mapserver/mapblockparser/mapdata.go

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package mapblockparser
import (
"bytes"
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"compress/zlib"
"errors"
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"io"
"strconv"
)
//TODO: mapdata struct with accessors
func parseMapdata(mapblock *MapBlock, data []byte) (int, error) {
r := bytes.NewReader(data)
cr := new(CountedReader)
cr.Reader = r
z, err := zlib.NewReader(cr)
if err != nil {
return 0, err
}
defer z.Close()
buf := new(bytes.Buffer)
io.Copy(buf, z)
if buf.Len() != 16384 {
return 0, errors.New("Mapdata length invalid: " + strconv.Itoa(buf.Len()))
}
mapblock.Mapdata = buf.Bytes()
return cr.Count, nil
}