1 files changed, 129 insertions, 0 deletions

diff --git a/vendor/doctrine/dbal/src/SQL/Parser.php b/vendor/doctrine/dbal/src/SQL/Parser.php
new file mode 100644
index 0000000..ad30f09
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+++ b/vendor/doctrine/dbal/src/SQL/Parser.php
@@ -0,0 +1,129 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\DBAL\SQL;
+
+use Doctrine\DBAL\SQL\Parser\Exception;
+use Doctrine\DBAL\SQL\Parser\Exception\RegularExpressionError;
+use Doctrine\DBAL\SQL\Parser\Visitor;
+
+use function array_merge;
+use function assert;
+use function current;
+use function implode;
+use function key;
+use function next;
+use function preg_last_error;
+use function preg_match;
+use function reset;
+use function sprintf;
+use function strlen;
+
+use const PREG_NO_ERROR;
+
+/**
+ * The SQL parser that focuses on identifying prepared statement parameters. It implements parsing other tokens like
+ * string literals and comments only as a way to not confuse their contents with the the parameter placeholders.
+ *
+ * The parsing logic and the implementation is inspired by the PHP PDO parser.
+ *
+ * @internal
+ *
+ * @see https://github.com/php/php-src/blob/php-7.4.12/ext/pdo/pdo_sql_parser.re#L49-L69
+ */
+final class Parser
+{
+    private const SPECIAL_CHARS = ':\?\'"`\\[\\-\\/';
+
+    private const BACKTICK_IDENTIFIER  = '`[^`]*`';
+    private const BRACKET_IDENTIFIER   = '(?<!\b(?i:ARRAY))\[(?:[^\]])*\]';
+    private const MULTICHAR            = ':{2,}';
+    private const NAMED_PARAMETER      = ':[a-zA-Z0-9_]+';
+    private const POSITIONAL_PARAMETER = '(?<!\\?)\\?(?!\\?)';
+    private const ONE_LINE_COMMENT     = '--[^\r\n]*';
+    private const MULTI_LINE_COMMENT   = '/\*([^*]+|\*+[^/*])*\**\*/';
+    private const SPECIAL              = '[' . self::SPECIAL_CHARS . ']';
+    private const OTHER                = '[^' . self::SPECIAL_CHARS . ']+';
+
+    private readonly string $sqlPattern;
+
+    public function __construct(bool $mySQLStringEscaping)
+    {
+        if ($mySQLStringEscaping) {
+            $patterns = [
+                $this->getMySQLStringLiteralPattern("'"),
+                $this->getMySQLStringLiteralPattern('"'),
+            ];
+        } else {
+            $patterns = [
+                $this->getAnsiSQLStringLiteralPattern("'"),
+                $this->getAnsiSQLStringLiteralPattern('"'),
+            ];
+        }
+
+        $patterns = array_merge($patterns, [
+            self::BACKTICK_IDENTIFIER,
+            self::BRACKET_IDENTIFIER,
+            self::MULTICHAR,
+            self::ONE_LINE_COMMENT,
+            self::MULTI_LINE_COMMENT,
+            self::OTHER,
+        ]);
+
+        $this->sqlPattern = sprintf('(%s)', implode('|', $patterns));
+    }
+
+    /**
+     * Parses the given SQL statement
+     *
+     * @throws Exception
+     */
+    public function parse(string $sql, Visitor $visitor): void
+    {
+        /** @var array<string,callable> $patterns */
+        $patterns = [
+            self::NAMED_PARAMETER => static function (string $sql) use ($visitor): void {
+                $visitor->acceptNamedParameter($sql);
+            },
+            self::POSITIONAL_PARAMETER => static function (string $sql) use ($visitor): void {
+                $visitor->acceptPositionalParameter($sql);
+            },
+            $this->sqlPattern => static function (string $sql) use ($visitor): void {
+                $visitor->acceptOther($sql);
+            },
+            self::SPECIAL => static function (string $sql) use ($visitor): void {
+                $visitor->acceptOther($sql);
+            },
+        ];
+
+        $offset = 0;
+
+        while (($handler = current($patterns)) !== false) {
+            if (preg_match('~\G' . key($patterns) . '~s', $sql, $matches, 0, $offset) === 1) {
+                $handler($matches[0]);
+                reset($patterns);
+
+                $offset += strlen($matches[0]);
+            } elseif (preg_last_error() !== PREG_NO_ERROR) {
+                // @codeCoverageIgnoreStart
+                throw RegularExpressionError::new();
+                // @codeCoverageIgnoreEnd
+            } else {
+                next($patterns);
+            }
+        }
+
+        assert($offset === strlen($sql));
+    }
+
+    private function getMySQLStringLiteralPattern(string $delimiter): string
+    {
+        return $delimiter . '((\\\\.)|(?![' . $delimiter . '\\\\]).)*' . $delimiter;
+    }
+
+    private function getAnsiSQLStringLiteralPattern(string $delimiter): string
+    {
+        return $delimiter . '[^' . $delimiter . ']*' . $delimiter;
+    }
+}