Add coder/decoder size to coder
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@@ -13,3 +13,10 @@ func (c *ASCIICoder) Encode(s *string, buf *bytes.Buffer) error {
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func (c *ASCIICoder) Decode(buf *bytes.Buffer) (string, error) {
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return buf.String(), nil
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}
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func (c ASCIICoder) EncodesInto(s *string) int {
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return len(*s)
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}
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func (c ASCIICoder) DecodesInto(buf *bytes.Buffer) int {
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return buf.Len()
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}
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@@ -5,4 +5,6 @@ import "bytes"
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type Coder interface {
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Encode(s *string, buf *bytes.Buffer) error
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Decode(buf *bytes.Buffer) (string, error)
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EncodesInto(s *string) int
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DecodesInto(buf *bytes.Buffer) int
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}
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@@ -19,7 +19,7 @@ func (c *GSM7Coder) Encode(s *string, buf *bytes.Buffer) error {
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bitshift byte = 0
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leap, shift bool
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)
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encodedSize := GSM7EncodesInto(s)
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encodedSize := c.EncodesInto(s)
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cap := buf.Cap()
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if cap < encodedSize {
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buf.Grow(encodedSize - cap)
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@@ -77,7 +77,7 @@ func (c *GSM7Coder) Decode(buf *bytes.Buffer) (string, error) {
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bitshift byte = 0
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leap bool
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)
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outLength := GSM7DecodesInto(buf)
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outLength := c.DecodesInto(buf)
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lengthDiff := outLength - len(gsm7)
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gsm7 = append(gsm7, make([]byte, lengthDiff)...)
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start := len(gsm7) - 2
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@@ -121,7 +121,7 @@ func InsertAt(data *[]byte, index int, value byte) {
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(*data)[index] = value
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}
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func GSM7EncodesInto(s *string) int {
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func (c GSM7Coder) EncodesInto(s *string) int {
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slen := len(*s)
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enclen := slen * 7 / 8
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if slen%8 != 0 {
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@@ -129,7 +129,7 @@ func GSM7EncodesInto(s *string) int {
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}
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return enclen
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}
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func GSM7DecodesInto(buf *bytes.Buffer) int {
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func (c GSM7Coder) DecodesInto(buf *bytes.Buffer) int {
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blen := buf.Len()
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declen := blen * 8 / 7
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return declen
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@@ -70,7 +70,7 @@ func TestGSM7EncodeComplex8nASCIIString(t *testing.T) {
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func TestGSM7EncodeDoesNotAllocateMoreThanNecessary(t *testing.T) {
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coder := &GSM7Coder{}
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input := "Ducks are fucking great, they quacks, O quackers, what the fuck."
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buf := bytes.NewBuffer(make([]byte, GSM7EncodesInto(&input)))
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buf := bytes.NewBuffer(make([]byte, coder.EncodesInto(&input)))
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buf.Reset()
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expected := buf.Cap()
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@@ -271,7 +271,7 @@ func TestDeletesLastValue(t *testing.T) {
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func TestGSM7EncodesIntoSmallString(t *testing.T) {
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input := short8nString
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expected := 7
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actual := GSM7EncodesInto(&input)
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actual := GSM7Coder{}.EncodesInto(&input)
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if actual != expected {
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t.Errorf("Expected %d, but got %d", expected, actual)
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}
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@@ -280,7 +280,7 @@ func TestGSM7EncodesIntoSmallString(t *testing.T) {
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func TestGSM7EncodesIntoLargerNot8nString(t *testing.T) {
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input := longNot8nString
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expected := 33
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actual := GSM7EncodesInto(&input)
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actual := GSM7Coder{}.EncodesInto(&input)
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if actual != expected {
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t.Errorf("Expected %d, but got %d", expected, actual)
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}
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@@ -289,7 +289,7 @@ func TestGSM7EncodesIntoLargerNot8nString(t *testing.T) {
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func TestGSM7EncodesIntoLarger8nString(t *testing.T) {
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input := long8nString
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expected := 56
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actual := GSM7EncodesInto(&input)
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actual := GSM7Coder{}.EncodesInto(&input)
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if actual != expected {
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t.Errorf("Expected %d, but got %d", expected, actual)
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}
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@@ -298,7 +298,7 @@ func TestGSM7EncodesIntoLarger8nString(t *testing.T) {
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func TestGSM7DecodesIntoSmallString(t *testing.T) {
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input := short8nStringEncodedBytes
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expected := 8
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actual := GSM7DecodesInto(bytes.NewBuffer(input))
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actual := GSM7Coder{}.DecodesInto(bytes.NewBuffer(input))
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if actual != expected {
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t.Errorf("Expected %d, but got %d", expected, actual)
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}
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@@ -307,7 +307,7 @@ func TestGSM7DecodesIntoSmallString(t *testing.T) {
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func TestGSM7DecodesIntoLargerNot8nString(t *testing.T) {
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input := longNot8nStringEncodedBytes
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expected := 37
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actual := GSM7DecodesInto(bytes.NewBuffer(input))
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actual := GSM7Coder{}.DecodesInto(bytes.NewBuffer(input))
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if actual != expected {
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t.Errorf("Expected %d, but got %d", expected, actual)
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}
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@@ -316,7 +316,7 @@ func TestGSM7DecodesIntoLargerNot8nString(t *testing.T) {
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func TestGSM7DecodesIntoLarger8nString(t *testing.T) {
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input := long8nStringEncodedBytes
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expected := 64
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actual := GSM7DecodesInto(bytes.NewBuffer(input))
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actual := GSM7Coder{}.DecodesInto(bytes.NewBuffer(input))
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if actual != expected {
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t.Errorf("Expected %d, but got %d", expected, actual)
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}
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@@ -362,7 +362,7 @@ func BenchmarkGSM7EncodeComplex8nASCIIStringPrealloc(b *testing.B) {
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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buf := bytes.NewBuffer(make([]byte, GSM7EncodesInto(&input)))
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buf := bytes.NewBuffer(make([]byte, coder.EncodesInto(&input)))
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buf.Reset()
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coder.Encode(&input, buf)
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}
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