mirror of
https://sourceware.org/git/glibc.git
synced 2025-12-03 12:11:17 +03:00
5a82c74822
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
/* Subtract two struct timespec values.
|
|
Copyright (C) 2011-2019 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library and is also part of gnulib.
|
|
Patches to this file should be submitted to both projects.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
/* Return the difference between two timespec values A and B. On
|
|
overflow, return an extremal value. This assumes 0 <= tv_nsec <
|
|
TIMESPEC_HZ. */
|
|
|
|
#include <config.h>
|
|
#include "timespec.h"
|
|
|
|
#include "intprops.h"
|
|
|
|
struct timespec
|
|
timespec_sub (struct timespec a, struct timespec b)
|
|
{
|
|
time_t rs = a.tv_sec;
|
|
time_t bs = b.tv_sec;
|
|
int ns = a.tv_nsec - b.tv_nsec;
|
|
int rns = ns;
|
|
time_t tmin = TYPE_MINIMUM (time_t);
|
|
time_t tmax = TYPE_MAXIMUM (time_t);
|
|
|
|
if (ns < 0)
|
|
{
|
|
rns = ns + TIMESPEC_HZ;
|
|
if (bs < tmax)
|
|
bs++;
|
|
else if (- TYPE_SIGNED (time_t) < rs)
|
|
rs--;
|
|
else
|
|
goto low_overflow;
|
|
}
|
|
|
|
/* INT_SUBTRACT_WRAPV is not appropriate since time_t might be unsigned.
|
|
In theory time_t might be narrower than int, so plain
|
|
INT_SUBTRACT_OVERFLOW does not suffice. */
|
|
if (! INT_SUBTRACT_OVERFLOW (rs, bs) && tmin <= rs - bs && rs - bs <= tmax)
|
|
rs -= bs;
|
|
else
|
|
{
|
|
if (rs < 0)
|
|
{
|
|
low_overflow:
|
|
rs = tmin;
|
|
rns = 0;
|
|
}
|
|
else
|
|
{
|
|
rs = tmax;
|
|
rns = TIMESPEC_HZ - 1;
|
|
}
|
|
}
|
|
|
|
return make_timespec (rs, rns);
|
|
}
|