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

38 lines
836 B
Go

package sarama
import (
"encoding/binary"
"fmt"
"hash/crc32"
)
// crc32Field implements the pushEncoder and pushDecoder interfaces for calculating CRC32s.
type crc32Field struct {
startOffset int
}
func (c *crc32Field) saveOffset(in int) {
c.startOffset = in
}
func (c *crc32Field) reserveLength() int {
return 4
}
func (c *crc32Field) run(curOffset int, buf []byte) error {
crc := crc32.ChecksumIEEE(buf[c.startOffset+4 : curOffset])
binary.BigEndian.PutUint32(buf[c.startOffset:], crc)
return nil
}
func (c *crc32Field) check(curOffset int, buf []byte) error {
crc := crc32.ChecksumIEEE(buf[c.startOffset+4 : curOffset])
expected := binary.BigEndian.Uint32(buf[c.startOffset:])
if crc != expected {
return PacketDecodingError{fmt.Sprintf("CRC didn't match expected %#x got %#x", expected, crc)}
}
return nil
}