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Code Issues Releases Wiki Activity

Improve variable naming, remove unneeded typecasts

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This commit is contained in:
Alexander Neumann 2015-04-30 00:06:08 +02:00
parent a40299fa24
commit 1b3d3a7ec2
1 changed files with 15 additions and 17 deletions
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32
pack/pack.go
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@ -121,12 +121,11 @@ type headerEntry struct {
// Returned are the complete number of bytes written, including the header. // Returned are the complete number of bytes written, including the header.
// After Finalize() has finished, the ID of this pack can be obtained by // After Finalize() has finished, the ID of this pack can be obtained by
// calling ID(). // calling ID().
func (p *Packer) Finalize() (int64, error) { func (p *Packer) Finalize() (bytesWritten int64, err error) {
p.m.Lock() p.m.Lock()
defer p.m.Unlock() defer p.m.Unlock()
// n tracks the number of bytes written for the header bytesWritten = int64(p.bytes)
var n int64 = int64(p.bytes)
// create writer to encrypt header // create writer to encrypt header
wr := crypto.EncryptTo(p.k, p.hw) wr := crypto.EncryptTo(p.k, p.hw)
@ -142,31 +141,31 @@ func (p *Packer) Finalize() (int64, error) {
err := binary.Write(wr, binary.LittleEndian, entry) err := binary.Write(wr, binary.LittleEndian, entry)
if err != nil { if err != nil {
wr.Close() wr.Close()
return int64(n), err return int64(bytesWritten), err
} }
n += int64(entrySize) bytesWritten += int64(entrySize)
} }
// finalize encrypted header // finalize encrypted header
err := wr.Close() err = wr.Close()
if err != nil { if err != nil {
return int64(n), err return int64(bytesWritten), err
} }
// account for crypto overhead // account for crypto overhead
n += crypto.Extension bytesWritten += crypto.Extension
// write length // write length
err = binary.Write(p.hw, binary.LittleEndian, uint32(len(p.blobs)*entrySize+crypto.Extension)) err = binary.Write(p.hw, binary.LittleEndian, uint32(len(p.blobs)*entrySize+crypto.Extension))
if err != nil { if err != nil {
return int64(n), err return bytesWritten, err
} }
n += int64(binary.Size(uint32(0))) bytesWritten += int64(binary.Size(uint32(0)))
p.bytes = uint(n) p.bytes = uint(bytesWritten)
return n, nil return bytesWritten, nil
} }
// ID returns the ID of all data written so far. // ID returns the ID of all data written so far.
@ -229,21 +228,20 @@ func NewUnpacker(k *crypto.Key, entries []Blob, rd io.ReadSeeker) (*Unpacker, er
return nil, fmt.Errorf("seeking to read header length failed: %v", err) return nil, fmt.Errorf("seeking to read header length failed: %v", err)
} }
// read length var length uint32
var l uint32 err = binary.Read(rd, binary.LittleEndian, &length)
err = binary.Read(rd, binary.LittleEndian, &l)
if err != nil { if err != nil {
return nil, fmt.Errorf("reading header length failed: %v", err) return nil, fmt.Errorf("reading header length failed: %v", err)
} }
// reset to the beginning of the header // reset to the beginning of the header
_, err = rd.Seek(-int64(ls)-int64(l), 2) _, err = rd.Seek(-int64(ls)-int64(length), 2)
if err != nil { if err != nil {
return nil, fmt.Errorf("seeking to read header length failed: %v", err) return nil, fmt.Errorf("seeking to read header length failed: %v", err)
} }
// read header // read header
hrd, err := crypto.DecryptFrom(k, io.LimitReader(rd, int64(l))) hrd, err := crypto.DecryptFrom(k, io.LimitReader(rd, int64(length)))
if err != nil { if err != nil {
return nil, err return nil, err
} }