You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
116 lines
2.8 KiB
116 lines
2.8 KiB
/*****************************************************************/
|
|
/** Microsoft Windows for Workgroups **/
|
|
/** Copyright (C) Microsoft Corp., 1991-1992 **/
|
|
/*****************************************************************/
|
|
|
|
/*
|
|
strqss.cxx
|
|
NLS/DBCS-aware string class: QuerySubStr method
|
|
|
|
This file contains the implementation of the QuerySubStr method
|
|
for the STRING class. It is separate so that clients of STRING which
|
|
do not use this operator need not link to it.
|
|
|
|
FILE HISTORY:
|
|
beng 01/18/91 Separated from original monolithic .cxx
|
|
beng 02/07/91 Uses lmui.hxx
|
|
|
|
*/
|
|
|
|
#include "npcommon.h"
|
|
|
|
extern "C"
|
|
{
|
|
#include <netlib.h>
|
|
}
|
|
|
|
#if defined(DEBUG)
|
|
static const CHAR szFileName[] = __FILE__;
|
|
#define _FILENAME_DEFINED_ONCE szFileName
|
|
#endif
|
|
#include <npassert.h>
|
|
|
|
#include <npstring.h>
|
|
|
|
|
|
// Magic value used below
|
|
//
|
|
#define CB_ENTIRE_STRING (-1)
|
|
|
|
|
|
/*******************************************************************
|
|
|
|
NAME: NLS_STR::QuerySubStr
|
|
|
|
SYNOPSIS: Return a pointer to a new NLS_STR that contains the contents
|
|
of *this from istrStart to:
|
|
istrStart end of string or
|
|
istrStart + istrEnd
|
|
|
|
ENTRY:
|
|
|
|
EXIT:
|
|
|
|
RETURNS: Pointer to newly alloc'd NLS_STR, or NULL if error
|
|
|
|
NOTES: The private method QuerySubStr(ISTR&, CB) is the worker
|
|
method, the other two just check the parameters and
|
|
pass the data. It is private since we can't allow the
|
|
user to access the string on a byte basis
|
|
|
|
CAVEAT: Note that this method creates an NLS_STR that the client is
|
|
responsible for deleting.
|
|
|
|
HISTORY:
|
|
johnl 11/26/90 Created
|
|
beng 04/26/91 Replaced CB wth INT; broke out CB_ENTIRE_STRING
|
|
magic value
|
|
beng 07/23/91 Allow on erroneous string; simplified CheckIstr
|
|
|
|
********************************************************************/
|
|
|
|
NLS_STR * NLS_STR::QuerySubStr( const ISTR & istrStart, INT cbLen ) const
|
|
{
|
|
if (QueryError())
|
|
return NULL;
|
|
|
|
CheckIstr( istrStart );
|
|
|
|
INT cchStrLen = ::strlenf(QueryPch(istrStart) );
|
|
INT cbCopyLen = ( cbLen == CB_ENTIRE_STRING || cbLen >= cchStrLen )
|
|
? cchStrLen
|
|
: cbLen;
|
|
|
|
NLS_STR *pnlsNew = new NLS_STR( cbCopyLen + 1 );
|
|
if ( pnlsNew == NULL )
|
|
return NULL;
|
|
|
|
if ( pnlsNew->QueryError() )
|
|
{
|
|
delete pnlsNew;
|
|
return NULL;
|
|
}
|
|
|
|
::memcpyf( pnlsNew->_pchData, QueryPch(istrStart), cbCopyLen );
|
|
*(pnlsNew->_pchData + cbCopyLen) = '\0';
|
|
|
|
pnlsNew->_cchLen = cbCopyLen;
|
|
|
|
return pnlsNew;
|
|
}
|
|
|
|
|
|
NLS_STR * NLS_STR::QuerySubStr( const ISTR & istrStart ) const
|
|
{
|
|
return QuerySubStr( istrStart, CB_ENTIRE_STRING );
|
|
}
|
|
|
|
|
|
NLS_STR * NLS_STR::QuerySubStr( const ISTR & istrStart,
|
|
const ISTR & istrEnd ) const
|
|
{
|
|
CheckIstr( istrEnd );
|
|
UIASSERT( istrEnd.QueryIB() >= istrStart.QueryIB() );
|
|
|
|
return QuerySubStr( istrStart, istrEnd - istrStart );
|
|
}
|