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Golang lldb.DecodeScalars函数代码示例

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

本文整理汇总了Golang中github.com/cznic/exp/lldb.DecodeScalars函数的典型用法代码示例。如果您正苦于以下问题：Golang DecodeScalars函数的具体用法？Golang DecodeScalars怎么用？Golang DecodeScalars使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。



在下文中一共展示了DecodeScalars函数的18个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的Golang代码示例。

示例1: loadChunks

func (s *file) loadChunks(enc []byte) (v interface{}, err error) {
	items, err := lldb.DecodeScalars(enc)
	if err != nil {
		return
	}

	var ok bool
	var next int64
	switch len(items) {
	case 2:
		// nop
	case 3:
		if next, ok = items[1].(int64); !ok || next == 0 {
			return nil, fmt.Errorf("corrupted DB: first chunk link")
		}
	default:
		return nil, fmt.Errorf("corrupted DB: first chunk")
	}

	typ, ok := items[0].(int64)
	if !ok {
		return nil, fmt.Errorf("corrupted DB: first chunk tag")
	}

	buf, ok := items[len(items)-1].([]byte)
	if !ok {
		return nil, fmt.Errorf("corrupted DB: first chunk data")
	}

	for next != 0 {
		b, err := s.a.Get(nil, next)
		if err != nil {
			return nil, err
		}

		if items, err = lldb.DecodeScalars(b); err != nil {
			return nil, err
		}

		switch len(items) {
		case 1:
			next = 0
		case 2:
			if next, ok = items[0].(int64); !ok {
				return nil, fmt.Errorf("corrupted DB: chunk link")
			}

			b = b[1:]
		default:
			return nil, fmt.Errorf("corrupted DB: chunk items %d (%v)", len(items), items)
		}

		if b, ok = items[0].([]byte); !ok {
			return nil, fmt.Errorf("corrupted DB: chunk data")
		}

		buf = append(buf, b...)
	}
	return s.codec.decode(buf, int(typ))
}
开发者ID:uabassguy，项目名称:ql，代码行数:60，代码来源:file.go


示例2: CreateTemp

func (s *file) CreateTemp(asc bool) (bt temp, err error) {
	f, err := s.tempFile("", "ql-tmp-")
	if err != nil {
		return nil, err
	}

	fn := f.Name()
	filer := lldb.NewOSFiler(f)
	a, err := lldb.NewAllocator(filer, &lldb.Options{})
	if err != nil {
		f.Close()
		os.Remove(fn)
		return nil, err
	}

	k := 1
	if !asc {
		k = -1
	}

	t, _, err := lldb.CreateBTree(a, func(a, b []byte) int { //TODO w/ error return
		da, err := lldb.DecodeScalars(a)
		if err != nil {
			log.Panic(err)
		}

		if err = s.expandBytes(da); err != nil {
			log.Panic(err)
		}

		db, err := lldb.DecodeScalars(b)
		if err != nil {
			log.Panic(err)
		}

		if err = s.expandBytes(db); err != nil {
			log.Panic(err)
		}

		return k * collate(da, db)
	})
	if err != nil {
		f.Close()
		if fn != "" {
			os.Remove(fn)
		}
		return nil, err
	}

	x := &fileTemp{file: &file{
		a:     a,
		codec: newGobCoder(),
		f0:    f,
	},
		t: t}
	return x, nil
}
开发者ID:uabassguy，项目名称:ql，代码行数:57，代码来源:file.go


示例3: freeChunks

func (s *file) freeChunks(enc []byte) (err error) {
	items, err := lldb.DecodeScalars(enc)
	if err != nil {
		return
	}

	var ok bool
	var next int64
	switch len(items) {
	case 2:
		return
	case 3:
		if next, ok = items[1].(int64); !ok || next == 0 {
			return fmt.Errorf("(file-007) corrupted DB: first chunk link")
		}
	default:
		return fmt.Errorf("(file-008) corrupted DB: first chunk")
	}

	for next != 0 {
		s.mu.Lock()
		b, err := s.a.Get(nil, next)
		s.mu.Unlock()
		if err != nil {
			return err
		}

		if items, err = lldb.DecodeScalars(b); err != nil {
			return err
		}

		var h int64
		switch len(items) {
		case 1:
			// nop
		case 2:
			if h, ok = items[0].(int64); !ok {
				return fmt.Errorf("(file-009) corrupted DB: chunk link")
			}

		default:
			return fmt.Errorf("(file-010) corrupted DB: chunk items %d (%v)", len(items), items)
		}

		s.mu.Lock()
		if err = s.a.Free(next); err != nil {
			s.mu.Unlock()
			return err
		}

		s.mu.Unlock()
		next = h
	}
	return
}
开发者ID:pkf，项目名称:ql，代码行数:55，代码来源:file.go


示例4: free

func (s *file) free(h int64, blobCols []*col) (err error) {
	b, err := s.a.Get(nil, h) //LATER +bufs
	if err != nil {
		return
	}

	rec, err := lldb.DecodeScalars(b)
	if err != nil {
		return
	}

	for _, col := range blobCols {
		if col.index >= len(rec) {
			return fmt.Errorf("(file-004) file.free: corrupted DB (record len)")
		}
		if col.index+2 >= len(rec) {
			continue
		}

		switch x := rec[col.index+2].(type) {
		case nil:
			// nop
		case []byte:
			if err = s.freeChunks(x); err != nil {
				return
			}
		}
	}
	defer s.lock()()
	return s.a.Free(h)
}
开发者ID:yifan-gu，项目名称:ql，代码行数:31，代码来源:file.go


示例5: free

func (s *file) free(h int64, blobCols []*col) (err error) {
	b, err := s.a.Get(nil, h) //LATER +bufs
	if err != nil {
		return
	}

	rec, err := lldb.DecodeScalars(b)
	if err != nil {
		return
	}

	for _, col := range blobCols {
		if col.index >= len(rec) {
			return fmt.Errorf("file.free: corrupted DB (record len)")
		}

		var ok bool
		if b, ok = rec[col.index+2].([]byte); !ok {
			return fmt.Errorf("file.free: corrupted DB (chunk []byte)")
		}

		if err = s.freeChunks(b); err != nil {
			return
		}
	}
	return s.a.Free(h)
}
开发者ID:uabassguy，项目名称:ql，代码行数:27，代码来源:file.go


示例6: ParseFromString

func (c *Column) ParseFromString(s string) {
	pairs, err := lldb.DecodeScalars([]byte(s))
	if err != nil {
		log.Fatal(err)
	}
	c.Family = pairs[0].([]byte)
	c.Qual = pairs[1].([]byte)
}
开发者ID:c4pt0r，项目名称:go-hbase，代码行数:8，代码来源:column.go


示例7: Next

func (it *fileBTreeIterator) Next() (k, v []interface{}, err error) {
	bk, bv, err := it.en.Next()
	if err != nil {
		return
	}

	if k, err = lldb.DecodeScalars(bk); err != nil {
		return
	}

	for i, val := range k {
		b, ok := val.([]byte)
		if !ok {
			continue
		}

		c := chunk{it.t.file, b}
		if k[i], err = c.expand(); err != nil {
			return nil, nil, err
		}
	}

	if err = enforce(k, it.t.colsK); err != nil {
		return
	}

	if v, err = lldb.DecodeScalars(bv); err != nil {
		return
	}

	for i, val := range v {
		b, ok := val.([]byte)
		if !ok {
			continue
		}

		c := chunk{it.t.file, b}
		if v[i], err = c.expand(); err != nil {
			return nil, nil, err
		}
	}

	err = enforce(v, it.t.colsV)
	return
}
开发者ID:uabassguy，项目名称:ql，代码行数:45，代码来源:file.go


示例8: collate

func collate(a, b []byte) (r int) {
	da, err := lldb.DecodeScalars(a)
	if err != nil {
		panic(err)
	}

	db, err := lldb.DecodeScalars(b)
	if err != nil {
		panic(err)
	}

	r, err = lldb.Collate(da, db, nil)
	if err != nil {
		panic(err)
	}

	return
}
开发者ID:pmezard，项目名称:exp，代码行数:18，代码来源:etc.go


示例9: Read

func (s *file) Read(dst []interface{}, h int64, cols ...*col) (data []interface{}, err error) { //NTYPE
	if s.wal != nil {
		defer s.rLock()()
	}
	b, err := s.a.Get(nil, h) //LATER +bufs
	if err != nil {
		return
	}

	rec, err := lldb.DecodeScalars(b)
	if err != nil {
		return
	}

	for _, col := range cols {
		i := col.index + 2
		switch col.typ {
		case 0:
		case qBool:
		case qComplex64:
			rec[i] = complex64(rec[i].(complex128))
		case qComplex128:
		case qFloat32:
			rec[i] = float32(rec[i].(float64))
		case qFloat64:
		case qInt8:
			rec[i] = int8(rec[i].(int64))
		case qInt16:
			rec[i] = int16(rec[i].(int64))
		case qInt32:
			rec[i] = int32(rec[i].(int64))
		case qInt64:
		case qString:
		case qUint8:
			rec[i] = uint8(rec[i].(uint64))
		case qUint16:
			rec[i] = uint16(rec[i].(uint64))
		case qUint32:
			rec[i] = uint32(rec[i].(uint64))
		case qUint64:
		case qBlob, qBigInt, qBigRat, qTime, qDuration:
			b, ok := rec[i].([]byte)
			if !ok {
				return nil, fmt.Errorf("corrupted DB: chunk type is not []byte")
			}

			rec[i] = chunk{f: s, b: b}
		default:
			log.Panic("internal error")
		}
	}

	return rec, nil
}
开发者ID:uabassguy，项目名称:ql，代码行数:54，代码来源:file.go


示例10: Next

func (it *fileBTreeIterator) Next() (k, v []interface{}, err error) {
	bk, bv, err := it.en.Next()
	if err != nil {
		return
	}

	if k, err = lldb.DecodeScalars(bk); err != nil {
		return
	}

	if err = enforce(k, it.t.colsK); err != nil {
		return
	}

	if v, err = lldb.DecodeScalars(bv); err != nil {
		return
	}

	err = enforce(v, it.t.colsV)
	return
}
开发者ID:rwcarlsen，项目名称:ql，代码行数:21，代码来源:file.go


示例11: collate

func (s *file) collate(a, b []byte) int { //TODO w/ error return
	da, err := lldb.DecodeScalars(a)
	if err != nil {
		log.Panic(err)
	}

	if err = s.expandBytes(da); err != nil {
		log.Panic(err)
	}

	db, err := lldb.DecodeScalars(b)
	if err != nil {
		log.Panic(err)
	}

	if err = s.expandBytes(db); err != nil {
		log.Panic(err)
	}

	return collate(da, db)
}
开发者ID:pkf，项目名称:ql，代码行数:21，代码来源:file.go


示例12: Get

func (t *fileTemp) Get(k []interface{}) (v []interface{}, err error) {
	bk, err := lldb.EncodeScalars(k...)
	if err != nil {
		return
	}

	bv, err := t.t.Get(nil, bk)
	if err != nil {
		return
	}

	return lldb.DecodeScalars(bv)
}
开发者ID:rwcarlsen，项目名称:ql，代码行数:13，代码来源:file.go


示例13: nextPrev

func (i *fileIndexIterator) nextPrev(f func() ([]byte, []byte, error)) ([]interface{}, int64, error) { //TODO(indices) blobs: +test
	bk, bv, err := f()
	if err != nil {
		return nil, -1, err
	}

	dk, err := lldb.DecodeScalars(bk)
	if err != nil {
		return nil, -1, err
	}

	b, ok := dk[0].([]byte)
	if ok {
		dk[0] = chunk{i.f, b}
		if expand(dk[:1]); err != nil {
			return nil, -1, err
		}
	}

	var k indexKey
	k.value = dk[:len(dk)-1]
	switch i.unique {
	case true:
		if isIndexNull(k.value) {
			return nil, dk[len(dk)-1].(int64), nil
		}

		dv, err := lldb.DecodeScalars(bv)
		if err != nil {
			return nil, -1, err
		}

		return k.value, dv[0].(int64), nil
	default:
		return k.value, dk[len(dk)-1].(int64), nil
	}
}
开发者ID:yifan-gu，项目名称:ql，代码行数:37，代码来源:file.go


示例14: read2

func read2(a *lldb.Allocator, dst []interface{}, h int64, cols ...*col) (data []interface{}, err error) {
	b, err := a.Get(nil, h)
	if err != nil {
		return
	}

	rec, err := lldb.DecodeScalars(b)
	if err != nil {
		return
	}

	for _, col := range cols {
		i := col.index + 2
		switch col.typ {
		case 0:
		case qBool:
		case qComplex64:
			rec[i] = complex64(rec[i].(complex128))
		case qComplex128:
		case qFloat32:
			rec[i] = float32(rec[i].(float64))
		case qFloat64:
		case qInt8:
			rec[i] = int8(rec[i].(int64))
		case qInt16:
			rec[i] = int16(rec[i].(int64))
		case qInt32:
			rec[i] = int32(rec[i].(int64))
		case qInt64:
		case qString:
		case qUint8:
			rec[i] = uint8(rec[i].(uint64))
		case qUint16:
			rec[i] = uint16(rec[i].(uint64))
		case qUint32:
			rec[i] = uint32(rec[i].(uint64))
		case qUint64:
		default:
			log.Panic("internal error")
		}
	}

	return rec, nil
}
开发者ID:rwcarlsen，项目名称:ql，代码行数:44，代码来源:file.go


示例15: Get

func (t *fileTemp) Get(k []interface{}) (v []interface{}, err error) {
	if err = expand(k); err != nil {
		return
	}

	if err = t.flatten(k); err != nil {
		return nil, err
	}

	bk, err := lldb.EncodeScalars(k...)
	if err != nil {
		return
	}

	bv, err := t.t.Get(nil, bk)
	if err != nil {
		return
	}

	return lldb.DecodeScalars(bv)
}
开发者ID:uabassguy，项目名称:ql，代码行数:21，代码来源:file.go


示例16: infer

//NTYPE
func infer(from []interface{}, to *[]*col) {
	if len(*to) == 0 {
		*to = make([]*col, len(from))
		for i := range *to {
			(*to)[i] = &col{}
		}
	}
	for i, c := range *to {
		if f := from[i]; f != nil {
			switch x := f.(type) {
			//case nil:
			case idealComplex:
				c.typ = qComplex128
				from[i] = complex128(x)
			case idealFloat:
				c.typ = qFloat64
				from[i] = float64(x)
			case idealInt:
				c.typ = qInt64
				from[i] = int64(x)
			case idealRune:
				c.typ = qInt32
				from[i] = int32(x)
			case idealUint:
				c.typ = qUint64
				from[i] = uint64(x)
			case bool:
				c.typ = qBool
			case complex128:
				c.typ = qComplex128
			case complex64:
				c.typ = qComplex64
			case float64:
				c.typ = qFloat64
			case float32:
				c.typ = qFloat32
			case int8:
				c.typ = qInt8
			case int16:
				c.typ = qInt16
			case int32:
				c.typ = qInt32
			case int64:
				c.typ = qInt64
			case string:
				c.typ = qString
			case uint8:
				c.typ = qUint8
			case uint16:
				c.typ = qUint16
			case uint32:
				c.typ = qUint32
			case uint64:
				c.typ = qUint64
			case []byte:
				c.typ = qBlob
			case *big.Int:
				c.typ = qBigInt
			case *big.Rat:
				c.typ = qBigRat
			case time.Time:
				c.typ = qTime
			case time.Duration:
				c.typ = qDuration
			case chunk:
				vals, err := lldb.DecodeScalars([]byte(x.b))
				if err != nil {
					log.Panic("err")
				}

				if len(vals) == 0 {
					log.Panic("internal error")
				}

				i, ok := vals[0].(int64)
				if !ok {
					log.Panic("internal error")
				}

				c.typ = int(i)
			default:
				log.Panic("internal error")
			}
		}
	}
}
开发者ID:uabassguy，项目名称:ql，代码行数:87，代码来源:file.go


示例17: Read

func (s *file) Read(dst []interface{}, h int64, cols ...*col) (data []interface{}, err error) { //NTYPE
	b, err := s.a.Get(nil, h) //LATER +bufs
	if err != nil {
		return
	}

	rec, err := lldb.DecodeScalars(b)
	if err != nil {
		return
	}

	for _, col := range cols {
		i := col.index + 2
		if i >= len(rec) || rec[i] == nil {
			continue
		}

		switch col.typ {
		case 0:
		case qBool:
		case qComplex64:
			rec[i] = complex64(rec[i].(complex128))
		case qComplex128:
		case qFloat32:
			rec[i] = float32(rec[i].(float64))
		case qFloat64:
		case qInt8:
			rec[i] = int8(rec[i].(int64))
		case qInt16:
			rec[i] = int16(rec[i].(int64))
		case qInt32:
			rec[i] = int32(rec[i].(int64))
		case qInt64:
		case qString:
		case qUint8:
			rec[i] = uint8(rec[i].(uint64))
		case qUint16:
			rec[i] = uint16(rec[i].(uint64))
		case qUint32:
			rec[i] = uint32(rec[i].(uint64))
		case qUint64:
		case qBlob, qBigInt, qBigRat, qTime, qDuration:
			switch x := rec[i].(type) {
			case []byte:
				rec[i] = chunk{f: s, b: x}
			default:
				return nil, fmt.Errorf("(file-006) corrupted DB: non nil chunk type is not []byte")
			}
		default:
			panic("internal error 045")
		}
	}

	if cols != nil {
		for n, dn := len(cols)+2, len(rec); dn < n; dn++ {
			rec = append(rec, nil)
		}
	}

	return rec, nil
}
开发者ID:yifan-gu，项目名称:ql，代码行数:61，代码来源:file.go


示例18: Do

// Do calls f for every subscripts-value pair in s in ascending collation order
// of the subscripts.  Do returns non nil error for general errors (eg. file
// read error).  If f returns false or a non nil error then Do terminates and
// returns the value of error from f.
//
// Note: f can get called with a subscripts-value pair which actually may no
// longer exist - if some other goroutine introduces such data race.
// Coordination required to avoid this situation, if applicable/desirable, must
// be provided by the client of dbm.
func (s *Slice) Do(f func(subscripts, value []interface{}) (bool, error)) (err error) {
	var (
		db    = s.a.db
		noVal bool
	)

	if err = db.enter(); err != nil {
		return
	}

	doLeave := true
	defer func() {
		if doLeave {
			db.leave(&err)
		}
	}()

	ok, err := s.a.validate(false)
	if !ok {
		return err
	}

	tree := s.a.tree
	if !tree.IsMem() && tree.Handle() == 1 {
		noVal = true
	}

	switch {
	case s.from == nil && s.to == nil:
		bprefix, err := lldb.EncodeScalars(s.prefix...)
		if err != nil {
			return err
		}

		enum, _, err := tree.Seek(bprefix)
		if err != nil {
			return noEof(err)
		}

		for {
			bk, bv, err := enum.Next()
			if err != nil {
				return noEof(err)
			}

			k, err := lldb.DecodeScalars(bk)
			if err != nil {
				return noEof(err)
			}

			if n := len(s.prefix); n != 0 {
				if len(k) < len(s.prefix) {
					return nil
				}

				c, err := lldb.Collate(k[:n], s.prefix, nil)
				if err != nil {
					return err
				}

				if c > 0 {
					return nil
				}
			}

			v, err := lldb.DecodeScalars(bv)
			if err != nil {
				return err
			}

			doLeave = false
			if db.leave(&err) != nil {
				return err
			}

			if noVal && v != nil {
				v = []interface{}{0}
			}
			if more, err := f(k[len(s.prefix):], v); !more || err != nil {
				return noEof(err)
			}

			if err = db.enter(); err != nil {
				return err
			}

			doLeave = true
		}
	case s.from == nil && s.to != nil:
		bprefix, err := lldb.EncodeScalars(s.prefix...)
		if err != nil {
//.........这里部分代码省略.........
开发者ID:pmezard，项目名称:exp，代码行数:101，代码来源:slice.go



注：本文中的github.com/cznic/exp/lldb.DecodeScalars函数示例整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

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Golang lldb.EncodeScalars函数代码示例发布时间：2022-05-23
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