 /* The copyright in this software is being made available under the BSD
 * License, included below. This software may be subject to other third party
 * and contributor rights, including patent rights, and no such rights are
 * granted under this license.
 *
 * Copyright (c) 2010-2017, ITU/ISO/IEC
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *  * Neither the name of the ITU/ISO/IEC nor the names of its contributors may
 *    be used to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

/** \file     dtrace.h
 *  \brief    Implementation of trace messages support for debugging
 */

#ifndef _DTRACE_H_
#define _DTRACE_H_

#include <stdio.h>

#include <string>
#include <list>
#include <map>
#include <set>
#include <vector>
#include <cstdarg>

class CDTrace;

typedef std::string CType;

struct dtrace_channel
{
  int channel_number;
  std::string channel_name;
};

typedef std::vector< dtrace_channel > dtrace_channels_t;

class Condition
{
public:
    CType type;
    bool ( *eval )( int, int );
    int rval;

    Condition( CType t, bool ( *efunc )( int,int ), int refval )
    : type(t), eval(efunc), rval(refval)
    {}
};

class Channel
{
    typedef std::vector<Condition> Rule;
public:
    Channel() : rule_list(), _active(false), _counter(0) {}
    void update( std::map< CType, int > state );
    bool active() { return _active; }
    void add( Rule rule );
    void incrementCounter() { _counter++; }
    void decrementCounter() { _counter--  ; }
    int64_t getCounter() { return _counter; }
private:
    std::list< Rule > rule_list;
    bool _active;
    int64_t _counter;
};

class CDTrace
{
  typedef std::pair< CType, int > state_type;
  //friend class Rules;
private:
    bool          copy;
    FILE         *m_trace_file;
    int           m_error_code;

    typedef std::string Key;
    typedef std::vector<std::string> vstring;
    typedef std::map< Key, int > channel_map_t;
    std::vector< Channel > chanRules;
    std::set< CType > condition_types;
    std::map< CType, int > state;
    std::map< Key, int > deserializationTable;

public:
    CDTrace() : copy(false), m_trace_file(NULL) {}
    CDTrace( const char *filename, vstring channel_names );
    CDTrace( const char *filename, const dtrace_channels_t& channels );
    CDTrace( const std::string& sTracingFile, const std::string& sTracingRule, const dtrace_channels_t& channels );
    CDTrace( const CDTrace& other );
    CDTrace& operator=( const CDTrace& other );
    ~CDTrace();
    void swap         ( CDTrace& other );
    int  addRule      ( std::string rulestring );
    template<bool bCount>
    void dtrace       ( int, const char *format, /*va_list args*/... );
    void dtrace_repeat( int, int i_times, const char *format, /*va_list args*/... );
    bool update       ( state_type stateval );
    int  init( vstring channel_names );
    int  getLastError() { return m_error_code;  }
    const char*  getChannelName( int channel_number );
    void getChannelsList( std::string& sChannels );
    std::string getErrMessage();
    int64_t getChannelCounter( int channel ) { return chanRules[channel].getCounter(); }
    void    decrementChannelCounter( int channel ) { chanRules[channel].decrementCounter(); }
};


#endif // _DTRACE_H_

