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.

 */

/* line input / output / translation routines

 * and error routines

 */

#include <stdarg.h>

#include "../Lib/libwims.h"

#include "oef2wims.h"

/* critical error situation */

void error(char *s)

{

    /* fputs(s,stderr); */

    if(badpar!=NULL) {

     char *p; int i,t,v;

     char buf[128];

     for(p=inpbuf,t=1;p<badpar;p++) if(*p=='\n') t++;

     for(p=badpar-1;p>=inpbuf && *p!='\n'; p--);

     p++; v=badpar-p+1;

     snprintf(buf,sizeof(buf),"%s",p);

     for(i=0,p=buf;i<3 && *p;p++) if(*p=='\n') i++;

     *p=0;

     printf("\nERROR %s '%c' at line %d col %d.\n",

           s,*badpar,t,v);

     for(i=1;i<v;i++) putchar(' ');

     printf("!\n%s\n",buf);

    }

    else printf("\nERROR %s\n",s);

    exit(1);

}

char *substit(char *p)

{

    char *pp;

    while((pp=strchr(p,'$'))!=NULL) *pp=' ';

    return p;

}

/* replace newline by tab */

void replace_newline(char *p)

{

    for(;*p;p++) {

     if(*p=='   ') *p=' ';

     if(*p=='\n') *p='  ';

    }

}

/* variable substitution. buffer p must have MAX_LINELEN */

void subst(char *p)

{

    char *pp, *pe, nbuf[MAX_NAMELEN];

    int i;

    for(pp=p;pp-p<MAX_LINELEN && *pp; pp++) {

     if(*pp=='$') {

         string_modify(p,pp,pp+1,"$");

         pp+=3;

         continue;

     }

     if(*pp=='!' && isalnum(*(pp+1))) {

         string_modify(p,pp,pp+1,"!");

         pp+=3; continue;

     }

     if(*pp!='\\') continue;

     if(*(pp+1)=='\\') {

         pp++; continue;

     }

     if(!isalpha(*(pp+1))) continue;

     for(pe=pp+1;isalnum(*pe) || *pe=='_'; pe++);

     if(pe-pp>=MAX_NAMELEN) continue;

     memmove(nbuf,pp+1,pe-pp-1);nbuf[pe-pp-1]=0;

     for(i=varcnt-1;i>=1 && strcmp(nbuf,param[i].name)!=0;i--);

     if(i>=1) {

         if(deftag) param[i].save=1;

         if(*pe=='[') {

          char *pt, tbuf[MAX_LINELEN+1], vbuf[MAX_LINELEN+1];

          int l;

          pt=find_matching(pe+1,']'); if(pt!=NULL && pt-pe<MAX_LINELEN) {

              pe++; memmove(tbuf,pe,pt-pe); tbuf[pt-pe]=0; pe=pt+1;

              subst(tbuf);

              for(pt=strchr(tbuf,'\\');pt;pt=strchr(pt,'\\'))

                string_modify(tbuf,pt,pt+1,"$m_");

              snprintf(vbuf,sizeof(vbuf),"$(val%d[%s])",i,tbuf);

              l=strlen(vbuf);

              string_modify(p,pp,pe,"%s",vbuf);

              pp+=l-1;continue;

          }

         }

         string_modify(p,pp,pe,"$val%d",i);

     }

     else if(wordchr(mdef,nbuf)!=NULL) string_modify(p,pp,pp+1,"$m_");

    }

}

void repsubst(char *p)

{

    char *p1;

    for(p1=strstr(p,"\\reply"); p1!=NULL; p1=strstr(p1+1,"\\reply")) {

     if(p1>p && *(p1-1)=='\\') continue;

     string_modify(p,p1,p1+strlen("\\reply"),"$m_reply");

    }

    for(p1=strstr(p,"\\result"); p1!=NULL; p1=strstr(p1+1,"\\result")) {

     if(p1>p && *(p1-1)=='\\') continue;

     string_modify(p,p1,p1+strlen("\\result"),"$m_result");

    }

    for(p1=strstr(p,"\\choice"); p1!=NULL; p1=strstr(p1+1,"\\choice")) {

     if(p1>p && *(p1-1)=='\\') continue;

     string_modify(p,p1,p1+strlen("\\choice"),"$m_choice");

    }

    for(p1=strstr(p,"\\step"); p1!=NULL; p1=strstr(p1+1,"\\step")) {

     if(p1>p && *(p1-1)=='\\') continue;

     string_modify(p,p1,p1+strlen("\\step"),"$m_step");

    }

    for(p1=strstr(p,"\\sc_reply"); p1!=NULL; p1=strstr(p1+1,"\\sc_reply")) {

     if(p1>p && *(p1-1)=='\\') continue;

     string_modify(p,p1,p1+strlen("\\sc_reply"),"$m_sc_reply");

    }

    for(p1=strstr(p,"\\sc_choice"); p1!=NULL; p1=strstr(p1+1,"\\sc_choice")) {

     if(p1>p && *(p1-1)=='\\') continue;

     string_modify(p,p1,p1+strlen("\\sc_choice"),"$m_sc_choice");

    }

    for(p1=strstr(p,"\\reply_"); p1!=NULL; p1=strstr(p1+1,"\\reply_")) {

     if(p1>p && *(p1-1)=='\\') continue;

     string_modify(p,p1,p1+strlen("\\reply_"),"$m_reply_");

    }

}

/* find matching parenthesis.

 * The entrance point should be after the opening

 * parenthesis.

 * Returns NULL if unmatched.

 */

char *find_matching2(char *p, char c)

{

    char *pp, *pp2, *ppar,*pbrk, *pbrc;

    int parenth, brak, brace;

    if(c=='|') {

     for(pp=p;*pp!=0;pp++) {

         pp2=pp;

         switch(*pp) {

          case '|': return pp;

          case '(': {

              pp=find_matching(pp+1,')');

              if(pp==NULL) {if(badpar==NULL) badpar=pp2; return NULL;}

              break;

          }

          case '[': {

              pp=find_matching(pp+1,']');

              if(pp==NULL) {if(badpar==NULL) badpar=pp2; return NULL;}

              break;

          }

          case '{': {

              pp=find_matching(pp+1,'}');

              if(pp==NULL) {if(badpar==NULL) badpar=pp2; return NULL;}

              break;

          }

          case ')':

          case ']':

          case '}': badpar=pp; return NULL;

          default: break;

         }

     }

     return NULL;

    }

    parenth=brak=brace=0; ppar=pbrc=pbrk=NULL;

    for(pp=p; *pp!=0; pp++) {

     switch(*pp) {

         case '[': if(brak==0) pbrk=pp; brak++; break;

         case ']': brak--; break;

         case '(': if(parenth==0) ppar=pp; parenth++; break;

         case ')': parenth--; break;

         case '{': if(brace==0) pbrc=pp; brace++; break;

         case '}': brace--; break;

         default: continue;

     }

     if(parenth<0 || brak<0 || brace<0) {

         if(badpar==NULL) {

          if(parenth>0) badpar=ppar;

          if(brace>0) badpar=pbrc;

          if(brak>0) badpar=pbrk;

         }

         if(parenth>0 || brak>0 || brace>0) return NULL;

         if(*pp!=c) {

          if(badpar==NULL) badpar=pp; return NULL;

         }

         else break;

     }

    }

    if(*pp!=c) return NULL;

    return pp;

}

/* Check whether parentheses are balanced in a given string.

 * Returns 0 if OK.

 * style=0: simple check. style<>0: strong check.

 */

int checkparentheses(char *p, int style)

{

    int i,j,k;

    j=strlen(p);

    if(j>=MAX_FILELEN) return 65535;

    if(style!=0) {

     char *pp, *pe, c;

     for(pp=p;pp<p+j;pp++) {

         switch (*pp) {

          case ')':

          case ']':

          case '}': {badpar=pp; return -1;}

          case '(': c=')'; goto find;

          case '[': c=']'; goto find;

          case '{': c='}';

          find: {

              pe=find_matching2(pp+1,c);

              if(pe==NULL) {

               if(badpar==NULL) badpar=pp;

               return 1;

              }

              else pp=pe;

          }

          default: break;

         }

     }

     return 0;

    }

    for(i=k=0;i<j && k>=0;i++) {

     if(*(p+i)=='(') k++;

    if(*(p+i)==')') k--;

    }

    return k;

}