release/src/router/libncurses/ncurses/base/lib_redrawln.c

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  28
  29 /****************************************************************************
  30  *  Author: Thomas E. Dickey <dickey@clark.net> 1997                        *
  31  ****************************************************************************/
  32
  33 /*
  34  *      lib_redrawln.c
  35  *
  36  *      The routine wredrawln().
  37  *
  38  */
  39
  40 #include <curses.priv.h>
  41
  42 MODULE_ID("$Id: lib_redrawln.c,v 1.17 2010/12/19 00:03:23 tom Exp $")
  43
  44 NCURSES_EXPORT(int)
  45 wredrawln(WINDOW *win, int beg, int num)
  46 {
  47     int i;
  48     int end;
  49     size_t len;
  50     SCREEN *sp;
  51
  52     T((T_CALLED("wredrawln(%p,%d,%d)"), (void *) win, beg, num));
  53
  54     if (win == 0)
  55         returnCode(ERR);
  56
  57     sp = _nc_screen_of(win);
  58
  59     if (beg < 0)
  60         beg = 0;
  61
  62     if (touchline(win, beg, num) == ERR)
  63         returnCode(ERR);
  64
  65     if (touchline(CurScreen(sp), beg + win->_begy, num) == ERR)
  66         returnCode(ERR);
  67
  68     end = beg + num;
  69     if (end > CurScreen(sp)->_maxy + 1 - win->_begy)
  70         end = CurScreen(sp)->_maxy + 1 - win->_begy;
  71     if (end > win->_maxy + 1)
  72         end = win->_maxy + 1;
  73
  74     len = (size_t) (win->_maxx + 1);
  75     if (len > (size_t) (CurScreen(sp)->_maxx + 1 - win->_begx))
  76         len = (size_t) (CurScreen(sp)->_maxx + 1 - win->_begx);
  77     len *= sizeof(CurScreen(sp)->_line[0].text[0]);
  78
  79     for (i = beg; i < end; i++) {
  80         int crow = i + win->_begy;
  81
  82         memset(CurScreen(sp)->_line[crow].text + win->_begx, 0, len);
  83         NCURSES_SP_NAME(_nc_make_oldhash) (NCURSES_SP_ARGx crow);
  84     }
  85
  86     returnCode(OK);
  87 }