;
}
/* }}} */
/* {{{ proto bool SplDoublyLinkedList::offsetExists(mixed $index) U
Returns whether the requested $index exists. */
SPL_METHOD(SplDoublyLinkedList, offsetExists)
{
zval *zindex;
spl_dllist_object *intern;
long index;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &zindex) == FAILURE) {
return;
}
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
index = spl_dllist_offset_convert(zindex TSRMLS_CC);
RETURN_BOOL(index >= 0 && index < intern->llist->count);
} /* }}} */
/* {{{ proto mixed SplDoublyLinkedList::offsetGet(mixed $index) U
Returns the value at the specified $index. */
SPL_METHOD(SplDoublyLinkedList, offsetGet)
{
zval *zindex, *value;
long index;
spl_dllist_object *intern;
spl_ptr_llist_element *element;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &zindex) == FAILURE) {
return;
}
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
index = spl_dllist_offset_convert(zindex TSRMLS_CC);
if (index < 0 || index >= intern->llist->count) {
zend_throw_exception(spl_ce_OutOfRangeException, "Offset invalid or out of range", 0 TSRMLS_CC);
return;
}
element = spl_ptr_llist_offset(intern->llist, index, intern->flags & SPL_DLLIST_IT_LIFO);
if (element != NULL) {
value = (zval *)element->data;
RETURN_ZVAL(value, 1, 0);
} else {
zend_throw_exception(spl_ce_OutOfRangeException, "Offset invalid", 0 TSRMLS_CC);
return;
}
} /* }}} */
/* {{{ proto void SplDoublyLinkedList::offsetSet(mixed $index, mixed $newval) U
Sets the value at the specified $index to $newval. */
SPL_METHOD(SplDoublyLinkedList, offsetSet)
{
zval *zindex, *value;
spl_dllist_object *intern;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "zz", &zindex, &value) == FAILURE) {
return;
}
SEPARATE_ARG_IF_REF(value);
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
if (Z_TYPE_P(zindex) == IS_NULL) {
/* $obj[] = ... */
spl_ptr_llist_push(intern->llist, value);
} else {
/* $obj[$foo] = ... */
long index;
spl_ptr_llist_element *element;
index = spl_dllist_offset_convert(zindex TSRMLS_CC);
if (index < 0 || index >= intern->llist->count) {
zend_throw_exception(spl_ce_OutOfRangeException, "Offset invalid or out of range", 0 TSRMLS_CC);
return;
}
element = spl_ptr_llist_offset(intern->llist, index, intern->flags & SPL_DLLIST_IT_LIFO);
if (element != NULL) {
/* call dtor on the old element as in spl_ptr_llist_pop */
if (intern->llist->dtor) {
intern->llist->dtor(element);
}
/* the element is replaced, delref the old one as in
* SplDoublyLinkedList::pop() */
zval_ptr_dtor((zval **)&element->data);
element->data = value;
/* new element, call ctor as in spl_ptr_llist_push */
if (intern->llist->ctor) {
intern->llist->ctor(element);
}
} else {
zend_throw_exception(spl_ce_OutOfRangeException, "Offset invalid", 0 TSRMLS_CC);
return;
}
}
} /* }}} */
/* {{{ proto void SplDoublyLinkedList::offsetUnset(mixed $index) U
Unsets the value at the specified $index. */
SPL_METHOD(SplDoublyLinkedList, offsetUnset)
{
zval *zindex;
long index;
spl_dllist_object *intern;
spl_ptr_llist_element *element;
spl_ptr_llist *llist;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &zindex) == FAILURE) {
return;
}
intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
index = (int)spl_dllist_offset_convert(zindex TSRMLS_CC);
llist = intern->llist;
if (index < 0 || index >= intern->llist->count) {
zend_throw_exception(spl_ce_OutOfRangeException, "Offset out of range", 0 TSRMLS_CC);
return;
}
element = spl_ptr_llist_offset(intern->llist, index, intern->flags & SPL_DLLIST_IT_LIFO);
if (element != NULL) {
/* connect the neightbors */
if (element->prev) {
element->prev->next = element->next;
}
if (element->next) {
element->next->prev = element->prev;
}
/* take care of head/tail */
if (element == llist->head) {
llist->head = element->next;
}
if (element == llist->tail) {
llist->tail = element->prev;
}
/* finally, delete the element */
llist->count--;
if(llist->dtor) {
llist->dtor(element);
}
zval_ptr_dtor((zval **)&element->data);
element->data = NULL;
SPL_LLIST_DELREF(element);
} else {
zend_throw_exception(spl_ce_OutOfRangeException, "Offset invalid", 0 TSRMLS_CC);
return;
}
} /* }}} */
static void spl_dllist_it_dtor(zend_object_iterator *iter TSRMLS_DC) /* {{{ */
{
spl_dllist_it *iterator = (spl_dllist_it *)iter;
SPL_LLIST_CHECK_DELREF(iterator->traverse_pointer);
zend_user_it_invalidate_current(iter TSRMLS_CC);
zval_ptr_dtor((zval**)&iterator->intern.it.data);
efree(iterator);
}
/* }}} */
static void spl_dllist_it_helper_rewind(spl_ptr_llist_element **traverse_pointer_ptr, int *traverse_position_ptr, spl_ptr_llist *llist, int flags TSRMLS_DC) /* {{{ */
{
SPL_LLIST_CHECK_DELREF(*traverse_pointer_ptr);
if (flags & SPL_DLLIST_IT_LIFO) {
*traverse_position_ptr = llist->count-1;
*traverse_pointer_ptr = llist->tail;
} else {
*traverse_position_ptr = 0;
*traverse_pointer_ptr = llist->head;
}
SPL_LLIST_CHECK_ADDREF(*traverse_pointer_ptr);
}
/* }}} */
static void spl_dllist_it_helper_move_forward(spl_ptr_llist_element **traverse_pointer_ptr, int *traverse_position_ptr, spl_ptr_llist *llist, int flags TSRMLS_DC) /* {{{ */
{
if (*traverse_pointer_ptr) {
spl_ptr_llist_element *old = *traverse_pointer_ptr;
if (flags & SPL_DLLIST_IT_LIFO) {
*traverse_pointer_ptr = old->prev;
(*traverse_position_ptr)--;
if (flags & SPL_DLLIST_IT_DELETE) {
zval *prev = (zval *)spl_ptr_llist_pop(llist);
if (prev) {
zval_ptr_dtor((zval **)&prev);
}
}
} else {
*traverse_pointer_ptr = old->next;
(*traverse_position_ptr)++;
if (flags & SPL_DLLIST_IT_DELETE) {
zval *prev = (zval *)spl_ptr_llist_shift(llist);
if (prev) {
zval_ptr_dtor((zval **)&prev);
}
}
}
SPL_LLIST_DELREF(old);
SPL_LLIST_CHECK_ADDREF(*traverse_pointer_ptr);
}
}
/* }}} */
static void spl_dllist_it_rewind(zend_object_iterator *iter TSRMLS_DC) /* {{{ */
{
spl_dllist_it *iterator = (spl_dllist_it *)iter;
spl_dllist_object *object = iterator->object;
spl_ptr_llist *llist = object->llist;
spl_dllist_it_helper_rewind(&iterator->traverse_pointer, &iterator->traverse_position, llist, object->flags TSRMLS_CC);
}
/* }}} */
static int spl_dllist_it_valid(zend_object_iterator *iter TSRMLS_DC) /* {{{ */
{
spl_dllist_it *iterator = (spl_dllist_it *)iter;
spl_ptr_llist_element *element = iterator->traverse_pointer;
return (element != NULL ? SUCCESS : FAILURE);
}
/* }}} */
static void spl_dllist_it_get_current_data(zend_object_iterator *iter, zval ***data TSRMLS_DC) /* {{{ */
{
spl_dllist_it *iterator = (spl_dllist_it *)iter;
spl_ptr_llist_element *element = iterator->traverse_pointer;
if (element == NULL || element->data == NULL) {
*data = NULL;
} else {
*data = (zval **)&element->data;
}
}
/* }}} */
static int spl_dllist_it_get_current_key(zend_object_iterator *iter, char **str_key, uint *str_key_len, ulong *int_key TSRMLS_DC) /* {{{ */
{
spl_dllist_it *iterator = (spl_dllist_it *)iter;
*int_key = (ulong) iterator->traverse_position;
return HASH_KEY_IS_LONG;
}
/* }}} */
static void spl_dllist_it_move_forward(zend_object_iterator *iter TSRMLS_DC) /* {{{ */
{
spl_dllist_it *iterator = (spl_dllist_it *)iter;
spl_dllist_object *object = iterator->object;
zend_user_it_invalidate_current(iter TSRMLS_CC);
spl_dllist_it_helper_move_forward(&iterator->traverse_pointer, &iterator->traverse_position, object->llist, object->flags TSRMLS_CC);
}
/* }}} */
/* {{{ proto int SplDoublyLinkedList::key() U
Return current array key */
SPL_METHOD(SplDoublyLinkedList, key)
{
spl_dllist_object *intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
RETURN_LONG(intern->traverse_position);
}
/* }}} */
/* {{{ proto void SplDoublyLinkedList::next() U
Move to next entry */
SPL_METHOD(SplDoublyLinkedList, next)
{
spl_dllist_object *intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
spl_dllist_it_helper_move_forward(&intern->traverse_pointer, &intern->traverse_position, intern->llist, intern->flags TSRMLS_CC);
}
/* }}} */
/* {{{ proto bool SplDoublyLinkedList::valid() U
Check whether the datastructure contains more entries */
SPL_METHOD(SplDoublyLinkedList, valid)
{
spl_dllist_object *intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
RETURN_BOOL(intern->traverse_pointer != NULL);
}
/* }}} */
/* {{{ proto void SplDoublyLinkedList::rewind() U
Rewind the datastructure back to the start */
SPL_METHOD(SplDoublyLinkedList, rewind)
{
spl_dllist_object *intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
spl_dllist_it_helper_rewind(&intern->traverse_pointer, &intern->traverse_position, intern->llist, intern->flags TSRMLS_CC);
}
/* }}} */
/* {{{ proto mixed|NULL SplDoublyLinkedList::current() U
Return current datastructure entry */
SPL_METHOD(SplDoublyLinkedList, current)
{
spl_dllist_object *intern = (spl_dllist_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
spl_ptr_llist_element *element = intern->traverse_pointer;
if (element == NULL || element->data == NULL) {
RETURN_NULL();
} else {
zval *data = (zval *)element->data;
RETURN_ZVAL(data, 1, 0);
}
}
/* }}} */
/* iterator handler table */
zend_object_iterator_funcs spl_dllist_it_funcs = {
spl_dllist_it_dtor,
spl_dllist_it_valid,
spl_dllist_it_get_current_data,
spl_dllist_it_get_current_key,
spl_dllist_it_move_forward,
spl_dllist_it_rewind
};
zend_object_iterator *spl_dllist_get_iterator(zend_class_entry *ce, zval *object, int by_ref TSRMLS_DC) /* {{{ */
{
spl_dllist_it *iterator;
spl_dllist_object *dllist_object = (spl_dllist_object*)zend_object_store_get_object(object TSRMLS_CC);
if (by_ref) {
zend_throw_exception(spl_ce_RuntimeException, "An iterator cannot be used with foreach by reference", 0 TSRMLS_CC);
return NULL;
}
iterator = emalloc(sizeof(spl_dllist_it));
Z_ADDREF_P(object);
iterator->intern.it.data = (void*)object;
iterator->intern.it.funcs = &spl_dllist_it_funcs;
iterator->intern.ce = ce;
iterator->intern.value = NULL;
iterator->traverse_position = dllist_object->traverse_position;
iterator->traverse_pointer = dllist_object->traverse_pointer;
iterator->flags = dllist_object->flags & SPL_DLLIST_IT_MASK;
SPL_LLIST_CHECK_ADDREF(iterator->traverse_pointer);
iterator->object = dllist_object;
return (zend_object_iterator*)iterator;
}
/* }}} */
/* Function/Class/Method definitions */
static
ZEND_BEGIN_ARG_INFO(arginfo_dllist_setiteratormode, 0)
ZEND_ARG_INFO(0, flags)
ZEND_END_ARG_INFO()
static
ZEND_BEGIN_ARG_INFO(arginfo_dllist_push, 0)
ZEND_ARG_INFO(0, value)
ZEND_END_ARG_INFO()
static
ZEND_BEGIN_ARG_INFO_EX(arginfo_dllist_offsetGet, 0, 0, 1)
ZEND_ARG_INFO(0, index)
ZEND_END_ARG_INFO()
static
ZEND_BEGIN_ARG_INFO_EX(arginfo_dllist_offsetSet, 0, 0, 2)
ZEND_ARG_INFO(0, index)
ZEND_ARG_INFO(0, newval)
ZEND_END_ARG_INFO()
static const zend_function_entry spl_funcs_SplQueue[] = {
SPL_MA(SplQueue, enqueue, SplDoublyLinkedList, push, arginfo_dllist_push, ZEND_ACC_PUBLIC)
SPL_MA(SplQueue, dequeue, SplDoublyLinkedList, shift, NULL, ZEND_ACC_PUBLIC)
{NULL, NULL, NULL}
};
static const zend_function_entry spl_funcs_SplDoublyLinkedList[] = {
SPL_ME(SplDoublyLinkedList, pop, NULL, ZEND_ACC_PUBLIC)
SPL_ME(SplDoublyLinkedList, shift, NULL, ZEND_ACC_PUBLIC)
SPL_ME(SplDoublyLinkedList, push, arginfo_dllist_push, ZEND_ACC_PUBLIC)
SPL_ME(SplDoublyLinkedList, unshift, arginfo_dllist_push, ZEND_ACC_PUBLIC)
SPL_ME(SplDoublyLinkedList, top, NULL, ZEND_ACC_PUBLIC)
SPL_ME(SplDoublyLinkedList, bottom, NULL, ZEND_ACC_PUBLIC)
SPL_ME(SplDoublyLinkedList, count, NULL, ZEND_ACC_PUBLIC)
SPL_ME(SplDoublyLinkedList, isEmpty, NULL, ZEND_ACC_PUBLIC)
SPL_ME(SplDoublyLinkedList, setIteratorMode, arginfo_dllist_setiteratormode, ZEND_ACC_PUBLIC)
SPL_ME(SplDoublyLinkedList, getIteratorMode, NULL, ZEND_ACC_PUBLIC)
SPL_ME(SplDoublyLinkedList, offsetExists, arginfo_dllist_offsetGet, ZEND_ACC_PUBLIC)
SPL_ME(SplDoublyLinkedList, offsetGet, arginfo_dllist_offsetGet, ZEND_ACC_PUBLIC)
SPL_ME(SplDoublyLinkedList, offsetSet, arginfo_dllist_offsetSet, ZEND_ACC_PUBLIC)
SPL_ME(SplDoublyLinkedList, offsetUnset, arginfo_dllist_offsetGet, ZEND_ACC_PUBLIC)
SPL_ME(SplDoublyLinkedList, rewind, NULL, ZEND_ACC_PUBLIC)
SPL_ME(SplDoublyLinkedList, current, NULL, ZEND_ACC_PUBLIC)
SPL_ME(SplDoublyLinkedList, key, NULL, ZEND_ACC_PUBLIC)
SPL_ME(SplDoublyLinkedList, next, NULL, ZEND_ACC_PUBLIC)
SPL_ME(SplDoublyLinkedList, valid, NULL, ZEND_ACC_PUBLIC)
{NULL, NULL, NULL}
};
/* }}} */
PHP_MINIT_FUNCTION(spl_dllist) /* {{{ */
{
REGISTER_SPL_STD_CLASS_EX(SplDoublyLinkedList, spl_dllist_object_new, spl_funcs_SplDoublyLinkedList);
memcpy(&spl_handler_SplDoublyLinkedList, zend_get_std_object_handlers(), sizeof(zend_object_handlers));
spl_handler_SplDoublyLinkedList.clone_obj = spl_dllist_object_clone;
spl_handler_SplDoublyLinkedList.count_elements = spl_dllist_object_count_elements;
REGISTER_SPL_CLASS_CONST_LONG(SplDoublyLinkedList, "IT_MODE_LIFO", SPL_DLLIST_IT_LIFO);
REGISTER_SPL_CLASS_CONST_LONG(SplDoublyLinkedList, "IT_MODE_FIFO", 0);
REGISTER_SPL_CLASS_CONST_LONG(SplDoublyLinkedList, "IT_MODE_DELETE",SPL_DLLIST_IT_DELETE);
REGISTER_SPL_CLASS_CONST_LONG(SplDoublyLinkedList, "IT_MODE_KEEP", 0);
REGISTER_SPL_IMPLEMENTS(SplDoublyLinkedList, Iterator);
REGISTER_SPL_IMPLEMENTS(SplDoublyLinkedList, Countable);
REGISTER_SPL_IMPLEMENTS(SplDoublyLinkedList, ArrayAccess);
spl_ce_SplDoublyLinkedList->get_iterator = spl_dllist_get_iterator;
REGISTER_SPL_SUB_CLASS_EX(SplQueue, SplDoublyLinkedList, spl_dllist_object_new, spl_funcs_SplQueue);
REGISTER_SPL_SUB_CLASS_EX(SplStack, SplDoublyLinkedList, spl_dllist_object_new, NULL);
return SUCCESS;
}
/* }}} */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: fdm=marker
* vim: noet sw=4 ts=4
*/
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