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  1. /*    Copyright (C) 1998-2003 XIAO, Gang of Universite de Nice - Sophia Antipolis
  2.  *
  3.  *  This program is free software; you can redistribute it and/or modify
  4.  *  it under the terms of the GNU General Public License as published by
  5.  *  the Free Software Foundation; either version 2 of the License, or
  6.  *  (at your option) any later version.
  7.  *
  8.  *  This program is distributed in the hope that it will be useful,
  9.  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  10.  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11.  *  GNU General Public License for more details.
  12.  *
  13.  *  You should have received a copy of the GNU General Public License
  14.  *  along with this program; if not, write to the Free Software
  15.  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  16.  */
  17.  
  18. /* Interface Yacas to wims */
  19.  
  20. /*************** Customization: change values hereafter ****************/
  21.  
  22. /* This is yacas home page. To be kept up to date. */
  23. #define homepage "http://yacas.sourceforge.net/"
  24. /* String to tell the program to quit. */
  25. #define quitstring "\nquit\n"
  26. /* The way to print a string in the program. */
  27. #define stringprinter "\"%s\"\n"
  28. /* limit of input/output file sizes */
  29. int fsizelim=131072;
  30. int precision=20;  /* default */
  31.  
  32. char *inprompt="\nIn>";
  33. char *outprompt="Out>";
  34.  
  35. char *nameofcmd="yacas -p";
  36.  
  37. #include "yacasheader.c"
  38.  
  39. struct {
  40.     char *wname;    char *defaultval;    char *yacasset;
  41. } setups[]={
  42.       {"w_yacas_precision", "20", "\\precision=",},
  43.       {"w_yacas_serieslength", "8", "\\serieslength="}
  44. };
  45.  
  46. /* names which are not allowed */
  47. char *illegal[]={
  48.     "SystemCall", "Use", "Vi", "GetYacasPID", "ShowPS",
  49.       "MakeFunctionPlugin"
  50. };
  51.  
  52.  /* name parts which are not allowed */
  53.  /* 11/3/2013 add "@" and "ConcatStrings" */
  54. char *illpart[]={
  55.     "File", "Load", "Plot","ConcatStrings" ,"@"
  56. };
  57.  
  58. /***************** Nothing should need change hereafter *****************/
  59.  
  60. #define progname "yacas"
  61. #include "common.h"
  62. #include "common.c"
  63.  
  64.  /* check for security violations in command string */
  65. void check_parm(char *pm)
  66. {
  67.     char *p, *pp, *p2, buf[16];
  68.     int i;
  69.  
  70.     for(p=pm;*p!=0;p++) {
  71.       if(*p!='\\') continue;
  72.       if(*(p+1)=='\n') *p=*(p+1)=' ';
  73.       if(*(p+1)==0) *p=' ';
  74.     }
  75.     for(p=pm; *p!=0; p++) {
  76.       if(!isalpha(*p)) continue;
  77.       for(p2=p+1; isalpha(*p2); p2++);
  78.       if(p2-p>10) {p=p2-1; continue;}
  79.       memmove(buf,p,p2-p); buf[p2-p]=0; pp=p; p=p2-1;
  80.       for(p2=buf; islower(*p2); p2++);
  81.       if(*p2) continue;
  82.       i=search_list(firstupper,firstupperno,sizeof(firstupper[0]),buf);
  83.       if(i>=0) *pp=toupper(*pp);
  84.     }
  85.     find_illegal(pm);
  86. }
  87.  
  88.  
  89. /* process and print yacas output */
  90. void output(char *p)
  91. {
  92.     int i,n;
  93.     char *pp, *pe, *p1, *pt;
  94.     char outbuf[MAX_LINELEN+1];
  95.  
  96.     pp=strstr(p,inprompt); if(pp==NULL) return;
  97.     while(pp!=NULL && *pp!=0) {
  98.       pp+=strlen(inprompt); p1=find_word_start(pp);
  99.       pe=strstr(pp,outprompt);
  100.       pt=strstr(pp,inprompt);
  101.       if(pe==NULL || (pt!=NULL && pt<pe)) { /* error */
  102.           if(pt==NULL) pp=pp+strlen(pp); else pp=pt;
  103.           n=pp-p1; if(n>MAX_LINELEN) n=MAX_LINELEN; if(n<0) n=0;
  104.           memmove(outbuf,p1,n); outbuf[n]=0;
  105.           fprintf(stderr,"%s\n",outbuf);
  106.           puts(""); continue;
  107.       }
  108.       else {
  109.           *pe=0; pe=find_word_start(pe+strlen(outprompt));
  110.       }
  111.       pp=strstr(pe,inprompt);
  112.       if(pp==NULL) pp=pe+strlen(pe);
  113.       if(*p1==0) {
  114.           if(pp>=pe+sizeof(outbuf)) break;
  115.           n=pp-pe; if(n>MAX_LINELEN) n=MAX_LINELEN; if(n<0) n=0;
  116.           memmove(outbuf,pe,n); outbuf[n]=0;
  117.       }
  118.       else {
  119.           snprintf(outbuf,sizeof(outbuf),"%s",p1);
  120.           n=strlen(outbuf);
  121.       }
  122. /* make every output one-line */
  123.       for(i=0;i<n;i++) {
  124.           if(outbuf[i]=='\n') outbuf[i]=' ';
  125.       }
  126. /* strip leading and trailing spaces */
  127.       for(i=n-1;i>=0 && isspace(outbuf[i]); i--) outbuf[i]=0;
  128.       if(outbuf[i]==';') outbuf[i]=0;
  129.       for(pe=outbuf; *pe; pe++) if(isupper(*pe)) *pe=tolower(*pe);
  130.       for(pe=outbuf; isspace(*pe); pe++);
  131.       /* strip_zeros(pe); */
  132.       puts(pe);
  133.     }
  134. }
  135.  
  136. void about(void)
  137. {
  138.     cmdparm="-v"; prepabout("",outputfname,NULL);
  139.     if(readabout()>0)
  140.       printf("<a href=\"%s\">Yacas %s</a>",homepage,aboutbuf);
  141. }
  142.  
  143. char *dynsetup(char *ptr, char *end)
  144. {
  145.     int i; char *p, *pp;
  146.  
  147.     for(i=0;i<SETUP_NO;i++) {
  148.       p=getenv(setups[i].wname);
  149.       if(p!=NULL) for(pp=p;*pp;pp++) if(!isspace(*pp) && !isalnum(*pp)) p="";
  150.       if(p==NULL || *p==0) p=setups[i].defaultval;
  151.       if(strstr(setups[i].wname,"yacas_precision")!=NULL)
  152.         precision=atoi(p);
  153.       if(precision<0) precision=-precision;
  154.     }
  155.     return ptr;
  156. }
  157.  
  158. int main(int argc,char *argv[])
  159. {
  160.     prepare1();
  161.     run();
  162.     return 0;
  163. }
  164.  
  165.