154 lines
2.7 KiB
Go
154 lines
2.7 KiB
Go
package sarama
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import (
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"encoding/binary"
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"fmt"
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"math"
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"github.com/rcrowley/go-metrics"
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)
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type prepEncoder struct {
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stack []pushEncoder
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length int
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}
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// primitives
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func (pe *prepEncoder) putInt8(in int8) {
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pe.length++
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}
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func (pe *prepEncoder) putInt16(in int16) {
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pe.length += 2
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}
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func (pe *prepEncoder) putInt32(in int32) {
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pe.length += 4
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}
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func (pe *prepEncoder) putInt64(in int64) {
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pe.length += 8
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}
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func (pe *prepEncoder) putVarint(in int64) {
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var buf [binary.MaxVarintLen64]byte
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pe.length += binary.PutVarint(buf[:], in)
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}
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func (pe *prepEncoder) putArrayLength(in int) error {
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if in > math.MaxInt32 {
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return PacketEncodingError{fmt.Sprintf("array too long (%d)", in)}
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}
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pe.length += 4
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return nil
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}
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func (pe *prepEncoder) putBool(in bool) {
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pe.length++
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}
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// arrays
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func (pe *prepEncoder) putBytes(in []byte) error {
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pe.length += 4
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if in == nil {
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return nil
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}
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return pe.putRawBytes(in)
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}
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func (pe *prepEncoder) putVarintBytes(in []byte) error {
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if in == nil {
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pe.putVarint(-1)
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return nil
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}
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pe.putVarint(int64(len(in)))
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return pe.putRawBytes(in)
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}
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func (pe *prepEncoder) putRawBytes(in []byte) error {
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if len(in) > math.MaxInt32 {
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return PacketEncodingError{fmt.Sprintf("byteslice too long (%d)", len(in))}
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}
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pe.length += len(in)
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return nil
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}
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func (pe *prepEncoder) putNullableString(in *string) error {
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if in == nil {
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pe.length += 2
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return nil
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}
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return pe.putString(*in)
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}
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func (pe *prepEncoder) putString(in string) error {
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pe.length += 2
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if len(in) > math.MaxInt16 {
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return PacketEncodingError{fmt.Sprintf("string too long (%d)", len(in))}
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}
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pe.length += len(in)
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return nil
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}
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func (pe *prepEncoder) putStringArray(in []string) error {
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err := pe.putArrayLength(len(in))
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if err != nil {
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return err
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}
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for _, str := range in {
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if err := pe.putString(str); err != nil {
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return err
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}
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}
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return nil
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}
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func (pe *prepEncoder) putInt32Array(in []int32) error {
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err := pe.putArrayLength(len(in))
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if err != nil {
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return err
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}
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pe.length += 4 * len(in)
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return nil
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}
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func (pe *prepEncoder) putInt64Array(in []int64) error {
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err := pe.putArrayLength(len(in))
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if err != nil {
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return err
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}
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pe.length += 8 * len(in)
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return nil
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}
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func (pe *prepEncoder) offset() int {
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return pe.length
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}
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// stackable
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func (pe *prepEncoder) push(in pushEncoder) {
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in.saveOffset(pe.length)
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pe.length += in.reserveLength()
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pe.stack = append(pe.stack, in)
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}
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func (pe *prepEncoder) pop() error {
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in := pe.stack[len(pe.stack)-1]
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pe.stack = pe.stack[:len(pe.stack)-1]
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if dpe, ok := in.(dynamicPushEncoder); ok {
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pe.length += dpe.adjustLength(pe.length)
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}
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return nil
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}
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// we do not record metrics during the prep encoder pass
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func (pe *prepEncoder) metricRegistry() metrics.Registry {
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return nil
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}
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