xref: /PHP-8.2/ext/ffi/tests/list.phpt (revision bd9f4fa6)
1--TEST--
2FFI Double linked lists
3--EXTENSIONS--
4ffi
5--INI--
6ffi.enable=1
7--FILE--
8<?php
9class DList {
10    private static $ffi = null;
11    private $root;
12
13    function __construct() {
14        if (is_null(self::$ffi)) {
15            self::$ffi =
16                FFI::cdef("
17                    typedef struct _dlist dlist;
18                    struct _dlist {
19                        int data;
20                        dlist *prev;
21                        dlist *next;
22                    };
23                ");
24        }
25        $node = FFI::addr(self::$ffi->new("dlist", false));
26        $node->data = 0;
27        $node->next = $node;
28        $node->prev = $node;
29        $this->root = $node;
30    }
31
32    function __destruct() {
33        $root = $this->root;
34        $node = $root->next;
35        while ($node != $root) {
36            $prev = $node;
37            $node = $node->next;
38            FFI::free($prev);
39        }
40        FFI::free($root);
41    }
42
43    function add(int $data) {
44        $node = FFI::addr(self::$ffi->new("dlist", false));
45        $node->data = $data;
46        $node->next = $this->root;
47        $node->prev = $this->root->prev;
48        $this->root->prev->next = $node;
49        $this->root->prev = $node;
50    }
51
52    function del(int $data) {
53        $root = $this->root;
54        $node = $root->next;
55        while ($node != $root) {
56            if ($node->data == $data) {
57                $node->prev->next = $node->next;
58                $node->next->prev = $node->prev;
59                FFI::free($node);
60                break;
61            }
62            $node = $node->next;
63        }
64    }
65
66    function print() {
67        echo "[";
68        $first = true;
69        $root = $this->root;
70        $node = $root->next;
71        while ($node != $root) {
72            if (!$first) {
73                echo ", ";
74            } else {
75                $first = false;
76            }
77            echo $node->data;
78            $node = $node->next;
79        }
80        echo "]\n";
81    }
82}
83
84$dlist = new Dlist;
85$dlist->add(1);
86$dlist->add(3);
87$dlist->add(5);
88$dlist->print();
89$dlist->del(3);
90$dlist->print();
91echo "OK\n";
92?>
93--EXPECT--
94[1, 3, 5]
95[1, 5]
96OK
97