dtrans/source/win32/dtobj/TxtCnvtHlp.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <osl/diagnose.h>
  21 #include "TxtCnvtHlp.hxx"
  22 #include "DTransHelper.hxx"
  23 #include "../misc/ImplHelper.hxx"
  24
  25 using namespace ::com::sun::star::datatransfer;
  26 using namespace ::com::sun::star::uno;
  27
  28 //------------------------------------------------------------------
  29 // assuming a '\0' terminated string if no length specified
  30 //------------------------------------------------------------------
  31
  32 int CalcBuffSizeForTextConversion( UINT code_page, LPCSTR lpMultiByteString, int nLen = -1 )
  33 {
  34     return ( MultiByteToWideChar( code_page,
  35                                 0,
  36                                 lpMultiByteString,
  37                                 nLen,
  38                                 NULL,
  39                                 0 ) * sizeof( sal_Unicode ) );
  40 }
  41
  42 //------------------------------------------------------------------
  43 // assuming a '\0' terminated string if no length specified
  44 //------------------------------------------------------------------
  45
  46 int CalcBuffSizeForTextConversion( UINT code_page, LPCWSTR lpWideCharString, int nLen = -1 )
  47 {
  48     return WideCharToMultiByte( code_page,
  49                                 0,
  50                                 lpWideCharString,
  51                                 nLen,
  52                                 NULL,
  53                                 0,
  54                                 NULL,
  55                                 NULL );
  56 }
  57
  58 //------------------------------------------------------------------
  59 // converts text in one code page into unicode text
  60 // automatically calculates the necessary buffer size and allocates
  61 // the buffer
  62 //------------------------------------------------------------------
  63
  64 int MultiByteToWideCharEx( UINT cp_src,
  65                            LPCSTR lpMultiByteString,
  66                            sal_uInt32 lenStr,
  67                            CStgTransferHelper& refDTransHelper,
  68                            BOOL bEnsureTrailingZero )
  69 {
  70     OSL_ASSERT( IsValidCodePage( cp_src ) );
  71     OSL_ASSERT( NULL != lpMultiByteString );
  72
  73     // calculate the required buff size
  74     int reqSize = CalcBuffSizeForTextConversion( cp_src, lpMultiByteString, lenStr );
  75
  76     if ( bEnsureTrailingZero )
  77         reqSize += sizeof( sal_Unicode );
  78
  79     // initialize the data-transfer helper
  80     refDTransHelper.init( reqSize );
  81
  82     // setup a global memory pointer
  83     CRawHGlobalPtr ptrHGlob( refDTransHelper );
  84
  85     // do the converssion an return
  86     return MultiByteToWideChar( cp_src,
  87                                 0,
  88                                 lpMultiByteString,
  89                                 lenStr,
  90                                 static_cast< LPWSTR >( ptrHGlob.GetMemPtr( ) ),
  91                                 ptrHGlob.MemSize( ) );
  92 }
  93
  94 //------------------------------------------------------------------
  95 // converts unicode text into text of the specified code page
  96 // automatically calculates the necessary buffer size and allocates
  97 // the buffer
  98 //------------------------------------------------------------------
  99
 100 int WideCharToMultiByteEx( UINT cp_dest,
 101                            LPCWSTR lpWideCharString,
 102                            sal_uInt32 lenStr,
 103                            CStgTransferHelper& refDTransHelper,
 104                            BOOL bEnsureTrailingZero )
 105 {
 106     OSL_ASSERT( IsValidCodePage( cp_dest ) );
 107     OSL_ASSERT( NULL != lpWideCharString );
 108
 109     // calculate the required buff size
 110     int reqSize = CalcBuffSizeForTextConversion( cp_dest, lpWideCharString, lenStr );
 111
 112     if ( bEnsureTrailingZero )
 113         reqSize += sizeof( sal_Int8 );
 114
 115     // initialize the data-transfer helper
 116     refDTransHelper.init( reqSize );
 117
 118     // setup a global memory pointer
 119     CRawHGlobalPtr ptrHGlob( refDTransHelper );
 120
 121     // do the converssion an return
 122     return WideCharToMultiByte( cp_dest,
 123                                 0,
 124                                 lpWideCharString,
 125                                 lenStr,
 126                                 static_cast< LPSTR >( ptrHGlob.GetMemPtr( ) ),
 127                                 ptrHGlob.MemSize( ),
 128                                 NULL,
 129                                 NULL );
 130 }
 131
 132 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */