/* -*- c++ -*- */
/*
 * Copyright 2004,2009 Free Software Foundation, Inc.
 * 
 * This file is part of GNU Radio
 * 
 * GNU Radio is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3, or (at your option)
 * any later version.
 * 
 * GNU Radio is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with GNU Radio; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <gr_block.h>
#include <gr_block_detail.h>
#include <stdexcept>
#include <iostream>

gr_block::gr_block (const std::string &name,
		    gr_io_signature_sptr input_signature,
		    gr_io_signature_sptr output_signature)
  : gr_basic_block(name, input_signature, output_signature),
    d_output_multiple (1),
    d_relative_rate (1.0),
    d_history(1),
    d_fixed_rate(false)
{
}
  
gr_block::~gr_block ()
{
}

// stub implementation:  1:1

void
gr_block::forecast (int noutput_items, gr_vector_int &ninput_items_required)
{
  unsigned ninputs = ninput_items_required.size ();
  for (unsigned i = 0; i < ninputs; i++)
    ninput_items_required[i] = noutput_items + history() - 1;
}

// default implementation

bool
gr_block::start()
{
  return true;
}

bool
gr_block::stop()
{
  return true;
}

void
gr_block::set_output_multiple (int multiple)
{
  if (multiple < 1)
    throw std::invalid_argument ("gr_block::set_output_multiple");

  d_output_multiple = multiple;
}

void
gr_block::set_relative_rate (double relative_rate)
{
  if (relative_rate < 0.0)
    throw std::invalid_argument ("gr_block::set_relative_rate");
  
  d_relative_rate = relative_rate;
}


void
gr_block::consume (int which_input, int how_many_items)
{
  d_detail->consume (which_input, how_many_items);
}

void
gr_block::consume_each (int how_many_items)
{
  d_detail->consume_each (how_many_items);
}

void
gr_block::produce (int which_output, int how_many_items)
{
  d_detail->produce (which_output, how_many_items);
}

int
gr_block::fixed_rate_ninput_to_noutput(int ninput)
{
  throw std::runtime_error("Unimplemented");
}

int
gr_block::fixed_rate_noutput_to_ninput(int noutput)
{
  throw std::runtime_error("Unimplemented");
}

std::ostream&
operator << (std::ostream& os, const gr_block *m)
{
  os << "<gr_block " << m->name() << " (" << m->unique_id() << ")>";
  return os;
}