tor-android/external/badvpn_dns/lime/flex_token_stream.php

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PHP
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2015-01-25 11:08:34 +00:00
<?php
abstract class flex_scanner {
/*
Let's face it: PHP is not up to lexical processing. GNU flex handles
it well, so I've created a little protocol for delegating the work.
Extend this class so that executable() gives a path to your lexical
analyser program.
*/
abstract function executable();
function __construct($path) {
if (!is_readable($path)) throw new Exception("$path is not readable.");
putenv("PHP_LIME_SCAN_STDIN=$path");
$scanner = $this->executable();
$tokens = explode("\0", `$scanner < "\$PHP_LIME_SCAN_STDIN"`);
array_pop($tokens);
$this->tokens = $tokens;
$this->lineno = 1;
}
function next() {
if (list($key, $token) = each($this->tokens)) {
list($this->lineno, $type, $text) = explode("\1", $token);
return array($type, $text);
}
}
function feed($parser) {
while (list($type, $text) = $this->next()) {
$parser->eat($type, $text);
}
return $parser->eat_eof();
}
}