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