src/Units/Descriptor.cpp

   1 /*
   2 Copyright_License {
   3
   4   XCSoar Glide Computer - http://www.xcsoar.org/
   5   Copyright (C) 2000-2013 The XCSoar Project
   6   A detailed list of copyright holders can be found in the file "AUTHORS".
   7
   8   This program is free software; you can redistribute it and/or
   9   modify it under the terms of the GNU General Public License
  10   as published by the Free Software Foundation; either version 2
  11   of the License, or (at your option) any later version.
  12
  13   This program is distributed in the hope that it will be useful,
  14   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16   GNU General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with this program; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  21 }
  22 */
  23
  24 #include "Units/Descriptor.hpp"
  25 #include "Units/Units.hpp"
  26 #include "Atmosphere/Temperature.hpp"
  27 #include "Util/Macros.hpp"
  28
  29 #include <stddef.h>
  30
  31 //SI to Local Units
  32
  33 const UnitDescriptor Units::unit_descriptors[] = {
  34   { nullptr, fixed(1), fixed(0) },
  35   { _T("km"), fixed(0.001), fixed(0) },
  36   { _T("NM"), fixed(0.000539956803), fixed(0) },
  37   { _T("mi"), fixed(0.000621371192), fixed(0) },
  38   { _T("km/h"), fixed(3.6), fixed(0) },
  39   { _T("kt"), fixed(1.94384449), fixed(0) },
  40   { _T("mph"), fixed(2.23693629), fixed(0) },
  41   { _T("m/s"), fixed(1), fixed(0) },
  42   { _T("fpm"), fixed(196.850394), fixed(0) },
  43   { _T("m"), fixed(1), fixed(0) },
  44   { _T("ft"), fixed(3.2808399), fixed(0) },
  45   { _T("FL"), fixed(0.032808399), fixed(0) },
  46   { _T("K"), fixed(1), fixed(0) },
  47   { _T(DEG)_T("C"), fixed(1), -CELSIUS_OFFSET },
  48   { _T(DEG)_T("F"), fixed(1.8), fixed(-459.67) },
  49   { _T("hPa"), fixed(1), fixed(0) },
  50   { _T("mb"), fixed(1), fixed(0) },
  51   { _T("mmHg"), fixed(0.7500616827041698), fixed(0) },
  52   { _T("inHg"), fixed(0.0295287441401431), fixed(0) },
  53 };
  54
  55 static_assert(ARRAY_SIZE(Units::unit_descriptors) == (size_t)Unit::COUNT,
  56               "number of unit descriptions does not match number of units");
  57
  58 const TCHAR *
  59 Units::GetUnitName(Unit unit)
  60 {
  61   const unsigned i = (unsigned)unit;
  62   assert(i < ARRAY_SIZE(unit_descriptors));
  63   assert(unit_descriptors[i].name != nullptr);
  64
  65   return unit_descriptors[i].name;
  66 }