bool Area::WriteOptimized(const TypeConfig& typeConfig,
FileWriter& writer) const
{
std::vector<Ring>::const_iterator ring=rings.begin();
bool multipleRings=rings.size()>1;
// Outer ring
writer.WriteTypeId(ring->GetType()->GetAreaId(),
typeConfig.GetAreaTypeIdBytes());
if (!ring->featureValueBuffer.Write(writer,
multipleRings)) {
return false;
}
if (multipleRings) {
writer.WriteNumber((uint32_t)(rings.size()-1));
}
if (!writer.Write(ring->nodes)) {
return false;
}
++ring;
// Potential additional rings
while (ring!=rings.end()) {
writer.WriteTypeId(ring->GetType()->GetAreaId(),
typeConfig.GetAreaTypeIdBytes());
if (ring->GetType()->GetAreaId()!=typeIgnore) {
if (!ring->featureValueBuffer.Write(writer)) {
return false;
}
}
writer.Write(ring->ring);
if (!writer.Write(ring->nodes)) {
return false;
}
++ring;
}
return !writer.HasError();
}
bool Area::ReadOptimized(const TypeConfig& typeConfig,
FileScanner& scanner)
{
if (!scanner.GetPos(fileOffset)) {
return false;
}
TypeId ringType;
bool multipleRings;
uint32_t ringCount=1;
FeatureValueBuffer featureValueBuffer;
scanner.ReadTypeId(ringType,
typeConfig.GetAreaTypeIdBytes());
TypeInfoRef type=typeConfig.GetAreaTypeInfo(ringType);
featureValueBuffer.SetType(type);
if (!featureValueBuffer.Read(scanner,
multipleRings)) {
return false;
}
if (multipleRings) {
if (!scanner.ReadNumber(ringCount)) {
return false;
}
ringCount++;
}
rings.resize(ringCount);
rings[0].featureValueBuffer=featureValueBuffer;
if (ringCount>1) {
rings[0].ring=masterRingId;
}
else {
rings[0].ring=outerRingId;
}
if (!scanner.Read(rings[0].nodes)) {
return false;
}
for (size_t i=1; i<ringCount; i++) {
scanner.ReadTypeId(ringType,
typeConfig.GetAreaTypeIdBytes());
type=typeConfig.GetAreaTypeInfo(ringType);
rings[i].SetType(type);
if (rings[i].featureValueBuffer.GetType()->GetAreaId()!=typeIgnore) {
if (!rings[i].featureValueBuffer.Read(scanner)) {
return false;
}
}
scanner.Read(rings[i].ring);
if (!scanner.Read(rings[i].nodes)) {
return false;
}
}
return !scanner.HasError();
}
bool AreaAreaIndex::GetIndexCell(const TypeConfig& typeConfig,
uint32_t level,
FileOffset offset,
IndexCache::CacheRef& cacheRef) const
{
if (!indexCache.GetEntry(offset,cacheRef)) {
IndexCache::CacheEntry cacheEntry(offset);
cacheRef=indexCache.SetEntry(cacheEntry);
if (!scanner.IsOpen()) {
if (!scanner.Open(datafilename,FileScanner::LowMemRandom,true)) {
log.Error() << "Error while opening '" << scanner.GetFilename() << "' for reading!";
return false;
}
}
scanner.SetPos(offset);
// Read offsets of children if not in the bottom level
if (level<maxLevel) {
for (size_t c=0; c<4; c++) {
if (!scanner.ReadNumber(cacheRef->value.children[c])) {
log.Error() << "Cannot read index data at offset " << offset << " in file '" << scanner.GetFilename() << "'";
return false;
}
}
}
else {
for (size_t c=0; c<4; c++) {
cacheRef->value.children[c]=0;
}
}
// Now read the way offsets by type in this index entry
uint32_t offsetCount;
// Areas
if (!scanner.ReadNumber(offsetCount)) {
log.Error() << "Cannot read index data for level " << level << " at offset " << offset << " in file '" << scanner.GetFilename() << "'";
return false;
}
cacheRef->value.areas.resize(offsetCount);
FileOffset prevOffset=0;
for (size_t c=0; c<offsetCount; c++) {
if (!scanner.ReadTypeId(cacheRef->value.areas[c].type,
typeConfig.GetAreaTypeIdBytes())) {
log.Error() << "Cannot read index data for level " << level << " at offset " << offset << " in file '" << scanner.GetFilename() << "'";
return false;
}
if (!scanner.ReadNumber(cacheRef->value.areas[c].offset)) {
log.Error() << "Cannot read index data for level " << level << " at offset " << offset << " in file '" << scanner.GetFilename() << "'";
return false;
}
cacheRef->value.areas[c].offset+=prevOffset;
prevOffset=cacheRef->value.areas[c].offset;
}
}
return true;
}
