ncurses-5.7/test/ncurses.c

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/****************************************************************************

NAME
   ncurses.c --- ncurses library exerciser

SYNOPSIS
   ncurses

DESCRIPTION
   An interactive test module for the ncurses library.

AUTHOR
   Author: Eric S. Raymond <esr@snark.thyrsus.com> 1993
           Thomas E. Dickey (beginning revision 1.27 in 1996).

$Id: ncurses.c,v 1.329 2008/09/27 14:34:58 tom Exp $

***************************************************************************/

#include <test.priv.h>

#ifdef __hpux
#undef mvwdelch			/* HPUX 11.23 macro will not compile */
#endif

#if HAVE_GETTIMEOFDAY
#if HAVE_SYS_TIME_H && HAVE_SYS_TIME_SELECT
#include <sys/time.h>
#endif
#if HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#endif

#if USE_LIBPANEL
#include <panel.h>
#endif

#if USE_LIBMENU
#include <menu.h>
#endif

#if USE_LIBFORM
#include <form.h>
#endif

#ifdef NCURSES_VERSION

#define NCURSES_CONST_PARAM const void

#ifdef TRACE
static unsigned save_trace = TRACE_ORDINARY | TRACE_ICALLS | TRACE_CALLS;
extern unsigned _nc_tracing;
#endif

#else

#define NCURSES_CONST_PARAM char

#define mmask_t chtype		/* not specified in XSI */

#ifndef ACS_S3
#ifdef CURSES_ACS_ARRAY
#define ACS_S3          (CURSES_ACS_ARRAY['p'])		/* scan line 3 */
#define ACS_S7          (CURSES_ACS_ARRAY['r'])		/* scan line 7 */
#define ACS_LEQUAL      (CURSES_ACS_ARRAY['y'])		/* less/equal */
#define ACS_GEQUAL      (CURSES_ACS_ARRAY['z'])		/* greater/equal */
#define ACS_PI          (CURSES_ACS_ARRAY['{'])		/* Pi */
#define ACS_NEQUAL      (CURSES_ACS_ARRAY['|'])		/* not equal */
#define ACS_STERLING    (CURSES_ACS_ARRAY['}'])		/* UK pound sign */
#else
#define ACS_S3          (A_ALTCHARSET + 'p')	/* scan line 3 */
#define ACS_S7          (A_ALTCHARSET + 'r')	/* scan line 7 */
#define ACS_LEQUAL      (A_ALTCHARSET + 'y')	/* less/equal */
#define ACS_GEQUAL      (A_ALTCHARSET + 'z')	/* greater/equal */
#define ACS_PI          (A_ALTCHARSET + '{')	/* Pi */
#define ACS_NEQUAL      (A_ALTCHARSET + '|')	/* not equal */
#define ACS_STERLING    (A_ALTCHARSET + '}')	/* UK pound sign */
#endif
#endif /* ACS_S3 */

#ifdef CURSES_WACS_ARRAY
#define WACS_S3         (&(CURSES_WACS_ARRAY['p']))	/* scan line 3 */
#define WACS_S7         (&(CURSES_WACS_ARRAY['r']))	/* scan line 7 */
#define WACS_LEQUAL     (&(CURSES_WACS_ARRAY['y']))	/* less/equal */
#define WACS_GEQUAL     (&(CURSES_WACS_ARRAY['z']))	/* greater/equal */
#define WACS_PI         (&(CURSES_WACS_ARRAY['{']))	/* Pi */
#define WACS_NEQUAL     (&(CURSES_WACS_ARRAY['|']))	/* not equal */
#define WACS_STERLING   (&(CURSES_WACS_ARRAY['}']))	/* UK pound sign */
#endif

#endif

#if HAVE_WCSRTOMBS
#define count_wchars(src, len, state)      wcsrtombs(0,   &src, len, state)
#define trans_wchars(dst, src, len, state) wcsrtombs(dst, &src, len, state)
#define reset_wchars(state) memset(&state, 0, sizeof(state))
#elif HAVE_WCSTOMBS && HAVE_MBTOWC && HAVE_MBLEN
#define count_wchars(src, len, state)      wcstombs(0,   src, len)
#define trans_wchars(dst, src, len, state) wcstombs(dst, src, len)
#define reset_wchars(state) mblen(NULL, 0), mbtowc(NULL, NULL, 0)
#define state_unused
#endif

#if HAVE_MBSRTOWCS
#define count_mbytes(src, len, state)      mbsrtowcs(0,   &src, len, state)
#define trans_mbytes(dst, src, len, state) mbsrtowcs(dst, &src, len, state)
#define reset_mbytes(state) memset(&state, 0, sizeof(state))
#elif HAVE_MBSTOWCS && HAVE_MBTOWC && HAVE_MBLEN
#define count_mbytes(src, len, state)      mbstowcs(0,   src, len)
#define trans_mbytes(dst, src, len, state) mbstowcs(dst, src, len)
#define reset_mbytes(state) mblen(NULL, 0), mbtowc(NULL, NULL, 0)
#define state_unused
#endif

#define ToggleAcs(temp,real) temp = ((temp == real) ? 0 : real)

#define P(string)	printw("%s\n", string)

#define BLANK		' '	/* this is the background character */

#undef max_colors
static int max_colors;		/* the actual number of colors we'll use */
static int min_colors;		/* the minimum color code */
static bool use_colors;		/* true if we use colors */

#undef max_pairs
static int max_pairs;		/* ...and the number of color pairs */

typedef struct {
    short red;
    short green;
    short blue;
} RGB_DATA;

static RGB_DATA *all_colors;

static void main_menu(bool);

/* The behavior of mvhline, mvvline for negative/zero length is unspecified,
 * though we can rely on negative x/y values to stop the macro.
 */
static void
do_h_line(int y, int x, chtype c, int to)
{
    if ((to) > (x))
	mvhline(y, x, c, (to) - (x));
}

static void
do_v_line(int y, int x, chtype c, int to)
{
    if ((to) > (y))
	mvvline(y, x, c, (to) - (y));
}

static void
Repaint(void)
{
    touchwin(stdscr);
    touchwin(curscr);
    wrefresh(curscr);
}

static bool
isQuit(int c)
{
    return ((c) == QUIT || (c) == ESCAPE);
}
#define case_QUIT	QUIT: case ESCAPE

/* Common function to allow ^T to toggle trace-mode in the middle of a test
 * so that trace-files can be made smaller.
 */
static int
wGetchar(WINDOW *win)
{
    int c;
#ifdef TRACE
    while ((c = wgetch(win)) == CTRL('T')) {
	if (_nc_tracing) {
	    save_trace = _nc_tracing;
	    Trace(("TOGGLE-TRACING OFF"));
	    _nc_tracing = 0;
	} else {
	    _nc_tracing = save_trace;
	}
	trace(_nc_tracing);
	if (_nc_tracing)
	    Trace(("TOGGLE-TRACING ON"));
    }
#else
    c = wgetch(win);
#endif
    return c;
}
#define Getchar() wGetchar(stdscr)

/* replaces wgetnstr(), since we want to be able to edit values */
static void
wGetstring(WINDOW *win, char *buffer, int limit)
{
    int y0, x0, x, ch;
    bool done = FALSE;

    echo();
    getyx(win, y0, x0);
    wattrset(win, A_REVERSE);

    x = (int) strlen(buffer);
    while (!done) {
	if (x > (int) strlen(buffer))
	    x = (int) strlen(buffer);
	wmove(win, y0, x0);
	wprintw(win, "%-*s", limit, buffer);
	wmove(win, y0, x0 + x);
	switch (ch = wGetchar(win)) {
	case '\n':
	case KEY_ENTER:
	    done = TRUE;
	    break;
	case CTRL('U'):
	    *buffer = '\0';
	    break;
	case '\b':
	case KEY_BACKSPACE:
	case KEY_DC:
	    if (x > 0) {
		int j;
		for (j = --x; (buffer[j] = buffer[j + 1]) != '\0'; ++j) {
		    ;
		}
	    } else {
		beep();
	    }
	    break;
	case KEY_LEFT:
	    if (x > 0) {
		--x;
	    } else {
		flash();
	    }
	    break;
	case KEY_RIGHT:
	    ++x;
	    break;
	default:
	    if (!isprint(ch) || ch >= KEY_MIN) {
		beep();
	    } else if ((int) strlen(buffer) < limit) {
		int j;
		for (j = (int) strlen(buffer) + 1; j > x; --j) {
		    buffer[j] = buffer[j - 1];
		}
		buffer[x++] = (char) ch;
	    } else {
		flash();
	    }
	}
    }

    wattroff(win, A_REVERSE);
    wmove(win, y0, x0);
    noecho();
}

#if USE_WIDEC_SUPPORT
static wchar_t
fullwidth_of(int ch)
{
    return (ch + 0xff10 - '0');
}

static void
make_fullwidth_text(wchar_t *target, const char *source)
{
    int ch;
    while ((ch = *source++) != 0) {
	*target++ = fullwidth_of(ch);
    }
    *target = 0;
}

static void
make_narrow_text(wchar_t *target, const char *source)
{
    int ch;
    while ((ch = *source++) != 0) {
	*target++ = ch;
    }
    *target = 0;
}

static void
make_fullwidth_digit(cchar_t *target, int digit)
{
    wchar_t source[2];

    source[0] = fullwidth_of(digit + '0');
    source[1] = 0;
    setcchar(target, source, A_NORMAL, 0, 0);
}

static int
wGet_wchar(WINDOW *win, wint_t *result)
{
    int c;
#ifdef TRACE
    while ((c = wget_wch(win, result)) == CTRL('T')) {
	if (_nc_tracing) {
	    save_trace = _nc_tracing;
	    Trace(("TOGGLE-TRACING OFF"));
	    _nc_tracing = 0;
	} else {
	    _nc_tracing = save_trace;
	}
	trace(_nc_tracing);
	if (_nc_tracing)
	    Trace(("TOGGLE-TRACING ON"));
    }
#else
    c = wget_wch(win, result);
#endif
    return c;
}
#define Get_wchar(result) wGet_wchar(stdscr, result)

/* replaces wgetn_wstr(), since we want to be able to edit values */
static void
wGet_wstring(WINDOW *win, wchar_t *buffer, int limit)
{
    int y0, x0, x;
    wint_t ch;
    bool done = FALSE;
    bool fkey = FALSE;

    echo();
    getyx(win, y0, x0);
    wattrset(win, A_REVERSE);

    x = (int) wcslen(buffer);
    while (!done) {
	if (x > (int) wcslen(buffer))
	    x = (int) wcslen(buffer);

	/* clear the "window' */
	wmove(win, y0, x0);
	wprintw(win, "%*s", limit, " ");

	/* write the existing buffer contents */
	wmove(win, y0, x0);
	waddnwstr(win, buffer, limit);

	/* positions the cursor past character 'x' */
	wmove(win, y0, x0);
	waddnwstr(win, buffer, x);

	switch (wGet_wchar(win, &ch)) {
	case KEY_CODE_YES:
	    fkey = TRUE;
	    switch (ch) {
	    case KEY_ENTER:
		ch = '\n';
		fkey = FALSE;
		break;
	    case KEY_BACKSPACE:
	    case KEY_DC:
		ch = '\b';
		fkey = FALSE;
		break;
	    case KEY_LEFT:
	    case KEY_RIGHT:
		break;
	    default:
		ch = (wint_t) -1;
		break;
	    }
	    break;
	case OK:
	    fkey = FALSE;
	    break;
	default:
	    ch = (wint_t) -1;
	    fkey = TRUE;
	    break;
	}

	switch (ch) {
	case '\n':
	    done = TRUE;
	    break;
	case CTRL('U'):
	    *buffer = '\0';
	    break;
	case '\b':
	    if (x > 0) {
		int j;
		for (j = --x; (buffer[j] = buffer[j + 1]) != '\0'; ++j) {
		    ;
		}
	    } else {
		beep();
	    }
	    break;
	case KEY_LEFT:
	    if (x > 0) {
		--x;
	    } else {
		beep();
	    }
	    break;
	case KEY_RIGHT:
	    ++x;
	    break;
	default:
	    if (fkey) {
		beep();
	    } else if ((int) wcslen(buffer) < limit) {
		int j;
		for (j = (int) wcslen(buffer) + 1; j > x; --j) {
		    buffer[j] = buffer[j - 1];
		}
		buffer[x++] = (wchar_t) ch;
	    } else {
		beep();
	    }
	}
    }

    wattroff(win, A_REVERSE);
    wmove(win, y0, x0);
    noecho();
}

#endif

static void
Pause(void)
{
    move(LINES - 1, 0);
    addstr("Press any key to continue... ");
    (void) Getchar();
}

static void
Cannot(const char *what)
{
    printw("\nThis %s terminal %s\n\n", getenv("TERM"), what);
    Pause();
}

static void
ShellOut(bool message)
{
    if (message)
	addstr("Shelling out...");
    def_prog_mode();
    endwin();
    system("sh");
    if (message)
	addstr("returned from shellout.\n");
    refresh();
}

#ifdef NCURSES_MOUSE_VERSION
/*
 * This function is the same as _tracemouse(), but we cannot count on that
 * being available in the non-debug library.
 */
static const char *
mouse_decode(MEVENT const *ep)
{
    static char buf[80 + (5 * 10) + (32 * 15)];

    (void) sprintf(buf, "id %2d  at (%2d, %2d, %2d) state %4lx = {",
		   ep->id, ep->x, ep->y, ep->z, (unsigned long) ep->bstate);

#define SHOW(m, s) if ((ep->bstate & m)==m) {strcat(buf,s); strcat(buf, ", ");}

    SHOW(BUTTON1_RELEASED, "release-1");
    SHOW(BUTTON1_PRESSED, "press-1");
    SHOW(BUTTON1_CLICKED, "click-1");
    SHOW(BUTTON1_DOUBLE_CLICKED, "doubleclick-1");
    SHOW(BUTTON1_TRIPLE_CLICKED, "tripleclick-1");
#if NCURSES_MOUSE_VERSION == 1
    SHOW(BUTTON1_RESERVED_EVENT, "reserved-1");
#endif

    SHOW(BUTTON2_RELEASED, "release-2");
    SHOW(BUTTON2_PRESSED, "press-2");
    SHOW(BUTTON2_CLICKED, "click-2");
    SHOW(BUTTON2_DOUBLE_CLICKED, "doubleclick-2");
    SHOW(BUTTON2_TRIPLE_CLICKED, "tripleclick-2");
#if NCURSES_MOUSE_VERSION == 1
    SHOW(BUTTON2_RESERVED_EVENT, "reserved-2");
#endif

    SHOW(BUTTON3_RELEASED, "release-3");
    SHOW(BUTTON3_PRESSED, "press-3");
    SHOW(BUTTON3_CLICKED, "click-3");
    SHOW(BUTTON3_DOUBLE_CLICKED, "doubleclick-3");
    SHOW(BUTTON3_TRIPLE_CLICKED, "tripleclick-3");
#if NCURSES_MOUSE_VERSION == 1
    SHOW(BUTTON3_RESERVED_EVENT, "reserved-3");
#endif

    SHOW(BUTTON4_RELEASED, "release-4");
    SHOW(BUTTON4_PRESSED, "press-4");
    SHOW(BUTTON4_CLICKED, "click-4");
    SHOW(BUTTON4_DOUBLE_CLICKED, "doubleclick-4");
    SHOW(BUTTON4_TRIPLE_CLICKED, "tripleclick-4");
#if NCURSES_MOUSE_VERSION == 1
    SHOW(BUTTON4_RESERVED_EVENT, "reserved-4");
#endif

#if NCURSES_MOUSE_VERSION == 2
    SHOW(BUTTON5_RELEASED, "release-5");
    SHOW(BUTTON5_PRESSED, "press-5");
    SHOW(BUTTON5_CLICKED, "click-5");
    SHOW(BUTTON5_DOUBLE_CLICKED, "doubleclick-5");
    SHOW(BUTTON5_TRIPLE_CLICKED, "tripleclick-5");
#endif

    SHOW(BUTTON_CTRL, "ctrl");
    SHOW(BUTTON_SHIFT, "shift");
    SHOW(BUTTON_ALT, "alt");
    SHOW(ALL_MOUSE_EVENTS, "all-events");
    SHOW(REPORT_MOUSE_POSITION, "position");

#undef SHOW

    if (buf[strlen(buf) - 1] == ' ')
	buf[strlen(buf) - 2] = '\0';
    (void) strcat(buf, "}");
    return (buf);
}
#endif /* NCURSES_MOUSE_VERSION */

/****************************************************************************
 *
 * Character input test
 *
 ****************************************************************************/

static void
setup_getch(WINDOW *win, bool flags[])
{
    keypad(win, flags['k']);	/* should be redundant, but for testing */
    meta(win, flags['m']);	/* force this to a known state */
    if (flags['e'])
	echo();
    else
	noecho();
}

static void
wgetch_help(WINDOW *win, bool flags[])
{
    static const char *help[] =
    {
	"e  -- toggle echo mode"
	,"g  -- triggers a getstr test"
	,"k  -- toggle keypad/literal mode"
	,"m  -- toggle meta (7-bit/8-bit) mode"
	,"^q -- quit"
	,"s  -- shell out\n"
	,"w  -- create a new window"
#ifdef SIGTSTP
	,"z  -- suspend this process"
#endif
    };
    int y, x;
    unsigned chk = ((SIZEOF(help) + 1) / 2);
    unsigned n;

    getyx(win, y, x);
    move(0, 0);
    printw("Type any key to see its %s value.  Also:\n",
	   flags['k'] ? "keypad" : "literal");
    for (n = 0; n < SIZEOF(help); ++n) {
	int row = 1 + (int) (n % chk);
	int col = (n >= chk) ? COLS / 2 : 0;
	int flg = ((strstr(help[n], "toggle") != 0)
		   && (flags[UChar(*help[n])] != FALSE));
	if (flg)
	    standout();
	mvprintw(row, col, "%s", help[n]);
	if (col == 0)
	    clrtoeol();
	if (flg)
	    standend();
    }
    wrefresh(stdscr);
    wmove(win, y, x);
}

static void
wgetch_wrap(WINDOW *win, int first_y)
{
    int last_y = getmaxy(win) - 1;
    int y = getcury(win) + 1;

    if (y >= last_y)
	y = first_y;
    wmove(win, y, 0);
    wclrtoeol(win);
}

#if defined(NCURSES_VERSION) && defined(KEY_RESIZE) && HAVE_WRESIZE
typedef struct {
    WINDOW *text;
    WINDOW *frame;
} WINSTACK;

static WINSTACK *winstack = 0;
static unsigned len_winstack = 0;

static void
forget_boxes(void)
{
    if (winstack != 0) {
	free(winstack);
    }
    winstack = 0;
    len_winstack = 0;
}

static void
remember_boxes(unsigned level, WINDOW *txt_win, WINDOW *box_win)
{
    unsigned need = (level + 1) * 2;

    assert(level < COLS);

    if (winstack == 0) {
	len_winstack = 20;
	winstack = typeMalloc(WINSTACK, len_winstack);
    } else if (need >= len_winstack) {
	len_winstack = need;
	winstack = typeRealloc(WINSTACK, len_winstack, winstack);
    }
    winstack[level].text = txt_win;
    winstack[level].frame = box_win;
}

#if USE_SOFTKEYS && (NCURSES_VERSION_PATCH < 20071229) && NCURSES_EXT_FUNCS
static void
slk_repaint(void)
{
    /* this chunk is now done in resize_term() */
    slk_touch();
    slk_clear();
    slk_noutrefresh();
}

#else
#define slk_repaint()		/* nothing */
#endif

/*
 * For wgetch_test(), we create pairs of windows - one for a box, one for text.
 * Resize both and paint the box in the parent.
 */
static void
resize_boxes(unsigned level, WINDOW *win)
{
    unsigned n;
    int base = 5;
    int high = LINES - base;
    int wide = COLS;

    touchwin(stdscr);
    wnoutrefresh(stdscr);

    slk_repaint();

    for (n = 0; n < level; ++n) {
	wresize(winstack[n].frame, high, wide);
	wresize(winstack[n].text, high - 2, wide - 2);
	high -= 2;
	wide -= 2;
	werase(winstack[n].text);
	box(winstack[n].frame, 0, 0);
	wnoutrefresh(winstack[n].frame);
	wprintw(winstack[n].text,
		"size %dx%d\n",
		getmaxy(winstack[n].text),
		getmaxx(winstack[n].text));
	wnoutrefresh(winstack[n].text);
	if (winstack[n].text == win)
	    break;
    }
    doupdate();
}
#else
#define forget_boxes()		/* nothing */
#define remember_boxes(level,text,frame)	/* nothing */
#endif

static void
wgetch_test(unsigned level, WINDOW *win, int delay)
{
    char buf[BUFSIZ];
    int first_y, first_x;
    int c;
    int incount = 0;
    bool flags[256];
    bool blocking = (delay < 0);

    memset(flags, FALSE, sizeof(flags));
    flags[UChar('k')] = (win == stdscr);

    setup_getch(win, flags);
    wtimeout(win, delay);
    getyx(win, first_y, first_x);

    wgetch_help(win, flags);
    wsetscrreg(win, first_y, getmaxy(win) - 1);
    scrollok(win, TRUE);

    for (;;) {
	while ((c = wGetchar(win)) == ERR) {
	    incount++;
	    if (blocking) {
		(void) wprintw(win, "%05d: input error", incount);
		break;
	    } else {
		(void) wprintw(win, "%05d: input timed out", incount);
	    }
	    wgetch_wrap(win, first_y);
	}
	if (c == ERR && blocking) {
	    wprintw(win, "ERR");
	    wgetch_wrap(win, first_y);
	} else if (isQuit(c)) {
	    break;
	} else if (c == 'e') {
	    flags[UChar('e')] = !flags[UChar('e')];
	    setup_getch(win, flags);
	    wgetch_help(win, flags);
	} else if (c == 'g') {
	    waddstr(win, "getstr test: ");
	    echo();
	    wgetnstr(win, buf, sizeof(buf) - 1);
	    noecho();
	    wprintw(win, "I saw %d characters:\n\t`%s'.", (int) strlen(buf), buf);
	    wclrtoeol(win);
	    wgetch_wrap(win, first_y);
	} else if (c == 'k') {
	    flags[UChar('k')] = !flags[UChar('k')];
	    setup_getch(win, flags);
	    wgetch_help(win, flags);
	} else if (c == 'm') {
	    flags[UChar('m')] = !flags[UChar('m')];
	    setup_getch(win, flags);
	    wgetch_help(win, flags);
	} else if (c == 's') {
	    ShellOut(TRUE);
	} else if (c == 'w') {
	    int high = getmaxy(win) - 1 - first_y + 1;
	    int wide = getmaxx(win) - first_x;
	    int old_y, old_x;
	    int new_y = first_y + getbegy(win);
	    int new_x = first_x + getbegx(win);

	    getyx(win, old_y, old_x);
	    if (high > 2 && wide > 2) {
		WINDOW *wb = newwin(high, wide, new_y, new_x);
		WINDOW *wi = newwin(high - 2, wide - 2, new_y + 1, new_x + 1);

		box(wb, 0, 0);
		wrefresh(wb);
		wmove(wi, 0, 0);
		remember_boxes(level, wi, wb);
		wgetch_test(level + 1, wi, delay);
		delwin(wi);
		delwin(wb);

		wgetch_help(win, flags);
		wmove(win, old_y, old_x);
		touchwin(win);
		wrefresh(win);
		doupdate();
	    }
#ifdef SIGTSTP
	} else if (c == 'z') {
	    kill(getpid(), SIGTSTP);
#endif
	} else {
	    wprintw(win, "Key pressed: %04o ", c);
#ifdef NCURSES_MOUSE_VERSION
	    if (c == KEY_MOUSE) {
		int y, x;
		MEVENT event;

		getmouse(&event);
		wprintw(win, "KEY_MOUSE, %s", mouse_decode(&event));
		getyx(win, y, x);
		move(event.y, event.x);
		addch('*');
		wmove(win, y, x);
	    } else
#endif /* NCURSES_MOUSE_VERSION */
	    if (c >= KEY_MIN) {
#if defined(NCURSES_VERSION) && defined(KEY_RESIZE) && HAVE_WRESIZE
		if (c == KEY_RESIZE) {
		    resize_boxes(level, win);
		}
#endif
		(void) waddstr(win, keyname(c));
	    } else if (c > 0x80) {
		unsigned c2 = (unsigned) (c & 0x7f);
		if (isprint(c2))
		    (void) wprintw(win, "M-%c", UChar(c2));
		else
		    (void) wprintw(win, "M-%s", unctrl(c2));
		waddstr(win, " (high-half character)");
	    } else {
		if (isprint(c))
		    (void) wprintw(win, "%c (ASCII printable character)", c);
		else
		    (void) wprintw(win, "%s (ASCII control character)",
				   unctrl(UChar(c)));
	    }
	    wgetch_wrap(win, first_y);
	}
    }

    wtimeout(win, -1);
}

static int
begin_getch_test(void)
{
    char buf[BUFSIZ];
    int delay;

    refresh();

#ifdef NCURSES_MOUSE_VERSION
    mousemask(ALL_MOUSE_EVENTS, (mmask_t *) 0);
#endif

    (void) printw("Delay in 10ths of a second (<CR> for blocking input)? ");
    echo();
    getnstr(buf, sizeof(buf) - 1);
    noecho();
    nonl();

    if (isdigit(UChar(buf[0]))) {
	delay = atoi(buf) * 100;
    } else {
	delay = -1;
    }
    raw();
    move(5, 0);
    return delay;
}

static void
finish_getch_test(void)
{
#ifdef NCURSES_MOUSE_VERSION
    mousemask(0, (mmask_t *) 0);
#endif
    erase();
    noraw();
    nl();
    endwin();
}

static void
getch_test(void)
{
    int delay = begin_getch_test();

    slk_restore();
    wgetch_test(0, stdscr, delay);
    forget_boxes();
    finish_getch_test();
}

#if USE_WIDEC_SUPPORT
/*
 * For wget_wch_test(), we create pairs of windows - one for a box, one for text.
 * Resize both and paint the box in the parent.
 */
#if defined(KEY_RESIZE) && HAVE_WRESIZE
static void
resize_wide_boxes(unsigned level, WINDOW *win)
{
    unsigned n;
    int base = 5;
    int high = LINES - base;
    int wide = COLS;

    touchwin(stdscr);
    wnoutrefresh(stdscr);

    slk_repaint();

    for (n = 0; n < level; ++n) {
	wresize(winstack[n].frame, high, wide);
	wresize(winstack[n].text, high - 2, wide - 2);
	high -= 2;
	wide -= 2;
	werase(winstack[n].text);
	box_set(winstack[n].frame, 0, 0);
	wnoutrefresh(winstack[n].frame);
	wprintw(winstack[n].text,
		"size %dx%d\n",
		getmaxy(winstack[n].text),
		getmaxx(winstack[n].text));
	wnoutrefresh(winstack[n].text);
	if (winstack[n].text == win)
	    break;
    }
    doupdate();
}
#endif /* KEY_RESIZE */

static char *
wcstos(const wchar_t *src)
{
    int need;
    char *result = 0;
    const wchar_t *tmp = src;
#ifndef state_unused
    mbstate_t state;
#endif

    reset_wchars(state);
    if ((need = (int) count_wchars(tmp, 0, &state)) > 0) {
	unsigned have = (unsigned) need;
	if ((result = typeCalloc(char, have + 1)) != 0) {
	    tmp = src;
	    if (trans_wchars(result, tmp, have, &state) != have) {
		free(result);
		result = 0;
	    }
	}
    }
    return result;
}

static void
wget_wch_test(unsigned level, WINDOW *win, int delay)
{
    wchar_t wchar_buf[BUFSIZ];
    wint_t wint_buf[BUFSIZ];
    int first_y, first_x;
    wint_t c;
    int incount = 0;
    bool flags[256];
    bool blocking = (delay < 0);
    int y, x, code;
    char *temp;

    memset(flags, FALSE, sizeof(flags));
    flags[UChar('k')] = (win == stdscr);

    setup_getch(win, flags);
    wtimeout(win, delay);
    getyx(win, first_y, first_x);

    wgetch_help(win, flags);
    wsetscrreg(win, first_y, getmaxy(win) - 1);
    scrollok(win, TRUE);

    for (;;) {
	while ((code = wGet_wchar(win, &c)) == ERR) {
	    incount++;
	    if (blocking) {
		(void) wprintw(win, "%05d: input error", incount);
		break;
	    } else {
		(void) wprintw(win, "%05d: input timed out", incount);
	    }
	    wgetch_wrap(win, first_y);
	}
	if (code == ERR && blocking) {
	    wprintw(win, "ERR");
	    wgetch_wrap(win, first_y);
	} else if (isQuit((int) c)) {
	    break;
	} else if (c == 'e') {
	    flags[UChar('e')] = !flags[UChar('e')];
	    setup_getch(win, flags);
	    wgetch_help(win, flags);
	} else if (c == 'g') {
	    waddstr(win, "getstr test: ");
	    echo();
	    code = wgetn_wstr(win, wint_buf, sizeof(wint_buf) - 1);
	    noecho();
	    if (code == ERR) {
		wprintw(win, "wgetn_wstr returns an error.");
	    } else {
		int n;
		for (n = 0; (wchar_buf[n] = (wchar_t) wint_buf[n]) != 0; ++n) {
		    ;
		}
		if ((temp = wcstos(wchar_buf)) != 0) {
		    wprintw(win, "I saw %d characters:\n\t`%s'.",
			    (int) wcslen(wchar_buf), temp);
		    free(temp);
		} else {
		    wprintw(win, "I saw %d characters (cannot convert).",
			    (int) wcslen(wchar_buf));
		}
	    }
	    wclrtoeol(win);
	    wgetch_wrap(win, first_y);
	} else if (c == 'k') {
	    flags[UChar('k')] = !flags[UChar('k')];
	    setup_getch(win, flags);
	    wgetch_help(win, flags);
	} else if (c == 'm') {
	    flags[UChar('m')] = !flags[UChar('m')];
	    setup_getch(win, flags);
	    wgetch_help(win, flags);
	} else if (c == 's') {
	    ShellOut(TRUE);
	} else if (c == 'w') {
	    int high = getmaxy(win) - 1 - first_y + 1;
	    int wide = getmaxx(win) - first_x;
	    int old_y, old_x;
	    int new_y = first_y + getbegy(win);
	    int new_x = first_x + getbegx(win);

	    getyx(win, old_y, old_x);
	    if (high > 2 && wide > 2) {
		WINDOW *wb = newwin(high, wide, new_y, new_x);
		WINDOW *wi = newwin(high - 2, wide - 2, new_y + 1, new_x + 1);

		box_set(wb, 0, 0);
		wrefresh(wb);
		wmove(wi, 0, 0);
		remember_boxes(level, wi, wb);
		wget_wch_test(level + 1, wi, delay);
		delwin(wi);
		delwin(wb);

		wgetch_help(win, flags);
		wmove(win, old_y, old_x);
		touchwin(win);
		wrefresh(win);
	    }
#ifdef SIGTSTP
	} else if (c == 'z') {
	    kill(getpid(), SIGTSTP);
#endif
	} else {
	    wprintw(win, "Key pressed: %04o ", (int) c);
#ifdef NCURSES_MOUSE_VERSION
	    if (c == KEY_MOUSE) {
		MEVENT event;

		getmouse(&event);
		wprintw(win, "KEY_MOUSE, %s", mouse_decode(&event));
		getyx(win, y, x);
		move(event.y, event.x);
		addch('*');
		wmove(win, y, x);
	    } else
#endif /* NCURSES_MOUSE_VERSION */
	    if (code == KEY_CODE_YES) {
#if defined(KEY_RESIZE) && HAVE_WRESIZE
		if (c == KEY_RESIZE) {
		    resize_wide_boxes(level, win);
		}
#endif
		(void) waddstr(win, key_name((wchar_t) c));
	    } else {
		if (c < 256 && iscntrl(c)) {
		    (void) wprintw(win, "%s (control character)", unctrl(c));
		} else {
		    wchar_t c2 = (wchar_t) c;
		    waddnwstr(win, &c2, 1);
		    (void) wprintw(win, " = %#x (printable character)", (unsigned) c);
		}
	    }
	    wgetch_wrap(win, first_y);
	}
    }

    wtimeout(win, -1);
}

static void
get_wch_test(void)
{
    int delay = begin_getch_test();

    slk_restore();
    wget_wch_test(0, stdscr, delay);
    forget_boxes();
    finish_getch_test();
}
#endif

/****************************************************************************
 *
 * Character attributes test
 *
 ****************************************************************************/

#if HAVE_SETUPTERM || HAVE_TGETENT
#define get_ncv() TIGETNUM("ncv","NC")
#define get_xmc() TIGETNUM("xmc","sg")
#else
#define get_ncv() -1
#define get_xmc() -1
#endif

#if !HAVE_TERMATTRS
static chtype
my_termattrs(void)
{
    static int first = TRUE;
    static chtype result = 0;

    if (first) {
#if !HAVE_TIGETSTR
	char buffer[4096];
	char parsed[4096];
	char *area_pointer = parsed;

	tgetent(buffer, getenv("TERM"));
#endif

	if (TIGETSTR("smso", "so"))
	    result |= A_STANDOUT;
	if (TIGETSTR("smul", "us"))
	    result |= A_UNDERLINE;
	if (TIGETSTR("rev", "mr"))
	    result |= A_REVERSE;
	if (TIGETSTR("blink", "mb"))
	    result |= A_BLINK;
	if (TIGETSTR("dim", "mh"))
	    result |= A_DIM;
	if (TIGETSTR("bold", "md"))
	    result |= A_BOLD;
	if (TIGETSTR("smacs", "ac"))
	    result |= A_ALTCHARSET;

	first = FALSE;
    }
    return result;
}
#define termattrs() my_termattrs()
#endif

#define MAX_ATTRSTRING 31
#define LEN_ATTRSTRING 26

static char attr_test_string[MAX_ATTRSTRING + 1];

static void
attr_legend(WINDOW *helpwin)
{
    int row = 1;
    int col = 1;

    mvwprintw(helpwin, row++, col,
	      "ESC to exit.");
    mvwprintw(helpwin, row++, col,
	      "^L repaints.");
    ++row;
    mvwprintw(helpwin, row++, col,
	      "Modify the test strings:");
    mvwprintw(helpwin, row++, col,
	      "  A digit sets gaps on each side of displayed attributes");
    mvwprintw(helpwin, row++, col,
	      "  </> shifts the text left/right. ");
    ++row;
    mvwprintw(helpwin, row++, col,
	      "Toggles:");
    if (use_colors) {
	mvwprintw(helpwin, row++, col,
		  "  f/F/b/F toggle foreground/background background color");
	mvwprintw(helpwin, row++, col,
		  "  t/T     toggle text/background color attribute");
    }
    mvwprintw(helpwin, row++, col,
	      "  a/A     toggle ACS (alternate character set) mapping");
    mvwprintw(helpwin, row++, col,
	      "  v/V     toggle video attribute to combine with each line");
}

static void
show_color_attr(int fg, int bg, int tx)
{
    if (use_colors) {
	printw("  Colors (fg %d, bg %d", fg, bg);
	if (tx >= 0)
	    printw(", text %d", tx);
	printw("),");
    }
}

static bool
cycle_color_attr(int ch, short *fg, short *bg, short *tx)
{
    bool error = FALSE;

    if (use_colors) {
	switch (ch) {
	case 'f':
	    *fg = (short) (*fg + 1);
	    break;
	case 'F':
	    *fg = (short) (*fg - 1);
	    break;
	case 'b':
	    *bg = (short) (*bg + 1);
	    break;
	case 'B':
	    *bg = (short) (*bg - 1);
	    break;
	case 't':
	    *tx = (short) (*tx + 1);
	    break;
	case 'T':
	    *tx = (short) (*tx - 1);
	    break;
	default:
	    beep();
	    error = TRUE;
	    break;
	}
	if (*fg >= COLORS)
	    *fg = (short) min_colors;
	if (*fg < min_colors)
	    *fg = (short) (COLORS - 1);
	if (*bg >= COLORS)
	    *bg = (short) min_colors;
	if (*bg < min_colors)
	    *bg = (short) (COLORS - 1);
	if (*tx >= COLORS)
	    *tx = -1;
	if (*tx < -1)
	    *tx = (short) (COLORS - 1);
    } else {
	beep();
	error = TRUE;
    }
    return error;
}

static void
adjust_attr_string(int adjust)
{
    int first = ((int) UChar(attr_test_string[0])) + adjust;
    int last = first + LEN_ATTRSTRING;

    if (first >= ' ' && last <= '~') {	/* 32..126 */
	int j, k;
	for (j = 0, k = first; j < MAX_ATTRSTRING && k <= last; ++j, ++k) {
	    attr_test_string[j] = (char) k;
	    if (((k + 1 - first) % 5) == 0) {
		if (++j >= MAX_ATTRSTRING)
		    break;
		attr_test_string[j] = ' ';
	    }
	}
	while (j < MAX_ATTRSTRING)
	    attr_test_string[j++] = ' ';
	attr_test_string[j] = '\0';
    } else {
	beep();
    }
}

static void
init_attr_string(void)
{
    attr_test_string[0] = 'a';
    adjust_attr_string(0);
}

static int
show_attr(int row, int skip, bool arrow, chtype attr, const char *name)
{
    int ncv = get_ncv();
    chtype test = attr & (chtype) (~A_ALTCHARSET);

    if (arrow)
	mvprintw(row, 5, "-->");
    mvprintw(row, 8, "%s mode:", name);
    mvprintw(row, 24, "|");
    if (skip)
	printw("%*s", skip, " ");
    /*
     * Just for testing, write text using the alternate character set one
     * character at a time (to pass its rendition directly), and use the
     * string operation for the other attributes.
     */
    if (attr & A_ALTCHARSET) {
	const char *s;
	chtype ch;

	for (s = attr_test_string; *s != '\0'; ++s) {
	    ch = UChar(*s);
	    addch(ch | attr);
	}
    } else {
	attrset(attr);
	addstr(attr_test_string);
	attroff(attr);
    }
    if (skip)
	printw("%*s", skip, " ");
    printw("|");
    if (test != A_NORMAL) {
	if (!(termattrs() & test)) {
	    printw(" (N/A)");
	} else {
	    if (ncv > 0 && (getbkgd(stdscr) & A_COLOR)) {
		static const chtype table[] =
		{
		    A_STANDOUT,
		    A_UNDERLINE,
		    A_REVERSE,
		    A_BLINK,
		    A_DIM,
		    A_BOLD,
#ifdef A_INVIS
		    A_INVIS,
#endif
		    A_PROTECT,
		    A_ALTCHARSET
		};
		unsigned n;
		bool found = FALSE;
		for (n = 0; n < SIZEOF(table); n++) {
		    if ((table[n] & attr) != 0
			&& ((1 << n) & ncv) != 0) {
			found = TRUE;
			break;
		    }
		}
		if (found)
		    printw(" (NCV)");
	    }
	    if ((termattrs() & test) != test)
		printw(" (Part)");
	}
    }
    return row + 2;
}
/* *INDENT-OFF* */
static const struct {
    chtype			attr;
    NCURSES_CONST char *	name;
} attrs_to_test[] = {
    { A_STANDOUT,	"STANDOUT" },
    { A_REVERSE,	"REVERSE" },
    { A_BOLD,		"BOLD" },
    { A_UNDERLINE,	"UNDERLINE" },
    { A_DIM,		"DIM" },
    { A_BLINK,		"BLINK" },
    { A_PROTECT,	"PROTECT" },
#ifdef A_INVIS
    { A_INVIS,		"INVISIBLE" },
#endif
    { A_NORMAL,		"NORMAL" },
};
/* *INDENT-ON* */

static bool
attr_getc(int *skip, short *fg, short *bg, short *tx, int *ac, unsigned *kc)
{
    bool result = TRUE;
    bool error = FALSE;
    WINDOW *helpwin;

    do {
	int ch = Getchar();

	error = FALSE;
	if (ch < 256 && isdigit(ch)) {
	    *skip = (ch - '0');
	} else {
	    switch (ch) {
	    case CTRL('L'):
		Repaint();
		break;
	    case '?':
		if ((helpwin = newwin(LINES - 1, COLS - 2, 0, 0)) != 0) {
		    box(helpwin, 0, 0);
		    attr_legend(helpwin);
		    wGetchar(helpwin);
		    delwin(helpwin);
		}
		break;
	    case 'a':
		*ac = 0;
		break;
	    case 'A':
		*ac = A_ALTCHARSET;
		break;
	    case 'v':
		if (*kc == 0)
		    *kc = SIZEOF(attrs_to_test) - 1;
		else
		    *kc -= 1;
		break;
	    case 'V':
		*kc += 1;
		if (*kc >= SIZEOF(attrs_to_test))
		    *kc = 0;
		break;
	    case '<':
		adjust_attr_string(-1);
		break;
	    case '>':
		adjust_attr_string(1);
		break;
	    case case_QUIT:
		result = FALSE;
		break;
	    default:
		error = cycle_color_attr(ch, fg, bg, tx);
		break;
	    }
	}
    } while (error);
    return result;
}

static void
attr_test(void)
/* test text attributes */
{
    int n;
    int skip = get_xmc();
    short fg = COLOR_BLACK;	/* color pair 0 is special */
    short bg = COLOR_BLACK;
    short tx = -1;
    int ac = 0;
    unsigned j, k;

    if (skip < 0)
	skip = 0;

    n = skip;			/* make it easy */
    k = SIZEOF(attrs_to_test) - 1;
    init_attr_string();

    do {
	int row = 2;
	chtype normal = A_NORMAL | BLANK;
	chtype extras = (chtype) ac;

	if (use_colors) {
	    short pair = (short) (fg != COLOR_BLACK || bg != COLOR_BLACK);
	    if (pair != 0) {
		pair = 1;
		if (init_pair(pair, fg, bg) == ERR) {
		    beep();
		} else {
		    normal |= COLOR_PAIR(pair);
		}
	    }
	    if (tx >= 0) {
		pair = 2;
		if (init_pair(pair, tx, bg) == ERR) {
		    beep();
		} else {
		    extras |= COLOR_PAIR(pair);
		}
	    }
	}
	bkgd(normal);
	bkgdset(normal);
	erase();

	box(stdscr, 0, 0);
	mvaddstr(0, 20, "Character attribute test display");

	for (j = 0; j < SIZEOF(attrs_to_test); ++j) {
	    bool arrow = (j == k);
	    row = show_attr(row, n, arrow,
			    extras |
			    attrs_to_test[j].attr |
			    attrs_to_test[k].attr,
			    attrs_to_test[j].name);
	}

	mvprintw(row, 8,
		 "This terminal does %shave the magic-cookie glitch",
		 get_xmc() > -1 ? "" : "not ");
	mvprintw(row + 1, 8, "Enter '?' for help.");
	show_color_attr(fg, bg, tx);
	printw("  ACS (%d)", ac != 0);

	refresh();
    } while (attr_getc(&n, &fg, &bg, &tx, &ac, &k));

    bkgdset(A_NORMAL | BLANK);
    erase();
    endwin();
}

#if USE_WIDEC_SUPPORT
static wchar_t wide_attr_test_string[MAX_ATTRSTRING + 1];

static void
wide_adjust_attr_string(int adjust)
{
    int first = ((int) UChar(wide_attr_test_string[0])) + adjust;
    int last = first + LEN_ATTRSTRING;

    if (first >= ' ' && last <= '~') {	/* 32..126 */
	int j, k;
	for (j = 0, k = first; j < MAX_ATTRSTRING && k <= last; ++j, ++k) {
	    wide_attr_test_string[j] = k;
	    if (((k + 1 - first) % 5) == 0) {
		if (++j >= MAX_ATTRSTRING)
		    break;
		wide_attr_test_string[j] = ' ';
	    }
	}
	while (j < MAX_ATTRSTRING)
	    wide_attr_test_string[j++] = ' ';
	wide_attr_test_string[j] = '\0';
    } else {
	beep();
    }
}

static void
wide_init_attr_string(void)
{
    wide_attr_test_string[0] = 'a';
    wide_adjust_attr_string(0);
}

static void
set_wide_background(short pair)
{
    cchar_t normal;
    wchar_t blank[2];

    blank[0] = ' ';
    blank[1] = 0;
    setcchar(&normal, blank, A_NORMAL, pair, 0);
    bkgrnd(&normal);
    bkgrndset(&normal);
}

static attr_t
get_wide_background(void)
{
    attr_t result = A_NORMAL;
    attr_t attr;
    cchar_t ch;
    short pair;
    wchar_t wch[10];

    if (getbkgrnd(&ch) != ERR) {
	if (getcchar(&ch, wch, &attr, &pair, 0) != ERR) {
	    result = attr;
	}
    }
    return result;
}

static int
wide_show_attr(int row, int skip, bool arrow, chtype attr, short pair, const char *name)
{
    int ncv = get_ncv();
    chtype test = attr & ~WA_ALTCHARSET;

    if (arrow)
	mvprintw(row, 5, "-->");
    mvprintw(row, 8, "%s mode:", name);
    mvprintw(row, 24, "|");
    if (skip)
	printw("%*s", skip, " ");

    /*
     * Just for testing, write text using the alternate character set one
     * character at a time (to pass its rendition directly), and use the
     * string operation for the other attributes.
     */
    if (attr & WA_ALTCHARSET) {
	const wchar_t *s;
	cchar_t ch;

	for (s = wide_attr_test_string; *s != L'\0'; ++s) {
	    wchar_t fill[2];
	    fill[0] = *s;
	    fill[1] = L'\0';
	    setcchar(&ch, fill, attr, pair, 0);
	    add_wch(&ch);
	}
    } else {
	attr_t old_attr;
	short old_pair;

	attr_get(&old_attr, &old_pair, 0);
	attr_set(attr, pair, 0);
	addwstr(wide_attr_test_string);
	attr_set(old_attr, old_pair, 0);
    }
    if (skip)
	printw("%*s", skip, " ");
    printw("|");
    if (test != A_NORMAL) {
	if (!(term_attrs() & test)) {
	    printw(" (N/A)");
	} else {
	    if (ncv > 0 && (get_wide_background() & A_COLOR)) {
		static const attr_t table[] =
		{
		    WA_STANDOUT,
		    WA_UNDERLINE,
		    WA_REVERSE,
		    WA_BLINK,
		    WA_DIM,
		    WA_BOLD,
		    WA_INVIS,
		    WA_PROTECT,
		    WA_ALTCHARSET
		};
		unsigned n;
		bool found = FALSE;
		for (n = 0; n < SIZEOF(table); n++) {
		    if ((table[n] & attr) != 0
			&& ((1 << n) & ncv) != 0) {
			found = TRUE;
			break;
		    }
		}
		if (found)
		    printw(" (NCV)");
	    }
	    if ((term_attrs() & test) != test)
		printw(" (Part)");
	}
    }
    return row + 2;
}

static bool
wide_attr_getc(int *skip, short *fg, short *bg, short *tx, int *ac, unsigned *kc)
{
    bool result = TRUE;
    bool error = FALSE;
    WINDOW *helpwin;

    do {
	int ch = Getchar();

	error = FALSE;
	if (ch < 256 && isdigit(ch)) {
	    *skip = (ch - '0');
	} else {
	    switch (ch) {
	    case CTRL('L'):
		Repaint();
		break;
	    case '?':
		if ((helpwin = newwin(LINES - 1, COLS - 2, 0, 0)) != 0) {
		    box_set(helpwin, 0, 0);
		    attr_legend(helpwin);
		    wGetchar(helpwin);
		    delwin(helpwin);
		}
		break;
	    case 'a':
		*ac = 0;
		break;
	    case 'A':
		*ac = A_ALTCHARSET;
		break;
	    case 'v':
		if (*kc == 0)
		    *kc = SIZEOF(attrs_to_test) - 1;
		else
		    *kc -= 1;
		break;
	    case 'V':
		*kc += 1;
		if (*kc >= SIZEOF(attrs_to_test))
		    *kc = 0;
		break;
	    case '<':
		wide_adjust_attr_string(-1);
		break;
	    case '>':
		wide_adjust_attr_string(1);
		break;
	    case case_QUIT:
		result = FALSE;
		break;
	    default:
		error = cycle_color_attr(ch, fg, bg, tx);
		break;
	    }
	}
    } while (error);
    return result;
}

static void
wide_attr_test(void)
/* test text attributes using wide-character calls */
{
    int n;
    int skip = get_xmc();
    short fg = COLOR_BLACK;	/* color pair 0 is special */
    short bg = COLOR_BLACK;
    short tx = -1;
    int ac = 0;
    unsigned j, k;

    if (skip < 0)
	skip = 0;

    n = skip;			/* make it easy */
    k = SIZEOF(attrs_to_test) - 1;
    wide_init_attr_string();

    do {
	int row = 2;
	short pair = 0;
	short extras = 0;

	if (use_colors) {
	    pair = (short) (fg != COLOR_BLACK || bg != COLOR_BLACK);
	    if (pair != 0) {
		pair = 1;
		if (init_pair(pair, fg, bg) == ERR) {
		    beep();
		}
	    }
	    extras = pair;
	    if (tx >= 0) {
		extras = 2;
		if (init_pair(extras, tx, bg) == ERR) {
		    beep();
		}
	    }
	}
	set_wide_background(pair);
	erase();

	box_set(stdscr, 0, 0);
	mvaddstr(0, 20, "Character attribute test display");

	for (j = 0; j < SIZEOF(attrs_to_test); ++j) {
	    row = wide_show_attr(row, n, j == k,
				 ac |
				 attrs_to_test[j].attr |
				 attrs_to_test[k].attr,
				 extras,
				 attrs_to_test[j].name);
	}

	mvprintw(row, 8,
		 "This terminal does %shave the magic-cookie glitch",
		 get_xmc() > -1 ? "" : "not ");
	mvprintw(row + 1, 8, "Enter '?' for help.");
	show_color_attr(fg, bg, tx);
	printw("  ACS (%d)", ac != 0);

	refresh();
    } while (wide_attr_getc(&n, &fg, &bg, &tx, &ac, &k));

    set_wide_background(0);
    erase();
    endwin();
}
#endif

/****************************************************************************
 *
 * Color support tests
 *
 ****************************************************************************/

static NCURSES_CONST char *the_color_names[] =
{
    "black",
    "red",
    "green",
    "yellow",
    "blue",
    "magenta",
    "cyan",
    "white",
    "BLACK",
    "RED",
    "GREEN",
    "YELLOW",
    "BLUE",
    "MAGENTA",
    "CYAN",
    "WHITE"
};

static void
show_color_name(int y, int x, int color, bool wide)
{
    if (move(y, x) != ERR) {
	char temp[80];
	int width = 8;

	if (wide) {
	    sprintf(temp, "%02d", color);
	    width = 4;
	} else if (color >= 8) {
	    sprintf(temp, "[%02d]", color);
	} else {
	    strcpy(temp, the_color_names[color]);
	}
	printw("%-*.*s", width, width, temp);
    }
}

static void
color_legend(WINDOW *helpwin, bool wide)
{
    int row = 1;
    int col = 1;

    mvwprintw(helpwin, row++, col,
	      "ESC to exit.");
    ++row;
    mvwprintw(helpwin, row++, col,
	      "Use up/down arrow to scroll through the display if it is");
    mvwprintw(helpwin, row++, col,
	      "longer than one screen. Control/N and Control/P can be used");
    mvwprintw(helpwin, row++, col,
	      "in place of up/down arrow.  Use pageup/pagedown to scroll a");
    mvwprintw(helpwin, row++, col,
	      "full screen; control/B and control/F can be used here.");
    ++row;
    mvwprintw(helpwin, row++, col,
	      "Toggles:");
    mvwprintw(helpwin, row++, col,
	      "  a/A     toggle altcharset off/on");
    mvwprintw(helpwin, row++, col,
	      "  b/B     toggle bold off/on");
    mvwprintw(helpwin, row++, col,
	      "  n/N     toggle text/number on/off");
    mvwprintw(helpwin, row++, col,
	      "  w/W     toggle width between 8/16 colors");
#if USE_WIDEC_SUPPORT
    if (wide) {
	mvwprintw(helpwin, row++, col,
		  "Wide characters:");
	mvwprintw(helpwin, row++, col,
		  "  x/X     toggle text between ASCII and wide-character");
    }
#else
    (void) wide;
#endif
}

#define set_color_test(name, value) if (name != value) { name = value; base_row = 0; }

/* generate a color test pattern */
static void
color_test(void)
{
    short i;
    int top = 0, width;
    int base_row = 0;
    int grid_top = top + 3;
    int page_size = (LINES - grid_top);
    int pairs_max = PAIR_NUMBER(A_COLOR) + 1;
    int row_limit;
    int per_row;
    char numbered[80];
    const char *hello;
    bool done = FALSE;
    bool opt_acsc = FALSE;
    bool opt_bold = FALSE;
    bool opt_wide = FALSE;
    bool opt_nums = FALSE;
    WINDOW *helpwin;

    if (pairs_max > COLOR_PAIRS)
	pairs_max = COLOR_PAIRS;

    while (!done) {
	int shown = 0;

	/* this assumes an 80-column line */
	if (opt_wide) {
	    width = 4;
	    hello = "Test";
	    per_row = (COLORS > 8) ? 16 : 8;
	} else {
	    width = 8;
	    hello = "Hello";
	    per_row = 8;
	}

	row_limit = (pairs_max + per_row - 1) / per_row;

	move(0, 0);
	(void) printw("There are %d color pairs and %d colors\n",
		      pairs_max, COLORS);

	clrtobot();
	(void) mvprintw(top + 1, 0,
			"%dx%d matrix of foreground/background colors, bold *%s*\n",
			row_limit,
			per_row,
			opt_bold ? "on" : "off");

	/* show color names/numbers across the top */
	for (i = 0; i < per_row; i++)
	    show_color_name(top + 2, (i + 1) * width, i, opt_wide);

	/* show a grid of colors, with color names/ numbers on the left */
	for (i = (short) (base_row * per_row); i < pairs_max; i++) {
	    int row = grid_top + (i / per_row) - base_row;
	    int col = (i % per_row + 1) * width;
	    short pair = i;

	    if (row >= 0 && move(row, col) != ERR) {
		short fg = (short) (i % COLORS);
		short bg = (short) (i / COLORS);

		init_pair(pair, fg, bg);
		attron((attr_t) COLOR_PAIR(pair));
		if (opt_acsc)
		    attron((attr_t) A_ALTCHARSET);
		if (opt_bold)
		    attron((attr_t) A_BOLD);

		if (opt_nums) {
		    sprintf(numbered, "{%02X}", i);
		    hello = numbered;
		}
		printw("%-*.*s", width, width, hello);
		attrset(A_NORMAL);

		if ((i % per_row) == 0 && (i % COLORS) == 0) {
		    show_color_name(row, 0, i / COLORS, opt_wide);
		}
		++shown;
	    } else if (shown) {
		break;
	    }
	}

	switch (wGetchar(stdscr)) {
	case 'a':
	    opt_acsc = FALSE;
	    break;
	case 'A':
	    opt_acsc = TRUE;
	    break;
	case 'b':
	    opt_bold = FALSE;
	    break;
	case 'B':
	    opt_bold = TRUE;
	    break;
	case 'n':
	    opt_nums = FALSE;
	    break;
	case 'N':
	    opt_nums = TRUE;
	    break;
	case case_QUIT:
	    done = TRUE;
	    continue;
	case 'w':
	    set_color_test(opt_wide, FALSE);
	    break;
	case 'W':
	    set_color_test(opt_wide, TRUE);
	    break;
	case CTRL('p'):
	case KEY_UP:
	    if (base_row <= 0) {
		beep();
	    } else {
		base_row -= 1;
	    }
	    break;
	case CTRL('n'):
	case KEY_DOWN:
	    if (base_row + page_size >= row_limit) {
		beep();
	    } else {
		base_row += 1;
	    }
	    break;
	case CTRL('b'):
	case KEY_PREVIOUS:
	case KEY_PPAGE:
	    if (base_row <= 0) {
		beep();
	    } else {
		base_row -= (page_size - 1);
		if (base_row < 0)
		    base_row = 0;
	    }
	    break;
	case CTRL('f'):
	case KEY_NEXT:
	case KEY_NPAGE:
	    if (base_row + page_size >= row_limit) {
		beep();
	    } else {
		base_row += page_size - 1;
		if (base_row + page_size >= row_limit) {
		    base_row = row_limit - page_size - 1;
		}
	    }
	    break;
	case '?':
	    if ((helpwin = newwin(LINES - 1, COLS - 2, 0, 0)) != 0) {
		box(helpwin, 0, 0);
		color_legend(helpwin, FALSE);
		wGetchar(helpwin);
		delwin(helpwin);
	    }
	    break;
	default:
	    beep();
	    continue;
	}
    }

    erase();
    endwin();
}

#if USE_WIDEC_SUPPORT
/* generate a color test pattern */
static void
wide_color_test(void)
{
    int c;
    int i;
    int top = 0, width;
    int base_row = 0;
    int grid_top = top + 3;
    int page_size = (LINES - grid_top);
    int pairs_max = COLOR_PAIRS;
    int row_limit;
    int per_row;
    char numbered[80];
    const char *hello;
    bool done = FALSE;
    bool opt_acsc = FALSE;
    bool opt_bold = FALSE;
    bool opt_wide = FALSE;
    bool opt_nums = FALSE;
    bool opt_xchr = FALSE;
    wchar_t buffer[10];
    WINDOW *helpwin;

    while (!done) {
	int shown = 0;

	/* this assumes an 80-column line */
	if (opt_wide) {
	    width = 4;
	    hello = "Test";
	    per_row = (COLORS > 8) ? 16 : 8;
	} else {
	    width = 8;
	    hello = "Hello";
	    per_row = 8;
	}
	if (opt_xchr) {
	    make_fullwidth_text(buffer, hello);
	    width *= 2;
	    per_row /= 2;
	} else {
	    make_narrow_text(buffer, hello);
	}

	row_limit = (pairs_max + per_row - 1) / per_row;

	move(0, 0);
	(void) printw("There are %d color pairs and %d colors\n",
		      pairs_max, COLORS);

	clrtobot();
	(void) mvprintw(top + 1, 0,
			"%dx%d matrix of foreground/background colors, bold *%s*\n",
			row_limit,
			per_row,
			opt_bold ? "on" : "off");

	/* show color names/numbers across the top */
	for (i = 0; i < per_row; i++)
	    show_color_name(top + 2, (i + 1) * width, i, opt_wide);

	/* show a grid of colors, with color names/ numbers on the left */
	for (i = (base_row * per_row); i < pairs_max; i++) {
	    int row = grid_top + (i / per_row) - base_row;
	    int col = (i % per_row + 1) * width;
	    short pair = (short) i;

	    if (row >= 0 && move(row, col) != ERR) {
		init_pair(pair, (short) (i % COLORS), (short) (i / COLORS));
		color_set(pair, NULL);
		if (opt_acsc)
		    attr_on((attr_t) A_ALTCHARSET, NULL);
		if (opt_bold)
		    attr_on((attr_t) A_BOLD, NULL);

		if (opt_nums) {
		    sprintf(numbered, "{%02X}", i);
		    if (opt_xchr) {
			make_fullwidth_text(buffer, numbered);
		    } else {
			make_narrow_text(buffer, numbered);
		    }
		}
		addnwstr(buffer, width);
		attr_set(A_NORMAL, 0, NULL);

		if ((i % per_row) == 0 && (i % COLORS) == 0) {
		    show_color_name(row, 0, i / COLORS, opt_wide);
		}
		++shown;
	    } else if (shown) {
		break;
	    }
	}

	switch (c = wGetchar(stdscr)) {
	case 'a':
	    opt_acsc = FALSE;
	    break;
	case 'A':
	    opt_acsc = TRUE;
	    break;
	case 'b':
	    opt_bold = FALSE;
	    break;
	case 'B':
	    opt_bold = TRUE;
	    break;
	case 'n':
	    opt_nums = FALSE;
	    break;
	case 'N':
	    opt_nums = TRUE;
	    break;
	case case_QUIT:
	    done = TRUE;
	    continue;
	case 'w':
	    set_color_test(opt_wide, FALSE);
	    break;
	case 'W':
	    set_color_test(opt_wide, TRUE);
	    break;
	case 'x':
	    opt_xchr = FALSE;
	    break;
	case 'X':
	    opt_xchr = TRUE;
	    break;
	case CTRL('p'):
	case KEY_UP:
	    if (base_row <= 0) {
		beep();
	    } else {
		base_row -= 1;
	    }
	    break;
	case CTRL('n'):
	case KEY_DOWN:
	    if (base_row + page_size >= row_limit) {
		beep();
	    } else {
		base_row += 1;
	    }
	    break;
	case CTRL('b'):
	case KEY_PREVIOUS:
	case KEY_PPAGE:
	    if (base_row <= 0) {
		beep();
	    } else {
		base_row -= (page_size - 1);
		if (base_row < 0)
		    base_row = 0;
	    }
	    break;
	case CTRL('f'):
	case KEY_NEXT:
	case KEY_NPAGE:
	    if (base_row + page_size >= row_limit) {
		beep();
	    } else {
		base_row += page_size - 1;
		if (base_row + page_size >= row_limit) {
		    base_row = row_limit - page_size - 1;
		}
	    }
	    break;
	case '?':
	    if ((helpwin = newwin(LINES - 1, COLS - 2, 0, 0)) != 0) {
		box(helpwin, 0, 0);
		color_legend(helpwin, TRUE);
		wGetchar(helpwin);
		delwin(helpwin);
	    }
	    break;
	default:
	    beep();
	    continue;
	}
    }

    erase();
    endwin();
}
#endif /* USE_WIDEC_SUPPORT */

static void
change_color(short current, int field, int value, int usebase)
{
    short red, green, blue;

    color_content(current, &red, &green, &blue);

    switch (field) {
    case 0:
	red = (short) (usebase ? (red + value) : value);
	break;
    case 1:
	green = (short) (usebase ? (green + value) : value);
	break;
    case 2:
	blue = (short) (usebase ? (blue + value) : value);
	break;
    }

    if (init_color(current, red, green, blue) == ERR)
	beep();
}

static void
init_all_colors(void)
{
    short c;

    for (c = 0; c < COLORS; ++c)
	init_color(c,
		   all_colors[c].red,
		   all_colors[c].green,
		   all_colors[c].blue);
}

#define scaled_rgb(n) ((255 * (n)) / 1000)

static void
color_edit(void)
/* display the color test pattern, without trying to edit colors */
{
    int i;
    int current = 0;
    int this_c = 0, value = 0, field = 0;
    int last_c;
    int top_color = 0;
    int page_size = (LINES - 6);

    init_all_colors();
    refresh();

    for (i = 0; i < max_colors; i++)
	init_pair((short) i, (short) COLOR_WHITE, (short) i);

    mvprintw(LINES - 2, 0, "Number: %d", value);

    do {
	short red, green, blue;

	attron(A_BOLD);
	mvaddstr(0, 20, "Color RGB Value Editing");
	attroff(A_BOLD);

	for (i = (short) top_color;
	     (i - top_color < page_size)
	     && (i < max_colors); i++) {
	    char numeric[80];

	    sprintf(numeric, "[%d]", i);
	    mvprintw(2 + i - top_color, 0, "%c %-8s:",
		     (i == current ? '>' : ' '),
		     (i < (int) SIZEOF(the_color_names)
		      ? the_color_names[i] : numeric));
	    attrset(COLOR_PAIR(i));
	    addstr("        ");
	    attrset(A_NORMAL);

	    color_content((short) i, &red, &green, &blue);
	    addstr("   R = ");
	    if (current == i && field == 0)
		attron(A_STANDOUT);
	    printw("%04d", red);
	    if (current == i && field == 0)
		attrset(A_NORMAL);
	    addstr(", G = ");
	    if (current == i && field == 1)
		attron(A_STANDOUT);
	    printw("%04d", green);
	    if (current == i && field == 1)
		attrset(A_NORMAL);
	    addstr(", B = ");
	    if (current == i && field == 2)
		attron(A_STANDOUT);
	    printw("%04d", blue);
	    if (current == i && field == 2)
		attrset(A_NORMAL);
	    attrset(A_NORMAL);
	    printw(" ( %3d %3d %3d )",
		   scaled_rgb(red),
		   scaled_rgb(green),
		   scaled_rgb(blue));
	}

	mvaddstr(LINES - 3, 0,
		 "Use up/down to select a color, left/right to change fields.");
	mvaddstr(LINES - 2, 0,
		 "Modify field by typing nnn=, nnn-, or nnn+.  ? for help.");

	move(2 + current - top_color, 0);

	last_c = this_c;
	this_c = Getchar();
	if (this_c < 256 && isdigit(this_c) && !isdigit(last_c))
	    value = 0;

	switch (this_c) {
	case CTRL('b'):
	case KEY_PPAGE:
	    if (current > 0)
		current -= (page_size - 1);
	    else
		beep();
	    break;

	case CTRL('f'):
	case KEY_NPAGE:
	    if (current < (max_colors - 1))
		current += (page_size - 1);
	    else
		beep();
	    break;

	case CTRL('p'):
	case KEY_UP:
	    current = (current == 0 ? (max_colors - 1) : current - 1);
	    break;

	case CTRL('n'):
	case KEY_DOWN:
	    current = (current == (max_colors - 1) ? 0 : current + 1);
	    break;

	case KEY_RIGHT:
	    field = (field == 2 ? 0 : field + 1);
	    break;

	case KEY_LEFT:
	    field = (field == 0 ? 2 : field - 1);
	    break;

	case '0':
	case '1':
	case '2':
	case '3':
	case '4':
	case '5':
	case '6':
	case '7':
	case '8':
	case '9':
	    value = value * 10 + (this_c - '0');
	    break;

	case '+':
	    change_color((short) current, field, value, 1);
	    break;

	case '-':
	    change_color((short) current, field, -value, 1);
	    break;

	case '=':
	    change_color((short) current, field, value, 0);
	    break;

	case '?':
	    erase();
	    P("                      RGB Value Editing Help");
	    P("");
	    P("You are in the RGB value editor.  Use the arrow keys to select one of");
	    P("the fields in one of the RGB triples of the current colors; the one");
	    P("currently selected will be reverse-video highlighted.");
	    P("");
	    P("To change a field, enter the digits of the new value; they are echoed");
	    P("as entered.  Finish by typing `='.  The change will take effect instantly.");
	    P("To increment or decrement a value, use the same procedure, but finish");
	    P("with a `+' or `-'.");
	    P("");
	    P("Press 'm' to invoke the top-level menu with the current color settings.");
	    P("To quit, do ESC");

	    Pause();
	    erase();
	    break;

	case 'm':
	    endwin();
	    main_menu(FALSE);
	    refresh();
	    break;

	case case_QUIT:
	    break;

	default:
	    beep();
	    break;
	}

	if (current < 0)
	    current = 0;
	if (current >= max_colors)
	    current = max_colors - 1;
	if (current < top_color)
	    top_color = current;
	if (current - top_color >= page_size)
	    top_color = current - (page_size - 1);

	mvprintw(LINES - 1, 0, "Number: %d", value);
	clrtoeol();
    } while
	(!isQuit(this_c));

    erase();

    /*
     * ncurses does not reset each color individually when calling endwin().
     */
    init_all_colors();

    endwin();
}

/****************************************************************************
 *
 * Soft-key label test
 *
 ****************************************************************************/

#if USE_SOFTKEYS

#define SLK_HELP 17
#define SLK_WORK (SLK_HELP + 3)

static void
slk_help(void)
{
    static const char *table[] =
    {
	"Available commands are:"
	,""
	,"^L         -- repaint this message and activate soft keys"
	,"a/d        -- activate/disable soft keys"
	,"c          -- set centered format for labels"
	,"l          -- set left-justified format for labels"
	,"r          -- set right-justified format for labels"
	,"[12345678] -- set label; labels are numbered 1 through 8"
	,"e          -- erase stdscr (should not erase labels)"
	,"s          -- test scrolling of shortened screen"
#if HAVE_SLK_COLOR
	,"F/B        -- cycle through foreground/background colors"
#endif
	,"ESC        -- return to main menu"
	,""
	,"Note: if activating the soft keys causes your terminal to scroll up"
	,"one line, your terminal auto-scrolls when anything is written to the"
	,"last screen position.  The ncurses code does not yet handle this"
	,"gracefully."
    };
    unsigned j;

    move(2, 0);
    for (j = 0; j < SIZEOF(table); ++j) {
	P(table[j]);
    }
    refresh();
}

#if HAVE_SLK_COLOR
static void
call_slk_color(short fg, short bg)
{
    init_pair(1, bg, fg);
    slk_color(1);
    mvprintw(SLK_WORK, 0, "Colors %d/%d\n", fg, bg);
    clrtoeol();
    refresh();
}
#endif

static void
slk_test(void)
/* exercise the soft keys */
{
    int c, fmt = 1;
    char buf[9];
    char *s;
#if HAVE_SLK_COLOR
    short fg = COLOR_BLACK;
    short bg = COLOR_WHITE;
#endif

    c = CTRL('l');
#if HAVE_SLK_COLOR
    if (use_colors) {
	call_slk_color(fg, bg);
    }
#endif

    do {
	move(0, 0);
	switch (c) {
	case CTRL('l'):
	    erase();
	    attron(A_BOLD);
	    mvaddstr(0, 20, "Soft Key Exerciser");
	    attroff(A_BOLD);

	    slk_help();
	    /* fall through */

	case 'a':
	    slk_restore();
	    break;

	case 'e':
	    wclear(stdscr);
	    break;

	case 's':
	    mvprintw(SLK_WORK, 0, "Press Q to stop the scrolling-test: ");
	    while ((c = Getchar()) != 'Q' && (c != ERR))
		addch((chtype) c);
	    break;

	case 'd':
	    slk_clear();
	    break;

	case 'l':
	    fmt = 0;
	    break;

	case 'c':
	    fmt = 1;
	    break;

	case 'r':
	    fmt = 2;
	    break;

	case '1':
	case '2':
	case '3':
	case '4':
	case '5':
	case '6':
	case '7':
	case '8':
	    (void) mvaddstr(SLK_WORK, 0, "Please enter the label value: ");
	    strcpy(buf, "");
	    if ((s = slk_label(c - '0')) != 0) {
		strncpy(buf, s, 8);
	    }
	    wGetstring(stdscr, buf, 8);
	    slk_set((c - '0'), buf, fmt);
	    slk_refresh();
	    move(SLK_WORK, 0);
	    clrtobot();
	    break;

	case case_QUIT:
	    goto done;

#if HAVE_SLK_COLOR
	case 'F':
	    if (use_colors) {
		fg = (short) ((fg + 1) % COLORS);
		call_slk_color(fg, bg);
	    }
	    break;
	case 'B':
	    if (use_colors) {
		bg = (short) ((bg + 1) % COLORS);
		call_slk_color(fg, bg);
	    }
	    break;
#endif
#if defined(NCURSES_VERSION) && defined(KEY_RESIZE) && HAVE_WRESIZE
	case KEY_RESIZE:
	    wnoutrefresh(stdscr);
	    break;
#endif

	default:
	    beep();
	}
    } while (!isQuit(c = Getchar()));

  done:
    slk_clear();
    erase();
    endwin();
}

#if USE_WIDEC_SUPPORT
#define SLKLEN 8
static void
wide_slk_test(void)
/* exercise the soft keys */
{
    int c, fmt = 1;
    wchar_t buf[SLKLEN + 1];
    char *s;
    short fg = COLOR_BLACK;
    short bg = COLOR_WHITE;

    c = CTRL('l');
    if (use_colors) {
	call_slk_color(fg, bg);
    }
    do {
	move(0, 0);
	switch (c) {
	case CTRL('l'):
	    erase();
	    attr_on(WA_BOLD, NULL);
	    mvaddstr(0, 20, "Soft Key Exerciser");
	    attr_off(WA_BOLD, NULL);

	    slk_help();
	    /* fall through */

	case 'a':
	    slk_restore();
	    break;

	case 'e':
	    wclear(stdscr);
	    break;

	case 's':
	    mvprintw(SLK_WORK, 0, "Press Q to stop the scrolling-test: ");
	    while ((c = Getchar()) != 'Q' && (c != ERR))
		addch((chtype) c);
	    break;

	case 'd':
	    slk_clear();
	    break;

	case 'l':
	    fmt = 0;
	    break;

	case 'c':
	    fmt = 1;
	    break;

	case 'r':
	    fmt = 2;
	    break;

	case '1':
	case '2':
	case '3':
	case '4':
	case '5':
	case '6':
	case '7':
	case '8':
	    (void) mvaddstr(SLK_WORK, 0, "Please enter the label value: ");
	    *buf = 0;
	    if ((s = slk_label(c - '0')) != 0) {
		char *temp = strdup(s);
		size_t used = strlen(temp);
		size_t want = SLKLEN;
		size_t test;
#ifndef state_unused
		mbstate_t state;
#endif

		buf[0] = L'\0';
		while (want > 0 && used != 0) {
		    const char *base = s;
		    reset_mbytes(state);
		    test = count_mbytes(base, 0, &state);
		    if (test == (size_t) -1) {
			temp[--used] = 0;
		    } else if (test > want) {
			temp[--used] = 0;
		    } else {
			reset_mbytes(state);
			trans_mbytes(buf, base, want, &state);
			break;
		    }
		}
		free(temp);
	    }
	    wGet_wstring(stdscr, buf, SLKLEN);
	    slk_wset((c - '0'), buf, fmt);
	    slk_refresh();
	    move(SLK_WORK, 0);
	    clrtobot();
	    break;

	case case_QUIT:
	    goto done;

	case 'F':
	    if (use_colors) {
		fg = (short) ((fg + 1) % COLORS);
		call_slk_color(fg, bg);
	    }
	    break;
	case 'B':
	    if (use_colors) {
		bg = (short) ((bg + 1) % COLORS);
		call_slk_color(fg, bg);
	    }
	    break;
#if defined(NCURSES_VERSION) && defined(KEY_RESIZE) && HAVE_WRESIZE
	case KEY_RESIZE:
	    wnoutrefresh(stdscr);
	    break;
#endif
	default:
	    beep();
	}
    } while (!isQuit(c = Getchar()));

  done:
    slk_clear();
    erase();
    endwin();
}
#endif
#endif /* SLK_INIT */

/****************************************************************************
 *
 * Alternate character-set stuff
 *
 ****************************************************************************/
/* *INDENT-OFF* */
static struct {
    chtype attr;
    const char *name;
} attrs_to_cycle[] = {
    { A_NORMAL,		"normal" },
    { A_BOLD,		"bold" },
    { A_REVERSE,	"reverse" },
    { A_UNDERLINE,	"underline" },
};
/* *INDENT-ON* */

static bool
cycle_attr(int ch, unsigned *at_code, chtype *attr)
{
    bool result = TRUE;

    switch (ch) {
    case 'v':
	if ((*at_code += 1) >= SIZEOF(attrs_to_cycle))
	    *at_code = 0;
	break;
    case 'V':
	if (*at_code == 1)
	    *at_code = SIZEOF(attrs_to_cycle) - 1;
	else
	    *at_code -= 1;
	break;
    default:
	result = FALSE;
	break;
    }
    if (result)
	*attr = attrs_to_cycle[*at_code].attr;
    return result;
}

static bool
cycle_colors(int ch, int *fg, int *bg, short *pair)
{
    bool result = FALSE;

    if (use_colors) {
	result = TRUE;
	switch (ch) {
	case 'F':
	    if ((*fg -= 1) < 0)
		*fg = COLORS - 1;
	    break;
	case 'f':
	    if ((*fg += 1) >= COLORS)
		*fg = 0;
	    break;
	case 'B':
	    if ((*bg -= 1) < 0)
		*bg = COLORS - 1;
	    break;
	case 'b':
	    if ((*bg += 1) >= COLORS)
		*bg = 0;
	    break;
	default:
	    result = FALSE;
	    break;
	}
	if (result) {
	    *pair = (short) (*fg != COLOR_BLACK || *bg != COLOR_BLACK);
	    if (*pair != 0) {
		*pair = 1;
		if (init_pair(*pair, (short) *fg, (short) *bg) == ERR) {
		    result = FALSE;
		}
	    }
	}
    }
    return result;
}

/* ISO 6429:  codes 0x80 to 0x9f may be control characters that cause the
 * terminal to perform functions.  The remaining codes can be graphic.
 */
static void
show_upper_chars(unsigned first, int repeat, attr_t attr, short pair)
{
    bool C1 = (first == 128);
    unsigned code;
    unsigned last = first + 31;
    int reply;

    erase();
    attron(A_BOLD);
    mvprintw(0, 20, "Display of %s Character Codes %d to %d",
	     C1 ? "C1" : "GR", first, last);
    attroff(A_BOLD);
    refresh();

    for (code = first; code <= last; code++) {
	int count = repeat;
	int row = 2 + ((int) (code - first) % 16);
	int col = ((int) (code - first) / 16) * COLS / 2;
	char tmp[80];
	sprintf(tmp, "%3u (0x%x)", code, code);
	mvprintw(row, col, "%*s: ", COLS / 4, tmp);

	do {
	    if (C1)
		nodelay(stdscr, TRUE);
	    echochar(code | attr | COLOR_PAIR(pair));
	    if (C1) {
		/* (yes, this _is_ crude) */
		while ((reply = Getchar()) != ERR) {
		    addch(UChar(reply));
		    napms(10);
		}
		nodelay(stdscr, FALSE);
	    }
	} while (--count > 0);
    }
}

#define PC_COLS 4

static void
show_pc_chars(int repeat, attr_t attr, short pair)
{
    unsigned code;

    erase();
    attron(A_BOLD);
    mvprintw(0, 20, "Display of PC Character Codes");
    attroff(A_BOLD);
    refresh();

    for (code = 0; code < 16; ++code) {
	mvprintw(2, (int) code * PC_COLS + 8, "%X", code);
    }
    for (code = 0; code < 256; code++) {
	int count = repeat;
	int row = 3 + (int) (code / 16) + (code >= 128);
	int col = 8 + (int) (code % 16) * PC_COLS;
	if ((code % 16) == 0)
	    mvprintw(row, 0, "0x%02x:", code);
	move(row, col);
	do {
	    switch (code) {
	    case '\n':
	    case '\r':
	    case '\b':
	    case '\f':
	    case '\033':
	    case 0x9b:
		/*
		 * Skip the ones that do not work.
		 */
		break;
	    default:
		addch(code | A_ALTCHARSET | attr | COLOR_PAIR(pair));
		break;
	    }
	} while (--count > 0);
    }
}

static void
show_box_chars(int repeat, attr_t attr, short pair)
{
    (void) repeat;
    attr |= COLOR_PAIR(pair);

    erase();
    attron(A_BOLD);
    mvaddstr(0, 20, "Display of the ACS Line-Drawing Set");
    attroff(A_BOLD);
    refresh();
    box(stdscr, 0, 0);
    /* *INDENT-OFF* */
    mvhline(LINES / 2, 0,        ACS_HLINE | attr, COLS);
    mvvline(0,         COLS / 2, ACS_VLINE | attr, LINES);
    mvaddch(0,         COLS / 2, ACS_TTEE | attr);
    mvaddch(LINES / 2, COLS / 2, ACS_PLUS | attr);
    mvaddch(LINES - 1, COLS / 2, ACS_BTEE | attr);
    mvaddch(LINES / 2, 0,        ACS_LTEE | attr);
    mvaddch(LINES / 2, COLS - 1, ACS_RTEE | attr);
    /* *INDENT-ON* */

}

static int
show_1_acs(int n, int repeat, const char *name, chtype code)
{
    const int height = 16;
    int row = 2 + (n % height);
    int col = (n / height) * COLS / 2;

    mvprintw(row, col, "%*s : ", COLS / 4, name);
    do {
	addch(code);
    } while (--repeat > 0);
    return n + 1;
}

static void
show_acs_chars(int repeat, attr_t attr, short pair)
/* display the ACS character set */
{
    int n;

#define BOTH(name