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// osc responder class
// Copyright (C) 2008 Tim Blechmann
//
// This program 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 2 of the License, or
// (at your option) any later version.
//
// This program 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 this program; see the file COPYING. If not, write to
// the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.
#ifndef OSC_RESPONDER_HPP
#define OSC_RESPONDER_HPP
#include <string>
#include <map>
#include "exists.hpp"
#include "branch_hints.hpp"
#include <boost/tuple/tuple.hpp>
#include "osc/OscReceivedElements.h"
namespace nova
{
class osc_responder
{
public:
virtual ~osc_responder()
{}
virtual void run(osc::ReceivedMessageArgumentIterator begin,
osc::ReceivedMessageArgumentIterator const & end) = 0;
};
class osc_dispatcher
{
typedef std::string string;
typedef std::size_t size_t;
typedef std::multimap<string, osc_responder*> responder_map_t;
public:
static bool is_pattern(const char * pattern)
{
for(;;)
{
if (unlikely(*pattern == 0))
return false;
if (unlikely((*pattern == '?') or (*pattern == '*')))
return true;
++pattern;
}
}
static unsigned int first_pattern_char(const char * pattern)
{
assert(is_pattern(pattern));
unsigned int ret = 0;
for(;;)
{
if (unlikely((*pattern == '?') or (*pattern == '*')))
return ret;
++ret;
++pattern;
}
assert(false);
}
static bool match_pattern(const char * pattern, const char * address)
{
const char pc = *pattern;
const char ac = *address;
if ((pc == 0) and (ac == 0))
return true;
if ((pc == 0) or (ac == 0))
return false;
if (pc == '?')
return match_pattern(++pattern, ++address);
if (pc == '*')
{
for(;;)
{
if (match_pattern(pattern+1, address+1))
return true;
++address;
if (*address == 0)
return *(pattern+1) == 0;
}
}
if (pc != ac)
return false;
else
return match_pattern(++pattern, ++address);
}
void add_responder(string const & address, osc_responder * resp)
{
responder_map.insert(std::make_pair(address, resp));
}
void remove_responder(string const & address, osc_responder * resp)
{
assert(exists(responder_map, address));
responder_map_t::iterator it, end;
boost::tie(it, end) = responder_map.equal_range(address);
for(; it != end; ++it)
{
if (it->second == resp)
{
responder_map.erase(it);
return;
}
}
assert(false);
}
void handle_packet(const char * data, size_t length)
{
assert(length);
if (data[0] == '#')
handle_bundle(data, length);
else
handle_message(data, length);
}
private:
void handle_message(const char * data, size_t length)
{
osc::ReceivedMessage msg(osc::ReceivedPacket(data, length));
handle_message(msg.AddressPattern(), msg.ArgumentsBegin(), msg.ArgumentsEnd());
}
void handle_bundle(const char * data, size_t length)
{
osc::ReceivedBundle bundle(osc::ReceivedPacket(data, length));
handle_bundle(bundle.ElementsBegin(), bundle.ElementsEnd());
}
void handle_bundle(osc::ReceivedBundleElementIterator const & begin,
osc::ReceivedBundleElementIterator const & end)
{
for (osc::ReceivedBundleElementIterator it = begin; it != end; ++it)
{
if (it->IsBundle())
{
osc::ReceivedBundle bundle(*it);
handle_bundle(bundle.ElementsBegin(), bundle.ElementsEnd());
}
else
{
osc::ReceivedMessage msg(*it);
handle_message(msg.AddressPattern(), msg.ArgumentsBegin(), msg.ArgumentsEnd());
}
}
}
void handle_message(char const * pattern, osc::ReceivedMessageArgumentIterator const & begin,
osc::ReceivedMessageArgumentIterator const & end)
{
if (is_pattern(pattern))
handle_pattern(pattern, begin, end);
else
handle_address(pattern, begin, end);
}
void handle_pattern(const char * pattern, osc::ReceivedMessageArgumentIterator const & begin,
osc::ReceivedMessageArgumentIterator const & end)
{
responder_map_t::iterator it;
const unsigned int pattern_begin = first_pattern_char(pattern);
const string pattern_root(pattern, pattern_begin);
it = responder_map.lower_bound(pattern_root);
for(; it != responder_map.end(); ++it)
{
if (match_pattern(pattern, it->first.c_str()))
{
osc_responder * resp = it->second;
resp->run(begin, end);
continue;
}
if (it->first.compare(0, pattern_begin, pattern_root))
return;
}
}
void handle_address(const char * address, osc::ReceivedMessageArgumentIterator const & begin,
osc::ReceivedMessageArgumentIterator const & end)
{
responder_map_t::iterator it, it_end;
boost::tie(it, it_end) = responder_map.equal_range(address);
for(; it != it_end; ++it)
{
osc_responder * resp = it->second;
resp->run(begin, end);
}
}
responder_map_t responder_map;
};
} /* namespace nova */
#endif /* OSC_RESPONDER_HPP */
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