dtrans/source/win32/dtobj/TxtCnvtHlp.cxx

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   5  * Copyright 2008 by Sun Microsystems, Inc.
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   9  * $RCSfile: TxtCnvtHlp.cxx,v $
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  30
  31 // MARKER(update_precomp.py): autogen include statement, do not remove
  32 #include "precompiled_dtrans.hxx"
  33
  34 //------------------------------------------------------------------------
  35 // includes
  36 //------------------------------------------------------------------------
  37 #include <osl/diagnose.h>
  38 #include "TxtCnvtHlp.hxx"
  39 #include "DTransHelper.hxx"
  40 #include "..\misc\ImplHelper.hxx"
  41
  42 using namespace ::com::sun::star::datatransfer;
  43 using namespace ::com::sun::star::uno;
  44
  45 //------------------------------------------------------------------
  46 // assuming a '\0' terminated string if no length specified
  47 //------------------------------------------------------------------
  48
  49 int CalcBuffSizeForTextConversion( UINT code_page, LPCSTR lpMultiByteString, int nLen = -1 )
  50 {
  51     return ( MultiByteToWideChar( code_page,
  52                                 0,
  53                                 lpMultiByteString,
  54                                 nLen,
  55                                 NULL,
  56                                 0 ) * sizeof( sal_Unicode ) );
  57 }
  58
  59 //------------------------------------------------------------------
  60 // assuming a '\0' terminated string if no length specified
  61 //------------------------------------------------------------------
  62
  63 int CalcBuffSizeForTextConversion( UINT code_page, LPCWSTR lpWideCharString, int nLen = -1 )
  64 {
  65     return WideCharToMultiByte( code_page,
  66                                 0,
  67                                 lpWideCharString,
  68                                 nLen,
  69                                 NULL,
  70                                 0,
  71                                 NULL,
  72                                 NULL );
  73 }
  74
  75 //------------------------------------------------------------------
  76 // converts text in one code page into unicode text
  77 // automatically calculates the necessary buffer size and allocates
  78 // the buffer
  79 //------------------------------------------------------------------
  80
  81 int MultiByteToWideCharEx( UINT cp_src,
  82                            LPCSTR lpMultiByteString,
  83                            sal_uInt32 lenStr,
  84                            CStgTransferHelper& refDTransHelper,
  85                            BOOL bEnsureTrailingZero )
  86 {
  87     OSL_ASSERT( IsValidCodePage( cp_src ) );
  88     OSL_ASSERT( NULL != lpMultiByteString );
  89
  90     // calculate the required buff size
  91     int reqSize = CalcBuffSizeForTextConversion( cp_src, lpMultiByteString, lenStr );
  92
  93     if ( bEnsureTrailingZero )
  94         reqSize += sizeof( sal_Unicode );
  95
  96     // initialize the data-transfer helper
  97     refDTransHelper.init( reqSize );
  98
  99     // setup a global memory pointer
 100     CRawHGlobalPtr ptrHGlob( refDTransHelper );
 101
 102     // do the converssion an return
 103     return MultiByteToWideChar( cp_src,
 104                                 0,
 105                                 lpMultiByteString,
 106                                 lenStr,
 107                                 static_cast< LPWSTR >( ptrHGlob.GetMemPtr( ) ),
 108                                 ptrHGlob.MemSize( ) );
 109 }
 110
 111 //------------------------------------------------------------------
 112 // converts unicode text into text of the specified code page
 113 // automatically calculates the necessary buffer size and allocates
 114 // the buffer
 115 //------------------------------------------------------------------
 116
 117 int WideCharToMultiByteEx( UINT cp_dest,
 118                            LPCWSTR lpWideCharString,
 119                            sal_uInt32 lenStr,
 120                            CStgTransferHelper& refDTransHelper,
 121                            BOOL bEnsureTrailingZero )
 122 {
 123     OSL_ASSERT( IsValidCodePage( cp_dest ) );
 124     OSL_ASSERT( NULL != lpWideCharString );
 125
 126     // calculate the required buff size
 127     int reqSize = CalcBuffSizeForTextConversion( cp_dest, lpWideCharString, lenStr );
 128
 129     if ( bEnsureTrailingZero )
 130         reqSize += sizeof( sal_Int8 );
 131
 132     // initialize the data-transfer helper
 133     refDTransHelper.init( reqSize );
 134
 135     // setup a global memory pointer
 136     CRawHGlobalPtr ptrHGlob( refDTransHelper );
 137
 138     // do the converssion an return
 139     return WideCharToMultiByte( cp_dest,
 140                                 0,
 141                                 lpWideCharString,
 142                                 lenStr,
 143                                 static_cast< LPSTR >( ptrHGlob.GetMemPtr( ) ),
 144                                 ptrHGlob.MemSize( ),
 145                                 NULL,
 146                                 NULL );
 147 }
 148