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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. /* this is part of wims server source.
  19.  * This file does execution commands.
  20.  */
  21. #include "wims.h"
  22.  
  23. static void _skip_contents(int isif);
  24.  
  25. /* common routine for the two if's. */
  26. static void _exec_if_while(char *p, int numerical, int isif)
  27. {
  28.   if(compare(p,numerical,0)==0) _skip_contents(isif); /* skip if false */
  29.   else if(!isif) m_file.for_idx++;
  30.   return;
  31. }
  32.  
  33.     /* 'if' non-numerical (unless comparisons are < or >, etc.) */
  34. void exec_if(char *p)
  35. {
  36.    _exec_if_while(p,0,1);
  37. }
  38.  
  39. /* 'if' numerical. */
  40. void exec_ifval(char *p)
  41. {
  42.   _exec_if_while(p,1,1);
  43. }
  44.  
  45. void _exec_while(char *p, int numerical)
  46. {
  47.   FOR_STACK *stk;
  48.   if(m_file.for_idx>=MAX_FOR_LEVEL) module_error("too_many_fors");
  49.   stk=&(m_file.for_stack[m_file.for_idx]);
  50.   stk->lineno=m_file.l;
  51.   memmove(stk->varname,"?",2);
  52.   _exec_if_while(p,numerical,0);
  53. }
  54.  
  55. /* 'while' non-numerical (unless comparisons are < or >, etc.) */
  56. void exec_while(char *p)
  57. {
  58.   _exec_while(p,0);
  59. }
  60.  
  61. /* 'while' numerical. */
  62. void exec_whileval(char *p)
  63. {
  64.   _exec_while(p,1);
  65. }
  66.  
  67. void exec_endwhile(char *p)
  68. {
  69.   FOR_STACK *stk;
  70.   if(m_file.for_idx<=0) module_error("next_without_for");
  71.   stk=&(m_file.for_stack[m_file.for_idx-1]);
  72.   if(stk->varname[0]!='?') module_error("next_without_for");
  73.   m_file.for_idx--; *p=0;
  74.   m_file.linepointer=stk->lineno;
  75.   executed_gotos++;
  76.   if(executed_gotos>=GOTO_LIMIT) module_error("too_many_gotos");
  77. }
  78.  
  79. /* Should provide a method to stop infinite loop. */
  80. void exec_goto(char *p)
  81. {
  82.   char lbuf[MAX_NAMELEN+17];
  83.   char *label_start, *line_start;
  84.   int old_line;
  85.   int i;
  86.   executed_gotos++;
  87.   if(executed_gotos>=GOTO_LIMIT) module_error("too_many_gotos");
  88.   old_line=m_file.l;
  89.   label_start=find_word_start(p);
  90.   *find_word_end(label_start)=0;
  91.   m_file.l=m_file.linepointer=0;
  92.   for(i=0;i<m_file.linecnt;i++) {
  93.     if(((m_file.lines[i].isstart)&4)==0) continue;
  94.     line_start=find_word_start((m_file.lines[i]).address);
  95.     if(line_start>(m_file.lines[i+1]).address && i<m_file.linecnt)
  96.       continue;
  97.     m_file.linepointer=i;
  98.     wgetline(lbuf,MAX_NAMELEN+8,&m_file);
  99.     line_start=find_word_start(lbuf);
  100.     if(*line_start!=label_prefix_char) continue;
  101.     line_start++;*find_word_end(line_start)=0;
  102.     if(line_start[0]!='*' && strcmp(line_start,label_start)!=0) continue;
  103.     *p=0; i++; return;
  104.   }
  105.   m_file.l=old_line;
  106.   setvar(error_data_string,label_start); module_error("label_not_found");
  107. /*    m_file.linepointer=m_file.linecnt; *p=0; return;
  108. */
  109. }
  110.  
  111. /* 'else' with or without 'if'.
  112.  * Philosophy: we implement a loosely checked grammar.
  113.  * We cannot check 'if' grammar if we want to use 'goto'
  114.  * together with 'if'.
  115.  */
  116. void exec_else(char *p)
  117. {
  118.   _skip_contents(1); return;
  119. }
  120.  
  121. /* 'endif': nothing needs to be done here. */
  122. void exec_endif(char *p)
  123. {
  124.   return;
  125. }
  126.  
  127. /* find out the end of a for loop */
  128. void goto_for_end(void)
  129. {
  130.   int inner;
  131.   char buf[16];
  132.   inner=0;
  133.   while(m_file.linepointer<m_file.linecnt) {
  134.     if((m_file.lines[m_file.linepointer].isstart&2)==0) {
  135.       m_file.linepointer++; continue;
  136.     }
  137.     if(wgetline(buf,8,&m_file)==EOF) break;
  138.     *find_word_end(buf)=0;
  139.     if(strcmp(buf,"!for")==0) {
  140.       inner++; continue;
  141.     }
  142.     if(strcmp(buf,"!next")==0) {
  143.       if(inner>0) {
  144.         inner--; continue;
  145.       }
  146.       else break;
  147.     }
  148.   }
  149. }
  150.  
  151. /* for */
  152. void exec_for(char *p)
  153. {
  154.   char *p1, *p2, *p3;
  155.   double v1, v2, step;
  156.   char buf[MAX_LINELEN+1];
  157.   FOR_STACK *stk;
  158.  
  159.   if(m_file.for_idx>=MAX_FOR_LEVEL) module_error("too_many_fors");
  160.   stk=&(m_file.for_stack[m_file.for_idx]);
  161.   stk->lineno=m_file.l;
  162.   p1=find_word_start(p);
  163.   for(p2=p1; !isspace(*p2) && *p2!=0 && *p2!='=' ; p2++);
  164.   if(*p2==0) syntax: module_error("for_syntax");
  165.   if(p2-p1>MAX_NAMELEN) module_error("name_too_long");
  166.   memmove(stk->varname,p1,p2-p1);
  167.   stk->varname[p2-p1]=0;
  168.   p1=find_word_start(p2); if(*p1==0) goto syntax;
  169.   if(*p1=='=') {
  170.     p1++;
  171.     assign:
  172.     stk->from=0;
  173.     p2=wordchr(p1,"to");
  174.     if(p2==NULL) p2=strstr(p1,"..");
  175.     if(p2==NULL) goto syntax;
  176.     *p2=0; p2+=2;
  177.     p3=wordchr(p2,"step");
  178.     if(p3!=NULL) {
  179.       *p3=0; p3+=strlen("step");
  180.       step=evalue(p3);
  181.       if(step==0) module_error("zero_step");
  182.     }
  183.     else step=1;
  184.       v1=evalue(p1); v2=evalue(p2);
  185.       float2str(v1,buf); setvar(stk->varname, buf);
  186.       if((step>0 && v1>v2) || (step<0 && v1<v2) ) {  /* condition not met */
  187.   loop_out:
  188.         goto_for_end();
  189.       }
  190.     else {
  191.       stk->varval=v1; stk->varend=v2; stk->step=step;
  192.       stk->lineno=m_file.linepointer;
  193.       m_file.for_idx++;
  194.     }
  195.     *p=0; return;
  196.   }
  197.   if(memcmp(p1,"from",strlen("from"))==0 && isspace(*(p1+strlen("from")))) {
  198.     p1+=strlen("from"); goto assign;
  199.   }
  200.   if(memcmp(p1,"in",strlen("in"))==0 && isspace(*(p1+strlen("in")))) {
  201.     stk->from=1; p1+=strlen("in");
  202.     p1=find_word_start(p1); if(*p1==0) goto loop_out;
  203.     p2=xmalloc(MAX_LINELEN+1);
  204.     mystrncpy(p2,p1,MAX_LINELEN);
  205.     substit(p2);
  206.     strip_trailing_spaces(p2);
  207.     if(*p2==0) goto loop_out;
  208.     p1=strparchr(p2,','); stk->bufpt=p2;
  209.     if(p1!=NULL) {
  210.       *p1=0; stk->list_pt=find_word_start(p1+1);
  211.     }
  212.     else stk->list_pt=NULL;
  213.     strip_trailing_spaces(p2); setvar(stk->varname,p2);
  214.     stk->lineno=m_file.linepointer;
  215.     m_file.for_idx++; *p=0; return;
  216.   }
  217.   goto syntax;
  218. }
  219.  
  220. /* break a for loop */
  221. void exec_break(char *p)
  222. {
  223.   FOR_STACK *stk;
  224.   if(m_file.for_idx>0) {
  225.     stk=&(m_file.for_stack[m_file.for_idx-1]);
  226.     if(stk->varname[0]=='?') _skip_contents(0);
  227.     else goto_for_end();
  228.     m_file.for_idx--;
  229.   }
  230.   *p=0; return;
  231. }
  232.  
  233. /* next */
  234. void exec_next(char *p)
  235. {
  236.   double v1, v2, step;
  237.   char *p1, *p2;
  238.   char buf[MAX_LINELEN+1];
  239.   FOR_STACK *stk;
  240.   if(m_file.for_idx<=0) module_error("next_without_for");
  241.   stk=&(m_file.for_stack[m_file.for_idx-1]);
  242.   if(stk->varname[0]=='?') module_error("next_without_for");
  243.   if(stk->from) { /* list style */
  244.     if(stk->list_pt==NULL) {
  245.       free(stk->bufpt);
  246.       m_file.for_idx--;
  247.       *p=0; return;
  248.     }
  249.     p1=strchr(stk->list_pt,',');
  250.     if(p1!=NULL) {
  251.       *p1=0; p2=find_word_start(p1+1);
  252.     }
  253.     else p2=NULL;
  254.     strip_trailing_spaces(stk->list_pt);
  255.     setvar(stk->varname,stk->list_pt);
  256.     stk->list_pt=p2; goto loop_back;
  257.   }
  258.   v1=stk->varval; v2=stk->varend; step=stk->step;
  259.   v1+=step; stk->varval=v1;
  260.   float2str(v1,buf);
  261.   setvar(stk->varname, buf);
  262.   if((step>0 && v1<=v2) || (step<0 && v1>=v2)) { /* loop */
  263.     loop_back:
  264.     m_file.linepointer=stk->lineno;
  265.     executed_gotos++;
  266.     if(executed_gotos>=GOTO_LIMIT) module_error("too_many_gotos");
  267.   }
  268.   else m_file.for_idx--;
  269.   *p=0; return;
  270. }
  271.  
  272. /* Execution of a file in the module directory,
  273.  * only for trusted modules.
  274.  */
  275. void exec_mexec(char *p)
  276. {
  277.   direct_exec=1;
  278.   calc_mexec(p);
  279.   direct_exec=0;
  280. }
  281.  
  282. /* call shell. */
  283. void _exec_ex(char *p, char *arg0, char *arg1, int n)
  284. {
  285.   char *abuf[8];
  286.   char errorfname[MAX_FNAME+1];
  287.  
  288.   if(robot_access) {
  289.     *p=0; return;
  290.   }
  291.   if(!noout || !trusted_module() || is_class_module) {
  292.     _calc_exec(p,arg0,arg1,n); if(outputing) output0(p);
  293.     return;
  294.   }
  295.   mkfname(errorfname,"%s/exec.err",tmp_dir);
  296.   abuf[0]=arg0; abuf[1]=arg1; abuf[n]=p; abuf[n+1]=NULL;
  297.   wrapexec=1; exportall();
  298.   execredirected(abuf[0],NULL,NULL,errorfname,abuf);
  299. }
  300.  
  301. /* call shell. */
  302. void exec_sh(char *p)
  303. {
  304.   _exec_ex(p,"sh","-c",2);
  305. }
  306.  
  307. /* call perl. */
  308. void exec_perl(char *p)
  309. {
  310.   _exec_ex(p,"perl","-e",2);
  311. }
  312.  
  313. /* file should not be cached */
  314. void exec_nocache(char *p)
  315. {    m_file.nocache|=1; *p=0; }
  316.  
  317. /*
  318.  * Read another file.
  319.  * Read a file in order to perform tests.
  320.  * Relevant global variables:
  321.  * - m_file, a WORKING_FILE structure (should be restored to its original
  322.  *   value at the end of the procedure)
  323.  * - untrust, an integer (should be restored to its original
  324.  *   value at the end of the procedure)
  325.  * - outputing, an integer; its value is juste read.
  326.  * - readnest, an integer, which is incremented during the function
  327.  *   and decremented when it finishes.
  328.  * Relevant global variables used in subprograms:
  329.  * - module_prefix, a const char * which will be preprended before
  330.  *   the filename, (see lines.c, label = openit).
  331.  * Relevant wims_environment parameters:
  332.  * - wims_read_parm  (should be restored to its original
  333.  *   value at the end of the procedure)
  334.  * - wims_trustfile: this parameter is only read.
  335.  * Important procedures called by this one:
  336.  * - phtml_put(char*, int)
  337.  * - var_proc(char*, int)
  338.  * - module_error(const char*)
  339.  * @param p pointer to the filename, possibly followed by parameters
  340.  */
  341.  
  342. void exec_read(char *p)
  343. {
  344.   WORKING_FILE save;
  345.   char parmsave[MAX_LINELEN+1];
  346.   char *pp,*ps;
  347.   int t,cache;
  348.  
  349.   strip_trailing_spaces(p);p=find_word_start(p);
  350.   if(*p==0) return;
  351.   pp=find_word_end(p); if(*pp) *pp++=0;
  352.   pp=find_word_start(pp);
  353.   ps=getvar("wims_read_parm"); if(ps==NULL) ps="";
  354.   mystrncpy(parmsave,ps,sizeof(parmsave));
  355.   setvar("wims_read_parm",pp);
  356.   memmove(&save,&m_file,sizeof(WORKING_FILE));
  357.   cache=1; if(p[0]=='.' && p[1]=='/') {p+=2; cache=0;}
  358.   t=untrust;
  359.   if(strncmp(p,"wimshome/",9)==0) {
  360.     if((untrust&255)!=0 &&
  361.         (m_file.name[0]=='/' || strncmp(m_file.name,"wimshome/",9)==0))
  362.       module_error("Illegal_file_access");
  363.     untrust|=0x200;
  364.   }
  365.   if((untrust&0x202)!=0) {
  366.     pp=getvar("wims_trustfile");
  367.     if(pp!=NULL && *pp!=0 && wordchr(pp,p)!=NULL)
  368.       untrust&=0xfdfd;
  369.   }
  370.   readnest++; if(readnest>MAX_READNEST) module_error("too_many_nested_read");
  371.   if(outputing) phtml_put(p,cache); else var_proc(p,cache);
  372.   readnest--; untrust=t;
  373.   memmove(&m_file,&save,sizeof(WORKING_FILE));
  374.   if (trace_file){
  375.     int i;
  376.     putc('\n',trace_file);
  377.     for(i=1; i<=2*trace_indent-2; i++) putc(' ',trace_file);
  378.     fprintf(trace_file,"%s:",m_file.filepath); fflush(trace_file);
  379.   }
  380.   setvar("wims_read_parm",parmsave);
  381. }
  382.  
  383. /* read a variable processing file */
  384. void exec_readproc(char *p)
  385. {
  386.   int o=outputing; outputing=0; exec_read(p); outputing=o;
  387. }
  388.  
  389. void exec_defread(char *p)
  390. {
  391.   int t,o;
  392.   secure_exec();
  393.   t=untrust; untrust|=0x400;
  394.   o=outputing; outputing=0;
  395.   exec_read(p); untrust=t; outputing=o;
  396. }
  397.  
  398. /* Change to another file (no return) */
  399. void exec_changeto(char *p)
  400. {
  401.   m_file.linepointer=m_file.linecnt;
  402.   exec_read(p);
  403. }
  404.  
  405. int header_executed=0, tail_executed=0;
  406.  
  407. /* internal routine: get other language versions */
  408. void other_langs(void)
  409. {
  410.   int i,j,k;
  411.   char *p, lbuf[4], pbuf[MAX_FNAME+1], *phtml;
  412.   char namebuf[MAX_FNAME+1], listbuf[4*MAX_LANGUAGES];
  413.   static int otherlangs_got=0;
  414.  
  415.   if(otherlangs_got) return;
  416.   mystrncpy(namebuf,module_prefix,sizeof(namebuf));
  417.   listbuf[0]=0;j=strlen(namebuf)-3; p=listbuf;
  418.   if(j>=2 && strcmp("light",namebuf+j-2)==0) {
  419.     setvar("wims_light_module","yes");
  420.     phtml=getvar("phtml");
  421.     if(phtml==NULL || *phtml==0) return;
  422.     mystrncpy(pbuf,phtml,sizeof(pbuf));
  423.     j=strlen(pbuf)-3;
  424.     if(pbuf[j]!='.') return;
  425.     j++; ovlstrcpy(lbuf,pbuf+j); pbuf[j]=0;
  426.     j=strlen(namebuf);
  427.     snprintf(namebuf+j,MAX_FNAME-j-10,"/pages/%s",pbuf);
  428.     j=strlen(namebuf);
  429.     for(i=k=0;i<available_lang_no;i++) {
  430.       if(strcmp(lbuf,available_lang[i])==0) continue;
  431.       mystrncpy(namebuf+j,available_lang[i],MAX_FNAME-j);
  432.       if(ftest(namebuf)<0) continue;
  433.       if(k>0) *p++=',';
  434.       mystrncpy(p,available_lang[i],sizeof(listbuf)-4-(p-listbuf));
  435.       p+=strlen(p);
  436.       k++;
  437.     }
  438.   goto end;
  439.   }
  440.   if(j>0 && namebuf[j]=='.') {
  441.     setvar("wims_light_module","");
  442.     j++; ovlstrcpy(lbuf,namebuf+j); namebuf[j]=0;
  443.     for(i=k=0;i<available_lang_no;i++) {
  444.       if(strcmp(lbuf,available_lang[i])==0) continue;
  445.       snprintf(namebuf+j,MAX_FNAME-j,"%s/main.phtml",
  446.            available_lang[i]);
  447.       if(ftest(namebuf)<0) continue;
  448.       if(k>0) *p++=',';
  449.       mystrncpy(p,available_lang[i],sizeof(listbuf)-4-(p-listbuf));
  450.       p+=strlen(p);
  451.       k++;
  452.     }
  453.   }
  454.   end: setvar("wims_otherlangs",listbuf); otherlangs_got=1;
  455. }
  456.  
  457. /* Standardised reference to wims home */
  458. void exec_homeref(char *p)
  459. {
  460.   char *ref, *user;
  461.  
  462.   if(ismhelp || tail_executed) return;
  463.   setvar("wims_homeref_parm",p); *p=0;
  464.   user=getvar("wims_user");
  465.   if(user==NULL) user="";
  466.   if(*user==0 || robot_access) ref=home_referer;
  467.   else {
  468.     if(strcmp(user,"supervisor")==0) ref=home_referer_supervisor;
  469.     else ref=home_referer_user;
  470.   }
  471.   if(user[0]==0 && !robot_access) other_langs();
  472.   phtml_put_base(ref,0); tail_executed=1;
  473. }
  474.  
  475. /* Standardised header menu */
  476. void exec_headmenu(char *p)
  477. {
  478.   char *ref, *user;
  479.  
  480.   if(header_executed) return;
  481.   setvar("wims_headmenu_parm",p); *p=0;
  482.   user=getvar("wims_user");
  483.   if(user==NULL) user="";
  484.   if(*user==0 || robot_access) ref=header_menu;
  485.   else {
  486.     if(strcmp(user,"supervisor")==0) ref=header_menu_supervisor;
  487.     else ref=header_menu_user;
  488.   }
  489.   if(user[0]==0 && !robot_access) other_langs();
  490.   phtml_put_base(ref,0); header_executed=1;
  491. }
  492.  
  493. /* uniformized title */
  494. void exec_title(char *p)
  495. {
  496.   char *s;
  497.   *p=0;
  498.   if(!outputing) return;
  499.   s=getvar("wims_title_title");
  500.   if(s==NULL || *s==0) {
  501.     s=getvar("module_title");
  502.     if(s==NULL || *s==0) return;
  503.     force_setvar("wims_title_title",s);
  504.   }
  505.   phtml_put_base(title_page,0);
  506. }
  507.  
  508. /* standardized html tail */
  509. void exec_tail(char *p)
  510. {
  511.   if(!outputing || tail_executed) {
  512.     *p=0; return;
  513.   }
  514.   if(!ismhelp) exec_homeref(p);
  515.   *p=0;
  516.   _output_("</body></html>");
  517.   tail_executed=1;
  518. }
  519.  
  520. void exec_formend(char *p)
  521. {
  522.   _output_("\n</div></form>");
  523. }
  524.  
  525. void determine_font(char *l);
  526.  
  527. /* see changelog wims_mathml for history */
  528. void _headmathjax (char *p)
  529. {
  530.   _output_("\n<script>/*<![CDATA[*/\
  531. function wims_mathml_zoom(id){\
  532. var math = document.getElementById(id);\
  533. if(math.getAttribute(\"mathsize\") == \"100%\"){\
  534.  math.setAttribute(\"mathsize\",\"200%\");}else{\
  535.  math.setAttribute(\"mathsize\",\"100%\");};\
  536. };\
  537. window.addEventListener(\"load\", function() {\
  538.  var ua = navigator.userAgent.toLowerCase();\
  539.  var gecko = ua.indexOf(\"gecko\") > -1 && ua.indexOf(\"khtml\") === -1 && ua.indexOf(\"trident\") === -1;\
  540.  if(! gecko ){\
  541.    var script = document.createElement(\"script\");\
  542.    script.src  = \"scripts/js/mathjax/MathJax.js?config=TeX-MML-AM_HTMLorMML\";\
  543.    document.head.appendChild(script);\
  544.  };\
  545. });/*]]>*/</script>\n");
  546.  
  547.   // Safari/MathJax bugfix : refresh display when document ready.
  548.   _output_("\n<script>\
  549. reload_mathML=function(){var t=document.getElementsByClassName(\"wims_mathml\");Array.prototype.filter.call(t,function(t){var e=t.style.display;t.style.display=\"none\",t.style.opacity=\"0\",setTimeout(function(){t.style.display=e},1e3),setTimeout(function(){t.style.opacity=\"1\"},1100)})},document.onreadystatechange=function(){\"complete\"===document.readyState&&(/^((?!chrome|android).)*safari/i.test(navigator.userAgent)&&reload_mathML())};\
  550. </script>");
  551. }
  552.  
  553. /* standardized header */
  554. void _header(char *p, int option)
  555. {
  556.   char *s1, *s2, hbuf[MAX_LINELEN+1], *ws="", *ws2="", *bo, *ol;
  557.   char wsbuf[MAX_LINELEN+1],wsbuf2[MAX_LINELEN+1];
  558.   setvar("wims_header_parm",p); *p=0;
  559.   if(!outputing || header_executed) return;
  560.   s1=getvar("wims_window");
  561.   if(mode==mode_popup) {
  562.     if(s1!=NULL && *s1!=0) {
  563.       char *p1, *p2;
  564.       int t1,t2/*,t3,t4*/;
  565.       p1=find_word_start(s1);
  566.       for(p2=p1; myisdigit(*p2); p2++);
  567.       *p2=0; t1=atoi(p1); p1=p2+1;
  568.       while(!myisdigit(*p1) && *p1) p1++;
  569.       for(p2=p1; myisdigit(*p2); p2++);
  570.       *p2=0; t2=atoi(p1); p1=p2+1;
  571. /*        while(!myisdigit(*p1) && *p1) p1++;
  572.         for(p2=p1; myisdigit(*p2); p2++);
  573.         *p2=0; t3=atoi(p1); p1=p2+1;
  574.         while(!myisdigit(*p1) && *p1) p1++;
  575.         for(p2=p1; myisdigit(*p2); p2++);
  576.         *p2=0; t4=atoi(p1); p1=p2+1;
  577.         while(!myisdigit(*p1) && *p1) p1++;
  578.         for(p2=p1; myisdigit(*p2); p2++);
  579.         if(t3<5) t3=5; if(t4<20) t4=20;
  580. */     snprintf(wsbuf,sizeof(wsbuf),
  581.           "window.focus();window.resizeTo(%d,%d);",t1,t2); ws=wsbuf;
  582. /*      snprintf(wsbuf,sizeof(wsbuf),
  583.              "window.focus();window.resizeto(%d,%d);window.moveto(%d,%d);",
  584.              t1,t2,t3,t4); ws=wsbuf;
  585. */   }
  586.   }
  587.   else {
  588.     if(s1!=NULL && strcmp(s1,"new")==0)
  589.       ws="window.focus();window.resizeTo(800,640);window.moveTo(15,35);";
  590.   }
  591.   if(strstr(session_prefix,"_exam")!=NULL) {
  592. /*    char buf[64]; */
  593.     if(*ws==0) ws="window.focus();";
  594.     else ws= "window.focus();window.moveTo(5,70);";
  595. /*    snprintf(buf,sizeof(buf),"name.phtml.%s",lang);
  596.       phtml_put_base(buf);
  597.       phtml_put_base("jsclock.phtml"); */
  598.   }
  599.   s1=getvar("wims_html_header"); if(s1==NULL) s1="";
  600.   determine_font(getvar("module_language"));
  601.   s2=getvar("module_title"); if(s2!=NULL && *s2!=0) {
  602.     mystrncpy(hbuf,s2,sizeof(hbuf)); calc_detag(hbuf);
  603.     setvar("module_title2",hbuf);
  604.   }
  605.   mystrncpy(hbuf,s1,sizeof(hbuf)); substit(hbuf);
  606.   s2=getvar("wims_htmlbody"); if(s2==NULL) s2="";
  607.   bo=getvar("wims_html_bodyoption"); if(bo==NULL) bo="";
  608.   ws2=getvar("wims_html_onload"); if(ws2==NULL) ws2="";
  609.   snprintf(wsbuf2,sizeof(wsbuf2),"%s%s",ws,ws2);
  610.   setvar("wims_html_onload",wsbuf2);
  611.   if(wsbuf2[0]) ol=" onload="; else ol="";
  612.  
  613.   output("<!DOCTYPE html>\
  614.    \n<html lang=\"%s\"><head>\n\
  615.    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0, minimum-scale=1.0\"/>\n\
  616.    %s\n", lang, hbuf);
  617.   if(robot_access){
  618.     output("<link rel=\"stylesheet\" href=\"html/themes/_css/robots.css\" />");
  619.   }
  620.  
  621.   _headmathjax(p);
  622.  
  623.   if(ol[0]) {
  624.     output("</head>\n<body %s %s\"%s\" %s>", s2, ol, wsbuf2, bo);}
  625.   else {
  626.     output("</head>\n<body %s %s%s %s>", s2, ol, wsbuf2, bo);
  627.   }
  628.   exec_headmenu(p);
  629.   if(option) exec_title(p);
  630.   if(cmd_type==cmd_help) {
  631.     char *s=getvar("special_parm");
  632.     if(s==NULL) s="";
  633.     m_file.linepointer=m_file.linecnt;
  634.     if(strcmp(s,"about")==0) ovlstrcpy(hbuf,"about.phtml");
  635.     else ovlstrcpy(hbuf,"help.phtml");
  636.     exec_read(hbuf); exec_tail(p); /* param of exec_...() must be readable */
  637.     return;
  638.   }
  639.   header_executed=1;
  640. }
  641.  
  642. void exec_header(char *p) { _header(p,1);}
  643. void exec_header1(char *p) { _header(p,0);}
  644.  
  645. char href_target[128];
  646. char jsbuf[512];
  647. #define jsstr " onclick=\"%s=window.open('','%s','status=no,toolbar=no,location=no,menubar=no,scrollbars=yes,resizable=yes')\""
  648. int ref_mhelp=0;
  649. int follow_list[]={
  650.   ro_session, ro_lang, ro_useropts, ro_module
  651. };
  652. #define follow_no (sizeof(follow_list)/sizeof(follow_list[0]))
  653.  
  654. void _httpfollow(char b1[], char *wn, int new)
  655. {
  656.   int i;
  657.   char *p1, *s, *ss, sb[MAX_LINELEN+1], qbuf[MAX_LINELEN+1];
  658.  
  659.   sb[0]=0;
  660.   for(i=0;i<follow_no;i++) {
  661.     if(robot_access && follow_list[i]==ro_session) continue;
  662.     if(!new && follow_list[i]!=ro_session
  663.         && follow_list[i]!=ro_module && follow_list[i]!=ro_lang)
  664.       continue;
  665.     if(follow_list[i]==ro_module) {
  666.       char *pp;
  667.       if(new) continue;
  668.       pp=strstr(b1,"cmd=");
  669.       if(pp==NULL) continue;
  670.       pp+=strlen("cmd=");
  671.       if(memcmp(pp,"intro",strlen("intro"))==0 ||
  672.          memcmp(pp,"new",strlen("new"))==0) continue;
  673.     }
  674.     s=getvar(ro_name[follow_list[i]]);
  675.     ss=strstr(b1,ro_name[follow_list[i]]);
  676.     if(s!=NULL && *s!=0 &&
  677.       (ss==NULL || (ss>b1 && *(ss-1)!='&')
  678.        || *(ss+strlen(ro_name[follow_list[i]]))!='=')) {
  679.       if(follow_list[i]==ro_session && memcmp(href_target,"wims_",5)==0) {
  680.         char st[MAX_LINELEN+1];
  681.         char *s1;
  682.         s1=getvar("wims_session");
  683.         if(s1==NULL) internal_error("exec_href() error.\n");
  684.         if(ref_mhelp) {
  685.           if(strstr(s1,"_mhelp")!=0)
  686.             snprintf(st,sizeof(st),"%s",s1);
  687.           else
  688.             snprintf(st,sizeof(st),"%s_mhelp",s1);
  689.         }
  690.         else snprintf(st,sizeof(st),"%.10s%s",s1,href_target+4);
  691.           s=st;
  692.       }
  693.       snprintf(sb+strlen(sb),MAX_LINELEN-strlen(sb),"%s=%s&",
  694.              ro_name[follow_list[i]],s);
  695.       if(ismhelp && follow_list[i]==ro_session &&
  696.            strstr(sb,"_mhelp")==NULL)
  697.         snprintf(sb+strlen(sb)-1,MAX_LINELEN-strlen(sb)+1,"_mhelp&");
  698.       }
  699.   }
  700.   snprintf(qbuf,MAX_LINELEN,"%s%s%s",wn,sb,b1);
  701.   /* cleaning up query string */
  702.   for(p1=qbuf;*p1;p1++) {
  703.     if(*p1=='"') string_modify(qbuf,p1,p1+1,"%22");
  704.     if(*p1=='&' && isalpha(*(p1+1))) {
  705.       p1++; string_modify(qbuf,p1,p1,"+");
  706.     }
  707.   }
  708.   mystrncpy(b1,qbuf,MAX_LINELEN);
  709. }
  710.  
  711. /* Restart with a new module, using http code 302. */
  712. void exec_restart(char *p)
  713. {
  714.   /* buf will contain all the url parameters*/
  715.   /* buf2 will be the final URL */
  716.   char buf[MAX_LINELEN+1], *rfn, buf2[MAX_LINELEN+1];
  717.   /* long int t; */
  718.  
  719.   if(robot_access || outputing || !trusted_module() || is_class_module) return;
  720.   /* accessfile(buf,"r","%s/restart.time",s2_prefix);
  721.     t=atoi(buf); if(t==nowtime) return;    */ /* possible looping */
  722.   mystrncpy(buf,find_word_start(p),sizeof(buf));
  723.   *find_word_end(buf)=0;
  724.   _httpfollow(buf,"",0);
  725.   nph_header(302);
  726.   rfn=strchr(ref_name,':');
  727.   if(rfn==NULL) {
  728.     usual: snprintf(buf2,sizeof(buf2),"%s?%s",ref_name,buf);
  729.   }
  730.   else {
  731.     char *p;
  732.     p=getvar("wims_protocol");
  733.     if(p!=NULL && strcmp(p,"https")==0) {
  734.       snprintf(buf2,sizeof(buf2),"https%s?%s",rfn,buf);
  735.     }
  736.     else goto usual;
  737.   }
  738.   printf("Location: %s\r\n\r\n\
  739. <!DOCTYPE html>\
  740. <html><body><a href=\"%s\">%s</a></body></html>",buf2,buf2,buf2);
  741.   close_working_file(&m_file,0); write_logs();
  742.   snprintf(buf,sizeof(buf),"%ld",(long)nowtime);
  743. /*    accessfile(buf,"w","%s/restart.time",s2_prefix);*/
  744.   delete_pid(); exit(0);
  745. }
  746.  
  747. /*  extract target tag from parm string. */
  748. void href_find_target(char *p)
  749. {
  750.   char *pp, *pe,buf1[MAX_LINELEN+1];
  751.   href_target[0]=0; jsbuf[0]=0; ref_mhelp=0;
  752.   for(pp=find_word_start(p);*pp!=0;pp=find_word_start(pe)) {
  753.     pe=find_word_end(pp);
  754.     if(strncasecmp(pp,"target=wims_",strlen("target=wims_"))!=0) continue;
  755.     memmove(buf1,pp,pe-pp); buf1[pe-pp]=0; substit(buf1);
  756.     if(strncasecmp(buf1,"target=wims_mhelp",strlen("target=wims_mhelp"))==0) {
  757.       if(*pe!=0) *pe++=0;
  758.       ovlstrcpy(href_target,"wims_help");
  759.       ref_mhelp=1;
  760.     }
  761.     else {
  762.       if(*pe!=0) *pe++=0;
  763.         mystrncpy(href_target,buf1+strlen("target="),sizeof(href_target));
  764.     }
  765.     snprintf(jsbuf,sizeof(jsbuf),jsstr,href_target,href_target);
  766.     ovlstrcpy(pp,pe);return;
  767.   }
  768.   pp=getvar("module_help");
  769.   if(href_target[0]==0 && pp!=NULL && strcmp(pp,"popup")==0 &&
  770.      (pe=strstr(p,"cmd=help"))!=NULL) {
  771.     if(pe==p || *(pe-1)=='&') {
  772.       ovlstrcpy(href_target,"wims_help"); ref_mhelp=1;
  773.       snprintf(jsbuf,sizeof(jsbuf),jsstr,href_target,href_target);
  774.     }
  775.   }
  776. }
  777.  
  778. void _href_getdef(char src[], char vname[], char buf[], int buflen)
  779. {
  780.   char *p1, *p2, *p3;
  781.   buf[0]=0;
  782.   for(p1=strstr(src,vname); p1; p1=strstr(p2,vname)) {
  783.     p2=p1+strlen(vname); if(*p2!='=') continue;
  784.     if(p1>src && *(p1-1)!='&') continue;
  785.     p2++; p3=strchr(p2,'&'); if(p3==NULL) p3=p2+strlen(p2);
  786.     if(p3-p2>=buflen) return; /* too long */
  787.     memmove(buf,p2, p3-p2); buf[p3-p2]=0; return;
  788.   }
  789. }
  790.  
  791. /* Create href to wims requests. subst() is not done. */
  792. void exec_href(char *p)
  793. {
  794.   char *s, st[128], sti[128], stc[128], stt[128], *p1, *p2, *p3, *wn="";
  795.   char *U="<span class=\"disabled_link\">%s</span>";
  796.   char b1[MAX_LINELEN+1], b2[MAX_LINELEN+1];
  797.   int new=0;
  798.   if(!outputing) return;
  799.   href_find_target(p);
  800.   p1=find_word_start(p);
  801.   p2=find_word_end(p1); if(*p2) *(p2++)=0;
  802.   mystrncpy(b1,p1,sizeof(b1));
  803.   mystrncpy(b2,find_word_start(p2),sizeof(b2));
  804.   substit(b1); substit(b2);
  805.   /* standard reference */
  806.   if(*b2==0 && strchr(b1,'=')==NULL) {
  807.     char b[MAX_LINELEN+1], *ll;
  808.     p1=find_word_start(b1); *find_word_end(p1)=0;
  809.     if(*p1==0 || strlen(p1)>64) return;
  810.     ll=getvar("module_language");
  811.     if(ll==NULL || *ll==0 || *(ll+1)==0 || *(ll+2)!=0) ll=lang;
  812.     accessfile(b,"r","html/href.%s",ll);
  813.     memmove(p1+1,p1,64); *p1='\n'; strcat(p1,"  ");
  814.     p2=strstr(b,p1); if(p2==NULL) return;
  815.     p1=find_word_start(p2+strlen(p1)); p2=find_word_end(p1);
  816.     if(*p2) *(p2++)=0;
  817.     p3=strchr(p2,'\n'); if(p3!=NULL) *p3=0;
  818.     mystrncpy(b1,p1,sizeof(b1));
  819.     mystrncpy(b2,find_word_start(p2),sizeof(b2));
  820.     substit(b1); substit(b2);
  821.   }
  822.   /* for robots: only references without defining cmd. */
  823.   if(robot_access && strstr(b1,"cmd=")!=NULL &&
  824.       strstr(b1,"module=adm/doc")==NULL) {
  825.     _output_(b2); return;
  826.   }
  827.   if(robot_access && strstr(aliased_cgi,"yes")!=NULL) {
  828.     char mbuf[256], lbuf[16];
  829.     _href_getdef(b1,"module",mbuf,sizeof(mbuf));
  830.     if(mbuf[0]==0) mystrncpy(mbuf,home_module,sizeof(mbuf));
  831.     _href_getdef(b1,"lang",lbuf,sizeof(lbuf));
  832.     if(strlen(lbuf)!=2) {mystrncpy(lbuf,lang,4);lbuf[2]=0;}
  833.     if(strncmp(mbuf,"adm/doc",strlen("adm/doc"))==0) {
  834.       char dbuf[256], bbuf[256];
  835.       _href_getdef(b1,"doc",dbuf,sizeof(dbuf));
  836.       _href_getdef(b1,"block",bbuf,sizeof(bbuf));
  837.       if(!myisdigit(dbuf[0])) dbuf[0]=0;
  838.       if(dbuf[0]!=0 && bbuf[0]==0) snprintf(bbuf,sizeof(bbuf),"main");
  839.       if(dbuf[0]==0)
  840.         output("<a href=\"%s%s_doc~.html\">%s</a>", ref_base,lbuf,b2);
  841.       else
  842.         output("<a href=\"%s%s_doc~%s~%s.html\">%s</a>",
  843.            ref_base,lbuf,dbuf,bbuf,b2);
  844.     }
  845.     else {
  846.       for(s=strchr(mbuf,'/'); s!=NULL; s=strchr(s+1,'/')) *s='~';
  847.       output("<a href=\"%s%s_%s.html\">%s</a>", ref_base,lbuf,mbuf,b2);
  848.     }
  849.     return;
  850.   }
  851.   s=getvar("wims_ref_id");
  852.   if(s!=NULL && *s!=0 && !isspace(*s)) {
  853.     snprintf(sti,sizeof(sti)," id=\"%s\"",s);
  854.   }
  855.   else sti[0]=0;
  856.  
  857.   s=getvar("wims_ref_class");
  858.   if(s!=NULL && *s!=0 && !isspace(*s)) {
  859.     snprintf(stc,sizeof(stc)," class=\"%s\"",s);
  860.   }
  861.   else stc[0]=0;
  862.  
  863.   s=getvar("wims_ref_title");
  864.   if(s!=NULL && *s!=0 && !isspace(*s)) {
  865.     snprintf(stt,sizeof(stt)," title=\"%s\"",s);
  866.   }
  867.   else stt[0]=0;
  868.  
  869.   s=getvar("wims_ref_target");
  870.   if(href_target[0]!=0) s=href_target;
  871.   if(s!=NULL && *s!=0 && !isspace(*s)) {
  872.     snprintf(st,sizeof(st)," target=\"%s\"",s);
  873.     if(strcmp(s,"_parent")!=0) {
  874.       new=1; wn="wims_window=new&";
  875.     }
  876.   }
  877.   else st[0]=0;
  878.   _httpfollow(b1,wn,new);
  879.   tohttpquery(b1);
  880.   if(strstr(session_prefix,"_check")!=NULL) {
  881.     if(*b2) output(U,b2);
  882.   else _output_("<a id=\"0\"></a>");
  883.   return;
  884.   }
  885.   if(jsbuf[0]==0 && st[0]==0 && strstr(session_prefix,"_exam")!=NULL) {
  886.     p1=strstr(b1,"cmd=");
  887.     if(p1!=NULL) {
  888.       p1+=strlen("cmd=");
  889.       if(strncmp(p1,"new",3)==0 || strncmp(p1,"renew",5)==0 ||
  890.           strncmp(p1,"intro",5)==0) {
  891.         if(*b2) output(U,b2);
  892.         else _output_("<a id=\"#\"></a>");
  893.         return;
  894.       }
  895.     }
  896.   }
  897.   if(*b2)
  898.     output("<a href=\"%s?%s\"%s%s %s %s %s>%s</a>",
  899.        ref_name, b1, st, jsbuf,sti,stc,stt,b2);
  900.   else
  901.     output("<a href=\"%s?%s\"%s%s %s %s %s>",ref_name, b1, st, jsbuf,sti,stc,stt);
  902.   setvar("wims_ref_id","");
  903.   setvar("wims_ref_class","");
  904.   setvar("wims_ref_title","");
  905. }
  906.  
  907. /* Create form refering to the page. */
  908. void exec_form(char *p)
  909. {
  910.   char *s, *p1, *p2, *a, *m, *opt, st[128], *wn="", *form_id;
  911.   char abuf[128], idbuf[128];
  912.   int i, new=0;
  913.   if(!outputing) return;
  914.   href_find_target(p);
  915.   s=getvar("wims_ref_target");
  916.   if(href_target[0]!=0) s=href_target;
  917.   if(s!=NULL && *s!=0 && !isspace(*s)) {
  918.     snprintf(st,sizeof(st)," target=\"%s\"",s);
  919.     if(strcmp(s,"_parent")!=0) {
  920.       new=1; wn="<input type=\"hidden\" name=\"wims_window\" value=\"yes\" />\n";
  921.     }
  922.   }
  923.   else st[0]=0;
  924.   a=getvar("wims_ref_anchor"); if(a==NULL) a="";
  925.   opt=find_word_start(find_word_end(find_word_start(p)));
  926.   m=getvar("wims_form_method");
  927.   if(m!=NULL) {
  928.     m=find_word_start(m);
  929.     if(strncasecmp(m,"post",4)==0) m="post";
  930.     else if(strncasecmp(m,"get",3)==0) m="get";
  931.       else if(strncasecmp(m,"file",4)==0) {
  932.        m="post\" enctype=\"multipart/form-data";
  933.       snprintf(abuf,sizeof(abuf),"?form-data%ld%s",random(),a); a=abuf;
  934.       force_setvar("wims_form_method","");
  935.     }
  936.     else m=default_form_method;
  937.   }
  938.   else m=default_form_method;
  939.  
  940.   if(strstr(session_prefix,"_check")!=NULL) {
  941.     output("<form action=\"NON_EXISTING_PAGE\" onsubmit=\"window.close();\" %s>\n",
  942.            opt);
  943.     return;
  944.   }
  945.  
  946.   form_id=getvar("wims_form_id");
  947.   if(form_id==NULL || *form_id==0 || isspace(*form_id)){
  948.     form_id="";
  949.   } else {
  950.     snprintf(idbuf,sizeof(idbuf),"id=\"%s\"",find_word_start(form_id));form_id=idbuf;
  951.   }
  952.   force_setvar("wims_form_id","");
  953.  
  954.   output("<form action=\"%s%s\"%s method=\"%s\" %s %s>\n<div class='wims_form'>%s",ref_name,a,st,m,opt,form_id,wn);
  955.   if(a!=abuf && a[0]) force_setvar("wims_ref_anchor","");
  956.   for(i=0;i<follow_no;i++) {
  957.     if(robot_access && follow_list[i]==ro_session) continue;
  958.     if(!new && follow_list[i]!=ro_session
  959.      && follow_list[i]!=ro_module && follow_list[i]!=ro_lang)
  960.       continue;
  961.     if(follow_list[i]==ro_module) continue;
  962.     s=getvar(ro_name[follow_list[i]]);
  963.     if(s!=NULL && *s!=0) {
  964.       if(follow_list[i]==ro_session && memcmp(href_target,"wims_",5)==0) {
  965.         char st[MAX_LINELEN+1];
  966.         char *s1;
  967.         s1=getvar("wims_session");
  968.         if(s1==NULL) internal_error("exec_form() error.\n");
  969.         snprintf(st,sizeof(st),"%.10s%s",s1,href_target+4);
  970.         s=st;
  971.       }
  972.       output("<input type=\"hidden\" name=\"%s\" value=\"%s\" />\n",
  973.            ro_name[follow_list[i]],s);
  974.     }
  975.   }
  976.   p1=find_word_start(p);p2=find_word_end(p1);
  977.   if(p2>p1) {
  978.     char buf[64];
  979.     int i;
  980.     i=p2-p1; if(i>60) i=60;
  981.     memmove(buf,p1,i);buf[i]=0;
  982.     for(i=0;i<CMD_NO && strcmp(buf,commands[i]);i++);
  983.     if(i<CMD_NO) {
  984.       output("<input type=\"hidden\" name=\"cmd\" value=\"%s\" />\n",buf);
  985.       if(i!=cmd_intro && i!=cmd_new)
  986.         output("<input type=\"hidden\" name=\"module\" value=\"%s\" />\n",
  987.             getvar(ro_name[ro_module]));
  988.     }
  989.   }
  990. }
  991.  
  992. /* Creat link to trap robot access, an internal command
  993.  * which should not be documented
  994.  */
  995. void exec_robottrap(char *p)
  996. {
  997.   char buf[MAX_LINELEN+1];
  998.   if(robot_access) return;
  999.   ovlstrcpy(buf,"session=$wims_session.1&module=adm/trap");
  1000.   _output_("<!-- "); exec_href(buf);_output_("Robot trapper, do not click!</a> -->");
  1001.   _output_("<div class='wimstrap hide'>");exec_href(buf); _output_("<span>Robot trapper, do not click!</span></a></div>");
  1002. }
  1003.  
  1004. /* set definitions in a file. Trusted modules only. */
  1005. void exec_setdef(char *p)
  1006. {
  1007.    char *p1, *pp;
  1008.    char nbuf[MAX_LINELEN+1], fbuf[MAX_LINELEN+1], tbuf[MAX_LINELEN+1];
  1009.    if(robot_access || !trusted_module() || is_class_module) return;
  1010.    p1=wordchr(p,"in"); if(p1==NULL) module_error("syntax_error");
  1011.    *p1=0; p1=find_word_start(p1+strlen("in"));
  1012.    ovlstrcpy(nbuf,p);
  1013.    mystrncpy(tbuf,p1,sizeof(tbuf));
  1014.    substit(nbuf); substit(tbuf);
  1015.    if(find_module_file(tbuf,fbuf,1)) return;
  1016.    pp=find_word_start(nbuf); p1=find_word_start(fbuf); *find_word_end(p1)=0;
  1017.    strip_trailing_spaces(pp);
  1018.    setdef(p1,pp);
  1019. }
  1020.  
  1021. /* Set a variable. */
  1022. void exec_set(char *name)
  1023. {
  1024.   char *p, *defn, *parm;
  1025.   char tbuf2[MAX_LINELEN+1], namebuf[MAX_LINELEN+1];
  1026.   int i;
  1027.  
  1028.   p=strchr(name,'=');
  1029.   if(p==NULL) return; /* warning or error! */
  1030.   *p=0; defn=find_word_start(p+1);
  1031.   *find_word_end(name)=0;
  1032.   mystrncpy(namebuf,find_word_start(name),sizeof(namebuf));
  1033.   /* we allow substit in names, to implement array */
  1034.   substit(namebuf); *find_word_end(namebuf)=0;
  1035.   if(*defn!=calc_prefix_char) {
  1036.   /* substitute by default */
  1037.     mystrncpy(tbuf2,defn,sizeof(tbuf2));
  1038.     substit(tbuf2); setvar(namebuf,tbuf2); return;
  1039.   }
  1040.   /* called from !readdef */
  1041.   if((untrust&4)!=0) module_error("not_trusted");
  1042.   /* definition is a command  */
  1043.   parm=find_word_end(defn+1);
  1044.   if( *parm != 0 ) { *parm=0; parm=find_word_start(parm+1); }
  1045.   i=m_file.lines[m_file.l].varcode;
  1046.   if(i<0) {
  1047.     i=search_list(calc_routine,CALC_FN_NO,sizeof(calc_routine[0]),defn+1);
  1048.     m_file.lines[m_file.l].varcode=i;
  1049.   }
  1050.   if(i<0) {
  1051.       /* replace by warning? */
  1052.     setvar(error_data_string,defn+1); module_error("bad_cmd");
  1053.     return;
  1054.   }
  1055.   mystrncpy(tbuf2,parm,sizeof(tbuf2)); execnt++;
  1056.   if(calc_routine[i].tag==0) substit(tbuf2);
  1057.   tbuf2[sizeof(tbuf2)-1]=0; calc_routine[i].routine(tbuf2);
  1058.       /* remove trailing new line */
  1059.   tbuf2[sizeof(tbuf2)-1]=0;
  1060.   if(tbuf2[strlen(tbuf2)-1]=='\n') tbuf2[strlen(tbuf2)-1]=0;
  1061.     setvar(namebuf,tbuf2);
  1062. }
  1063.  
  1064. /* set but do not overwrite. */
  1065. void exec_default(char *p)
  1066. {
  1067.   char *start, *end, c, *pp;
  1068.   char namebuf[MAX_LINELEN+1];
  1069.   start=find_word_start(p);
  1070.   for(end=start;*end!=0 && !isspace(*end) && *end!='='; end++);
  1071.   c=*end; *end=0;
  1072.   if(end-start<=MAX_LINELEN-1) {
  1073.     memmove(namebuf,start,end-start+1); substit(namebuf);
  1074.     pp=getvar(namebuf);
  1075.     if(pp!=NULL && *pp!=0) return;
  1076.   }
  1077.   *end=c; exec_set(p);
  1078. }
  1079.  
  1080. /* Does nothing; just a comment. */
  1081. void exec_comment(char *p)
  1082. {
  1083.   return;
  1084. }
  1085.  
  1086. /* Exit the file under interpretation */
  1087. void exec_exit(char *p)
  1088. {
  1089.   m_file.linepointer=m_file.linecnt;
  1090.   return;
  1091. }
  1092.  
  1093. /* output a file. Aliases:
  1094.      * getfile, outfile, fileout */
  1095. void exec_getfile(char *p)
  1096. {
  1097.   char *s, sti[128], stc[128], stt[128], sgf[128], *p1, url[MAX_LINELEN+1];
  1098.   char *prompt;
  1099.  
  1100.   p=find_word_start(p); prompt=find_word_end(p);
  1101.   if(*prompt!=0) *prompt++=0;
  1102.   prompt=find_word_start(prompt);
  1103.   if(*p==0 || !outputing) return;
  1104.   if(!trusted_module() || is_class_module) return;
  1105.   s=getvar(ro_name[ro_session]);
  1106.   if(s==NULL || *s==0 || strstr(s,"robot")!=NULL) return;
  1107.   mystrncpy(url,ref_name,sizeof(url));
  1108.   for(p1=url+strlen(url);p1>url && *(p1-1)!='/'; p1--);
  1109.   if(good_httpd) snprintf(p1,sizeof(url)+p1-url,
  1110.               "getfile/%s?&+session=%s&+modif=%ld",
  1111.               p,s,(long)nowtime);
  1112.   else snprintf(url,sizeof(url),
  1113.       "%s?cmd=getfile&+session=%s&+special_parm=%s&+modif=%ld",
  1114.           ref_name,s,p,(long)nowtime);
  1115.   snprintf(jsbuf,sizeof(jsbuf),jsstr,"wims_file","wims_file");
  1116.  
  1117.   s=getvar("wims_ref_id");
  1118.   if(s!=NULL && *s!=0 && !isspace(*s)) {
  1119.     snprintf(sti,sizeof(sti)," id=\"%s\"",s);
  1120.   }
  1121.   else sti[0]=0;
  1122.  
  1123.   s=getvar("wims_ref_class");
  1124.   if(s!=NULL && *s!=0 && !isspace(*s)) {
  1125.     snprintf(stc,sizeof(stc)," class=\"%s\"",s);
  1126.   }
  1127.   else stc[0]=0;
  1128.  
  1129.   s=getvar("wims_ref_title");
  1130.   if(s!=NULL && *s!=0 && !isspace(*s)) {
  1131.     snprintf(stt,sizeof(stt)," title=\"%s\"",s);
  1132.   }
  1133.   else stt[0]=0;
  1134.  
  1135.   s=getvar("wims_getfile_fname");
  1136.   if(s!=NULL && *s!=0 && !isspace(*s)) {
  1137.     snprintf(sgf,sizeof(sgf)," download=\"%s\"",s);
  1138.   }
  1139.   else sgf[0]=0;
  1140.  
  1141.   if(*prompt) output("<a href=\"%s\" %s %s %s %s>%s</a>\n", url,sti,stc,stt,sgf,prompt);
  1142.   else output("<a href=\"%s\" %s %s %s></a>",url,sti,stc,stt);
  1143.  
  1144.   setvar("wims_ref_id","");
  1145.   setvar("wims_ref_class","");
  1146.   setvar("wims_ref_title","");
  1147.   setvar("wims_getfile_fname","");
  1148. }
  1149.  
  1150. /* internal */
  1151. void count_insert(void)
  1152. {
  1153.   insert_no++;
  1154.   if(insert_no>=INS_LIMIT) module_error("too_many_ins");
  1155. }
  1156.  
  1157. int animated_ins=0;
  1158. int grouped_ins=0;
  1159.  
  1160. /* generic insertion */
  1161. void _exec_ins(char *p, char *script_name,char *format)
  1162. {
  1163.   char *s, *b, *at, *tag, *tag2, *al, *fmt, *mh;
  1164.   char *p1, *pt;
  1165.   char buf[1024],buf2[1024],url[MAX_LINELEN+1],altbuf[1024];
  1166.   char outbuf[1024];
  1167.   int border, middle, vspace;
  1168.   long int tel;
  1169.  
  1170.   if(robot_access) return;
  1171.   count_insert(); outbuf[0]=0;
  1172.   setenv("ins_source",p,1); /* value kept from user tamper */
  1173.   if(animated_ins) fmt=getvar("anim_format"); else fmt=format;
  1174.   if(fmt==NULL) fmt="gif";
  1175.   if(ismhelp) mh="mh"; else mh="";
  1176.   snprintf(buf,sizeof(buf),"%s/insert%s-%d.%s",s2_prefix,mh,insert_no,fmt);
  1177.   if(grouped_ins) {unlink(buf); goto grouped;}
  1178.   exportall();
  1179.   call_ssh("%s/%s %d %s >%s/ins.out 2>%s/ins.err",
  1180.       bin_dir,script_name,insert_no,tmp_dir,tmp_dir,tmp_dir);
  1181.   unlink(buf); wrapexec=1;
  1182.   if(trusted_module()) setenv("trusted_module","yes",1);
  1183.   else if(untrust) setenv("trusted_module","no",1);
  1184.   call_ssh("mv %s/insert%s-%d.%s %s >/dev/null 2>/dev/null",
  1185.        tmp_dir,mh,insert_no,fmt,s2_prefix);
  1186.   tel=filelength("%s", buf);
  1187.   if(tel<=5) {
  1188.     char bbuf[MAX_LINELEN+1];
  1189.     accessfile(bbuf,"r","%s/ins.err",tmp_dir);
  1190.     snprintf(url,sizeof(url),"gifs/badins.gif");
  1191.     for(p1=bbuf;p1<bbuf+512 && *p1;p1++)
  1192.       if(*p1=='<' || *p1=='>') *p1='?';
  1193.     *p1=0;
  1194.     if(bbuf[0]==0) snprintf(bbuf,sizeof(bbuf),"Fail");
  1195.     snprintf(outbuf+strlen(outbuf),sizeof(outbuf)-strlen(outbuf),
  1196.        " <img src=\"%s\" alt=\"Error\" /> <small><pre>%s</pre></small> <br /> ",
  1197.        url,bbuf);
  1198.     setvar("ins_warn","fail");
  1199.     setvar("ins_cnt","0");
  1200.     goto reset;
  1201.   }
  1202.   grouped:
  1203.   s=getvar(ro_name[ro_session]);
  1204.   b=getvar("ins_border"); at=getvar("ins_attr");
  1205.   tag=getvar("ins_tag");  al=getvar("ins_align");
  1206.   if(at==NULL) at="";
  1207.   if(tag==NULL) tag="";
  1208.   if(al==NULL) al="";
  1209.   al=find_word_start(al);
  1210.   if(*al!=0) snprintf(buf2,sizeof(buf2),"vertical-align:%s",al); else buf2[0]=0;
  1211.   if(strcasecmp(al,"middle")==0) middle=1; else middle=0;
  1212.   tag2=""; vspace=0;
  1213.   if(*tag!=0) {
  1214.     mystrncpy(buf,tag,sizeof(buf)); tag=find_word_start(buf);
  1215.     tag2=find_word_end(tag);
  1216.     if(*tag2!=0) *tag2++=0;
  1217.     tag2=find_word_start(tag2);
  1218.   }
  1219.   if(b==NULL || *b==0) border=0;
  1220.   else border=atoi(b);
  1221.   if(border<0) border=0;
  1222.   if(border>100) border=100;
  1223.   if(middle) {
  1224.     snprintf(outbuf+strlen(outbuf),
  1225.        sizeof(outbuf)-strlen(outbuf),"%s",mathalign_sup1);
  1226.     vspace=2;
  1227.   }
  1228.   mystrncpy(url,ref_name,sizeof(url));
  1229.   for(p1=url+strlen(url);p1>url && *(p1-1)!='/'; p1--);
  1230.   snprintf(p1,sizeof(url)+p1-url,
  1231.          "wims.%s?cmd=getins&+session=%s&+special_parm=insert%s-%d.%s&+modif=%ld",
  1232.          fmt,s,mh,insert_no,fmt,(long)nowtime);
  1233.   if(strchr(ins_alt,'"')!=NULL || strlen(ins_alt)>256) ins_alt[0]=0;
  1234.   pt=getvar("wims_ins_alt"); if(pt==NULL) pt="";
  1235.   if(strcmp(pt,"empty")==0) altbuf[0]=0;
  1236.   else
  1237.     if(ins_alt[0] && strcmp(pt,"none")!=0)
  1238.       snprintf(altbuf,sizeof(altbuf)," alt=\"\"");
  1239.     else
  1240.       snprintf(altbuf,sizeof(altbuf)," alt=\"%s\"",ins_alt);
  1241.   if(strcasecmp(tag,"form")!=0) {
  1242.     snprintf(outbuf+strlen(outbuf),sizeof(outbuf)-strlen(outbuf),
  1243.        "<img src=\"%s\" style=\"border:solid;border-width:%dpx;margin-bottom:%dpx;%s\" %s %s />",
  1244.        url, border, vspace, buf2, at, altbuf);
  1245.   }
  1246.   else {
  1247.     char *n, *nend;
  1248. /* fix: add quotes at name=" " */
  1249.     if(*tag2!=0) {n="name=\"" ; nend="\"";} else {n=""; nend="";}
  1250.     snprintf(outbuf+strlen(outbuf),sizeof(outbuf)-strlen(outbuf),
  1251.         "<input type=\"image\" %s%s%s src=\"%s\" style=\"border:solid;border-width:%dpx;margin-bottom:%dpx;%s\" %s %s />",
  1252.         n,tag2,nend,url,border,vspace,buf2,at,altbuf);
  1253.   }
  1254.   if(middle) snprintf(outbuf+strlen(outbuf),
  1255.            sizeof(outbuf)-strlen(outbuf),"%s",mathalign_sup2);
  1256.   setvar("ins_warn",""); ins_alt[0]=0;
  1257.   setvar("ins_cnt",int2str(insert_no));
  1258.   reset:
  1259.   if(outputing) _output_(outbuf);
  1260.   setvar("ins_out",outbuf);
  1261.   setvar("ins_attr",""); setvar("ins_tag","");
  1262.   setvar("ins_url",url);
  1263.   snprintf(buf2,sizeof(buf2),"insert%s-%d.%s",mh,insert_no,fmt);
  1264.   setvar("ins_filename",buf2);
  1265.   animated_ins=0;
  1266. }
  1267.  
  1268. /* instex: dynamically insert tex outputs */
  1269. void exec_instex(char *p)
  1270. {
  1271.   char *ts, *tc, *f, *mh, buf[MAX_FNAME+1];
  1272.  
  1273.   if(robot_access) {
  1274.     *p=0; return;
  1275.   }
  1276.   f=instex_check_static(p); substit(p);
  1277.   if(f==NULL) {
  1278. /* Use static instex if there is no real substitution
  1279.  * and the source file is not in sessions directory.
  1280.  */
  1281.     calc_instexst(p); if(outputing) _output_(p);
  1282.     return;
  1283.   }
  1284.   if(ismhelp) mh="mh"; else mh="";
  1285.   fix_tex_size(); f="gif";
  1286.   setenv("texgif_style",instex_style,1);
  1287.   tc=getvar("instex_texheader"); if (tc) { setenv("texgif_texheader",tc,1);}
  1288.   setenv("texgif_tmpdir",tmp_dir,1);
  1289.   setenv("texgif_src",p,1);
  1290.   if(ins_alt[0]==0) mystrncpy(ins_alt,p,sizeof(ins_alt));
  1291.   mkfname(buf,"%s/insert%s-%d.gif",tmp_dir,mh,insert_no+1);
  1292.   setenv("texgif_outfile",buf,1);
  1293.   ts=getvar("wims_texsize"); tc=getvar("instex_color");
  1294.   if(lastout_file!=-1 && (tc==NULL || *tc==0) &&
  1295.       (ts==NULL || *ts==0 || strcmp(ts,"0")==0) &&
  1296.      strstr(p,"\\begin{")==NULL) {
  1297.     int ls, ln;
  1298.     char *pagebreak;
  1299.     ls=strlen(instex_src); ln=strlen(instex_fname);
  1300.     if(ls+strlen(p)>=MAX_LINELEN-256 ||
  1301.      ln+strlen(buf)>=MAX_LINELEN-16) {
  1302.         instex_flush(); ls=ln=0;
  1303.     }
  1304.     if(instex_cnt>0) pagebreak="\\pagebreak\n"; else pagebreak="";
  1305.     snprintf(instex_src+ls,MAX_LINELEN-ls,"%s %s %s %s\n",
  1306.          pagebreak,instex_style,p,instex_style);
  1307.     snprintf(instex_fname+ln,MAX_LINELEN-ln,"%s\n",buf);
  1308.       grouped_ins=1;
  1309.   }
  1310.   mkfname(buf,"%s/texgif.dvi",tmp_dir); unlink(buf);
  1311.   wrapexec=0; _exec_ins(p,instex_processor,f);
  1312.   if(grouped_ins) instex_cnt++;
  1313.   grouped_ins=0;
  1314. }
  1315.  
  1316. /* patches the gnuplot integer division (mis)feature. */
  1317. void gnuplot_patch(char *p,int oneline)
  1318. {
  1319.   char *pp;
  1320.   for(pp=strchr(p,'/');pp!=NULL;pp=strchr(pp+1,'/')) {
  1321.     char *p1;
  1322.     if(pp<=p || !myisdigit(*(pp-1)) || !myisdigit(*(pp+1))) continue;
  1323.     for(p1=pp-2;p1>=p && myisdigit(*p1);p1--);
  1324.     if(p1>=p && *p1=='.') continue;
  1325.     for(p1=pp+2;*p1 && myisdigit(*p1);p1++);
  1326.     if(*p1=='.') continue;
  1327.     string_modify(p,p1,p1,".0");
  1328.   }
  1329.   for(pp=strchr(p,'^');pp!=NULL;pp=strchr(pp+1,'^'))
  1330.     string_modify(p,pp,pp+1,"**");
  1331. /* disallow new lines and ';' */
  1332.   if(oneline)
  1333.     for(pp=p;*pp!=0;pp++) if(*pp==';' || *pp=='\n') *pp=' ';
  1334. }
  1335.  
  1336. /* This is to disable pipe in the gnuplot plotting function.
  1337.  * We do not allow ' followed by < .
  1338.  */
  1339. void prepare_insplot_parm(char *p)
  1340. {
  1341.   int i,j,multanim; char *pp, *s;
  1342.   double d;
  1343.   char setbuf[MAX_LINELEN+10],buf[MAX_LINELEN+1];
  1344.  
  1345.   j=strlen(p);
  1346. /* pipe in plot command */
  1347.   for(i=0;i<j;i++) {
  1348.     if(*(p+i)!='\'' && *(p+i)!='"') continue;
  1349.     pp=find_word_start(p+i+1); if(*pp=='<') module_error("illegal_plot_cmd");
  1350.   }
  1351.   gnuplot_patch(p,1);
  1352. /* multiplot */
  1353.   multanim=0;
  1354.   pp=getvar("insplot_split");
  1355.   if(pp!=NULL) i=linenum(pp); else i=0;
  1356. /* arbitrary limit: 16 multiplots */
  1357.   if(i>16) i=16;
  1358.   if(i>1) {
  1359.     char tbuf[MAX_LINELEN*(i+1)+100], bbuf[MAX_LINELEN+1];
  1360.     tbuf[0]=0;
  1361.     if(*p!=0) snprintf(tbuf,sizeof(tbuf),"%s\n",p);
  1362.     snprintf(buf,sizeof(buf),"%d",i); setenv("multiplot",buf,1);
  1363.     for(j=1;j<=i;j++) {
  1364.       snprintf(buf,sizeof(buf),"insplot_parm_%d",j);
  1365.       pp=getvar(buf);
  1366.       if(pp==NULL || *pp==0) {
  1367.         if(j==1 && *p!=0) continue;
  1368.         pp="";
  1369.       }
  1370.       else {
  1371.         mystrncpy(bbuf,pp,sizeof(bbuf));
  1372.         gnuplot_patch(bbuf,1);
  1373.       }
  1374.       strcat(tbuf,bbuf);strcat(tbuf,"\n");
  1375.     }
  1376.     setenv("insplot_source",tbuf,1);
  1377.     if(varchr(tbuf,"s")!=NULL) multanim=1;
  1378.   }
  1379. /* no illegal chaining */
  1380.   pp=getvar("insplot_font"); if(pp!=NULL) {
  1381.     for(s=pp;s<pp+MAX_LINELEN && *s;s++)
  1382.     if(*s==';' || *s=='\n' || *s==' ') *s=0;
  1383.     if(s>=pp+MAX_LINELEN) *s=0;
  1384.     setvar("insplot_font",pp);
  1385.   }
  1386.   pp=getvar("insplot_set");
  1387.   if(pp!=NULL) {
  1388.     char tbuf[MAX_LINELEN+1];
  1389.     mystrncpy(tbuf,pp,sizeof(tbuf));
  1390.     i=strlen(tbuf)-1;
  1391.     while(i>0 && isspace(tbuf[i])) i--;
  1392.     if(tbuf[i]==';') tbuf[i]=0;
  1393.     gnuplot_patch(tbuf,0);pp=tbuf;
  1394.     ovlstrcpy(setbuf,"set "); j=strlen("set ");
  1395.     for(i=0; *(pp+i)!=0 && j<MAX_LINELEN; i++) {
  1396.       if(*(pp+i)=='\n') {setbuf[j++]=' '; continue;}
  1397.       if(*(pp+i)!=';') {setbuf[j++]=*(pp+i); continue;}
  1398.       ovlstrcpy(setbuf+j,"\nset "); j+=strlen("\nset ");
  1399.     }
  1400.     setbuf[j]=0;
  1401.     setenv("insplot_set",setbuf,1);
  1402.   }
  1403.   else setenv("insplot_set","",1);
  1404. /* frames of animation */
  1405.   pp=getvar("ins_anim_frames");
  1406.   if(pp!=NULL) i=evalue(pp); else i=1;
  1407.   if(i>=ANIM_LIMIT) i=ANIM_LIMIT-1;
  1408.   if(i<1) i=1;
  1409.   if(strstr(setbuf,"step")==NULL && strstr(p,"step")==NULL
  1410.      && varchr(setbuf,"s")==NULL && varchr(p,"s")==NULL && !multanim) i=1;
  1411.   setenv("ins_anim_frames",int2str(i),1);
  1412.   setvar("ins_anim_frames","");
  1413.   if(i>1) {setvar("ins_animation","yes");animated_ins=1;}
  1414.   else setvar("ins_animation","no");
  1415. /* delay of animation */
  1416.   pp=getvar("ins_anim_delay");
  1417.   if(pp!=NULL) d=evalue(pp); else d=0;
  1418.   if(d>=10) d=10;
  1419.   if(d<0) d=0;
  1420.   setenv("ins_anim_delay",int2str(d*100),1);
  1421. }
  1422.  
  1423. /* Insert dynamic 2d plot */
  1424. void exec_insplot(char *p)
  1425. {
  1426.   char *fmt;
  1427.   if(robot_access) {
  1428.     *p=0; return;
  1429.   }
  1430.   fmt=getvar("ins_format"); if(fmt==NULL || *fmt==0) fmt=DEFAULT_INS_FORMAT;
  1431.   prepare_insplot_parm(p); setenv("insplot_method","2D",1);
  1432.   _exec_ins(p,insplot_processor,fmt);
  1433.   wrapexec=1;
  1434. /*    call_ssh("mv %s/insplot_cmd %s 2>/dev/null",tmp_dir,s2_prefix); */
  1435.    unsetenv("multiplot"); setvar("insplot_split","");
  1436. }
  1437.  
  1438. /* Insert dynamic 3d plot */
  1439. void exec_insplot3d(char *p)
  1440. {
  1441.   char *fmt;
  1442.   if(robot_access) {
  1443.     *p=0; return;
  1444.   }
  1445.   fmt=getvar("ins_format"); if(fmt==NULL || *fmt==0) fmt=DEFAULT_INS_FORMAT;
  1446.   prepare_insplot_parm(p); setenv("insplot_method","3D",1);
  1447.   _exec_ins(p,insplot_processor,fmt);
  1448.   wrapexec=1;
  1449. /*     call_ssh("mv %s/insplot_cmd %s 2>/dev/null",tmp_dir,s2_prefix); */
  1450.   unsetenv("multiplot");setvar("insplot_split","");
  1451. }
  1452.  
  1453. /* Insert dynamic gif draw. The parm preparation is specific to fly. */
  1454. void exec_insdraw(char *p)
  1455. {
  1456.   char *pp, *fmt;
  1457.   int i;
  1458.   double d;
  1459.  
  1460.   if(robot_access) {
  1461.     *p=0; return;
  1462.   }
  1463. /*    calc_tolower(p);*/
  1464.   fmt=getvar("ins_format"); if(fmt==NULL || *fmt==0) fmt=DEFAULT_INS_FORMAT;
  1465.   while((pp=wordchr(p,"output"))!=NULL) memmove(pp,"zqkwfx",6);
  1466. /* frames of animation */
  1467.   pp=getvar("ins_anim_frames");
  1468.   if(pp!=NULL) i=evalue(pp); else i=1;
  1469.   if(i>=ANIM_LIMIT) i=ANIM_LIMIT-1;
  1470.   if(i<1) i=1;
  1471.   if(i>1 && varchr(p,"s")==NULL && varchr(p,"animstep")==NULL
  1472.      && varchr(p,"step")==NULL) i=1;
  1473.   setenv("ins_anim_frames",int2str(i),1);
  1474.   setvar("ins_anim_frames","");
  1475.   if(i>1) {setvar("ins_animation","yes");animated_ins=1;}
  1476.   else setvar("ins_animation","no");
  1477. /* delay of animation */
  1478.   pp=getvar("ins_anim_delay");
  1479.   if(pp!=NULL) d=evalue(pp); else d=0;
  1480.   if(d>=10) d=10;
  1481.   if(d<0) d=0;
  1482.   setenv("ins_anim_delay",int2str(d*100),1);
  1483.   pp=getvar("insdraw_filebase");
  1484.   if(pp!=NULL && strstr(pp,parent_dir_string)!=NULL)
  1485.     setvar("insdraw_filebase","");
  1486.   _exec_ins(p,insdraw_processor,fmt);
  1487. }
  1488.  
  1489. void exec_increase(char *p)
  1490. {
  1491.   char *p1, *p2;
  1492.   p1=find_word_start(p); p2=find_word_end(p1);
  1493.   if(p2<=p1) {
  1494.     *p=0; return;
  1495.   }
  1496.   *p2=0;p2=getvar(p1);
  1497.   if(p2==NULL) p2="";
  1498.   setvar(p1,int2str(atoi(p2)+1)); *p=0;
  1499. }
  1500.  
  1501. void exec_setseed(char *p)
  1502. {
  1503.   char buf[64];
  1504.   snprintf(buf,sizeof(buf),"%s",p);
  1505.   force_setvar("wims_seed",buf);
  1506.   double d=evalue(p);
  1507.   srandom(d); *p=0;
  1508. }
  1509.  
  1510. /* bound a variable */
  1511. void exec_bound(char *p)
  1512. {
  1513.   char *p1, *p2, *p3;
  1514.   int doub,i,bcnt,defaulted;
  1515.   double d1,d2,dd,val;
  1516.   char nbuf[MAX_LINELEN+1],lbuf[MAX_LINELEN+1],dbuf[MAX_LINELEN+1];
  1517.   char vbuf[MAX_LINELEN+1];
  1518.   char *blist[2048];
  1519.  
  1520.   p1=find_word_start(p); p2=find_word_end(p1);
  1521.   if(*p2==0) {
  1522.     syntax: module_error("syntax_error");
  1523.   }
  1524.   *p2=0; ovlstrcpy(nbuf,p1);substit(nbuf); p1=find_word_start(p2+1);
  1525.   p2=getvar(nbuf);if(p2==NULL) p2="";
  1526.   mystrncpy(vbuf,find_word_start(p2),sizeof(vbuf));
  1527.   strip_trailing_spaces(vbuf);
  1528.   p2=find_word_end(p1); if(*p2==0) goto syntax;
  1529.   *p2=0;p2++;
  1530.   p3=wordchr(p2,"default");
  1531.   if(p3!=NULL) {
  1532.     *p3=0; defaulted=1;
  1533.     p3=find_word_start(p3+strlen("default"));
  1534.     ovlstrcpy(dbuf,p3); substit(dbuf);
  1535.   }
  1536.   else defaulted=0;
  1537.   if(strcmp(p1,"between")==0) {
  1538.     p1=find_word_start(p2);
  1539.     i=strlen("integer");
  1540.     if(strncmp(p1,"integer",i)==0 &&
  1541.         (isspace(*(p1+i)) || (*(p1+i)=='s' && isspace(*(p1+i+1))))) {
  1542.       doub=0; p1=find_word_start(find_word_end(p1));
  1543.       val=rint(evalue(vbuf));
  1544.       if(vbuf[0]) float2str(val,vbuf);
  1545.     }
  1546.     else {
  1547.       doub=1;val=evalue(vbuf);
  1548.     }
  1549.     p2=wordchr(p1,"and"); p3=p2+strlen("and");
  1550.     if(p2==NULL) {
  1551.       p2=strchr(p1,','); p3=p2+1;
  1552.     }
  1553.     if(p2==NULL) goto syntax;
  1554.    *p2=0;p2=find_word_start(p3);
  1555.     if(*p1==0 || *p2==0) goto syntax;
  1556.     d1=evalue(p1);d2=evalue(p2);
  1557.     if(!isfinite(d1) || !isfinite(d2) ||
  1558.       fabs(d1)>(double)(1E10) || fabs(d2)>(double)(1E10)) goto syntax;
  1559.     if(d1>d2) {
  1560.       dd=d1;d1=d2;d2=dd;
  1561.     }
  1562.     if(vbuf[0] && val<=d2 && val>=d1) {
  1563.       if(!doub) setvar(nbuf,vbuf);
  1564.       *p=0; return;
  1565.     }
  1566.     if(defaulted) ovlstrcpy(p,dbuf);
  1567.     else {
  1568.       if(!doub) {
  1569.         d1=ceil(d1);d2=floor(d2);
  1570.       }
  1571.       if(vbuf[0]==0 || val<d1) val=d1;
  1572.       else val=d2;
  1573.       float2str(val,p);
  1574.     }
  1575.     setvar(nbuf,p); *p=0; return;
  1576.   }
  1577.   else {
  1578.     if(strcmp(p1,"within")==0 || strcmp(p1,"among")==0) {
  1579.       ovlstrcpy(lbuf,p2);substit(lbuf);
  1580.       bcnt=cutitems(lbuf,blist,2048);
  1581.       if(bcnt<=0) {
  1582.         *p=0; return;
  1583.       }
  1584.       for(i=0;i<bcnt;i++) {
  1585.         if(strcmp(blist[i],vbuf)==0) {
  1586.           *p=0; return;
  1587.         }
  1588.       }
  1589.       if(defaulted) ovlstrcpy(p,dbuf); else ovlstrcpy(p,blist[0]);
  1590.       setvar(nbuf,p); *p=0;
  1591.       return;
  1592.     }
  1593.   else goto syntax;
  1594.   }
  1595. }
  1596.  
  1597. /* detrust the module. */
  1598. void exec_detrust(char *p)
  1599. {
  1600.   untrust|=1; *p=0;
  1601. }
  1602.  
  1603. void exec_warn(char *p)
  1604. {
  1605.   char *p1,*p2;
  1606.   char buf[MAX_FNAME+1];
  1607.   WORKING_FILE save;
  1608.  
  1609.   if(!outputing) goto end;
  1610.   p1=find_word_start(p);p2=find_word_end(p1);
  1611.   if(p2<=p1) goto end;
  1612.   *p2=0;
  1613.   snprintf(buf,sizeof(buf),"wims_warn_%s",p1);
  1614.   p2=getvar(buf);
  1615.   if(p2==NULL || *p2==0) goto end;
  1616.   p2=getvar("module_language");if(p2==NULL) p2="en";
  1617.   mkfname(buf,"msg/warn_%s.phtml.%s",p1,p2);
  1618.   memmove(&save,&m_file,sizeof(WORKING_FILE));
  1619.   if(open_working_file(&m_file,buf)==0) phtml_put(NULL,0);
  1620.   memmove(&m_file,&save,sizeof(WORKING_FILE));
  1621.   end:
  1622.   *p=0; return;
  1623. }
  1624.  
  1625. /* write an error message. */
  1626. void exec_msg(char *p)
  1627. {
  1628.   char *p1,*p2, buf[64], *l;
  1629.   secure_exec();
  1630.   p1=find_word_start(p); p2=find_word_end(p1);
  1631.   if(*p2) {
  1632.     *p2=0; p2=find_word_start(p2+1);
  1633.   }
  1634.   force_setvar("wims_error",p1); force_setvar("wims_error_parm",p2);
  1635.   l=getvar("module_language");
  1636.   if(l!=NULL && strlen(l)==2) {
  1637.     snprintf(buf,sizeof(buf),"msg.phtml.%s",l);
  1638.     phtml_put_base(buf,0);
  1639.   }
  1640.   *p=0;
  1641. }
  1642.  
  1643. struct distr_cmd distr_cmd[]={
  1644.   {"char",      NULL},
  1645.   {"charof",    NULL},
  1646.   {"chars",     NULL},
  1647.   {"charsof",   NULL},
  1648.   {"item",      cutitems},
  1649.   {"itemof",    cutitems},
  1650.   {"items",     cutitems},
  1651.   {"itemsof",   cutitems},
  1652.   {"line",      cutlines},
  1653.   {"lineof",    cutlines},
  1654.   {"lines",     cutlines},
  1655.   {"linesof",   cutlines},
  1656.   {"list",      cutitems},
  1657.   {"word",      cutwords},
  1658.   {"wordof",    cutwords},
  1659.   {"words",     cutwords},
  1660.   {"wordsof",   cutwords}
  1661. };
  1662.  
  1663. int distr_cmd_no=(sizeof(distr_cmd)/sizeof(distr_cmd[0]));
  1664.  
  1665. /* distribute a number of lines, items, etc. into a list of vars. */
  1666. void exec_distribute(char *p)
  1667. {
  1668.   int i,k,n;
  1669.   char *p1, *p2;
  1670.   char bf1[MAX_LINELEN+1],bf2[MAX_LINELEN+1];
  1671.   char *names[4096],*vals[4096];
  1672.   p1=find_word_start(p); p2=find_word_end(p1);
  1673.   if(p2<=p1 || *p2==0) module_error("syntax_error");
  1674.   *p2++=0;
  1675.   i=search_list(distr_cmd,distr_cmd_no,sizeof(distr_cmd[0]),p1);
  1676.   if(i<0) module_error("syntax_error");
  1677.   p2=find_word_start(p2); p1=wordchr(p2,"into");
  1678.   if(p1==NULL) module_error("syntax_error");
  1679.   *p1=0;mystrncpy(bf1,p2,sizeof(bf1));
  1680.   p1=find_word_start(p1+strlen("into"));
  1681.   mystrncpy(bf2,p1,sizeof(bf2));
  1682.   substit(bf1);substit(bf2);
  1683.   strip_trailing_spaces(bf1);
  1684.   items2words(bf2); n=cutwords(bf2,names,4096);
  1685.   if(distr_cmd[i].routine!=NULL) {
  1686.     k=distr_cmd[i].routine(bf1,vals,n);
  1687.     for(i=0;i<k;i++) setvar(names[i],vals[i]);
  1688.     for(;i<n;i++) setvar(names[i],"");
  1689.   }
  1690.   else {
  1691.     char buf[2];
  1692.     buf[1]=0;
  1693.     for(p1=bf1,i=0;i<n;i++) {
  1694.       buf[0]=*p1; if(*p1) p1++;
  1695.       setvar(names[i],buf);
  1696.     }
  1697.   }
  1698. }
  1699.  
  1700. /* reset variables */
  1701. void exec_reset(char *p)
  1702. {
  1703.   char *p1, *p2;
  1704.  
  1705.   items2words(p);
  1706.   for(p1=find_word_start(p); *p1; p1=find_word_start(p2)) {
  1707.     p2=find_word_end(p1); if(*p2) *p2++=0;
  1708.     setvar(p1,"");
  1709.   }
  1710. }
  1711.  
  1712. /* exchange the values of two variables */
  1713. void exec_exchange(char *p)
  1714. {
  1715.   char buf[MAX_LINELEN+1],b1[MAX_LINELEN+1],b2[MAX_LINELEN+1];
  1716.   char *p1,*p2,*pb;
  1717.   p1=wordchr(p,"and");
  1718.   if(p1!=NULL) {
  1719.     *p1=0; p2=find_word_start(p1+strlen("and"));
  1720.   }
  1721.   else {
  1722.     p1=strchr(p,',');
  1723.     if(p1==NULL) module_error("syntax_error");
  1724.     *p1=0; p2=find_word_start(p1+1);
  1725.   }
  1726.   p1=find_word_start(p);
  1727.   mystrncpy(b1,p1,sizeof(b1)); substit(b1); *find_word_end(b1)=0;
  1728.   mystrncpy(b2,p2,sizeof(b2)); substit(b2); *find_word_end(b2)=0;
  1729.   if(*b1==0 || *b2==0) module_error("syntax_error");
  1730.   pb=getvar(b1);if(pb==NULL) pb="";
  1731.   mystrncpy(buf,pb,sizeof(buf));
  1732.   pb=getvar(b2);if(pb==NULL) pb="";
  1733.   setvar(b1,pb); setvar(b2,buf);
  1734. }
  1735.  
  1736. /* Send a mail */
  1737. void exec_mailto(char *p)
  1738. {
  1739.   char *p1,*p2,*pp;
  1740.  
  1741.   if(!trusted_module() || is_class_module) return;
  1742.   p1=strchr(p,'\n'); if(p1==NULL) return;
  1743.   *p1++=0; p=find_word_start(p);
  1744.   if(*p==0) return;
  1745.   p2=strchr(p1,'\n'); if(p2==NULL) return;
  1746.   *p2++=0;
  1747.   for(pp=p1;*pp;pp++) if(*pp=='"' || *pp=='\n') *pp=' ';
  1748.   accessfile(p2,"w","%s/mail.body",tmp_dir);
  1749.   wrapexec=1;
  1750.   call_sh("mail %s -s \" %s \nContent-Type: text/html\" %s <%s/mail.body; chmod og-rwx %s/mail.body",
  1751.       mail_opt, p1,p,tmp_dir,tmp_dir);
  1752.   mail_log(p);
  1753.   *p=0;
  1754. }
  1755.  
  1756. /* Generates a user error. Internal and undocumented. */
  1757. void exec_usererror(char *p)
  1758. {
  1759.   if(trusted_module()) user_error(p);
  1760. }
  1761.  
  1762. /* stop output. */
  1763. void exec_directout(char *p)
  1764. {
  1765.   if(outputing || !trusted_module()) return;
  1766.   printf("%s",p);
  1767.   noout=1;
  1768. }
  1769.  
  1770. enum {
  1771.   EXEC_IF, EXEC_JUMP, EXEC_ELSE, EXEC_ENDIF, EXEC_EXEC,
  1772.   EXEC_WHILE, EXEC_ENDWHILE,
  1773.   EXEC_FOR, EXEC_VAR, EXEC_DEBUG, EXEC_DAEMON,
  1774.   EXEC_SET, EXEC_DEFAULT, EXEC_COMMENT, EXEC_READ, EXEC_HREF,
  1775.   EXEC_INS, EXEC_STRING, EXEC_PEDIA, EXEC_DIR,
  1776.   EXEC_TRUST, EXEC_WARN, EXEC_ERROR, EXEC_SQL, EXEC_SCORE,
  1777.   EXEC_MAIL, EXEC_OTHER
  1778. } EXEC_TYPES;
  1779. #define EXEC_SUBST 0x1000
  1780. #define EXEC_USECALC 0x2000
  1781. #define EXEC_PROCTOO 0x4000
  1782. MYFUNCTION exec_routine[]={
  1783.   {"!",        EXEC_COMMENT,        exec_comment},
  1784.   {"TeXmath",  EXEC_STRING|EXEC_SUBST|EXEC_USECALC,texmath},
  1785.   {"add",      EXEC_STRING|EXEC_USECALC,calc_sum},
  1786.   {"advance",  EXEC_VAR|EXEC_SUBST,   exec_increase},
  1787.   {"append",   EXEC_STRING|EXEC_USECALC,calc_append},
  1788.   {"appendfile",EXEC_DIR|EXEC_SUBST,    fileappend},
  1789.   {"bound",     EXEC_STRING,       exec_bound},
  1790.   {"break",     EXEC_FOR,        exec_break},
  1791.   {"call",      EXEC_EXEC|EXEC_SUBST|EXEC_PROCTOO|EXEC_USECALC,    calc_exec},
  1792.   {"changeto",  EXEC_READ|EXEC_SUBST,    exec_changeto},
  1793.   {"char",      EXEC_STRING|EXEC_USECALC,calc_charof},
  1794.   {"chars",     EXEC_STRING|EXEC_USECALC,calc_charof},
  1795.   {"checkhost", EXEC_STRING|EXEC_USECALC|EXEC_SUBST,calc_checkhost},
  1796.   {"column",    EXEC_STRING|EXEC_USECALC,calc_columnof},
  1797.   {"columns",   EXEC_STRING|EXEC_USECALC,calc_columnof},
  1798.   {"comment",   EXEC_COMMENT,        exec_comment},
  1799.   {"daemon",    EXEC_DAEMON|EXEC_USECALC|EXEC_SUBST,calc_daemon},
  1800.   {"date",      EXEC_STRING|EXEC_USECALC|EXEC_SUBST,calc_date},
  1801.   {"deaccent",  EXEC_STRING|EXEC_USECALC|EXEC_SUBST,deaccent},
  1802.   {"debug",     EXEC_DEBUG,        calc_debug},
  1803.   {"declosing", EXEC_STRING|EXEC_USECALC|EXEC_SUBST,calc_declosing},
  1804.   {"def",       EXEC_SET,        exec_set},
  1805.   {"default",   EXEC_SET,        exec_default},
  1806.   {"define",    EXEC_SET,        exec_set},
  1807.   {"definitionof", EXEC_SCORE|EXEC_USECALC,calc_defof},
  1808.   {"defof",     EXEC_SCORE|EXEC_USECALC,calc_defof},
  1809.   {"defread",   EXEC_READ|EXEC_SUBST,    exec_defread},
  1810.   {"detag",     EXEC_STRING|EXEC_USECALC|EXEC_SUBST,calc_detag},
  1811.   {"detrust",   EXEC_TRUST,        exec_detrust},
  1812. /*      {"dictionary",EXEC_STRING|EXEC_USECALC,calc_dictionary},    */
  1813.   {"dir",       EXEC_DIR|EXEC_SUBST|EXEC_USECALC,calc_listfile},
  1814.   {"distribute",EXEC_STRING,        exec_distribute},
  1815.   {"distrust",  EXEC_TRUST,        exec_detrust},
  1816.   {"else",      EXEC_ELSE,        exec_else},
  1817.   {"embraced",  EXEC_STRING|EXEC_USECALC,calc_embraced},
  1818.   {"encyclo",   EXEC_PEDIA|EXEC_SUBST|EXEC_USECALC,pedia},
  1819.   {"encyclopedia",EXEC_PEDIA|EXEC_SUBST|EXEC_USECALC,pedia},
  1820.   {"endif",     EXEC_ENDIF,        exec_endif},
  1821.   {"endwhile",  EXEC_ENDWHILE,        exec_endwhile},
  1822.   {"evalsubst", EXEC_STRING|EXEC_USECALC,calc_evalsubst},
  1823.   {"evalsubstit",EXEC_STRING|EXEC_USECALC,calc_evalsubst},
  1824.   {"evalsubstitute",EXEC_STRING|EXEC_USECALC,calc_evalsubst},
  1825.   {"evaluesubst",EXEC_STRING|EXEC_USECALC,calc_evalsubst},
  1826.   {"evaluesubstit",EXEC_STRING|EXEC_USECALC,calc_evalsubst},
  1827.   {"evaluesubstitute",EXEC_STRING|EXEC_USECALC,calc_evalsubst},
  1828.   {"examscore", EXEC_SCORE|EXEC_SUBST|EXEC_USECALC,calc_examscore},
  1829.   {"exchange",  EXEC_STRING,        exec_exchange},
  1830.   {"exec",      EXEC_EXEC|EXEC_SUBST|EXEC_PROCTOO|EXEC_USECALC,    calc_exec},
  1831.   {"execute",   EXEC_EXEC|EXEC_SUBST|EXEC_PROCTOO|EXEC_USECALC,    calc_exec},
  1832.   {"exit",      EXEC_JUMP,        exec_exit},
  1833.   {"fileappend",EXEC_DIR|EXEC_SUBST,    fileappend},
  1834.   {"fileexists",EXEC_STRING|EXEC_USECALC, calc_fileexists},
  1835.   {"filelist",  EXEC_DIR|EXEC_SUBST|EXEC_USECALC,calc_listfile},
  1836.   {"fileout",   EXEC_HREF|EXEC_SUBST,    exec_getfile},
  1837.   {"filewrite", EXEC_DIR|EXEC_SUBST,    filewrite},
  1838.   {"filexists",EXEC_STRING|EXEC_USECALC, calc_fileexists},
  1839.   {"for",       EXEC_FOR,        exec_for},
  1840.   {"form",      EXEC_HREF|EXEC_SUBST,    exec_form},
  1841.   {"formbar",   EXEC_HREF,        exec_formbar},
  1842.   {"formcheckbox",EXEC_HREF,        exec_formcheckbox},
  1843.   {"formend",   EXEC_STRING,    exec_formend},
  1844.   {"formradio", EXEC_HREF,        exec_formradio},
  1845.   {"formradiobar",EXEC_HREF,        exec_formbar},
  1846.   {"formselect",EXEC_HREF,        exec_formselect},
  1847.   {"getdef",    EXEC_SCORE|EXEC_USECALC,calc_defof},
  1848.   {"getfile",   EXEC_HREF|EXEC_SUBST,    exec_getfile},
  1849.   {"getscore",  EXEC_SCORE|EXEC_SUBST|EXEC_USECALC,calc_getscore},
  1850.   {"getscorebest",EXEC_SCORE|EXEC_SUBST|EXEC_USECALC,calc_getscorebest},
  1851.   {"getscorelast",EXEC_SCORE|EXEC_SUBST|EXEC_USECALC,calc_getscorelast},
  1852.   {"getscorelevel",EXEC_SCORE|EXEC_SUBST|EXEC_USECALC,calc_getscorelevel},
  1853.   {"getscoremean",EXEC_SCORE|EXEC_SUBST|EXEC_USECALC,calc_getscoremean},
  1854.   {"getscorepercent",EXEC_SCORE|EXEC_SUBST|EXEC_USECALC,calc_getscorepercent},
  1855.   {"getscorequality",EXEC_SCORE|EXEC_SUBST|EXEC_USECALC,calc_getscoremean},
  1856.   {"getscoreremain",EXEC_SCORE|EXEC_SUBST|EXEC_USECALC,calc_getscoreremain},
  1857.   {"getscorerequire",EXEC_SCORE|EXEC_SUBST|EXEC_USECALC,calc_getscorerequire},
  1858.   {"getscoretry",EXEC_SCORE|EXEC_SUBST|EXEC_USECALC,calc_getscoretry},
  1859.   {"getscoreweight",EXEC_SCORE|EXEC_SUBST|EXEC_USECALC,calc_getscoreweight},
  1860.   {"goto",      EXEC_JUMP|EXEC_SUBST,    exec_goto},
  1861.   {"header",    EXEC_HREF,        exec_header},
  1862.   {"header1",   EXEC_HREF,        exec_header1},
  1863.   {"headmenu",  EXEC_HREF,        exec_headmenu},
  1864.   {"hex",       EXEC_STRING|EXEC_SUBST|EXEC_USECALC,calc_hex},
  1865.   {"homeref",   EXEC_HREF,        exec_homeref},
  1866.   {"href",      EXEC_HREF,        exec_href},
  1867.   {"html2iso",  EXEC_STRING|EXEC_USECALC|EXEC_SUBST,calc_html2iso},
  1868.   {"htmlbar",   EXEC_HREF,        exec_formbar},
  1869.   {"htmlcheckbox",EXEC_HREF,        exec_formcheckbox},
  1870.   {"htmlheader",EXEC_HREF,        exec_header},
  1871.   {"htmlmath",  EXEC_STRING|EXEC_SUBST|EXEC_USECALC,htmlmath},
  1872.   {"htmlradio", EXEC_HREF,        exec_formradio},
  1873.   {"htmlradiobar",EXEC_HREF,        exec_formbar},
  1874.   {"htmlselect",EXEC_HREF,        exec_formselect},
  1875.   {"htmltail",  EXEC_HREF,        exec_tail},
  1876.   {"htmltitle", EXEC_HREF,        exec_title},
  1877.   {"if",        EXEC_IF,        exec_if},
  1878.   {"ifval",     EXEC_IF,        exec_ifval},
  1879.   {"ifvalue",   EXEC_IF,        exec_ifval},
  1880.   {"imgrename", EXEC_STRING|EXEC_USECALC|EXEC_SUBST,calc_imgrename},
  1881.   {"include",   EXEC_READ|EXEC_SUBST,   exec_read},
  1882.   {"increase",  EXEC_VAR|EXEC_SUBST,    exec_increase},
  1883.   {"input",     EXEC_READ|EXEC_SUBST,    exec_read},
  1884.   {"insdraw",   EXEC_INS|EXEC_SUBST,    exec_insdraw},
  1885.   {"insmath",   EXEC_INS,        insmath},
  1886.   {"inspaint",  EXEC_INS|EXEC_SUBST,    exec_insdraw},
  1887.   {"insplot",   EXEC_INS|EXEC_SUBST,    exec_insplot},
  1888.   {"insplot3d", EXEC_INS|EXEC_SUBST,    exec_insplot3d},
  1889.   {"instex",    EXEC_INS,        exec_instex},
  1890.   {"instexst",  EXEC_INS|EXEC_USECALC,    calc_instexst},
  1891.   {"instexstatic",EXEC_INS|EXEC_USECALC,    calc_instexst},
  1892.   {"item",        EXEC_STRING|EXEC_USECALC,calc_itemof},
  1893.   {"items",     EXEC_STRING|EXEC_USECALC,calc_itemof},
  1894.   {"items2lines", EXEC_STRING|EXEC_SUBST|EXEC_USECALC,items2lines},
  1895.   {"items2words",EXEC_STRING|EXEC_SUBST|EXEC_USECALC,items2words},
  1896.   {"itemstolines",EXEC_STRING|EXEC_SUBST|EXEC_USECALC,items2lines},
  1897.   {"itemstowords",EXEC_STRING|EXEC_SUBST|EXEC_USECALC,items2words},
  1898.   {"let",        EXEC_SET,        exec_set},
  1899.   {"leveldata",  EXEC_STRING|EXEC_USECALC,calc_leveldata},
  1900.   {"levelpoints",EXEC_STRING|EXEC_USECALC,calc_leveldata},
  1901.   {"line",       EXEC_STRING|EXEC_USECALC,calc_lineof},
  1902.   {"lines",      EXEC_STRING|EXEC_USECALC,calc_lineof},
  1903.   {"lines2items",EXEC_STRING|EXEC_SUBST|EXEC_USECALC,lines2items},
  1904.   {"lines2list", EXEC_STRING|EXEC_SUBST|EXEC_USECALC,lines2items},
  1905.   {"lines2words",EXEC_STRING|EXEC_SUBST|EXEC_USECALC,lines2words},
  1906.   {"linestoitems",EXEC_STRING|EXEC_SUBST|EXEC_USECALC,lines2items},
  1907.   {"linestolist",EXEC_STRING|EXEC_SUBST|EXEC_USECALC,lines2items},
  1908.   {"linestowords",EXEC_STRING|EXEC_SUBST|EXEC_USECALC,lines2words},
  1909.   {"list2lines", EXEC_STRING|EXEC_SUBST|EXEC_USECALC,items2lines},
  1910.   {"list2words", EXEC_STRING|EXEC_SUBST|EXEC_USECALC,items2words},
  1911.   {"listfile",   EXEC_DIR|EXEC_SUBST|EXEC_USECALC,calc_listfile},
  1912.   {"listfiles",  EXEC_DIR|EXEC_SUBST|EXEC_USECALC,calc_listfile},
  1913.   {"listintersect",EXEC_STRING|EXEC_USECALC,calc_listintersect},
  1914.   {"listintersection", EXEC_STRING|EXEC_USECALC,calc_listintersect},
  1915.   {"listtolines",EXEC_STRING|EXEC_SUBST|EXEC_USECALC,items2lines},
  1916.   {"listtowords",EXEC_STRING|EXEC_SUBST|EXEC_USECALC,items2words},
  1917.   {"listunion",  EXEC_STRING|EXEC_USECALC,calc_listunion},
  1918.   {"listuniq",   EXEC_STRING|EXEC_SUBST|EXEC_USECALC,calc_listuniq},
  1919.   {"listunique", EXEC_STRING|EXEC_SUBST|EXEC_USECALC,calc_listuniq},
  1920.   {"listvar",    EXEC_STRING|EXEC_SUBST|EXEC_USECALC,mathvarlist},
  1921.   {"lookup",     EXEC_STRING|EXEC_USECALC,    calc_lookup},
  1922.   {"lower",      EXEC_STRING|EXEC_SUBST|EXEC_USECALC,calc_tolower},
  1923.   {"lowercase",  EXEC_STRING|EXEC_SUBST|EXEC_USECALC,calc_tolower},
  1924.   {"ls",         EXEC_DIR|EXEC_SUBST|EXEC_USECALC,calc_listfile},
  1925.   {"mailto",     EXEC_MAIL|EXEC_SUBST,    exec_mailto},
  1926.   {"mailurl",    EXEC_MAIL|EXEC_SUBST|EXEC_USECALC,calc_mailurl},
  1927.   {"makelist",   EXEC_STRING|EXEC_USECALC,calc_makelist},
  1928.   {"math2html",  EXEC_STRING|EXEC_SUBST|EXEC_USECALC,htmlmath},
  1929.   {"math2mathml",EXEC_STRING|EXEC_SUBST|EXEC_USECALC,mathmlmath},
  1930.   {"math2tex",   EXEC_STRING|EXEC_SUBST|EXEC_USECALC,texmath},
  1931.   {"mathmlmath", EXEC_STRING|EXEC_SUBST|EXEC_USECALC,mathmlmath},
  1932.   {"mathsubst",  EXEC_STRING|EXEC_USECALC,calc_mathsubst},
  1933.   {"mathsubstit",EXEC_STRING|EXEC_USECALC,calc_mathsubst},
  1934.   {"mathsubstitute",EXEC_STRING|EXEC_USECALC,calc_mathsubst},
  1935.   {"mexec",     EXEC_EXEC|EXEC_SUBST,    exec_mexec},
  1936.   {"module",    EXEC_STRING|EXEC_SUBST|EXEC_USECALC,calc_module},
  1937.   {"msg",       EXEC_EXEC|EXEC_SUBST,exec_msg},
  1938.   {"multiply",  EXEC_STRING|EXEC_USECALC,calc_product},
  1939.   {"next",      EXEC_FOR,        exec_next},
  1940.   {"nocache",   EXEC_READ,        exec_nocache},
  1941.   {"non_empty", EXEC_STRING|EXEC_SUBST|EXEC_USECALC,calc_nonempty},
  1942.   {"nonempty",  EXEC_STRING|EXEC_SUBST|EXEC_USECALC,calc_nonempty},
  1943.   {"nospace",   EXEC_STRING|EXEC_SUBST|EXEC_USECALC,nospace},
  1944.   {"outfile",   EXEC_HREF|EXEC_SUBST,    exec_getfile},
  1945.   {"pedia",     EXEC_PEDIA|EXEC_SUBST|EXEC_USECALC,pedia},
  1946.   {"perl",      EXEC_EXEC|EXEC_PROCTOO|EXEC_SUBST,exec_perl},
  1947.   {"position",  EXEC_STRING|EXEC_USECALC,calc_pos},
  1948.   {"positionof",EXEC_STRING|EXEC_USECALC,calc_pos},
  1949.   {"positions", EXEC_STRING|EXEC_USECALC,calc_pos},
  1950.   {"prod",      EXEC_STRING|EXEC_USECALC,calc_product},
  1951.   {"product",   EXEC_STRING|EXEC_USECALC,calc_product},
  1952.   {"rawmath",   EXEC_STRING|EXEC_SUBST|EXEC_USECALC,rawmath},
  1953.   {"rawmatrix", EXEC_STRING|EXEC_SUBST|EXEC_USECALC,rawmatrix},
  1954.   {"reaccent",  EXEC_STRING|EXEC_USECALC|EXEC_SUBST,reaccent},
  1955.   {"read",      EXEC_READ|EXEC_SUBST,    exec_read},
  1956.   {"readdef",   EXEC_READ|EXEC_SUBST,    exec_defread},
  1957.   {"readproc",  EXEC_READ|EXEC_SUBST,    exec_readproc},
  1958.   {"record",    EXEC_STRING|EXEC_USECALC,calc_recordof},
  1959.   {"records",   EXEC_STRING|EXEC_USECALC,calc_recordof},
  1960.   {"recursion", EXEC_STRING|EXEC_USECALC,calc_recursion},
  1961.   {"reinput",   EXEC_STRING|EXEC_USECALC|EXEC_SUBST,calc_reinput},
  1962.   {"rem",       EXEC_COMMENT,        exec_comment},
  1963.   {"remark",    EXEC_COMMENT,        exec_comment},
  1964.   {"replace",   EXEC_STRING|EXEC_USECALC,calc_replace},
  1965.   {"reset",     EXEC_SET|EXEC_SUBST,    exec_reset},
  1966.   {"restart",   EXEC_JUMP|EXEC_SUBST,    exec_restart},
  1967.   {"return",    EXEC_JUMP,        exec_exit},
  1968.   {"robotrap",  EXEC_HREF|EXEC_SUBST,    exec_robottrap},
  1969.   {"robottrap", EXEC_HREF|EXEC_SUBST,    exec_robottrap},
  1970.   {"rootof",    EXEC_STRING|EXEC_USECALC,calc_solve},
  1971.   {"row",       EXEC_STRING|EXEC_USECALC,calc_rowof},
  1972.   {"rows",      EXEC_STRING|EXEC_USECALC,calc_rowof},
  1973.   {"rows2lines",EXEC_STRING|EXEC_USECALC|EXEC_SUBST,calc_rows2lines},
  1974.   {"run",       EXEC_EXEC|EXEC_SUBST|EXEC_PROCTOO|EXEC_USECALC,    calc_exec},
  1975.   {"select",    EXEC_STRING|EXEC_USECALC,calc_select},
  1976.   {"set",       EXEC_SET,        exec_set},
  1977.   {"setdef",    EXEC_OTHER,        exec_setdef},
  1978.   {"setseed",   EXEC_STRING|EXEC_SUBST,        exec_setseed},
  1979.   {"sh",        EXEC_EXEC|EXEC_PROCTOO|EXEC_SUBST,exec_sh},
  1980.   {"shortout",  EXEC_JUMP|EXEC_SUBST,    exec_directout},
  1981.   {"singlespace",EXEC_STRING|EXEC_SUBST|EXEC_USECALC,singlespace},
  1982.   {"solve",     EXEC_STRING|EXEC_USECALC,calc_solve},
  1983.   {"sort",      EXEC_STRING|EXEC_USECALC, calc_sort},
  1984. /*      {"sql",     EXEC_SQL|EXEC_SUBST|EXEC_USECALC, calc_sql}, */
  1985.   {"staticinstex",EXEC_INS|EXEC_USECALC,    calc_instexst},
  1986.   {"stinstex",  EXEC_INS|EXEC_USECALC,    calc_instexst},
  1987.   {"sum",       EXEC_STRING|EXEC_USECALC,calc_sum},
  1988.   {"system",    EXEC_EXEC|EXEC_PROCTOO|EXEC_SUBST,exec_sh},
  1989.   {"tail",      EXEC_HREF,        exec_tail},
  1990.   {"test",      EXEC_DEBUG,        exec_test},
  1991.   {"texmath",   EXEC_STRING|EXEC_SUBST|EXEC_USECALC,texmath},
  1992.   {"text",      EXEC_STRING|EXEC_USECALC,text},
  1993.   {"title",     EXEC_HREF,        exec_title},
  1994.   {"tohex",     EXEC_STRING|EXEC_SUBST|EXEC_USECALC,calc_hex},
  1995.   {"tolower",   EXEC_STRING|EXEC_SUBST|EXEC_USECALC,calc_tolower},
  1996.   {"toupper",   EXEC_STRING|EXEC_SUBST|EXEC_USECALC,calc_toupper},
  1997.   {"translate", EXEC_STRING|EXEC_USECALC,calc_translate},
  1998.   {"trim",      EXEC_STRING|EXEC_USECALC,calc_trim},
  1999.   {"upper",     EXEC_STRING|EXEC_SUBST|EXEC_USECALC,calc_toupper},
  2000.   {"uppercase", EXEC_STRING|EXEC_SUBST|EXEC_USECALC,calc_toupper},
  2001.   {"usererror", EXEC_WARN|EXEC_SUBST,    exec_usererror},
  2002.   {"values",    EXEC_STRING|EXEC_USECALC,calc_values},
  2003.   {"varlist",   EXEC_STRING|EXEC_SUBST|EXEC_USECALC,mathvarlist},
  2004.   {"warn",      EXEC_WARN|EXEC_SUBST,    exec_warn},
  2005.   {"warning",   EXEC_WARN|EXEC_SUBST,    exec_warn},
  2006.   {"while",     EXEC_WHILE,        exec_while},
  2007.   {"whileval",  EXEC_WHILE,        exec_whileval},
  2008.   {"whilevalue",EXEC_WHILE,        exec_whileval},
  2009.   {"wimsheader",EXEC_HREF,        exec_header},
  2010.   {"wimsref",   EXEC_HREF,        exec_homeref},
  2011.   {"wimstail",  EXEC_HREF,        exec_tail},
  2012.   {"wimstitle", EXEC_HREF,        exec_title},
  2013.   {"word",      EXEC_STRING|EXEC_USECALC,calc_wordof},
  2014.   {"words",     EXEC_STRING|EXEC_USECALC,calc_wordof},
  2015.   {"words2items",EXEC_STRING|EXEC_SUBST|EXEC_USECALC,words2items},
  2016.   {"words2lines",EXEC_STRING|EXEC_SUBST|EXEC_USECALC,words2lines},
  2017.   {"words2list",EXEC_STRING|EXEC_SUBST|EXEC_USECALC,words2items},
  2018.   {"wordstoitems",EXEC_STRING|EXEC_SUBST|EXEC_USECALC,words2items},
  2019.   {"wordstolines",EXEC_STRING|EXEC_SUBST|EXEC_USECALC,words2lines},
  2020.   {"wordstolist",EXEC_STRING|EXEC_SUBST|EXEC_USECALC,words2items},
  2021.   {"writefile", EXEC_DIR|EXEC_SUBST,    filewrite},
  2022. };
  2023. int EXEC_FN_NO=(sizeof(exec_routine)/sizeof(exec_routine[0]));
  2024.  
  2025. /* internal: to skip the content of a false if/while. */
  2026. static void _skip_contents(int isif)
  2027. {
  2028.   char buf[MAX_NAMELEN+8], *p1;
  2029.   int i,j,loop;
  2030.   loop=0;
  2031.   while(m_file.linepointer<m_file.linecnt) {
  2032.     j=m_file.linepointer;
  2033.     if((m_file.lines[j].isstart&2)==0) {
  2034.       m_file.linepointer++; continue;
  2035.     }
  2036.     i=m_file.lines[j].execcode;
  2037.     if(i<0) {
  2038.       if(wgetline(buf,MAX_NAMELEN+4,&m_file)==EOF) return;
  2039.       p1=buf+1; if(*p1!='i' && *p1!='e' && *p1!='w') continue;
  2040.       *find_word_end(p1)=0;
  2041.       i=search_list(exec_routine,EXEC_FN_NO,sizeof(exec_routine[0]),p1);
  2042.       if(i>=0) m_file.lines[j].execcode=i;
  2043.     }
  2044.     else m_file.linepointer++;
  2045.     if(i<0) continue;
  2046.     switch(exec_routine[i].tag & 0xffff) {
  2047.       case EXEC_WHILE:
  2048.         if(!isif) loop++;
  2049.         break;
  2050.       case EXEC_IF:
  2051.         if(isif) loop++;
  2052.         break;
  2053.       case EXEC_ELSE: {
  2054.         if(!isif) break;
  2055.         if(loop<=0) return; else break;
  2056.       }
  2057.       case EXEC_ENDIF: {
  2058.         if(!isif) break;
  2059.         if(loop>0) {
  2060.           loop--; break;
  2061.         }
  2062.         else return;
  2063.       }
  2064.       case EXEC_ENDWHILE: {
  2065.         if(isif) break;
  2066.         if(loop>0) {
  2067.           loop--; break;
  2068.         }
  2069.         else return;
  2070.       }
  2071.       default: break;
  2072.     }
  2073.   }
  2074. }
  2075.  
  2076. /* Execute a command defined by !. Returns 0 if OK. */
  2077. void exec_main(char *p)
  2078. {
  2079.   int i,j;
  2080.   char *pp;
  2081.   char tbuf2[MAX_LINELEN+1];
  2082.  
  2083.   pp=find_word_end(p);
  2084.   if(*pp!=0) {
  2085.     *(pp++)=0; pp=find_word_start(pp);
  2086.   }
  2087.   i=m_file.lines[m_file.l].execcode;
  2088.   if(i<0) {
  2089.     i=search_list(exec_routine,EXEC_FN_NO,sizeof(exec_routine[0]),p);
  2090.     m_file.lines[m_file.l].execcode=i;
  2091.   }
  2092.   if(i<0) {
  2093.     setvar(error_data_string,p); module_error("bad_cmd");
  2094.   }
  2095. /* called from !readdef, no right other than set; bail out */
  2096.   execnt++;
  2097.   if((untrust&4)!=0 && (j=(exec_routine[i].tag&0xffff))!=EXEC_SET) {
  2098.     tbuf2[0]=0; exec_exit(tbuf2);
  2099.   }
  2100.   ovlstrcpy(tbuf2,pp); j=exec_routine[i].tag;
  2101.   if(j&EXEC_SUBST) substit(tbuf2);
  2102.   if(j&EXEC_USECALC) {
  2103.     if(!outputing && (j&EXEC_PROCTOO)==0) return;
  2104.     exec_routine[i].routine(tbuf2); if(outputing) output0(tbuf2);
  2105.   }
  2106.   else exec_routine[i].routine(tbuf2);
  2107.   return;
  2108. }
  2109.