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| author | Paul Eggert <eggert@cs.ucla.edu> | 2024-06-15 08:40:41 -0700 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2024-06-15 08:53:50 -0700 |
| commit | 7c1ec1b7d0b476610c811b0babeab831e626c088 (patch) | |
| tree | 7dc1f3df45f7ca837322ec143436a5ad3e6922b6 | |
| parent | ee768a30fe9099972dad04c49972c2508a208b9b (diff) | |
| download | glibc-7c1ec1b7d0b476610c811b0babeab831e626c088.zip glibc-7c1ec1b7d0b476610c811b0babeab831e626c088.tar.gz glibc-7c1ec1b7d0b476610c811b0babeab831e626c088.tar.bz2 | |
Minor code improvement to timespec_subtract example
This saves a few instructions.
BORROW cannot be -1, since NSEC_DIFF is at most 999999999.
Idea taken from Gnulib, here:
https://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=fe33f943054b93af8b965ce6564b8713b0979a21
| -rw-r--r-- | manual/examples/timespec_subtract.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/manual/examples/timespec_subtract.c b/manual/examples/timespec_subtract.c index 380d173..2660740 100644 --- a/manual/examples/timespec_subtract.c +++ b/manual/examples/timespec_subtract.c @@ -22,12 +22,12 @@ bool timespec_subtract (struct timespec *r, - struct timespec x, struct timespec y) + struct timespec x, struct timespec y) { - /* Compute nanoseconds, setting @var{borrow} to 1, 0, or -1 + /* Compute nanoseconds, setting @var{borrow} to 1 or 0 for propagation into seconds. */ long int nsec_diff = x.tv_nsec - y.tv_nsec; - int borrow = (nsec_diff < 0) - ! (nsec_diff < 1000000000); + bool borrow = nsec_diff < 0; r->tv_nsec = nsec_diff + 1000000000 * borrow; /* Compute seconds, returning true if this overflows. */ |