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.

 */

        /* Interface Yacas to wims */

/*************** Customization: change values hereafter ****************/

        /* This is yacas home page. To be kept up to date. */

#define homepage "http://yacas.sourceforge.net/"

        /* String to tell the program to quit. */

#define quitstring "\nquit\n"

        /* The way to print a string in the program. */

#define stringprinter "\"%s\"\n"

        /* limit of input/output file sizes */

int fsizelim=131072;

int precision=20;       /* default */

char *inprompt="\nIn>";

char *outprompt="Out>";

char *nameofcmd="yacas -p";

#include "yacasheader.c"

struct {

    char *wname;    char *defaultval;    char *yacasset;

} setups[]={

      {"w_yacas_precision",     "20",   "\\precision=",},

      {"w_yacas_serieslength",  "8",    "\\serieslength="}

};

        /* names which are not allowed */

char *illegal[]={

    "SystemCall", "Use", "Vi", "GetYacasPID", "ShowPS",

      "MakeFunctionPlugin"

};

        /* name parts which are not allowed */

char *illpart[]={

    "File", "Load", "Plot"

};

/***************** Nothing should need change hereafter *****************/

#define progname "yacas"

#include "common.h"

#include "common.c"

        /* check for security violations in command string */

void check_parm(char *pm)

{

    char *p, *pp, *p2, buf[16];

    int i;

    for(p=pm;*p!=0;p++) {

        if(*p!='\\') continue;

        if(*(p+1)=='\n') *p=*(p+1)=' ';

        if(*(p+1)==0) *p=' ';

    }

    for(p=pm; *p!=0; p++) {

        if(!isalpha(*p)) continue;

        for(p2=p+1; isalpha(*p2); p2++);

        if(p2-p>10) {p=p2-1; continue;}

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

        for(p2=buf; islower(*p2); p2++);

        if(*p2) continue;

        i=search_list(firstupper,firstupperno,sizeof(firstupper[0]),buf);

        if(i>=0) *pp=toupper(*pp);

    }

    find_illegal(pm);

}

        /* process and print yacas output */

void output(char *p)

{

    int i,n;

    char *pp, *pe, *p1, *pt;

    char outbuf[MAX_LINELEN+1];

    pp=strstr(p,inprompt); if(pp==NULL) return;

    while(pp!=NULL && *pp!=0) {

        pp+=strlen(inprompt); p1=find_word_start(pp);

        pe=strstr(pp,outprompt);

        pt=strstr(pp,inprompt);

        if(pe==NULL || (pt!=NULL && pt<pe)) { /* error */

            if(pt==NULL) pp=pp+strlen(pp); else pp=pt;

            n=pp-p1; if(n>MAX_LINELEN) n=MAX_LINELEN; if(n<0) n=0;

            memmove(outbuf,p1,n); outbuf[n]=0;

            fprintf(stderr,"%s\n",outbuf);

            puts(""); continue;

        }

        else {

            *pe=0; pe=find_word_start(pe+strlen(outprompt));

        }

        pp=strstr(pe,inprompt);

        if(pp==NULL) pp=pe+strlen(pe);

        if(*p1==0) {

            if(pp>=pe+sizeof(outbuf)) break;

            n=pp-pe; if(n>MAX_LINELEN) n=MAX_LINELEN; if(n<0) n=0;

            memmove(outbuf,pe,n); outbuf[n]=0;

        }

        else {

            snprintf(outbuf,sizeof(outbuf),"%s",p1);

            n=strlen(outbuf);

        }

                /* make every output one-line */

        for(i=0;i<n;i++) {

            if(outbuf[i]=='\n') outbuf[i]=' ';

        }

          /* strip leading and trailing spaces */

        for(i=n-1;i>=0 && isspace(outbuf[i]); i--) outbuf[i]=0;

        if(outbuf[i]==';') outbuf[i]=0;

        for(pe=outbuf; *pe; pe++) if(isupper(*pe)) *pe=tolower(*pe);

        for(pe=outbuf; isspace(*pe); pe++);

        /* strip_zeros(pe); */

        puts(pe);

    }

}

void about(void)

{

    cmdparm="-v"; prepabout("",outputfname,NULL);

    if(readabout()>0)

      printf("<a href=\"%s\">Yacas %s</a>",homepage,aboutbuf);

}

char *dynsetup(char *ptr, char *end)

{

    int i; char *p, *pp;

    for(i=0;i<SETUP_NO;i++) {

        p=getenv(setups[i].wname);

        if(p!=NULL) for(pp=p;*pp;pp++) if(!isspace(*pp) && !isalnum(*pp)) p="";

        if(p==NULL || *p==0) p=setups[i].defaultval;

        if(strstr(setups[i].wname,"yacas_precision")!=NULL)

          precision=atoi(p);

        if(precision<0) precision=-precision;

    }

    return ptr;

}

int main(int argc,char *argv[])

{

    prepare1();

    run();

    return 0;    

}