func (dec *dataDecoder) parseWays(pb *osmpbf.PrimitiveBlock, ways []*osmpbf.Way) {
st := pb.GetStringtable().GetS()
dateGranularity := int64(pb.GetDateGranularity())
for _, way := range ways {
var (
prev int64
nodeIDs []osm.WayNode
)
info := extractInfo(st, way.Info, dateGranularity)
if refs := way.GetRefs(); len(refs) > 0 {
nodeIDs = make([]osm.WayNode, len(refs))
for i, r := range refs {
prev = r + prev // delta encoding
nodeIDs[i].ID = osm.NodeID(prev)
}
}
dec.q = append(dec.q, osm.Element{
Way: &osm.Way{
ID: osm.WayID(way.Id),
User: info.User,
UserID: osm.UserID(info.UID),
Visible: info.Visible,
Version: int(info.Version),
ChangesetID: osm.ChangesetID(info.Changeset),
Timestamp: info.Timestamp,
Nodes: nodeIDs,
Tags: extractTags(st, way.Keys, way.Vals),
},
})
}
}
func (dec *dataDecoder) parseDenseNodes(pb *osmpbf.PrimitiveBlock, dn *osmpbf.DenseNodes) {
st := pb.GetStringtable().GetS()
granularity := int64(pb.GetGranularity())
latOffset := pb.GetLatOffset()
lonOffset := pb.GetLonOffset()
ids := dn.GetId()
lats := dn.GetLat()
lons := dn.GetLon()
di := dn.GetDenseinfo()
tu := tagUnpacker{st, dn.GetKeysVals(), 0}
state := &denseInfoState{
DenseInfo: di,
StringTable: st,
DateGranularity: int64(pb.GetDateGranularity()),
}
var id, lat, lon int64
for index := range ids {
id = ids[index] + id
lat = lats[index] + lat
lon = lons[index] + lon
info := state.Next()
dec.q = append(dec.q, osm.Element{
Node: &osm.Node{
ID: osm.NodeID(id),
Lat: 1e-9 * float64((latOffset + (granularity * lat))),
Lon: 1e-9 * float64((lonOffset + (granularity * lon))),
User: info.User,
UserID: osm.UserID(info.UID),
Visible: info.Visible,
Version: int(info.Version),
ChangesetID: osm.ChangesetID(info.Changeset),
Timestamp: info.Timestamp,
Tags: tu.Next(),
},
})
}
}
func (dec *dataDecoder) parseRelations(pb *osmpbf.PrimitiveBlock, relations []*osmpbf.Relation) {
st := pb.GetStringtable().GetS()
dateGranularity := int64(pb.GetDateGranularity())
for _, rel := range relations {
members := extractMembers(st, rel)
info := extractInfo(st, rel.GetInfo(), dateGranularity)
dec.q = append(dec.q, osm.Element{
Relation: &osm.Relation{
ID: osm.RelationID(rel.Id),
User: info.User,
UserID: osm.UserID(info.UID),
Visible: info.Visible,
Version: int(info.Version),
ChangesetID: osm.ChangesetID(info.Changeset),
Timestamp: info.Timestamp,
Tags: extractTags(st, rel.GetKeys(), rel.GetVals()),
Members: members,
},
})
}
}