116 lines
2.5 KiB
C++
116 lines
2.5 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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strnchar.cxx
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NLS/DBCS-aware string class:QueryNumChar method
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This file contains the implementation of the QueryNumChar 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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terryk 04/04/91 Creation
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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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#ifdef EXTENDED_STRINGS
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/*******************************************************************
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NAME: NLS_STR::QueryNumChar
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SYNOPSIS: return the total number of character within the string
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RETURNS: The number of logical character within the string
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NOTES:
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Treats erroneous string as having length 0
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HISTORY:
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terryk 04/04/91 Written
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beng 07/23/91 Allow on erroneous string
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********************************************************************/
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INT NLS_STR::QueryNumChar() const
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{
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if (QueryError())
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return 0;
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ISTR istrCurPos( *this );
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INT cchCounter = 0;
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for ( ;
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this->QueryChar( istrCurPos ) != '\0';
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istrCurPos++, cchCounter ++ )
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;
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return cchCounter;
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}
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/*******************************************************************
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NAME: NLS_STR::QueryTextLength
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SYNOPSIS: Calculate length of text in CHARS, sans terminator
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RETURNS: Count of CHARs
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NOTES:
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Compare QueryNumChar, which returns a number of glyphs.
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In a DBCS environment, this member will return 2 CHARS for
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each double-byte character, since a CHAR is there only 8 bits.
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HISTORY:
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beng 07/23/91 Created
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********************************************************************/
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INT NLS_STR::QueryTextLength() const
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{
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return _cchLen / sizeof(CHAR);
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}
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/*******************************************************************
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NAME: NLS_STR::QueryTextSize
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SYNOPSIS: Calculate length of text in BYTES, including terminator
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RETURNS: Count of BYTES
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NOTES:
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QueryTextSize returns the number of bytes needed to duplicate
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the string into a byte vector.
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HISTORY:
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beng 07/23/91 Created
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********************************************************************/
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INT NLS_STR::QueryTextSize() const
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{
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return _cchLen+sizeof(CHAR);
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}
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#endif // EXTENDED_STRINGS
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