src/RadioFrequency.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 "RadioFrequency.hpp"
  25 #include "Util/StringUtil.hpp"
  26 #include "Util/NumberParser.hpp"
  27
  28 TCHAR *
  29 RadioFrequency::Format(TCHAR *buffer, size_t max_size) const
  30 {
  31   if (!IsDefined())
  32     return NULL;
  33
  34   unsigned khz = GetKiloHertz();
  35   unsigned mhz = khz / 1000;
  36   khz %= 1000;
  37
  38   StringFormat(buffer, max_size, _T("%u.%03u"), mhz, khz);
  39   return buffer;
  40 }
  41
  42 RadioFrequency
  43 RadioFrequency::Parse(const TCHAR *p)
  44 {
  45   TCHAR *endptr;
  46   double mhz = ParseDouble(p, &endptr);
  47
  48   RadioFrequency frequency;
  49   if (mhz < 100 || *endptr != _T('\0'))
  50     frequency.Clear();
  51   else
  52     frequency.SetKiloHertz((unsigned)(mhz * 1000 + 0.5));
  53   return frequency;
  54 }