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// file : xsd/cxx/zc-istream.hxx
// author : Boris Kolpackov <boris@codesynthesis.com>
// copyright : Copyright (c) 2005-2009 Code Synthesis Tools CC
// license : GNU GPL v2 + exceptions; see accompanying LICENSE file
#ifndef XSD_CXX_ZC_ISTREAM_HXX
#define XSD_CXX_ZC_ISTREAM_HXX
#include <string>
#include <istream>
#include <xsd/cxx/ro-string.hxx>
namespace xsd
{
namespace cxx
{
// Input streambuffer that does not copy the underlying
// buffer (zero copy).
//
template <typename C>
class zc_streambuf: public std::basic_streambuf<C>
{
public:
typedef typename std::basic_streambuf<C>::int_type int_type;
typedef typename std::basic_streambuf<C>::traits_type traits_type;
public:
zc_streambuf (const ro_string<C>&);
zc_streambuf (const std::basic_string<C>&);
protected:
virtual std::streamsize
showmanyc ();
virtual int_type
underflow ();
private:
void
init ();
private:
zc_streambuf (const zc_streambuf&);
zc_streambuf&
operator= (const zc_streambuf&);
private:
ro_string<C> str_;
};
// Input string stream that does not copy the underlying string.
//
template <typename C>
class zc_istream_base
{
protected:
zc_istream_base (const ro_string<C>&);
zc_istream_base (const std::basic_string<C>&);
protected:
zc_streambuf<C> buf_;
};
template <typename C>
class zc_istream: protected zc_istream_base<C>,
public std::basic_istream<C>
{
public:
zc_istream (const ro_string<C>&);
zc_istream (const std::basic_string<C>&);
bool
exhausted ()
{
return this->get () == std::basic_istream<C>::traits_type::eof ();
}
private:
zc_istream (const zc_istream&);
zc_istream&
operator= (const zc_istream&);
};
}
}
#include <xsd/cxx/zc-istream.txx>
#endif // XSD_CXX_ZC_ISTREAM_HXX
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