GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcurses/base/lib_newwin.c Lines: 0 122 0.0 %
Date: 2017-11-07 Branches: 0 84 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: lib_newwin.c,v 1.6 2010/01/12 23:22:06 nicm Exp $	*/
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/****************************************************************************
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 * Copyright (c) 1998-2007,2008 Free Software Foundation, Inc.              *
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 *                                                                          *
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 * Permission is hereby granted, free of charge, to any person obtaining a  *
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 * copy of this software and associated documentation files (the            *
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 * "Software"), to deal in the Software without restriction, including      *
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 * without limitation the rights to use, copy, modify, merge, publish,      *
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 * distribute, distribute with modifications, sublicense, and/or sell       *
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 * copies of the Software, and to permit persons to whom the Software is    *
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 * furnished to do so, subject to the following conditions:                 *
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 *                                                                          *
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 * The above copyright notice and this permission notice shall be included  *
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 * in all copies or substantial portions of the Software.                   *
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 *                                                                          *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
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 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
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 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
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 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
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 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
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 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
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 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
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 *                                                                          *
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 * Except as contained in this notice, the name(s) of the above copyright   *
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 * holders shall not be used in advertising or otherwise to promote the     *
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 * sale, use or other dealings in this Software without prior written       *
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 * authorization.                                                           *
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 ****************************************************************************/
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/****************************************************************************
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 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
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 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
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 *     and: Thomas E. Dickey                        1996-on                 *
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 ****************************************************************************/
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/*
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**	lib_newwin.c
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**
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**	The routines newwin(), subwin() and their dependent
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**
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*/
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#include <curses.priv.h>
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#include <stddef.h>
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MODULE_ID("$Id: lib_newwin.c,v 1.6 2010/01/12 23:22:06 nicm Exp $")
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#define window_is(name) ((sp)->_##name == win)
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#if USE_REENTRANT
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#define remove_window(name) \
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		sp->_##name = 0
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#else
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#define remove_window(name) \
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		sp->_##name = 0; \
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		if (win == name) \
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		    name = 0
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#endif
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static void
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remove_window_from_screen(WINDOW *win)
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{
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    SCREEN *sp;
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    for (each_screen(sp)) {
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	if (window_is(curscr)) {
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	    remove_window(curscr);
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	    break;
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	} else if (window_is(stdscr)) {
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	    remove_window(stdscr);
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	    break;
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	} else if (window_is(newscr)) {
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	    remove_window(newscr);
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	    break;
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	}
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    }
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}
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NCURSES_EXPORT(int)
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_nc_freewin(WINDOW *win)
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{
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    WINDOWLIST *p, *q;
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    int i;
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    int result = ERR;
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    T((T_CALLED("_nc_freewin(%p)"), win));
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    if (win != 0) {
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	if (_nc_try_global(curses) == 0) {
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	    q = 0;
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	    for (each_window(p)) {
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		if (&(p->win) == win) {
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		    remove_window_from_screen(win);
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		    if (q == 0)
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			_nc_windows = p->next;
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		    else
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			q->next = p->next;
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		    if (!(win->_flags & _SUBWIN)) {
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			for (i = 0; i <= win->_maxy; i++)
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			    FreeIfNeeded(win->_line[i].text);
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		    }
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		    free(win->_line);
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		    free(p);
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		    result = OK;
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		    T(("...deleted win=%p", win));
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		    break;
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		}
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		q = p;
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	    }
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	    _nc_unlock_global(curses);
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	}
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    }
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    returnCode(result);
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}
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NCURSES_EXPORT(WINDOW *)
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newwin(int num_lines, int num_columns, int begy, int begx)
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{
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    WINDOW *win;
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    NCURSES_CH_T *ptr;
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    int i;
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    T((T_CALLED("newwin(%d,%d,%d,%d)"), num_lines, num_columns, begy, begx));
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    if (begy < 0 || begx < 0 || num_lines < 0 || num_columns < 0)
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	returnWin(0);
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    if (num_lines == 0)
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	num_lines = SP->_lines_avail - begy;
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    if (num_columns == 0)
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	num_columns = screen_columns - begx;
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    if ((win = _nc_makenew(num_lines, num_columns, begy, begx, 0)) == 0)
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	returnWin(0);
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    for (i = 0; i < num_lines; i++) {
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	win->_line[i].text = typeCalloc(NCURSES_CH_T, (unsigned) num_columns);
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	if (win->_line[i].text == 0) {
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	    (void) _nc_freewin(win);
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	    returnWin(0);
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	}
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	for (ptr = win->_line[i].text;
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	     ptr < win->_line[i].text + num_columns;
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	     ptr++)
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	    SetChar(*ptr, BLANK_TEXT, BLANK_ATTR);
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    }
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    returnWin(win);
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}
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NCURSES_EXPORT(WINDOW *)
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derwin(WINDOW *orig, int num_lines, int num_columns, int begy, int begx)
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{
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    WINDOW *win;
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    int i;
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    int flags = _SUBWIN;
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    T((T_CALLED("derwin(%p,%d,%d,%d,%d)"), orig, num_lines, num_columns,
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       begy, begx));
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    /*
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     * make sure window fits inside the original one
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     */
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    if (begy < 0 || begx < 0 || orig == 0 || num_lines < 0 || num_columns < 0)
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	returnWin(0);
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    if (begy + num_lines > orig->_maxy + 1
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	|| begx + num_columns > orig->_maxx + 1)
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	returnWin(0);
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    if (num_lines == 0)
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	num_lines = orig->_maxy + 1 - begy;
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    if (num_columns == 0)
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	num_columns = orig->_maxx + 1 - begx;
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    if (orig->_flags & _ISPAD)
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	flags |= _ISPAD;
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    if ((win = _nc_makenew(num_lines, num_columns, orig->_begy + begy,
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			   orig->_begx + begx, flags)) == 0)
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	returnWin(0);
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    win->_pary = begy;
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    win->_parx = begx;
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    WINDOW_ATTRS(win) = WINDOW_ATTRS(orig);
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    win->_nc_bkgd = orig->_nc_bkgd;
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    for (i = 0; i < num_lines; i++)
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	win->_line[i].text = &orig->_line[begy++].text[begx];
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    win->_parent = orig;
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    returnWin(win);
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}
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NCURSES_EXPORT(WINDOW *)
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subwin(WINDOW *w, int l, int c, int y, int x)
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{
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    T((T_CALLED("subwin(%p, %d, %d, %d, %d)"), w, l, c, y, x));
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    T(("parent has begy = %ld, begx = %ld", (long) w->_begy, (long) w->_begx));
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    returnWin(derwin(w, l, c, y - w->_begy, x - w->_begx));
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}
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static bool
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dimension_limit(int value)
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{
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    NCURSES_SIZE_T test = value;
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    return (test == value && value > 0);
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}
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NCURSES_EXPORT(WINDOW *)
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_nc_makenew(int num_lines, int num_columns, int begy, int begx, int flags)
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{
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    int i;
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    WINDOWLIST *wp;
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    WINDOW *win;
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    bool is_pad = (flags & _ISPAD);
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    T((T_CALLED("_nc_makenew(%d,%d,%d,%d)"), num_lines, num_columns, begy, begx));
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    if (SP == 0)
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	returnWin(0);
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    if (!dimension_limit(num_lines) || !dimension_limit(num_columns))
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	returnWin(0);
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    if ((wp = typeCalloc(WINDOWLIST, 1)) == 0)
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	returnWin(0);
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    win = &(wp->win);
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    if ((win->_line = typeCalloc(struct ldat, ((unsigned) num_lines))) == 0) {
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	free(wp);
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	returnWin(0);
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    }
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    _nc_lock_global(curses);
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    win->_curx = 0;
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    win->_cury = 0;
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    win->_maxy = num_lines - 1;
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    win->_maxx = num_columns - 1;
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    win->_begy = begy;
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    win->_begx = begx;
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    win->_yoffset = SP->_topstolen;
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    win->_flags = flags;
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    WINDOW_ATTRS(win) = A_NORMAL;
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    SetChar(win->_nc_bkgd, BLANK_TEXT, BLANK_ATTR);
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    win->_clear = is_pad ? FALSE : (num_lines == screen_lines
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				    && num_columns == screen_columns);
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    win->_idlok = FALSE;
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    win->_idcok = TRUE;
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    win->_scroll = FALSE;
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    win->_leaveok = FALSE;
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    win->_use_keypad = FALSE;
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    win->_delay = -1;
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    win->_immed = FALSE;
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    win->_sync = 0;
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    win->_parx = -1;
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    win->_pary = -1;
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    win->_parent = 0;
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    win->_regtop = 0;
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    win->_regbottom = num_lines - 1;
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    win->_pad._pad_y = -1;
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    win->_pad._pad_x = -1;
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    win->_pad._pad_top = -1;
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    win->_pad._pad_bottom = -1;
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    win->_pad._pad_left = -1;
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    win->_pad._pad_right = -1;
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    for (i = 0; i < num_lines; i++) {
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	/*
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	 * This used to do
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	 *
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	 * win->_line[i].firstchar = win->_line[i].lastchar = _NOCHANGE;
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	 *
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	 * which marks the whole window unchanged.  That's how
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	 * SVr1 curses did it, but SVr4 curses marks the whole new
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	 * window changed.
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	 *
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	 * With the old SVr1-like code, say you have stdscr full of
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	 * characters, then create a new window with newwin(),
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	 * then do a printw(win, "foo        ");, the trailing spaces are
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	 * completely ignored by the following refreshes.  So, you
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	 * get "foojunkjunk" on the screen instead of "foo        " as
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	 * you actually intended.
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	 *
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	 * SVr4 doesn't do this.  Instead the spaces are actually written.
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	 * So that's how we want ncurses to behave.
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	 */
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	win->_line[i].firstchar = 0;
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	win->_line[i].lastchar = num_columns - 1;
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	if_USE_SCROLL_HINTS(win->_line[i].oldindex = i);
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    }
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    if (!is_pad && (begx + num_columns == screen_columns)) {
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	win->_flags |= _ENDLINE;
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	if (begx == 0 && num_lines == screen_lines && begy == 0)
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	    win->_flags |= _FULLWIN;
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	if (begy + num_lines == screen_lines)
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	    win->_flags |= _SCROLLWIN;
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    }
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    wp->next = _nc_windows;
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    wp->screen = SP;
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    _nc_windows = wp;
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    T((T_CREATE("window %p"), win));
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    _nc_unlock_global(curses);
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    returnWin(win);
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}
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/*
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 * wgetch() and other functions with a WINDOW* parameter may use a SCREEN*
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 * internally, and it is useful to allow those to be invoked without switching
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 * SCREEN's, e.g., for multi-threaded applications.
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 */
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NCURSES_EXPORT(SCREEN *)
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_nc_screen_of(WINDOW *win)
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{
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    SCREEN *sp = 0;
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    if (win != 0) {
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	WINDOWLIST *wp = (WINDOWLIST *) win;
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	sp = wp->screen;
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    }
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    return (sp);
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}