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290 lines
7.4 KiB
290 lines
7.4 KiB
<?php |
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/** |
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* @link http://www.yiiframework.com/ |
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* @copyright Copyright (c) 2008 Yii Software LLC |
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* @license http://www.yiiframework.com/license/ |
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*/ |
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namespace yii\db\sqlite; |
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/** |
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* SqlTokenizer splits SQLite query into individual SQL tokens. |
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* It's used to obtain a `CHECK` constraint information from a `CREATE TABLE` SQL code. |
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* |
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* @see http://www.sqlite.org/draft/tokenreq.html |
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* @see https://sqlite.org/lang.html |
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* @author Sergey Makinen <sergey@makinen.ru> |
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* @since 2.0.13 |
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*/ |
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class SqlTokenizer extends \yii\db\SqlTokenizer |
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{ |
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/** |
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* @inheritDoc |
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*/ |
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protected function isWhitespace(&$length) |
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{ |
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static $whitespaces = [ |
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"\f" => true, |
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"\n" => true, |
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"\r" => true, |
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"\t" => true, |
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' ' => true, |
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]; |
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$length = 1; |
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return isset($whitespaces[$this->substring($length)]); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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protected function isComment(&$length) |
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{ |
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static $comments = [ |
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'--' => true, |
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'/*' => true, |
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]; |
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$length = 2; |
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if (!isset($comments[$this->substring($length)])) { |
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return false; |
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} |
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if ($this->substring($length) === '--') { |
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$length = $this->indexAfter("\n") - $this->offset; |
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} else { |
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$length = $this->indexAfter('*/') - $this->offset; |
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} |
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return true; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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protected function isOperator(&$length, &$content) |
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{ |
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static $operators = [ |
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'!=', |
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'%', |
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'&', |
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'(', |
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')', |
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'*', |
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'+', |
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',', |
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'-', |
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'.', |
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'/', |
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';', |
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'<', |
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'<<', |
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'<=', |
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'<>', |
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'=', |
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'==', |
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'>', |
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'>=', |
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'>>', |
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'|', |
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'||', |
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'~', |
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]; |
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return $this->startsWithAnyLongest($operators, true, $length); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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protected function isIdentifier(&$length, &$content) |
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{ |
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static $identifierDelimiters = [ |
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'"' => '"', |
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'[' => ']', |
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'`' => '`', |
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]; |
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if (!isset($identifierDelimiters[$this->substring(1)])) { |
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return false; |
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} |
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$delimiter = $identifierDelimiters[$this->substring(1)]; |
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$offset = $this->offset; |
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while (true) { |
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$offset = $this->indexAfter($delimiter, $offset + 1); |
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if ($delimiter === ']' || $this->substring(1, true, $offset) !== $delimiter) { |
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break; |
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} |
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} |
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$length = $offset - $this->offset; |
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$content = $this->substring($length - 2, true, $this->offset + 1); |
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if ($delimiter !== ']') { |
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$content = strtr($content, ["$delimiter$delimiter" => $delimiter]); |
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} |
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return true; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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protected function isStringLiteral(&$length, &$content) |
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{ |
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if ($this->substring(1) !== "'") { |
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return false; |
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} |
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$offset = $this->offset; |
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while (true) { |
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$offset = $this->indexAfter("'", $offset + 1); |
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if ($this->substring(1, true, $offset) !== "'") { |
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break; |
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} |
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} |
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$length = $offset - $this->offset; |
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$content = strtr($this->substring($length - 2, true, $this->offset + 1), ["''" => "'"]); |
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return true; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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protected function isKeyword($string, &$content) |
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{ |
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static $keywords = [ |
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'ABORT' => true, |
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'ACTION' => true, |
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'ADD' => true, |
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'AFTER' => true, |
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'ALL' => true, |
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'ALTER' => true, |
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'ANALYZE' => true, |
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'AND' => true, |
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'AS' => true, |
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'ASC' => true, |
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'ATTACH' => true, |
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'AUTOINCREMENT' => true, |
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'BEFORE' => true, |
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'BEGIN' => true, |
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'BETWEEN' => true, |
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'BY' => true, |
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'CASCADE' => true, |
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'CASE' => true, |
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'CAST' => true, |
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'CHECK' => true, |
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'COLLATE' => true, |
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'COLUMN' => true, |
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'COMMIT' => true, |
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'CONFLICT' => true, |
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'CONSTRAINT' => true, |
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'CREATE' => true, |
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'CROSS' => true, |
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'CURRENT_DATE' => true, |
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'CURRENT_TIME' => true, |
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'CURRENT_TIMESTAMP' => true, |
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'DATABASE' => true, |
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'DEFAULT' => true, |
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'DEFERRABLE' => true, |
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'DEFERRED' => true, |
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'DELETE' => true, |
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'DESC' => true, |
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'DETACH' => true, |
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'DISTINCT' => true, |
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'DROP' => true, |
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'EACH' => true, |
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'ELSE' => true, |
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'END' => true, |
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'ESCAPE' => true, |
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'EXCEPT' => true, |
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'EXCLUSIVE' => true, |
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'EXISTS' => true, |
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'EXPLAIN' => true, |
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'FAIL' => true, |
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'FOR' => true, |
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'FOREIGN' => true, |
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'FROM' => true, |
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'FULL' => true, |
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'GLOB' => true, |
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'GROUP' => true, |
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'HAVING' => true, |
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'IF' => true, |
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'IGNORE' => true, |
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'IMMEDIATE' => true, |
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'IN' => true, |
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'INDEX' => true, |
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'INDEXED' => true, |
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'INITIALLY' => true, |
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'INNER' => true, |
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'INSERT' => true, |
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'INSTEAD' => true, |
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'INTERSECT' => true, |
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'INTO' => true, |
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'IS' => true, |
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'ISNULL' => true, |
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'JOIN' => true, |
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'KEY' => true, |
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'LEFT' => true, |
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'LIKE' => true, |
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'LIMIT' => true, |
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'MATCH' => true, |
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'NATURAL' => true, |
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'NO' => true, |
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'NOT' => true, |
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'NOTNULL' => true, |
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'NULL' => true, |
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'OF' => true, |
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'OFFSET' => true, |
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'ON' => true, |
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'OR' => true, |
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'ORDER' => true, |
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'OUTER' => true, |
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'PLAN' => true, |
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'PRAGMA' => true, |
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'PRIMARY' => true, |
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'QUERY' => true, |
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'RAISE' => true, |
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'RECURSIVE' => true, |
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'REFERENCES' => true, |
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'REGEXP' => true, |
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'REINDEX' => true, |
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'RELEASE' => true, |
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'RENAME' => true, |
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'REPLACE' => true, |
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'RESTRICT' => true, |
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'RIGHT' => true, |
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'ROLLBACK' => true, |
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'ROW' => true, |
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'SAVEPOINT' => true, |
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'SELECT' => true, |
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'SET' => true, |
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'TABLE' => true, |
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'TEMP' => true, |
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'TEMPORARY' => true, |
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'THEN' => true, |
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'TO' => true, |
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'TRANSACTION' => true, |
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'TRIGGER' => true, |
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'UNION' => true, |
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'UNIQUE' => true, |
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'UPDATE' => true, |
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'USING' => true, |
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'VACUUM' => true, |
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'VALUES' => true, |
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'VIEW' => true, |
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'VIRTUAL' => true, |
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'WHEN' => true, |
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'WHERE' => true, |
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'WITH' => true, |
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'WITHOUT' => true, |
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]; |
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$string = mb_strtoupper($string, 'UTF-8'); |
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if (!isset($keywords[$string])) { |
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return false; |
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} |
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$content = $string; |
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return true; |
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} |
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}
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