source: IOIPSL/trunk/tools/tkgen.c @ 30

/* Generate tk script based upon config.in
 * $Id$
 * Version 1.0
 * Eric Youngdale
 * 10/95
 *
 * 1996 01 04
 * Avery Pennarun - Aesthetic improvements.
 *
 * 1996 01 24
 * Avery Pennarun - 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.
 *
 * 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).
 *   - some way to 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.
 *   - choice buttons should default to the first menu option, rather than a
 *           blank.  Also look up the right variable when the help button
 *           is pressed.
 *   - 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 TRUE
#define TRUE (1)
#endif

#ifndef FALSE
#define FALSE (0)
#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 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;

  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:
      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 write the value 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_make:
      printf("} then { do_make {%s} }\n",item->value);
      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/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_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;

  /*
   * 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
           * 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_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 corresponding
                 * 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;
        default:
          break;
        }

    }

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

#ifdef ERIC_DONT_DEF
  /*
   * Generate the code for configuring the sound driver.  Right now this
   * cannot be done from the X script, but we insert the menu anyways.
   */
  start_proc("Configure sound driver", ++menu_num, TRUE);
#if 0
  printf("\tdo_make -C drivers/sound config\n");
  printf("\techo check_sound_config %d\n",menu_num);
#endif
  printf("\tlabel $w.config.f.m0 -bitmap error\n");
  printf("\tmessage $w.config.f.m1 -width 400 -aspect 300 -text \"The sound drivers cannot as of yet be configured via the X-based interface\" -relief raised\n");
  printf("\tpack $w.config.f.m0 $w.config.f.m1 -side top -pady 10 -expand on\n");
  /*
   * Close out the last menu.
   */
  end_proc(menu_num);
#endif

  /*
   * 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:
          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 - we can
   * save 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 $autocfg \" */\"\n");
  for(cfg = scfg; cfg != NULL; cfg = cfg->next)
    {
      switch (cfg->tok)
        {
        case tok_int:
        case tok_hex:
        case tok_bool:
        case tok_tristate:
        case tok_dep_tristate:
        case tok_define:
        case tok_choose:
          if(!(cfg->flags & GLOBAL_WRITTEN))
            {
              cfg->flags |= GLOBAL_WRITTEN;
              printf("\tglobal %s\n", cfg->optionname);
            }
          /* fall through */
        case tok_make:
        case tok_comment:
          if (cfg->cond != NULL ) 
            generate_if_for_outfile(cfg, cfg->cond);
          else
            {
              if(cfg->tok == tok_dep_tristate)
                {
                  printf("\tif {$%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 }\n",
                             cfg->optionname,
                             cfg1->label,
                             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_make )
                {
                  printf("\tdo_make {%s}\n",cfg->value);
                }
              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; set %s 0\n",  cfg->optionname,  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.
   */
}