def writeHeader(self, osmVersion, phyghtmapVersion):
# write reset
self.writeReset()
header = []
#file format dataset (0xe0), length (0x04), format (o5m2)
header.extend(
[writableInt(0xe0),
writableInt(0x04),
writableString("o5m2")])
# timestamp dataset
timestampDataset = self.makeTimestampDataset()
header.append(timestampDataset)
# bounding box dataset
bboxDataset = self.makeBBoxDataset()
header.append(bboxDataset)
#write the header
self.outf.write(join(header))
def makeTimestampDataset(self):
timestampDataset = [
writableInt(0xdc),
]
timestampData = sint2str(self.timestamp)
timestampDataset.append(int2str(len(timestampData)))
timestampDataset.append(timestampData)
return join(timestampDataset)
def makeBBoxDataset(self):
# bbox dataset, with length
bboxDataset = [
writableInt(0xdb),
]
bboxData = join([sint2str(int(i * HUNDREDNANO)) for i in self.bbox])
bboxDataset.append(int2str(len(bboxData)))
bboxDataset.append(bboxData)
return join(bboxDataset)
def writeWay(self, way, idDelta, first=False):
wayDataset = []
# 0x11 means way
wayDataset.append(writableInt(0x11))
wayData = self.makeWayData(way, idDelta, first)
wayDataLen = len(wayData)
wayDataset.append(int2str(wayDataLen))
wayDataset.append(wayData)
self.outf.write(join(wayDataset))
def writeNode(self, node, lastNode, idDelta):
nodeDataset = []
# 0x10 means node
nodeDataset.append(writableInt(0x10))
nodeData = self.makeNodeData(node, lastNode, idDelta)
nodeDataLen = len(nodeData)
nodeDataset.append(int2str(nodeDataLen))
nodeDataset.append(nodeData)
self.outf.write(join(nodeDataset))
def makeVersionChunk(self, first=False):
data = []
# version
data.append(int2str(1))
# timestamp = self.timestamp or 0, if self.timestamp, write changeset and
# uid
# timestamp is delta coded
if first and self.writeTimestamp:
data.append(sint2str(self.timestamp))
else:
data.append(sint2str(0))
if self.writeTimestamp:
# changeset, delta coded
if first:
data.append(sint2str(1))
else:
data.append(sint2str(0))
# userid, username = ("", ""), string pair -> 0x00,0x00,0x00
data.append(self.stringTable.stringOrIndex(writableInt(0x00) * 3))
return join(data)
def writeReset(self):
self.outf.write(writableInt(0xff))
self.lastNodeId = 0
self.stringTable.reset()
def done(self):
self.outf.write(writableInt(0xfe))
self.__del__()