Added missing files

git-svn-id: http://svn.drobilla.net/lad/ingen@132 a436a847-0d15-0410-975c-d299462d15a1

1 files changed, 123 insertions, 0 deletions

diff --git a/src/common/util/Atom.h b/src/common/util/Atom.h
new file mode 100644
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--- /dev/null
+++ b/src/common/util/Atom.h
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+/* This file is part of Ingen.  Copyright (C) 2006 Dave Robillard.
+ * 
+ * Ingen 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.
+ * 
+ * Ingen 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 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 St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef ATOM_H
+#define ATOM_H
+
+#include <cassert>
+#include <cstring>
+#include <lo/lo.h>
+
+
+/** An OSC atom (fundamental data types OSC messages are composed of).
+ */
+class Atom {
+public:
+	enum Type {
+		NIL,
+		INT,
+		FLOAT,
+		STRING,
+		BLOB
+	};
+
+	Atom()                : _type(NIL),    _blob_val(0)             {}
+	Atom(int32_t val)     : _type(INT),    _int_val(val)            {}
+	Atom(float val)       : _type(FLOAT),  _float_val(val)          {}
+	Atom(const char* val) : _type(STRING), _string_val(strdup(val)) {}
+
+	Atom(void* val) : _type(BLOB), _blob_size(sizeof(val)), _blob_val(malloc(_blob_size))
+	{ memcpy(_blob_val, val, sizeof(_blob_size)); }
+
+	~Atom()
+	{
+		if (_type == STRING)
+			free(_string_val);
+		else if (_type == BLOB)
+			free(_blob_val);
+	}
+
+	// Gotta love C++ boilerplate:
+	
+	Atom(const Atom& copy)
+	: _type(copy._type)
+	, _blob_size(copy._blob_size)
+	{
+		switch (_type) {
+		case NIL:    _blob_val   = 0;                        break;
+		case INT:    _int_val    = copy._int_val;            break;
+		case FLOAT:  _float_val  = copy._float_val;          break;
+		case STRING: _string_val = strdup(copy._string_val); break;
+
+		case BLOB:   _blob_val = malloc(_blob_size);
+		             memcpy(_blob_val, copy._blob_val, _blob_size);
+					 break;
+
+		default: break;
+		}
+	}
+	
+	Atom& operator=(const Atom& other)
+	{
+		if (_type == BLOB)
+			free(_blob_val);
+		else if (_type == STRING)
+			free(_string_val);
+
+		_type = other._type;
+		_blob_size = other._blob_size;
+
+		switch (_type) {
+		case NIL:    _blob_val   = 0;                         break;
+		case INT:    _int_val    = other._int_val;            break;
+		case FLOAT:  _float_val  = other._float_val;          break;
+		case STRING: _string_val = strdup(other._string_val); break;
+
+		case BLOB:   _blob_val = malloc(_blob_size);
+		             memcpy(_blob_val, other._blob_val, _blob_size);
+					 break;
+
+		default: break;
+		}
+		return *this;
+	}
+
+	/** Type of this atom.  Always check this before attempting to get the
+	 * value - attempting to get the incorrectly typed value is a fatal error.
+	 */
+	Type type() const { return _type; }
+
+	inline int32_t     get_int32()  const { assert(_type == INT);    return _int_val; }
+	inline float       get_float()  const { assert(_type == FLOAT);  return _float_val; }
+	inline const char* get_string() const { assert(_type == STRING); return _string_val; }
+	inline const void* get_blob()   const { assert(_type == BLOB);   return _blob_val; }
+
+	inline operator bool() const { return (_type != NIL); }
+
+private:
+	Type _type;
+	
+	size_t _blob_size; ///< always a multiple of 32
+	
+	union {
+		int32_t _int_val;
+		float   _float_val;
+		char*   _string_val;
+		void*   _blob_val;
+	};
+};
+
+#endif // ATOM_H