/******************************************************************/
 /*  Copyright (C) 2000, HELM Team                                 */ 
 /*                                                                */
 /* This file is part of HELM, an Hypertextual, Electronic         */
 /* Library of Mathematics, developed at the Computer Science      */
 /* Department, University of Bologna, Italy.                      */
 /*                                                                */
 /* HELM is free software; you can redistribute it and/or          */
 /* modify it under the terms of the GNU General Public License    */
 /* as published by the Free Software Foundation; either version   */
 /* 2 of the License, or (at your option) any later version.       */
 /*                                                                */
 /* HELM is distributed in the hope that it will be useful,        */
 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the   */
 /* GNU General Public License for more details.                   */
 /*                                                                */
 /* You should have received a copy of the GNU General Public      */
 /* License along with HELM; if not, write to the Free Software    */
 /* Foundation, Inc., 59 Temple Place - Suite 330, Boston,         */
 /* MA  02111-1307, USA.                                           */
 /*                                                                */
 /* For details, see the HELM World-Wide-Web page,                 */
 /* http://cs.unibo.it/helm/.                                      */
 /******************************************************************/

 /***************************************************************/
 /*		           META_LEXAN   			*/
 /*                 Automatic Metadata Extractor                */
 /*           First draft 11/12/2001, by Andrea Asperti         */
 /*      more bugs added by domenico lordi on mon 12/17/2001    */
 /***************************************************************/

 /***************************************************************/
 /* 1. Inclusion of header files.				*/
 /***************************************************************/

%{
#include                <string.h>
#include                <stdlib.h>
#include                <sys/stat.h>
#include                "sthandler.h"
%}

 /***************************************************************/
 /* 2. Constants and Variables Definitions                      */
 /***************************************************************/

%{
#define                 NOWHERE   0
#define                 CONST     1
#define                 MUTIND    2
#define                 MUTCONSTRUCT  3
#define                 SORT      4

#define                 INBODY    0
#define                 MAINHYP   1
#define                 INHYP     2
#define                 INCONCL   3
#define                 MAINCONCL 4
#define                 INTYPE    5
#define                 NOTFOUND  6

#define                 HERE      0     
#define                 AFTER     1


int			where = NOWHERE;
int                     found = NOTFOUND;
int                     position = INBODY;
int                     first_child = HERE;
int			skip = 0;     // boolean to skip the insertion of a URI
int                     no_open_source = 0;
int                     spine_depth = 0;
int                     depth = 0;
int                     tmp_n;
char                    sep = '"';
char                    *xpointer = "#xpointer(1/";
char                    *uri;
char                    *tmp;

void search(char *uri, int first_child, int position, int depth);
%}

 /***************************************************************/
 /* 3. Regular definitions.					*/
 /***************************************************************/

uri                     [^"]+
digits                  [0-9]+ 
value                   [^"]+                  

 /***************************************************************/
 /* 4. Rules.							*/
 /***************************************************************/


%%

"<Variable"[^>]*">"(" "|\n)*"<body" {
                    position = INBODY; // Variables have both a body and a type
                   }

"</body>"(" "|\n)*"<type" {
                    position = INTYPE; // Variables have both a body and a type
                    first_child = HERE;
                    no_open_source = 0;
                    spine_depth = 0;
                    depth = 0;   
                   }

"<decl"            |
"<def"             {
                    if (position == INTYPE)
                       position = MAINHYP;
                    else if (position == MAINHYP)
                        { position = INHYP;
                          no_open_source++;};
                   }

"</decl>"          |
"</def>"           {
                    if (position == INHYP)
                     {
                      no_open_source--;
                      if (no_open_source == 0) 
                        {
                         position = MAINHYP;
                         depth++;
                         first_child = HERE;
                        }
                     }
                    else if (position == MAINHYP)
                      {
                       position = INTYPE;
                       spine_depth++;
                       depth = 0;
                       first_child = HERE;
                      }
                    /* bug? first_child = HERE; */
                   }


.|\n               {
                   }

"<LAMBDA"          |
"<MUTCASE"         |
"<FIX"             |
"<COFIX"           { 
                          first_child = AFTER;
                   }

"<REL"             {
                    if (((position == INTYPE) | (position == MAINHYP)) &&
                       (first_child == HERE))
                     {
                       if (position == INTYPE) /* REL on the spine */
                         {
                           position = INCONCL;
                           search("Rel",first_child,position,spine_depth);
                         }
                       else search("Rel",first_child,position,depth);
                       first_child = AFTER;
                     }
                   }

"<SORT"(" "|\n)+"value=\""{value}   {         
                    if (((position == INTYPE) | (position == MAINHYP)) &&
                       (first_child == HERE))
                     {
                       tmp=(char *)malloc((sizeof('a')*200)); 
                       strcpy(tmp,yytext);
                       strsep(&tmp,&sep); 
                       if (position == INTYPE) /* SORT on the spine */
                         { 
                           position = INCONCL;
                           search(tmp,first_child,position,spine_depth);
                         }
                       else search(tmp,first_child,position,depth);
                       first_child = AFTER;
                     }
                   }

"<VAR"             {
                     skip = 1;
                     first_child = AFTER;
                   }

"<CONST"           { 
                     if (position == INTYPE) /* CONST on the spine */
                        position = INCONCL;
                     where = CONST;
                   }

"<MUTIND"          { 
                     if (position == INTYPE) /* MUTIND on the spine */
                        position = INCONCL;
                     where = MUTIND;
                   }

"<MUTCONSTRUCT"    { 
                     if (position == INTYPE) /* MUTCONSTRUCT on the spine */
                        position = INCONCL;
                     where = MUTCONSTRUCT;
                   }

"uri=\""{uri}      {     
                         if (!skip) {
                            uri=(char *)malloc((sizeof('a')*200)); 
                            strcpy(uri,yytext);
                            strsep(&uri,&sep);
                            if (where == CONST)
                              {
                                if (position == INCONCL)
                                  search(uri,first_child,position,spine_depth);
                                else search(uri,first_child,position,depth);
                                where = NOWHERE;
                                first_child = AFTER;
                                free(uri); 
                              };
                         } else skip = 0;
                   } 

"noType=\""{digits} {
                         if ((where == MUTIND) || (where == MUTCONSTRUCT))
                          { strsep(&yytext,&sep);
                            tmp=(char *)malloc((sizeof(sep)*(strlen(yytext)+1)));
                            strcpy(tmp,yytext);
                            tmp_n = atoi(tmp)+1;
                            sprintf(tmp,"%d",tmp_n);
                            strcat(uri,"#xpointer(1/"); 
                            strcat(uri,tmp); 
                          };
                         if (where == MUTIND) 
                             { 
                               strcat(uri,")");
                               if (position == INCONCL)
                                  search(uri,first_child,position,spine_depth);
                               else search(uri,first_child,position,depth);
                               free(uri);
                               free(tmp);
                               where = NOWHERE; 
                               first_child = AFTER;};
                   } 

"noConstr=\""{digits} {
                         if (where == MUTCONSTRUCT)
                          { strsep(&yytext,&sep);
                            tmp=(char *)malloc((sizeof(sep)*(strlen(yytext)+1)));
                            strcpy(tmp,yytext);
                            strcat(uri,"/");
                            strcat(uri,tmp);
                            strcat(uri,")");
                            if (position == INCONCL)
                              search(uri,first_child,position,spine_depth);
                            else search(uri,first_child,position,depth);
                            free(uri);
                            free(tmp);
                            where = NOWHERE; 
                            first_child = AFTER;};
                   } 



%%

 /***************************************************************/
 /* 6. Auxiliary functions.					*/
 /***************************************************************/

int main(int argc, char *argv[])
{                  
    struct stat buf;

    /* FILE *debug; */

    if (argc != 4)
    {
        fprintf(stderr, "Usage: meta <object_uri> <body_file> <type_file>\n");
        exit(1);
    }


    /* initialize the symbol table */
    init_symbol_table();

    // We process the body
    if (!stat(argv[2],&buf)) 
    {
        yyin = fopen(argv[2], "r");
        position = INBODY;
        yylex();
        fclose(yyin);
     }

    // We process the type
    yyin = fopen(argv[3], "r");
    position = INTYPE;
    first_child = HERE;
    no_open_source = 0;
    spine_depth = 0;
    depth = 0;
    yylex(); 
    fclose(yyin);
    print_all(argv[1]);

    return 0;
} 


void search(uri,first_child,position,depth)
char               *uri;
int                first_child;
int                position; 
{                  
                   if (position == MAINHYP)
                      { 
                       if (first_child == HERE) 
                           found = search_bucket(uri,MAINHYP,depth);
                       else 
                           found = search_bucket(uri,INHYP,0);
                      }
                   else if (position == INCONCL)
                      { 
                       if (first_child == HERE) 
                           found = search_bucket(uri,MAINCONCL,depth);
                       else
                           found = search_bucket(uri,INCONCL,0);
                      }
                        
                   else 
                      found = search_bucket(uri,position,depth);
                   /*
                   if (found == NOTFOUND)
                         fprintf(stderr,"here = %d, pos = %d, uri = %s\n", first_child,position, uri); */
} 
/*                  
                      (first_child == HERE) 
                      {
                       if (position == MAINHYP)
                          found = search_bucket(uri,MAINHYP,depth);
                       else if (position == INCONCL)
                          found = search_bucket(uri,MAINCONCL,0);
                       else if (position == INHYP)
                          found = search_bucket(uri,INHYP,0);
                          if (found == NOTFOUND)
                          printf( "pos = %d, uri = %s\n", MAINCONCL, uri); 
                       }
                   else if ((position == MAINHYP) && (first_child == AFTER))
                        found = search_bucket(uri,INHYP,0);
                   else found = search_bucket(uri,position,0);
                   if (found == NOTFOUND)
                         printf( "pos = %d, uri = %s\n", position, uri); 
                   } */

int yywrap() {
               return 1;
             }