32 lines
1.2 KiB
Diff
32 lines
1.2 KiB
Diff
commit 7c1ec1b7d0b476610c811b0babeab831e626c088
|
|
Author: Paul Eggert <eggert@cs.ucla.edu>
|
|
Date: Sat Jun 15 08:40:41 2024 -0700
|
|
|
|
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
|
|
|
|
diff --git a/manual/examples/timespec_subtract.c b/manual/examples/timespec_subtract.c
|
|
index 380d173aab..26607409c8 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. */
|