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Golang util.BytesToUint64函數代碼示例

本文整理匯總了Golang中code/google/com/p/weed-fs/go/util.BytesToUint64函數的典型用法代碼示例。如果您正苦於以下問題:Golang BytesToUint64函數的具體用法?Golang BytesToUint64怎麽用?Golang BytesToUint64使用的例子?那麽, 這裏精選的函數代碼示例或許可以為您提供幫助。


在下文中一共展示了BytesToUint64函數的7個代碼示例,這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚,您的評價將有助於係統推薦出更棒的Golang代碼示例。

示例1: LoadNeedleMap

func LoadNeedleMap(file *os.File) (*NeedleMap, error) {
	nm := NewNeedleMap(file)
	bytes := make([]byte, 16*RowsToRead)
	count, e := nm.indexFile.Read(bytes)
	for count > 0 && e == nil {
		for i := 0; i < count; i += 16 {
			key := util.BytesToUint64(bytes[i : i+8])
			offset := util.BytesToUint32(bytes[i+8 : i+12])
			size := util.BytesToUint32(bytes[i+12 : i+16])
			nm.fileCounter++
			nm.fileByteCounter = nm.fileByteCounter + uint64(size)
			if offset > 0 {
				oldSize := nm.m.Set(Key(key), offset, size)
				//log.Println("reading key", key, "offset", offset, "size", size, "oldSize", oldSize)
				if oldSize > 0 {
					nm.deletionCounter++
					nm.deletionByteCounter = nm.deletionByteCounter + uint64(oldSize)
				}
			} else {
				oldSize := nm.m.Delete(Key(key))
				//log.Println("removing key", key, "offset", offset, "size", size, "oldSize", oldSize)
				nm.deletionCounter++
				nm.deletionByteCounter = nm.deletionByteCounter + uint64(oldSize)
			}
		}

		count, e = nm.indexFile.Read(bytes)
	}
	return nm, e
}
開發者ID:abasse,項目名稱:weed-fs,代碼行數:30,代碼來源:needle_map.go

示例2: readNeedleDataVersion2

func (n *Needle) readNeedleDataVersion2(bytes []byte) {
	index, lenBytes := 0, len(bytes)
	if index < lenBytes {
		n.DataSize = util.BytesToUint32(bytes[index : index+4])
		index = index + 4
		n.Data = bytes[index : index+int(n.DataSize)]
		index = index + int(n.DataSize)
		n.Flags = bytes[index]
		index = index + 1
	}
	if index < lenBytes && n.HasName() {
		n.NameSize = uint8(bytes[index])
		index = index + 1
		n.Name = bytes[index : index+int(n.NameSize)]
		index = index + int(n.NameSize)
	}
	if index < lenBytes && n.HasMime() {
		n.MimeSize = uint8(bytes[index])
		index = index + 1
		n.Mime = bytes[index : index+int(n.MimeSize)]
		index = index + int(n.MimeSize)
	}
	if index < lenBytes && n.HasLastModifiedDate() {
		n.LastModified = util.BytesToUint64(bytes[index : index+LastModifiedBytesLength])
		index = index + LastModifiedBytesLength
	}
}
開發者ID:pipul,項目名稱:weed-fs,代碼行數:27,代碼來源:needle_read_write.go

示例3: Visit

func (m cdbMap) Visit(visit func(NeedleValue) error) (err error) {
	fh, err := os.Open(m.fn1)
	if err != nil {
		return fmt.Errorf("cannot open %s: %s", m.fn1, err)
	}
	defer fh.Close()
	walk := func(elt cdb.Element) error {
		if len(elt.Key) != 8 {
			return nil
		}
		return visit(NeedleValue{Key: Key(util.BytesToUint64(elt.Key)),
			Offset: util.BytesToUint32(elt.Data[:4]),
			Size:   util.BytesToUint32(elt.Data[4:8])})
	}
	if err = cdb.DumpMap(fh, walk); err != nil {
		return err
	}
	if m.c2 == nil {
		return nil
	}
	fh.Close()
	if fh, err = os.Open(m.fn2); err != nil {
		return fmt.Errorf("cannot open %s: %s", m.fn2, err)
	}
	return cdb.DumpMap(fh, walk)
}
開發者ID:screscent,項目名稱:weedfs,代碼行數:26,代碼來源:cdb_map.go

示例4: WalkIndexFile

// walks through the index file, calls fn function with each key, offset, size
// stops with the error returned by the fn function
func WalkIndexFile(r *os.File, fn func(key uint64, offset, size uint32) error) error {
	var readerOffset int64
	bytes := make([]byte, 16*RowsToRead)
	count, e := r.ReadAt(bytes, readerOffset)
	glog.V(3).Infoln("file", r.Name(), "readerOffset", readerOffset, "count", count, "e", e)
	readerOffset += int64(count)
	var (
		key          uint64
		offset, size uint32
		i            int
	)

	for count > 0 && e == nil || e == io.EOF {
		for i = 0; i+16 <= count; i += 16 {
			key = util.BytesToUint64(bytes[i : i+8])
			offset = util.BytesToUint32(bytes[i+8 : i+12])
			size = util.BytesToUint32(bytes[i+12 : i+16])
			if e = fn(key, offset, size); e != nil {
				return e
			}
		}
		if e == io.EOF {
			return nil
		}
		count, e = r.ReadAt(bytes, readerOffset)
		glog.V(3).Infoln("file", r.Name(), "readerOffset", readerOffset, "count", count, "e", e)
		readerOffset += int64(count)
	}
	return e
}
開發者ID:hanlz,項目名稱:weed-fs,代碼行數:32,代碼來源:needle_map.go

示例5: walkIndexFile

// walks through the index file, calls fn function with each key, offset, size
// stops with the error returned by the fn function
func walkIndexFile(r io.Reader, fn func(key uint64, offset, size uint32) error) error {
	br := bufio.NewReaderSize(r, 1024*1024)
	bytes := make([]byte, 16*RowsToRead)
	count, e := br.Read(bytes)
	var (
		key          uint64
		offset, size uint32
		i            int
	)

	for count > 0 && e == nil {
		for i = 0; i+16 <= count; i += 16 {
			key = util.BytesToUint64(bytes[i : i+8])
			offset = util.BytesToUint32(bytes[i+8 : i+12])
			size = util.BytesToUint32(bytes[i+12 : i+16])
			if e = fn(key, offset, size); e != nil {
				return e
			}
		}
		if count%16 != 0 {
			copy(bytes[:count-i], bytes[i:count])
			i = count - i
			count, e = br.Read(bytes[i:])
			count += i
		} else {
			count, e = br.Read(bytes)
		}
	}
	if e == io.EOF {
		return nil
	}
	return e
}
開發者ID:asdf20122012,項目名稱:weed-fs,代碼行數:35,代碼來源:needle_map.go

示例6: ParseKeyHash

func ParseKeyHash(key_hash_string string) (uint64, uint32) {
	key_hash_bytes, khe := hex.DecodeString(key_hash_string)
	key_hash_len := len(key_hash_bytes)
	if khe != nil || key_hash_len <= 4 {
		glog.V(0).Infoln("Invalid key_hash", key_hash_string, "length:", key_hash_len, "error", khe)
		return 0, 0
	}
	key := util.BytesToUint64(key_hash_bytes[0 : key_hash_len-4])
	hash := util.BytesToUint32(key_hash_bytes[key_hash_len-4 : key_hash_len])
	return key, hash
}
開發者ID:asdf20122012,項目名稱:weed-fs,代碼行數:11,代碼來源:needle.go

示例7: readNeedleHeader

func (n *Needle) readNeedleHeader(bytes []byte) {
	n.Cookie = util.BytesToUint32(bytes[0:4])
	n.Id = util.BytesToUint64(bytes[4:12])
	n.Size = util.BytesToUint32(bytes[12:NeedleHeaderSize])
}
開發者ID:pipul,項目名稱:weed-fs,代碼行數:5,代碼來源:needle_read_write.go


注:本文中的code/google/com/p/weed-fs/go/util.BytesToUint64函數示例由純淨天空整理自Github/MSDocs等開源代碼及文檔管理平台,相關代碼片段篩選自各路編程大神貢獻的開源項目,源碼版權歸原作者所有,傳播和使用請參考對應項目的License;未經允許,請勿轉載。