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| author | David Herrmann <dh.herrmann@gmail.com> | 2014-08-22 13:55:57 +0200 |
|---|---|---|
| committer | David Herrmann <dh.herrmann@gmail.com> | 2014-08-22 14:01:05 +0200 |
| commit | 40a1eebde6be7ac3f1885147fc24e06ad1da260c (patch) | |
| tree | a03d9895d6577fe38480633774050f41ae5ba079 /src/shared | |
| parent | 0975b63fb31263e535a2d26ed41e66e23f468bc5 (diff) | |
shared: add MAXSIZE() and use it in resolved
The MAXSIZE() macro takes two types and returns the size of the larger
one. It is much simpler to use than MAX(sizeof(A), sizeof(B)) and also
avoids any compiler-extensions, unlike CONST_MAX() and MAX() (which are
needed to avoid evaluating arguments more than once). This was suggested
by Daniele Nicolodi <daniele@grinta.net>.
Also make resolved use this macro instead of CONST_MAX(). This enhances
readability quite a bit.
Diffstat (limited to 'src/shared')
| -rw-r--r-- | src/shared/macro.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/shared/macro.h b/src/shared/macro.h index 179b24c98..43fa3e556 100644 --- a/src/shared/macro.h +++ b/src/shared/macro.h @@ -149,6 +149,9 @@ static inline unsigned long ALIGN_POWER2(unsigned long u) { ((_A) > (_B)) ? (_A) : (_B), \ (void)0)) +/* takes two types and returns the size of the larger one */ +#define MAXSIZE(A, B) (sizeof(union _packed_ { typeof(A) a; typeof(B) b; })) + #define MAX3(x,y,z) \ __extension__ ({ \ const typeof(x) _c = MAX(x,y); \ |