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

/*

 * Copyright 2003,2010,2011 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_preferences.h>

#include <gr_sys_paths.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <unistd.h>

#include <string.h>

#include <boost/filesystem/operations.hpp>

#include <boost/filesystem/path.hpp>

namespace fs = boost::filesystem;

/*

 * The simplest thing that could possibly work:

 *  the key is the filename; the value is the file contents.

 */

static const char *

pathname (const char *key)

{

  static fs::path path;

  path = fs::path(gr_appdata_path()) / ".gnuradio" / "prefs" / key;

  return path.string().c_str();

}

static void

ensure_dir_path ()

{

  fs::path path = fs::path(gr_appdata_path()) / ".gnuradio";

  if (!fs::is_directory(path)) fs::create_directory(path);

  path = path / "prefs";

  if (!fs::is_directory(path)) fs::create_directory(path);

}

const char *

gr_preferences::get (const char *key)

{

  static char buf[1024];

  FILE         *fp = fopen (pathname (key), "r");

  if (fp == 0) {

    perror (pathname (key));

    return 0;

  }

  memset (buf, 0, sizeof (buf));

  size_t ret = fread (buf, 1, sizeof (buf) - 1, fp);

  if(ret == 0) {

    if(ferror(fp) != 0) {

      perror (pathname (key));

      fclose (fp);

      return 0;

    }

  }

  fclose (fp);

  return buf;

}

void 

gr_preferences::set (const char *key, const char *value)

{

  ensure_dir_path ();

  FILE *fp = fopen (pathname (key), "w");

  if (fp == 0){

    perror (pathname (key));

    return;

  }

  size_t ret = fwrite (value, 1, strlen (value), fp);

  if(ret == 0) {

    if(ferror(fp) != 0) {

      perror (pathname (key));

      fclose (fp);

      return;

    }

  }

  fclose (fp);

};