init web ems all

2024-09-27 17:13:36 +08:00
parent 81c97acbe9
commit 5cc56f8078
4263 changed files with 798779 additions and 0 deletions
--- a/phpMyAdmin/vendor/phpmyadmin/sql-parser/src/Statements/LockStatement.php
+++ b/phpMyAdmin/vendor/phpmyadmin/sql-parser/src/Statements/LockStatement.php
@@ -0,0 +1,128 @@
+<?php
+
+/**
+ * `LOCK` statement.
+ */
+
+namespace PhpMyAdmin\SqlParser\Statements;
+
+use PhpMyAdmin\SqlParser\Components\LockExpression;
+use PhpMyAdmin\SqlParser\Parser;
+use PhpMyAdmin\SqlParser\Statement;
+use PhpMyAdmin\SqlParser\Token;
+use PhpMyAdmin\SqlParser\TokensList;
+
+/**
+ * `LOCK` statement.
+ *
+ * @category   Statements
+ *
+ * @license    https://www.gnu.org/licenses/gpl-2.0.txt GPL-2.0+
+ */
+class LockStatement extends Statement
+{
+    /**
+     * Tables with their Lock expressions.
+     *
+     * @var LockExpression[]
+     */
+    public $locked = array();
+
+    /**
+     * Whether it's a LOCK statement
+     * if false, it's an UNLOCK statement
+     */
+    public $isLock = true;
+
+    /**
+     * @param Parser     $parser the instance that requests parsing
+     * @param TokensList $list   the list of tokens to be parsed
+     */
+    public function parse(Parser $parser, TokensList $list)
+    {
+        if ($list->tokens[$list->idx]->value === 'UNLOCK') {
+            // this is in fact an UNLOCK statement
+            $this->isLock = false;
+        }
+        ++$list->idx; // Skipping `LOCK`.
+
+        /**
+         * The state of the parser.
+         *
+         * Below are the states of the parser.
+         *
+         *      0 ---------------- [ TABLES ] -----------------> 1
+         *      1 -------------- [ lock_expr ] ----------------> 2
+         *      2 ------------------ [ , ] --------------------> 1
+         *
+         * @var int
+         */
+        $state = 0;
+
+        /**
+         * Previous parsed token
+         */
+        $prevToken = null;
+
+        for (; $list->idx < $list->count; ++$list->idx) {
+            /**
+             * Token parsed at this moment.
+             *
+             * @var Token
+             */
+            $token = $list->tokens[$list->idx];
+
+            // End of statement.
+            if ($token->type === Token::TYPE_DELIMITER) {
+                break;
+            }
+
+            // Skipping whitespaces and comments.
+            if (($token->type === Token::TYPE_WHITESPACE) || ($token->type === Token::TYPE_COMMENT)) {
+                continue;
+            }
+
+            if ($state === 0) {
+                if ($token->type === Token::TYPE_KEYWORD) {
+                    if ($token->keyword !== 'TABLES') {
+                        $parser->error('Unexpected keyword.', $token);
+                        break;
+                    }
+                    $state = 1;
+                    continue;
+                } else {
+                    $parser->error('Unexpected token.', $token);
+                    break;
+                }
+            } elseif ($state === 1) {
+                if (! $this->isLock) {
+                    // UNLOCK statement should not have any more tokens
+                    $parser->error('Unexpected token.', $token);
+                    break;
+                }
+                $this->locked[] = LockExpression::parse($parser, $list);
+                $state = 2;
+            } elseif ($state === 2) {
+                if ($token->value === ',') {
+                    // move over to parsing next lock expression
+                    $state = 1;
+                }
+            }
+
+            $prevToken = $token;
+        }
+
+        if ($state !== 2 && $prevToken != null) {
+            $parser->error('Unexpected end of LOCK statement.', $prevToken);
+        }
+    }
+
+    /**
+     * @return string
+     */
+    public function build()
+    {
+        return trim(($this->isLock ? 'LOCK' : 'UNLOCK')
+            . ' TABLES ' . LockExpression::build($this->locked));
+    }
+}