ncurses/test/test_add_wchstr.c - nest-cam/4320010/ncurses - Git at Google

 /****************************************************************************
  * Copyright (c) 2010-2012,2014 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.                                                           *
  ****************************************************************************/
 /*
  * $Id: test_add_wchstr.c,v 1.21 2014/08/02 17:24:55 tom Exp $
  *
  * Demonstrate the waddwchstr() and wadd_wch functions.
  * Thomas Dickey - 2009/9/12
  *
  * Note: to provide inputs for *add_wch(), we use setcchar().  A quirk of the
  * X/Open definition for that function is that the string contains no
  * characters with negative width.  Any control character (such as tab) falls
  * into that category.  So it follows that *add_wch() cannot render a tab
  * character because there is no legal way to construct a cchar_t containing
  * one.  X/Open does not document this, and it would be logical to assume that
  * *addwchstr() has the same limitation, but it uses a wchar_t string directly,
  * and does not document how tabs are handled.
  */

 #include <test.priv.h>

 #if USE_WIDEC_SUPPORT

 #define WIDE_LINEDATA
 #include <linedata.h>

 #undef MvAddCh
 #undef MvAddStr
 #undef MvWAddCh
 #undef MvWAddStr

 /* definitions to make it simpler to compare with test_addstr.c */
 #define AddNStr    add_wchnstr
 #define AddStr     add_wchstr
 #define MvAddNStr  (void) mvadd_wchnstr
 #define MvAddStr   (void) mvadd_wchstr
 #define MvWAddNStr (void) mvwadd_wchnstr
 #define MvWAddStr  (void) mvwadd_wchstr
 #define WAddNStr   wadd_wchnstr
 #define WAddStr    wadd_wchstr

 #define MY_TABSIZE 8

 typedef enum {
     oDefault = 0,
     oMove = 1,
     oWindow = 2,
     oMoveWindow = 3
 } Options;

 static bool m_opt = FALSE;
 static bool pass_ctls = FALSE;
 static bool w_opt = FALSE;
 static int n_opt = -1;

 static cchar_t *temp_buffer;
 static size_t temp_length;

 #define TempBuffer(source_len, source_cast) \
     if (source != 0) { \
 	const char *temp; \
 	size_t need = source_len + 1; \
 	wchar_t have[2]; \
 	int n = 0; \
  \
 	if (need > temp_length) { \
 	    temp_length = need * 2; \
 	    temp_buffer = typeRealloc(cchar_t, temp_length, temp_buffer); \
 	    if (!temp_buffer) \
 		failed("TempBuffer"); \
 	} \
 	have[0] = 0; \
 	have[1] = 0; \
 	do { \
 	    have[0] = source_cast; \
 	    if (!pass_ctls \
 	     && have[0] != 0 \
 	     && have[0] < 256 \
 	     && (temp = unctrl((chtype) have[0])) != 0 \
 	     && strlen(temp) > 1) { \
 		while (*temp != '\0') { \
 		    have[0] = (wchar_t) *temp++; \
 		    setcchar(&temp_buffer[n++], have, A_NORMAL, 0, NULL); \
 		} \
 	    } else { \
 		setcchar(&temp_buffer[n++], have, A_NORMAL, 0, NULL); \
 	    } \
 	} while (have[0] != 0); \
     } else if (temp_buffer != 0) { \
 	free(temp_buffer); \
 	temp_buffer = 0; \
 	temp_length = 0; \
     } \
     return temp_buffer;

 static size_t
 ChWLen(const wchar_t *source)
 {
     size_t result = wcslen(source);

     if (!pass_ctls) {
 	size_t adjust = 0;
 	size_t n;
 	const char *s;

 	for (n = 0; n < result; ++n) {
 	    if (source[n] < 256 && (s = unctrl((chtype) source[n])) != 0) {
 		adjust += (strlen(s) - 1);
 	    }
 	}
 	result += adjust;
     }
     return result;
 }

 static cchar_t *
 ChStr(const char *source)
 {
     TempBuffer(strlen(source), UChar(*source++));
 }

 static cchar_t *
 ChWStr(const wchar_t *source)
 {
     TempBuffer(ChWLen(source), *source++);
 }

 static void
 legend(WINDOW *win, int level, Options state, wchar_t *buffer, int length)
 {
     const char *showstate;

     switch (state) {
     default:
     case oDefault:
 	showstate = "";
 	break;
     case oMove:
 	showstate = " (mvXXX)";
 	break;
     case oWindow:
 	showstate = " (winXXX)";
 	break;
     case oMoveWindow:
 	showstate = " (mvwinXXX)";
 	break;
     }

     wmove(win, 0, 0);
     wprintw(win,
 	    "The Strings/Chars displays should match.  Enter any characters, except:\n");
     wprintw(win,
 	    "down-arrow or ^N to repeat on next line, ^W for inner window, ESC to exit.\n");
     wclrtoeol(win);
     wprintw(win, "Level %d,%s added %d characters <", level,
 	    showstate, length);
     waddwstr(win, buffer);
     waddstr(win, ">");
 }

 static int
 ColOf(wchar_t *buffer, int length, int margin)
 {
     int n;
     int result;

     for (n = 0, result = margin + 1; n < length; ++n) {
 	int ch = buffer[n];
 	switch (ch) {
 	case '\n':
 	    /* actually newline should clear the remainder of the line
 	     * and move to the next line - but that seems a little awkward
 	     * in this example.
 	     */
 	case '\r':
 	    result = 0;
 	    break;
 	case '\b':
 	    if (result > 0)
 		--result;
 	    break;
 	case '\t':
 	    result += (MY_TABSIZE - (result % MY_TABSIZE));
 	    break;
 	case '\177':
 	    result += 2;
 	    break;
 	default:
 	    result += wcwidth((wchar_t) ch);
 	    if (ch < 32)
 		++result;
 	    break;
 	}
     }
     return result;
 }

 static int
 ConvertCh(chtype source, cchar_t *target)
 {
     wchar_t tmp_wchar[2];

     tmp_wchar[0] = (wchar_t) source;
     tmp_wchar[1] = 0;
     if (setcchar(target, tmp_wchar, A_NORMAL, 0, (void *) 0) == ERR) {
 	beep();
 	return FALSE;
     }
     return TRUE;
 }

 static int
 MvWAddCh(WINDOW *win, int y, int x, chtype ch)
 {
     int code;
     cchar_t tmp_cchar;

     if (ConvertCh(ch, &tmp_cchar)) {
 	code = mvwadd_wch(win, y, x, &tmp_cchar);
     } else {
 	code = mvwaddch(win, y, x, ch);
     }
     return code;
 }

 static int
 MvAddCh(int y, int x, chtype ch)
 {
     int code;
     cchar_t tmp_cchar;

     if (ConvertCh(ch, &tmp_cchar)) {
 	code = mvadd_wch(y, x, &tmp_cchar);
     } else {
 	code = mvaddch(y, x, ch);
     }
     return code;
 }

 static int
 WAddCh(WINDOW *win, chtype ch)
 {
     int code;
     cchar_t tmp_cchar;

     if (ConvertCh(ch, &tmp_cchar)) {
 	code = wadd_wch(win, &tmp_cchar);
     } else {
 	code = waddch(win, ch);
     }
     return code;
 }

 static int
 AddCh(chtype ch)
 {
     int code;
     cchar_t tmp_cchar;

     if (ConvertCh(ch, &tmp_cchar)) {
 	code = add_wch(&tmp_cchar);
     } else {
 	code = addch(ch);
     }
     return code;
 }

 #define LEN(n) ((length - (n) > n_opt) ? n_opt : (length - (n)))
 static void
 test_add_wchstr(int level)
 {
     static bool first = TRUE;

     int ch;
     int limit;
     int row = 1;
     int col;
     int row2, col2;
     int length;
     wchar_t buffer[BUFSIZ];
     WINDOW *look = 0;
     WINDOW *work = 0;
     WINDOW *show = 0;
     int margin = (2 * MY_TABSIZE) - 1;
     Options option = ((m_opt ? oMove : oDefault)
 		      | ((w_opt || (level > 0)) ? oWindow : oDefault));

     if (first) {
 	static char cmd[80];
 	setlocale(LC_ALL, "");

 	putenv(strcpy(cmd, "TABSIZE=8"));

 	initscr();
 	(void) cbreak();	/* take input chars one at a time, no wait for \n */
 	(void) noecho();	/* don't echo input */
 	keypad(stdscr, TRUE);

 	/*
 	 * Show the characters added in color, to distinguish from those that
 	 * are shifted.
 	 */
 	if (has_colors()) {
 	    start_color();
 	    init_pair(1, COLOR_WHITE, COLOR_BLUE);
 	}
     }

     limit = LINES - 5;
     if (level > 0) {
 	look = newwin(limit, COLS - (2 * (level - 1)), 0, level - 1);
 	work = newwin(limit - 2, COLS - (2 * level), 1, level);
 	show = newwin(4, COLS, limit + 1, 0);
 	box(look, 0, 0);
 	wnoutrefresh(look);
 	limit -= 2;
     } else {
 	work = stdscr;
 	show = derwin(stdscr, 4, COLS, limit + 1, 0);
     }
     keypad(work, TRUE);

     for (col = margin + 1; col < COLS; col += MY_TABSIZE)
 	MvWVLine(work, row, col, '.', limit - 2);

     MvWVLine(work, row, margin, ACS_VLINE, limit - 2);
     MvWVLine(work, row, margin + 1, ACS_VLINE, limit - 2);
     limit /= 2;

     (void) mvwadd_wchstr(work, 1, 2, ChStr("String"));
     (void) mvwadd_wchstr(work, limit + 1, 2, ChStr("Chars"));
     wnoutrefresh(work);

     buffer[length = 0] = '\0';
     legend(show, level, option, buffer, length);
     wnoutrefresh(show);

     doupdate();

     if (has_colors()) {
 	wbkgdset(work, (chtype) (COLOR_PAIR(1) | ' '));
     }

     while ((ch = read_linedata(work)) != ERR && !isQUIT(ch)) {
 	wmove(work, row, margin + 1);
 	switch (ch) {
 	case key_RECUR:
 	    test_add_wchstr(level + 1);

 	    if (look)
 		touchwin(look);
 	    touchwin(work);
 	    touchwin(show);

 	    if (look)
 		wnoutrefresh(look);
 	    wnoutrefresh(work);
 	    wnoutrefresh(show);

 	    doupdate();
 	    break;
 	case key_NEWLINE:
 	    if (row < limit) {
 		++row;
 		/* put the whole string in, all at once */
 		col2 = margin + 1;
 		switch (option) {
 		case oDefault:
 		    if (n_opt > 1) {
 			for (col = 0; col < length; col += n_opt) {
 			    col2 = ColOf(buffer, col, margin);
 			    if (move(row, col2) != ERR) {
 				AddNStr(ChWStr(buffer + col), LEN(col));
 			    }
 			}
 		    } else {
 			if (move(row, col2) != ERR) {
 			    AddStr(ChWStr(buffer));
 			}
 		    }
 		    break;
 		case oMove:
 		    if (n_opt > 1) {
 			for (col = 0; col < length; col += n_opt) {
 			    col2 = ColOf(buffer, col, margin);
 			    MvAddNStr(row, col2, ChWStr(buffer + col), LEN(col));
 			}
 		    } else {
 			MvAddStr(row, col2, ChWStr(buffer));
 		    }
 		    break;
 		case oWindow:
 		    if (n_opt > 1) {
 			for (col = 0; col < length; col += n_opt) {
 			    col2 = ColOf(buffer, col, margin);
 			    if (wmove(work, row, col2) != ERR) {
 				WAddNStr(work, ChWStr(buffer + col), LEN(col));
 			    }
 			}
 		    } else {
 			if (wmove(work, row, col2) != ERR) {
 			    WAddStr(work, ChWStr(buffer));
 			}
 		    }
 		    break;
 		case oMoveWindow:
 		    if (n_opt > 1) {
 			for (col = 0; col < length; col += n_opt) {
 			    col2 = ColOf(buffer, col, margin);
 			    MvWAddNStr(work, row, col2, ChWStr(buffer +
 							       col), LEN(col));
 			}
 		    } else {
 			MvWAddStr(work, row, col2, ChWStr(buffer));
 		    }
 		    break;
 		}

 		/* do the corresponding single-character add */
 		row2 = limit + row;
 		for (col = 0; col < length; ++col) {
 		    col2 = ColOf(buffer, col, margin);
 		    switch (option) {
 		    case oDefault:
 			if (move(row2, col2) != ERR) {
 			    AddCh((chtype) buffer[col]);
 			}
 			break;
 		    case oMove:
 			MvAddCh(row2, col2, (chtype) buffer[col]);
 			break;
 		    case oWindow:
 			if (wmove(work, row2, col2) != ERR) {
 			    WAddCh(work, (chtype) buffer[col]);
 			}
 			break;
 		    case oMoveWindow:
 			MvWAddCh(work, row2, col2, (chtype) buffer[col]);
 			break;
 		    }
 		}
 	    } else {
 		beep();
 	    }
 	    break;
 	default:
 	    buffer[length++] = (wchar_t) ch;
 	    buffer[length] = '\0';

 	    /* put the string in, one character at a time */
 	    col = ColOf(buffer, length - 1, margin);
 	    switch (option) {
 	    case oDefault:
 		if (move(row, col) != ERR) {
 		    AddStr(ChWStr(buffer + length - 1));
 		}
 		break;
 	    case oMove:
 		MvAddStr(row, col, ChWStr(buffer + length - 1));
 		break;
 	    case oWindow:
 		if (wmove(work, row, col) != ERR) {
 		    WAddStr(work, ChWStr(buffer + length - 1));
 		}
 		break;
 	    case oMoveWindow:
 		MvWAddStr(work, row, col, ChWStr(buffer + length - 1));
 		break;
 	    }

 	    /* do the corresponding single-character add */
 	    switch (option) {
 	    case oDefault:
 		if (move(limit + row, col) != ERR) {
 		    AddCh((chtype) ch);
 		}
 		break;
 	    case oMove:
 		MvAddCh(limit + row, col, (chtype) ch);
 		break;
 	    case oWindow:
 		if (wmove(work, limit + row, col) != ERR) {
 		    WAddCh(work, (chtype) ch);
 		}
 		break;
 	    case oMoveWindow:
 		MvWAddCh(work, limit + row, col, (chtype) ch);
 		break;
 	    }

 	    wnoutrefresh(work);

 	    legend(show, level, option, buffer, length);
 	    wnoutrefresh(show);

 	    doupdate();
 	    break;
 	}
     }
     delwin(show);
     if (level > 0) {
 	delwin(work);
 	delwin(look);
     }
 }

 static void
 usage(void)
 {
     static const char *tbl[] =
     {
 	"Usage: test_add_wchstr [options]"
 	,""
 	,"Options:"
 	,"  -f FILE read data from given file"
 	,"  -n NUM  limit string-adds to NUM bytes on ^N replay"
 	,"  -m      perform wmove/move separately from add-functions"
 	,"  -p      pass-thru control characters without using unctrl()"
 	,"  -w      use window-parameter even when stdscr would be implied"
     };
     unsigned n;
     for (n = 0; n < SIZEOF(tbl); ++n)
 	fprintf(stderr, "%s\n", tbl[n]);
     ExitProgram(EXIT_FAILURE);
 }

 int
 main(int argc GCC_UNUSED, char *argv[]GCC_UNUSED)
 {
     int ch;

     setlocale(LC_ALL, "");

     while ((ch = getopt(argc, argv, "f:mn:pw")) != -1) {
 	switch (ch) {
 	case 'f':
 	    init_linedata(optarg);
 	    break;
 	case 'm':
 	    m_opt = TRUE;
 	    break;
 	case 'n':
 	    n_opt = atoi(optarg);
 	    if (n_opt == 0)
 		n_opt = -1;
 	    break;
 	case 'p':
 	    pass_ctls = TRUE;
 	    break;
 	case 'w':
 	    w_opt = TRUE;
 	    break;
 	default:
 	    usage();
 	    break;
 	}
     }
     if (optind < argc)
 	usage();

     test_add_wchstr(0);
     endwin();
     ExitProgram(EXIT_SUCCESS);
 }
 #else
 int
 main(void)
 {
     printf("This program requires the wide-ncurses library\n");
     ExitProgram(EXIT_FAILURE);
 }
 #endif
	/****************************************************************************
	* Copyright (c) 2010-2012,2014 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. *
	****************************************************************************/
	/*
	* $Id: test_add_wchstr.c,v 1.21 2014/08/02 17:24:55 tom Exp $
	*
	* Demonstrate the waddwchstr() and wadd_wch functions.
	* Thomas Dickey - 2009/9/12
	*
	* Note: to provide inputs for *add_wch(), we use setcchar(). A quirk of the
	* X/Open definition for that function is that the string contains no
	* characters with negative width. Any control character (such as tab) falls
	* into that category. So it follows that *add_wch() cannot render a tab
	* character because there is no legal way to construct a cchar_t containing
	* one. X/Open does not document this, and it would be logical to assume that
	* *addwchstr() has the same limitation, but it uses a wchar_t string directly,
	* and does not document how tabs are handled.
	*/

	#include <test.priv.h>

	#if USE_WIDEC_SUPPORT

	#define WIDE_LINEDATA
	#include <linedata.h>

	#undef MvAddCh
	#undef MvAddStr
	#undef MvWAddCh
	#undef MvWAddStr

	/* definitions to make it simpler to compare with test_addstr.c */
	#define AddNStr add_wchnstr
	#define AddStr add_wchstr
	#define MvAddNStr (void) mvadd_wchnstr
	#define MvAddStr (void) mvadd_wchstr
	#define MvWAddNStr (void) mvwadd_wchnstr
	#define MvWAddStr (void) mvwadd_wchstr
	#define WAddNStr wadd_wchnstr
	#define WAddStr wadd_wchstr

	#define MY_TABSIZE 8

	typedef enum {
	oDefault = 0,
	oMove = 1,
	oWindow = 2,
	oMoveWindow = 3
	} Options;

	static bool m_opt = FALSE;
	static bool pass_ctls = FALSE;
	static bool w_opt = FALSE;
	static int n_opt = -1;

	static cchar_t *temp_buffer;
	static size_t temp_length;

	#define TempBuffer(source_len, source_cast) \
	if (source != 0) { \
	const char *temp; \
	size_t need = source_len + 1; \
	wchar_t have[2]; \
	int n = 0; \
	\
	if (need > temp_length) { \
	temp_length = need * 2; \
	temp_buffer = typeRealloc(cchar_t, temp_length, temp_buffer); \
	if (!temp_buffer) \
	failed("TempBuffer"); \
	} \
	have[0] = 0; \
	have[1] = 0; \
	do { \
	have[0] = source_cast; \
	if (!pass_ctls \
	&& have[0] != 0 \
	&& have[0] < 256 \
	&& (temp = unctrl((chtype) have[0])) != 0 \
	&& strlen(temp) > 1) { \
	while (*temp != '\0') { \
	have[0] = (wchar_t) *temp++; \
	setcchar(&temp_buffer[n++], have, A_NORMAL, 0, NULL); \
	} \
	} else { \
	setcchar(&temp_buffer[n++], have, A_NORMAL, 0, NULL); \
	} \
	} while (have[0] != 0); \
	} else if (temp_buffer != 0) { \
	free(temp_buffer); \
	temp_buffer = 0; \
	temp_length = 0; \
	} \
	return temp_buffer;

	static size_t
	ChWLen(const wchar_t *source)
	{
	size_t result = wcslen(source);

	if (!pass_ctls) {
	size_t adjust = 0;
	size_t n;
	const char *s;

	for (n = 0; n < result; ++n) {
	if (source[n] < 256 && (s = unctrl((chtype) source[n])) != 0) {
	adjust += (strlen(s) - 1);
	}
	}
	result += adjust;
	}
	return result;
	}

	static cchar_t *
	ChStr(const char *source)
	{
	TempBuffer(strlen(source), UChar(*source++));
	}

	static cchar_t *
	ChWStr(const wchar_t *source)
	{
	TempBuffer(ChWLen(source), *source++);
	}

	static void
	legend(WINDOW win, int level, Options state, wchar_t buffer, int length)
	{
	const char *showstate;

	switch (state) {
	default:
	case oDefault:
	showstate = "";
	break;
	case oMove:
	showstate = " (mvXXX)";
	break;
	case oWindow:
	showstate = " (winXXX)";
	break;
	case oMoveWindow:
	showstate = " (mvwinXXX)";
	break;
	}

	wmove(win, 0, 0);
	wprintw(win,
	"The Strings/Chars displays should match. Enter any characters, except:\n");
	wprintw(win,
	"down-arrow or ^N to repeat on next line, ^W for inner window, ESC to exit.\n");
	wclrtoeol(win);
	wprintw(win, "Level %d,%s added %d characters <", level,
	showstate, length);
	waddwstr(win, buffer);
	waddstr(win, ">");
	}

	static int
	ColOf(wchar_t *buffer, int length, int margin)
	{
	int n;
	int result;

	for (n = 0, result = margin + 1; n < length; ++n) {
	int ch = buffer[n];
	switch (ch) {
	case '\n':
	/* actually newline should clear the remainder of the line
	* and move to the next line - but that seems a little awkward
	* in this example.
	*/
	case '\r':
	result = 0;
	break;
	case '\b':
	if (result > 0)
	--result;
	break;
	case '\t':
	result += (MY_TABSIZE - (result % MY_TABSIZE));
	break;
	case '\177':
	result += 2;
	break;
	default:
	result += wcwidth((wchar_t) ch);
	if (ch < 32)
	++result;
	break;
	}
	}
	return result;
	}

	static int
	ConvertCh(chtype source, cchar_t *target)
	{
	wchar_t tmp_wchar[2];

	tmp_wchar[0] = (wchar_t) source;
	tmp_wchar[1] = 0;
	if (setcchar(target, tmp_wchar, A_NORMAL, 0, (void *) 0) == ERR) {
	beep();
	return FALSE;
	}
	return TRUE;
	}

	static int
	MvWAddCh(WINDOW *win, int y, int x, chtype ch)
	{
	int code;
	cchar_t tmp_cchar;

	if (ConvertCh(ch, &tmp_cchar)) {
	code = mvwadd_wch(win, y, x, &tmp_cchar);
	} else {
	code = mvwaddch(win, y, x, ch);
	}
	return code;
	}

	static int
	MvAddCh(int y, int x, chtype ch)
	{
	int code;
	cchar_t tmp_cchar;

	if (ConvertCh(ch, &tmp_cchar)) {
	code = mvadd_wch(y, x, &tmp_cchar);
	} else {
	code = mvaddch(y, x, ch);
	}
	return code;
	}

	static int
	WAddCh(WINDOW *win, chtype ch)
	{
	int code;
	cchar_t tmp_cchar;

	if (ConvertCh(ch, &tmp_cchar)) {
	code = wadd_wch(win, &tmp_cchar);
	} else {
	code = waddch(win, ch);
	}
	return code;
	}

	static int
	AddCh(chtype ch)
	{
	int code;
	cchar_t tmp_cchar;

	if (ConvertCh(ch, &tmp_cchar)) {
	code = add_wch(&tmp_cchar);
	} else {
	code = addch(ch);
	}
	return code;
	}

	#define LEN(n) ((length - (n) > n_opt) ? n_opt : (length - (n)))
	static void
	test_add_wchstr(int level)
	{
	static bool first = TRUE;

	int ch;
	int limit;
	int row = 1;
	int col;
	int row2, col2;
	int length;
	wchar_t buffer[BUFSIZ];
	WINDOW *look = 0;
	WINDOW *work = 0;
	WINDOW *show = 0;
	int margin = (2 * MY_TABSIZE) - 1;
	Options option = ((m_opt ? oMove : oDefault)
	\| ((w_opt \|\| (level > 0)) ? oWindow : oDefault));

	if (first) {
	static char cmd[80];
	setlocale(LC_ALL, "");

	putenv(strcpy(cmd, "TABSIZE=8"));

	initscr();
	(void) cbreak(); /* take input chars one at a time, no wait for \n */
	(void) noecho(); /* don't echo input */
	keypad(stdscr, TRUE);

	/*
	* Show the characters added in color, to distinguish from those that
	* are shifted.
	*/
	if (has_colors()) {
	start_color();
	init_pair(1, COLOR_WHITE, COLOR_BLUE);
	}
	}

	limit = LINES - 5;
	if (level > 0) {
	look = newwin(limit, COLS - (2 * (level - 1)), 0, level - 1);
	work = newwin(limit - 2, COLS - (2 * level), 1, level);
	show = newwin(4, COLS, limit + 1, 0);
	box(look, 0, 0);
	wnoutrefresh(look);
	limit -= 2;
	} else {
	work = stdscr;
	show = derwin(stdscr, 4, COLS, limit + 1, 0);
	}
	keypad(work, TRUE);

	for (col = margin + 1; col < COLS; col += MY_TABSIZE)
	MvWVLine(work, row, col, '.', limit - 2);

	MvWVLine(work, row, margin, ACS_VLINE, limit - 2);
	MvWVLine(work, row, margin + 1, ACS_VLINE, limit - 2);
	limit /= 2;

	(void) mvwadd_wchstr(work, 1, 2, ChStr("String"));
	(void) mvwadd_wchstr(work, limit + 1, 2, ChStr("Chars"));
	wnoutrefresh(work);

	buffer[length = 0] = '\0';
	legend(show, level, option, buffer, length);
	wnoutrefresh(show);

	doupdate();

	if (has_colors()) {
	wbkgdset(work, (chtype) (COLOR_PAIR(1) \| ' '));
	}

	while ((ch = read_linedata(work)) != ERR && !isQUIT(ch)) {
	wmove(work, row, margin + 1);
	switch (ch) {
	case key_RECUR:
	test_add_wchstr(level + 1);

	if (look)
	touchwin(look);
	touchwin(work);
	touchwin(show);

	if (look)
	wnoutrefresh(look);
	wnoutrefresh(work);
	wnoutrefresh(show);

	doupdate();
	break;
	case key_NEWLINE:
	if (row < limit) {
	++row;
	/* put the whole string in, all at once */
	col2 = margin + 1;
	switch (option) {
	case oDefault:
	if (n_opt > 1) {
	for (col = 0; col < length; col += n_opt) {
	col2 = ColOf(buffer, col, margin);
	if (move(row, col2) != ERR) {
	AddNStr(ChWStr(buffer + col), LEN(col));
	}
	}
	} else {
	if (move(row, col2) != ERR) {
	AddStr(ChWStr(buffer));
	}
	}
	break;
	case oMove:
	if (n_opt > 1) {
	for (col = 0; col < length; col += n_opt) {
	col2 = ColOf(buffer, col, margin);
	MvAddNStr(row, col2, ChWStr(buffer + col), LEN(col));
	}
	} else {
	MvAddStr(row, col2, ChWStr(buffer));
	}
	break;
	case oWindow:
	if (n_opt > 1) {
	for (col = 0; col < length; col += n_opt) {
	col2 = ColOf(buffer, col, margin);
	if (wmove(work, row, col2) != ERR) {
	WAddNStr(work, ChWStr(buffer + col), LEN(col));
	}
	}
	} else {
	if (wmove(work, row, col2) != ERR) {
	WAddStr(work, ChWStr(buffer));
	}
	}
	break;
	case oMoveWindow:
	if (n_opt > 1) {
	for (col = 0; col < length; col += n_opt) {
	col2 = ColOf(buffer, col, margin);
	MvWAddNStr(work, row, col2, ChWStr(buffer +
	col), LEN(col));
	}
	} else {
	MvWAddStr(work, row, col2, ChWStr(buffer));
	}
	break;
	}

	/* do the corresponding single-character add */
	row2 = limit + row;
	for (col = 0; col < length; ++col) {
	col2 = ColOf(buffer, col, margin);
	switch (option) {
	case oDefault:
	if (move(row2, col2) != ERR) {
	AddCh((chtype) buffer[col]);
	}
	break;
	case oMove:
	MvAddCh(row2, col2, (chtype) buffer[col]);
	break;
	case oWindow:
	if (wmove(work, row2, col2) != ERR) {
	WAddCh(work, (chtype) buffer[col]);
	}
	break;
	case oMoveWindow:
	MvWAddCh(work, row2, col2, (chtype) buffer[col]);
	break;
	}
	}
	} else {
	beep();
	}
	break;
	default:
	buffer[length++] = (wchar_t) ch;
	buffer[length] = '\0';

	/* put the string in, one character at a time */
	col = ColOf(buffer, length - 1, margin);
	switch (option) {
	case oDefault:
	if (move(row, col) != ERR) {
	AddStr(ChWStr(buffer + length - 1));
	}
	break;
	case oMove:
	MvAddStr(row, col, ChWStr(buffer + length - 1));
	break;
	case oWindow:
	if (wmove(work, row, col) != ERR) {
	WAddStr(work, ChWStr(buffer + length - 1));
	}
	break;
	case oMoveWindow:
	MvWAddStr(work, row, col, ChWStr(buffer + length - 1));
	break;
	}

	/* do the corresponding single-character add */
	switch (option) {
	case oDefault:
	if (move(limit + row, col) != ERR) {
	AddCh((chtype) ch);
	}
	break;
	case oMove:
	MvAddCh(limit + row, col, (chtype) ch);
	break;
	case oWindow:
	if (wmove(work, limit + row, col) != ERR) {
	WAddCh(work, (chtype) ch);
	}
	break;
	case oMoveWindow:
	MvWAddCh(work, limit + row, col, (chtype) ch);
	break;
	}

	wnoutrefresh(work);

	legend(show, level, option, buffer, length);
	wnoutrefresh(show);

	doupdate();
	break;
	}
	}
	delwin(show);
	if (level > 0) {
	delwin(work);
	delwin(look);
	}
	}

	static void
	usage(void)
	{
	static const char *tbl[] =
	{
	"Usage: test_add_wchstr [options]"
	,""
	,"Options:"
	," -f FILE read data from given file"
	," -n NUM limit string-adds to NUM bytes on ^N replay"
	," -m perform wmove/move separately from add-functions"
	," -p pass-thru control characters without using unctrl()"
	," -w use window-parameter even when stdscr would be implied"
	};
	unsigned n;
	for (n = 0; n < SIZEOF(tbl); ++n)
	fprintf(stderr, "%s\n", tbl[n]);
	ExitProgram(EXIT_FAILURE);
	}

	int
	main(int argc GCC_UNUSED, char *argv[]GCC_UNUSED)
	{
	int ch;

	setlocale(LC_ALL, "");

	while ((ch = getopt(argc, argv, "f:mn:pw")) != -1) {
	switch (ch) {
	case 'f':
	init_linedata(optarg);
	break;
	case 'm':
	m_opt = TRUE;
	break;
	case 'n':
	n_opt = atoi(optarg);
	if (n_opt == 0)
	n_opt = -1;
	break;
	case 'p':
	pass_ctls = TRUE;
	break;
	case 'w':
	w_opt = TRUE;
	break;
	default:
	usage();
	break;
	}
	}
	if (optind < argc)
	usage();

	test_add_wchstr(0);
	endwin();
	ExitProgram(EXIT_SUCCESS);
	}
	#else
	int
	main(void)
	{
	printf("This program requires the wide-ncurses library\n");
	ExitProgram(EXIT_FAILURE);
	}
	#endif