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Add coder/decoder size to coder

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This commit is contained in:
PhatPhuckDave
2024-07-31 13:05:13 +02:00
parent 7001f2c51a
commit d0c868ca5c
4 changed files with 22 additions and 13 deletions
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7
encoding/ascii.go
View File

@@ -13,3 +13,10 @@ func (c *ASCIICoder) Encode(s *string, buf *bytes.Buffer) error {
func (c *ASCIICoder) Decode(buf *bytes.Buffer) (string, error) {
return buf.String(), nil
}
func (c ASCIICoder) EncodesInto(s *string) int {
return len(*s)
}
func (c ASCIICoder) DecodesInto(buf *bytes.Buffer) int {
return buf.Len()
}

4
encoding/coder.go
View File

@@ -5,4 +5,6 @@ import "bytes"
type Coder interface {
Encode(s *string, buf *bytes.Buffer) error
Decode(buf *bytes.Buffer) (string, error)
}
EncodesInto(s *string) int
DecodesInto(buf *bytes.Buffer) int
}

8
encoding/gsm7.go
View File

@@ -19,7 +19,7 @@ func (c *GSM7Coder) Encode(s *string, buf *bytes.Buffer) error {
bitshift byte = 0
leap, shift bool
)
encodedSize := GSM7EncodesInto(s)
encodedSize := c.EncodesInto(s)
cap := buf.Cap()
if cap < encodedSize {
buf.Grow(encodedSize - cap)
@@ -77,7 +77,7 @@ func (c *GSM7Coder) Decode(buf *bytes.Buffer) (string, error) {
bitshift byte = 0
leap bool
)
outLength := GSM7DecodesInto(buf)
outLength := c.DecodesInto(buf)
lengthDiff := outLength - len(gsm7)
gsm7 = append(gsm7, make([]byte, lengthDiff)...)
start := len(gsm7) - 2
@@ -121,7 +121,7 @@ func InsertAt(data *[]byte, index int, value byte) {
(*data)[index] = value
}
func GSM7EncodesInto(s *string) int {
func (c GSM7Coder) EncodesInto(s *string) int {
slen := len(*s)
enclen := slen * 7 / 8
if slen%8 != 0 {
@@ -129,7 +129,7 @@ func GSM7EncodesInto(s *string) int {
}
return enclen
}
func GSM7DecodesInto(buf *bytes.Buffer) int {
func (c GSM7Coder) DecodesInto(buf *bytes.Buffer) int {
blen := buf.Len()
declen := blen * 8 / 7
return declen

16
encoding/gsm7_test.go
View File

@@ -70,7 +70,7 @@ func TestGSM7EncodeComplex8nASCIIString(t *testing.T) {
func TestGSM7EncodeDoesNotAllocateMoreThanNecessary(t *testing.T) {
coder := &GSM7Coder{}
input := "Ducks are fucking great, they quacks, O quackers, what the fuck."
buf := bytes.NewBuffer(make([]byte, GSM7EncodesInto(&input)))
buf := bytes.NewBuffer(make([]byte, coder.EncodesInto(&input)))
buf.Reset()
expected := buf.Cap()
@@ -271,7 +271,7 @@ func TestDeletesLastValue(t *testing.T) {
func TestGSM7EncodesIntoSmallString(t *testing.T) {
input := short8nString
expected := 7
actual := GSM7EncodesInto(&input)
actual := GSM7Coder{}.EncodesInto(&input)
if actual != expected {
t.Errorf("Expected %d, but got %d", expected, actual)
}
@@ -280,7 +280,7 @@ func TestGSM7EncodesIntoSmallString(t *testing.T) {
func TestGSM7EncodesIntoLargerNot8nString(t *testing.T) {
input := longNot8nString
expected := 33
actual := GSM7EncodesInto(&input)
actual := GSM7Coder{}.EncodesInto(&input)
if actual != expected {
t.Errorf("Expected %d, but got %d", expected, actual)
}
@@ -289,7 +289,7 @@ func TestGSM7EncodesIntoLargerNot8nString(t *testing.T) {
func TestGSM7EncodesIntoLarger8nString(t *testing.T) {
input := long8nString
expected := 56
actual := GSM7EncodesInto(&input)
actual := GSM7Coder{}.EncodesInto(&input)
if actual != expected {
t.Errorf("Expected %d, but got %d", expected, actual)
}
@@ -298,7 +298,7 @@ func TestGSM7EncodesIntoLarger8nString(t *testing.T) {
func TestGSM7DecodesIntoSmallString(t *testing.T) {
input := short8nStringEncodedBytes
expected := 8
actual := GSM7DecodesInto(bytes.NewBuffer(input))
actual := GSM7Coder{}.DecodesInto(bytes.NewBuffer(input))
if actual != expected {
t.Errorf("Expected %d, but got %d", expected, actual)
}
@@ -307,7 +307,7 @@ func TestGSM7DecodesIntoSmallString(t *testing.T) {
func TestGSM7DecodesIntoLargerNot8nString(t *testing.T) {
input := longNot8nStringEncodedBytes
expected := 37
actual := GSM7DecodesInto(bytes.NewBuffer(input))
actual := GSM7Coder{}.DecodesInto(bytes.NewBuffer(input))
if actual != expected {
t.Errorf("Expected %d, but got %d", expected, actual)
}
@@ -316,7 +316,7 @@ func TestGSM7DecodesIntoLargerNot8nString(t *testing.T) {
func TestGSM7DecodesIntoLarger8nString(t *testing.T) {
input := long8nStringEncodedBytes
expected := 64
actual := GSM7DecodesInto(bytes.NewBuffer(input))
actual := GSM7Coder{}.DecodesInto(bytes.NewBuffer(input))
if actual != expected {
t.Errorf("Expected %d, but got %d", expected, actual)
}
@@ -362,7 +362,7 @@ func BenchmarkGSM7EncodeComplex8nASCIIStringPrealloc(b *testing.B) {
b.ResetTimer()
for i := 0; i < b.N; i++ {
buf := bytes.NewBuffer(make([]byte, GSM7EncodesInto(&input)))
buf := bytes.NewBuffer(make([]byte, coder.EncodesInto(&input)))
buf.Reset()
coder.Encode(&input, buf)
}