unpack.h revision 3f012e29 
1#ifndef __NVIF_UNPACK_H__
2#define __NVIF_UNPACK_H__
3
4#define nvif_unvers(r,d,s,m) ({                                                \
5	void **_data = (d); __u32 *_size = (s); int _ret = (r);                \
6	if (_ret == -ENOSYS && *_size == sizeof(m)) {                          \
7		*_data = NULL;                                                 \
8		*_size = _ret = 0;                                             \
9	}                                                                      \
10	_ret;                                                                  \
11})
12
13#define nvif_unpack(r,d,s,m,vl,vh,x) ({                                        \
14	void **_data = (d); __u32 *_size = (s);                                \
15	int _ret = (r), _vl = (vl), _vh = (vh);                                \
16	if (_ret == -ENOSYS && *_size >= sizeof(m) &&                          \
17	    (m).version >= _vl && (m).version <= _vh) {                        \
18		*_data = (__u8 *)*_data + sizeof(m);                           \
19		*_size = *_size - sizeof(m);                                   \
20		if (_ret = 0, !(x)) {                                          \
21			_ret = *_size ? -E2BIG : 0;                            \
22			*_data = NULL;                                         \
23			*_size = 0;                                            \
24		}                                                              \
25	}                                                                      \
26	_ret;                                                                  \
27})
28#endif
29