private function generateAnswer($vArray)
{
if ($vArray['substitute_attr']['val'] == "ans") {
//We're substituting ONLY the answer. There is no need to recompile the program
$vToReturn = $this->substitutePercentages($vArray['substitute']);
if (strstr($vToReturn, ";") == false) {
$vToReturn = "return " . $vToReturn . ";";
}
return eval($vToReturn);
}
//Ok. Looks like we're going to have to recompile the program with some new values. This could get interesting.
//Due to the way this shitty XML parser works, we have to do some basic checks. If there's more than one "substitute" key in the answer
// the parser puts it into an array, otherwise it doesn't
$vToProcess = array();
if (is_array($vArray['substitute'])) {
for ($i = 0; $i < sizeof($vArray['substitute']) / 2; $i++) {
$vToProcess[] = array("attr" => $vArray['substitute'][$i . "_attr"]['val'], "code" => $vArray['substitute'][$i]);
}
} else {
$vToProcess[] = array("attr" => $vArray['substitute_attr']['val'], "code" => $vArray['substitute']);
}
//OK. So now we do a whole NEW set of substitutions for this fake answer.
//We'll start by copying over the REAL substitutions and replacing them as we go with fake ones
//From here on in, this function will look a lot like populateSubstitutions
$this->mSubstitutions_tmp = $this->mSubstitutions;
foreach ($vToProcess as $vTP) {
$toGen = $vTP['code'];
if (strstr($toGen, ";") == false) {
//Assuming its just a function without ; and return
$toGen = "return " . $toGen . ";";
}
$toGen = $this->substitutePercentages($toGen);
//echo "TOGEN: " . $toGen;
$this->mSubstitutions_tmp[$vTP['attr']] = eval($toGen);
}
//Ok. All the new 'fake' substitutions are done. Time to generate the entire new 'fake' problem!
$this->mProblem_tmp = $this->mFileContents['question']['problem'];
//Replace what needs to be replaced
foreach ($this->mSubstitutions_tmp as $mSubKey => $mSub) {
$this->mProblem_tmp = str_replace("`" . $mSubKey . "`", $mSub, $this->mProblem_tmp);
}
//Now compile this fake problem into a fake solution and return the output
return Model_Shell_Compiler::compileAndReturn(rand(1, 99999) . "_fake", $this->mProblem_tmp);
}
/**
* C++ Specific Compilation
*
* @param string $mTempFolder
* @param string $vFilePrefix
* @param string $mSource
* @return string
* @author Ben Evans
*/
protected static function cpp_compile_and_return($mTempFolder, $vFilePrefix, $mSource)
{
if (in_array(strtolower(PHP_OS), explode(",", self::NIX_OSES))) {
// Linux, Mac etc
if (file_exists(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix . ".cpp"))) {
unlink(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix . ".cpp"));
}
if (file_exists(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix))) {
unlink(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix));
}
$fh = fopen(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix . ".cpp"), 'w');
fwrite($fh, $mSource);
fclose($fh);
$toExec = "g++ \"" . $mTempFolder . "/" . $vFilePrefix . ".cpp\" -o \"" . $mTempFolder . "/" . $vFilePrefix . "\"";
//echo "EXECUTING: " . $toExec;
$execResult = exec($toExec);
die;
//Now make sure it compiled
if (file_exists("{$mTempFolder}/" . $vFilePrefix)) {
$toExec = "timeout 5 \"" . $mTempFolder . "/" . $vFilePrefix . "\" > \"" . $mTempFolder . "/" . $vFilePrefix . ".txt\"";
//echo "EXECUTING: " . $toExec;
exec($toExec);
$vContents = file_get_contents("{$mTempFolder}/" . $vFilePrefix . ".txt");
//Delete all the stuff we made
unlink("{$mTempFolder}/" . $vFilePrefix . ".cpp");
unlink("{$mTempFolder}/" . $vFilePrefix);
unlink("{$mTempFolder}/" . $vFilePrefix . ".txt");
return $vContents;
} else {
return "Compilation failed! Reason:" . $execResult;
}
} else {
//We're running Windows (probably)
if (file_exists("{$mTempFolder}/" . $vFilePrefix . ".cpp")) {
unlink(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix . ".cpp"));
}
if (file_exists("{$mTempFolder}/" . $vFilePrefix . ".exe")) {
unlink(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix . ".exe"));
}
$fh = fopen(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix . ".cpp"), 'w');
fwrite($fh, $mSource);
fclose($fh);
$toExec = "C:\\mingw\\bin\\g++.exe \"" . $mTempFolder . "\\" . $vFilePrefix . ".cpp\" -o \"" . $mTempFolder . "\\" . $vFilePrefix . ".exe\" ";
echo $toExec;
$execResult = exec($toExec);
if (file_exists("{$mTempFolder}/" . $vFilePrefix . ".exe")) {
$toExec = "\"" . $mTempFolder . "\\" . $vFilePrefix . ".exe\" > \"" . $mTempFolder . "\\" . $vFilePrefix . ".txt\"";
$fh = fopen("{$mTempFolder}/" . $vFilePrefix . ".bat", 'w');
fwrite($fh, $toExec);
fclose($fh);
$toExec = '"' . $mTempFolder . "\\limitexec.exe\" 5 " . $vFilePrefix;
//echo "EXECUTING: " . $toExec;
exec($toExec);
$vContents = file_get_contents(Model_Shell_Compiler::os_slash("{$mTempFolder}/" . $vFilePrefix . ".txt"));
//Delete all the stuff we made
unlink("{$mTempFolder}/" . $vFilePrefix . ".cpp");
unlink("{$mTempFolder}/" . $vFilePrefix . ".bat");
unlink("{$mTempFolder}/" . $vFilePrefix . ".exe");
unlink("{$mTempFolder}/" . $vFilePrefix . ".txt");
return $vContents;
} else {
return "Compilation failed! Reason:" . $execResult;
}
}
//End Windows-specific code
}
