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[#49] util/proto: Calculate repeated field size without allocations

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Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
This commit is contained in:
Evgenii Stratonikov 2023-07-26 17:52:54 +03:00
parent 59c8421597
commit 849de02bc3
1 changed files with 27 additions and 73 deletions
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100
util/proto/marshal.go
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@ -178,30 +178,13 @@ func RepeatedStringSize(field int, v []string) (size int) {
return size return size
} }
func RepeatedUInt64Marshal(field int, buf []byte, v []uint64) int { func repeatedUIntSize[T ~uint64 | ~int64 | ~uint32 | ~int32](field int, v []T) (size, arraySize int) {
if len(v) == 0 {
return 0
}
prefix := field<<3 | 0x02
offset := binary.PutUvarint(buf, uint64(prefix))
_, arrSize := RepeatedUInt64Size(field, v)
offset += binary.PutUvarint(buf[offset:], uint64(arrSize))
for i := range v {
offset += binary.PutUvarint(buf[offset:], v[i])
}
return offset
}
func RepeatedUInt64Size(field int, v []uint64) (size, arraySize int) {
if len(v) == 0 { if len(v) == 0 {
return 0, 0 return 0, 0
} }
for i := range v { for i := range v {
size += VarUIntSize(v[i]) size += VarUIntSize(uint64(v[i]))
} }
arraySize = size arraySize = size
@ -213,82 +196,53 @@ func RepeatedUInt64Size(field int, v []uint64) (size, arraySize int) {
return size, arraySize return size, arraySize
} }
func RepeatedInt64Marshal(field int, buf []byte, v []int64) int { func repeatedUIntMarshal[T ~uint64 | ~int64 | ~uint32 | ~int32](field int, buf []byte, v []T) int {
if len(v) == 0 { if len(v) == 0 {
return 0 return 0
} }
convert := make([]uint64, len(v)) prefix := field<<3 | 0x02
offset := binary.PutUvarint(buf, uint64(prefix))
_, arrSize := repeatedUIntSize(field, v)
offset += binary.PutUvarint(buf[offset:], uint64(arrSize))
for i := range v { for i := range v {
convert[i] = uint64(v[i]) offset += binary.PutUvarint(buf[offset:], uint64(v[i]))
} }
return RepeatedUInt64Marshal(field, buf, convert) return offset
}
func RepeatedUInt64Marshal(field int, buf []byte, v []uint64) int {
return repeatedUIntMarshal(field, buf, v)
}
func RepeatedUInt64Size(field int, v []uint64) (size, arraySize int) {
return repeatedUIntSize(field, v)
}
func RepeatedInt64Marshal(field int, buf []byte, v []int64) int {
return repeatedUIntMarshal(field, buf, v)
} }
func RepeatedInt64Size(field int, v []int64) (size, arraySize int) { func RepeatedInt64Size(field int, v []int64) (size, arraySize int) {
if len(v) == 0 { return repeatedUIntSize(field, v)
return 0, 0
}
convert := make([]uint64, len(v))
for i := range v {
convert[i] = uint64(v[i])
}
return RepeatedUInt64Size(field, convert)
} }
func RepeatedUInt32Marshal(field int, buf []byte, v []uint32) int { func RepeatedUInt32Marshal(field int, buf []byte, v []uint32) int {
if len(v) == 0 { return repeatedUIntMarshal(field, buf, v)
return 0
}
convert := make([]uint64, len(v))
for i := range v {
convert[i] = uint64(v[i])
}
return RepeatedUInt64Marshal(field, buf, convert)
} }
func RepeatedUInt32Size(field int, v []uint32) (size, arraySize int) { func RepeatedUInt32Size(field int, v []uint32) (size, arraySize int) {
if len(v) == 0 { return repeatedUIntSize(field, v)
return 0, 0
}
convert := make([]uint64, len(v))
for i := range v {
convert[i] = uint64(v[i])
}
return RepeatedUInt64Size(field, convert)
} }
func RepeatedInt32Marshal(field int, buf []byte, v []int32) int { func RepeatedInt32Marshal(field int, buf []byte, v []int32) int {
if len(v) == 0 { return repeatedUIntMarshal(field, buf, v)
return 0
}
convert := make([]uint64, len(v))
for i := range v {
convert[i] = uint64(v[i])
}
return RepeatedUInt64Marshal(field, buf, convert)
} }
func RepeatedInt32Size(field int, v []int32) (size, arraySize int) { func RepeatedInt32Size(field int, v []int32) (size, arraySize int) {
if len(v) == 0 { return repeatedUIntSize(field, v)
return 0, 0
}
convert := make([]uint64, len(v))
for i := range v {
convert[i] = uint64(v[i])
}
return RepeatedUInt64Size(field, convert)
} }
// VarUIntSize returns length of varint byte sequence for uint64 value 'x'. // VarUIntSize returns length of varint byte sequence for uint64 value 'x'.