helm/metadata/create_V7_mowgli/METADATA/sthandler.c

   1 /*********************************************************************/
   2 /*  Copyright (C) 2000, HELM Team                                    */
   3 /*                                                                   */
   4 /* This file is part of HELM, an Hypertextual, Electronic            */
   5 /* Library of Mathematics, developed at the Computer Science         */
   6 /* Department, University of Bologna, Italy.                         */
   7 /*                                                                   */
   8 /* HELM is free software; you can redistribute it and/or             */
   9 /* modify it under the terms of the GNU General Public License       */
  10 /* as published by the Free Software Foundation; either version 2    */
  11 /* of the License, or (at your option) any later version.            */
  12 /*                                                                   */
  13 /* HELM is distributed in the hope that it will be useful,           */
  14 /* but WITHOUT ANY WARRANTY; without even the implied warranty of    */
  15 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the     */
  16 /* GNU General Public License for more details.                      */
  17 /*                                                                   */
  18 /* You should have received a copy of the GNU General Public License */
  19 /* along with HELM; if not, write to the Free Software               */
  20 /* Foundation, Inc., 59 Temple Place - Suite 330, Boston,            */
  21 /* MA  02111-1307, USA.                                              */
  22 /*                                                                   */
  23 /* For details, see the HELM World-Wide-Web page,                    */
  24 /* http://cs.unibo.it/helm/.                                         */
  25  /*********************************************************************/
  26
  27 /****************************************************************/
  28 /*                        STHANDLER.C                           */
  29 /****************************************************************/
  30 /* This module supplies routines for symbol table handling.     */
  31 /* - init_symbol_table(): it initializes the symbol table       */
  32 /*                        to void.                              */
  33 /* - search_bucket(): it searches the symbol table for the      */
  34 /*                    bucket containing a given identifier, and */
  35 /*                    inserts it if it is not present;          */
  36 /****************************************************************/
  37 /*           First draft 11/12/2001, by Andrea Asperti          */
  38 /****************************************************************/
  39
  40 /****************************************************************/
  41 /* 1. Inclusion of header files.                                */
  42 /****************************************************************/
  43
  44 #include                <stdio.h>
  45 #include                <malloc.h>
  46
  47 /****************************************************************/
  48 /* 2. Declarations                                              */
  49 /****************************************************************/
  50
  51
  52 #define         DICTSIZE                        211
  53 #define         HASH1                           4
  54 #define         HASH2                           0xf0000000
  55 #define         HASH3                           24
  56 #define         EOS                             '\0'
  57
  58 #define                 INBODY    0
  59 #define                 MAINHYP   1
  60 #define                 INHYP     2
  61 #define                 INCONCL   3
  62 #define                 MAINCONCL 4
  63 #define                 INTYPE    5
  64 #define                 NOTFOUND  6
  65
  66 /****************************************************************/
  67 /* 3. Types.                                                    */
  68 /****************************************************************/
  69
  70 struct int_list {
  71                 int                     val;
  72                 struct int_list         *next;
  73                   };
  74
  75 struct st_bucket {
  76                 char                    *id;
  77                                                 /* identifier */
  78                 int                     main_depth;
  79                 struct int_list         *depths;
  80                 struct st_bucket        *next_st_bucket;
  81                                                 /* next bucket in the list */
  82                 struct st_bucket        *all_next;
  83                                                /* all buckets in symbol
  84                                                   table are linked together */
  85                 int                     pos[5];
  86
  87                   };
  88
  89 struct st_bucket    *dictionary[DICTSIZE];
  90                                /* pointers to bucket lists */
  91
  92 /****************************************************************/
  93 /* 4. Local functions.                                          */
  94 /****************************************************************/
  95 struct int_list  *add(struct int_list  *,int);
  96
  97 /****************************************************************/
  98 /* 5. Definitions of functions to be exported.                  */
  99 /****************************************************************/
 100
 101 struct st_bucket        *all;
 102
 103  /* The following function initializes the symbol table to NULL */
 104 void init_symbol_table()
 105 {
 106         struct st_bucket        *st;
 107         int                     i;
 108
 109         /* initialize the dictionary */
 110         for (i = 0; i < DICTSIZE; i++)
 111                 dictionary[i] = NULL;
 112         all = NULL;
 113 }
 114
 115  /* The following function searches the symbol table for an identifier */
 116  /* and inserts it if it is not present.
 117  /* The bucket associated with the given identifier */
 118  /* becomes the first one in its list. */
 119
 120 search_bucket(id, where, depth)
 121         char            *id;
 122                                         /* identifier */
 123         int             where;
 124         int             depth;
 125 {
 126         int             dict_index;
 127                                         /* value returned by the */
 128                                         /* hash function */
 129         struct st_bucket
 130                         *prev,
 131                         *curr;
 132
 133         struct st_bucket *st;
 134
 135         /* apply the hash function */
 136         dict_index = hash_pjw(id);
 137         /* fprintf(stderr,"%d\n", dict_index); */
 138
 139         /* scan the bucket list indicated by the hash function */
 140         prev = curr = dictionary[dict_index];
 141         while ((curr != NULL) && (strcmp(id, curr->id)))
 142           {
 143             prev = curr;
 144             curr = curr->next_st_bucket;
 145           }
 146         if (curr == NULL)
 147           /* the identifier is not in the list */
 148           {
 149             allocate_bucket(&st,id,where);
 150             if (where == MAINCONCL)
 151               st->main_depth = depth;
 152             else if (where == MAINHYP)
 153               st->depths = add(st->depths,depth);
 154             move_bucket(st,dict_index);
 155             return NOTFOUND;
 156           }
 157         else
 158           /*
 159              printf("uno=%s\n", id);
 160              printf("st=%s\n", curr->id); fflush(stdout) */
 161
 162           /* the identifier is already in the list */
 163           {
 164             /* st = curr; */
 165             curr->pos[where] = 1;
 166             if (where >= 1)
 167               curr->pos[INBODY] = 0; /* it will never be set again to 1 */
 168             if (where == MAINHYP)
 169               curr->depths=add(curr->depths,depth);
 170             else if (where == MAINCONCL)
 171               curr->main_depth = depth;
 172             if (prev != curr)
 173               /* the identifier is not in the first position */
 174               {
 175                 prev->next_st_bucket = curr->next_st_bucket;
 176                 move_bucket(curr,
 177                             dict_index);
 178               };
 179             return where;
 180           }
 181 }
 182
 183 print_all(about,outrel,outsort)
 184      char       *about;
 185      FILE       *outrel,
 186                 *outsort;
 187 {
 188
 189         int i;
 190         struct st_bucket *curr;
 191         curr = all;
 192         printf("printall\n"); fflush(stdout);
 193         while (curr != NULL)
 194           {
 195             for (i = 0; i < 5; ++i)
 196               if ((curr->pos[i]) == 1)
 197                 {
 198                   if (i == MAINHYP)
 199                     print_mainhyp(about,outrel,outsort,curr->id,curr->depths);
 200                   else if (i == MAINCONCL)
 201                     print_mainconcl(about,outrel,outsort,curr->id,curr->main_depth);
 202                   else
 203                     print_one(curr->id,i);
 204                 }
 205             curr = curr->all_next;
 206           }
 207 }
 208
 209
 210 /****************************************************************/
 211 /* 5. Definitions of functions local to the module.             */
 212 /****************************************************************/
 213
 214 struct int_list  *add(l,m)
 215      struct int_list    *l;
 216      int                m;
 217 {
 218         struct int_list *curr;
 219         /* scan the list looking for m */
 220         curr = l;
 221         while ((curr != NULL) && (m != (curr->val)))
 222             curr = curr->next;
 223         if (curr == NULL)
 224           /* m is not in the list */
 225           {
 226             curr = (struct int_list *)malloc(sizeof(struct int_list));
 227             curr->val = m;
 228             curr->next = l;
 229             return curr;
 230           }
 231         else
 232         return l;
 233
 234 }
 235
 236 print_mainhyp(about,outrel,outsort,uri,l)
 237      char                *about;
 238      FILE                *outrel,
 239                          *outsort;
 240      char                *uri;
 241      struct int_list     *l;
 242 {
 243     struct int_list *curr;
 244     curr = l;
 245     if (!strcmp(uri,"Rel"))
 246       {
 247         fprintf(outrel,"\t<h:Object rdf:about=\"");
 248         fprintf(outrel,"%s",about);
 249         fprintf(outrel,"\">\n");
 250         /* scan the list */
 251         while (curr != NULL)
 252           {
 253             fprintf(outrel,"\t\t<h:refRel rdf:parseType=\"Resource\">");
 254             fprintf(outrel,"\n\t\t\t\t<h:position rdf:resource=\"&hns;MainHypothesis\"/>");
 255             fprintf(outrel,"\n\t\t\t\t<h:depth>%d</h:depth>",curr->val);
 256             fprintf(outrel,"\n\t\t</h:refRel>\n");
 257             curr = curr->next;
 258           }
 259         fprintf(outrel,"\t</h:Object>\n");
 260       }
 261    else if ((!strcmp(uri,"Prop")) || (!strcmp(uri,"Type")) ||
 262             (!strcmp(uri,"Set")))
 263       {
 264         /* scan the list */
 265         fprintf(outsort,"\t<h:Object rdf:about=\"");
 266         fprintf(outsort,"%s",about);
 267         fprintf(outsort,"\">\n");
 268         while (curr != NULL)
 269           {
 270             fprintf(outsort,"\t\t<h:refSort rdf:parseType=\"Resource\">");
 271             fprintf(outsort,"\n\t\t\t\t<h:position rdf:resource=\"&hns;MainHypothesis\"/>");
 272             fprintf(outsort,"\n\t\t\t\t<h:sort rdf:resource=\"&hns;%s\">",uri);
 273             fprintf(outsort,"\n\t\t\t\t<h:depth>%d</h:depth>",curr->val);
 274             fprintf(outsort,"\n\t\t</h:refSort>\n");
 275             curr = curr->next;
 276           }
 277         fprintf(outsort,"\t</h:Object>\n");
 278       }
 279     else
 280      {
 281         /* scan the list */
 282         while (curr != NULL)
 283           {
 284             printf("\t\t<h:refObj rdf:parseType=\"Resource\">");
 285             printf("\n\t\t\t\t<h:position rdf:resource=\"&hns;MainHypothesis\"/>");
 286             printf("\n\t\t\t\t<h:depth>%d</h:depth>",curr->val);
 287             printf("\n\t\t\t\t<h:occurrence><h:Object rdf:about=\"%s\"/></h:occurrence>",uri);
 288             printf("\n\t\t</h:refObj>\n");
 289             curr = curr->next;
 290           }
 291       }
 292 }
 293
 294 print_mainconcl(about,outrel,outsort,uri,depth)
 295      char    *about;
 296      FILE    *outrel,
 297              *outsort;
 298      char    *uri;
 299      int     depth;
 300
 301 {
 302     if (!strcmp(uri,"Rel"))
 303       {
 304         fprintf(outrel,"\t<h:Object rdf:about=\"");
 305         fprintf(outrel,"%s",about);
 306         fprintf(outrel,"\">\n");
 307         fprintf(outrel,"\t\t<h:refRel rdf:parseType=\"Resource\">");
 308         fprintf(outrel,"\n\t\t\t\t<h:position rdf:resource=\"&hns;MainConclusion\"/>");
 309         fprintf(outrel,"\n\t\t\t\t<h:depth>%d</h:depth>",depth);
 310         fprintf(outrel,"\n\t\t</h:refObj>\n");
 311         fprintf(outrel,"\t</h:Object>\n");
 312       }
 313     else if ((!strcmp(uri,"Prop")) || (!strcmp(uri,"Type")) ||
 314             (!strcmp(uri,"Set")))
 315       {
 316         fprintf(outsort,"\t<h:Object rdf:about=\"");
 317         fprintf(outsort,"%s",about);
 318         fprintf(outsort,"\">\n");
 319         fprintf(outsort,"\t\t<h:refSort rdf:parseType=\"Resource\">");
 320         fprintf(outsort,"\n\t\t\t\t<h:position rdf:resource=\"&hns;MainConclusion\"/>");
 321         fprintf(outsort,"\n\t\t\t\t<h:sort>%s</h:sort>",uri);
 322         fprintf(outsort,"\n\t\t\t\t<h:depth>%d</h:depth>",depth);
 323         fprintf(outsort,"\n\t\t</h:refSort>\n");
 324         fprintf(outsort,"\t</h:Object>\n");
 325       }
 326     else
 327       {
 328         printf("\t\t<h:refObj rdf:parseType=\"Resource\">");
 329         printf("\n\t\t\t\t<h:position rdf:resource=\"&hns;MainConclusion\"/>");
 330         printf("\n\t\t\t\t<h:occurrence><h:Object rdf:about=\"%s\"/></h:occurrence>",uri);
 331         printf("\n\t\t\t\t<h:depth>%d</h:depth>",depth);
 332         printf("\n\t\t</h:refObj>\n");
 333       }
 334 }
 335
 336 // dome: cambiata per usare il modello con position
 337 print_one(uri,pos)
 338      char    *uri;
 339      int     pos;
 340 {
 341     printf("\t\t<h:refObj rdf:parseType=\"Resource\">");
 342     printf("\n\t\t\t\t<h:position rdf:resource=\"&hns;");
 343     if (pos == INBODY)
 344        printf("InBody");
 345     else if (pos == MAINHYP)
 346        printf("MainHypothesis");
 347     else if (pos == INHYP)
 348        printf("InHypothesis");
 349     else if (pos == INCONCL)
 350        printf("InConclusion");
 351     else if (pos == MAINCONCL)
 352        printf("MainConclusion");
 353     printf("\"/>\n\t\t\t\t<h:occurrence><h:Object rdf:about=\"%s\"/></h:occurrence>\n\t\t</h:refObj>\n", uri);
 354 }
 355
 356  /* The following function allocates a bucket for an identifier. */
 357 allocate_bucket(st, id, where)
 358         struct st_bucket
 359                         **st;
 360                                         /* pointer to the bucket to be */
 361                                         /* allocated */
 362         char            *id;
 363                                         /* identifier */
 364         int             where;
 365 {
 366         int i;
 367
 368         *st = (struct st_bucket *)malloc(sizeof(struct st_bucket));
 369         (*st)->id = (char *)malloc(sizeof('a')*(strlen(id) + 1));
 370         strcpy((*st)->id,id);
 371         (*st)->main_depth = 0;
 372         (*st)->depths = NULL;
 373         (*st)->next_st_bucket = NULL;
 374         (*st)->all_next = all;
 375         all = *st;
 376         for (i = 0; i < 5; ++i)
 377           (*st)->pos[i] = 0;
 378         (*st)->pos[where] = 1;
 379 }
 380
 381  /* The following function moves a bucket to the head of the */
 382  /* list in which it lies. */
 383 move_bucket(st, dict_index)
 384         struct st_bucket
 385                         *st;
 386                                         /* pointer to the bucket to */
 387                                         /* be moved */
 388         int             dict_index;
 389                                         /* index corresponding to */
 390                                         /* the list in which the */
 391                                         /* bucket lies */
 392 {
 393         st->next_st_bucket = dictionary[dict_index];
 394         dictionary[dict_index] = st;
 395 }
 396
 397  /* The following function implements Weinberger's hash function. */
 398 int
 399 hash_pjw(id)
 400         char            *id;
 401                                         /* identifier to be hashed */
 402 {
 403         unsigned        h,
 404                         g;
 405
 406         for (h = 0; *id != EOS; id++)
 407         {
 408                 h = (h << HASH1) + (*id);
 409                 if (g = h & HASH2)
 410                         h = h ^ (g >> HASH3) ^ g;
 411         }
 412         return(h % DICTSIZE);
 413 }
 414
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