src/Waypoint/WaypointReaderOzi.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 "WaypointReaderOzi.hpp"
  25 #include "Waypoint/Waypoints.hpp"
  26 #include "IO/LineReader.hpp"
  27 #include "Units/System.hpp"
  28 #include "Util/Macros.hpp"
  29
  30 #include <stdio.h>
  31
  32 static bool
  33 ParseAngle(const TCHAR *src, Angle &angle)
  34 {
  35   TCHAR *endptr;
  36   double deg = _tcstod(src, &endptr);
  37   if (endptr == src)
  38     return false;
  39
  40   angle = Angle::Degrees(deg);
  41   return true;
  42 }
  43
  44 static bool
  45 ParseNumber(const TCHAR *src, long &dest)
  46 {
  47   TCHAR *endptr;
  48   long temp = _tcstol(src, &endptr, 10);
  49   if (endptr == src)
  50     return false;
  51
  52   dest = temp;
  53   return true;
  54 }
  55
  56 static bool
  57 ParseString(const TCHAR *src, tstring &dest)
  58 {
  59   if (src[0] == 0)
  60     return true;
  61
  62   dest.assign(src);
  63   trim_inplace(dest);
  64
  65   return true;
  66 }
  67
  68 bool
  69 WaypointReaderOzi::ParseLine(const TCHAR* line, const unsigned linenum,
  70                               Waypoints &way_points)
  71 {
  72   if (line[0] == '\0')
  73     return true;
  74
  75   // Ignore first four header lines
  76   if (linenum < 4)
  77     return true;
  78
  79   TCHAR ctemp[255];
  80   const TCHAR *params[20];
  81   static const unsigned int max_params = ARRAY_SIZE(params);
  82   size_t n_params;
  83
  84   if (_tcslen(line) >= ARRAY_SIZE(ctemp))
  85     /* line too long for buffer */
  86     return false;
  87
  88   // Get fields
  89   n_params = ExtractParameters(line, ctemp, params, max_params, true, _T('"'));
  90
  91   // Check if the basic fields are provided
  92   if (n_params < 15)
  93     return false;
  94
  95   GeoPoint location;
  96   // Latitude (e.g. 5115.900N)
  97   if (!ParseAngle(params[2], location.latitude))
  98     return false;
  99
 100   // Longitude (e.g. 00715.900W)
 101   if (!ParseAngle(params[3], location.longitude))
 102     return false;
 103
 104   location.Normalize(); // ensure longitude is within -180:180
 105
 106   Waypoint new_waypoint(location);
 107   new_waypoint.file_num = file_num;
 108
 109   long value;
 110   new_waypoint.original_id = (ParseNumber(params[0], value) ? value : 0);
 111
 112   if (!ParseString(params[1], new_waypoint.name))
 113     return false;
 114
 115   if (ParseNumber(params[14], value) && value != -777)
 116     new_waypoint.elevation = Units::ToSysUnit(fixed(value), Unit::FEET);
 117   else if (!CheckAltitude(new_waypoint))
 118     return false;
 119
 120   // Description (Characters 35-44)
 121   ParseString(params[11], new_waypoint.comment);
 122
 123   way_points.Append(std::move(new_waypoint));
 124   return true;
 125 }
 126
 127 bool
 128 WaypointReaderOzi::VerifyFormat(TLineReader &reader)
 129 {
 130   const TCHAR *line = reader.ReadLine();
 131   if (line == NULL)
 132     return false;
 133
 134   return StringStartsWith(line, _T("OziExplorer Waypoint File"));
 135 }