greenplumn COstreamString 源码

2022-08-18
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greenplumn COstreamString 代码

文件路径：/src/backend/gporca/libgpos/src/io/COstreamString.cpp

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2009 - 2010 Greenplum Inc.
//
//	@filename:
//		COstreamString.cpp
//
//	@doc:
//		Implementation of basic wide character output stream
//---------------------------------------------------------------------------

#include "gpos/io/COstreamString.h"

#include "gpos/base.h"
#include "gpos/string/CWStringConst.h"

using namespace gpos;


//---------------------------------------------------------------------------
//	@function:
//		COstreamString::COstreamString
//
//	@doc:
//		ctor
//
//---------------------------------------------------------------------------
COstreamString::COstreamString(CWString *pws) : COstream(), m_string(pws)
{
	GPOS_ASSERT(m_string && "Backing string cannot be NULL");
}

//---------------------------------------------------------------------------
//	@function:
//		COstreamString::operator<<
//
//	@doc:
//		WCHAR array write thru;
//
//---------------------------------------------------------------------------
IOstream &
COstreamString::operator<<(const WCHAR *wc_array)
{
	m_string->AppendWideCharArray(wc_array);

	return *this;
}

//---------------------------------------------------------------------------
//	@function:
//		COstreamString::operator<<
//
//	@doc:
//		CHAR array write thru;
//
//---------------------------------------------------------------------------
IOstream &
COstreamString::operator<<(const CHAR *c)
{
	m_string->AppendCharArray(c);

	return *this;
}


//---------------------------------------------------------------------------
//	@function:
//		COstreamString::operator<<
//
//	@doc:
//		WCHAR write thru;
//
//---------------------------------------------------------------------------
IOstream &
COstreamString::operator<<(const WCHAR wc)
{
	WCHAR wc_array[2];
	wc_array[0] = wc;
	wc_array[1] = L'\0';
	m_string->AppendWideCharArray(wc_array);

	return *this;
}


//---------------------------------------------------------------------------
//	@function:
//		COstreamString::operator<<
//
//	@doc:
//		CHAR write thru;
//
//---------------------------------------------------------------------------
IOstream &
COstreamString::operator<<(const CHAR c)
{
	CHAR char_array[2];
	char_array[0] = c;
	char_array[1] = '\0';
	m_string->AppendCharArray(char_array);

	return *this;
}


// EOF

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本文标签： greenplum
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