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/* Expression evaluation for plural form selection.
Copyright (C) 2000-2003, 2005, 2015 Free Software Foundation, Inc.
Written by Ulrich Drepper <drepper@cygnus.com>, 2000.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
/* Specification. */
#include "plural-eval.h"
#include <stddef.h>
#include <signal.h>
#include "plural-exp.h"
#define STATIC /*extern*/
/* Include the expression evaluation code from libintl, this time with
'extern' linkage. */
#include "eval-plural.h"
/* Exit point. Must be set before calling install_sigfpe_handler(). */
sigjmp_buf sigfpe_exit;
#if USE_SIGINFO
/* Additional information that is set before sigfpe_exit is invoked. */
int sigfpe_code;
/* Signal handler called in case of arithmetic exception (e.g. division
by zero) during plural_eval. */
static void
sigfpe_handler (int sig, siginfo_t *sip, void *scp)
{
sigfpe_code = sip->si_code;
siglongjmp (sigfpe_exit, 1);
}
#else
/* Signal handler called in case of arithmetic exception (e.g. division
by zero) during plural_eval. */
static void
sigfpe_handler (int sig)
{
siglongjmp (sigfpe_exit, 1);
}
#endif
void
install_sigfpe_handler (void)
{
#if USE_SIGINFO
struct sigaction action;
action.sa_sigaction = sigfpe_handler;
action.sa_flags = SA_SIGINFO;
sigemptyset (&action.sa_mask);
sigaction (SIGFPE, &action, (struct sigaction *) NULL);
#else
signal (SIGFPE, sigfpe_handler);
#endif
}
void
uninstall_sigfpe_handler (void)
{
#if USE_SIGINFO
struct sigaction action;
action.sa_handler = SIG_DFL;
action.sa_flags = 0;
sigemptyset (&action.sa_mask);
sigaction (SIGFPE, &action, (struct sigaction *) NULL);
#else
signal (SIGFPE, SIG_DFL);
#endif
}
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