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menu_sys.def revision 1.19
      1 /*	$NetBSD: menu_sys.def,v 1.19 1999/06/20 02:07:18 cgd Exp $	*/
      2 
      3 /*
      4  * Copyright 1997 Piermont Information Systems Inc.
      5  * All rights reserved.
      6  *
      7  * Written by Philip A. Nelson for Piermont Information Systems Inc.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *      This product includes software develooped for the NetBSD Project by
     20  *      Piermont Information Systems Inc.
     21  * 4. The name of Piermont Information Systems Inc. may not be used to endorse
     22  *    or promote products derived from this software without specific prior
     23  *    written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY PIERMONT INFORMATION SYSTEMS INC. ``AS IS''
     26  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     28  * ARE DISCLAIMED. IN NO EVENT SHALL PIERMONT INFORMATION SYSTEMS INC. BE
     29  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     35  * THE POSSIBILITY OF SUCH DAMAGE.
     36  *
     37  */
     38 
     39 /* menu_sys.defs -- Menu system standard routines. */
     40 
     41 #include <string.h>
     42 #include <ctype.h>
     43 
     44 #define REQ_EXECUTE    1000
     45 #define REQ_NEXT_ITEM  1001
     46 #define REQ_PREV_ITEM  1002
     47 #define REQ_REDISPLAY  1003
     48 #define REQ_SCROLLDOWN 1004
     49 #define REQ_SCROLLUP   1005
     50 #define REQ_HELP       1006
     51 
     52 /* Multiple key support */
     53 #define KEYSEQ_FIRST       256
     54 #define KEYSEQ_DOWN_ARROW  256
     55 #define KEYSEQ_UP_ARROW    257
     56 #define KEYSEQ_LEFT_ARROW  258
     57 #define KEYSEQ_RIGHT_ARROW 259
     58 #define KEYSEQ_PAGE_DOWN   260
     59 #define KEYSEQ_PAGE_UP     261
     60 
     61 struct keyseq {
     62 	char *termcap_name;
     63 	char *chars;
     64 	int  numchars;
     65 	int  keyseq_val;
     66 	struct keyseq *next;
     67 };
     68 
     69 /* keypad and other definitions */
     70 struct keyseq _mc_key_seq[] = {
     71 	/* Cludge for xterm ... */
     72 	{  NULL, "\033[B", 0, KEYSEQ_DOWN_ARROW, NULL },
     73 	{  NULL, "\033[D", 0, KEYSEQ_LEFT_ARROW, NULL },
     74 	{  NULL, "\033[C", 0, KEYSEQ_RIGHT_ARROW, NULL },
     75 	{  NULL, "\033[A", 0, KEYSEQ_UP_ARROW, NULL },
     76 	/* Termcap defined */
     77 	{ "kd", NULL, 0, KEYSEQ_DOWN_ARROW, NULL },
     78 	{ "kl", NULL, 0, KEYSEQ_LEFT_ARROW, NULL },
     79 	{ "kr", NULL, 0, KEYSEQ_RIGHT_ARROW, NULL },
     80 	{ "ku", NULL, 0, KEYSEQ_UP_ARROW, NULL },
     81 	{ "kf", NULL, 0, KEYSEQ_PAGE_DOWN, NULL },  /* scroll forward */
     82 	{ "kN", NULL, 0, KEYSEQ_PAGE_DOWN, NULL },  /* next page */
     83 	{ "kP", NULL, 0, KEYSEQ_PAGE_UP, NULL },    /* scroll backward */
     84 	{ "kR", NULL, 0, KEYSEQ_PAGE_UP, NULL },    /* prev page */
     85 	/* other definitions */
     86 	{ NULL, "\033v", 0, KEYSEQ_PAGE_UP, NULL },   /* ESC-v */
     87 	{ NULL, "\026", 0, KEYSEQ_PAGE_DOWN, NULL },  /* CTL-v */
     88 };
     89 
     90 int _mc_num_key_seq = sizeof(_mc_key_seq) / sizeof(struct keyseq);
     91 struct keyseq *pad_list = NULL;
     92 static char str_area [512];
     93 static char *str_ptr = str_area;
     94 
     95 /* Macros */
     96 #define MAX(x,y) ((x)>(y)?(x):(y))
     97 #define MIN(x,y) ((x)<(y)?(x):(y))
     98 
     99 /* Initialization state. */
    100 static int __menu_init = 0;
    101 int __m_endwin = 0;
    102 static int max_lines = 0, max_cols = 0;
    103 static char *scrolltext = " <: page up, >: page down";
    104 
    105 static menudesc *menus = menu_def;
    106 
    107 #ifdef DYNAMIC_MENUS
    108 static int num_menus  = 0;
    109 static int num_avail  = 0;
    110 #define DYN_INIT_NUM 32
    111 #endif
    112 
    113 /* prototypes for in here! */
    114 static void ins_keyseq (struct keyseq **seq, struct keyseq *ins);
    115 static void init_keyseq (void);
    116 static void init_menu (struct menudesc *m);
    117 static char opt_ch (int op_no);
    118 static void post_menu (struct menudesc *m);
    119 static void process_help (struct menudesc *m, int num);
    120 static void process_req (struct menudesc *m, int num, int req);
    121 static void mbeep (void);
    122 static int menucmd (WINDOW *w);
    123 
    124 #ifndef NULL
    125 #define NULL (void *)0
    126 #endif
    127 
    128 /* menu system processing routines */
    129 
    130 static void mbeep (void)
    131 {
    132 	fprintf (stderr,"\a");
    133 }
    134 
    135 static void ins_keyseq (struct keyseq **seq, struct keyseq *ins)
    136 {
    137 	if (*seq == NULL) {
    138 		ins->next = NULL;
    139 		*seq = ins;
    140 	} else if (ins->numchars <= (*seq)->numchars) {
    141 		ins->next = *seq;
    142 		*seq = ins;
    143 	} else
    144 		ins_keyseq (&(*seq)->next, ins);
    145 }
    146 
    147 static void init_keyseq (void)
    148 {
    149 	int i;
    150 	for (i=0; i<_mc_num_key_seq; i++) {
    151 		if (_mc_key_seq[i].termcap_name)
    152 			_mc_key_seq[i].chars =
    153 				tgetstr (_mc_key_seq[i].termcap_name,
    154 					 &str_ptr);
    155 		if (_mc_key_seq[i].chars != NULL &&
    156 		    (_mc_key_seq[i].numchars = strlen(_mc_key_seq[i].chars))
    157 		    > 0)
    158 			ins_keyseq (&pad_list,&_mc_key_seq[i]);
    159 	}
    160 }
    161 
    162 static int mgetch(WINDOW *w)
    163 {
    164 	static char buf[20];
    165 	static int  num = 0;
    166 	struct keyseq *list = pad_list;
    167 	int i, ret;
    168 
    169 	/* key pad processing */
    170 	while (list) {
    171 		for (i=0; i< list->numchars; i++) {
    172 			if (i >= num)
    173 				buf[num++] = wgetch(w);
    174 			if (buf[i] != list->chars[i])
    175 				break;
    176 		}
    177 		if (i == list->numchars) {
    178 			num = 0;
    179 			return list->keyseq_val;
    180 		}
    181 		list = list->next;
    182 	}
    183 
    184 	ret = buf[0];
    185 	for (i = 0; i < strlen(buf); i++)
    186 		buf[i] = buf[i+1];
    187 	num--;
    188 	return ret;
    189 }
    190 
    191 static int menucmd (WINDOW *w)
    192 {
    193 	int ch;
    194 
    195 	while (TRUE) {
    196 		ch = mgetch(w);
    197 
    198 		switch (ch) {
    199 		case '\n':
    200 			return REQ_EXECUTE;
    201 		case '\016':  /* Contnrol-P */
    202 		case KEYSEQ_DOWN_ARROW:
    203 			return REQ_NEXT_ITEM;
    204 		case '\020':  /* Control-N */
    205 		case KEYSEQ_UP_ARROW:
    206 			return REQ_PREV_ITEM;
    207 		case '\014':  /* Control-L */
    208 		        return REQ_REDISPLAY;
    209 		case '<':
    210 		case '\010':  /* Control-H (backspace) */
    211 		case KEYSEQ_PAGE_UP:
    212 			return REQ_SCROLLUP;
    213 		case '>':
    214 		case ' ':
    215 		case KEYSEQ_PAGE_DOWN:
    216 			return REQ_SCROLLDOWN;
    217 		case '?':
    218 			return REQ_HELP;
    219 		}
    220 
    221 		if (isalpha(ch))
    222 			return (ch);
    223 
    224 		mbeep();
    225 		wrefresh(w);
    226 	}
    227 }
    228 
    229 static void init_menu (struct menudesc *m)
    230 {
    231 	int wmax;
    232 	int hadd, wadd, exithadd;
    233 	int i;
    234 
    235 	hadd = ((m->mopt & MC_NOBOX) ? 0 : 2);
    236 	wadd = ((m->mopt & MC_NOBOX) ? 2 : 4);
    237 
    238 	hadd += strlen(m->title) != 0 ? 2 : 0;
    239 	exithadd = ((m->mopt & MC_NOEXITOPT) ? 0 : 1);
    240 
    241 	wmax = strlen(m->title);
    242 
    243 	/* Calculate h? h == number of visible options. */
    244 	if (m->h == 0) {
    245 		m->h = m->numopts + exithadd;
    246 		if (m->h + m->y + hadd >= max_lines && (m->mopt & MC_SCROLL))
    247 			m->h = max_lines - m->y - hadd ;
    248 	}
    249 
    250 	/* Check window heights and set scrolling */
    251 	if (m->h < m->numopts + exithadd) {
    252 		if (!(m->mopt & MC_SCROLL) || m->h < 3) {
    253 			endwin();
    254 			(void) fprintf (stderr,
    255 				"Window too short for menu \"%s\"\n",
    256 				m->title);
    257 			exit(1);
    258 		}
    259 	} else
    260 		m->mopt &= ~MC_SCROLL;
    261 
    262 	/* check for screen fit */
    263 	if (m->y + m->h + hadd > max_lines) {
    264 		endwin();
    265 		(void) fprintf (stderr,
    266 			"Screen too short for menu \"%s\"\n", m->title);
    267 		exit(1);
    268 
    269 	}
    270 
    271 	/* Calculate w? */
    272 	if (m->w == 0) {
    273 		if (m->mopt & MC_SCROLL)
    274 			wmax = MAX(wmax,strlen(scrolltext));
    275 		for (i=0; i < m->numopts; i++ )
    276 			wmax = MAX(wmax,strlen(m->opts[i].opt_name)+3);
    277 		m->w = wmax;
    278 	}
    279 
    280 	/* check and adjust for screen fit */
    281 	if (m->w + wadd > max_cols) {
    282 		endwin();
    283 		(void) fprintf (stderr,
    284 			"Screen too narrow for menu \"%s\"\n", m->title);
    285 		exit(1);
    286 
    287 	}
    288 	if (m->x + m->w + wadd > max_cols)
    289 		m->x = max_cols - (m->w + wadd);
    290 
    291 	/* Get the windows. */
    292 	m->mw = newwin(m->h+hadd, m->w+wadd, m->y, m->x);
    293 
    294 	if (m->mw == NULL) {
    295 		endwin();
    296 		(void) fprintf (stderr,
    297 			"Could not create window for menu \"%s\"\n", m->title);
    298 		exit(1);
    299 	}
    300 }
    301 
    302 static char opt_ch (int op_no)
    303 {
    304 	char c;
    305 	if (op_no < 25) {
    306 		c = 'a' + op_no;
    307 		if (c >= 'x') c++;
    308 	} else
    309 		c = 'A' + op_no - 25;
    310 	return (char) c;
    311 }
    312 
    313 static void post_menu (struct menudesc *m)
    314 {
    315 	int i;
    316 	int hasbox, cury, maxy, selrow, lastopt;
    317 	int tadd;
    318 	char optstr[5];
    319 
    320 	if (m->mopt & MC_NOBOX) {
    321 		cury = 0;
    322 		maxy = m->h;
    323 		hasbox = 0;
    324 	} else {
    325 		cury = 1;
    326 		maxy = m->h+1;
    327 		hasbox = 1;
    328 	}
    329 
    330 	/* Clear the window */
    331 	wclear (m->mw);
    332 
    333 	tadd = strlen(m->title) ? 2 : 0;
    334 
    335 	if (tadd) {
    336 		mvwaddstr(m->mw, cury, cury, " ");
    337 		mvwaddstr(m->mw, cury, cury + 1, m->title);
    338 		cury += 2;
    339 		maxy += 2;
    340 	}
    341 
    342 	/* Set defaults, calculate lastopt. */
    343 	selrow = -1;
    344 	if (m->mopt & MC_SCROLL) {
    345 		lastopt = MIN(m->numopts, m->topline+m->h-1);
    346 		maxy -= 1;
    347 	} else
    348 		lastopt = m->numopts;
    349 
    350 	for (i=m->topline; i<lastopt; i++, cury++) {
    351 		if (m->cursel == i) {
    352 			mvwaddstr (m->mw, cury, hasbox, ">");
    353 			wstandout(m->mw);
    354 			selrow = cury;
    355 		} else
    356 			mvwaddstr (m->mw, cury, hasbox, " ");
    357 		(void) sprintf (optstr, "%c: ", opt_ch(i));
    358 		waddstr (m->mw, optstr);
    359 		waddstr (m->mw, m->opts[i].opt_name);
    360 		if (m->cursel == i)
    361 			wstandend(m->mw);
    362 	}
    363 
    364 	/* Add the exit option. */
    365 	if (!(m->mopt & MC_NOEXITOPT) && cury < maxy) {
    366 		if (m->cursel >= m->numopts) {
    367 			mvwaddstr (m->mw, cury, hasbox, ">");
    368 			wstandout(m->mw);
    369 			selrow = cury;
    370 		} else
    371 			mvwaddstr (m->mw, cury, hasbox, " ");
    372 		waddstr (m->mw, "x: ");
    373 		waddstr (m->mw, m->exitstr);
    374 		if (m->cursel >= m->numopts)
    375 			wstandend(m->mw);
    376 		cury++;
    377 	}
    378 
    379 	/* Add the scroll line */
    380 	if (m->mopt & MC_SCROLL) {
    381 		mvwaddstr (m->mw, cury, hasbox, scrolltext);
    382 		if (selrow < 0)
    383 			selrow = cury;
    384 	}
    385 
    386 	/* Add the box. */
    387 	if (!(m->mopt & MC_NOBOX))
    388 		box(m->mw, '*', '*');
    389 
    390 	wmove(m->mw, selrow, hasbox);
    391 }
    392 
    393 static void process_help (struct menudesc *m, int num)
    394 {
    395 	char *help = m->helpstr;
    396 	int lineoff = 0;
    397 	int curoff = 0;
    398 	int again;
    399 	int winin;
    400 
    401 	/* Is there help? */
    402 	if (!help) {
    403 		mbeep();
    404 		return;
    405 	}
    406 
    407 	/* Display the help information. */
    408 	do {
    409 		if (lineoff < curoff) {
    410 			help = m->helpstr;
    411 			curoff = 0;
    412 		}
    413 		while (*help && curoff < lineoff) {
    414 			if (*help == '\n')
    415 				curoff++;
    416 			help++;
    417 		}
    418 
    419 		wclear(stdscr);
    420 		mvwaddstr (stdscr, 0, 0,
    421 			"Help: exit: x,  page up: u <, page down: d >");
    422 		mvwaddstr (stdscr, 2, 0, help);
    423 		wmove (stdscr, 1, 0);
    424 	  	wrefresh(stdscr);
    425 
    426 		do {
    427 			winin = mgetch(stdscr);
    428 			if (winin < KEYSEQ_FIRST)
    429 				winin = tolower(winin);
    430 			again = 0;
    431 			switch (winin) {
    432 				case '<':
    433 				case 'u':
    434 				case KEYSEQ_UP_ARROW:
    435 				case KEYSEQ_LEFT_ARROW:
    436 				case KEYSEQ_PAGE_UP:
    437 					if (lineoff)
    438 						lineoff -= max_lines - 2;
    439 					else
    440 						again = 1;
    441 					break;
    442 				case '>':
    443 				case 'd':
    444 				case KEYSEQ_DOWN_ARROW:
    445 				case KEYSEQ_RIGHT_ARROW:
    446 				case KEYSEQ_PAGE_DOWN:
    447 					if (*help)
    448 						lineoff += max_lines - 2;
    449 					else
    450 						again = 1;
    451 					break;
    452 				case 'q':
    453 					break;
    454 				case 'x':
    455 					winin = 'q';
    456 					break;
    457 				default:
    458 					again = 1;
    459 			}
    460 			if (again)
    461 				mbeep();
    462 		} while (again);
    463 	} while (winin != 'q');
    464 
    465 	/* Restore current menu */
    466 	wclear(stdscr);
    467 	wrefresh(stdscr);
    468 	if (m->post_act)
    469 		(*m->post_act)();
    470 }
    471 
    472 static void process_req (struct menudesc *m, int num, int req)
    473 {
    474 	int ch;
    475 	int hasexit = (m->mopt & MC_NOEXITOPT ? 0 : 1 );
    476 	int refresh = 0;
    477 	int scroll_sel = 0;
    478 
    479 	if (req == REQ_EXECUTE)
    480 		return;
    481 
    482 	else if (req == REQ_NEXT_ITEM) {
    483 		if (m->cursel < m->numopts + hasexit - 1) {
    484 			m->cursel++;
    485 			scroll_sel = 1;
    486 			refresh = 1;
    487 			if (m->mopt & MC_SCROLL &&
    488 			    m->cursel >= m->topline + m->h -1 )
    489 				m->topline += 1;
    490 		} else
    491 			mbeep();
    492 
    493 	} else if (req == REQ_PREV_ITEM) {
    494 		if (m->cursel > 0) {
    495 			m->cursel--;
    496 			scroll_sel = 1;
    497 			refresh = 1;
    498 			if (m->cursel < m->topline )
    499 				m->topline -= 1;
    500 		} else
    501 			mbeep();
    502 
    503 	} else if (req == REQ_REDISPLAY) {
    504 		wclear(stdscr);
    505 		wrefresh(stdscr);
    506 		if (m->post_act)
    507 			(*m->post_act)();
    508 		refresh = 1;
    509 
    510 	} else if (req == REQ_HELP) {
    511 		process_help (m, num);
    512 		refresh = 1;
    513 
    514 	} else if (req == REQ_SCROLLUP) {
    515 		if (!(m->mopt & MC_SCROLL))
    516 			mbeep();
    517 		else if (m->topline == 0)
    518 			mbeep();
    519 		else {
    520 			m->topline = MAX(0,m->topline-m->h+1);
    521 			wclear (m->mw);
    522 			refresh = 1;
    523 		}
    524 
    525 	} else if (req == REQ_SCROLLDOWN) {
    526 		if (!(m->mopt & MC_SCROLL))
    527 			mbeep();
    528 		else if (m->topline + m->h - 1 >= m->numopts + hasexit)
    529 			mbeep();
    530 		else {
    531 			m->topline = MIN(m->topline+m->h-1,
    532 					 m->numopts+hasexit-m->h+1);
    533 			wclear (m->mw);
    534 			refresh = 1;
    535 		}
    536 
    537 	} else {
    538 		ch = req;
    539 		if (ch == 'x' && hasexit) {
    540 			m->cursel = m->numopts;
    541 			scroll_sel = 1;
    542 			refresh = 1;
    543 		} else {
    544 			if (ch > 'z')
    545 				ch = 255;
    546 			if (ch >= 'a') {
    547 				if (ch > 'x') ch--;
    548 				ch = ch - 'a';
    549 			} else
    550 				ch = 25 + ch - 'A';
    551 			if (ch < 0 || ch >= m->numopts)
    552 				mbeep();
    553 			else {
    554 				m->cursel = ch;
    555 				scroll_sel = 1;
    556 				refresh = 1;
    557 			}
    558 		}
    559 	}
    560 
    561 	if (m->mopt & MC_SCROLL && scroll_sel) {
    562 		while (m->cursel >= m->topline + m->h -1 )
    563 			m->topline = MIN(m->topline+m->h-1,
    564 					 m->numopts+hasexit-m->h+1);
    565 		while (m->cursel < m->topline)
    566 			m->topline = MAX(0,m->topline-m->h+1);
    567 	}
    568 
    569 	if (refresh) {
    570 		post_menu (m);
    571 		wrefresh (m->mw);
    572 	}
    573 }
    574 
    575 int menu_init (void)
    576 {
    577 
    578 	if (__menu_init)
    579 		return 0;
    580 
    581 	if (initscr() == NULL)
    582 		return 1;
    583 
    584 	cbreak();
    585 	noecho();
    586 	max_lines = getmaxy(stdscr);
    587 	max_cols = getmaxx(stdscr);
    588 	init_keyseq();
    589 #ifdef DYNAMIC_MENUS
    590 	num_menus = DYN_INIT_NUM;
    591 	while (num_menus < DYN_MENU_START)
    592 		num_menus *= 2;
    593 	menus = (menudesc *) malloc(sizeof(menudesc)*num_menus);
    594 	if (menus == NULL)
    595 		return 2;
    596 	(void) memset ((void *)menus, 0, sizeof(menudesc)*num_menus);
    597 	(void) memcpy ((void *)menus, (void *)menu_def,
    598 		sizeof(menudesc)*DYN_MENU_START);
    599 	 num_avail = num_menus - DYN_MENU_START;
    600 #endif
    601 
    602 	__menu_init = 1;
    603 	return (0);
    604 }
    605 
    606 void process_menu (int num)
    607 {
    608 	int sel = 0;
    609 	int req, done;
    610 	int last_num;
    611 
    612 	struct menudesc *m;
    613 
    614 	m = &menus[num];
    615 
    616 	done = FALSE;
    617 
    618 	/* Initialize? */
    619 	if (menu_init()) {
    620 		__menu_initerror();
    621 		return;
    622 	}
    623 
    624 	if (__m_endwin) {
    625      		wclear(stdscr);
    626 		wrefresh(stdscr);
    627 		__m_endwin = 0;
    628 	}
    629 	if (m->mw == NULL)
    630 		init_menu (m);
    631 
    632 	/* Always preselect option 0 and display from 0! */
    633 	m->cursel = 0;
    634 	m->topline = 0;
    635 
    636 	while (!done) {
    637 		last_num = num;
    638 		if (__m_endwin) {
    639 			wclear(stdscr);
    640 			wrefresh(stdscr);
    641 			__m_endwin = 0;
    642 		}
    643 		/* Process the display action */
    644 		if (m->post_act)
    645 			(*m->post_act)();
    646 		post_menu (m);
    647 		wrefresh (m->mw);
    648 
    649 		while ((req = menucmd (m->mw)) != REQ_EXECUTE)
    650 			process_req (m, num, req);
    651 
    652 		sel = m->cursel;
    653 		wclear (m->mw);
    654 		wrefresh (m->mw);
    655 
    656 		/* Process the items */
    657 		if (sel < m->numopts) {
    658 			if (m->opts[sel].opt_flags & OPT_ENDWIN) {
    659 				endwin();
    660 				__m_endwin = 1;
    661 			}
    662 			if (m->opts[sel].opt_action)
    663 				done = (*m->opts[sel].opt_action)();
    664 			if (m->opts[sel].opt_menu != -1) {
    665 				if (m->opts[sel].opt_flags & OPT_SUB)
    666 					process_menu (m->opts[sel].opt_menu);
    667 				else
    668 					num = m->opts[sel].opt_menu;
    669 			}
    670 
    671                         if (m->opts[sel].opt_flags & OPT_EXIT)
    672                                 done = TRUE;
    673 
    674 		} else
    675 			done = TRUE;
    676 
    677 		/* Reselect m just in case */
    678 		if (num != last_num) {
    679 			m = &menus[num];
    680 
    681 			/* Initialize? */
    682 			if (m->mw == NULL)
    683 				init_menu (m);
    684 			if (m->post_act)
    685 				(*m->post_act)();
    686 		}
    687 	}
    688 
    689 	/* Process the exit action */
    690 	if (m->exit_act)
    691 		(*m->exit_act)();
    692 }
    693 
    694 /* Control L is end of standard routines, remaining only for dynamic. */
    696 
    697 /* Beginning of routines for dynamic menus. */
    698 
    699 /* local prototypes */
    700 static int double_menus (void);
    701 
    702 static int double_menus (void)
    703 {
    704 	menudesc *temp;
    705 
    706 	temp  = (menudesc *) malloc(sizeof(menudesc)*num_menus*2);
    707 	if (temp == NULL)
    708 		return 0;
    709 	(void) memset ((void *)temp, 0,
    710 		sizeof(menudesc)*num_menus*2);
    711 	(void) memcpy ((void *)temp, (void *)menus,
    712 		sizeof(menudesc)*num_menus);
    713 	free (menus);
    714 	menus = temp;
    715 	num_avail = num_menus;
    716 	num_menus *= 2;
    717 
    718 	return 1;
    719 }
    720 
    721 int new_menu (char * title, menu_ent * opts, int numopts,
    722         int x, int y, int h, int w, int mopt,
    723         void (*post_act)(void), void (*exit_act), char * help)
    724 {
    725 	int ix;
    726 
    727 	/* Check for free menu entry. */
    728 	if (num_avail == 0)
    729 		if (!double_menus ())
    730 			return -1;
    731 
    732 	/* Find free menu entry. */
    733 	for (ix = DYN_MENU_START; ix < num_menus && menus[ix].mopt & MC_VALID;
    734 		ix++) /* do  nothing */;
    735 
    736 	/* if ix == num_menus ... panic */
    737 
    738 	/* Set Entries */
    739 	menus[ix].title = title;
    740 	menus[ix].opts = opts;
    741 	menus[ix].numopts = numopts;
    742 	menus[ix].x = x;
    743 	menus[ix].y = y;
    744 	menus[ix].h = h;
    745 	menus[ix].w = w;
    746 	menus[ix].mopt = mopt | MC_VALID;
    747 	menus[ix].post_act = post_act;
    748 	menus[ix].exit_act = exit_act;
    749 	menus[ix].helpstr  = help;
    750 
    751 	init_menu (&menus[ix]);
    752 
    753 	return ix;
    754 }
    755 
    756 void free_menu (int menu_no)
    757 {
    758 	if (menu_no < num_menus) {
    759 		menus[menu_no].mopt &= ~MC_VALID;
    760 		if (menus[menu_no].mw != NULL)
    761 			delwin (menus[menu_no].mw);
    762 	}
    763 }
    764