845 lines
19 KiB
C++
845 lines
19 KiB
C++
/*++
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Copyright (c) 1997 Microsoft Corporation
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Module Name:
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string.cpp
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Abstract:
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Author:
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Vlad Sadovsky (vlads) 26-Jan-1997
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Revision History:
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26-Jan-1997 VladS created
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--*/
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//
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// Normal includes only for this module to be active
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//
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#include "cplusinc.h"
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#include "sticomm.h"
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//
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// Private Definations
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//
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//
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// When appending data, this is the extra amount we request to avoid
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// reallocations
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//
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#define STR_SLOP 128
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//
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// Converts a value between zero and fifteen to the appropriate hex digit
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//
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#define HEXDIGIT( nDigit ) \
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(TCHAR)((nDigit) > 9 ? \
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(nDigit) - 10 + 'A' \
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: (nDigit) + '0')
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//
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// Converts a single hex digit to its decimal equivalent
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//
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#define TOHEX( ch ) \
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((ch) > '9' ? \
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(ch) >= 'a' ? \
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(ch) - 'a' + 10 : \
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(ch) - 'A' + 10 \
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: (ch) - '0')
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//
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// Private Globals
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//
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WCHAR STR::_pszEmptyString[] = L"";
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//
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// Construction/Destruction
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//
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STR::STR( const CHAR * pchInit )
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{
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AuxInit( (PBYTE) pchInit, FALSE );
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}
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STR::STR( const WCHAR * pwchInit )
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{
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AuxInit( (PBYTE) pwchInit, TRUE );
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}
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STR::STR( const STR & str )
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{
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AuxInit( (PBYTE) str.QueryPtr(), str.IsUnicode() );
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}
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VOID STR::AuxInit( PBYTE pInit, BOOL fUnicode )
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{
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BOOL fRet;
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_fUnicode = fUnicode;
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_fValid = TRUE;
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if ( pInit )
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{
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INT cbCopy = fUnicode ? (::wcslen( (WCHAR *) pInit ) + 1) * sizeof(WCHAR) :
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(::strlen( (CHAR *) pInit ) + 1) * sizeof(CHAR);
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fRet = Resize( cbCopy );
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if ( !fRet )
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{
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_fValid = FALSE;
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return;
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}
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::memcpy( QueryPtr(), pInit, cbCopy );
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}
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}
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//
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// Appends the string onto this one.
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//
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BOOL STR::Append( const CHAR * pchStr )
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{
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if ( pchStr )
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{
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ASSERT( !IsUnicode() );
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return AuxAppend( (PBYTE) pchStr, ::strlen( pchStr ) );
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}
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return TRUE;
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}
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BOOL STR::Append( const WCHAR * pwchStr )
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{
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if ( pwchStr )
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{
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ASSERT( IsUnicode() );
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return AuxAppend( (PBYTE) pwchStr, ::wcslen( pwchStr ) * sizeof(WCHAR) );
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}
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return TRUE;
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}
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BOOL STR::Append( const STR & str )
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{
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if ( str.IsUnicode() )
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return Append( (const WCHAR *) str.QueryStrW() );
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else
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return Append( (const CHAR *) str.QueryStrA() );
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}
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BOOL STR::AuxAppend( PBYTE pStr, UINT cbStr, BOOL fAddSlop )
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{
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ASSERT( pStr != NULL );
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UINT cbThis = QueryCB();
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//
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// Only resize when we have to. When we do resize, we tack on
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// some extra space to avoid extra reallocations.
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//
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// Note: QuerySize returns the requested size of the string buffer,
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// *not* the strlen of the buffer
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//
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if ( QuerySize() < cbThis + cbStr + sizeof(WCHAR) )
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{
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if ( !Resize( cbThis + cbStr + (fAddSlop ? STR_SLOP : sizeof(WCHAR) )) )
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return FALSE;
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}
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memcpy( (BYTE *) QueryPtr() + cbThis,
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pStr,
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cbStr + (IsUnicode() ? sizeof(WCHAR) : sizeof(CHAR)) );
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return TRUE;
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}
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//
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// Convert in place
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//
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BOOL STR::ConvertToW(VOID)
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{
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if (IsUnicode()) {
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return TRUE;
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}
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UINT cbNeeded = (QueryCB()+1)*sizeof(WCHAR);
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//
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// Only resize when we have to.
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//
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if ( QuerySize() < cbNeeded ) {
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if ( !Resize( cbNeeded)) {
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return FALSE;
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}
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}
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BUFFER buf(cbNeeded);
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if (!buf.QueryPtr()) {
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return FALSE;
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}
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int iRet;
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int cch;
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cch = QueryCCH() + 1;
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iRet = MultiByteToWideChar( CP_ACP,
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MB_PRECOMPOSED,
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QueryStrA(),
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-1,
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(WCHAR *)buf.QueryPtr(),
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cch);
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if ( iRet == 0 ) {
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//
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// Error in conversion.
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//
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return FALSE;
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}
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memcpy( (BYTE *) QueryPtr(),
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buf.QueryPtr(),
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cbNeeded);
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SetUnicode(TRUE);
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return TRUE;
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}
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BOOL STR::ConvertToA(VOID)
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{
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if (!IsUnicode()) {
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return TRUE;
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}
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UINT cbNeeded = (QueryCB()+1)*sizeof(CHAR);
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BUFFER buf(cbNeeded);
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if (!buf.QueryPtr()) {
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return FALSE;
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}
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int iRet;
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int cch;
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cch = cbNeeded;
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iRet = WideCharToMultiByte(CP_ACP,
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0L,
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QueryStrW(),
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-1,
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(CHAR *)buf.QueryPtr(),
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cch,
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NULL,
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NULL
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);
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if ( iRet == 0 ) {
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//
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// Error in conversion.
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//
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return FALSE;
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}
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// Careful here , there might be DBCS characters in resultant buffer
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memcpy( (BYTE *) QueryPtr(),
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buf.QueryPtr(),
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iRet);
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SetUnicode(FALSE);
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return TRUE;
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}
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//
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// Copies the string into this one.
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//
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BOOL STR::Copy( const CHAR * pchStr )
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{
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_fUnicode = FALSE;
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if ( QueryPtr() )
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*(QueryStrA()) = '\0';
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if ( pchStr )
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{
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return AuxAppend( (PBYTE) pchStr, ::strlen( pchStr ), FALSE );
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}
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return TRUE;
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}
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BOOL STR::Copy( const WCHAR * pwchStr )
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{
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_fUnicode = TRUE;
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if ( QueryPtr() )
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*(QueryStrW()) = TEXT('\0');
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if ( pwchStr )
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{
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return AuxAppend( (PBYTE) pwchStr, ::wcslen( pwchStr ) * sizeof(WCHAR), FALSE );
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}
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return TRUE;
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}
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BOOL STR::Copy( const STR & str )
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{
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_fUnicode = str.IsUnicode();
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if ( str.IsEmpty() && QueryPtr() == NULL) {
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// To avoid pathological allocation of small chunk of memory
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return ( TRUE);
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}
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if ( str.IsUnicode() )
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return Copy( str.QueryStrW() );
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else
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return Copy( str.QueryStrA() );
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}
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//
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// Resizes or allocates string memory, NULL terminating if necessary
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//
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BOOL STR::Resize( UINT cbNewRequestedSize )
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{
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BOOL fTerminate = QueryPtr() == NULL;
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if ( !BUFFER::Resize( cbNewRequestedSize ))
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return FALSE;
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if ( fTerminate && cbNewRequestedSize > 0 )
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{
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if ( IsUnicode() )
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{
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ASSERT( cbNewRequestedSize > 1 );
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*QueryStrW() = TEXT('\0');
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}
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else
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*QueryStrA() = '\0';
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}
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return TRUE;
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}
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//
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// Loads a string resource from this module's string table
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// or from the system string table
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//
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// dwResID - System error or module string ID
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// lpszModuleName - name of the module from which to load.
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// If NULL, then load the string from system table.
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//
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//
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BOOL STR::LoadString( IN DWORD dwResID,
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IN LPCTSTR lpszModuleName // Optional
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)
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{
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BOOL fReturn = FALSE;
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INT cch;
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//
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// If lpszModuleName is NULL, load the string from system's string table.
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//
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if ( lpszModuleName == NULL) {
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BYTE * pchBuff = NULL;
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//
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// Call the appropriate function so we don't have to do the Unicode
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// conversion
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//
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if ( IsUnicode() ) {
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cch = ::FormatMessageW( FORMAT_MESSAGE_ALLOCATE_BUFFER |
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FORMAT_MESSAGE_IGNORE_INSERTS |
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FORMAT_MESSAGE_MAX_WIDTH_MASK |
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FORMAT_MESSAGE_FROM_SYSTEM,
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NULL,
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dwResID,
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0,
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(LPWSTR) &pchBuff,
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1024,
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NULL );
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if ( cch ) {
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fReturn = Copy( (LPCWSTR) pchBuff );
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}
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}
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else
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{
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cch = ::FormatMessageA( FORMAT_MESSAGE_ALLOCATE_BUFFER |
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FORMAT_MESSAGE_IGNORE_INSERTS |
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FORMAT_MESSAGE_MAX_WIDTH_MASK |
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FORMAT_MESSAGE_FROM_SYSTEM,
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NULL,
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dwResID,
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0,
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(LPSTR) &pchBuff,
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1024,
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NULL );
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if ( cch ) {
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fReturn = Copy( (LPCSTR) pchBuff );
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}
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}
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//
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// Free the buffer FormatMessage allocated
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//
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if ( cch )
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{
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::LocalFree( (VOID*) pchBuff );
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}
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} else {
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WCHAR ach[STR_MAX_RES_SIZE];
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if ( IsUnicode() )
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{
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cch = ::LoadStringW( GetModuleHandle( lpszModuleName),
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dwResID,
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(WCHAR *) ach,
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sizeof(ach));
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if ( cch )
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{
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fReturn = Copy( (LPWSTR) ach );
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}
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}
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else
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{
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cch = ::LoadStringA( GetModuleHandle( lpszModuleName),
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dwResID,
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(CHAR *) ach,
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sizeof(ach));
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if ( cch )
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{
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fReturn = Copy( (LPSTR) ach );
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}
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}
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}
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return ( fReturn);
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} // STR::LoadString()
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BOOL STR::LoadString( IN DWORD dwResID,
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IN HMODULE hModule
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)
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{
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BOOL fReturn = FALSE;
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INT cch;
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WCHAR ach[STR_MAX_RES_SIZE];
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if ( IsUnicode()) {
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cch = ::LoadStringW(hModule,
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dwResID,
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(WCHAR *) ach,
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sizeof(ach));
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if ( cch ) {
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fReturn = Copy( (LPWSTR) ach );
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}
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} else {
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cch = ::LoadStringA(hModule,
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dwResID,
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(CHAR *) ach,
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sizeof(ach));
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if ( cch ) {
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fReturn = Copy( (LPSTR) ach );
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}
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}
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return ( fReturn);
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} // STR::LoadString()
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BOOL
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STR::FormatStringV(
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IN LPCTSTR lpszModuleName,
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...
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)
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{
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DWORD cch;
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LPSTR pchBuff;
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BOOL fRet = FALSE;
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DWORD dwErr;
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va_list va;
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va_start(va,lpszModuleName);
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cch = ::FormatMessageA( FORMAT_MESSAGE_ALLOCATE_BUFFER |
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FORMAT_MESSAGE_FROM_STRING,
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QueryStrA(),
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0L,
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0,
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(LPSTR) &pchBuff,
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1024,
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&va);
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dwErr = ::GetLastError();
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if ( cch ) {
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fRet = Copy( (LPCSTR) pchBuff );
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::LocalFree( (VOID*) pchBuff );
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}
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return fRet;
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}
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BOOL
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STR::FormatString(
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IN DWORD dwResID,
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IN LPCTSTR apszInsertParams[],
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IN LPCTSTR lpszModuleName
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)
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{
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DWORD cch;
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LPSTR pchBuff;
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BOOL fRet;
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if (!dwResID) {
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cch = ::FormatMessageA( FORMAT_MESSAGE_ALLOCATE_BUFFER |
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FORMAT_MESSAGE_ARGUMENT_ARRAY |
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FORMAT_MESSAGE_FROM_STRING,
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QueryStrA(),
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dwResID,
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0,
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(LPSTR) &pchBuff,
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1024,
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(va_list *) apszInsertParams );
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}
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else {
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cch = ::FormatMessageA( FORMAT_MESSAGE_ALLOCATE_BUFFER |
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FORMAT_MESSAGE_ARGUMENT_ARRAY |
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FORMAT_MESSAGE_FROM_HMODULE,
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GetModuleHandle( lpszModuleName ),
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dwResID,
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0,
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(LPSTR) &pchBuff,
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1024,
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(va_list *) apszInsertParams );
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}
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if ( cch )
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{
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fRet = Copy( (LPCSTR) pchBuff );
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::LocalFree( (VOID*) pchBuff );
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}
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return fRet;
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}
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|
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#if 1
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CHAR * STR::QueryStrA( VOID ) const
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{
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ASSERT( !IsUnicode() );
|
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ASSERT( *_pszEmptyString == TEXT('\0') );
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return (QueryPtr() ? (CHAR *) QueryPtr() : (CHAR *) _pszEmptyString);
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}
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|
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WCHAR * STR::QueryStrW( VOID ) const
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{
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ASSERT( IsUnicode() );
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ASSERT( *_pszEmptyString == TEXT('\0') );
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return (QueryPtr() ? (WCHAR *) QueryPtr() : (WCHAR *) _pszEmptyString);
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}
|
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#endif //DBG
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|
|
|
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|
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BOOL STR::CopyToBuffer( WCHAR * lpszBuffer, LPDWORD lpcch) const
|
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/*++
|
|
Description:
|
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Copies the string into the WCHAR buffer passed in if the buffer
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is sufficient to hold the translated string.
|
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If the buffer is small, the function returns small and sets *lpcch
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to contain the required number of characters.
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|
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Arguments:
|
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lpszBuffer pointer to WCHAR buffer which on return contains
|
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the UNICODE version of string on success.
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lpcch pointer to DWORD containing the length of the buffer.
|
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If *lpcch == 0 then the function returns TRUE with
|
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the count of characters required stored in *lpcch.
|
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Also in this case lpszBuffer is not affected.
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Returns:
|
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TRUE on success.
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FALSE on failure. Use GetLastError() for further details.
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|
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--*/
|
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{
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BOOL fReturn = TRUE;
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|
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if ( lpcch == NULL) {
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SetLastError( ERROR_INVALID_PARAMETER);
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return ( FALSE);
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}
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|
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if ( *lpcch == 0) {
|
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|
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//
|
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// Inquiring the size of buffer alone
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//
|
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*lpcch = QueryCCH() + 1; // add one character for terminating null
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} else {
|
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|
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//
|
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// Copy data to buffer
|
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//
|
|
if ( IsUnicode()) {
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|
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//
|
|
// Do plain copy of the data.
|
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//
|
|
if ( *lpcch >= QueryCCH()) {
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|
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wcscpy( lpszBuffer, QueryStrW());
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} else {
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|
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SetLastError( ERROR_INSUFFICIENT_BUFFER);
|
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fReturn = FALSE;
|
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}
|
|
|
|
} else {
|
|
|
|
//
|
|
// Copy after conversion from ANSI to Unicode
|
|
//
|
|
int iRet;
|
|
iRet = MultiByteToWideChar( CP_ACP, MB_PRECOMPOSED,
|
|
QueryStrA(), QueryCCH() + 1,
|
|
lpszBuffer, (int )*lpcch);
|
|
|
|
if ( iRet == 0 || iRet != (int ) *lpcch) {
|
|
|
|
//
|
|
// Error in conversion.
|
|
//
|
|
fReturn = FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
return ( fReturn);
|
|
} // STR::CopyToBuffer()
|
|
|
|
|
|
BOOL STR::CopyToBufferA( CHAR * lpszBuffer, LPDWORD lpcch) const
|
|
/*++
|
|
Description:
|
|
Copies the string into the CHAR buffer passed in if the buffer
|
|
is sufficient to hold the translated string.
|
|
If the buffer is small, the function returns small and sets *lpcch
|
|
to contain the required number of characters.
|
|
|
|
Arguments:
|
|
lpszBuffer pointer to CHAR buffer which on return contains
|
|
the MBCS version of string on success.
|
|
lpcch pointer to DWORD containing the length of the buffer.
|
|
If *lpcch == 0 then the function returns TRUE with
|
|
the count of characters required stored in *lpcch.
|
|
Also in this case lpszBuffer is not affected.
|
|
Returns:
|
|
TRUE on success.
|
|
FALSE on failure. Use GetLastError() for further details.
|
|
|
|
--*/
|
|
{
|
|
BOOL fReturn = TRUE;
|
|
|
|
if ( lpcch == NULL) {
|
|
SetLastError( ERROR_INVALID_PARAMETER);
|
|
return ( FALSE);
|
|
}
|
|
|
|
if ( *lpcch == 0) {
|
|
|
|
//
|
|
// Inquiring the size of buffer alone
|
|
//
|
|
*lpcch = 2*(QueryCCH() + 1); // add one character for terminating null and on pessimistic side
|
|
// ask for largest possible buffer
|
|
} else {
|
|
|
|
//
|
|
// Copy data to buffer
|
|
//
|
|
if ( !IsUnicode()) {
|
|
lstrcpyA( lpszBuffer, QueryStrA());
|
|
} else {
|
|
|
|
//
|
|
// Copy after conversion from Unicode to MBCS
|
|
//
|
|
int iRet;
|
|
|
|
iRet = WideCharToMultiByte(CP_ACP,
|
|
0L,
|
|
QueryStrW(),
|
|
QueryCCH()+1,
|
|
lpszBuffer,
|
|
*lpcch,
|
|
NULL,NULL
|
|
);
|
|
|
|
if ( iRet == 0 || *lpcch < (DWORD)iRet) {
|
|
*lpcch = iRet;
|
|
fReturn = FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
return ( fReturn);
|
|
} // STR::CopyToBuffer()
|
|
|
|
|
|
/*
|
|
STRArray class implementation- this isn't very efficient, as
|
|
we'll copy every string over again whenever we grow the array, but
|
|
then again, that part of the code may never even get executed, anyway
|
|
*/
|
|
void STRArray::Grow() {
|
|
|
|
// We need to add some more strings to the array
|
|
|
|
STR *pcsNew = new STR[m_ucMax += m_uGrowBy];
|
|
|
|
if (!pcsNew) {
|
|
// We recover gracelessly by replacing the final
|
|
// string.
|
|
|
|
m_ucMax -= m_uGrowBy;
|
|
m_ucItems--;
|
|
return;
|
|
}
|
|
|
|
for (unsigned u = 0; u < m_ucItems; u++)
|
|
pcsNew[u] = (LPCTSTR) m_pcsContents[u];
|
|
|
|
delete[] m_pcsContents;
|
|
m_pcsContents = pcsNew;
|
|
}
|
|
|
|
STRArray::STRArray(unsigned uGrowBy) {
|
|
|
|
m_uGrowBy = uGrowBy ? uGrowBy : 10;
|
|
|
|
m_ucItems = m_ucMax = 0;
|
|
|
|
m_pcsContents = NULL;
|
|
}
|
|
|
|
STRArray::~STRArray() {
|
|
if (m_pcsContents)
|
|
delete[] m_pcsContents;
|
|
}
|
|
|
|
void STRArray::Add(LPCSTR lpstrNew) {
|
|
if (m_ucItems >= m_ucMax)
|
|
Grow();
|
|
|
|
m_pcsContents[m_ucItems++].Copy(lpstrNew);
|
|
}
|
|
|
|
void STRArray::Add(LPCWSTR lpstrNew) {
|
|
if (m_ucItems >= m_ucMax)
|
|
Grow();
|
|
|
|
m_pcsContents[m_ucItems++].Copy(lpstrNew);
|
|
}
|
|
|
|
void STRArray::Tokenize(LPCTSTR lpstrIn, TCHAR tcSplitter) {
|
|
|
|
if (m_pcsContents) {
|
|
delete[] m_pcsContents;
|
|
m_ucItems = m_ucMax = 0;
|
|
m_pcsContents = NULL;
|
|
}
|
|
|
|
if (!lpstrIn || !*lpstrIn)
|
|
return;
|
|
|
|
while (*lpstrIn) {
|
|
|
|
// First, strip off any leading blanks
|
|
|
|
while (*lpstrIn && *lpstrIn == _TEXT(' '))
|
|
lpstrIn++;
|
|
|
|
for (LPCTSTR lpstrMoi = lpstrIn;
|
|
*lpstrMoi && *lpstrMoi != tcSplitter;
|
|
lpstrMoi++)
|
|
;
|
|
// If we hit the end, just add the whole thing to the array
|
|
if (!*lpstrMoi) {
|
|
if (*lpstrIn)
|
|
Add(lpstrIn);
|
|
return;
|
|
}
|
|
|
|
// Otherwise, just add the string up to the splitter
|
|
|
|
TCHAR szNew[MAX_PATH];
|
|
SIZE_T uiLen = (SIZE_T)(lpstrMoi - lpstrIn);
|
|
|
|
if (uiLen < (sizeof(szNew)/sizeof(szNew[0])) - 1) {
|
|
|
|
lstrcpyn(szNew,lpstrIn,(UINT)uiLen);
|
|
szNew[uiLen] = TCHAR('\0');
|
|
|
|
Add((LPCTSTR) szNew);
|
|
}
|
|
|
|
lpstrIn = lpstrMoi + 1;
|
|
}
|
|
}
|
|
|