Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 109 insertions, 0 deletions

diff --git a/connectivity/source/inc/RowFunctionParser.hxx b/connectivity/source/inc/RowFunctionParser.hxx
new file mode 100644
index 000000000..059544e51
--- /dev/null
+++ b/connectivity/source/inc/RowFunctionParser.hxx
@@ -0,0 +1,109 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+#include "FDatabaseMetaDataResultSet.hxx"
+#include <connectivity/dbtoolsdllapi.hxx>
+#include <memory>
+
+namespace connectivity
+{
+enum class ExpressionFunct
+{
+    Equation,
+    And,
+    Or
+};
+
+#define EXPRESSION_FLAG_SUMANGLE_MODE 1
+
+class OOO_DLLPUBLIC_DBTOOLS SAL_NO_VTABLE ExpressionNode
+{
+public:
+    virtual ~ExpressionNode() {}
+
+    /** Operator to calculate function value.
+
+        This method calculates the function value.
+    */
+    virtual ORowSetValueDecoratorRef
+    evaluate(const ODatabaseMetaDataResultSet::ORow& _aRow) const = 0;
+
+    virtual void fill(const ODatabaseMetaDataResultSet::ORow& _aRow) const = 0;
+};
+
+/** This exception is thrown, when the arithmetic expression
+    parser failed to parse a string.
+    */
+struct OOO_DLLPUBLIC_DBTOOLS ParseError
+{
+    ParseError(const char*) {}
+};
+
+class FunctionParser
+{
+public:
+    /** Parse a string
+
+        The following grammar is accepted by this method:
+        <code>
+
+        number_digit = '0'|'1'|'2'|'3'|'4'|'5'|'6'|'7'|'8'|'9'
+
+        number = number number_digit | number_digit
+
+        equal_function = '='
+        ternary_function = 'if'
+
+        string_reference = 'a-z,A-Z,0-9' ' '
+        modifier_reference = '$' '0-9' ' '
+
+        basic_expression =
+            number |
+            string_reference |
+            additive_expression equal_function additive_expression |
+            unary_function '(' number_digit ')'
+            ternary_function '(' additive_expression ',' additive_expression ',
+                               ' additive_expression ')' | '(' additive_expression ')'
+
+        </code>
+
+        @param rFunction
+        The string to parse
+
+        @throws ParseError if an invalid expression is given.
+
+        @return the generated function object.
+       */
+
+    static std::shared_ptr<ExpressionNode> const& parseFunction(const OUString& _sFunction);
+
+private:
+    // disabled constructor/destructor, since this is
+    // supposed to be a singleton
+    FunctionParser() = delete;
+    FunctionParser(const FunctionParser&) = delete;
+    FunctionParser& operator=(const FunctionParser&) = delete;
+};
+
+} // namespace connectivity
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */