strchr.cpp
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上传日期:2007-02-14
资源大小:24088k
文件大小:2k
源码类别:
系统编程
开发平台:
Visual C++
- /*****************************************************************/
- /** Microsoft Windows for Workgroups **/
- /** Copyright (C) Microsoft Corp., 1991-1992 **/
- /*****************************************************************/
- /*
- strchr.cxx
- NLS/DBCS-aware string class: strchr method
- This file contains the implementation of the strchr 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::strchr
- SYNOPSIS: Puts the index of the first occurrence of ch in *this
- into istrPos.
- ENTRY: pistrPos - points to ISTR in which to leave pos
- ch - character sought
- istrStart- staring point in string. If omitted, start
- at beginning
- EXIT: pistrPos
- RETURNS: TRUE if character found; otherwise FALSE
- NOTES: This routine only works for CHAR - not WCHAR.
- Hence it's useless for double-byte characters
- under MBCS.
- HISTORY:
- johnl 11/26/90 Written
- beng 07/22/91 Allow on erroneous strings; simplified CheckIstr
- ********************************************************************/
- BOOL NLS_STR::strchr( ISTR * pistrPos, const CHAR ch ) const
- {
- if ( QueryError() )
- return FALSE;
- UpdateIstr( pistrPos );
- CheckIstr( *pistrPos );
- const CHAR * pchStrRes = ::strchrf( QueryPch(), ch );
- if ( pchStrRes == NULL )
- {
- pistrPos->SetIB( strlen() );
- return FALSE;
- }
- pistrPos->SetIB((DWORD)(pchStrRes - QueryPch()));
- return TRUE;
- }
- BOOL NLS_STR::strchr( ISTR * pistrPos, const CHAR ch,
- const ISTR & istrStart ) const
- {
- if ( QueryError() )
- return FALSE;
- CheckIstr( istrStart );
- UpdateIstr( pistrPos );
- CheckIstr( *pistrPos );
- const CHAR * pchStrRes = ::strchrf( QueryPch(istrStart), ch );
- if ( pchStrRes == NULL )
- {
- pistrPos->SetIB( strlen() );
- return FALSE;
- }
- pistrPos->SetIB((DWORD)(pchStrRes - QueryPch()));
- return TRUE;
- }
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