windows-server-2003/shell/ext/ratings/common/strstr.cpp

/*****************************************************************/ 
/**				  Microsoft Windows for Workgroups				**/
/**			  Copyright (C) Microsoft Corp., 1991-1992			**/
/*****************************************************************/ 

/*
	strstr.cxx
	NLS/DBCS-aware string class: strstr method

	This file contains the implementation of the strstr 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>


/*******************************************************************

	NAME:		NLS_STR::strstr

	SYNOPSIS:	Returns TRUE if the passed string is found, false otherwise.
				pistrPos contains start of the specified string if TRUE
				is returned.

	ENTRY:

	EXIT:

	NOTES:

	HISTORY:
		johnl	11/16/90	Written
		beng	07/23/91	Allow on erroneous string; simplified CheckIstr

********************************************************************/

BOOL NLS_STR::strstr( ISTR * pistrPos, const NLS_STR & nls ) const
{
	if (QueryError() || !nls)
		return FALSE;

	UpdateIstr( pistrPos );
	CheckIstr( *pistrPos );

	const CHAR * pchStrRes = ::strstrf( QueryPch(), nls.QueryPch() );

	if ( pchStrRes == NULL )
	{
		pistrPos->SetIB( strlen() );
		return FALSE;
	}

	pistrPos->SetIB((int) (pchStrRes - QueryPch()));
	return TRUE;
}


BOOL NLS_STR::strstr( ISTR    * pistrPos,
					  const NLS_STR & nls,
					  const ISTR    & istrStart ) const
{
	if (QueryError() || !nls)
		return FALSE;

	CheckIstr( istrStart );
	UpdateIstr( pistrPos );
	CheckIstr( *pistrPos );

	const CHAR * pchStrRes = ::strstrf(QueryPch(istrStart), nls.QueryPch() );

	if ( pchStrRes == NULL )
	{
		pistrPos->SetIB( strlen() );
		return FALSE;
	}

	pistrPos->SetIB((int)(pchStrRes - QueryPch()));
	return TRUE;
}