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// $Id$
#ifndef ACE_BUFFERED_STREAM_BUFFER_CPP
#define ACE_BUFFERED_STREAM_BUFFER_CPP
#include "ace/INet/BufferedStreamBuffer.h"
#include "ace/OS_Memory.h"
#include "ace/OS_NS_string.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
namespace ACE
{
namespace IOS
{
template <class ACE_CHAR_T, class TR>
BasicBufferedStreamBuffer<ACE_CHAR_T, TR>::BasicBufferedStreamBuffer (
std::streamsize bufsz,
typename std::basic_ios<ACE_CHAR_T, TR>::openmode mode)
: bufsize_ (bufsz),
mode_ (mode),
interceptor_ (0)
{
char_type* p = 0;
ACE_NEW_NORETURN (p, char_type [bufsz]);
this->buffer_.reset (p);
this->setg (this->buffer_.get () + 4,
this->buffer_.get () + 4,
this->buffer_.get () + 4);
this->setp (this->buffer_.get (),
this->buffer_.get () + (this->bufsize_ - 1));
}
template <class ACE_CHAR_T, class TR>
BasicBufferedStreamBuffer<ACE_CHAR_T, TR>::~BasicBufferedStreamBuffer ()
{
}
template <class ACE_CHAR_T, class TR>
typename BasicBufferedStreamBuffer<ACE_CHAR_T, TR>::int_type
BasicBufferedStreamBuffer<ACE_CHAR_T, TR>::overflow (int_type c)
{
if (!(this->mode_ & ios_type::out)) return char_traits::eof ();
if (c != char_traits::eof ())
{
*this->pptr () = char_traits::to_char_type (c);
this->pbump (1);
}
if (this->flush_buffer () == std::streamsize (-1)) return char_traits::eof ();
return c;
}
template <class ACE_CHAR_T, class TR>
typename BasicBufferedStreamBuffer<ACE_CHAR_T, TR>::int_type
BasicBufferedStreamBuffer<ACE_CHAR_T, TR>::underflow ()
{
if (!(this->mode_ & ios_type::in)) return char_traits::eof ();
if (this->gptr () && (this->gptr () < this->egptr ()))
return char_traits::to_int_type (*this->gptr ());
int putback = int (this->gptr () - this->eback ());
if (putback > 4) putback = 4;
ACE_OS::memmove (this->buffer_.get () + (4 - putback),
this->gptr (),
putback * sizeof (char_type));
if (this->interceptor_)
this->interceptor_->before_read (this->bufsize_ - 4);
int n = this->read_from_stream (this->buffer_.get () + 4,
this->bufsize_ - 4);
if (this->interceptor_)
this->interceptor_->after_read (this->buffer_.get () + 4, n);
if (n <= 0)
{
if (this->interceptor_)
this->interceptor_->on_eof ();
return char_traits::eof ();
}
this->setg (this->buffer_.get () + (4 - putback),
this->buffer_.get () + 4,
this->buffer_.get () + 4 + n);
// return next character
return char_traits::to_int_type (*this->gptr ());
}
template <class ACE_CHAR_T, class TR>
int
BasicBufferedStreamBuffer<ACE_CHAR_T, TR>::sync ()
{
if (this->pptr () && this->pptr () > this->pbase ())
{
if (this->flush_buffer () == -1) return -1;
}
return 0;
}
template <class ACE_CHAR_T, class TR>
void
BasicBufferedStreamBuffer<ACE_CHAR_T, TR>::set_interceptor (interceptor_type& interceptor)
{
this->interceptor_ = &interceptor;
}
template <class ACE_CHAR_T, class TR>
void
BasicBufferedStreamBuffer<ACE_CHAR_T, TR>::set_mode (
typename std::basic_ios<ACE_CHAR_T, TR>::openmode mode)
{
this->mode_ = mode;
}
template <class ACE_CHAR_T, class TR>
typename std::basic_ios<ACE_CHAR_T, TR>::openmode
BasicBufferedStreamBuffer<ACE_CHAR_T, TR>::get_mode () const
{
return this->mode_;
}
template <class ACE_CHAR_T, class TR>
int
BasicBufferedStreamBuffer<ACE_CHAR_T, TR>::read_from_stream (char_type* /*buffer*/, std::streamsize /*length*/)
{
// to be implemented in derived class
return 0;
}
template <class ACE_CHAR_T, class TR>
int
BasicBufferedStreamBuffer<ACE_CHAR_T, TR>::write_to_stream (const char_type* /*buffer*/, std::streamsize /*length*/)
{
// to be implemented in derived class
return 0;
}
template <class ACE_CHAR_T, class TR>
void
BasicBufferedStreamBuffer<ACE_CHAR_T, TR>::reset_buffers()
{
this->setg (this->buffer_.get () + 4,
this->buffer_.get () + 4,
this->buffer_.get () + 4);
this->setp (this->buffer_.get (),
this->buffer_.get () + (this->bufsize_ - 1));
}
template <class ACE_CHAR_T, class TR>
int
BasicBufferedStreamBuffer<ACE_CHAR_T, TR>::flush_buffer ()
{
int n = int (this->pptr () - this->pbase ());
if (this->interceptor_)
this->interceptor_->before_write (this->pbase (), n);
int n_out = this->write_to_stream (this->pbase (), n);
if (this->interceptor_)
this->interceptor_->after_write (n_out);
if (n_out == n)
{
this->pbump (-n);
return n;
}
return -1;
}
}
}
ACE_END_VERSIONED_NAMESPACE_DECL
#endif /* ACE_BUFFERED_STREAM_BUFFER_CPP */
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