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