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54 lines
1.0 KiB
PHP
54 lines
1.0 KiB
PHP
--TEST--
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FFI 032: bit-fields access
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--SKIPIF--
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<?php require_once('skipif.inc'); ?>
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--INI--
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ffi.enable=1
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--FILE--
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<?php
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$p = FFI::new("
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union {
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struct __attribute__((packed)) {
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int a:2;
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unsigned long long b:64;
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int c:3;
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unsigned int d:3;
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} s;
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uint8_t i[9];
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}");
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var_dump(FFI::sizeof($p));
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for ($i = -5; $i < 9; $i++) {
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$p->s->c = $i;
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$p->s->d = $i;
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echo "$i => 3-bit int {$p->s->c}, 3-bit uint {$p->s->d}\n";
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}
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$p->s->a = 0;
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$p->s->c = 0;
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$p->s->d = 0;
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$p->s->b = 0x7fffffff;
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echo "0x";
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for ($i = 9; $i > 0;) {
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printf("%02x", $p->i[--$i]);
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}
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echo "\n";
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?>
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ok
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--EXPECT--
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int(9)
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-5 => 3-bit int 3, 3-bit uint 3
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-4 => 3-bit int -4, 3-bit uint 4
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-3 => 3-bit int -3, 3-bit uint 5
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-2 => 3-bit int -2, 3-bit uint 6
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-1 => 3-bit int -1, 3-bit uint 7
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0 => 3-bit int 0, 3-bit uint 0
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1 => 3-bit int 1, 3-bit uint 1
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2 => 3-bit int 2, 3-bit uint 2
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3 => 3-bit int 3, 3-bit uint 3
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4 => 3-bit int -4, 3-bit uint 4
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5 => 3-bit int -3, 3-bit uint 5
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6 => 3-bit int -2, 3-bit uint 6
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7 => 3-bit int -1, 3-bit uint 7
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8 => 3-bit int 0, 3-bit uint 0
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0x0000000001fffffffc
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ok
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