GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcurses/widechar/lib_get_wch.c Lines: 0 25 0.0 %
Date: 2017-11-13 Branches: 0 14 0.0 %

Line Branch Exec Source
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/* $OpenBSD: lib_get_wch.c,v 1.1 2010/09/06 17:26:17 nicm Exp $ */
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/****************************************************************************
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 * Copyright (c) 2002-2007,2008 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 2002-on                                        *
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 ****************************************************************************/
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/*
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**	lib_get_wch.c
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**
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**	The routine get_wch().
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**
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*/
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#include <curses.priv.h>
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#include <ctype.h>
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MODULE_ID("$Id: lib_get_wch.c,v 1.1 2010/09/06 17:26:17 nicm Exp $")
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#if HAVE_MBTOWC && HAVE_MBLEN
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#define reset_mbytes(state) mblen(NULL, 0), mbtowc(NULL, NULL, 0)
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#define count_mbytes(buffer,length,state) mblen(buffer,length)
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#define check_mbytes(wch,buffer,length,state) \
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	(int) mbtowc(&wch, buffer, length)
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#define state_unused
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#elif HAVE_MBRTOWC && HAVE_MBRLEN
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#define reset_mbytes(state) init_mb(state)
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#define count_mbytes(buffer,length,state) mbrlen(buffer,length,&state)
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#define check_mbytes(wch,buffer,length,state) \
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	(int) mbrtowc(&wch, buffer, length, &state)
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#else
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make an error
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#endif
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NCURSES_EXPORT(int)
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wget_wch(WINDOW *win, wint_t *result)
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{
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    SCREEN *sp;
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    int code;
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    char buffer[(MB_LEN_MAX * 9) + 1];	/* allow some redundant shifts */
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    int status;
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    size_t count = 0;
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    unsigned long value;
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    wchar_t wch;
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#ifndef state_unused
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    mbstate_t state;
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#endif
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    T((T_CALLED("wget_wch(%p)"), win));
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    /*
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     * We can get a stream of single-byte characters and KEY_xxx codes from
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     * _nc_wgetch(), while we want to return a wide character or KEY_xxx code.
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     */
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    _nc_lock_global(curses);
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    sp = _nc_screen_of(win);
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    if (sp != 0) {
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	for (;;) {
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	    T(("reading %d of %d", (int) count + 1, (int) sizeof(buffer)));
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	    code = _nc_wgetch(win, &value, TRUE EVENTLIST_2nd((_nc_eventlist
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							       *) 0));
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	    if (code == ERR) {
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		break;
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	    } else if (code == KEY_CODE_YES) {
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		/*
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		 * If we were processing an incomplete multibyte character,
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		 * return an error since we have a KEY_xxx code which
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		 * interrupts it.  For some cases, we could improve this by
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		 * writing a new version of lib_getch.c(!), but it is not clear
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		 * whether the improvement would be worth the effort.
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		 */
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		if (count != 0) {
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		    _nc_ungetch(sp, (int) value);
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		    code = ERR;
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		}
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		break;
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	    } else if (count + 1 >= sizeof(buffer)) {
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		_nc_ungetch(sp, (int) value);
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		code = ERR;
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		break;
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	    } else {
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		buffer[count++] = (char) UChar(value);
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		reset_mbytes(state);
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		status = count_mbytes(buffer, count, state);
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		if (status >= 0) {
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		    reset_mbytes(state);
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		    if (check_mbytes(wch, buffer, count, state) != status) {
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			code = ERR;	/* the two calls should match */
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			_nc_ungetch(sp, (int) value);
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		    }
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		    value = wch;
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		    break;
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		}
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	    }
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	}
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    } else {
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	code = ERR;
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    }
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    *result = value;
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    _nc_unlock_global(curses);
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    T(("result %#lo", value));
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    returnCode(code);
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}