Streaming.h

/*
Streaming.h - Arduino library for supporting the << streaming operator
Copyright (c) 2010 Mikal Hart.  All rights reserved.

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library 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
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

#ifndef ARDUINO_STREAMING
#define ARDUINO_STREAMING

#include <Arduino.h>
#include "LOG.h"

#define __ST_LOG_LEVEL 3
static LOG _st_logme(__ST_LOG_LEVEL);

// Generic template
template<class T>
inline Print &operator <<(Print &stream, T arg)
{
     stream.print(arg);
     _st_logme.DATA(arg);
     return stream;
}

struct _BASED {
     long val;
     int base;
     _BASED(long v, int b): val(v), base(b)
     {}
};

#define _HEX(a)     _BASED(a, HEX)
#define _DEC(a)     _BASED(a, DEC)
#define _OCT(a)     _BASED(a, OCT)
#define _BIN(a)     _BASED(a, BIN)

// Specialization for class _BASED
// Thanks to Arduino forum user Ben Combee who suggested this
// clever technique to allow for expressions like
//   Serial << _HEX(a);

inline Print &operator <<(Print &obj, const _BASED &arg)
{
     obj.print(arg.val);
     return obj;
}

#if ARDUINO >= 18
// Specialization for class _FLOAT
// Thanks to Michael Margolis for suggesting a way
// to accommodate Arduino 0018's floating point precision
// feature like this:
//   Serial << _FLOAT(gps_latitude, 6); // 6 digits of precision

struct _FLOAT {
     float val;
     int digits;
     _FLOAT(double v, int d): val(v), digits(d)
     {}
};

inline Print &operator <<(Print &obj, const _FLOAT &arg)
{
     obj.print(arg.val, arg.digits);
     return obj;
}
#endif

// Specialization for enum _EndLineCode
// Thanks to Arduino forum user Paul V. who suggested this
// clever technique to allow for expressions like
//   Serial << "Hello!" << endl;

enum _EndLineCode { endl };

inline Print &operator <<(Print &obj, _EndLineCode arg)
{
     obj.println();
     return obj;
}

#endif