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ValidColor.php
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executable file
·116 lines (99 loc) · 3.08 KB
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<?php defined('SYSPATH') or die('No direct access allowed.');
/**
* @package Kohana/Codebench
* @category Tests
* @author Geert De Deckere <geert@idoe.be>
*/
class Bench_ValidColor extends Codebench {
public $description =
'Optimization for <code>Validate::color()</code>.
See: http://forum.kohanaphp.com/comments.php?DiscussionID=2192.
Note that the methods with an <em>_invalid</em> suffix contain flawed regexes and should be
completely discarded. I left them in here for educational purposes, and to remind myself
to think harder and test more thoroughly. It can\'t be that I only found out so late in
the game. For the regex explanation have a look at the forum topic mentioned earlier.';
public $loops = 10000;
public $subjects = array
(
// Valid colors
'aaA',
'123',
'000000',
'#123456',
'#abcdef',
// Invalid colors
'ggg',
'1234',
'#1234567',
"#000\n",
'}§è!çà%$z',
);
// Note that I added the D modifier to corey's regexes. We need to match exactly
// the same if we want the benchmarks to be of any value.
public function bench_corey_regex_1_invalid($subject)
{
return (bool) preg_match('/^#?([0-9a-f]{1,2}){3}$/iD', $subject);
}
public function bench_corey_regex_2($subject)
{
return (bool) preg_match('/^#?([0-9a-f]){3}(([0-9a-f]){3})?$/iD', $subject);
}
// Optimized corey_regex_1
// Using non-capturing parentheses and a possessive interval
public function bench_geert_regex_1a_invalid($subject)
{
return (bool) preg_match('/^#?(?:[0-9a-f]{1,2}+){3}$/iD', $subject);
}
// Optimized corey_regex_2
// Removed useless parentheses, made the remaining ones non-capturing
public function bench_geert_regex_2a($subject)
{
return (bool) preg_match('/^#?[0-9a-f]{3}(?:[0-9a-f]{3})?$/iD', $subject);
}
// Optimized geert_regex_1a
// Possessive "#"
public function bench_geert_regex_1b_invalid($subject)
{
return (bool) preg_match('/^#?+(?:[0-9a-f]{1,2}+){3}$/iD', $subject);
}
// Optimized geert_regex_2a
// Possessive "#"
public function bench_geert_regex_2b($subject)
{
return (bool) preg_match('/^#?+[0-9a-f]{3}(?:[0-9a-f]{3})?$/iD', $subject);
}
// Using \z instead of $
public function bench_salathe_regex_1($subject)
{
return (bool) preg_match('/^#?+[0-9a-f]{3}(?:[0-9a-f]{3})?\z/i', $subject);
}
// Using \A instead of ^
public function bench_salathe_regex_2($subject)
{
return (bool) preg_match('/\A#?+[0-9a-f]{3}(?:[0-9a-f]{3})?\z/i', $subject);
}
// A solution without regex
public function bench_geert_str($subject)
{
if ($subject[0] === '#')
{
$subject = substr($subject, 1);
}
$strlen = strlen($subject);
return (($strlen === 3 OR $strlen === 6) AND ctype_xdigit($subject));
}
// An ugly, but fast, solution without regex
public function bench_salathe_str($subject)
{
if ($subject[0] === '#')
{
$subject = substr($subject, 1);
}
// TRUE if:
// 1. $subject is 6 or 3 chars long
// 2. $subject contains only hexadecimal digits
return (((isset($subject[5]) AND ! isset($subject[6])) OR
(isset($subject[2]) AND ! isset($subject[3])))
AND ctype_xdigit($subject));
}
}