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d14809694f
* [NOD-1223] Delete unused files/packages. * [NOD-1223] Move signal and limits to the os package. * [NOD-1223] Put database and dbaccess into the db package. * [NOD-1223] Fold the logs package into the logger package. * [NOD-1223] Rename domainmessage to appmessage. * [NOD-1223] Rename to/from DomainMessage to AppMessage. * [NOD-1223] Move appmessage to the app packge. * [NOD-1223] Move protocol to the app packge. * [NOD-1223] Move the network package to the infrastructure packge. * [NOD-1223] Rename cmd to executables. * [NOD-1223] Fix go.doc in the logger package.
45 lines
1.6 KiB
Go
45 lines
1.6 KiB
Go
package ff
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import "github.com/pkg/errors"
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// flatFileLocationSerializedSize is the size in bytes of a serialized flat
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// file location. See serializeLocation for further details.
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const flatFileLocationSerializedSize = 12
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// flatFileLocation identifies a particular flat file location.
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type flatFileLocation struct {
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fileNumber uint32
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fileOffset uint32
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dataLength uint32
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}
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// serializeLocation returns the serialization of the passed flat file location
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// of certain data. This to later on be used for retrieval of said data.
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// The serialized location format is:
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//
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// [0:4] File Number (4 bytes)
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// [4:8] File offset (4 bytes)
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// [8:12] Data length (4 bytes)
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func serializeLocation(location *flatFileLocation) []byte {
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var serializedLocation [flatFileLocationSerializedSize]byte
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byteOrder.PutUint32(serializedLocation[0:4], location.fileNumber)
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byteOrder.PutUint32(serializedLocation[4:8], location.fileOffset)
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byteOrder.PutUint32(serializedLocation[8:12], location.dataLength)
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return serializedLocation[:]
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}
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// deserializeLocation deserializes the passed serialized flat file location.
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// See serializeLocation for further details.
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func deserializeLocation(serializedLocation []byte) (*flatFileLocation, error) {
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if len(serializedLocation) != flatFileLocationSerializedSize {
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return nil, errors.Errorf("unexpected serializedLocation length: %d",
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len(serializedLocation))
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}
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location := &flatFileLocation{
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fileNumber: byteOrder.Uint32(serializedLocation[0:4]),
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fileOffset: byteOrder.Uint32(serializedLocation[4:8]),
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dataLength: byteOrder.Uint32(serializedLocation[8:12]),
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}
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return location, nil
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}
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