forked from GNUsocial/gnu-social
96 lines
3.1 KiB
PHP
96 lines
3.1 KiB
PHP
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<?php
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const GRAMMAR_FILE = './zend_language_parser.phpy';
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const LIB = '(?(DEFINE)
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(?<singleQuotedString>\'[^\\\\\']*+(?:\\\\.[^\\\\\']*+)*+\')
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(?<doubleQuotedString>"[^\\\\"]*+(?:\\\\.[^\\\\"]*+)*+")
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(?<string>(?&singleQuotedString)|(?&doubleQuotedString))
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(?<comment>/\*[^*]*+(?:\*(?!/)[^*]*+)*+\*/)
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(?<code>\{[^\'"/{}]*+(?:(?:(?&string)|(?&comment)|(?&code)|/)[^\'"/{}]*+)*+})
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)';
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const RULE_BLOCK = '(?<name>[a-z_]++):(?<rules>[^\'"/{};]*+(?:(?:(?&string)|(?&comment)|(?&code)|/|})[^\'"/{};]*+)*+);';
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$usedTerminals = array_flip(array(
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'T_VARIABLE', 'T_STRING', 'T_INLINE_HTML', 'T_ENCAPSED_AND_WHITESPACE',
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'T_LNUMBER', 'T_DNUMBER', 'T_CONSTANT_ENCAPSED_STRING', 'T_STRING_VARNAME', 'T_NUM_STRING'
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));
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$unusedNonterminals = array_flip(array(
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'case_separator', 'optional_comma'
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));
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function regex($regex) {
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return '~' . LIB . '(?:' . str_replace('~', '\~', $regex) . ')~';
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}
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function magicSplit($regex, $string) {
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$pieces = preg_split(regex('(?:(?&string)|(?&comment)|(?&code))(*SKIP)(*FAIL)|' . $regex), $string);
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foreach ($pieces as &$piece) {
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$piece = trim($piece);
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}
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return array_filter($pieces);
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}
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echo '<pre>';
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////////////////////
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////////////////////
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////////////////////
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list($defs, $ruleBlocks) = magicSplit('%%', file_get_contents(GRAMMAR_FILE));
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if ('' !== trim(preg_replace(regex(RULE_BLOCK), '', $ruleBlocks))) {
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die('Not all rule blocks were properly recognized!');
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}
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preg_match_all(regex(RULE_BLOCK), $ruleBlocks, $ruleBlocksMatches, PREG_SET_ORDER);
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foreach ($ruleBlocksMatches as $match) {
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$ruleBlockName = $match['name'];
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$rules = magicSplit('\|', $match['rules']);
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foreach ($rules as &$rule) {
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$parts = magicSplit('\s+', $rule);
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$usedParts = array();
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foreach ($parts as $part) {
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if ('{' === $part[0]) {
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preg_match_all('~\$([0-9]+)~', $part, $backReferencesMatches, PREG_SET_ORDER);
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foreach ($backReferencesMatches as $match) {
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$usedParts[$match[1]] = true;
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}
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}
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}
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$i = 1;
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foreach ($parts as &$part) {
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if ('/' === $part[0]) {
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continue;
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}
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if (isset($usedParts[$i])) {
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if ('\'' === $part[0] || '{' === $part[0]
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|| (ctype_upper($part[0]) && !isset($usedTerminals[$part]))
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|| (ctype_lower($part[0]) && isset($unusedNonterminals[$part]))
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) {
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$part = '<span style="background-color: red; color: white;">' . $part . '</span>';
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} else {
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$part = '<strong><em>' . $part . '</em></strong>';
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}
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} elseif ((ctype_upper($part[0]) && isset($usedTerminals[$part]))
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|| (ctype_lower($part[0]) && !isset($unusedNonterminals[$part]))
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) {
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$part = '<span style="background-color: blue; color: white;">' . $part . '</span>';
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}
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++$i;
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}
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$rule = implode(' ', $parts);
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}
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echo $ruleBlockName, ':', "\n", ' ', implode("\n" . ' | ', $rules), "\n", ';', "\n\n";
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}
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