README
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rsync
This is rsync libary in pure golang.
Signature
func GenSign(rd io.Reader, rdLen int64, blockLen uint32, result io.Writer) (err error)
generate signature for rd.
Delta
func GenDelta(dstSig io.Reader, src io.ReadSeeker, srcLen int64, result io.Writer) (err error)
generate delta, and delta will write to result.
Patch
func Patch(deltaRd io.Reader, target io.ReadSeeker, merged io.Writer, args ...bool) (err error)
patch.
rdiff
Documentation
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Index ¶
- Constants
- Variables
- func Assert(c bool, msg string)
- func Assertf(c bool, format string, args ...interface{})
- func Fuzz(odata []byte) int
- func GenDelta(dstSig io.Reader, src io.ReadSeeker, srcLen int64, result io.Writer, ...) (err error)
- func GenSign(rd io.Reader, rdLen int64, blockLen uint32, result io.Writer) (err error)
- func Htonl(l uint32) []byte
- func Htonll(ll uint64) []byte
- func Htons(s uint16) []byte
- func NewRotateBuffer(total int64, blockLen uint32, rd io.Reader) *rotateBuffer
- func Patch(deltaRd io.Reader, target io.ReadSeeker, merged io.Writer, args ...bool) (err error)
- func PatchSelf(deltaRd io.Reader, target io.ReadWriteSeeker, args ...bool) (err error)
- type Patcher
- type SignHdr
- type Signature
Constants ¶
View Source
const ( DeltaMagic uint32 = 0x72730236 BlakeMagic uint32 = 0x72730137 Md4Magic uint32 = 0x72730136 TABLE_SIZE = (1 << 16) NULL_TAG = -1 )
View Source
const ( // RS_OP_LITERAL_Nx与librsync中的定义不同 // RS_OP_LITERAL_Nx = librsync RS_OP_LITERAL_Nx - 0x40 // 这样，使用高位字节来存储数据压缩方式 RS_OP_LITERAL_N1 uint8 = 0x01 RS_OP_LITERAL_N2 uint8 = 0x02 RS_OP_LITERAL_N4 uint8 = 0x03 RS_OP_LITERAL_N8 uint8 = 0x04 // 压缩方式 RS_COMPRESS_NONE uint8 = 0x00 RS_COMPRESS_BZIP2 uint8 = 0x10 RS_COMPRESS_GZIP uint8 = 0x20 RS_COMPRESS_LZW uint8 = 0x30 RS_COMPRESS_FLATE uint8 = 0x40 RS_OP_COPY_N1_N1 uint8 = 0x45 RS_OP_COPY_N1_N2 uint8 = 0x46 RS_OP_COPY_N1_N4 uint8 = 0x47 RS_OP_COPY_N1_N8 uint8 = 0x48 RS_OP_COPY_N2_N1 uint8 = 0x49 RS_OP_COPY_N2_N2 uint8 = 0x4a RS_OP_COPY_N2_N4 uint8 = 0x4b RS_OP_COPY_N2_N8 uint8 = 0x4c RS_OP_COPY_N4_N1 uint8 = 0x4d RS_OP_COPY_N4_N2 uint8 = 0x4e RS_OP_COPY_N4_N4 uint8 = 0x4f RS_OP_COPY_N4_N8 uint8 = 0x50 RS_OP_COPY_N8_N1 uint8 = 0x51 RS_OP_COPY_N8_N2 uint8 = 0x52 RS_OP_COPY_N8_N4 uint8 = 0x53 RS_OP_COPY_N8_N8 uint8 = 0x54 )
Variables ¶
View Source
var (
NotDeltaMagic = errors.New("Not delta file format: magic wrong")
)
Functions ¶
func Fuzz ¶
将输入的data随机分成两部分，一部分作为源，一部分作为目标，最终经过几个步骤后，目标与源相同 1 随机分为两部分， src, dst 2 对dst做signature， dst.sig 3 根据dst.sig和src做delta, dst-src.delta 4 使用dst-src.delta patch dst,得到新的target 5 比较target与src
func GenDelta ¶
func GenDelta(dstSig io.Reader, src io.ReadSeeker, srcLen int64, result io.Writer, args ...bool) (err error)
generate delta param:
dstSig: reader of dst signature file src: reader of src file srcLen: src file content length result: detla file writer
func NewRotateBuffer ¶
total: rotateBuffer's buffer size blockLen: rotateBuffer block size rd: reader, which should feed the rotate buffer
Types ¶
Source Files
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