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flightgear/src/Navaids/NavDataCache.cxx
James Turner 9b900e9430 Implement a persistent cache for navigation data. 
Cache the parsed navigation and airport data in a binary file to reduce
startup times and memory consumption (since only referenced FGPositioned
elements are held in memory).

Data will be reimported when the mod-time of any input file is changed.
If a global file is changed (nav.dat, awy.dat, apt.dat, etc), the cache
will be completely rebuilt, which takes approximately 30 seconds on
moderate hardware. (Future work may reduce this).
2012-09-19 11:38:19 +01:00

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// NavDataCache.cxx - defines a unified binary cache for navigation
// data, parsed from various text / XML sources.
// Written by James Turner, started 2012.
//
// Copyright (C) 2012 James Turner
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
// to ensure compatability between sqlite3_int64 and PositionedID,
// force the type used by sqlite to match PositionedID explicitly
#define SQLITE_INT64_TYPE int64_t
#define SQLITE_UINT64_TYPE uint64_t
#include "NavDataCache.hxx"
// std
#include <map>
#include <cassert>
#include <stdint.h> // for int64_t
// boost
#include <boost/foreach.hpp>
#include "sqlite3.h"
// SimGear
#include <simgear/structure/exception.hxx>
#include <simgear/debug/logstream.hxx>
#include <simgear/bucket/newbucket.hxx>
#include <simgear/misc/sg_path.hxx>
#include <simgear/misc/strutils.hxx>
#include <Main/globals.hxx>
#include "markerbeacon.hxx"
#include "navrecord.hxx"
#include <Airports/simple.hxx>
#include <Airports/runways.hxx>
#include <ATC/CommStation.hxx>
#include "fix.hxx"
#include <Navaids/fixlist.hxx>
#include <Navaids/navdb.hxx>
#include "PositionedOctree.hxx"
#include <Airports/apt_loader.hxx>
#include <Navaids/airways.hxx>
using std::string;
#define SG_NAVCACHE SG_GENERAL
//#define LAZY_OCTREE_UPDATES 1
namespace {
const int SCHEMA_VERSION = 3;
// bind a std::string to a sqlite statement. The std::string must live the
// entire duration of the statement execution - do not pass a temporary
// std::string, or the compiler may delete it, freeing the C-string storage,
// and causing subtle memory corruption bugs!
void sqlite_bind_stdstring(sqlite3_stmt* stmt, int value, const std::string& s)
{
sqlite3_bind_text(stmt, value, s.c_str(), s.length(), SQLITE_STATIC);
}
// variant of the above, which does not care about the lifetime of the
// passed std::string
void sqlite_bind_temp_stdstring(sqlite3_stmt* stmt, int value, const std::string& s)
{
sqlite3_bind_text(stmt, value, s.c_str(), s.length(), SQLITE_TRANSIENT);
}
typedef sqlite3_stmt* sqlite3_stmt_ptr;
void f_distanceCartSqrFunction(sqlite3_context* ctx, int argc, sqlite3_value* argv[])
{
if (argc != 6) {
return;
}
SGVec3d posA(sqlite3_value_double(argv[0]),
sqlite3_value_double(argv[1]),
sqlite3_value_double(argv[2]));
SGVec3d posB(sqlite3_value_double(argv[3]),
sqlite3_value_double(argv[4]),
sqlite3_value_double(argv[5]));
sqlite3_result_double(ctx, distSqr(posA, posB));
}
static string cleanRunwayNo(const string& aRwyNo)
{
if (aRwyNo[0] == 'x') {
return string(); // no ident for taxiways
}
string result(aRwyNo);
// canonicalise runway ident
if ((aRwyNo.size() == 1) || !isdigit(aRwyNo[1])) {
result = "0" + aRwyNo;
}
// trim off trailing garbage
if (result.size() > 2) {
char suffix = toupper(result[2]);
if (suffix == 'X') {
result = result.substr(0, 2);
}
}
return result;
}
} // anonymous namespace
namespace flightgear
{
typedef std::map<PositionedID, FGPositionedRef> PositionedCache;
class AirportTower : public FGPositioned
{
public:
AirportTower(PositionedID& guid, PositionedID airport,
const string& ident, const SGGeod& pos) :
FGPositioned(guid, FGPositioned::TOWER, ident, pos)
{
}
};
class NavDataCache::NavDataCachePrivate
{
public:
NavDataCachePrivate(const SGPath& p, NavDataCache* o) :
outer(o),
db(NULL),
path(p),
cacheHits(0),
cacheMisses(0)
{
}
~NavDataCachePrivate()
{
BOOST_FOREACH(sqlite3_stmt_ptr stmt, prepared) {
sqlite3_finalize(stmt);
}
prepared.clear();
sqlite3_close(db);
}
void init()
{
SG_LOG(SG_NAVCACHE, SG_INFO, "NavCache at:" << path);
sqlite3_open_v2(path.c_str(), &db,
SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, NULL);
sqlite3_stmt_ptr checkTables =
prepare("SELECT count(*) FROM sqlite_master WHERE name='properties'");
sqlite3_create_function(db, "distanceCartSqr", 6, SQLITE_ANY, NULL,
f_distanceCartSqrFunction, NULL, NULL);
execSelect(checkTables);
bool didCreate = false;
if (sqlite3_column_int(checkTables, 0) == 0) {
SG_LOG(SG_NAVCACHE, SG_INFO, "will create tables");
initTables();
didCreate = true;
}
readPropertyQuery = prepare("SELECT value FROM properties WHERE key=?");
writePropertyQuery = prepare("INSERT OR REPLACE INTO properties "
"(key, value) VALUES (?,?)");
if (didCreate) {
writeIntProperty("schema-version", SCHEMA_VERSION);
} else {
int schemaVersion = outer->readIntProperty("schema-version");
if (schemaVersion != SCHEMA_VERSION) {
SG_LOG(SG_NAVCACHE, SG_INFO, "Navcache schema mismatch, will rebuild");
throw sg_exception("Navcache schema has changed");
}
}
prepareQueries();
}
void checkCacheFile()
{
SG_LOG(SG_NAVCACHE, SG_INFO, "running DB integrity check");
SGTimeStamp st;
st.stamp();
sqlite3_stmt_ptr stmt = prepare("PRAGMA integrity_check(1)");
if (!execSelect(stmt)) {
throw sg_exception("DB integrity check failed to run");
}
string v = (char*) sqlite3_column_text(stmt, 0);
if (v != "ok") {
throw sg_exception("DB integrity check returned:" + v);
}
SG_LOG(SG_NAVCACHE, SG_INFO, "NavDataCache integrity check took:" << st.elapsedMSec());
finalize(stmt);
}
void callSqlite(int result, const string& sql)
{
if (result == SQLITE_OK)
return; // all good
string errMsg;
if (result == SQLITE_MISUSE) {
errMsg = "Sqlite API abuse";
SG_LOG(SG_NAVCACHE, SG_ALERT, "Sqlite API abuse");
} else {
errMsg = sqlite3_errmsg(db);
SG_LOG(SG_NAVCACHE, SG_ALERT, "Sqlite error:" << errMsg << " running:\n\t" << sql);
}
throw sg_exception("Sqlite error:" + errMsg, sql);
}
void runSQL(const string& sql)
{
sqlite3_stmt_ptr stmt;
callSqlite(sqlite3_prepare_v2(db, sql.c_str(), sql.length(), &stmt, NULL), sql);
try {
execSelect(stmt);
} catch (sg_exception& e) {
sqlite3_finalize(stmt);
throw; // re-throw
}
sqlite3_finalize(stmt);
}
sqlite3_stmt_ptr prepare(const string& sql)
{
sqlite3_stmt_ptr stmt;
callSqlite(sqlite3_prepare_v2(db, sql.c_str(), sql.length(), &stmt, NULL), sql);
prepared.push_back(stmt);
return stmt;
}
void finalize(sqlite3_stmt_ptr s)
{
StmtVec::iterator it = std::find(prepared.begin(), prepared.end(), s);
if (it == prepared.end()) {
throw sg_exception("Finalising statement that was not prepared");
}
prepared.erase(it);
sqlite3_finalize(s);
}
void reset(sqlite3_stmt_ptr stmt)
{
assert(stmt);
if (sqlite3_reset(stmt) != SQLITE_OK) {
string errMsg = sqlite3_errmsg(db);
SG_LOG(SG_NAVCACHE, SG_ALERT, "Sqlite error resetting:" << errMsg);
throw sg_exception("Sqlite error resetting:" + errMsg, sqlite3_sql(stmt));
}
}
bool execSelect(sqlite3_stmt_ptr stmt)
{
return stepSelect(stmt);
}
bool stepSelect(sqlite3_stmt_ptr stmt)
{
int result = sqlite3_step(stmt);
if (result == SQLITE_ROW) {
return true; // at least one result row
}
if (result == SQLITE_DONE) {
return false; // no result rows
}
string errMsg;
if (result == SQLITE_MISUSE) {
errMsg = "Sqlite API abuse";
SG_LOG(SG_NAVCACHE, SG_ALERT, "Sqlite API abuse");
} else {
errMsg = sqlite3_errmsg(db);
SG_LOG(SG_NAVCACHE, SG_ALERT, "Sqlite error:" << errMsg
<< " while running:\n\t" << sqlite3_sql(stmt));
}
throw sg_exception("Sqlite error:" + errMsg, sqlite3_sql(stmt));
}
void execSelect1(sqlite3_stmt_ptr stmt)
{
if (!execSelect(stmt)) {
SG_LOG(SG_NAVCACHE, SG_WARN, "empty SELECT running:\n\t" << sqlite3_sql(stmt));
throw sg_exception("no results returned for select", sqlite3_sql(stmt));
}
}
sqlite3_int64 execInsert(sqlite3_stmt_ptr stmt)
{
execSelect(stmt);
return sqlite3_last_insert_rowid(db);
}
void execUpdate(sqlite3_stmt_ptr stmt)
{
execSelect(stmt);
}
void initTables()
{
runSQL("CREATE TABLE properties ("
"key VARCHAR,"
"value VARCHAR"
")");
runSQL("CREATE TABLE stat_cache ("
"path VARCHAR unique,"
"stamp INT"
")");
runSQL("CREATE TABLE positioned ("
"type INT,"
"ident VARCHAR collate nocase,"
"name VARCHAR collate nocase,"
"airport INT64,"
"lon FLOAT,"
"lat FLOAT,"
"elev_m FLOAT,"
"octree_node INT,"
"cart_x FLOAT,"
"cart_y FLOAT,"
"cart_z FLOAT"
")");
runSQL("CREATE INDEX pos_octree ON positioned(octree_node)");
runSQL("CREATE INDEX pos_ident ON positioned(ident collate nocase)");
runSQL("CREATE INDEX pos_name ON positioned(name collate nocase)");
// allow efficient querying of 'all ATIS at this airport' or
// 'all towers at this airport'
runSQL("CREATE INDEX pos_apt_type ON positioned(airport, type)");
runSQL("CREATE TABLE airport ("
"has_metar BOOL"
")"
);
runSQL("CREATE TABLE comm ("
"freq_khz INT,"
"range_nm INT"
")"
);
runSQL("CREATE INDEX comm_freq ON comm(freq_khz)");
runSQL("CREATE TABLE runway ("
"heading FLOAT,"
"length_ft FLOAT,"
"width_m FLOAT,"
"surface INT,"
"displaced_threshold FLOAT,"
"stopway FLOAT,"
"reciprocal INT64,"
"ils INT64"
")"
);
runSQL("CREATE TABLE navaid ("
"freq INT,"
"range_nm INT,"
"multiuse FLOAT,"
"runway INT64,"
"colocated INT64"
")"
);
runSQL("CREATE INDEX navaid_freq ON navaid(freq)");
runSQL("CREATE TABLE octree (children INT)");
runSQL("CREATE TABLE airway ("
"ident VARCHAR collate nocase,"
"network INT" // high-level or low-level
")");
runSQL("CREATE INDEX airway_ident ON airway(ident)");
runSQL("CREATE TABLE airway_edge ("
"network INT,"
"airway INT64,"
"a INT64,"
"b INT64"
")");
runSQL("CREATE INDEX airway_edge_from ON airway_edge(a)");
}
void prepareQueries()
{
#define POSITIONED_COLS "rowid, type, ident, name, airport, lon, lat, elev_m, octree_node"
#define AND_TYPED "AND type>=?2 AND type <=?3"
statCacheCheck = prepare("SELECT stamp FROM stat_cache WHERE path=?");
stampFileCache = prepare("INSERT OR REPLACE INTO stat_cache "
"(path, stamp) VALUES (?,?)");
loadPositioned = prepare("SELECT " POSITIONED_COLS " FROM positioned WHERE rowid=?");
loadAirportStmt = prepare("SELECT has_metar FROM airport WHERE rowid=?");
loadNavaid = prepare("SELECT range_nm, freq, multiuse, runway, colocated FROM navaid WHERE rowid=?");
loadCommStation = prepare("SELECT freq_khz, range_nm FROM comm WHERE rowid=?");
loadRunwayStmt = prepare("SELECT heading, length_ft, width_m, surface, displaced_threshold,"
"stopway, reciprocal, ils FROM runway WHERE rowid=?1");
getAirportItems = prepare("SELECT rowid FROM positioned WHERE airport=?1 " AND_TYPED);
setAirportMetar = prepare("UPDATE airport SET has_metar=?2 WHERE rowid="
"(SELECT rowid FROM positioned WHERE ident=?1 AND type>=?3 AND type <=?4)");
sqlite3_bind_int(setAirportMetar, 3, FGPositioned::AIRPORT);
sqlite3_bind_int(setAirportMetar, 4, FGPositioned::SEAPORT);
setRunwayReciprocal = prepare("UPDATE runway SET reciprocal=?2 WHERE rowid=?1");
setRunwayILS = prepare("UPDATE runway SET ils=?2 WHERE rowid=?1");
updateRunwayThreshold = prepare("UPDATE runway SET heading=?2, displaced_threshold=?3, stopway=?4 WHERE rowid=?1");
insertPositionedQuery = prepare("INSERT INTO positioned "
"(type, ident, name, airport, lon, lat, elev_m, octree_node, "
"cart_x, cart_y, cart_z)"
" VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11)");
setAirportPos = prepare("UPDATE positioned SET lon=?2, lat=?3, elev_m=?4, octree_node=?5, "
"cart_x=?6, cart_y=?7, cart_z=?8 WHERE rowid=?1");
insertAirport = prepare("INSERT INTO airport (rowid, has_metar) VALUES (?, ?)");
insertNavaid = prepare("INSERT INTO navaid (rowid, freq, range_nm, multiuse, runway, colocated)"
" VALUES (?1, ?2, ?3, ?4, ?5, ?6)");
updateILS = prepare("UPDATE navaid SET multiuse=?2 WHERE rowid=?1");
insertCommStation = prepare("INSERT INTO comm (rowid, freq_khz, range_nm)"
" VALUES (?, ?, ?)");
insertRunway = prepare("INSERT INTO runway "
"(rowid, heading, length_ft, width_m, surface, displaced_threshold, stopway, reciprocal)"
" VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8)");
runwayLengthFtQuery = prepare("SELECT length_ft FROM runway WHERE rowid=?1");
// query statement
findClosestWithIdent = prepare("SELECT rowid FROM positioned WHERE ident=?1 "
AND_TYPED " ORDER BY distanceCartSqr(cart_x, cart_y, cart_z, ?4, ?5, ?6)");
findCommByFreq = prepare("SELECT positioned.rowid FROM positioned, comm WHERE "
"positioned.rowid=comm.rowid AND freq_khz=?1 "
AND_TYPED " ORDER BY distanceCartSqr(cart_x, cart_y, cart_z, ?4, ?5, ?6)");
findNavsByFreq = prepare("SELECT positioned.rowid FROM positioned, navaid WHERE "
"positioned.rowid=navaid.rowid "
"AND navaid.freq=?1 " AND_TYPED
" ORDER BY distanceCartSqr(cart_x, cart_y, cart_z, ?4, ?5, ?6)");
findNavsByFreqNoPos = prepare("SELECT positioned.rowid FROM positioned, navaid WHERE "
"positioned.rowid=navaid.rowid AND freq=?1 " AND_TYPED);
// for an octree branch, return the child octree nodes which exist,
// described as a bit-mask
getOctreeChildren = prepare("SELECT children FROM octree WHERE rowid=?1");
#ifdef LAZY_OCTREE_UPDATES
updateOctreeChildren = prepare("UPDATE octree SET children=?2 WHERE rowid=?1");
#else
// mask the new child value into the existing one
updateOctreeChildren = prepare("UPDATE octree SET children=(?2 | children) WHERE rowid=?1");
#endif
// define a new octree node (with no children)
insertOctree = prepare("INSERT INTO octree (rowid, children) VALUES (?1, 0)");
getOctreeLeafChildren = prepare("SELECT rowid, type FROM positioned WHERE octree_node=?1");
searchAirports = prepare("SELECT ident, name FROM positioned WHERE (name LIKE ?1 OR ident LIKE ?1) " AND_TYPED);
sqlite3_bind_int(searchAirports, 2, FGPositioned::AIRPORT);
sqlite3_bind_int(searchAirports, 3, FGPositioned::SEAPORT);
getAirportItemByIdent = prepare("SELECT rowid FROM positioned WHERE airport=?1 AND ident=?2 AND type=?3");
findAirportRunway = prepare("SELECT airport, rowid FROM positioned WHERE ident=?2 AND type=?3 AND airport="
"(SELECT rowid FROM positioned WHERE type=?4 AND ident=?1)");
sqlite3_bind_int(findAirportRunway, 3, FGPositioned::RUNWAY);
sqlite3_bind_int(findAirportRunway, 4, FGPositioned::AIRPORT);
// three-way join to get the navaid ident and runway ident in a single select.
// we're joining positioned to itself by the navaid runway, with the complication
// that we need to join the navaids table to get the runway ID.
// we also need to filter by type to excluse glideslope (GS) matches
findILS = prepare("SELECT nav.rowid FROM positioned AS nav, positioned AS rwy, navaid WHERE "
"nav.ident=?1 AND nav.airport=?2 AND rwy.ident=?3 "
"AND rwy.rowid = navaid.runway AND navaid.rowid=nav.rowid "
"AND (nav.type=?4 OR nav.type=?5)");
sqlite3_bind_int(findILS, 4, FGPositioned::ILS);
sqlite3_bind_int(findILS, 5, FGPositioned::LOC);
findAirway = prepare("SELECT rowid FROM airway WHERE network=?1 AND ident=?2");
insertAirway = prepare("INSERT INTO airway (ident, network) "
"VALUES (?1, ?2)");
insertAirwayEdge = prepare("INSERT INTO airway_edge (network, airway, a, b) "
"VALUES (?1, ?2, ?3, ?4)");
isPosInAirway = prepare("SELECT rowid FROM airway_edge WHERE network=?1 AND a=?2");
airwayEdgesFrom = prepare("SELECT airway, b FROM airway_edge WHERE network=?1 AND a=?2");
}
void writeIntProperty(const string& key, int value)
{
sqlite_bind_stdstring(writePropertyQuery, 1, key);
sqlite3_bind_int(writePropertyQuery, 2, value);
execSelect(writePropertyQuery);
}
FGPositioned* loadFromStmt(sqlite3_stmt_ptr query);
FGAirport* loadAirport(sqlite_int64 rowId,
FGPositioned::Type ty,
const string& id, const string& name, const SGGeod& pos)
{
reset(loadAirportStmt);
sqlite3_bind_int64(loadAirportStmt, 1, rowId);
execSelect1(loadAirportStmt);
bool hasMetar = sqlite3_column_int(loadAirportStmt, 0);
return new FGAirport(rowId, id, pos, name, hasMetar, ty);
}
FGRunwayBase* loadRunway(sqlite3_int64 rowId, FGPositioned::Type ty,
const string& id, const SGGeod& pos, PositionedID apt)
{
reset(loadRunwayStmt);
sqlite3_bind_int(loadRunwayStmt, 1, rowId);
execSelect1(loadRunwayStmt);
double heading = sqlite3_column_double(loadRunwayStmt, 0);
double lengthM = sqlite3_column_int(loadRunwayStmt, 1);
double widthM = sqlite3_column_double(loadRunwayStmt, 2);
int surface = sqlite3_column_int(loadRunwayStmt, 3);
if (ty == FGPositioned::TAXIWAY) {
return new FGTaxiway(rowId, id, pos, heading, lengthM, widthM, surface);
} else {
double displacedThreshold = sqlite3_column_double(loadRunwayStmt, 4);
double stopway = sqlite3_column_double(loadRunwayStmt, 5);
PositionedID reciprocal = sqlite3_column_int64(loadRunwayStmt, 6);
PositionedID ils = sqlite3_column_int64(loadRunwayStmt, 7);
FGRunway* r = new FGRunway(rowId, apt, id, pos, heading, lengthM, widthM,
displacedThreshold, stopway, surface, false);
if (reciprocal > 0) {
r->setReciprocalRunway(reciprocal);
}
if (ils > 0) {
r->setILS(ils);
}
return r;
}
}
CommStation* loadComm(sqlite3_int64 rowId, FGPositioned::Type ty,
const string& id, const string& name,
const SGGeod& pos,
PositionedID airport)
{
reset(loadCommStation);
sqlite3_bind_int64(loadCommStation, 1, rowId);
execSelect1(loadCommStation);
int range = sqlite3_column_int(loadCommStation, 0);
int freqKhz = sqlite3_column_int(loadCommStation, 1);
CommStation* c = new CommStation(rowId, id, ty, pos, freqKhz, range);
c->setAirport(airport);
return c;
}
FGPositioned* loadNav(sqlite3_int64 rowId,
FGPositioned::Type ty, const string& id,
const string& name, const SGGeod& pos)
{
reset(loadNavaid);
sqlite3_bind_int64(loadNavaid, 1, rowId);
execSelect1(loadNavaid);
PositionedID runway = sqlite3_column_int64(loadNavaid, 3);
// marker beacons are light-weight
if ((ty == FGPositioned::OM) || (ty == FGPositioned::IM) ||
(ty == FGPositioned::MM))
{
return new FGMarkerBeaconRecord(rowId, ty, runway, pos);
}
int rangeNm = sqlite3_column_int(loadNavaid, 0),
freq = sqlite3_column_int(loadNavaid, 1);
double mulituse = sqlite3_column_double(loadNavaid, 2);
//sqlite3_int64 colocated = sqlite3_column_int64(loadNavaid, 4);
return new FGNavRecord(rowId, ty, id, name, pos, freq, rangeNm, mulituse, runway);
}
PositionedID insertPositioned(FGPositioned::Type ty, const string& ident,
const string& name, const SGGeod& pos, PositionedID apt,
bool spatialIndex)
{
SGVec3d cartPos(SGVec3d::fromGeod(pos));
reset(insertPositionedQuery);
sqlite3_bind_int(insertPositionedQuery, 1, ty);
sqlite_bind_stdstring(insertPositionedQuery, 2, ident);
sqlite_bind_stdstring(insertPositionedQuery, 3, name);
sqlite3_bind_int64(insertPositionedQuery, 4, apt);
sqlite3_bind_double(insertPositionedQuery, 5, pos.getLongitudeDeg());
sqlite3_bind_double(insertPositionedQuery, 6, pos.getLatitudeDeg());
sqlite3_bind_double(insertPositionedQuery, 7, pos.getElevationM());
if (spatialIndex) {
Octree::Leaf* octreeLeaf = Octree::global_spatialOctree->findLeafForPos(cartPos);
assert(intersects(octreeLeaf->bbox(), cartPos));
sqlite3_bind_int64(insertPositionedQuery, 8, octreeLeaf->guid());
} else {
sqlite3_bind_null(insertPositionedQuery, 8);
}
sqlite3_bind_double(insertPositionedQuery, 9, cartPos.x());
sqlite3_bind_double(insertPositionedQuery, 10, cartPos.y());
sqlite3_bind_double(insertPositionedQuery, 11, cartPos.z());
PositionedID r = execInsert(insertPositionedQuery);
return r;
}
FGPositioned::List findAllByString(const string& s, const string& column,
FGPositioned::Filter* filter, bool exact)
{
string query = s;
if (!exact) query += "*";
// build up SQL query text
string matchTerm = exact ? "=?1" : " LIKE ?1";
string sql = "SELECT rowid FROM positioned WHERE " + column + matchTerm;
if (filter) {
sql += AND_TYPED;
}
// find or prepare a suitable statement frrm the SQL
sqlite3_stmt_ptr stmt = findByStringDict[sql];
if (!stmt) {
stmt = prepare(sql);
findByStringDict[sql] = stmt;
}
reset(stmt);
sqlite_bind_stdstring(stmt, 1, query);
if (filter) {
sqlite3_bind_int(stmt, 2, filter->minType());
sqlite3_bind_int(stmt, 3, filter->maxType());
}
FGPositioned::List result;
// run the prepared SQL
while (stepSelect(stmt))
{
FGPositioned* pos = outer->loadById(sqlite3_column_int64(stmt, 0));
if (filter && !filter->pass(pos)) {
continue;
}
result.push_back(pos);
}
return result;
}
PositionedIDVec selectIds(sqlite3_stmt_ptr query)
{
PositionedIDVec result;
while (stepSelect(query)) {
result.push_back(sqlite3_column_int64(query, 0));
}
return result;
}
double runwayLengthFt(PositionedID rwy)
{
reset(runwayLengthFtQuery);
sqlite3_bind_int64(runwayLengthFtQuery, 1, rwy);
execSelect1(runwayLengthFtQuery);
return sqlite3_column_double(runwayLengthFtQuery, 0);
}
void flushDeferredOctreeUpdates()
{
BOOST_FOREACH(Octree::Branch* nd, deferredOctreeUpdates) {
reset(updateOctreeChildren);
sqlite3_bind_int64(updateOctreeChildren, 1, nd->guid());
sqlite3_bind_int(updateOctreeChildren, 2, nd->childMask());
execUpdate(updateOctreeChildren);
}
deferredOctreeUpdates.clear();
}
NavDataCache* outer;
sqlite3* db;
SGPath path;
/// the actual cache of ID -> instances. This holds an owning reference,
/// so once items are in the cache they will never be deleted until
/// the cache drops its reference
PositionedCache cache;
unsigned int cacheHits, cacheMisses;
SGPath aptDatPath, metarDatPath, navDatPath, fixDatPath,
carrierDatPath, airwayDatPath;
sqlite3_stmt_ptr readPropertyQuery, writePropertyQuery,
stampFileCache, statCacheCheck,
loadAirportStmt, loadCommStation, loadPositioned, loadNavaid,
loadRunwayStmt;
sqlite3_stmt_ptr insertPositionedQuery, insertAirport, insertTower, insertRunway,
insertCommStation, insertNavaid;
sqlite3_stmt_ptr setAirportMetar, setRunwayReciprocal, setRunwayILS,
setAirportPos, updateRunwayThreshold, updateILS;
sqlite3_stmt_ptr findClosestWithIdent;
// octree (spatial index) related queries
sqlite3_stmt_ptr getOctreeChildren, insertOctree, updateOctreeChildren,
getOctreeLeafChildren;
sqlite3_stmt_ptr searchAirports;
sqlite3_stmt_ptr findCommByFreq, findNavsByFreq,
findNavsByFreqNoPos;
sqlite3_stmt_ptr getAirportItems, getAirportItemByIdent;
sqlite3_stmt_ptr findAirportRunway,
findILS;
sqlite3_stmt_ptr runwayLengthFtQuery;
// airways
sqlite3_stmt_ptr findAirway, insertAirwayEdge, isPosInAirway, airwayEdgesFrom,
insertAirway;
// since there's many permutations of ident/name queries, we create
// them programtically, but cache the exact query by its raw SQL once
// used.
std::map<string, sqlite3_stmt_ptr> findByStringDict;
typedef std::vector<sqlite3_stmt_ptr> StmtVec;
StmtVec prepared;
std::set<Octree::Branch*> deferredOctreeUpdates;
};
//////////////////////////////////////////////////////////////////////
FGPositioned* NavDataCache::NavDataCachePrivate::loadFromStmt(sqlite3_stmt_ptr query)
{
execSelect1(query);
sqlite3_int64 rowid = sqlite3_column_int64(query, 0);
FGPositioned::Type ty = (FGPositioned::Type) sqlite3_column_int(query, 1);
string ident = (char*) sqlite3_column_text(query, 2);
string name = (char*) sqlite3_column_text(query, 3);
sqlite3_int64 aptId = sqlite3_column_int64(query, 4);
double lon = sqlite3_column_double(query, 5);
double lat = sqlite3_column_double(query, 6);
double elev = sqlite3_column_double(query, 7);
SGGeod pos = SGGeod::fromDegM(lon, lat, elev);
switch (ty) {
case FGPositioned::AIRPORT:
case FGPositioned::SEAPORT:
case FGPositioned::HELIPORT:
return loadAirport(rowid, ty, ident, name, pos);
case FGPositioned::TOWER:
return new AirportTower(rowid, aptId, ident, pos);
case FGPositioned::RUNWAY:
case FGPositioned::TAXIWAY:
return loadRunway(rowid, ty, ident, pos, aptId);
case FGPositioned::LOC:
case FGPositioned::VOR:
case FGPositioned::GS:
case FGPositioned::ILS:
case FGPositioned::NDB:
case FGPositioned::OM:
case FGPositioned::MM:
case FGPositioned::IM:
case FGPositioned::DME:
case FGPositioned::TACAN:
case FGPositioned::MOBILE_TACAN:
{
if (aptId > 0) {
FGAirport* apt = (FGAirport*) outer->loadById(aptId);
if (apt->validateILSData()) {
SG_LOG(SG_NAVCACHE, SG_INFO, "re-loaded ILS data for " << apt->ident());
// queried data above is probably invalid, force us to go around again
// (the next time through, validateILSData will return false)
return outer->loadById(rowid);
}
}
return loadNav(rowid, ty, ident, name, pos);
}
case FGPositioned::FIX:
return new FGFix(rowid, ident, pos);
case FGPositioned::WAYPOINT:
{
FGPositioned* wpt = new FGPositioned(rowid, FGPositioned::WAYPOINT, ident, pos);
return wpt;
}
case FGPositioned::FREQ_GROUND:
case FGPositioned::FREQ_TOWER:
case FGPositioned::FREQ_ATIS:
case FGPositioned::FREQ_AWOS:
case FGPositioned::FREQ_APP_DEP:
case FGPositioned::FREQ_ENROUTE:
case FGPositioned::FREQ_CLEARANCE:
case FGPositioned::FREQ_UNICOM:
return loadComm(rowid, ty, ident, name, pos, aptId);
default:
return NULL;
}
}
static NavDataCache* static_instance = NULL;
NavDataCache::NavDataCache()
{
const int MAX_TRIES = 3;
SGPath homePath(globals->get_fg_home());
homePath.append("navdata.cache");
for (int t=0; t < MAX_TRIES; ++t) {
try {
d.reset(new NavDataCachePrivate(homePath, this));
d->init();
//d->checkCacheFile();
// reached this point with no exception, success
break;
} catch (sg_exception& e) {
SG_LOG(SG_NAVCACHE, SG_WARN, "NavCache: init failed:" << e.what()
<< " (attempt " << t << ")");
homePath.remove();
d.reset();
}
} // of retry loop
double RADIUS_EARTH_M = 7000 * 1000.0; // 7000km is plenty
SGVec3d earthExtent(RADIUS_EARTH_M, RADIUS_EARTH_M, RADIUS_EARTH_M);
Octree::global_spatialOctree =
new Octree::Branch(SGBox<double>(-earthExtent, earthExtent), 1);
d->aptDatPath = SGPath(globals->get_fg_root());
d->aptDatPath.append("Airports/apt.dat.gz");
d->metarDatPath = SGPath(globals->get_fg_root());
d->metarDatPath.append("Airports/metar.dat.gz");
d->navDatPath = SGPath(globals->get_fg_root());
d->navDatPath.append("Navaids/nav.dat.gz");
d->fixDatPath = SGPath(globals->get_fg_root());
d->fixDatPath.append("Navaids/fix.dat.gz");
d->carrierDatPath = SGPath(globals->get_fg_root());
d->carrierDatPath.append("Navaids/carrier_nav.dat.gz");
d->airwayDatPath = SGPath(globals->get_fg_root());
d->airwayDatPath.append("Navaids/awy.dat.gz");
}
NavDataCache::~NavDataCache()
{
assert(static_instance == this);
static_instance = NULL;
SG_LOG(SG_NAVCACHE, SG_INFO, "closing the navcache");
d.reset();
}
NavDataCache* NavDataCache::instance()
{
if (!static_instance) {
static_instance = new NavDataCache;
}
return static_instance;
}
bool NavDataCache::isRebuildRequired()
{
if (isCachedFileModified(d->aptDatPath) ||
isCachedFileModified(d->metarDatPath) ||
isCachedFileModified(d->navDatPath) ||
isCachedFileModified(d->fixDatPath) ||
isCachedFileModified(d->airwayDatPath))
{
SG_LOG(SG_NAVCACHE, SG_INFO, "NavCache: rebuild required");
return true;
}
SG_LOG(SG_NAVCACHE, SG_INFO, "NavCache: no rebuild required");
return false;
}
void NavDataCache::rebuild()
{
try {
d->runSQL("BEGIN");
d->runSQL("DELETE FROM positioned");
d->runSQL("DELETE FROM airport");
d->runSQL("DELETE FROM runway");
d->runSQL("DELETE FROM navaid");
d->runSQL("DELETE FROM comm");
d->runSQL("DELETE FROM octree");
d->runSQL("DELETE FROM airway");
d->runSQL("DELETE FROM airway_edge");
// initialise the root octree node
d->runSQL("INSERT INTO octree (rowid, children) VALUES (1, 0)");
SGTimeStamp st;
st.stamp();
airportDBLoad(d->aptDatPath);
SG_LOG(SG_NAVCACHE, SG_INFO, "apt.dat load took:" << st.elapsedMSec());
metarDataLoad(d->metarDatPath);
stampCacheFile(d->aptDatPath);
stampCacheFile(d->metarDatPath);
st.stamp();
loadFixes(d->fixDatPath);
stampCacheFile(d->fixDatPath);
SG_LOG(SG_NAVCACHE, SG_INFO, "fix.dat load took:" << st.elapsedMSec());
st.stamp();
navDBInit(d->navDatPath);
stampCacheFile(d->navDatPath);
SG_LOG(SG_NAVCACHE, SG_INFO, "nav.dat load took:" << st.elapsedMSec());
loadCarrierNav(d->carrierDatPath);
stampCacheFile(d->carrierDatPath);
st.stamp();
Airway::load(d->airwayDatPath);
stampCacheFile(d->airwayDatPath);
SG_LOG(SG_NAVCACHE, SG_INFO, "awy.dat load took:" << st.elapsedMSec());
d->flushDeferredOctreeUpdates();
d->runSQL("COMMIT");
} catch (sg_exception& e) {
SG_LOG(SG_NAVCACHE, SG_ALERT, "caught exception rebuilding navCache:" << e.what());
// abandon the DB transation completely
d->runSQL("ROLLBACK");
}
}
int NavDataCache::readIntProperty(const string& key)
{
d->reset(d->readPropertyQuery);
sqlite_bind_stdstring(d->readPropertyQuery, 1, key);
if (d->execSelect(d->readPropertyQuery)) {
return sqlite3_column_int(d->readPropertyQuery, 0);
} else {
SG_LOG(SG_NAVCACHE, SG_WARN, "readIntProperty: unknown:" << key);
return 0; // no such property
}
}
double NavDataCache::readDoubleProperty(const string& key)
{
d->reset(d->readPropertyQuery);
sqlite_bind_stdstring(d->readPropertyQuery, 1, key);
if (d->execSelect(d->readPropertyQuery)) {
return sqlite3_column_double(d->readPropertyQuery, 0);
} else {
SG_LOG(SG_NAVCACHE, SG_WARN, "readDoubleProperty: unknown:" << key);
return 0.0; // no such property
}
}
string NavDataCache::readStringProperty(const string& key)
{
d->reset(d->readPropertyQuery);
sqlite_bind_stdstring(d->readPropertyQuery, 1, key);
if (d->execSelect(d->readPropertyQuery)) {
return (char*) sqlite3_column_text(d->readPropertyQuery, 0);
} else {
SG_LOG(SG_NAVCACHE, SG_WARN, "readStringProperty: unknown:" << key);
return string(); // no such property
}
}
void NavDataCache::writeIntProperty(const string& key, int value)
{
d->writeIntProperty(key, value);
}
void NavDataCache::writeStringProperty(const string& key, const string& value)
{
d->reset(d->writePropertyQuery);
sqlite_bind_stdstring(d->writePropertyQuery, 1, key);
sqlite_bind_stdstring(d->writePropertyQuery, 2, value);
d->execSelect(d->writePropertyQuery);
}
void NavDataCache::writeDoubleProperty(const string& key, const double& value)
{
d->reset(d->writePropertyQuery);
sqlite_bind_stdstring(d->writePropertyQuery, 1, key);
sqlite3_bind_double(d->writePropertyQuery, 2, value);
d->execSelect(d->writePropertyQuery);
}
bool NavDataCache::isCachedFileModified(const SGPath& path) const
{
if (!path.exists()) {
throw sg_io_exception("isCachedFileModified: Missing file:" + path.str());
}
d->reset(d->statCacheCheck);
sqlite_bind_temp_stdstring(d->statCacheCheck, 1, path.str());
if (d->execSelect(d->statCacheCheck)) {
time_t modtime = sqlite3_column_int64(d->statCacheCheck, 0);
return (modtime != path.modTime());
} else {
return true;
}
}
void NavDataCache::stampCacheFile(const SGPath& path)
{
d->reset(d->stampFileCache);
sqlite_bind_temp_stdstring(d->stampFileCache, 1, path.str());
sqlite3_bind_int64(d->stampFileCache, 2, path.modTime());
d->execInsert(d->stampFileCache);
}
FGPositioned* NavDataCache::loadById(PositionedID rowid)
{
if (rowid == 0) {
return NULL;
}
PositionedCache::iterator it = d->cache.find(rowid);
if (it != d->cache.end()) {
d->cacheHits++;
return it->second; // cache it
}
d->reset(d->loadPositioned);
sqlite3_bind_int64(d->loadPositioned, 1, rowid);
FGPositioned* pos = d->loadFromStmt(d->loadPositioned);
d->cache.insert(it, PositionedCache::value_type(rowid, pos));
d->cacheMisses++;
return pos;
}
PositionedID NavDataCache::insertAirport(FGPositioned::Type ty, const string& ident,
const string& name)
{
// airports have their pos computed based on the avergae runway centres
// so the pos isn't available immediately. Pass a dummy pos and avoid
// doing spatial indexing until later
sqlite3_int64 rowId = d->insertPositioned(ty, ident, name, SGGeod(),
0 /* airport */,
false /* spatial index */);
d->reset(d->insertAirport);
sqlite3_bind_int64(d->insertAirport, 1, rowId);
d->execInsert(d->insertAirport);
return rowId;
}
void NavDataCache::updatePosition(PositionedID item, const SGGeod &pos)
{
SGVec3d cartPos(SGVec3d::fromGeod(pos));
d->reset(d->setAirportPos);
sqlite3_bind_int(d->setAirportPos, 1, item);
sqlite3_bind_double(d->setAirportPos, 2, pos.getLongitudeDeg());
sqlite3_bind_double(d->setAirportPos, 3, pos.getLatitudeDeg());
sqlite3_bind_double(d->setAirportPos, 4, pos.getElevationM());
Octree::Leaf* octreeLeaf = Octree::global_spatialOctree->findLeafForPos(cartPos);
sqlite3_bind_int64(d->setAirportPos, 5, octreeLeaf->guid());
sqlite3_bind_double(d->setAirportPos, 6, cartPos.x());
sqlite3_bind_double(d->setAirportPos, 7, cartPos.y());
sqlite3_bind_double(d->setAirportPos, 8, cartPos.z());
d->execUpdate(d->setAirportPos);
}
void NavDataCache::insertTower(PositionedID airportId, const SGGeod& pos)
{
d->insertPositioned(FGPositioned::TOWER, string(), string(),
pos, airportId, true /* spatial index */);
}
PositionedID
NavDataCache::insertRunway(FGPositioned::Type ty, const string& ident,
const SGGeod& pos, PositionedID apt,
double heading, double length, double width, double displacedThreshold,
double stopway, int surfaceCode)
{
// only runways are spatially indexed; don't bother indexing taxiways
// or pavements
bool spatialIndex = (ty == FGPositioned::RUNWAY);
sqlite3_int64 rowId = d->insertPositioned(ty, cleanRunwayNo(ident), "", pos, apt,
spatialIndex);
d->reset(d->insertRunway);
sqlite3_bind_int64(d->insertRunway, 1, rowId);
sqlite3_bind_double(d->insertRunway, 2, heading);
sqlite3_bind_double(d->insertRunway, 3, length);
sqlite3_bind_double(d->insertRunway, 4, width);
sqlite3_bind_int(d->insertRunway, 5, surfaceCode);
sqlite3_bind_double(d->insertRunway, 6, displacedThreshold);
sqlite3_bind_double(d->insertRunway, 7, stopway);
return d->execInsert(d->insertRunway);
}
void NavDataCache::setRunwayReciprocal(PositionedID runway, PositionedID recip)
{
d->reset(d->setRunwayReciprocal);
sqlite3_bind_int64(d->setRunwayReciprocal, 1, runway);
sqlite3_bind_int64(d->setRunwayReciprocal, 2, recip);
d->execUpdate(d->setRunwayReciprocal);
// and the opposite direction too!
d->reset(d->setRunwayReciprocal);
sqlite3_bind_int64(d->setRunwayReciprocal, 2, runway);
sqlite3_bind_int64(d->setRunwayReciprocal, 1, recip);
d->execUpdate(d->setRunwayReciprocal);
}
void NavDataCache::setRunwayILS(PositionedID runway, PositionedID ils)
{
d->reset(d->setRunwayILS);
sqlite3_bind_int64(d->setRunwayILS, 1, runway);
sqlite3_bind_int64(d->setRunwayILS, 2, ils);
d->execUpdate(d->setRunwayILS);
}
void NavDataCache::updateRunwayThreshold(PositionedID runwayID, const SGGeod &aThreshold,
double aHeading, double aDisplacedThreshold,
double aStopway)
{
// update the runway information
d->reset(d->updateRunwayThreshold);
sqlite3_bind_int64(d->updateRunwayThreshold, 1, runwayID);
sqlite3_bind_double(d->updateRunwayThreshold, 2, aHeading);
sqlite3_bind_double(d->updateRunwayThreshold, 3, aDisplacedThreshold);
sqlite3_bind_double(d->updateRunwayThreshold, 4, aStopway);
d->execUpdate(d->updateRunwayThreshold);
// compute the new runway center, based on the threshold lat/lon and length,
double offsetFt = (0.5 * d->runwayLengthFt(runwayID));
SGGeod newCenter;
double dummy;
SGGeodesy::direct(aThreshold, aHeading, offsetFt * SG_FEET_TO_METER, newCenter, dummy);
// now update the positional data
updatePosition(runwayID, newCenter);
}
PositionedID
NavDataCache::insertNavaid(FGPositioned::Type ty, const string& ident,
const string& name, const SGGeod& pos,
int freq, int range, double multiuse,
PositionedID apt, PositionedID runway)
{
bool spatialIndex = true;
if (ty == FGPositioned::MOBILE_TACAN) {
spatialIndex = false;
}
sqlite3_int64 rowId = d->insertPositioned(ty, ident, name, pos, apt,
spatialIndex);
d->reset(d->insertNavaid);
sqlite3_bind_int64(d->insertNavaid, 1, rowId);
sqlite3_bind_int(d->insertNavaid, 2, freq);
sqlite3_bind_int(d->insertNavaid, 3, range);
sqlite3_bind_double(d->insertNavaid, 4, multiuse);
sqlite3_bind_int64(d->insertNavaid, 5, runway);
return d->execInsert(d->insertNavaid);
}
void NavDataCache::updateILS(PositionedID ils, const SGGeod& newPos, double aHdg)
{
d->reset(d->updateILS);
sqlite3_bind_int64(d->updateILS, 1, ils);
sqlite3_bind_double(d->updateILS, 2, aHdg);
d->execUpdate(d->updateILS);
updatePosition(ils, newPos);
}
PositionedID NavDataCache::insertCommStation(FGPositioned::Type ty,
const string& name, const SGGeod& pos, int freq, int range,
PositionedID apt)
{
sqlite3_int64 rowId = d->insertPositioned(ty, "", name, pos, apt, true);
d->reset(d->insertCommStation);
sqlite3_bind_int64(d->insertCommStation, 1, rowId);
sqlite3_bind_int(d->insertCommStation, 2, freq);
sqlite3_bind_int(d->insertCommStation, 3, range);
return d->execInsert(d->insertCommStation);
}
PositionedID NavDataCache::insertFix(const std::string& ident, const SGGeod& aPos)
{
return d->insertPositioned(FGPositioned::FIX, ident, string(), aPos, 0, true);
}
PositionedID NavDataCache::createUserWaypoint(const std::string& ident, const SGGeod& aPos)
{
return d->insertPositioned(FGPositioned::WAYPOINT, ident, string(), aPos, 0,
true /* spatial index */);
}
void NavDataCache::setAirportMetar(const string& icao, bool hasMetar)
{
d->reset(d->setAirportMetar);
sqlite_bind_stdstring(d->setAirportMetar, 1, icao);
sqlite3_bind_int(d->setAirportMetar, 2, hasMetar);
d->execUpdate(d->setAirportMetar);
}
FGPositioned::List NavDataCache::findAllWithIdent(const string& s,
FGPositioned::Filter* filter, bool exact)
{
return d->findAllByString(s, "ident", filter, exact);
}
FGPositioned::List NavDataCache::findAllWithName(const string& s,
FGPositioned::Filter* filter, bool exact)
{
return d->findAllByString(s, "name", filter, exact);
}
FGPositionedRef NavDataCache::findClosestWithIdent(const string& aIdent,
const SGGeod& aPos, FGPositioned::Filter* aFilter)
{
d->reset(d->findClosestWithIdent);
sqlite_bind_stdstring(d->findClosestWithIdent, 1, aIdent);
if (aFilter) {
sqlite3_bind_int(d->findClosestWithIdent, 2, aFilter->minType());
sqlite3_bind_int(d->findClosestWithIdent, 3, aFilter->maxType());
} else { // full type range
sqlite3_bind_int(d->findClosestWithIdent, 2, FGPositioned::INVALID);
sqlite3_bind_int(d->findClosestWithIdent, 3, FGPositioned::LAST_TYPE);
}
SGVec3d cartPos(SGVec3d::fromGeod(aPos));
sqlite3_bind_double(d->findClosestWithIdent, 4, cartPos.x());
sqlite3_bind_double(d->findClosestWithIdent, 5, cartPos.y());
sqlite3_bind_double(d->findClosestWithIdent, 6, cartPos.z());
while (d->stepSelect(d->findClosestWithIdent)) {
FGPositioned* pos = loadById(sqlite3_column_int64(d->findClosestWithIdent, 0));
if (aFilter && !aFilter->pass(pos)) {
continue;
}
return pos;
}
return NULL; // no matches at all
}
int NavDataCache::getOctreeBranchChildren(int64_t octreeNodeId)
{
d->reset(d->getOctreeChildren);
sqlite3_bind_int64(d->getOctreeChildren, 1, octreeNodeId);
d->execSelect1(d->getOctreeChildren);
return sqlite3_column_int(d->getOctreeChildren, 0);
}
void NavDataCache::defineOctreeNode(Octree::Branch* pr, Octree::Node* nd)
{
d->reset(d->insertOctree);
sqlite3_bind_int64(d->insertOctree, 1, nd->guid());
d->execInsert(d->insertOctree);
#ifdef LAZY_OCTREE_UPDATES
d->deferredOctreeUpdates.insert(pr);
#else
// lowest three bits of node ID are 0..7 index of the child in the parent
int childIndex = nd->guid() & 0x07;
d->reset(d->updateOctreeChildren);
sqlite3_bind_int64(d->updateOctreeChildren, 1, pr->guid());
// mask has bit N set where child N exists
int childMask = 1 << childIndex;
sqlite3_bind_int(d->updateOctreeChildren, 2, childMask);
d->execUpdate(d->updateOctreeChildren);
#endif
}
TypedPositionedVec
NavDataCache::getOctreeLeafChildren(int64_t octreeNodeId)
{
d->reset(d->getOctreeLeafChildren);
sqlite3_bind_int64(d->getOctreeLeafChildren, 1, octreeNodeId);
TypedPositionedVec r;
while (d->stepSelect(d->getOctreeLeafChildren)) {
FGPositioned::Type ty = static_cast<FGPositioned::Type>
(sqlite3_column_int(d->getOctreeLeafChildren, 1));
r.push_back(std::make_pair(ty,
sqlite3_column_int64(d->getOctreeLeafChildren, 0)));
}
return r;
}
/**
* A special purpose helper (used by FGAirport::searchNamesAndIdents) to
* implement the AirportList dialog. It's unfortunate that it needs to reside
* here, but for now it's least ugly solution.
*/
char** NavDataCache::searchAirportNamesAndIdents(const std::string& aFilter)
{
d->reset(d->searchAirports);
string s = "%" + aFilter + "%";
sqlite_bind_stdstring(d->searchAirports, 1, s);
unsigned int numMatches = 0, numAllocated = 16;
char** result = (char**) malloc(sizeof(char*) * numAllocated);
while (d->stepSelect(d->searchAirports)) {
if ((numMatches + 1) >= numAllocated) {
numAllocated <<= 1; // double in size!
// reallocate results array
char** nresult = (char**) malloc(sizeof(char*) * numAllocated);
memcpy(nresult, result, sizeof(char*) * numMatches);
free(result);
result = nresult;
}
// nasty code to avoid excessive string copying and allocations.
// We format results as follows (note whitespace!):
// ' name-of-airport-chars (ident)'
// so the total length is:
// 1 + strlen(name) + 4 + strlen(icao) + 1 + 1 (for the null)
// which gives a grand total of 7 + name-length + icao-length.
// note the ident can be three letters (non-ICAO local strip), four
// (default ICAO) or more (extended format ICAO)
int nameLength = sqlite3_column_bytes(d->searchAirports, 1);
int icaoLength = sqlite3_column_bytes(d->searchAirports, 0);
char* entry = (char*) malloc(7 + nameLength + icaoLength);
char* dst = entry;
*dst++ = ' ';
memcpy(dst, sqlite3_column_text(d->searchAirports, 1), nameLength);
dst += nameLength;
*dst++ = ' ';
*dst++ = ' ';
*dst++ = ' ';
*dst++ = '(';
memcpy(dst, sqlite3_column_text(d->searchAirports, 0), icaoLength);
dst += icaoLength;
*dst++ = ')';
*dst++ = 0;
result[numMatches++] = entry;
}
result[numMatches] = NULL; // end of list marker
return result;
}
FGPositionedRef
NavDataCache::findCommByFreq(int freqKhz, const SGGeod& aPos, FGPositioned::Filter* aFilter)
{
d->reset(d->findCommByFreq);
sqlite3_bind_int(d->findCommByFreq, 1, freqKhz);
if (aFilter) {
sqlite3_bind_int(d->findCommByFreq, 2, aFilter->minType());
sqlite3_bind_int(d->findCommByFreq, 3, aFilter->maxType());
} else { // full type range
sqlite3_bind_int(d->findCommByFreq, 2, FGPositioned::FREQ_GROUND);
sqlite3_bind_int(d->findCommByFreq, 3, FGPositioned::FREQ_UNICOM);
}
SGVec3d cartPos(SGVec3d::fromGeod(aPos));
sqlite3_bind_double(d->findCommByFreq, 4, cartPos.x());
sqlite3_bind_double(d->findCommByFreq, 5, cartPos.y());
sqlite3_bind_double(d->findCommByFreq, 6, cartPos.z());
if (!d->execSelect(d->findCommByFreq)) {
return NULL;
}
return loadById(sqlite3_column_int64(d->findCommByFreq, 0));
}
PositionedIDVec
NavDataCache::findNavaidsByFreq(int freqKhz, const SGGeod& aPos, FGPositioned::Filter* aFilter)
{
d->reset(d->findNavsByFreq);
sqlite3_bind_int(d->findNavsByFreq, 1, freqKhz);
if (aFilter) {
sqlite3_bind_int(d->findNavsByFreq, 2, aFilter->minType());
sqlite3_bind_int(d->findNavsByFreq, 3, aFilter->maxType());
} else { // full type range
sqlite3_bind_int(d->findNavsByFreq, 2, FGPositioned::NDB);
sqlite3_bind_int(d->findNavsByFreq, 3, FGPositioned::GS);
}
SGVec3d cartPos(SGVec3d::fromGeod(aPos));
sqlite3_bind_double(d->findNavsByFreq, 4, cartPos.x());
sqlite3_bind_double(d->findNavsByFreq, 5, cartPos.y());
sqlite3_bind_double(d->findNavsByFreq, 6, cartPos.z());
return d->selectIds(d->findNavsByFreq);
}
PositionedIDVec
NavDataCache::findNavaidsByFreq(int freqKhz, FGPositioned::Filter* aFilter)
{
d->reset(d->findNavsByFreqNoPos);
sqlite3_bind_int(d->findNavsByFreqNoPos, 1, freqKhz);
if (aFilter) {
sqlite3_bind_int(d->findNavsByFreqNoPos, 2, aFilter->minType());
sqlite3_bind_int(d->findNavsByFreqNoPos, 3, aFilter->maxType());
} else { // full type range
sqlite3_bind_int(d->findNavsByFreqNoPos, 2, FGPositioned::NDB);
sqlite3_bind_int(d->findNavsByFreqNoPos, 3, FGPositioned::GS);
}
return d->selectIds(d->findNavsByFreqNoPos);
}
PositionedIDVec
NavDataCache::airportItemsOfType(PositionedID apt,FGPositioned::Type ty,
FGPositioned::Type maxTy)
{
if (maxTy == FGPositioned::INVALID) {
maxTy = ty; // single-type range
}
d->reset(d->getAirportItems);
sqlite3_bind_int64(d->getAirportItems, 1, apt);
sqlite3_bind_int(d->getAirportItems, 2, ty);
sqlite3_bind_int(d->getAirportItems, 3, maxTy);
return d->selectIds(d->getAirportItems);
}
PositionedID
NavDataCache::airportItemWithIdent(PositionedID apt, FGPositioned::Type ty,
const std::string& ident)
{
d->reset(d->getAirportItemByIdent);
sqlite3_bind_int64(d->getAirportItemByIdent, 1, apt);
sqlite_bind_stdstring(d->getAirportItemByIdent, 2, ident);
sqlite3_bind_int(d->getAirportItemByIdent, 3, ty);
if (!d->execSelect(d->getAirportItemByIdent)) {
return 0;
}
return sqlite3_column_int64(d->getAirportItemByIdent, 0);
}
AirportRunwayPair
NavDataCache::findAirportRunway(const std::string& aName)
{
if (aName.empty()) {
return AirportRunwayPair();
}
string_list parts = simgear::strutils::split(aName);
if (parts.size() < 2) {
SG_LOG(SG_NAVCACHE, SG_WARN, "findAirportRunway: malformed name:" << aName);
return AirportRunwayPair();
}
d->reset(d->findAirportRunway);
sqlite_bind_stdstring(d->findAirportRunway, 1, parts[0]);
sqlite_bind_stdstring(d->findAirportRunway, 2, parts[1]);
if (!d->execSelect(d->findAirportRunway)) {
SG_LOG(SG_NAVCACHE, SG_WARN, "findAirportRunway: unknown airport/runway:" << aName);
return AirportRunwayPair();
}
// success, extract the IDs and continue
return AirportRunwayPair(sqlite3_column_int64(d->findAirportRunway, 0),
sqlite3_column_int64(d->findAirportRunway, 1));
}
PositionedID
NavDataCache::findILS(PositionedID airport, const string& runway, const string& navIdent)
{
d->reset(d->findILS);
sqlite_bind_stdstring(d->findILS, 1, navIdent);
sqlite3_bind_int64(d->findILS, 2, airport);
sqlite_bind_stdstring(d->findILS, 3, runway);
if (!d->execSelect(d->findILS)) {
return 0;
}
return sqlite3_column_int64(d->findILS, 0);
}
int NavDataCache::findAirway(int network, const string& aName)
{
d->reset(d->findAirway);
sqlite3_bind_int(d->findAirway, 1, network);
sqlite_bind_stdstring(d->findAirway, 2, aName);
if (d->execSelect(d->findAirway)) {
// already exists
return sqlite3_column_int(d->findAirway, 0);
}
d->reset(d->insertAirway);
sqlite_bind_stdstring(d->insertAirway, 1, aName);
sqlite3_bind_int(d->insertAirway, 2, network);
return d->execInsert(d->insertAirway);
}
void NavDataCache::insertEdge(int network, int airwayID, PositionedID from, PositionedID to)
{
// assume all edges are bidirectional for the moment
for (int i=0; i<2; ++i) {
d->reset(d->insertAirwayEdge);
sqlite3_bind_int(d->insertAirwayEdge, 1, network);
sqlite3_bind_int(d->insertAirwayEdge, 2, airwayID);
sqlite3_bind_int64(d->insertAirwayEdge, 3, from);
sqlite3_bind_int64(d->insertAirwayEdge, 4, to);
d->execInsert(d->insertAirwayEdge);
std::swap(from, to);
}
}
bool NavDataCache::isInAirwayNetwork(int network, PositionedID pos)
{
d->reset(d->isPosInAirway);
sqlite3_bind_int(d->isPosInAirway, 1, network);
sqlite3_bind_int64(d->isPosInAirway, 2, pos);
bool ok = d->execSelect(d->isPosInAirway);
return ok;
}
AirwayEdgeVec NavDataCache::airwayEdgesFrom(int network, PositionedID pos)
{
d->reset(d->airwayEdgesFrom);
sqlite3_bind_int(d->airwayEdgesFrom, 1, network);
sqlite3_bind_int64(d->airwayEdgesFrom, 2, pos);
AirwayEdgeVec result;
while (d->stepSelect(d->airwayEdgesFrom)) {
result.push_back(AirwayEdge(
sqlite3_column_int(d->airwayEdgesFrom, 0),
sqlite3_column_int64(d->airwayEdgesFrom, 1)
));
}
return result;
}
} // of namespace flightgear
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