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Backport SKIP_BACK with type control from v3

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This commit is contained in:
Igor Putovny 2024-05-30 12:27:54 +02:00
parent 17fab002a1
commit c72186fe08
1 changed files with 1 additions and 1 deletions
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2
lib/birdlib.h
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@ -19,7 +19,7 @@
struct align_probe { char x; long int y; };
#define OFFSETOF(s, i) ((size_t) &((s *)0)->i)
#define SKIP_BACK(s, i, p) ((s *)((char *)p - OFFSETOF(s, i)))
#define SKIP_BACK(s, i, p) ({ s *_ptr = ((s *)((char *)p - OFFSETOF(s, i))); SAME_TYPE(&_ptr->i, p); _ptr; })
#define BIRD_ALIGN(s, a) (((s)+a-1)&~(a-1))
#define CPU_STRUCT_ALIGN (sizeof(struct align_probe))