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package sarama
import (
"encoding/binary"
"errors"
"math"
"github.com/rcrowley/go-metrics"
)
type realEncoder struct {
raw []byte
off int
stack []pushEncoder
registry metrics.Registry
}
// primitives
func (re *realEncoder) putInt8(in int8) {
re.raw[re.off] = byte(in)
re.off++
}
func (re *realEncoder) putInt16(in int16) {
binary.BigEndian.PutUint16(re.raw[re.off:], uint16(in))
re.off += 2
}
func (re *realEncoder) putInt32(in int32) {
binary.BigEndian.PutUint32(re.raw[re.off:], uint32(in))
re.off += 4
}
func (re *realEncoder) putInt64(in int64) {
binary.BigEndian.PutUint64(re.raw[re.off:], uint64(in))
re.off += 8
}
func (re *realEncoder) putVarint(in int64) {
re.off += binary.PutVarint(re.raw[re.off:], in)
}
func (re *realEncoder) putUVarint(in uint64) {
re.off += binary.PutUvarint(re.raw[re.off:], in)
}
func (re *realEncoder) putFloat64(in float64) {
binary.BigEndian.PutUint64(re.raw[re.off:], math.Float64bits(in))
re.off += 8
}
func (re *realEncoder) putArrayLength(in int) error {
re.putInt32(int32(in))
return nil
}
func (re *realEncoder) putCompactArrayLength(in int) {
// 0 represents a null array, so +1 has to be added
re.putUVarint(uint64(in + 1))
}
func (re *realEncoder) putBool(in bool) {
if in {
re.putInt8(1)
return
}
re.putInt8(0)
}
// collection
func (re *realEncoder) putRawBytes(in []byte) error {
copy(re.raw[re.off:], in)
re.off += len(in)
return nil
}
func (re *realEncoder) putBytes(in []byte) error {
if in == nil {
re.putInt32(-1)
return nil
}
re.putInt32(int32(len(in)))
return re.putRawBytes(in)
}
func (re *realEncoder) putVarintBytes(in []byte) error {
if in == nil {
re.putVarint(-1)
return nil
}
re.putVarint(int64(len(in)))
return re.putRawBytes(in)
}
func (re *realEncoder) putCompactBytes(in []byte) error {
re.putUVarint(uint64(len(in) + 1))
return re.putRawBytes(in)
}
func (re *realEncoder) putCompactString(in string) error {
re.putCompactArrayLength(len(in))
return re.putRawBytes([]byte(in))
}
func (re *realEncoder) putNullableCompactString(in *string) error {
if in == nil {
re.putInt8(0)
return nil
}
return re.putCompactString(*in)
}
func (re *realEncoder) putString(in string) error {
re.putInt16(int16(len(in)))
copy(re.raw[re.off:], in)
re.off += len(in)
return nil
}
func (re *realEncoder) putNullableString(in *string) error {
if in == nil {
re.putInt16(-1)
return nil
}
return re.putString(*in)
}
func (re *realEncoder) putStringArray(in []string) error {
err := re.putArrayLength(len(in))
if err != nil {
return err
}
for _, val := range in {
if err := re.putString(val); err != nil {
return err
}
}
return nil
}
func (re *realEncoder) putCompactInt32Array(in []int32) error {
if in == nil {
return errors.New("expected int32 array to be non null")
}
// 0 represents a null array, so +1 has to be added
re.putUVarint(uint64(len(in)) + 1)
for _, val := range in {
re.putInt32(val)
}
return nil
}
func (re *realEncoder) putNullableCompactInt32Array(in []int32) error {
if in == nil {
re.putUVarint(0)
return nil
}
// 0 represents a null array, so +1 has to be added
re.putUVarint(uint64(len(in)) + 1)
for _, val := range in {
re.putInt32(val)
}
return nil
}
func (re *realEncoder) putInt32Array(in []int32) error {
err := re.putArrayLength(len(in))
if err != nil {
return err
}
for _, val := range in {
re.putInt32(val)
}
return nil
}
func (re *realEncoder) putInt64Array(in []int64) error {
err := re.putArrayLength(len(in))
if err != nil {
return err
}
for _, val := range in {
re.putInt64(val)
}
return nil
}
func (re *realEncoder) putEmptyTaggedFieldArray() {
re.putUVarint(0)
}
func (re *realEncoder) offset() int {
return re.off
}
// stacks
func (re *realEncoder) push(in pushEncoder) {
in.saveOffset(re.off)
re.off += in.reserveLength()
re.stack = append(re.stack, in)
}
func (re *realEncoder) pop() error {
// this is go's ugly pop pattern (the inverse of append)
in := re.stack[len(re.stack)-1]
re.stack = re.stack[:len(re.stack)-1]
return in.run(re.off, re.raw)
}
// we do record metrics during the real encoder pass
func (re *realEncoder) metricRegistry() metrics.Registry {
return re.registry
}
|
