tidwall cfc65a13f6 Refactor repository and build scripts
This commit includes updates that affects the build, testing, and
deployment of Tile38.

- The root level build.sh has been broken up into multiple scripts
  and placed in the "scripts" directory.

- The vendor directory has been updated to follow the Go modules
  rules, thus `make` should work on isolated environments. Also
  some vendored packages may have been updated to a later
  version, if needed.

- The Makefile has been updated to allow for making single
  binaries such as `make tile38-server`. There is some scaffolding
  during the build process, so from now on all binaries should be
  made using make. For example, to run a development version of
  the tile38-cli binary, do this:
     make tile38-cli && ./tile38-cli
  not this:
     go run cmd/tile38-cli/main.go

- Travis.CI docker push script has been updated to address a
  change to Docker's JSON repo meta output, which in turn fixes
  a bug where new Tile38 versions were not being properly pushed
  to Docker
2019-11-18 10:33:15 -07:00

44 lines
870 B
Go

package snappy
import (
"bytes"
"encoding/binary"
master "github.com/golang/snappy"
)
var xerialHeader = []byte{130, 83, 78, 65, 80, 80, 89, 0}
// Encode encodes data as snappy with no framing header.
func Encode(src []byte) []byte {
return master.Encode(nil, src)
}
// Decode decodes snappy data whether it is traditional unframed
// or includes the xerial framing format.
func Decode(src []byte) ([]byte, error) {
if !bytes.Equal(src[:8], xerialHeader) {
return master.Decode(nil, src)
}
var (
pos = uint32(16)
max = uint32(len(src))
dst = make([]byte, 0, len(src))
chunk []byte
err error
)
for pos < max {
size := binary.BigEndian.Uint32(src[pos : pos+4])
pos += 4
chunk, err = master.Decode(chunk, src[pos:pos+size])
if err != nil {
return nil, err
}
pos += size
dst = append(dst, chunk...)
}
return dst, nil
}