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| author | Mattias Andrée <maandree@operamail.com> | 2015-11-16 23:01:22 +0100 |
|---|---|---|
| committer | Mattias Andrée <maandree@operamail.com> | 2015-11-16 23:01:22 +0100 |
| commit | 8c2dc5ccec7c6726b5414a2b62a596f0531d0463 (patch) | |
| tree | b21f10236c933f9c79a2904f967fe3337fd06205 /include | |
| parent | increase readability (diff) | |
| download | slibc-8c2dc5ccec7c6726b5414a2b62a596f0531d0463.tar.gz slibc-8c2dc5ccec7c6726b5414a2b62a596f0531d0463.tar.bz2 slibc-8c2dc5ccec7c6726b5414a2b62a596f0531d0463.tar.xz | |
add macros for overflow check
Signed-off-by: Mattias Andrée <maandree@operamail.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/slibc/internals.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/slibc/internals.h b/include/slibc/internals.h index 099e2e7..b3f6235 100644 --- a/include/slibc/internals.h +++ b/include/slibc/internals.h @@ -18,9 +18,24 @@ #ifndef _SLIBC_INTERNALS_H #define _SLIBC_INTERNALS_H +#include <errno.h> + + #define _(msg) msg +#define OVERFLOW(op, a, b, res, errnum, failrc) \ + do \ + if (__builtin_##op##_overflow(a, b, res)) \ + return errno = (errnum), (failrc); \ + while (0) + + +#define MEM_OVERFLOW(op, a, b, res) \ + OVERFLOW(op, a, b, res, ENOMEM, NULL) + + + #endif |