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/*
* Copyright (C) 2006-2011 David Robillard <d@drobilla.net>
* Copyright (C) 2007-2011 Carl Hetherington <carl@carlh.net>
* Copyright (C) 2007-2015 Paul Davis <paul@linuxaudiosystems.com>
*
* 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; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef __ardour_data_type_h__
#define __ardour_data_type_h__
#include <string>
#include <stdint.h>
#include <glib.h>
#include "ardour/libardour_visibility.h"
namespace ARDOUR {
/** A type of Data Ardour is capable of processing.
*
* The majority of this class is dedicated to conversion to and from various
* other type representations, simple comparison between then, etc. This code
* is deliberately 'ugly' so other code doesn't have to be.
*/
class LIBARDOUR_API DataType
{
public:
/** Numeric symbol for this DataType.
*
* Castable to int for use as an array index (e.g. by ChanCount).
* Note this means NIL is (ntypes-1) and guaranteed to change when
* types are added, so this number is NOT suitable for serialization,
* network, or binary anything.
*
* Some heuristics in Ardour's UI assume that the DataTypes are ordered
* from most to least likely to be the main intended type of a route.
*
* WARNING: The number of non-NIL entries here must match num_types.
*/
enum Symbol {
AUDIO = 0,
MIDI = 1,
NIL = 2,
};
/** Number of types (not including NIL).
* WARNING: make sure this matches Symbol!
*/
static const uint32_t num_types = 2;
DataType(const Symbol& symbol)
: _symbol(symbol)
{}
static DataType front() { return DataType((Symbol) 0); }
/** Construct from a string (Used for loading from XML and Ports)
* The string can be as in an XML file (eg "audio" or "midi"), or a
*/
DataType(const std::string& str)
: _symbol(NIL) {
if (!g_ascii_strncasecmp(str.c_str(), "audio", str.length())) {
_symbol = AUDIO;
} else if (!g_ascii_strncasecmp(str.c_str(), "midi", str.length())) {
_symbol = MIDI;
}
}
/** Inverse of the from-string constructor */
const char* to_string() const {
switch (_symbol) {
case AUDIO: return "audio";
case MIDI: return "midi";
default: return "unknown"; // reeeally shouldn't ever happen
}
}
const char* to_i18n_string () const;
inline operator uint32_t() const { return (uint32_t)_symbol; }
/** DataType iterator, for writing generic loops that iterate over all
* available types.
*/
class iterator {
public:
iterator(uint32_t index) : _index(index) {}
DataType operator*() { return DataType((Symbol)_index); }
iterator& operator++() { ++_index; return *this; } // yes, prefix only
bool operator==(const iterator& other) { return (_index == other._index); }
bool operator!=(const iterator& other) { return (_index != other._index); }
private:
friend class DataType;
uint32_t _index;
};
static iterator begin() { return iterator(0); }
static iterator end() { return iterator(num_types); }
bool operator==(const Symbol symbol) { return (_symbol == symbol); }
bool operator!=(const Symbol symbol) { return (_symbol != symbol); }
bool operator==(const DataType other) { return (_symbol == other._symbol); }
bool operator!=(const DataType other) { return (_symbol != other._symbol); }
private:
Symbol _symbol; // could be const if not for the string constructor
};
} // namespace ARDOUR
#endif // __ardour_data_type_h__
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