calc.c

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#include <unistd.h>
#include <signal.h>
 
#include <grass/calc.h>
 
/****************************************************************************/
 
volatile int floating_point_exception;
volatile int floating_point_exception_occurred;
 
int columns;
 
/****************************************************************************/
 
static void handle_fpe(int n UNUSED)
{
    floating_point_exception = 1;
    floating_point_exception_occurred = 1;
}
 
void pre_exec(void)
{
#ifndef _WIN32
#ifdef SIGFPE
    struct sigaction act;
 
    act.sa_handler = &handle_fpe;
    act.sa_flags = 0;
    sigemptyset(&act.sa_mask);
 
    sigaction(SIGFPE, &act, NULL);
#endif
#endif
 
    floating_point_exception_occurred = 0;
}
 
void post_exec(void)
{
#ifndef _WIN32
#ifdef SIGFPE
    struct sigaction act;
 
    act.sa_handler = SIG_DFL;
    act.sa_flags = 0;
    sigemptyset(&act.sa_mask);
 
    sigaction(SIGFPE, &act, NULL);
#endif
#endif
}
 
/****************************************************************************/
 
void calc_init(int cols)
{
    columns = cols;
}
 
/****************************************************************************/