From ed5640d8b587fbcfed7dd7967f3de04b37a76f26 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 11:06:44 +0200
Subject: Adding upstream version 4:7.4.7.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 vcl/win/dtrans/TxtCnvtHlp.cxx | 125 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 vcl/win/dtrans/TxtCnvtHlp.cxx

(limited to 'vcl/win/dtrans/TxtCnvtHlp.cxx')

diff --git a/vcl/win/dtrans/TxtCnvtHlp.cxx b/vcl/win/dtrans/TxtCnvtHlp.cxx
new file mode 100644
index 000000000..d7ab386fc
--- /dev/null
+++ b/vcl/win/dtrans/TxtCnvtHlp.cxx
@@ -0,0 +1,125 @@
+/* -*- 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 .
+ */
+
+#include <osl/diagnose.h>
+
+#include "TxtCnvtHlp.hxx"
+#include "DTransHelper.hxx"
+#include "ImplHelper.hxx"
+
+using namespace ::com::sun::star::datatransfer;
+using namespace ::com::sun::star::uno;
+
+// assuming a '\0' terminated string if no length specified
+
+static int CalcBuffSizeForTextConversion( UINT code_page, LPCSTR lpMultiByteString, int nLen = -1 )
+{
+    return ( MultiByteToWideChar( code_page,
+                                0,
+                                lpMultiByteString,
+                                nLen,
+                                nullptr,
+                                0 ) * sizeof( sal_Unicode ) );
+}
+
+// assuming a '\0' terminated string if no length specified
+
+static int CalcBuffSizeForTextConversion( UINT code_page, LPCWSTR lpWideCharString, int nLen = -1 )
+{
+    return WideCharToMultiByte( code_page,
+                                0,
+                                lpWideCharString,
+                                nLen,
+                                nullptr,
+                                0,
+                                nullptr,
+                                nullptr );
+}
+
+// converts text in one code page into unicode text
+// automatically calculates the necessary buffer size and allocates
+// the buffer
+
+int MultiByteToWideCharEx( UINT cp_src,
+                           LPCSTR lpMultiByteString,
+                           int lenStr,
+                           CStgTransferHelper& refDTransHelper,
+                           BOOL bEnsureTrailingZero )
+{
+    OSL_ASSERT( IsValidCodePage( cp_src ) );
+    OSL_ASSERT( nullptr != lpMultiByteString );
+
+    // calculate the required buff size
+    int reqSize = CalcBuffSizeForTextConversion( cp_src, lpMultiByteString, lenStr );
+
+    if ( bEnsureTrailingZero )
+        reqSize += sizeof( sal_Unicode );
+
+    // initialize the data-transfer helper
+    refDTransHelper.init( reqSize );
+
+    // setup a global memory pointer
+    CRawHGlobalPtr ptrHGlob( refDTransHelper );
+
+    // do the conversion and return
+    return MultiByteToWideChar( cp_src,
+                                0,
+                                lpMultiByteString,
+                                lenStr,
+                                static_cast< LPWSTR >( ptrHGlob.GetMemPtr( ) ),
+                                ptrHGlob.MemSize( ) );
+}
+
+// converts unicode text into text of the specified code page
+// automatically calculates the necessary buffer size and allocates
+// the buffer
+
+int WideCharToMultiByteEx( UINT cp_dest,
+                           LPCWSTR lpWideCharString,
+                           int lenStr,
+                           CStgTransferHelper& refDTransHelper,
+                           BOOL bEnsureTrailingZero )
+{
+    OSL_ASSERT( IsValidCodePage( cp_dest ) );
+    OSL_ASSERT( nullptr != lpWideCharString );
+
+    // calculate the required buff size
+    int reqSize = CalcBuffSizeForTextConversion( cp_dest, lpWideCharString, lenStr );
+
+    if ( bEnsureTrailingZero )
+        reqSize += sizeof( sal_Int8 );
+
+    // initialize the data-transfer helper
+    refDTransHelper.init( reqSize );
+
+    // setup a global memory pointer
+    CRawHGlobalPtr ptrHGlob( refDTransHelper );
+
+    // do the conversion and return
+    return WideCharToMultiByte( cp_dest,
+                                0,
+                                lpWideCharString,
+                                lenStr,
+                                static_cast< LPSTR >( ptrHGlob.GetMemPtr( ) ),
+                                ptrHGlob.MemSize( ),
+                                nullptr,
+                                nullptr );
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
-- 
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