mirror of
https://github.com/ezyang/htmlpurifier.git
synced 2025-01-10 07:51:52 +00:00
91 lines
2.7 KiB
PHP
Executable File
91 lines
2.7 KiB
PHP
Executable File
#!/usr/bin/php
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<?php
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chdir(dirname(__FILE__));
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require_once 'common.php';
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assertCli();
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/**
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* @file
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* Parses *.ent files into an entity lookup table, and then serializes and
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* writes the whole kaboodle to a file. The resulting file is cached so
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* that this script does not need to be run. This script should rarely,
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* if ever, be run, since HTML's entities are fairly immutable.
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*/
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// here's where the entity files are located, assuming working directory
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// is the same as the location of this PHP file. Needs trailing slash.
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$entity_dir = '../docs/entities/';
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// defines the output file for the serialized content.
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$output_file = '../library/HTMLPurifier/EntityLookup/entities.ser';
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// courtesy of a PHP manual comment
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function unichr($dec)
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{
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if ($dec < 128) {
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$utf = chr($dec);
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} elseif ($dec < 2048) {
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$utf = chr(192 + (($dec - ($dec % 64)) / 64));
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$utf .= chr(128 + ($dec % 64));
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} else {
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$utf = chr(224 + (($dec - ($dec % 4096)) / 4096));
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$utf .= chr(128 + ((($dec % 4096) - ($dec % 64)) / 64));
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$utf .= chr(128 + ($dec % 64));
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}
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return $utf;
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}
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if ( !is_dir($entity_dir) ) exit("Fatal Error: Can't find entity directory.\n");
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if ( file_exists($output_file) ) exit("Fatal Error: output file already exists.\n");
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$dh = @opendir($entity_dir);
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if ( !$dh ) exit("Fatal Error: Cannot read entity directory.\n");
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$entity_files = array();
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while (($file = readdir($dh)) !== false) {
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if (@$file[0] === '.') continue;
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if (substr(strrchr($file, "."), 1) !== 'ent') continue;
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$entity_files[] = $file;
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}
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closedir($dh);
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if ( !$entity_files ) exit("Fatal Error: No entity files to parse.\n");
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$entity_table = array();
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//$regexp = '/<!ENTITY\s+([A-Za-z0-9]+)\s+"&#(?:38;#)?([0-9]+);">/';
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$regexp = '/<!ENTITY\s+([A-Za-z0-9]+)\s+"(.*)"\s*>/';
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$regexp_inner = '/&#(?:38;#)?(x?[A-Fa-f0-9]+);/';
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foreach ( $entity_files as $file ) {
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$contents = file_get_contents($entity_dir . $file);
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// First we match each <!ENTITY name "definition"> tag
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$matches = array();
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preg_match_all($regexp, $contents, $matches, PREG_SET_ORDER);
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foreach ($matches as $match) {
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//$entity_table[$match[1]] = unichr($match[2]);
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// Then, for each tag, we match and parse each character in the definition string
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$matches_inner = array();
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preg_match_all($regexp_inner, $match[2], $matches_inner, PREG_SET_ORDER);
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$entity_table[$match[1]] = '';
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foreach ($matches_inner as $match_inner) {
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$entity_table[$match[1]] .= unichr(intval(str_replace('x', '0x', $match_inner[1]), 0));
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}
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}
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}
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$output = serialize($entity_table);
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$fh = fopen($output_file, 'w');
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fwrite($fh, $output);
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fclose($fh);
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echo "Completed successfully.";
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// vim: et sw=4 sts=4
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