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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcurses/base/lib_refresh.c	Lines:	0	48	0.0 %
Date:	2017-11-13	Branches:	0	84	0.0 %


/* $OpenBSD: lib_refresh.c,v 1.5 2010/01/12 23:22:06 nicm Exp $ */

/****************************************************************************
 * Copyright (c) 1998-2006,2007 Free Software Foundation, Inc.              *
 *                                                                          *
 * Permission is hereby granted, free of charge, to any person obtaining a  *
 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
 *                                                                          *
 * Except as contained in this notice, the name(s) of the above copyright   *
 * holders shall not be used in advertising or otherwise to promote the     *
 * sale, use or other dealings in this Software without prior written       *
 * authorization.                                                           *
 ****************************************************************************/

/****************************************************************************
 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
 *     and: Thomas E. Dickey                        1996-on                 *
 ****************************************************************************/

/*
 *	lib_refresh.c
 *
 *	The routines wrefresh() and wnoutrefresh().
 *
 */

#include <curses.priv.h>

MODULE_ID("$Id: lib_refresh.c,v 1.5 2010/01/12 23:22:06 nicm Exp $")

NCURSES_EXPORT(int)
wrefresh(WINDOW *win)
{
    int code;

    T((T_CALLED("wrefresh(%p)"), win));

    if (win == 0) {
	code = ERR;
    } else if (win == curscr) {
	curscr->_clear = TRUE;
	code = doupdate();
    } else if ((code = wnoutrefresh(win)) == OK) {
	if (win->_clear)
	    newscr->_clear = TRUE;
	code = doupdate();
	/*
	 * Reset the clearok() flag in case it was set for the special
	 * case in hardscroll.c (if we don't reset it here, we'll get 2
	 * refreshes because the flag is copied from stdscr to newscr).
	 * Resetting the flag shouldn't do any harm, anyway.
	 */
	win->_clear = FALSE;
    }
    returnCode(code);
}

NCURSES_EXPORT(int)
wnoutrefresh(WINDOW *win)
{
    NCURSES_SIZE_T limit_x;
    NCURSES_SIZE_T src_row, src_col;
    NCURSES_SIZE_T begx;
    NCURSES_SIZE_T begy;
    NCURSES_SIZE_T dst_row, dst_col;
#if USE_SCROLL_HINTS
    bool wide;
#endif

    T((T_CALLED("wnoutrefresh(%p)"), win));
#ifdef TRACE
    if (USE_TRACEF(TRACE_UPDATE)) {
	_tracedump("...win", win);
	_nc_unlock_global(tracef);
    }
#endif /* TRACE */

    /*
     * This function will break badly if we try to refresh a pad.
     */
    if ((win == 0)
	|| (win->_flags & _ISPAD))
	returnCode(ERR);

    /* put them here so "win == 0" won't break our code */
    begx = win->_begx;
    begy = win->_begy;

    newscr->_nc_bkgd = win->_nc_bkgd;
    WINDOW_ATTRS(newscr) = WINDOW_ATTRS(win);

    /* merge in change information from all subwindows of this window */
    wsyncdown(win);

#if USE_SCROLL_HINTS
    /*
     * For pure efficiency, we'd want to transfer scrolling information
     * from the window to newscr whenever the window is wide enough that
     * its update will dominate the cost of the update for the horizontal
     * band of newscr that it occupies.  Unfortunately, this threshold
     * tends to be complex to estimate, and in any case scrolling the
     * whole band and rewriting the parts outside win's image would look
     * really ugly.  So.  What we do is consider the window "wide" if it
     * either (a) occupies the whole width of newscr, or (b) occupies
     * all but at most one column on either vertical edge of the screen
     * (this caters to fussy people who put boxes around full-screen
     * windows).  Note that changing this formula will not break any code,
     * merely change the costs of various update cases.
     */
    wide = (begx <= 1 && win->_maxx >= (newscr->_maxx - 1));
#endif

    win->_flags &= ~_HASMOVED;

    /*
     * Microtweaking alert!  This double loop is one of the genuine
     * hot spots in the code.  Even gcc doesn't seem to do enough
     * common-subexpression chunking to make it really tense,
     * so we'll force the issue.
     */

    /* limit(dst_col) */
    limit_x = win->_maxx;
    /* limit(src_col) */
    if (limit_x > newscr->_maxx - begx)
	limit_x = newscr->_maxx - begx;

    for (src_row = 0, dst_row = begy + win->_yoffset;
	 src_row <= win->_maxy && dst_row <= newscr->_maxy;
	 src_row++, dst_row++) {
	register struct ldat *nline = &newscr->_line[dst_row];
	register struct ldat *oline = &win->_line[src_row];

	if (oline->firstchar != _NOCHANGE) {
	    int last_src = oline->lastchar;

	    if (last_src > limit_x)
		last_src = limit_x;

	    src_col = oline->firstchar;
	    dst_col = src_col + begx;

	    if_WIDEC({
		register int j;

		/*
		 * Ensure that we will copy complete multi-column characters
		 * on the left-boundary.
		 */
		if (isWidecExt(oline->text[src_col])) {
		    j = 1 + dst_col - WidecExt(oline->text[src_col]);
		    if (j < 0)
			j = 0;
		    if (dst_col > j) {
			src_col -= (dst_col - j);
			dst_col = j;
		    }
		}

		/*
		 * Ensure that we will copy complete multi-column characters
		 * on the right-boundary.
		 */
		j = last_src;
		if (WidecExt(oline->text[j])) {
		    ++j;
		    while (j <= limit_x) {
			if (isWidecBase(oline->text[j])) {
			    break;
			} else {
			    last_src = j;
			}
			++j;
		    }
		}
	    });

	    if_WIDEC({
		static cchar_t blank = BLANK;
		int last_dst = begx + ((last_src < win->_maxx)
				       ? last_src
				       : win->_maxx);
		int fix_left = dst_col;
		int fix_right = last_dst;
		register int j;

		/*
		 * Check for boundary cases where we may overwrite part of a
		 * multi-column character.  For those, wipe the remainder of
		 * the character to blanks.
		 */
		j = dst_col;
		if (isWidecExt(nline->text[j])) {
		    /*
		     * On the left, we only care about multi-column characters
		     * that extend into the changed region.
		     */
		    fix_left = 1 + j - WidecExt(nline->text[j]);
		    if (fix_left < 0)
			fix_left = 0;	/* only if cell is corrupt */
		}

		j = last_dst;
		if (WidecExt(nline->text[j]) != 0) {
		    /*
		     * On the right, any multi-column character is a problem,
		     * unless it happens to be contained in the change, and
		     * ending at the right boundary of the change.  The
		     * computation for 'fix_left' accounts for the left-side of
		     * this character.  Find the end of the character.
		     */
		    ++j;
		    while (j <= newscr->_maxx && isWidecExt(nline->text[j])) {
			fix_right = j++;
		    }
		}

		/*
		 * The analysis is simpler if we do the clearing afterwards.
		 * Do that now.
		 */
		if (fix_left < dst_col || fix_right > last_dst) {
		    for (j = fix_left; j <= fix_right; ++j) {
			nline->text[j] = blank;
			CHANGED_CELL(nline, j);
		    }
		}
	    });

	    /*
	     * Copy the changed text.
	     */
	    for (; src_col <= last_src; src_col++, dst_col++) {
		if (!CharEq(oline->text[src_col], nline->text[dst_col])) {
		    nline->text[dst_col] = oline->text[src_col];
		    CHANGED_CELL(nline, dst_col);
		}
	    }

	}
#if USE_SCROLL_HINTS
	if (wide) {
	    int oind = oline->oldindex;

	    nline->oldindex = ((oind == _NEWINDEX)
			       ? _NEWINDEX
			       : (begy + oind + win->_yoffset));
	}
#endif /* USE_SCROLL_HINTS */

	oline->firstchar = oline->lastchar = _NOCHANGE;
	if_USE_SCROLL_HINTS(oline->oldindex = src_row);
    }

    if (win->_clear) {
	win->_clear = FALSE;
	newscr->_clear = TRUE;
    }

    if (!win->_leaveok) {
	newscr->_cury = win->_cury + win->_begy + win->_yoffset;
	newscr->_curx = win->_curx + win->_begx;
    }
    newscr->_leaveok = win->_leaveok;

#ifdef TRACE
    if (USE_TRACEF(TRACE_UPDATE)) {
	_tracedump("newscr", newscr);
	_nc_unlock_global(tracef);
    }
#endif /* TRACE */
    returnCode(OK);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: lib_refresh.c,v 1.5 2010/01/12 23:22:06 nicm Exp $ */
2
3			/****************************************************************************
4			* Copyright (c) 1998-2006,2007 Free Software Foundation, Inc. *
5			* *
6			* Permission is hereby granted, free of charge, to any person obtaining a *
7			* copy of this software and associated documentation files (the *
8			* "Software"), to deal in the Software without restriction, including *
9			* without limitation the rights to use, copy, modify, merge, publish, *
10			* distribute, distribute with modifications, sublicense, and/or sell *
11			* copies of the Software, and to permit persons to whom the Software is *
12			* furnished to do so, subject to the following conditions: *
13			* *
14			* The above copyright notice and this permission notice shall be included *
15			* in all copies or substantial portions of the Software. *
16			* *
17			* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
18			* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
19			* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
20			* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
21			* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
22			* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
23			* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
24			* *
25			* Except as contained in this notice, the name(s) of the above copyright *
26			* holders shall not be used in advertising or otherwise to promote the *
27			* sale, use or other dealings in this Software without prior written *
28			* authorization. *
29			****************************************************************************/
30
31			/****************************************************************************
32			* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
33			* and: Eric S. Raymond <esr@snark.thyrsus.com> *
34			* and: Thomas E. Dickey 1996-on *
35			****************************************************************************/
36
37			/*
38			* lib_refresh.c
39			*
40			* The routines wrefresh() and wnoutrefresh().
41			*
42			*/
43
44			#include <curses.priv.h>
45
46			MODULE_ID("$Id: lib_refresh.c,v 1.5 2010/01/12 23:22:06 nicm Exp $")
47
48			NCURSES_EXPORT(int)
49			wrefresh(WINDOW *win)
50			{
51			int code;
52
53			T((T_CALLED("wrefresh(%p)"), win));
54
55			if (win == 0) {
56			code = ERR;
57			} else if (win == curscr) {
58			curscr->_clear = TRUE;
59			code = doupdate();
60			} else if ((code = wnoutrefresh(win)) == OK) {
61			if (win->_clear)
62			newscr->_clear = TRUE;
63			code = doupdate();
64			/*
65			* Reset the clearok() flag in case it was set for the special
66			* case in hardscroll.c (if we don't reset it here, we'll get 2
67			* refreshes because the flag is copied from stdscr to newscr).
68			* Resetting the flag shouldn't do any harm, anyway.
69			*/
70			win->_clear = FALSE;
71			}
72			returnCode(code);
73			}
74
75			NCURSES_EXPORT(int)
76			wnoutrefresh(WINDOW *win)
77			{
78			NCURSES_SIZE_T limit_x;
79			NCURSES_SIZE_T src_row, src_col;
80			NCURSES_SIZE_T begx;
81			NCURSES_SIZE_T begy;
82			NCURSES_SIZE_T dst_row, dst_col;
83			#if USE_SCROLL_HINTS
84			bool wide;
85			#endif
86
87			T((T_CALLED("wnoutrefresh(%p)"), win));
88			#ifdef TRACE
89			if (USE_TRACEF(TRACE_UPDATE)) {
90			_tracedump("...win", win);
91			_nc_unlock_global(tracef);
92			}
93			#endif /* TRACE */
94
95			/*
96			* This function will break badly if we try to refresh a pad.
97			*/
98			if ((win == 0)
99			\|\| (win->_flags & _ISPAD))
100			returnCode(ERR);
101
102			/* put them here so "win == 0" won't break our code */
103			begx = win->_begx;
104			begy = win->_begy;
105
106			newscr->_nc_bkgd = win->_nc_bkgd;
107			WINDOW_ATTRS(newscr) = WINDOW_ATTRS(win);
108
109			/* merge in change information from all subwindows of this window */
110			wsyncdown(win);
111
112			#if USE_SCROLL_HINTS
113			/*
114			* For pure efficiency, we'd want to transfer scrolling information
115			* from the window to newscr whenever the window is wide enough that
116			* its update will dominate the cost of the update for the horizontal
117			* band of newscr that it occupies. Unfortunately, this threshold
118			* tends to be complex to estimate, and in any case scrolling the
119			* whole band and rewriting the parts outside win's image would look
120			* really ugly. So. What we do is consider the window "wide" if it
121			* either (a) occupies the whole width of newscr, or (b) occupies
122			* all but at most one column on either vertical edge of the screen
123			* (this caters to fussy people who put boxes around full-screen
124			* windows). Note that changing this formula will not break any code,
125			* merely change the costs of various update cases.
126			*/
127			wide = (begx <= 1 && win->_maxx >= (newscr->_maxx - 1));
128			#endif
129
130			win->_flags &= ~_HASMOVED;
131
132			/*
133			* Microtweaking alert! This double loop is one of the genuine
134			* hot spots in the code. Even gcc doesn't seem to do enough
135			* common-subexpression chunking to make it really tense,
136			* so we'll force the issue.
137			*/
138
139			/* limit(dst_col) */
140			limit_x = win->_maxx;
141			/* limit(src_col) */
142			if (limit_x > newscr->_maxx - begx)
143			limit_x = newscr->_maxx - begx;
144
145			for (src_row = 0, dst_row = begy + win->_yoffset;
146			src_row <= win->_maxy && dst_row <= newscr->_maxy;
147			src_row++, dst_row++) {
148			register struct ldat *nline = &newscr->_line[dst_row];
149			register struct ldat *oline = &win->_line[src_row];
150
151			if (oline->firstchar != _NOCHANGE) {
152			int last_src = oline->lastchar;
153
154			if (last_src > limit_x)
155			last_src = limit_x;
156
157			src_col = oline->firstchar;
158			dst_col = src_col + begx;
159
160			if_WIDEC({
161			register int j;
162
163			/*
164			* Ensure that we will copy complete multi-column characters
165			* on the left-boundary.
166			*/
167			if (isWidecExt(oline->text[src_col])) {
168			j = 1 + dst_col - WidecExt(oline->text[src_col]);
169			if (j < 0)
170			j = 0;
171			if (dst_col > j) {
172			src_col -= (dst_col - j);
173			dst_col = j;
174			}
175			}
176
177			/*
178			* Ensure that we will copy complete multi-column characters
179			* on the right-boundary.
180			*/
181			j = last_src;
182			if (WidecExt(oline->text[j])) {
183			++j;
184			while (j <= limit_x) {
185			if (isWidecBase(oline->text[j])) {
186			break;
187			} else {
188			last_src = j;
189			}
190			++j;
191			}
192			}
193			});
194
195			if_WIDEC({
196			static cchar_t blank = BLANK;
197			int last_dst = begx + ((last_src < win->_maxx)
198			? last_src
199			: win->_maxx);
200			int fix_left = dst_col;
201			int fix_right = last_dst;
202			register int j;
203
204			/*
205			* Check for boundary cases where we may overwrite part of a
206			* multi-column character. For those, wipe the remainder of
207			* the character to blanks.
208			*/
209			j = dst_col;
210			if (isWidecExt(nline->text[j])) {
211			/*
212			* On the left, we only care about multi-column characters
213			* that extend into the changed region.
214			*/
215			fix_left = 1 + j - WidecExt(nline->text[j]);
216			if (fix_left < 0)
217			fix_left = 0; /* only if cell is corrupt */
218			}
219
220			j = last_dst;
221			if (WidecExt(nline->text[j]) != 0) {
222			/*
223			* On the right, any multi-column character is a problem,
224			* unless it happens to be contained in the change, and
225			* ending at the right boundary of the change. The
226			* computation for 'fix_left' accounts for the left-side of
227			* this character. Find the end of the character.
228			*/
229			++j;
230			while (j <= newscr->_maxx && isWidecExt(nline->text[j])) {
231			fix_right = j++;
232			}
233			}
234
235			/*
236			* The analysis is simpler if we do the clearing afterwards.
237			* Do that now.
238			*/
239			if (fix_left < dst_col \|\| fix_right > last_dst) {
240			for (j = fix_left; j <= fix_right; ++j) {
241			nline->text[j] = blank;
242			CHANGED_CELL(nline, j);
243			}
244			}
245			});
246
247			/*
248			* Copy the changed text.
249			*/
250			for (; src_col <= last_src; src_col++, dst_col++) {
251			if (!CharEq(oline->text[src_col], nline->text[dst_col])) {
252			nline->text[dst_col] = oline->text[src_col];
253			CHANGED_CELL(nline, dst_col);
254			}
255			}
256
257			}
258			#if USE_SCROLL_HINTS
259			if (wide) {
260			int oind = oline->oldindex;
261
262			nline->oldindex = ((oind == _NEWINDEX)
263			? _NEWINDEX
264			: (begy + oind + win->_yoffset));
265			}
266			#endif /* USE_SCROLL_HINTS */
267
268			oline->firstchar = oline->lastchar = _NOCHANGE;
269			if_USE_SCROLL_HINTS(oline->oldindex = src_row);
270			}
271
272			if (win->_clear) {
273			win->_clear = FALSE;
274			newscr->_clear = TRUE;
275			}
276
277			if (!win->_leaveok) {
278			newscr->_cury = win->_cury + win->_begy + win->_yoffset;
279			newscr->_curx = win->_curx + win->_begx;
280			}
281			newscr->_leaveok = win->_leaveok;
282
283			#ifdef TRACE
284			if (USE_TRACEF(TRACE_UPDATE)) {
285			_tracedump("newscr", newscr);
286			_nc_unlock_global(tracef);
287			}
288			#endif /* TRACE */
289			returnCode(OK);
290			}