lib/libcurses/chgat.c

   1 /*      $NetBSD: chgat.c,v 1.5 2012/09/28 06:05:19 blymn Exp $  */
   2
   3 /*
   4  * Copyright (c) 2009 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Joerg Sonnenberger.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __RCSID("$NetBSD: chgat.c,v 1.5 2012/09/28 06:05:19 blymn Exp $");
  34
  35 #include "curses.h"
  36 #include "curses_private.h"
  37
  38 int
  39 chgat(int n, attr_t attr, short color, const void *opts)
  40 {
  41         return wchgat(stdscr, n, attr, color, opts);
  42 }
  43
  44 int
  45 mvchgat(int y, int x, int n, attr_t attr, short color,
  46     const void *opts)
  47 {
  48         return mvwchgat(stdscr, y, x, n, attr, color, opts);
  49 }
  50
  51 int
  52 wchgat(WINDOW *win, int n, attr_t attr, short color, const void *opts)
  53 {
  54         return mvwchgat(win, win->cury, win->curx, n, attr, color, opts);
  55 }
  56
  57 int
  58 mvwchgat(WINDOW *win , int y, int x, int count, attr_t attr, short color,
  59     const void *opts)
  60 {
  61         __LINE *lp;
  62         __LDATA *lc;
  63
  64         if (x < 0 || y < 0)
  65                 return (ERR);
  66         if (x >= win->maxx || y >= win->maxy)
  67                 return (ERR);
  68
  69         attr = (attr & ~__COLOR) | COLOR_PAIR(color);
  70
  71         if (count < 0 || count > win->maxx - x)
  72                 count = win->maxx - x;
  73
  74 #ifdef DEBUG
  75         __CTRACE(__CTRACE_ATTR, "mvwchgat: x: %d y: %d count: %d attr: 0x%x "
  76                  "color pair %d\n", x, y, count, (attr & ~__COLOR),
  77                  PAIR_NUMBER(color));
  78 #endif
  79         lp = win->alines[y];
  80         lc = &lp->line[x];
  81
  82         if (x + win->ch_off < *lp->firstchp)
  83                 *lp->firstchp = x + win->ch_off;
  84         if (x + win->ch_off + count > *lp->lastchp)
  85                 *lp->lastchp = x + win->ch_off + count;
  86
  87         while (count-- > 0) {
  88                 lp->flags |= __ISDIRTY;
  89 #ifdef HAVE_WCHAR
  90                 lc->attr = (lc->attr & ~WA_ATTRIBUTES) | attr;
  91 #else
  92                 lc->attr = attr;
  93 #endif
  94                 ++lc;
  95         }
  96
  97         return OK;
  98 }