102 lines
2.4 KiB
C++
102 lines
2.4 KiB
C++
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/*****************************************************************/
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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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strparty.cxx
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NLS/DBCS-aware string class: party support
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This file contains the implementation of the Party() and
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DonePartying() methods of NLS_STR, used for string operations
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outside the set supported by NLS_STR itself.
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FILE HISTORY:
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gregj 03/25/93 Created
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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::Party
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SYNOPSIS: Obtains read-write access to the string buffer, and
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disables standard member function access to the string.
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ENTRY: No parameters
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EXIT: Returns a pointer to the string, NULL if in an error state
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NOTES: Use Party() with care. Check your partying code to
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make sure it's DBCS-safe, doesn't overflow the string
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buffer, etc.
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Each Party() must be matched with a DonePartying() call.
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They cannot be nested. It's probably not a good idea
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to leave a string in the Party()ing state for long.
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HISTORY:
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gregj 03/25/93 Created
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********************************************************************/
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CHAR *NLS_STR::Party()
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{
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if (QueryError())
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return NULL;
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ReportError( WN_ACCESS_DENIED ); // keep other folks out
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return _pchData; // OK, go party
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}
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/*******************************************************************
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NAME: NLS_STR::DonePartying
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SYNOPSIS: Releases read-write access to the string buffer, and
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re-enables standard member access.
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ENTRY: cchNew - new string length (may be omitted, in which
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case it's determined by strlenf())
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EXIT: No return value
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NOTES:
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HISTORY:
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gregj 03/25/93 Created
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lens 03/16/94 Don't let Party/DonePartying pairs lose hard allocation errors.
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********************************************************************/
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VOID NLS_STR::DonePartying( INT cchNew )
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{
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_cchLen = cchNew; // store new length
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if (QueryError() == WN_ACCESS_DENIED ) {
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ReportError( WN_SUCCESS ); // standard members can access now
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}
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IncVers(); // all ISTRs are invalid now
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}
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VOID NLS_STR::DonePartying( VOID )
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{
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DonePartying( ::strlenf( _pchData ) );
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}
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