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107 lines
2.7 KiB
107 lines
2.7 KiB
/*****************************************************************/
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/** Microsoft Windows for Workgroups **/
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/** Copyright (C) Microsoft Corp., 1991-1992 **/
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/*****************************************************************/
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/*
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stris.cxx
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NLS/DBCS-aware string class: InsertStr method
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This file contains the implementation of the InsertStr method
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for the STRING class. It is separate so that clients of STRING which
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do not use this operator need not link to it.
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FILE HISTORY:
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beng 01/18/91 Separated from original monolithic .cxx
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beng 02/07/91 Uses lmui.hxx
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*/
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#include "npcommon.h"
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extern "C"
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{
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#include <netlib.h>
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}
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#if defined(DEBUG)
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static const CHAR szFileName[] = __FILE__;
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#define _FILENAME_DEFINED_ONCE szFileName
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#endif
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#include <npassert.h>
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#include <npstring.h>
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/*******************************************************************
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NAME: NLS_STR::InsertStr
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SYNOPSIS: Insert passed string into *this at istrStart
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ENTRY:
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EXIT: If this function returns FALSE, ReportError has been
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called to report the error that occurred.
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RETURN: TRUE on success, FALSE otherwise.
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NOTES: If *this is not STR_OWNERALLOCed and the inserted string
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won't fit in the allocated space for *this, then *this
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will be reallocated.
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HISTORY:
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johnl 11/28/90 Created
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rustanl 04/14/91 Fixed new length calculation. Report
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error if owner alloc'd and not enough
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space.
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beng 04/26/91 Replaced CB with INT
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beng 07/23/91 Allow on erroneous string;
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simplified CheckIstr
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********************************************************************/
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BOOL NLS_STR::InsertStr( const NLS_STR & nlsIns, ISTR & istrStart )
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{
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if (QueryError() || !nlsIns)
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return FALSE;
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CheckIstr( istrStart );
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INT cbNewSize = strlen() + nlsIns.strlen() + 1 ; // include new null char
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if ( QueryAllocSize() < cbNewSize )
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{
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if ( IsOwnerAlloc())
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{
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// Big trouble! Report error, and return failure.
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//
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UIASSERT( !"Owner alloc'd string not big enough" );
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ReportError( WN_OUT_OF_MEMORY );
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return FALSE;
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}
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// Attempt to allocate more memory
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//
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if ( !realloc( cbNewSize ) )
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{
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ReportError( WN_OUT_OF_MEMORY );
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return FALSE;
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}
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}
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::memmovef( (CHAR *)QueryPch(istrStart) + nlsIns.strlen(),
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(CHAR *)QueryPch(istrStart),
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::strlenf(QueryPch(istrStart) ) + 1 );
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::memmovef( (CHAR *)QueryPch(istrStart),
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(CHAR *)nlsIns.QueryPch(),
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nlsIns.strlen() );
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UIASSERT( cbNewSize >= 1 ); // should have been assigned something +1 above
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_cchLen = cbNewSize - 1; // don't count null character here
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IncVers();
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UpdateIstr( &istrStart ); // This ISTR does not become invalid
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// after the string update
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return TRUE;
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}
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