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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* filename: m-init.c *
* *
* UTIL C-source: Medical Image Conversion Utility *
* *
* purpose : initialize library *
* *
* project : (X)MedCon by Erik Nolf *
* *
* Functions : MdcIgnoreSIGFPE() - ignore floating point exception *
* MdcAcceptSIGFPE() - accept floating point exception *
* MdcSetLocale() - set POSIX locale and preserve *
* MdcUnsetLocale() - unset POSIX locale and retore *
* MdcInit() - library usage initialized *
* MdcFinish() - library usage finished *
* *
* Notes : no dynamic memory allocations here *
* *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* $Id: m-init.c,v 1.9 2008/01/23 21:28:36 enlf Exp $
*/
/*
Copyright (C) 1997-2008 by Erik Nolf
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 2, 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, write to the Free Software Foundation, Inc.,
59 Place - Suite 330, Boston, MA 02111-1307, USA. */
/****************************************************************************
H E A D E R S
****************************************************************************/
#include "m-depend.h"
#include <signal.h>
#include <locale.h>
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include "m-init.h"
/****************************************************************************
D E F I N E S
****************************************************************************/
static void (*mdc_old_handler)(int);
static char *mdc_old_locale = NULL;
/****************************************************************************
F U N C T I O N S
****************************************************************************/
void MdcIgnoreSIGFPE(void) /* before Accept! */
{
mdc_old_handler = signal(SIGFPE, SIG_IGN);
}
void MdcAcceptSIGFPE(void) /* after Ignore! */
{
signal(SIGFPE, mdc_old_handler);
}
void MdcSetLocale(void)
{
char *cur_locale;
static char locale_string[30];
/* preserve current locale */
cur_locale = setlocale(LC_ALL,NULL);
if (cur_locale == NULL) return;
if (strlen(cur_locale) >= 30) return;
strcpy(locale_string,cur_locale);
mdc_old_locale = locale_string;
/* set POSIX locale */
setlocale(LC_ALL, "POSIX");
}
void MdcUnsetLocale(void)
{
if (mdc_old_locale == NULL) return;
/* restore previous locale */
setlocale(LC_ALL,mdc_old_locale);
/* clean up */
mdc_old_locale = NULL;
}
void MdcInit(void)
{
/* ignore floating point exception */
MdcIgnoreSIGFPE();
/* set POSIX locale */
MdcSetLocale();
}
void MdcFinish(void)
{
/* accept floating point exception */
MdcAcceptSIGFPE();
/* unset POSIX locale */
MdcUnsetLocale();
}
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