project/Nokia61/Nokia61.php

   1 <?php
   2         error_reporting(E_ALL);
   3
   4         if (!isset($HTTP_GET_VARS["nohtml"])) {
   5         ?>
   6 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
   7 <HTML>
   8 <HEAD>
   9 <TITLE>Nokia61</TITLE>
  10 <LINK REV=MADE HREF="mailto:short@ucw.cz">
  11 </HEAD><BODY>
  12         <?php
  13                 }
  14
  15 $tables_per_row=4;
  16 $bgcolor_head="#D0D0D0";
  17 $bgcolor_body="#F0F0F0";
  18
  19 function table($array,$rw=0)
  20 {
  21 global $tables,$bgcolor_head,$bgcolor_body,$HTTP_GET_VARS;
  22
  23         print "<FORM METHOD=GET ACTION=\""
  24                         .(!isset($HTTP_GET_VARS["base"]) ? "./" : $HTTP_GET_VARS["base"])
  25                         ."Nokia61.php\"><TABLE BORDER=1 RULES=NONE>\n";
  26         print "<TR><TD COLSPAN=3 BGCOLOR=\"".$bgcolor_head."\">";
  27         if ($rw)
  28                 print "Input:";
  29         else
  30                 printf("Step #%d",$tables+1);
  31         print "</TD></TR>\n";
  32         for ($row=0;$row<3;$row++) {
  33                 print "<TR>";
  34                 for ($col=0;$col<3;$col++) {
  35                         $idx=$row*3+$col;
  36                         printf("<TD BGCOLOR=\"".$bgcolor_body."\"><INPUT NAME=\"%d\"",$idx);
  37                         if (isset($array[$idx]))
  38                                 printf(" VALUE=\"%d\"",$array[$idx]);
  39                         if (!$rw)
  40                                 print " READONLY";
  41                         print " TYPE=STRING SIZE=2 MAXLENGTH=2></TD>";
  42                         }
  43                 print "</TR>\n";
  44                 }
  45         if ($rw)
  46                 print "<TR><TD COLSPAN=3 ALIGN=CENTER><INPUT TYPE=SUBMIT VALUE=\"Solve!\"></TD></TR>\n";
  47         print "</TABLE></FORM>\n";
  48         $tables++;
  49 }
  50
  51         $input=array();
  52         $used=array();
  53         $filled=0;
  54         $tables=0;
  55
  56         for ($idx=0;$idx<9;$idx++) {
  57                 $s=$HTTP_GET_VARS[sprintf("%d",$idx)];
  58                 if (!strlen($s))
  59                         continue;
  60                 $x=ord($s)-ord("0");
  61                 if (strlen($s)!=1 || $x<1 || $x>9 || isset($used[$x])) {
  62                         printf("<H1>WARNING: Digit at row %d, column %d was %s, erased!</H1>\n",1+$idx/3,1+$idx%3,
  63                                         ($used[$x] ? "repeated" : "invalid"));
  64                         continue;
  65                         }
  66                 $input[$idx]=$x;
  67                 $used[$x]=1;
  68                 $filled++;
  69                 }
  70         // Both popen() and proc_open() require: /bin/sh
  71         if ($filled==9 && !is_executable("/bin/sh")) {
  72                 print "<h1>Current installation environment forbids the execution!</h1>\n";
  73                 $filled=0;
  74                 }
  75         if ($filled==9) {
  76                 print "<TABLE BORDER=0><TR>";
  77                 $cmd="echo -n -e '";
  78                 for ($row=0;$row<3;$row++) {
  79                         for ($col=0;$col<3;$col++) {
  80                                 if ($col)
  81                                         $cmd.=" ";
  82                                 $cmd.=sprintf("%d",$input[$row*3+$col]);
  83                                 }
  84                         $cmd.="\\n";
  85                         }
  86                 $cmd.="' | ./Nokia61";
  87                 $cmd=popen($cmd,"r");
  88                 $idx=0;
  89                 $output=array();
  90                 while (!feof($cmd)) {
  91                         if (3!=fscanf($cmd,"\n  %d%d%d",$output[$idx+0],$output[$idx+1],$output[$idx+2]))
  92                                 continue;
  93                         $idx+=3;
  94                         if ($idx<9)
  95                                 continue;
  96                         print "<TD>";
  97                         table($output);
  98                         print "</TD><TD>&nbsp;</TD>";
  99                         if (!($tables%$tables_per_row))
 100                                 print "</TR><TR>";
 101                         $idx=0;
 102                         }
 103                 pclose($cmd);
 104                 print "</TR></TABLE>\n";
 105                 print "<HR>\n";
 106                 $input=array();
 107                 }
 108         table($input,1);
 109
 110         if (!isset($HTTP_GET_VARS["nohtml"])) {
 111         ?>
 112 </BODY></HTML>
 113 <?php
 114                 }
 115 ?>