aboutsummaryrefslogtreecommitdiffstats
path: root/lib/osmosdr_arg_helpers.h
blob: 2261524bd0986dcd394d0ad576d97a8b8f2c4cf6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
/* -*- c++ -*- */
/*
 * Copyright 2012 Dimitri Stolnikov <horiz0n@gmx.net>
 *
 * 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.
 */

#ifndef OSMOSDR_ARG_HELPERS_H
#define OSMOSDR_ARG_HELPERS_H

#include <iostream>
#include <vector>
#include <map>

#include <gr_io_signature.h>

#include <boost/lexical_cast.hpp>
#include <boost/tokenizer.hpp>
#include <boost/foreach.hpp>

typedef std::map< std::string, std::string > dict_t;
typedef std::pair< std::string, std::string > pair_t;

inline std::vector< std::string > args_to_vector( const std::string &args )
{
  std::vector< std::string > result;

  boost::escaped_list_separator<char> separator("\\", " ", "'");
  typedef boost::tokenizer< boost::escaped_list_separator<char> > tokenizer_t;
  tokenizer_t tokens(args, separator);

  BOOST_FOREACH(std::string token, tokens)
    result.push_back(token);

  return result;
}

inline std::vector< std::string > params_to_vector( const std::string &params )
{
  std::vector< std::string > result;

  boost::escaped_list_separator<char> separator("\\", ",", "'");
  typedef boost::tokenizer< boost::escaped_list_separator<char> > tokenizer_t;
  tokenizer_t tokens(params, separator);

  BOOST_FOREACH(std::string token, tokens)
    result.push_back(token);

  return result;
}

inline pair_t param_to_pair( const std::string &param )
{
  pair_t result;

  std::size_t pos = param.find('=');
  if(pos != std::string::npos)
  {
    result.first = param.substr(0, pos);
    result.second = param.substr(pos + 1);
  }
  else
  {
    result.first = param;
    result.second = "";
  }

  return result;
}

inline dict_t params_to_dict( const std::string &params )
{
  dict_t result;

  std::vector< std::string > param_list = params_to_vector( params );
  BOOST_FOREACH(std::string param, param_list)
  {
    pair_t pair = param_to_pair( param );
    std::string value = pair.second;
    if (value.length() && value[0] == '\'' && value[ value.length() - 1 ] == '\'')
      value = value.substr(1, value.length() - 1);
    result[ pair.first ] = value;
  }

  return result;
}

struct is_nchan_argument
{
  bool operator ()(const std::string &str)
  {
    return str.find("nchan=") == 0;
  }
};

inline gr_io_signature_sptr args_to_io_signature( const std::string &args )
{
  size_t max_nchan = 0;
  size_t dev_nchan = 0;
  std::vector< std::string > arg_list = args_to_vector( args );

  BOOST_FOREACH( std::string arg, arg_list )
  {
    if ( arg.find( "nchan=" ) == 0 ) // try to parse global nchan value
    {
      pair_t pair = param_to_pair( arg );
      max_nchan = boost::lexical_cast<size_t>( pair.second );
    }
  }

  arg_list.erase( std::remove_if( // remove any global nchan tokens
                    arg_list.begin(),
                    arg_list.end(),
                    is_nchan_argument() ),
                  arg_list.end() );

  // try to parse device specific nchan values, assume 1 channel if none given

  BOOST_FOREACH( std::string arg, arg_list )
  {
    dict_t dict = params_to_dict(arg);
    if (dict.count("nchan"))
    {
      dev_nchan += boost::lexical_cast<size_t>( dict["nchan"] );
    }
    else // no channels given via args
    {
      dev_nchan++; // assume one channel
    }
  }

  // if at least one nchan was given, perform a sanity check
  if ( max_nchan && dev_nchan && max_nchan != dev_nchan )
    throw std::runtime_error("Wrong device arguments specified. Missing nchan?");

  const size_t nchan = std::max<size_t>(dev_nchan, 1); // assume at least one
  return gr_make_io_signature(nchan, nchan, sizeof(gr_complex));
}

#endif // OSMOSDR_ARG_HELPERS_H