xref: /PHP-8.2/ext/ffi/tests/032.phpt (revision bd9f4fa6)
1--TEST--
2FFI 032: bit-fields access
3--EXTENSIONS--
4ffi
5--INI--
6ffi.enable=1
7--FILE--
8<?php
9$p = FFI::new("
10    union {
11        struct __attribute__((packed)) {
12            int a:2;
13            unsigned long long b:64;
14            int c:3;
15            unsigned int d:3;
16        } s;
17    uint8_t i[9];
18}");
19var_dump(FFI::sizeof($p));
20for ($i = -5; $i < 9; $i++) {
21    $p->s->c = $i;
22    $p->s->d = $i;
23    echo "$i => 3-bit int {$p->s->c}, 3-bit uint {$p->s->d}\n";
24}
25$p->s->a = 0;
26$p->s->c = 0;
27$p->s->d = 0;
28$p->s->b = 0x7fffffff;
29echo "0x";
30for ($i = 9; $i > 0;) {
31    printf("%02x", $p->i[--$i]);
32}
33echo "\n";
34?>
35ok
36--EXPECT--
37int(9)
38-5 => 3-bit int 3, 3-bit uint 3
39-4 => 3-bit int -4, 3-bit uint 4
40-3 => 3-bit int -3, 3-bit uint 5
41-2 => 3-bit int -2, 3-bit uint 6
42-1 => 3-bit int -1, 3-bit uint 7
430 => 3-bit int 0, 3-bit uint 0
441 => 3-bit int 1, 3-bit uint 1
452 => 3-bit int 2, 3-bit uint 2
463 => 3-bit int 3, 3-bit uint 3
474 => 3-bit int -4, 3-bit uint 4
485 => 3-bit int -3, 3-bit uint 5
496 => 3-bit int -2, 3-bit uint 6
507 => 3-bit int -1, 3-bit uint 7
518 => 3-bit int 0, 3-bit uint 0
520x0000000001fffffffc
53ok
54