GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcurses/base/wresize.c Lines: 0 83 0.0 %
Date: 2017-11-07 Branches: 0 82 0.0 %

Line Branch Exec Source
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/* $OpenBSD: wresize.c,v 1.5 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: Thomas E. Dickey 1996-2002                                      *
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 ****************************************************************************/
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#include <curses.priv.h>
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MODULE_ID("$Id: wresize.c,v 1.5 2010/01/12 23:22:06 nicm Exp $")
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static int
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cleanup_lines(struct ldat *data, int length)
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{
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    while (--length >= 0)
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	free(data[length].text);
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    free(data);
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    return ERR;
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}
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/*
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 * If we have reallocated the ldat structs, we will have to repair pointers
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 * used in subwindows.
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 */
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static void
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repair_subwindows(WINDOW *cmp)
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{
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    WINDOWLIST *wp;
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    struct ldat *pline = cmp->_line;
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    int row;
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    _nc_lock_global(curses);
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    for (each_window(wp)) {
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	WINDOW *tst = &(wp->win);
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	if (tst->_parent == cmp) {
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	    if (tst->_pary > cmp->_maxy)
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		tst->_pary = cmp->_maxy;
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	    if (tst->_parx > cmp->_maxx)
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		tst->_parx = cmp->_maxx;
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	    if (tst->_maxy + tst->_pary > cmp->_maxy)
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		tst->_maxy = cmp->_maxy - tst->_pary;
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	    if (tst->_maxx + tst->_parx > cmp->_maxx)
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		tst->_maxx = cmp->_maxx - tst->_parx;
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	    for (row = 0; row <= tst->_maxy; ++row) {
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		tst->_line[row].text = &pline[tst->_pary + row].text[tst->_parx];
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	    }
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	    repair_subwindows(tst);
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	}
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    }
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    _nc_unlock_global(curses);
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}
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/*
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 * Reallocate a curses WINDOW struct to either shrink or grow to the specified
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 * new lines/columns.  If it grows, the new character cells are filled with
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 * blanks.  The application is responsible for repainting the blank area.
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 */
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NCURSES_EXPORT(int)
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wresize(WINDOW *win, int ToLines, int ToCols)
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{
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    int col, row, size_x, size_y;
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    struct ldat *pline;
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    struct ldat *new_lines = 0;
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#ifdef TRACE
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    T((T_CALLED("wresize(%p,%d,%d)"), win, ToLines, ToCols));
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    if (win) {
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	TR(TRACE_UPDATE, ("...beg (%ld, %ld), max(%ld,%ld), reg(%ld,%ld)",
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			  (long) win->_begy, (long) win->_begx,
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			  (long) win->_maxy, (long) win->_maxx,
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			  (long) win->_regtop, (long) win->_regbottom));
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	if (USE_TRACEF(TRACE_UPDATE)) {
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	    _tracedump("...before", win);
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	    _nc_unlock_global(tracef);
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	}
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    }
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#endif
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    if (!win || --ToLines < 0 || --ToCols < 0)
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	returnCode(ERR);
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    size_x = win->_maxx;
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    size_y = win->_maxy;
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    if (ToLines == size_y
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	&& ToCols == size_x)
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	returnCode(OK);
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    if ((win->_flags & _SUBWIN)) {
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	/*
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	 * Check if the new limits will fit into the parent window's size.  If
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	 * not, do not resize.  We could adjust the location of the subwindow,
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	 * but the application may not like that.
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	 */
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	if (win->_pary + ToLines > win->_parent->_maxy
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	    || win->_parx + ToCols > win->_parent->_maxx) {
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	    returnCode(ERR);
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	}
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	pline = win->_parent->_line;
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    } else {
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	pline = 0;
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    }
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    /*
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     * Allocate new memory as needed.  Do the allocations without modifying
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     * the original window, in case an allocation fails.  Always allocate
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     * (at least temporarily) the array pointing to the individual lines.
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     */
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    new_lines = typeCalloc(struct ldat, (unsigned) (ToLines + 1));
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    if (new_lines == 0)
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	returnCode(ERR);
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    /*
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     * For each line in the target, allocate or adjust pointers for the
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     * corresponding text, depending on whether this is a window or a
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     * subwindow.
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     */
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    for (row = 0; row <= ToLines; ++row) {
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	int begin = (row > size_y) ? 0 : (size_x + 1);
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	int end = ToCols;
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	NCURSES_CH_T *s;
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	if (!(win->_flags & _SUBWIN)) {
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	    if (row <= size_y) {
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		if (ToCols != size_x) {
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		    if ((s = typeMalloc(NCURSES_CH_T, ToCols + 1)) == 0)
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			returnCode(cleanup_lines(new_lines, row));
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		    for (col = 0; col <= ToCols; ++col) {
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			s[col] = (col <= size_x
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				  ? win->_line[row].text[col]
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				  : win->_nc_bkgd);
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		    }
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		} else {
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		    s = win->_line[row].text;
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		}
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	    } else {
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		if ((s = typeMalloc(NCURSES_CH_T, ToCols + 1)) == 0)
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		    returnCode(cleanup_lines(new_lines, row));
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		for (col = 0; col <= ToCols; ++col)
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		    s[col] = win->_nc_bkgd;
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	    }
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	} else {
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	    s = &pline[win->_pary + row].text[win->_parx];
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	}
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	if_USE_SCROLL_HINTS(new_lines[row].oldindex = row);
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	if (row <= size_y) {
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	    new_lines[row].firstchar = win->_line[row].firstchar;
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	    new_lines[row].lastchar = win->_line[row].lastchar;
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	}
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	if ((ToCols != size_x) || (row > size_y)) {
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	    if (end >= begin) {	/* growing */
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		if (new_lines[row].firstchar < begin)
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		    new_lines[row].firstchar = begin;
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	    } else {		/* shrinking */
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		new_lines[row].firstchar = 0;
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	    }
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	    new_lines[row].lastchar = ToCols;
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	}
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	new_lines[row].text = s;
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    }
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    /*
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     * Dispose of unwanted memory.
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     */
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    if (!(win->_flags & _SUBWIN)) {
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	if (ToCols == size_x) {
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	    for (row = ToLines + 1; row <= size_y; row++) {
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		free(win->_line[row].text);
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	    }
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	} else {
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	    for (row = 0; row <= size_y; row++) {
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		free(win->_line[row].text);
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	    }
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	}
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    }
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    free(win->_line);
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    win->_line = new_lines;
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    /*
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     * Finally, adjust the parameters showing screen size and cursor
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     * position:
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     */
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    win->_maxx = ToCols;
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    win->_maxy = ToLines;
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    if (win->_regtop > win->_maxy)
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	win->_regtop = win->_maxy;
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    if (win->_regbottom > win->_maxy
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	|| win->_regbottom == size_y)
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	win->_regbottom = win->_maxy;
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    if (win->_curx > win->_maxx)
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	win->_curx = win->_maxx;
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    if (win->_cury > win->_maxy)
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	win->_cury = win->_maxy;
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    /*
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     * Check for subwindows of this one, and readjust pointers to our text,
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     * if needed.
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     */
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    repair_subwindows(win);
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#ifdef TRACE
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    TR(TRACE_UPDATE, ("...beg (%ld, %ld), max(%ld,%ld), reg(%ld,%ld)",
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		      (long) win->_begy, (long) win->_begx,
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		      (long) win->_maxy, (long) win->_maxx,
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		      (long) win->_regtop, (long) win->_regbottom));
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    if (USE_TRACEF(TRACE_UPDATE)) {
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	_tracedump("...after:", win);
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	_nc_unlock_global(tracef);
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    }
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#endif
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    returnCode(OK);
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}