payloads/libpayload/curses/PDCurses/pdcurses/beep.c

   1 /* Public Domain Curses */
   2
   3 #include <curspriv.h>
   4
   5 RCSID("$Id: beep.c,v 1.34 2008/07/13 16:08:17 wmcbrine Exp $")
   6
   7 /*man-start**************************************************************
   8
   9   Name:                                                         beep
  10
  11   Synopsis:
  12         int beep(void);
  13         int flash(void);
  14
  15   Description:
  16         beep() sounds the audible bell on the terminal, if possible;
  17         if not, it calls flash().
  18
  19         flash() "flashes" the screen, by inverting the foreground and
  20         background of every cell, pausing, and then restoring the
  21         original attributes.
  22
  23   Return Value:
  24         These functions return OK.
  25
  26   Portability                                X/Open    BSD    SYS V
  27         beep                                    Y       Y       Y
  28         flash                                   Y       Y       Y
  29
  30 **man-end****************************************************************/
  31
  32 int beep(void)
  33 {
  34     PDC_LOG(("beep() - called\n"));
  35
  36     if (SP->audible)
  37         PDC_beep();
  38     else
  39         flash();
  40
  41     return OK;
  42 }
  43
  44 int flash(void)
  45 {
  46     int z, y, x;
  47
  48     PDC_LOG(("flash() - called\n"));
  49
  50     /* Reverse each cell; wait; restore the screen */
  51
  52     for (z = 0; z < 2; z++)
  53     {
  54         for (y = 0; y < LINES; y++)
  55             for (x = 0; x < COLS; x++)
  56                 curscr->_y[y][x] ^= A_REVERSE;
  57
  58         wrefresh(curscr);
  59
  60         if (!z)
  61             napms(50);
  62     }
  63
  64     return OK;
  65 }