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/* Public Domain Curses */
 
#include <curspriv.h>
 
RCSID("$Id: beep.c,v 1.1 2009/05/10 08:29:53 jld Exp $")
 
/*man-start**************************************************************
 
  Name:                                                         beep
 
  Synopsis:
        int beep(void);
        int flash(void);
 
  Description:
        beep() sounds the audible bell on the terminal, if possible;
        if not, it calls flash().
 
        flash() "flashes" the screen, by inverting the foreground and
        background of every cell, pausing, and then restoring the
        original attributes.
 
  Return Value:
        These functions return OK.
 
  Portability                                X/Open    BSD    SYS V
        beep                                    Y       Y       Y
        flash                                   Y       Y       Y
 
**man-end****************************************************************/
 
int beep(void)
{
    PDC_LOG(("beep() - called\n"));
 
    if (SP->audible)
        PDC_beep();
    else
        flash();
 
    return OK;
}
 
int flash(void)
{
    int z, y, x;
 
    PDC_LOG(("flash() - called\n"));
 
    /* Reverse each cell; wait; restore the screen */
 
    for (z = 0; z < 2; z++)
    {
        for (y = 0; y < LINES; y++)
            for (x = 0; x < COLS; x++)
                curscr->_y[y][x] ^= A_REVERSE;
 
        wrefresh(curscr);
 
        if (!z)
            napms(50);
    }
 
    return OK;
}