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dongpd
2020-10-06 14:27:47 +07:00
commit 586be80cf6
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vendor/yiisoft/yii2/db/sqlite/SqlTokenizer.php vendored Normal file
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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\db\sqlite;
/**
* SqlTokenizer splits SQLite query into individual SQL tokens.
* It's used to obtain a `CHECK` constraint information from a `CREATE TABLE` SQL code.
*
* @see http://www.sqlite.org/draft/tokenreq.html
* @see https://sqlite.org/lang.html
* @author Sergey Makinen <sergey@makinen.ru>
* @since 2.0.13
*/
class SqlTokenizer extends \yii\db\SqlTokenizer
{
/**
* {@inheritdoc}
*/
protected function isWhitespace(&$length)
{
static $whitespaces = [
"\f" => true,
"\n" => true,
"\r" => true,
"\t" => true,
' ' => true,
];
$length = 1;
return isset($whitespaces[$this->substring($length)]);
}
/**
* {@inheritdoc}
*/
protected function isComment(&$length)
{
static $comments = [
'--' => true,
'/*' => true,
];
$length = 2;
if (!isset($comments[$this->substring($length)])) {
return false;
}
if ($this->substring($length) === '--') {
$length = $this->indexAfter("\n") - $this->offset;
} else {
$length = $this->indexAfter('*/') - $this->offset;
}
return true;
}
/**
* {@inheritdoc}
*/
protected function isOperator(&$length, &$content)
{
static $operators = [
'!=',
'%',
'&',
'(',
')',
'*',
'+',
',',
'-',
'.',
'/',
';',
'<',
'<<',
'<=',
'<>',
'=',
'==',
'>',
'>=',
'>>',
'|',
'||',
'~',
];
return $this->startsWithAnyLongest($operators, true, $length);
}
/**
* {@inheritdoc}
*/
protected function isIdentifier(&$length, &$content)
{
static $identifierDelimiters = [
'"' => '"',
'[' => ']',
'`' => '`',
];
if (!isset($identifierDelimiters[$this->substring(1)])) {
return false;
}
$delimiter = $identifierDelimiters[$this->substring(1)];
$offset = $this->offset;
while (true) {
$offset = $this->indexAfter($delimiter, $offset + 1);
if ($delimiter === ']' || $this->substring(1, true, $offset) !== $delimiter) {
break;
}
}
$length = $offset - $this->offset;
$content = $this->substring($length - 2, true, $this->offset + 1);
if ($delimiter !== ']') {
$content = strtr($content, ["$delimiter$delimiter" => $delimiter]);
}
return true;
}
/**
* {@inheritdoc}
*/
protected function isStringLiteral(&$length, &$content)
{
if ($this->substring(1) !== "'") {
return false;
}
$offset = $this->offset;
while (true) {
$offset = $this->indexAfter("'", $offset + 1);
if ($this->substring(1, true, $offset) !== "'") {
break;
}
}
$length = $offset - $this->offset;
$content = strtr($this->substring($length - 2, true, $this->offset + 1), ["''" => "'"]);
return true;
}
/**
* {@inheritdoc}
*/
protected function isKeyword($string, &$content)
{
static $keywords = [
'ABORT' => true,
'ACTION' => true,
'ADD' => true,
'AFTER' => true,
'ALL' => true,
'ALTER' => true,
'ANALYZE' => true,
'AND' => true,
'AS' => true,
'ASC' => true,
'ATTACH' => true,
'AUTOINCREMENT' => true,
'BEFORE' => true,
'BEGIN' => true,
'BETWEEN' => true,
'BY' => true,
'CASCADE' => true,
'CASE' => true,
'CAST' => true,
'CHECK' => true,
'COLLATE' => true,
'COLUMN' => true,
'COMMIT' => true,
'CONFLICT' => true,
'CONSTRAINT' => true,
'CREATE' => true,
'CROSS' => true,
'CURRENT_DATE' => true,
'CURRENT_TIME' => true,
'CURRENT_TIMESTAMP' => true,
'DATABASE' => true,
'DEFAULT' => true,
'DEFERRABLE' => true,
'DEFERRED' => true,
'DELETE' => true,
'DESC' => true,
'DETACH' => true,
'DISTINCT' => true,
'DROP' => true,
'EACH' => true,
'ELSE' => true,
'END' => true,
'ESCAPE' => true,
'EXCEPT' => true,
'EXCLUSIVE' => true,
'EXISTS' => true,
'EXPLAIN' => true,
'FAIL' => true,
'FOR' => true,
'FOREIGN' => true,
'FROM' => true,
'FULL' => true,
'GLOB' => true,
'GROUP' => true,
'HAVING' => true,
'IF' => true,
'IGNORE' => true,
'IMMEDIATE' => true,
'IN' => true,
'INDEX' => true,
'INDEXED' => true,
'INITIALLY' => true,
'INNER' => true,
'INSERT' => true,
'INSTEAD' => true,
'INTERSECT' => true,
'INTO' => true,
'IS' => true,
'ISNULL' => true,
'JOIN' => true,
'KEY' => true,
'LEFT' => true,
'LIKE' => true,
'LIMIT' => true,
'MATCH' => true,
'NATURAL' => true,
'NO' => true,
'NOT' => true,
'NOTNULL' => true,
'NULL' => true,
'OF' => true,
'OFFSET' => true,
'ON' => true,
'OR' => true,
'ORDER' => true,
'OUTER' => true,
'PLAN' => true,
'PRAGMA' => true,
'PRIMARY' => true,
'QUERY' => true,
'RAISE' => true,
'RECURSIVE' => true,
'REFERENCES' => true,
'REGEXP' => true,
'REINDEX' => true,
'RELEASE' => true,
'RENAME' => true,
'REPLACE' => true,
'RESTRICT' => true,
'RIGHT' => true,
'ROLLBACK' => true,
'ROW' => true,
'SAVEPOINT' => true,
'SELECT' => true,
'SET' => true,
'TABLE' => true,
'TEMP' => true,
'TEMPORARY' => true,
'THEN' => true,
'TO' => true,
'TRANSACTION' => true,
'TRIGGER' => true,
'UNION' => true,
'UNIQUE' => true,
'UPDATE' => true,
'USING' => true,
'VACUUM' => true,
'VALUES' => true,
'VIEW' => true,
'VIRTUAL' => true,
'WHEN' => true,
'WHERE' => true,
'WITH' => true,
'WITHOUT' => true,
];
$string = mb_strtoupper($string, 'UTF-8');
if (!isset($keywords[$string])) {
return false;
}
$content = $string;
return true;
}
}