Subversion Repositories wimsdev

/*    Copyright (C) 1998-2003 XIAO, Gang of Universite de Nice - Sophia Antipolis

 *

 *  This program 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.

 *

 *  This program 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 this program; if not, write to the Free Software

 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 */

/* Caches and its management */

#include "wimslogd.h"

struct classdata classdata[MAX_CLASSCACHE];

struct classcache {

  struct classdata *ptr;

} classcache[MAX_CLASSCACHE];

int classcaches;

/* remove old cache items */

void cleancache(void)

{

  int i;

  time_t now;

  struct classdata *cd;

  now=time(NULL);

  for(i=0;i<classcaches;i++) {

    cd=classcache[i].ptr;

    if(now<cd->start+CLASSCACHE_DELAY) continue;

    cd->access=0;

    memmove(classcache+i,classcache+i+1,(classcaches-i-1)*sizeof(classcache[0]));

    classcaches--;

  }

}

void class_dump(struct classdata *cd)

{

 int i, j, k, nb;

 char *s;

 exodata *ed;

 my_debug("Classe: %s\n", cd->name);

 my_debug("Feuilles: %i, Exercices: %i\n", cd->sheetcnt, cd->exocnt);

 for (i=0;i<cd->sheetcnt;i++)

 {

   my_debug("Feuille %i: %i exercices\n",i+1,cd->sheets[i].exocnt);

   nb=cd->sheets[i].techcnt;

   if (nb==1)

     my_debug("Pas de variable technique\n");

   else

     {

       s = cd->techs+cd->sheets[i].techoffset;

       my_debug("Variable technique: %s, %i valeurs (actuel: %i)\n",s,nb,cd->sheets[i].techval);

       s += strlen(s); s++;

        for (j = 0; j < nb;j++)

        {

         my_debug("%s ",s);  s += strlen(s); s++;

        }

       my_debug("\n");

     }

   ed = cd->exos + cd->sheets[i].indstart;

   for (j = 0; j < nb; j++)

   {

     for (k = 0; k < cd->sheets[i].exocnt; k++, ed++)

       my_debug("[a: %i r: %f w:%f] ", ed->active, ed->require, ed->weight);

     my_debug("\n");

   }

 }

 if (cd->exam.exocnt>0)

 {

    ed = cd->exos + cd->exam.indstart;

    my_debug("Examen: %i exercices\n", cd->exam.exocnt);

    for (k = 0; k < cd->exam.exocnt; k++, ed++)

       my_debug("[a: %i r: %f w:%f] ", ed->active, ed->require, ed->weight);

     my_debug("\n");

 }

 else

   my_debug("Pas d'examen\n");

 my_debug("Fin de la classe\n");

}

/* Locate the cache number of a class */

struct classdata *getclasscache(char *cl)

{

  int i,j,k,l,m,n, oldest, offset;

  struct stat st;

  struct classdata *cd;

  char buf[MAX_LINELEN+1], buf2[MAX_LINELEN+1];

  char *p1, *p2, *p3, *q1, *q2;

  time_t tt;

  tt=0, oldest=0;

  for(i=0;i<classcaches;i++) {

    cd=classcache[i].ptr;

    if(tt>cd->start) {tt=cd->start; oldest=i;}

    if(strcmp(cd->name,cl)==0) {

      cd->access++;

      return cd;

    }

  }

  if(classcaches>=MAX_CLASSCACHE) {

    i=oldest;cd=classcache[i].ptr;

    cd->access=0;

    memmove(classcache+i,classcache+i+1,(classcaches-i-1)*sizeof(classcache[0]));

    classcaches--;

  }

  for(i=0;i<MAX_CLASSCACHE && classdata[i].access>0; i++);

  if(i>classcaches) return NULL;

  cd=classdata+i; cd->access=1;

  classcache[classcaches++].ptr=cd;

  snprintf(cd->name,sizeof(cd->name),"%s",cl);

  cd->techs[0]=0; offset=1;

  cd->start=time(NULL); cd->exocnt=0;

  /* Now get the exo data */

  wlogdaccessfile(buf,"r","sheets/.require");

  p1=strchr (buf,':');

  if (p1==NULL) {

    for(i=k=0,p1=buf; *p1; i++,p1=p2) {

      cd->sheets[i].start=cd->sheets[i].indstart=k;

      p2=strchr(p1,'\n'); if(p2) *p2++=0; else p2=p1+strlen(p1);

      for(j=0,q1=find_word_start(p1); *q1 && k<MAX_CLASSEXOS; j++,q1=find_word_start(q2)) {

        q2=find_word_end(q1); if(*q2) *q2++=0;

        cd->exos[k].require=atof(q1);

        cd->exos[k].weight=0;

        cd->exos[k].active=1;

        k++;

      }

      cd->sheets[i].exocnt=j;

      cd->exocnt +=j;

      cd->sheets[i].techcnt=1;

   }

    cd->sheetcnt=i;

  }

  else {

  /* i: sheet, k: exo numero counted with multiplicity, l: tech version*/

    for (i=k=0,p1++; *p1; i++,p1=p2) {

      cd->sheets[i].indstart=k; /* numero of the first exo of the i sheet with multiplicity */

      cd->sheets[i].start=cd->exocnt;

      p2=strchr(p1,':'); if(p2) *p2++=0; else p2=p1+strlen(p1);

      for (l=0; *p1; l++,p1=p3) {

        p3=strchr(p1,'\n'); if(p3) *p3++=0; else p3=p1+strlen(p1);

        for(j=0,q1=find_word_start(p1); *q1 && k<MAX_CLASSEXOS; j++,q1=find_word_start(q2)) {

          q2=find_word_end(q1); if(*q2) *q2++=0;

          cd->exos[k].require=atof(q1);

          /* default values, will be changed after reading the appropriate file */

          cd->exos[k].weight=0;

          cd->exos[k].active=1;

          k++;

        }

      }

      cd->sheets[i].exocnt=j; /* number of exos in the sheet i */

      cd->exocnt+=j; /* total number of exos sans multiplicité */

      cd->sheets[i].techcnt=l; //nombre de lignes=nombre de variables techniques,

    }

    cd->sheetcnt=i; /* number of sheets */

  }

  if(k>=MAX_CLASSEXOS) return NULL;

  cd->examstart=cd->exocnt; // nb exos sans multipl. dans les feuilles précédant l'examen

  cd->examcnt=0;

  cd->exam.indstart=k;

  cd->exam.start=cd->exocnt;

  cd->exam.exocnt=0;

  cd->modif=0;

  wlogdaccessfile(buf,"r","sheets/.weight");

  p1=strchr (buf,':');

  /*old format*/

  if (p1==NULL)

    for(i=k=0,p1=buf; *p1; i++,p1=p2) {

      p2=strchr(p1,'\n'); if(p2) *p2++=0; else p2=p1+strlen(p1);

      for(j=0,q1=find_word_start(p1); *q1 && k<MAX_CLASSEXOS; j++,q1=find_word_start(q2)) {

        q2=find_word_end(q1); if(*q2) *q2++=0;

        cd->exos[k].weight=atof(q1);

        k++;

      }

    }

  else

    for (i=k=0,p1++; *p1; i++,p1=p2) {

      p2=strchr(p1,':'); if(p2) *p2++=0; else p2=p1+strlen(p1);

      for (; *p1; p1=p3) {

        p3=strchr(p1,'\n'); if(p3) *p3++=0; else p3=p1+strlen(p1);

        for(q1=find_word_start(p1); *q1 && k<MAX_CLASSEXOS;q1=find_word_start(q2)) {

          q2=find_word_end(q1); if(*q2) *q2++=0;

          cd->exos[k].weight=atof(q1);

          k++;

        }

      }

    }

  if(stat("sheets/.vars",&st)==0) {

    wlogdaccessfile(buf,"r","sheets/.vars");

    p1=strchr (buf,':');

    for (i=0; i < cd->sheetcnt; i++, p1=p2){

      p1++;

      cd->sheets[i].techoffset=0;

      p2=strchr(p1,'\n'); if(p2) *p2++=0; else p2=p1+strlen(p1);

      if (cd->sheets[i].techcnt == 0) continue;

      cd->sheets[i].techoffset=offset;

      for(l=0; l <= cd->sheets[i].techcnt;l++,p1=q2) {

        p1=find_word_start(p1);

        q2=find_word_end(p1); if(*q2) *q2++=0;

        strcpy(cd->techs+offset,p1);

        offset+=strlen(p1); offset++;

      }

    }

    wlogdaccessfile(buf,"r","sheets/.active");

    p1=strchr (buf,':');

    for (i=k=0,p1++; *p1; i++,p1=p2) {

      p2=strchr(p1,':'); if(p2) *p2++=0; else p2=p1+strlen(p1);

      for (; *p1; p1=p3) {

        p3=strchr(p1,'\n'); if(p3) *p3++=0; else p3=p1+strlen(p1);

        for(q1=find_word_start(p1); *q1 && k<MAX_CLASSEXOS;q1=find_word_start(q2)) {

          q2=find_word_end(q1); if(*q2) *q2++=0;

          cd->exos[k].active=strcmp(q1,"0");

          k++;

        }

      }

    }

  }

  //class_dump(cd);

  if(stat("exams/.exams",&st)==0) cd->modif=st.st_mtime; else return cd;

  wlogdaccessfile(buf,"r","exams/.exams");

  if(buf[0]==0) return cd;

  if(buf[0]==':') p1=buf-1; else p1=strstr(buf,"\n:");

  for(n=m=0,k=cd->exam.indstart; p1 && k<MAX_CLASSEXOS && m<MAX_EXOS; p1=p2,m++,k++) {

    p1+=2;

    p2=strstr(p1,"\n:"); if(p2) *p2=0;

    //      if(*find_word_start(p1)<'1') continue;      /* status */

    fnd_line(p1,3,buf2); if(buf2[0]==0) continue;

    q1=find_word_start(buf2); q2=find_word_end(q1);

    if(*q2) *q2++=0;

    q2=find_word_start(q2); *find_word_end(q2)=0;

    i=atoi(q1); j=atoi(q2); if(i<=0 || j<=0) continue;

    cd->exos[k].weight=i; cd->exos[k].require=j;      /* weight: duration. require: retries */

    fnd_line(p1,6,buf2); q1=find_word_start(buf2);

    singlespace(q1); strip_trailing_spaces(q1);

    cd->ctptr[m]=n; cd->ctbuf[n]=0;

    if(n+strlen(q1)>CTBUFLEN-MAX_EXOS-16) *q1=0;      /* silent truncation */

    l=strlen(q1)+1; memmove(cd->ctbuf+n,q1,l); n+=l;

  }

  cd->examcnt=m; // number of exos in all exams

  cd->exocnt+=m; // number of all exos without multiplicity

  cd->exam.exocnt=m;

  cd->sheets[cd->sheetcnt]=cd->exam;

  return cd;

}