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    1: /* The LearningOnline Network with CAPA 
    2:  * CAPA wrapper code
    3:  * $Id: caparesponse.c,v 1.7 2001/12/04 15:17:57 albertel Exp $
    4:  *
    5:  * Copyright Michigan State University Board of Trustees
    6:  *
    7:  * This file is part of the LearningOnline Network with CAPA (LON-CAPA).
    8:  *
    9:  * LON-CAPA is free software; you can redistribute it and/or modify
   10:  * it under the terms of the GNU General Public License as published by
   11:  * the Free Software Foundation; either version 2 of the License, or
   12:  * (at your option) any later version.
   13:  *
   14:  * LON-CAPA is distributed in the hope that it will be useful,
   15:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   16:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   17:  * GNU General Public License for more details.
   18:  *
   19:  * You should have received a copy of the GNU General Public License
   20:  * along with LON-CAPA; if not, write to the Free Software
   21:  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   22:  *
   23:  * /home/httpd/html/adm/gpl.txt
   24:  *
   25:  * http://www.lon-capa.org/
   26:  */
   27: 
   28: #include <capaCommon.h>
   29: #include <ranlib.h>
   30: 
   31: PointsList_t * parse_pts_list (char *pts_list) {
   32:   PointsList_t *new=NULL, *end=NULL, *beforeend=NULL, *rlist=NULL;
   33:   char *idx_pts=pts_list;
   34:   int done=0;
   35:   /*fprintf(stderr,"ids %s\n",id_list);
   36:     fprintf(stderr,"pts %s\n",pts_list);*/
   37:   while (!done) {
   38:     int idx;
   39:     /*fprintf(stderr,"pts; %s\n",idx_pts);*/
   40:     new=gen_ptslist_str(idx_pts);
   41:     if (!new) break;
   42:     if (!rlist) { rlist=new; }
   43:     if (end) { 
   44:       end->pts_next=new; 
   45:       idx=end->pts_idx;
   46:     } else {
   47:       idx=-1;
   48:     }
   49:     end=new;
   50:     while (end) {
   51:       idx++;
   52:       end->pts_idx=idx;
   53:       /*fprintf(stderr,"end is:%d:%d:%s:%d\n",idx,end->pts_idx,end->pts_str,
   54: 	end->pts_next);*/
   55:       beforeend=end;
   56:       end=end->pts_next;
   57:     }
   58:     end=beforeend;
   59:     idx_pts=strchr(idx_pts,';');
   60:     if (idx_pts) { idx_pts++; } else { done=1; }
   61:   }
   62:   
   63:   return rlist;
   64: }
   65: 
   66: int caparesponse_capa_check_answer(char *response,char *correct,
   67: 				   int type,int tol_type,double tolerance,
   68: 				   int sig_lbound,int sig_ubound, 
   69: 				   char *ans_fmt, char *unit_str,
   70: 				   int calc, char *id_list, char *pts_list, 
   71: 				   char *rndseed)
   72: 				   
   73: {
   74:   long result,seed1,seed2;
   75:   Problem_t p;
   76:   char *error=NULL,filename[FILE_NAME_LENGTH];
   77:   FILE *fp;
   78: 
   79:   /*fprintf(stderr,"hi in caparesponse\n");*/
   80:   /*need to initialize unit parser*/
   81:   sprintf(filename,"/home/httpd/html/res/adm/includes/capa.units");
   82:   if ((fp=fopen(filename,"r"))==NULL) {
   83:     /* printf("Error: can't open %s\n",filename);*/
   84:       return (-1); 
   85:   }
   86:   u_getunit(fp);
   87:   fclose(fp);
   88:   /* need to setup random generator (FIXME) should only do this if 
   89:      it hasn't been yet*/
   90:   phrtsd(rndseed,&seed1,&seed2);
   91:   setall(seed1,seed2);
   92: 
   93:   /* assign_id_list and assign_pts_list exist in capaGrammerDef.y */
   94:   p.id_list=NULL;
   95:   p.pts_list=NULL;
   96: 
   97:   if (type == ANSWER_IS_FORMULA) {
   98:     p.id_list=id_list;
   99:     p.pts_list=parse_pts_list(pts_list);
  100:   }
  101:   p.ans_type   = type;
  102:   p.answer     = correct;
  103:   p.tol_type   = tol_type;
  104:   p.tolerance  = tolerance;
  105:   p.sig_lbound = sig_lbound;
  106:   p.sig_ubound = sig_ubound;
  107:   strncpy(p.ans_fmt,ans_fmt,ANSWER_STRING_LENG-1);
  108:   if (unit_str[0]!='\0') {
  109:     strncpy(p.unit_str,unit_str,ANSWER_STRING_LENG-1);
  110:     p.ans_unit   = u_parse_unit(unit_str);
  111:   } else {
  112:     p.unit_str[0]='\0';
  113:     p.ans_unit=NULL;
  114:   }
  115:   p.calc       = calc;
  116: 
  117: 
  118:   result=capa_check_answer(&p,response,&error);
  119: 
  120:   if (error!=NULL) {free(error);}
  121: 
  122:   return result;
  123: }