30c8328399
- new private method FixesLoader::throwExceptionIfStreamError(); - call it whenever appropriate.
132 lines
3.8 KiB
C++
132 lines
3.8 KiB
C++
// fixlist.cxx -- fix list management class
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//
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// Written by Curtis Olson, started April 2000.
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//
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// Copyright (C) 2000 Curtis L. Olson - http://www.flightgear.org/~curt
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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// $Id$
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdlib.h> // atof()
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#include <algorithm>
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#include <string> // std::getline()
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#include <errno.h>
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#include <simgear/debug/logstream.hxx>
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#include <simgear/misc/sgstream.hxx>
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#include <simgear/misc/sg_path.hxx>
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#include <simgear/misc/strutils.hxx> // simgear::strutils::split()
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#include <simgear/math/sg_geodesy.hxx>
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#include <simgear/structure/exception.hxx>
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#include "fixlist.hxx"
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#include <Navaids/fix.hxx>
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#include <Navaids/NavDataCache.hxx>
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FGFix::FGFix(PositionedID aGuid, const std::string& aIdent, const SGGeod& aPos) :
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FGPositioned(aGuid, FIX, aIdent, aPos)
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{
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}
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namespace flightgear
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{
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const unsigned int LINES_IN_FIX_DAT = 119724;
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FixesLoader::FixesLoader() : _cache(NavDataCache::instance())
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{ }
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FixesLoader::~FixesLoader()
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{ }
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// Load fixes from the specified fix.dat (or fix.dat.gz) file
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void FixesLoader::loadFixes(const SGPath& path)
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{
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sg_gzifstream in( path );
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const std::string utf8path = path.utf8Str();
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if ( !in.is_open() ) {
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throw sg_io_exception("Cannot open file:", path);
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}
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// toss the first two lines of the file
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for (int i = 0; i < 2; i++) {
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in >> skipeol;
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throwExceptionIfStreamError(in, path);
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}
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unsigned int lineNumber = 3;
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// read in each remaining line of the file
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for (std::string line; std::getline(in, line); lineNumber++) {
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std::vector<std::string> fields = simgear::strutils::split(line);
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std::vector<std::string>::size_type nb_fields = fields.size();
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const std::string endOfData = "99"; // special code in the fix.dat spec
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double lat, lon;
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if (nb_fields == 0) { // blank line
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continue;
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} else if (nb_fields == 1) {
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if (fields[0] == endOfData)
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break;
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else {
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SG_LOG(SG_NAVAID, SG_WARN, utf8path << ": malformed line #" <<
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lineNumber << ": only one field, but it is not '99'");
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continue;
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}
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} else if (nb_fields != 3) {
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SG_LOG(SG_NAVAID, SG_WARN, utf8path << ": malformed line #" <<
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lineNumber << ": expected 3 fields, but got " << fields.size());
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continue;
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}
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lat = atof(fields[0].c_str());
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lon = atof(fields[1].c_str());
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_cache->insertFix(fields[2], SGGeod::fromDeg(lon, lat));
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if ((lineNumber % 100) == 0) {
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// every 100 lines
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unsigned int percent = (lineNumber * 100) / LINES_IN_FIX_DAT;
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_cache->setRebuildPhaseProgress(NavDataCache::REBUILD_FIXES, percent);
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}
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}
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throwExceptionIfStreamError(in, path);
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}
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void FixesLoader::throwExceptionIfStreamError(
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const sg_gzifstream& input_stream, const SGPath& path)
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{
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if (input_stream.bad()) {
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const std::string errMsg = simgear::strutils::error_string(errno);
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SG_LOG(SG_NAVAID, SG_ALERT,
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"Error while reading '" << path.utf8Str() << "': " << errMsg);
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throw sg_io_exception("Error reading file (" + errMsg + ")",
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sg_location(path));
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}
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}
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} // of namespace flightgear;
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