include/nvif/unpack.h

0001 /* SPDX-License-Identifier: MIT */
0002 #ifndef __NVIF_UNPACK_H__
0003 #define __NVIF_UNPACK_H__
0004
0005 #define nvif_unvers(r,d,s,m) ({                                                \
0006     void **_data = (d); __u32 *_size = (s); int _ret = (r);                \
0007     if (_ret == -ENOSYS && *_size == sizeof(m)) {                          \
0008         *_data = NULL;                                                 \
0009         *_size = _ret = 0;                                             \
0010     }                                                                      \
0011     _ret;                                                                  \
0012 })
0013
0014 #define nvif_unpack(r,d,s,m,vl,vh,x) ({                                        \
0015     void **_data = (d); __u32 *_size = (s);                                \
0016     int _ret = (r), _vl = (vl), _vh = (vh);                                \
0017     if (_ret == -ENOSYS && *_size >= sizeof(m) &&                          \
0018         (m).version >= _vl && (m).version <= _vh) {                        \
0019         *_data = (__u8 *)*_data + sizeof(m);                           \
0020         *_size = *_size - sizeof(m);                                   \
0021         if (_ret = 0, !(x)) {                                          \
0022             _ret = *_size ? -E2BIG : 0;                            \
0023             *_data = NULL;                                         \
0024             *_size = 0;                                            \
0025         }                                                              \
0026     }                                                                      \
0027     _ret;                                                                  \
0028 })
0029 #endif