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       1             : #ifndef _ATM_LENGTH_H
       2             : #define _ATM_LENGTH_H
       3             : /*******************************************************************************
       4             :  * ALMA - Atacama Large Millimiter Array
       5             :  * (c) Instituto de Estructura de la Materia, 2009
       6             :  *
       7             :  * This library is free software; you can redistribute it and/or
       8             :  * modify it under the terms of the GNU Lesser General Public
       9             :  * License as published by the Free Software Foundation; either
      10             :  * version 2.1 of the License, or (at your option) any later version.
      11             :  *
      12             :  * This library is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :  * Lesser General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU Lesser General Public
      18             :  * License along with this library; if not, write to the Free Software
      19             :  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
      20             :  *
      21             :  * "@(#) $Id: ATMLength.h Exp $"
      22             :  *
      23             :  * who       when      what
      24             :  * --------  --------  ----------------------------------------------
      25             :  * pardo     24/03/09  created
      26             :  */
      27             : 
      28             : #ifndef __cplusplus
      29             : #error "This is a C++ include file and cannot be used from plain C"
      30             : #endif
      31             : 
      32             : #include "ATMCommon.h"
      33             : #include <string>
      34             : 
      35             : 
      36             : 
      37             : ATM_NAMESPACE_BEGIN
      38             : 
      39             : /*! \brief Class for those physical parameters having dimensions of Length [L]
      40             :  *
      41             :  *   This class is defined for those physical parameters that have units of Length, for example
      42             :  *   the water vapor scale height. Default units are m (International System).
      43             :  */
      44             : class Length
      45             : {
      46             : public:
      47             :   enum Units {
      48             :     UnitKiloMeter,
      49             :     UnitMeter,
      50             :     UnitMilliMeter,
      51             :     UnitMicron,
      52             :     UnitMicrons,
      53             :     UnitNanoMeter,
      54             :     NumLengthUnits
      55             :   };
      56             : 
      57             :   /** Default constructor: Length value set to 0 m */
      58             :   Length();
      59             :   /** A full constructor: value in default units (m) */
      60             :   Length(double length);
      61             :   /** A full constructor: value + units. Valid units are:  km [KM], m [M], mm [MM], micron [MICRON], nm [NM]. */
      62             :   Length(double length, const std::string &units);
      63             :   Length(double length, Units units);
      64             :   /** Copy constructor */
      65             :   Length(const Length &length);
      66             : 
      67             :   /** Destructor */
      68             :   virtual ~Length();
      69             : 
      70             :   /** Accessor to get the numerical value of length (in International System units: m) */
      71   489655707 :   inline double get() const { return valueIS_; }
      72             :   /** Accessor to the length value in specified units. Implemented units are km [KM], m [M], mm [MM], micron [MICRON], nm [NM].
      73             :    *  If none of these implemented units is given, the SI value will be returned. */
      74             :   inline double get(const std::string &units) const { return sget(valueIS_, units); }
      75       19823 :   inline double get(const Units units) const { return sget(valueIS_, units); }
      76             :   /** Accessor to the length in specified units as a formatted std::string.
      77             :    *  Implemented units are km [KM], m [M], mm [MM], micron [MICRON], nm [NM].
      78             :    *  If none of these implemented units is given, the SI value will be returned. */
      79             :   std::string get(const std::string &form, const std::string &units) const;
      80             : 
      81             :   /** Operator "equal to a Length" */
      82       19380 :   inline Length& operator=(const Length &rhs) { if(&rhs != this) valueIS_ = rhs.valueIS_; return *this; }
      83             :   /** Operator "equal to a double converted to Length in m" */
      84             :   inline Length& operator=(double rhs) { valueIS_ = rhs; return *this; }
      85             :   /** Operator "addition of lengths" */
      86           0 :   inline Length operator+(const Length &rhs) { return Length(valueIS_ + rhs.get()); }
      87             :   /** Operator "substraction of lengths" */
      88           0 :   inline Length operator-(const Length &rhs) { return Length(valueIS_ - rhs.get()); }
      89             :   /** Operator "multiplication of a length by a double" */
      90             :   inline Length operator*(double scf) { return Length(valueIS_ * scf); }
      91             :   /** Operator "multiplication of a length by a float" */
      92             :   inline Length operator*(float scf) { return Length(valueIS_ * (double) scf); }
      93             :   /** Operator "multiplication of a length by an int" */
      94             :   inline Length operator*(int scf) { return Length(valueIS_ * (double) scf); }
      95             :   /** Operator "multiplication of a length by an unsigned int" */
      96             :   inline Length operator*(unsigned int scf) { return Length(valueIS_ * (double) scf); }
      97             :   /** Operator "division of a length by a double" */
      98             :   inline Length operator/(double scf) { return Length(valueIS_ / scf); }
      99             :   /** Operator "division of a length by a float" */
     100             :   inline Length operator/(float scf) { return Length(valueIS_ / (double) scf); }
     101             :   /** Operator "division of a length by an int" */
     102             :   inline Length operator/(int scf) { return Length(valueIS_ / (double) scf); }
     103             :   /** Operator "division of a length by an unsigned int" */
     104             :   inline Length operator/(unsigned int scf) { return Length(valueIS_ / (double) scf); }
     105             :   /** Operator "comparator < for two lengths" */
     106             :   inline bool operator<(const Length &rhs) const { return (valueIS_ < rhs.get()); }
     107             :   /** Operator "comparator > for two lengths" */
     108             :   inline bool operator>(const Length &rhs) const { return (valueIS_ > rhs.get()); }
     109             :   /** Operator "comparator <= for two lengths" */
     110           0 :   inline bool operator<=(const Length &rhs) const { return (valueIS_ <= rhs.get()); }
     111             :   /** Operator "comparator >= for two lengths" */
     112             :   inline bool operator>=(const Length &rhs) const { return (valueIS_ >= rhs.get()); }
     113             :   /** Operator "comparator == for two lengths" */
     114             :   inline bool operator==(const Length &rhs) const { return (valueIS_ == rhs.get()); }
     115             :   /** Operator "comparator != for two lengths" */
     116             :   inline bool operator!=(const Length &rhs) const { return (valueIS_ != rhs.get()); }
     117             : 
     118             : private:
     119             :   static double sget(double value, const std::string &units);
     120             :   static double sput(double value, const std::string &units);
     121             :   static double sget(double value, Units units);
     122             :   static double sput(double value, Units units);
     123             : 
     124             : private:
     125             :   double valueIS_;
     126             : }; // class Length
     127             : 
     128             : ATM_NAMESPACE_END
     129             : 
     130             : #endif /*!_ATM_LENGTH_H*/