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Optimise NavCache airport query

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- makes initial showing of 'Select Airport' dialog faster
This commit is contained in:
James Turner 2014-02-23 14:24:48 -08:00
parent 876e81edbd
commit d035fdf3a9
1 changed files with 22 additions and 11 deletions
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33
src/Navaids/NavDataCache.cxx
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@ -536,6 +536,11 @@ public:
sqlite3_bind_int(searchAirports, 2, FGPositioned::AIRPORT);
sqlite3_bind_int(searchAirports, 3, FGPositioned::SEAPORT);
getAllAirports = prepare("SELECT ident, name FROM positioned WHERE type>=?1 AND type <=?2");
sqlite3_bind_int(getAllAirports, 1, FGPositioned::AIRPORT);
sqlite3_bind_int(getAllAirports, 2, 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="
@ -897,7 +902,7 @@ public:
sqlite3_stmt_ptr getOctreeChildren, insertOctree, updateOctreeChildren,
getOctreeLeafChildren;
sqlite3_stmt_ptr searchAirports;
sqlite3_stmt_ptr searchAirports, getAllAirports;
sqlite3_stmt_ptr findCommByFreq, findNavsByFreq,
findNavsByFreqNoPos, findNavaidForRunway;
sqlite3_stmt_ptr getAirportItems, getAirportItemByIdent;
@ -1756,13 +1761,19 @@ NavDataCache::getOctreeLeafChildren(int64_t octreeNodeId)
*/
char** NavDataCache::searchAirportNamesAndIdents(const std::string& aFilter)
{
string s = "%" + aFilter + "%";
sqlite_bind_stdstring(d->searchAirports, 1, s);
sqlite3_stmt_ptr stmt;
unsigned int numMatches = 0, numAllocated = 16;
char** result = (char**) malloc(sizeof(char*) * numAllocated);
if (aFilter.empty()) {
stmt = d->getAllAirports;
numAllocated = 4096; // start much larger for all airports
} else {
stmt = d->searchAirports;
string s = "%" + aFilter + "%";
sqlite_bind_stdstring(stmt, 1, s);
}
while (d->stepSelect(d->searchAirports)) {
char** result = (char**) malloc(sizeof(char*) * numAllocated);
while (d->stepSelect(stmt)) {
if ((numMatches + 1) >= numAllocated) {
numAllocated <<= 1; // double in size!
// reallocate results array
@ -1780,18 +1791,18 @@ char** NavDataCache::searchAirportNamesAndIdents(const std::string& aFilter)
// 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);
int nameLength = sqlite3_column_bytes(stmt, 1);
int icaoLength = sqlite3_column_bytes(stmt, 0);
char* entry = (char*) malloc(7 + nameLength + icaoLength);
char* dst = entry;
*dst++ = ' ';
memcpy(dst, sqlite3_column_text(d->searchAirports, 1), nameLength);
memcpy(dst, sqlite3_column_text(stmt, 1), nameLength);
dst += nameLength;
*dst++ = ' ';
*dst++ = ' ';
*dst++ = ' ';
*dst++ = '(';
memcpy(dst, sqlite3_column_text(d->searchAirports, 0), icaoLength);
memcpy(dst, sqlite3_column_text(stmt, 0), icaoLength);
dst += icaoLength;
*dst++ = ')';
*dst++ = 0;
@ -1800,7 +1811,7 @@ char** NavDataCache::searchAirportNamesAndIdents(const std::string& aFilter)
}
result[numMatches] = NULL; // end of list marker
d->reset(d->searchAirports);
d->reset(stmt);
return result;
}