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