/* -*- c++ -*- */

/*

 * Copyright 2005 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.

 */

/*

 * This code is based on error.cc from the "Click Modular Router".

 * Original copyright follows:

 */

/* 

 * error.{cc,hh} -- flexible classes for error reporting

 * Eddie Kohler

 *

 * Copyright (c) 1999-2000 Massachusetts Institute of Technology

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, subject to the conditions

 * listed in the Click LICENSE file. These conditions include: you must

 * preserve this copyright notice, and you cannot mention the copyright

 * holders in advertising related to the Software without their permission.

 * The Software is provided WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED. This

 * notice is a summary of the Click LICENSE file; the license in that file is

 * legally binding.

 */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include <gr_error_handler.h>

#include <assert.h>

#include <stdexcept>

#include <unistd.h>

#include <stdio.h>

#ifdef HAVE_IO_H

#include <io.h>

#endif

static gr_error_handler        *s_default_handler = 0;

static gr_error_handler *s_silent_handler = 0;

bool

gr_error_handler::has_default_handler()

{

  return s_default_handler != 0;

}

void

gr_error_handler::set_default_handler(gr_error_handler *errh)

{

  s_default_handler = errh;

}

gr_error_handler *

gr_error_handler::default_handler()

{

  assert (s_default_handler != 0);

  return s_default_handler;

}

gr_error_handler *

gr_error_handler::silent_handler()

{

  assert (s_silent_handler != 0);

  return s_silent_handler;

}

// ----------------------------------------------------------------

gr_error_handler::~gr_error_handler()

{

  // nop

}

void

gr_error_handler::debug(const char *format, ...)

{

  va_list val;

  va_start(val, format);

  verror(ERR_DEBUG, format, val);

  va_end(val);

}

void

gr_error_handler::message(const char *format, ...)

{

  va_list val;

  va_start(val, format);

  verror(ERR_MESSAGE, format, val);

  va_end(val);

}

void

gr_error_handler::warning(const char *format, ...)

{

  va_list val;

  va_start(val, format);

  verror(ERR_WARNING, format, val);

  va_end(val);

}

void

gr_error_handler::error(const char *format, ...)

{

  va_list val;

  va_start(val, format);

  verror(ERR_ERROR, format, val);

  va_end(val);

}

void

gr_error_handler::fatal(const char *format, ...)

{

  va_list val;

  va_start(val, format);

  verror(ERR_FATAL, format, val);

  va_end(val);

}

void

gr_error_handler::verror(seriousness s, const char *format, va_list val)

{

  std::string text = make_text(s, format, val);

  handle_text(s, text);

  count_error(s);

}

void

gr_error_handler::verror_text(seriousness s, const std::string &text)

{

  // text is already made

  handle_text(s, text);

  count_error(s);

}

std::string

gr_error_handler::make_text(seriousness s, const char *format, va_list val)

{

  char text_buf[4096];

  vsnprintf(text_buf, sizeof(text_buf), format, val);

  text_buf[sizeof(text_buf)-1] = 0;

  return text_buf;

}

// ----------------------------------------------------------------

void

gr_base_error_handler::count_error(seriousness s)

{

  if (s < ERR_WARNING)

    /* do nothing */;

  else if (s < ERR_ERROR)

    d_nwarnings++;

  else

    d_nerrors++;

}

// ----------------------------------------------------------------

gr_file_error_handler::gr_file_error_handler(FILE *file)

  : d_file(file), d_fd(-1)

{

}

gr_file_error_handler::gr_file_error_handler(int file_descriptor)

{

  d_fd = dup(file_descriptor);        // so we can fclose it

  if (d_fd == -1){

    perror("gr_file_error_handler:dup");

    throw std::invalid_argument("gr_file_error_handler:dup");

  }

  d_file = fdopen(d_fd, "w");

  if (d_file == 0){

    perror("gr_file_error_handler:fdopen");

    throw std::invalid_argument("gr_file_error_handler:fdopen");

  }

}

gr_file_error_handler::~gr_file_error_handler()

{

  if (d_fd != -1){

    fclose(d_file);

  }

}

void

gr_file_error_handler::handle_text(seriousness s, const std::string &text)

{

  if (text.length() <= 0)

    return;

  fwrite(text.data(), 1, text.length(), d_file);

  if (text[text.length()-1] != '\n')

    fwrite("\n", 1, 1, d_file);

  if (d_fd != -1)

    fflush(d_file);        // keep synced with any other users of fd

}

// ----------------------------------------------------------------

// static error handlers

//

class gr_silent_error_handler : public gr_base_error_handler

{

public:

  gr_silent_error_handler() {}

  void handle_text(seriousness s, const std::string &str);

};

void

gr_silent_error_handler::handle_text(seriousness s, const std::string &str)

{

  // nop

}

class force_init {

public:

  force_init()

  {

    s_default_handler = new gr_file_error_handler(stdout);

    s_silent_handler = new gr_silent_error_handler();

  }

};

static force_init        kludge;