Golang Logger.DecodeError方法代碼示例

// Read the first bytes of the given byte slice to return the LBTYPE.
func GetType(x []byte, debug *gubed.Logger) (typ LBTYPE) {
	if len(x) < LBTYPE_SIZE {
		debug.Error(FmtErrSliceTooSmall(x, LBTYPE_SIZE))
	}
	bfr := bufio.NewReader(bytes.NewBuffer(x[:LBTYPE_SIZE]))
	debug.DecodeError(binary.Read(bfr, BIGEND, &typ))
	return
}

// Map GenericRecord to a new IndexRecord.
func (rec *GenericRecord) ToIndexRecord(debug *gubed.Logger) *IndexRecord {
	irec := NewIndexRecord()
	irec.ksz = rec.ksz
	irec.kbyts = rec.kbyts
	irec.ktype = rec.ktype
	// Unpack
	bfr := bufio.NewReader(bytes.NewBuffer(rec.vbyts))
	debug.DecodeError(binary.Read(bfr, BIGEND, &irec.vsz))
	debug.DecodeError(binary.Read(bfr, BIGEND, &irec.vpos))
	return irec
}

func (fmap *FieldMap) FromBytes(bfr *bytes.Buffer, debug *gubed.Logger) (err error) {
	var size LBUINT
	var label string
	var vtype LBTYPE
	var bits []byte
	for bfr.Len() > 0 {
		err = debug.DecodeError(binary.Read(bfr, BIGEND, &size)) // label size
		if err == io.EOF {
			break
		} else {
			if err != nil {
				return
			}
		}
		bits = make([]byte, int(size))
		err = debug.DecodeError(binary.Read(bfr, BIGEND, &bits))
		if err == io.EOF {
			break
		} else {
			if err != nil {
				return
			}
		}
		label = string(bits)                                     // label
		err = debug.DecodeError(binary.Read(bfr, BIGEND, &size)) // value size
		if err == io.EOF {
			break
		} else {
			if err != nil {
				return
			}
		}
		bits = make([]byte, int(size)-LBTYPE_SIZE)
		err = debug.DecodeError(binary.Read(bfr, BIGEND, &vtype)) // LBTYPE
		if err == io.EOF {
			break
		} else {
			if err != nil {
				return
			}
		}
		err = debug.DecodeError(binary.Read(bfr, BIGEND, &bits))
		fmap.fields[label] = MakeField(bits, vtype)
		if err == io.EOF {
			break
		} else {
			if err != nil {
				return
			}
		}
	}
	return
}

// Map GenericRecord to a new LogRecord.
func (rec *GenericRecord) ToLogRecord(debug *gubed.Logger) *LogRecord {
	lrec := NewLogRecord()
	lrec.ksz = rec.ksz
	lrec.vsz = rec.vsz - CRC_SIZE
	lrec.kbyts = rec.kbyts
	lrec.ktype = rec.ktype
	lrec.vtype = rec.vtype
	// Unpack
	bfr := bufio.NewReader(bytes.NewBuffer(rec.vbyts))
	// Note that the generic vsz includes the LBTYPE prefix
	lrec.vbyts = make([]byte, int(lrec.vsz)-LBTYPE_SIZE) // must have fixed size
	debug.DecodeError(binary.Read(bfr, BIGEND, &lrec.vbyts))
	debug.DecodeError(binary.Read(bfr, BIGEND, &lrec.crc))
	return lrec
}

// Map GenericRecord to a new MasterLogRecord.
func (rec *GenericRecord) ToValueLocation(debug *gubed.Logger) (interface{}, *ValueLocation) {
	key, err := MakeKey(rec.kbyts, rec.ktype, debug)
	debug.Error(err)
	vbyts, _ := rec.GetValueAndType(MASTER_RECORD, debug)
	vloc := NewValueLocation()
	// Unpack
	bfr := bufio.NewReader(bytes.NewBuffer(vbyts))
	debug.DecodeError(binary.Read(bfr, BIGEND, &vloc.fnum))
	debug.DecodeError(binary.Read(bfr, BIGEND, &vloc.vsz))
	debug.DecodeError(binary.Read(bfr, BIGEND, &vloc.vpos))
	return key, vloc
}

// Map GenericRecord to a new ZapRecord list.
func (rec *GenericRecord) ToZapRecordList(debug *gubed.Logger) (interface{}, []*ZapRecord) {
	key, err := MakeKey(rec.kbyts, rec.ktype, debug)
	debug.Error(err)
	n := rec.LocationListLength()
	bfr := bufio.NewReader(bytes.NewBuffer(rec.vbyts))
	var zrecs = make([]*ZapRecord, n)
	for i := 0; i < n; i++ {
		zrecs[i] = NewZapRecord()
		debug.DecodeError(binary.Read(bfr, BIGEND, &zrecs[i].fnum))
		debug.DecodeError(binary.Read(bfr, BIGEND, &zrecs[i].rsz))
		debug.DecodeError(binary.Read(bfr, BIGEND, &zrecs[i].rpos))
	}
	return key, zrecs
}

// Read an CATID from a byte slice.
func BytesToCatalogId(byts []byte, debug *gubed.Logger) (interface{}, error) {
	bfr := bytes.NewBuffer(byts)
	var cid CATID_TYPE
	err := debug.DecodeError(binary.Read(bfr, BIGEND, &cid))
	return cid, err
}

func SnipKeyType(key []byte, debug *gubed.Logger) (newkey []byte, ktype LBTYPE) {
	bfr := bufio.NewReader(bytes.NewBuffer(key[:LBTYPE_SIZE]))
	debug.DecodeError(binary.Read(bfr, BIGEND, &ktype))
	newkey = key[LBTYPE_SIZE:]
	return
}