/*      $NetBSD: parse.y,v 1.19 2019/06/23 22:48:15 christos Exp $      */

/*
* Copyright 1997 Piermont Information Systems Inc.
* All rights reserved.
*
* Written by Philip A. Nelson for Piermont Information Systems Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. The name of Piermont Information Systems Inc. may not be used to endorse
*    or promote products derived from this software without specific prior
*    written permission.
*
* THIS SOFTWARE IS PROVIDED BY PIERMONT INFORMATION SYSTEMS INC. ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL PIERMONT INFORMATION SYSTEMS INC. BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*
*/


%{

#include <stdio.h>
#include "defs.h"

static id_rec *cur_menu;
static optn_info *cur_optn;
#define OPT_NOMENU 0

%}

%union {
       char *s_value;
       int   i_value;
       optn_info *optn_value;
       action a_value;
}


%token <i_value> X Y W H NO BOX SUB HELP MENU NEXT EXIT ACTION ENDWIN OPTION
%token <i_value> TITLE DEFAULT DISPLAY ERROR EXITSTRING EXPAND ALLOW DYNAMIC
                MENUS SCROLLABLE SHORTCUT CLEAR MESSAGES ALWAYS SCROLL
                CONTINUOUS
%token <s_value> STRING NAME CODE INT_CONST CHAR_CONST

%type <s_value> init_code system helpstr text
%type <optn_value> option option_list
%type <i_value> act_opt
%type <a_value> action exitact

%start system

%%

system : init_code menu_list
        { check_defined();
          if (!had_errors)
                  write_menu_file($1);
        }
      ;

init_code : /* empty */ { $$ = ""; }
         | CODE
         ;

menu_list :  /* empty */
         |  menu_list menu_def
         |  menu_list default_def
         |  menu_list initerror_def
         |  menu_list expand_def
         |  menu_list dynamic_def
         |  menu_list msgxlat_def
         ;

dynamic_def : ALLOW DYNAMIC MENUS ';'
               { do_dynamic = 1; }

expand_def : ALLOW EXPAND ';'
               { do_expands = 1; }

msgxlat_def : ALLOW DYNAMIC MESSAGES ';'
               { do_msgxlat = 1; }

initerror_def : ERROR action ';'
               { error_act = $2; }

default_def : DEFAULT
               { cur_menu = &default_menu; }
             opt opt_list ";"

menu_def  :  MENU NAME
               { cur_menu = get_menu ($2);
                 if (cur_menu->info != NULL)
                         yyerror ("Menu %s defined twice", $2);
                 else {
                         cur_menu->info = malloc (sizeof (menu_info));
                         *(cur_menu->info) = default_info;
                 }
               }
            opts ";" expaction dispact option_list exitact helpstr
               { optn_info *t;
                 cur_menu->info->optns = NULL;
                 while ($8 != NULL) {
                         t = $8;
                         $8 = $8->next;
                         t->next = cur_menu->info->optns;
                         cur_menu->info->optns = t;
                         cur_menu->info->numopt++;
                 }
               }
         ;

opts      : /* empty */
         | opt_list
         ;

opt_list  : "," opt
         | opt_list "," opt
         ;

text      : NAME | STRING

opt       : NO EXIT             { cur_menu->info->mopt |= MC_NOEXITOPT; }
         | EXIT                { cur_menu->info->mopt &= ~MC_NOEXITOPT; }
         | NO BOX              { cur_menu->info->mopt |= MC_NOBOX; }
         | BOX                 { cur_menu->info->mopt &= ~MC_NOBOX; }
         | NO SCROLLABLE       { cur_menu->info->mopt &= ~MC_SCROLL; }
         | SCROLLABLE          { cur_menu->info->mopt |= MC_SCROLL; }
         | NO SHORTCUT         { cur_menu->info->mopt |= MC_NOSHORTCUT; }
         | SHORTCUT            { cur_menu->info->mopt &= ~MC_NOSHORTCUT; }
         | NO CLEAR            { cur_menu->info->mopt |= MC_NOCLEAR; }
         | CLEAR               { cur_menu->info->mopt &= ~MC_NOCLEAR; }
         | NO DEFAULT EXIT     { cur_menu->info->mopt &= ~MC_DFLTEXIT; }
         | DEFAULT EXIT        { cur_menu->info->mopt |= MC_DFLTEXIT; }
         | NO ALWAYS SCROLL    { cur_menu->info->mopt &= ~MC_ALWAYS_SCROLL; }
         | ALWAYS SCROLL       { cur_menu->info->mopt |= MC_ALWAYS_SCROLL; }
         | NO SUB MENU         { cur_menu->info->mopt &= ~MC_SUBMENU; }
         | SUB MENU            { cur_menu->info->mopt |= MC_SUBMENU; }
         | CONTINUOUS TITLE    { cur_menu->info->mopt |= MC_CONTINUOUS; }
         | X "=" INT_CONST     { cur_menu->info->x = atoi($3); }
         | Y "=" INT_CONST     { cur_menu->info->y = atoi($3); }
         | W "=" INT_CONST     { cur_menu->info->w = atoi($3); }
         | H "=" INT_CONST     { cur_menu->info->h = atoi($3); }
         | TITLE text          { cur_menu->info->title = $2; }
         | EXITSTRING text     { cur_menu->info->exitstr = $2;
                                 cur_menu->info->mopt &= ~MC_NOEXITOPT; }
         ;

option_list : option
         | option_list option  { $2->next = $1; $$ = $2; }
         ;

option    : OPTION
               { cur_optn = calloc(1, sizeof(*cur_optn));
                 cur_optn->optact.code = "";
               }
           option_legend ","
           elem_list ";"
               { $$ = cur_optn; }
         ;

option_legend : text    { cur_optn->name = $1; }
         | CODE        { cur_optn->name = $1; cur_optn->name_is_code = TRUE;}

elem_list : elem
         | elem_list "," elem
         ;

elem      : NEXT MENU NAME
               { id_rec *t = get_menu ($3);
                 if (cur_optn->menu != OPT_NOMENU)
                         yyerror ("Double sub/next menu definition");
                 else {
                         cur_optn->menu = t->menu_no;
                 }
               }
         | SUB MENU NAME
               { id_rec *t = get_menu ($3);
                 if (cur_optn->menu != OPT_NOMENU)
                         yyerror ("Double sub/next menu definition");
                 else {
                         cur_optn->menu = t->menu_no;
                         cur_optn->issub = TRUE;
                 }
               }
         | action      { cur_optn->optact = $1; }
         | EXIT        { cur_optn->doexit = TRUE; }
         ;

action    : ACTION act_opt CODE
               { $$.code = $3;
                 $$.endwin = $2;
               }
         ;

act_opt   : /* empty */         { $$ = 0; }
         | "(" ENDWIN ")"      { $$ = 1; }
         ;

expaction : /* empty */         { cur_menu->info->expact.code = ""; }
         | EXPAND action ";"   { if (!do_expands) yyerror ("Menu expands "
                                                            "not enabled");
                                 cur_menu->info->expact = $2; }
         ;

dispact   : /* empty */         { cur_menu->info->postact.code = ""; }
         | DISPLAY action ";"  { cur_menu->info->postact = $2; }
         ;


exitact   : /* empty */         { cur_menu->info->exitact.code = ""; }
         | EXIT action ";"     { cur_menu->info->exitact = $2; }
         ;

helpstr   : /* empty */         { cur_menu->info->helpstr = NULL; }
         | HELP CODE ";"       { asprintf(&cur_menu->info->helpstr, "\"%s\"", $2); }
         | HELP text ";"       { cur_menu->info->helpstr = $2; }
         ;

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