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.

 */

void calc_itemof(char *p);

void calc_rowof(char *p);

void calc_columnof(char *p);

/* It is this routine which uses print_precision. */

void float2str(double d, char *p)

{

    char buf[16];

    int i;

    if(d==0) {

     ovlstrcpy(p,"0"); return;

    }

    if(!finite(d)) { /* isinf, isnan possibly not available */

     if (d == d) ovlstrcpy(p, (d > 0)? "Inf": "-Inf"); else ovlstrcpy(p,"NaN");

     return;

    }

    if(d<1000000 && d>-1000000 && d==floor(d)) {

     mystrncpy(p,int2str(d),MAX_LINELEN); return;

    }

    i=print_precision;

    if(i<2) i=2; if(i>32) i=32;  /* Simple limitation. */

    buf[0]='%';buf[1]='.';

    if(i>=10) {

     buf[2]='0'+i/10; buf[3]='0'+i%10; buf[4]='g'; buf[5]=0;

    }

    else {

     buf[2]='0'+i; buf[3]='g'; buf[4]=0;

    }

    snprintf(p,MAX_LINELEN,buf,(double) d);

    if(isspace(*p)) ovlstrcpy(p,find_word_start(p));

}

/* substitute variable names by their environment strings

 * The buffer pointed to by p must have enough space

 * (defined by MAX_LINELEN). */

char *substit(char *p)

{

    char *pp, *p2, *ev;

    char *oldlast, *oldnext, *oldend, *newend;

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

    int ln;

    if((p2=strchr(p,'$'))==NULL) return p;

    if(substnest>SUBST_LIMIT) module_error("subst_exceeded");

    ln=strlen(p); if(ln>=MAX_LINELEN) goto too_long;

    memmove(oldbuf,p,ln); oldbuf[ln]=0; oldend=oldbuf+ln;

    newend=p; oldlast=oldnext=oldbuf;

    for(pp=oldbuf+(p2-p); pp!=NULL; pp=strchr(pp,'$')) {

     if(*(pp+1)=='$') { /* escaped dollar sign */

         pp++; if(newend-p+(pp-oldlast)>=MAX_LINELEN) goto too_long;

         memmove(newend,oldlast,pp-oldlast); newend+=pp-oldlast;

         pp++; oldlast=pp; continue;

     }

     switch(*(pp+1)) {

         case 0: {

          *pp=0; oldend--; goto end;

         }

         case '(': {

          p2=find_matching(pp+2,')');

          if(p2==NULL) {

              module_error("unmatched_parentheses");

              *p=0; return p;

          }

          *p2++=0; oldnext=p2; memmove(buf,pp+2,p2-pp-2);

          substnest++; substit(buf); substnest--;

          break;

         }

         case '[': {

          double d;

          p2=find_matching(pp+2,']');

          if(p2==NULL) {

              module_error("unmatched_parentheses");

              *p=0; return p;

          }

          *p2=0; ovlstrcpy(buf,pp+2); oldnext=p2+1;

          substnest++; substit(buf); substnest--;

          d=evalue(buf); float2str(d,buf);

          goto replace;

         }

         default: {

          for(p2=pp+1; myisalnum(*p2) || *p2=='_'; p2++);

          oldnext=p2; memmove(buf,pp+1,p2-(pp+1)); buf[p2-(pp+1)]=0;

          goto noarray;

         }

     }

     if((p2=strchr(buf,'['))!=NULL) {

         char *pt1, tbuf[MAX_LINELEN+1];

         *p2++=0; pt1=find_matching(p2,']');

         if(pt1==NULL) {buf[0]=0; goto replace;}

         *pt1=0; pt1=strchr(p2,';');

         if(pt1==NULL) {

          if(*find_word_start(p2)==0) {*p2=0; goto noarray;}

          snprintf(tbuf,sizeof(tbuf),"%s of $%s",p2,buf);

          calc_itemof(tbuf); ovlstrcpy(buf,tbuf); goto replace;

         }

         else {

          *pt1++=0; p2=find_word_start(p2);

          if(*p2) {

              snprintf(tbuf,sizeof(tbuf),"%s of $%s",p2,buf);

              calc_rowof(tbuf);

          }

          else {

              snprintf(tbuf,sizeof(tbuf),"$%s",buf); substit(tbuf);

          }

          if(*find_word_start(pt1)) {

              snprintf(buf,sizeof(buf),"%s of %s",pt1,tbuf);

              calc_columnof(buf); goto replace;

          }

          else ovlstrcpy(buf,tbuf);

          goto replace;

         }

     }

     noarray: ev=getvar(buf); ln=getvar_len;

     if(ev==NULL) ev=""; if(strchr(ev,'$')==NULL) goto rep2;

     memmove(buf,ev,ln); buf[ln]=0;

     substnest++; substit(buf); substnest--;

     replace: ev=buf; ln=strlen(ev);

     rep2:

     if(pp>oldlast) {

         if(newend-p+(pp-oldlast)>=MAX_LINELEN) goto too_long;

         memmove(newend,oldlast,pp-oldlast); newend+=pp-oldlast;

     }

     if(ln>0) {

         if((newend-p)+ln>=MAX_LINELEN) goto too_long;

         memmove(newend,ev,ln); newend+=ln;

     }

     pp=oldlast=oldnext;

     continue;

    }

    end:

    if(oldlast<oldend) {

     if(newend-p+(oldend-oldlast)>=MAX_LINELEN) goto too_long;

     memmove(newend,oldlast,oldend-oldlast); newend+=oldend-oldlast;

    }

    *newend=0; return p;

    too_long: user_error("cmd_output_too_long"); return NULL;

}

enum {for_in, for_from};

struct {

    char var[MAX_NAMELEN+1];

    int type;

    double list[MAX_VALUE_LIST];

    char *pos[MAX_VALUE_LIST];

    double from, to, step;

} forstruct;

int for_getvar(char *p)

{

    char *vp, buf[MAX_LINELEN+1];

    mystrncpy(buf,p,sizeof(buf)); substit(buf);

    vp=find_word_start(buf); for(p=vp; myisalnum(*p) || *p=='_'; p++);

    *p=0; if(p-vp<=0 || p-vp>MAX_NAMELEN) return -1;

    mystrncpy(forstruct.var,vp,sizeof(forstruct.var));

    return 0;

}

/* If bufp=NULL then numeric. Else string-wise.

 * returns 0 if success,

 * -1 if syntax error, 1 if bad values */

int cutfor(char *p, char *bufp)

{

    char *eqp, *fromp, *top, *stepp, *inp;

    p=find_word_start(p);

    inp=find_word_start(find_word_end(p));

    if(wordchr(inp,"in")==inp) {

     char buf[MAX_LINELEN+1], *bp;

     int i;

     double d;

     *inp=0; inp+=strlen("in");

     forin: inp=find_word_start(inp); forstruct.type=for_in;

     if(for_getvar(p)) return -1;

     if(bufp!=NULL) bp=bufp; else bp=buf;

     mystrncpy(bp,inp,MAX_LINELEN); substit(bp);

     strip_trailing_spaces(bp);

     if(bp[0]==0) {

         forstruct.from=0; forstruct.to=-1; forstruct.step=1; return 0;

     }

     for(i=0, inp=bp; i<MAX_VALUE_LIST && inp!=NULL; inp=top) {

         top=strparchr(inp,','); if(top) *top++=0;

         if(bufp==NULL) {

          d=evalue(inp); if(finite(d)) forstruct.list[i++]=d;

          else return 1;

         }

         else {

          strip_trailing_spaces(inp);

          forstruct.pos[i++]=find_word_start(inp);

         }

     }

     forstruct.from=0; forstruct.to=i-1; forstruct.step=1; return 0;

    }

    top=wordchr(p,"to"); if(top==NULL) {

     inp=strchr(p,'='); if(inp==NULL) return -1;

     *inp++=0; goto forin;

    }

    *top=0; top+=strlen("to");

    stepp=wordchr(top,"step"); if(stepp!=NULL) {

     *stepp=0; stepp+=strlen("step"); forstruct.step=evalue(stepp);

    }

    else forstruct.step=1;

    forstruct.to=evalue(top); forstruct.type=for_from;

    eqp=strchr(p,'='); fromp=wordchr(p,"from"); inp=wordchr(p,"in");

    if(eqp!=NULL && (fromp==NULL || eqp<fromp)) {

     *eqp++=0; fromp=eqp;

    }

    else {

     if(fromp==NULL) return -1;

     *fromp=0; fromp+=strlen("from");

    }

    forstruct.from=evalue(fromp);

    if(for_getvar(p)) return -1;

    if(!finite(forstruct.from+forstruct.to+forstruct.step)) return 1;

    else return 0;

}