/* Generate tk script based upon config.in
 *
 * 1995 10 xx	Eric Youngdale
 *	- Version 1.0
 *
 * 1996 01 04	Avery Pennarun
 *	- Aesthetic improvements.
 *	- Bugfixes and more aesthetics.
 *
 * 1996 03 08	Avery Pennarun
 *	- The int and hex config.in commands work right.
 *	- Choice buttons are more user-friendly.
 *	- Disabling a text entry line greys it out properly.
 *	- dep_tristate now works like in Configure. (not pretty)
 *	- No warnings in gcc -Wall. (Fixed some "interesting" bugs.)
 *	- Faster/prettier "Help" lookups.
 *
 * 1996 03 15	Avery Pennarun
 *	- Added new sed script from Axel Boldt to make help even faster.
 *	  (Actually awk is downright slow on some machines.)
 *	- Fixed a bug I introduced into Choice dependencies. Thanks to Robert
 *	  Krawitz for pointing this out.
 *
 * 1996 03 16	Avery Pennarun
 *	- basic "do_make" support added to let sound config work.
 *
 * 1996 03 25	Axel Boldt
 *	- Help now works on "choice" buttons.
 *
 * 1996 04 06	Avery Pennarun
 *	- Improved sound config stuff. (I think it actually works now!)
 *	- Window-resize-limits don't use ugly /usr/lib/tk4.0 hack.
 *	- int/hex work with tk3 again. (The "cget" error.)
 *	- Next/Prev buttons switch between menus. I can't take much credit for
 *	  this; the code was already there, but ifdef'd out for some reason.
 *	  It flickers a lot, but I suspect there's no "easy" fix for that.
 *	- Labels no longer highlight as you move the mouse over them (although
 *	  you can still press them... oh well.)
 *	- Got rid of the last of the literal color settings, to help out
 *	  people with mono X-Windows systems. (Apparently there still are some
 *	  out there!)
 *	- Tabstops seem sensible now.
 *
 * 1996 04 14	Avery Pennarun
 *	- Reduced flicker when creating windows, even with "update idletasks"
 *	  hack.
 *
 * 1997 12 08	Michael Elizabeth Chastain
 *	- Remove sound driver special cases.
 *
 * 1997 11 15	Michael Elizabeth Chastain
 *	- For choice buttons, write values for all options, not just the chosen
 *	  one. This is compatible with 'make config' and 'make oldconfig', and
 *	  is needed so smart-config dependencies work if the user switches from
 *	  one configuration method to another.
 *
 * 1998 03 09	Axel Boldt
 *	- Smaller layout of main menu - it's still too big for 800x600.
 *	- Display help in text window to allow for cut and paste.
 *	- Allow for empty lines in help texts.
 *	- update_define should not set all variables unconditionally to 0:
 *	  they may have been set to 1 elsewhere.
 *
 * 2002 04 22	Riley Williams
 *	- Reindented code throughout, resulting in consistent formatting.
 *
 * TO DO:
 *	- clean up - there are useless ifdef's everywhere.
 *	- better comments throughout - C code generating tcl is really cryptic.
 *	- eliminate silly "update idletasks" hack to improve display speed and
 *	  reduce flicker. But how?
 *	- make canvas contents resize with the window (good luck).
 *	- make submenus inside of submenus (ie. Main->Networking->IP)
 *	  (perhaps a button where the description would be)
 *	- make the main menu use the same tcl code as the submenus.
 *	- make choice and int/hex input types line up vertically with
 *	  bool/tristate.
 *	- general speedups - how? The canvas seems to slow it down a lot.
 *	- clean up +/- 16 confusion for enabling/disabling variables; causes
 *	  (theoretical, at the moment) problems with dependencies.
 */

#include <stdio.h>
#include <unistd.h>

#include "tkparse.h"

#ifndef FALSE
#define FALSE	0
#endif

#ifndef TRUE
#define TRUE	(!FALSE)
#endif

/*
 * This is the total number of submenus that we have.
 */
static int tot_menu_num = 0;

/*
 * Generate portion of wish script for the beginning of a submenu.
 * The guts get filled in with the various options.
 */
static void start_proc(char *label, int menu_num, int flag)
{
    if (flag)
	printf("menu_option menu%d %d \"%s\"\n", menu_num, menu_num, label);

    printf("proc menu%d {w title} {\n", menu_num);
    printf("\tcatch {destroy $w}\n");
    printf("\ttoplevel $w -class Dialog\n");
    printf("\twm withdraw $w\n");
    printf("\tmessage $w.m -width 400 -aspect 300 -text \\\n");
    printf("\t\t\"%s\"  -relief raised\n", label);
    printf("\tpack $w.m -pady 10 -side top -padx 10\n");
    printf("\twm title $w \"%s\" \n\n", label);

    /*
     * Attach the "Prev", "Next" and "OK" buttons at the end of the window.
     */
    printf("\tset oldFocus [focus]\n");
    printf("\tframe $w.f\n");
    printf("\tbutton $w.f.back -text \"Main Menu\" \\\n"
	   "\t\t-width 15 -command \"destroy $w; focus $oldFocus; update_mainmenu $w\"\n");
    printf("\tbutton $w.f.next -text \"Next\" \\\n"
	   "\t\t-width 15 -command \" destroy $w; focus $oldFocus;  menu%d .menu%d \\\"$title\\\"\"\n",
	   menu_num + 1, menu_num + 1);
    if (menu_num == tot_menu_num)
	printf("\t$w.f.next configure -state disabled\n");
    printf("\tbutton $w.f.prev -text \"Prev\" \\\n"
	   "\t\t-width 15 -command \" destroy $w; focus $oldFocus; menu%d .menu%d \\\"$title\\\"\"\n",
	   menu_num - 1, menu_num - 1);
    if (1 == menu_num)
	printf("\t$w.f.prev configure -state disabled\n");
    printf("\tpack $w.f.back $w.f.next $w.f.prev -side left -expand on\n");
    printf("\tpack $w.f -pady 10 -side bottom -anchor w -fill x\n");

    /*
     * Lines between canvas and other areas of the window.
     */
    printf("\tframe $w.topline -relief ridge -borderwidth 2 -height 2\n");
    printf("\tpack $w.topline -side top -fill x\n\n");
    printf("\tframe $w.botline -relief ridge -borderwidth 2 -height 2\n");
    printf("\tpack $w.botline -side bottom -fill x\n\n");

    /*
     * The "config" frame contains the canvas and a scrollbar.
     */
    printf("\tframe $w.config\n");
    printf("\tpack $w.config -fill y -expand on\n\n");
    printf
	("\tscrollbar $w.config.vscroll -command \"$w.config.canvas yview\"\n");
    printf("\tpack $w.config.vscroll -side right -fill y\n\n");

    /*
     * The scrollable canvas itself, where the real work (and mess) gets done.
     */
    printf("\tcanvas $w.config.canvas -height 1\\\n"
	   "\t\t-relief flat -borderwidth 0 -yscrollcommand \"$w.config.vscroll set\" \\\n"
	   "\t\t-width [expr [winfo screenwidth .] * 1 / 2] \n");
    printf("\tframe $w.config.f\n");
    printf("\tpack $w.config.canvas -side right -fill y\n");

    printf("\n\n");
}

/*
 * Each proc we create needs a global declaration for any global variables we
 * use. To minimize the size of the file, we set a flag each time we output
 * a global declaration so we know whether we need to insert one for a given
 * function or not.
 */
void clear_globalflags(struct kconfig *cfg)
{
    for (; cfg != NULL; cfg = cfg->next)
	cfg->flags &= ~GLOBAL_WRITTEN;
}

/*
 * Output a "global" line for a given variable. Also include the call to
 * "vfix". (If vfix is not needed, then it's fine to just printf a "global"
 * line).
 */
void inline global (char *var) {
    printf("\tglobal %s; vfix %s\n", var, var);
}

/*
 * This function walks the chain of conditions that we got from cond.c,
 * and creates a wish conditional to enable/disable a given widget.
 */
void generate_if(struct kconfig *item,
		 struct condition *cond, int menu_num, int line_num)
{
    struct condition *ocond = cond;

    /*
     * First write any global declarations we need for this conditional.
     */
    while (cond != NULL) {
	switch (cond->op) {
	case op_variable:
	    global (cond->variable.str);
	    break;
	case op_kvariable:
	    if (cond->variable.cfg->flags & GLOBAL_WRITTEN)
		break;
	    cond->variable.cfg->flags |= GLOBAL_WRITTEN;
	    global (cond->variable.cfg->optionname);
	    break;
	default:
	    break;
	}
	cond = cond->next;
    }

    /*
     * Now write this option.
     */
    if ((item->flags & GLOBAL_WRITTEN) == 0 && (item->optionname != NULL)) {
	global (item->optionname);
	item->flags |= GLOBAL_WRITTEN;
    }

    /*
     * Now generate the body of the conditional.
     */
    printf("\tif {");
    cond = ocond;
    while (cond != NULL) {
	switch (cond->op) {
	case op_bang:
	    printf(" ! ");
	    break;
	case op_eq:
	    printf(" == ");
	    break;
	case op_neq:
	    printf(" != ");
	    break;
	case op_and:
	case op_and1:
	    printf(" && ");
	    break;
	case op_or:
	    printf(" || ");
	    break;
	case op_lparen:
	    printf("(");
	    break;
	case op_rparen:
	    printf(")");
	    break;
	case op_variable:
	    printf("$%s", cond->variable.str);
	    break;
	case op_kvariable:
	    printf("$%s", cond->variable.cfg->optionname);
	    break;
	case op_shellcmd:
	    printf("[exec %s]", cond->variable.str);
	    break;
	case op_constant:
	    if (strcmp(cond->variable.str, "y") == 0)
		printf("1");
	    else if (strcmp(cond->variable.str, "n") == 0)
		printf("0");
	    else if (strcmp(cond->variable.str, "m") == 0)
		printf("2");
	    else
		printf("\"%s\"", cond->variable.str);
	    break;
	default:
	    break;
	}
	cond = cond->next;
    }

    /*
     * Now we generate what we do depending upon the value of the conditional.
     * Depending upon what the token type is, there are different things
     * we must do to enable/disable the given widget - this code needs to
     * be closely coordinated with the widget creation procedures in header.tk.
     */
    switch (item->tok) {
    case tok_define:
	printf("} then { set %s %s } \n", item->optionname, item->value);
	break;
    case tok_menuoption:
	printf
	    ("} then { .f0.x%d configure -state normal } else { .f0.x%d configure -state disabled }\n",
	     menu_num, menu_num);
	break;
    case tok_int:
    case tok_hex:
    case tok_string:
	printf("} then { ");
	printf
	    (".menu%d.config.f.x%d.x configure -state normal -fore [ cget .ref -foreground ]; ",
	     menu_num, line_num);
	printf(".menu%d.config.f.x%d.l configure -state normal; ", menu_num,
	       line_num);
	printf("} else { ");
	printf
	    (".menu%d.config.f.x%d.x configure -state disabled -fore [ cget .ref -disabledforeground ];",
	     menu_num, line_num);
	printf(".menu%d.config.f.x%d.l configure -state disabled;", menu_num,
	       line_num);
	printf("}\n");
	break;
    case tok_bool:

#ifdef BOOL_IS_BUTTON
	/*
	 * If a bool is just a button, then use this definition.
	 */
	printf
	    ("} then { .menu%d.config.f.x%d configure -state normal } else { .menu%d.config.f.x%d configure -state disabled }\n",
	     menu_num, line_num, menu_num, line_num);

#else

	/*
	 * If a bool is a radiobutton, then use this instead.
	 */
	printf("} then { ");
	printf(".menu%d.config.f.x%d.y configure -state normal;", menu_num,
	       line_num);
	printf(".menu%d.config.f.x%d.n configure -state normal;", menu_num,
	       line_num);
	printf(".menu%d.config.f.x%d.l configure -state normal;", menu_num,
	       line_num);
	printf("set %s [expr $%s&15];", item->optionname, item->optionname);
	printf("} else { ");
	printf(".menu%d.config.f.x%d.y configure -state disabled;", menu_num,
	       line_num);
	printf(".menu%d.config.f.x%d.n configure -state disabled;", menu_num,
	       line_num);
	printf(".menu%d.config.f.x%d.l configure -state disabled;", menu_num,
	       line_num);
	printf("set %s [expr $%s|16];", item->optionname, item->optionname);
	printf("}\n");

#endif

	break;
    case tok_tristate:
    case tok_dep_tristate:
	printf("} then { ");
	if (item->tok == tok_dep_tristate) {
	    global (item->depend.str);
	    printf("if { $%s != 1 && $%s != 0 } then {",
		   item->depend.str, item->depend.str);
	    printf(".menu%d.config.f.x%d.y configure -state disabled;",
		   menu_num, line_num);
	    printf("} else {");
	    printf(".menu%d.config.f.x%d.y configure -state normal;", menu_num,
		   line_num);
	    printf("}; ");
	} else {
	    printf(".menu%d.config.f.x%d.y configure -state normal;", menu_num,
		   line_num);
	}

	printf(".menu%d.config.f.x%d.n configure -state normal;", menu_num,
	       line_num);
	printf(".menu%d.config.f.x%d.m configure -state normal;", menu_num,
	       line_num);
	printf(".menu%d.config.f.x%d.l configure -state normal;", menu_num,
	       line_num);
	/*
	 * Or in a bit to the variable - this causes all of the radiobuttons
	 * to be deselected (i.e. not be red).
	 */
	printf("set %s [expr $%s&15];", item->optionname, item->optionname);
	printf("} else { ");
	printf(".menu%d.config.f.x%d.y configure -state disabled;", menu_num,
	       line_num);
	printf(".menu%d.config.f.x%d.n configure -state disabled;", menu_num,
	       line_num);
	printf(".menu%d.config.f.x%d.m configure -state disabled;", menu_num,
	       line_num);
	printf(".menu%d.config.f.x%d.l configure -state disabled;", menu_num,
	       line_num);
	/*
	 * Clear the disable bit - this causes the correct radiobutton
	 * to appear selected (i.e. turn red).
	 */
	printf("set %s [expr $%s|16];", item->optionname, item->optionname);
	printf("}\n");
	break;
    case tok_choose:
    case tok_choice:
	fprintf(stderr, "Fixme\n");
	exit(0);
    default:
	break;
    }
}

/*
 * Similar to generate_if, except we come here when generating an output file.
 * Thus instead of enabling/disabling a widget, we need to decide whether to
 * write out a given configuration variable to the output file.
 */
void generate_if_for_outfile(struct kconfig *item, struct condition *cond)
{
    struct condition *ocond;

    /*
     * First write any global declarations we need for this conditional.
     */
    ocond = cond;
    for (; cond != NULL; cond = cond->next) {
	switch (cond->op) {
	case op_variable:
	    global (cond->variable.str);
	    break;
	case op_kvariable:
	    if (cond->variable.cfg->flags & GLOBAL_WRITTEN)
		break;
	    cond->variable.cfg->flags |= GLOBAL_WRITTEN;
	    global (cond->variable.cfg->optionname);
	    break;
	default:
	    break;
	}
    }

    /*
     * Now generate the body of the conditional.
     */
    printf("\tif {");
    cond = ocond;
    while (cond != NULL) {
	switch (cond->op) {
	case op_bang:
	    printf(" ! ");
	    break;
	case op_eq:
	    printf(" == ");
	    break;
	case op_neq:
	    printf(" != ");
	    break;
	case op_and:
	case op_and1:
	    printf(" && ");
	    break;
	case op_or:
	    printf(" || ");
	    break;
	case op_lparen:
	    printf("(");
	    break;
	case op_rparen:
	    printf(")");
	    break;
	case op_variable:
	    printf("$%s", cond->variable.str);
	    break;
	case op_shellcmd:
	    printf("[exec %s]", cond->variable.str);
	    break;
	case op_kvariable:
	    printf("$%s", cond->variable.cfg->optionname);
	    break;
	case op_constant:
	    if (strcmp(cond->variable.str, "y") == 0)
		printf("1");
	    else if (strcmp(cond->variable.str, "n") == 0)
		printf("0");
	    else if (strcmp(cond->variable.str, "m") == 0)
		printf("2");
	    else
		printf("\"%s\"", cond->variable.str);
	    break;
	default:
	    break;
	}
	cond = cond->next;
    }

    /*
     * Now we generate what we do depending upon the value of the conditional.
     * Depending upon what the token type is, there are different things we
     * must do to write the value of the given widget - this code needs to be
     * closely coordinated with the widget creation procedures in header.tk.  
     */
    switch (item->tok) {
    case tok_define:
	printf("} then {write_tristate $cfg $autocfg %s %s $notmod }\n",
	       item->optionname, item->value);
	break;
    case tok_comment:
	printf("} then {write_comment $cfg $autocfg \"%s\"}\n", item->label);
	break;
    case tok_dep_tristate:
	printf("} then { write_tristate $cfg $autocfg %s $%s $%s } \n",
	       item->optionname, item->optionname, item->depend.str);
	break;
    case tok_tristate:
    case tok_bool:
	printf("} then { write_tristate $cfg $autocfg %s $%s $notmod }\n",
	       item->optionname, item->optionname);
	break;
    case tok_int:
	printf("} then { write_int $cfg $autocfg %s $%s $notmod }\n",
	       item->optionname, item->optionname);
	break;
    case tok_hex:
	printf("} then { write_hex $cfg $autocfg %s $%s $notmod }\n",
	       item->optionname, item->optionname);
	break;
    case tok_string:
	printf("} then { write_string $cfg $autocfg %s $%s $notmod }\n",
	       item->optionname, item->optionname);
	break;
    case tok_choose:
    case tok_choice:
	fprintf(stderr, "Fixme\n");
	exit(0);
    default:
	break;
    }
}

/*
 * Generates a fragment of wish script that closes out a submenu procedure.
 */
static void end_proc(int menu_num)
{
    struct kconfig *cfg;

    printf("\n\n\n");
    printf("\tfocus $w\n");
    printf("\tupdate_menu%d $w.config.f\n", menu_num);
    printf("\tglobal winx; global winy\n");
    printf
	("\tset winx [expr [winfo x .]+30]; set winy [expr [winfo y .]+30]\n");
    printf("\twm geometry $w +$winx+$winy\n");

    /*
     * Now that the whole window is in place, we need to wait for an "update"
     * so we can tell the canvas what its virtual size should be.
     *
     * Unfortunately, this causes some ugly screen-flashing because the whole
     * window is drawn, and then it is immediately resized. It seems
     * unavoidable, though, since "frame" objects won't tell us their size
     * until after an update, and "canvas" objects can't automatically pack
     * around frames. Sigh.
     */
    printf("\tupdate idletasks\n");
    printf
	("\t$w.config.canvas create window 0 0 -anchor nw -window $w.config.f\n\n");
    printf("\t$w.config.canvas configure \\\n"
	   "\t\t-width [expr [winfo reqwidth $w.config.f] + 1]\\\n"
	   "\t\t-scrollregion \"-1 -1 [expr [winfo reqwidth $w.config.f] + 1] \\\n"
	   "\t\t\t [expr [winfo reqheight $w.config.f] + 1]\"\n\n");

    /*
     * If the whole canvas will fit in 3/4 of the screen height, do it;
     * otherwise, resize to around 1/2 the screen and let us scroll.
     */
    printf
	("\tset winy [expr [winfo reqh $w] - [winfo reqh $w.config.canvas]]\n");
    printf("\tset scry [expr [winfo screenh $w] / 2]\n");
    printf("\tset maxy [expr [winfo screenh $w] * 3 / 4]\n");
    printf("\tset canvtotal [expr [winfo reqh $w.config.f] + 2]\n");
    printf("\tif [expr $winy + $canvtotal < $maxy] {\n"
	   "\t\t$w.config.canvas configure -height $canvtotal\n"
	   "\t} else {\n"
	   "\t\t$w.config.canvas configure -height [expr $scry - $winy]\n"
	   "\t}\n");

    /*
     * Limit the min/max window size. Height can vary, but not width,
     * because of the limitations of canvas and our laziness.
     */
    printf("\tupdate idletasks\n");
    printf("\twm maxsize $w [winfo width $w] [winfo screenheight $w]\n");
    printf("\twm minsize $w [winfo width $w] 100\n\n");
    printf("\twm deiconify $w\n");

    printf("}\n\n\n");

    /*
     * Now we generate the companion procedure for the menu we just generated.
     * This procedure contains all of the code to disable/enable widgets based
     * upon the settings of the other widgets, and will be called first when
     * the window is mapped, and each time one of the buttons in the window
     * are clicked.
     */
    printf("proc update_menu%d {w}  {\n", menu_num);

    printf("\tupdate_define\n");
    clear_globalflags(config);
    for (cfg = config; cfg != NULL; cfg = cfg->next) {
	/*
	 * Skip items not for this menu, or ones having no conditions.
	 */
	if (cfg->menu_number != menu_num)
	    continue;
	if (cfg->tok != tok_define)
	    continue;
	/*
	 * Clear all of the booleans that are defined in this menu.
	 */
	if ((cfg->flags & GLOBAL_WRITTEN) == 0 && (cfg->optionname != NULL)) {
	    printf("\tglobal %s\n", cfg->optionname);
	    cfg->flags |= GLOBAL_WRITTEN;
	    printf("\tset %s 0\n", cfg->optionname);
	}

    }
    for (cfg = config; cfg != NULL; cfg = cfg->next) {
	/*
	 * Skip items not for this menu, or ones having no conditions.
	 */
	if (cfg->menu_number != menu_num)
	    continue;
	if (cfg->tok == tok_menuoption)
	    continue;
	if (cfg->cond != NULL)
	    generate_if(cfg, cfg->cond, menu_num, cfg->menu_line);
	else {
	    /*
	     * If this token has no conditionals, check to see whether it is a
	     * tristate - if so, then generate the conditional to enable or
	     * disable the "y" button based upon the setting of the option it
	     * depends upon.
	     */
	    if (cfg->tok == tok_dep_tristate) {
		global (cfg->depend.str);
		printf
		    ("\tif {$%s != 1 && $%s != 0 } then { .menu%d.config.f.x%d.y configure -state disabled } else { .menu%d.config.f.x%d.y configure -state normal}\n",
		     cfg->depend.str, cfg->depend.str, menu_num,
		     cfg->menu_line, menu_num, cfg->menu_line);
	    }
	}

    }


    printf("}\n\n\n");
}

/*
 * This function goes through and counts up the number of items in each
 * submenu. If there are too many options, we need to split it into submenus.
 * This function just calculates how many submenus, and how many items go in
 * each submenu.
 */
static void find_menu_size(struct kconfig *cfg,
			   int *menu_max, int *menu_maxlines)
{
    struct kconfig *pnt;
    int tot;

    /*
     * First count up the number of options in this menu.
     */
    tot = 0;
    for (pnt = cfg->next; pnt; pnt = pnt->next) {
	if (pnt->tok == tok_menuoption)
	    break;
	switch (pnt->tok) {
	case tok_bool:
	case tok_tristate:
	case tok_dep_tristate:
	case tok_int:
	case tok_hex:
	case tok_string:
	case tok_choose:
	    tot++;
	    break;
	case tok_choice:
	default:
	    break;
	}
    }

    *menu_max = cfg->menu_number;
    *menu_maxlines = tot;
}

/*
 * This is the top level function for generating the tk script.
 */
void dump_tk_script(struct kconfig *scfg)
{
    int menu_num = 0;
    int menu_max = 0;
    int menu_min = 0;
    int menu_line = 0;
    int menu_maxlines = 0;
    struct kconfig *cfg;
    struct kconfig *cfg1 = NULL;
    char *menulabel = "tkgen error";

    /*
     * Start by assigning menu numbers, and submenu numbers.
     */
    for (cfg = scfg; cfg != NULL; cfg = cfg->next) {
	switch (cfg->tok) {
	case tok_menuname:
	    break;
	case tok_menuoption:
	    /*
	     * At the start of a new menu, calculate the number of items we
	     * will put into each submenu so we know when to bump the menu
	     * number. The submenus are really no different from a normal menu,
	     * but the top level buttons only access the first of the chain of
	     * menus, and the prev/next buttons are used to access the submenus.
	     */
	    cfg->menu_number = ++menu_num;
	    find_menu_size(cfg, &menu_max, &menu_maxlines);
	    cfg->submenu_start = menu_num;
	    cfg->submenu_end = menu_max;
	    menu_line = 0;
	    break;
	case tok_bool:
	case tok_tristate:
	case tok_dep_tristate:
	case tok_int:
	case tok_hex:
	case tok_string:
	case tok_choose:
	    /*
	     * If we have overfilled the menu, then go to the next one.
	     */
	    if (menu_line == menu_maxlines) {
		menu_line = 0;
		menu_num++;
	    }
	    cfg->menu_number = menu_num;
	    cfg->submenu_start = menu_min;
	    cfg->submenu_end = menu_max;
	    cfg->menu_line = menu_line++;
	    break;
	case tok_define:
	    cfg->menu_number = -1;
	case tok_choice:
	default:
	    break;
	};
    }

    /*
     * Record this so we can set up the prev/next buttons correctly.
     */
    tot_menu_num = menu_num;

    /*
     * Now start generating the actual wish script that we will use. We need
     * to keep track of the menu numbers of the min/max menu for a range of
     * submenus so that we can correctly limit the prev and next buttons so
     * that they don't go over into some other category.
     */
    for (cfg = scfg; cfg != NULL; cfg = cfg->next) {
	switch (cfg->tok) {
	case tok_menuname:
	    printf("mainmenu_name \"%s\"\n", cfg->label);
	    break;
	case tok_menuoption:
	    /*
	     * We are at the start of a new menu. If we had one that we were
	     * working on before, close it out, and then generate the script
	     * to start the new one.
	     */
	    if (cfg->menu_number > 1)
		end_proc(menu_num);
	    menulabel = cfg->label;
	    start_proc(cfg->label, cfg->menu_number, TRUE);
	    menu_num = cfg->menu_number;
	    menu_max = cfg->submenu_end;
	    menu_min = cfg->submenu_start;
	    break;
	case tok_bool:
	    /*
	     * If we reached the point where we need to switch over to the next
	     * submenu, then bump the menu number and generate the code to
	     * close out the old menu and start the new one.
	     */
	    if (cfg->menu_number != menu_num) {
		end_proc(menu_num);
		start_proc(menulabel, cfg->menu_number, FALSE);
		menu_num = cfg->menu_number;
	    }
	    printf("\tbool $w.config.f %d %d \"%s\" %s\n",
		   cfg->menu_number,
		   cfg->menu_line, cfg->label, cfg->optionname);
	    break;

	case tok_choice:
	    printf
		("\t$w.config.f.x%d.x.menu add radiobutton -label \"%s\" -variable %s -value \"%s\" -command \"update_menu%d .menu%d.config.f\"\n",
		 cfg1->menu_line, cfg->label, cfg1->optionname, cfg->label,
		 cfg1->menu_number, cfg1->menu_number);
	    break;
	case tok_choose:
	    if (cfg->menu_number != menu_num) {
		end_proc(menu_num);
		start_proc(menulabel, cfg->menu_number, FALSE);
		menu_num = cfg->menu_number;
	    }
	    printf("\tglobal %s\n", cfg->optionname);
	    printf("\tminimenu $w.config.f %d %d \"%s\" %s %s\n",
		   cfg->menu_number,
		   cfg->menu_line, cfg->label, cfg->optionname,
		   /*
		    * We rely on the fact that the first tok_choice that
		    * corresponds to the current tok_choose is cfg->next
		    * (compare parse() in tkparse.c). We need its name to
		    * pick out the right help text from Configure.help.
		    */
		   cfg->next->optionname);
	    printf("\tmenu $w.config.f.x%d.x.menu\n", cfg->menu_line);
	    cfg1 = cfg;
	    break;
	case tok_tristate:
	    if (cfg->menu_number != menu_num) {
		end_proc(menu_num);
		start_proc(menulabel, cfg->menu_number, FALSE);
		menu_num = cfg->menu_number;
	    }
	    printf("\ttristate $w.config.f %d %d \"%s\" %s\n",
		   cfg->menu_number,
		   cfg->menu_line, cfg->label, cfg->optionname);
	    break;
	case tok_dep_tristate:
	    if (cfg->menu_number != menu_num) {
		end_proc(menu_num);
		start_proc(menulabel, cfg->menu_number, FALSE);
		menu_num = cfg->menu_number;
	    }
	    printf("\tdep_tristate $w.config.f %d %d \"%s\" %s %s\n",
		   cfg->menu_number,
		   cfg->menu_line,
		   cfg->label, cfg->optionname, cfg->depend.str);
	    break;
	case tok_int:
	    if (cfg->menu_number != menu_num) {
		end_proc(menu_num);
		start_proc(menulabel, cfg->menu_number, FALSE);
		menu_num = cfg->menu_number;
	    }
	    printf("\tint $w.config.f %d %d \"%s\" %s\n",
		   cfg->menu_number,
		   cfg->menu_line, cfg->label, cfg->optionname);
	    break;
	case tok_hex:
	    if (cfg->menu_number != menu_num) {
		end_proc(menu_num);
		start_proc(menulabel, cfg->menu_number, FALSE);
		menu_num = cfg->menu_number;
	    }
	    printf("\thex $w.config.f %d %d \"%s\" %s\n",
		   cfg->menu_number,
		   cfg->menu_line, cfg->label, cfg->optionname);
	    break;
	case tok_string:
	    if (cfg->menu_number != menu_num) {
		end_proc(menu_num);
		start_proc(menulabel, cfg->menu_number, FALSE);
		menu_num = cfg->menu_number;
	    }
	    printf("\tistring $w.config.f %d %d \"%s\" %s\n",
		   cfg->menu_number,
		   cfg->menu_line, cfg->label, cfg->optionname);
	    break;
	default:
	    break;
	}

    }

    /*
     * Generate the code to close out the last menu.
     */
    end_proc(menu_num);

    /*
     * The top level menu also needs an update function. When we exit a
     * submenu, we may need to disable one or more of the submenus on the
     * top level menu, and this procedure will ensure that things are correct.
     */
    printf("proc update_mainmenu {w}  {\n");
    for (cfg = scfg; cfg != NULL; cfg = cfg->next) {
	switch (cfg->tok) {
	case tok_menuoption:
	    if (cfg->cond != NULL)
		generate_if(cfg, cfg->cond, cfg->menu_number, cfg->menu_line);
	    break;
	default:
	    break;
	}
    }

    printf("}\n\n\n");

#if 0

    /*
     * Generate some code to set the variables that are "defined".
     */
    for (cfg = config; cfg != NULL; cfg = cfg->next) {
	/*
	 * Skip items not for this menu, or ones having no conditions.
	 */
	if (cfg->tok != tok_define)
	    continue;
	if (cfg->cond != NULL)
	    generate_if(cfg, cfg->cond, menu_num, cfg->menu_line);
	else {
	    printf("\twrite_define %s %s\n", cfg->optionname, cfg->value);
	}

    }

#endif

    /*
     * Now generate code to load the default settings into the variables. Note
     * that the script in tail.tk will attempt to load .config, which may
     * override these settings, but that's OK.
     */
    for (cfg = scfg; cfg != NULL; cfg = cfg->next) {
	switch (cfg->tok) {
	case tok_bool:
	case tok_tristate:
	case tok_dep_tristate:
	case tok_choice:
	    printf("set %s 0\n", cfg->optionname);
	    break;
	case tok_int:
	case tok_hex:
	case tok_string:
	    printf("set %s %s\n", cfg->optionname, cfg->value);
	    break;
	case tok_choose:
	    printf("set %s \"(not set)\"\n", cfg->optionname);
	default:
	    break;
	}
    }

    /*
     * Next generate a function that can be called from the main menu that
     * will write all of the variables out. This also serves double duty as
     * we can save the configuration to a file using this.
     */
    printf("proc writeconfig {file1 file2} {\n");
    printf("\tset cfg [open $file1 w]\n");
    printf("\tset autocfg [open $file2 w]\n");
    printf("\tset notmod 1\n");
    printf("\tset notset 0\n");
    clear_globalflags(config);
    printf("\tputs $cfg \"#\"\n");
    printf
	("\tputs $cfg \"# Automatically generated make config: don't edit\"\n");
    printf("\tputs $cfg \"#\"\n");

    printf("\tputs $autocfg \"/*\"\n");
    printf
	("\tputs $autocfg \" * Automatically generated C config: don't edit\"\n");
    printf("\tputs $autocfg \" */\"\n");
    printf("\tputs $autocfg \"#define AUTOCONF_INCLUDED\"\n");
    for (cfg = scfg; cfg != NULL; cfg = cfg->next) {
	switch (cfg->tok) {
	case tok_int:
	case tok_hex:
	case tok_string:
	case tok_bool:
	case tok_tristate:
	case tok_dep_tristate:
	case tok_define:
	case tok_choose:
	    if (!(cfg->flags & GLOBAL_WRITTEN)) {
		cfg->flags |= GLOBAL_WRITTEN;
		printf("\tglobal %s\n", cfg->optionname);
	    }
	    /* fall through */
	case tok_comment:
	    if (cfg->cond != NULL)
		generate_if_for_outfile(cfg, cfg->cond);
	    else {
		if (cfg->tok == tok_dep_tristate) {
		    printf("\tif {$%s == 0 } then {\n"
			   "\t\twrite_tristate $cfg $autocfg %s $notset $notmod\n"
			   "\t} else {\n"
			   "\t\twrite_tristate $cfg $autocfg %s $%s $%s\n"
			   "\t}\n",
			   cfg->depend.str,
			   cfg->optionname,
			   cfg->optionname, cfg->optionname, cfg->depend.str);
		} else if (cfg->tok == tok_comment)
		    printf("\twrite_comment $cfg $autocfg \"%s\"\n",
			   cfg->label);

#if 0

		else if (cfg->tok == tok_define)
		    printf("\twrite_define %s %s\n", cfg->optionname,
			   cfg->value);

#endif

		else if (cfg->tok == tok_choose) {
		    for (cfg1 = cfg->next;
			 cfg1 != NULL && cfg1->tok == tok_choice;
			 cfg1 = cfg1->next) {
			printf
			    ("\tif { $%s == \"%s\" } then { write_tristate $cfg $autocfg %s 1 $notmod } else { write_tristate $cfg $autocfg %s 0 $notmod }\n",
			     cfg->optionname, cfg1->label, cfg1->optionname,
			     cfg1->optionname);
		    }
		} else if (cfg->tok == tok_int) {
		    printf("\twrite_int $cfg $autocfg %s $%s $notmod\n",
			   cfg->optionname, cfg->optionname);
		} else if (cfg->tok == tok_hex) {
		    printf("\twrite_hex $cfg $autocfg %s $%s $notmod\n",
			   cfg->optionname, cfg->optionname);
		} else if (cfg->tok == tok_string) {
		    printf("\twrite_string $cfg $autocfg %s $%s $notmod\n",
			   cfg->optionname, cfg->optionname);
		} else {
		    printf("\twrite_tristate $cfg $autocfg %s $%s $notmod\n",
			   cfg->optionname, cfg->optionname);
		}
	    }
	    break;
	default:
	    break;
	}
    }
    printf("\tclose $cfg\n");
    printf("\tclose $autocfg\n");
    printf("}\n\n\n");

    /*
     * Finally write a simple function that updates the master choice variable
     * depending upon what values were loaded from a .config file.  
     */
    printf("proc clear_choices { } {\n");
    for (cfg = scfg; cfg != NULL; cfg = cfg->next) {
	if (cfg->tok != tok_choose)
	    continue;
	for (cfg1 = cfg->next;
	     cfg1 != NULL && cfg1->tok == tok_choice; cfg1 = cfg1->next) {
	    printf("\tglobal %s; set %s 0\n", cfg1->optionname,
		   cfg1->optionname);
	}
    }
    printf("}\n\n\n");

    printf("proc update_choices { } {\n");
    for (cfg = scfg; cfg != NULL; cfg = cfg->next) {
	if (cfg->tok != tok_choose)
	    continue;
	printf("\tglobal %s\n", cfg->optionname);
	for (cfg1 = cfg->next;
	     cfg1 != NULL && cfg1->tok == tok_choice; cfg1 = cfg1->next) {
	    printf("\tglobal %s\n", cfg1->optionname);
	    printf("\tif { $%s == 1 } then { set %s \"%s\" }\n",
		   cfg1->optionname, cfg->optionname, cfg1->label);
	}
    }
    printf("}\n\n\n");

    printf("proc update_define { } {\n");
    clear_globalflags(config);
    for (cfg = scfg; cfg != NULL; cfg = cfg->next) {
	if (cfg->tok != tok_define)
	    continue;
	printf("\tglobal %s\n", cfg->optionname);
	cfg->flags |= GLOBAL_WRITTEN;
    }
    for (cfg = scfg; cfg != NULL; cfg = cfg->next) {
	if (cfg->tok != tok_define)
	    continue;
	if (cfg->cond != NULL)
	    generate_if(cfg, cfg->cond, -1, 0);
	else {
	    printf("\tset %s %s\n", cfg->optionname, cfg->value);
	}
    }
    printf("}\n\n\n");
    /*
     * That's it. We are done. The output of this file will have header.tk
     * prepended and tail.tk appended to create an executable wish script.
     */
}
