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gob: several fixes.

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1) Be sure to use the eval-time encoder/decoder rather than
the compile-time decoder.  In a few cases the receiver for
the compiling encoder was being pickled incorrectly into a
closure.
(This is the fix for issue 1238).

2) Get the innermost name right when given a pointer to an
unnamed type.

3) Use a count to delineate interface values, making it
possible to ignore values without having a concrete type
to encode into.  This is a protocol change but only for the
new feature, so it shouldn't affect anyone.  The old test
worked because, amazingly, it depended on bug #1.

Fixes #1238.

R=rsc, albert.strasheim
CC=golang-dev
https://golang.org/cl/2806041
This commit is contained in:
Rob Pike 2010-10-31 13:41:30 -07:00
parent f62772b1e5
commit 7f7cb166c8
7 changed files with 104 additions and 77 deletions
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28
src/pkg/gob/codec_test.go
View file

@ -50,7 +50,7 @@ func testError(t *testing.T) {
func TestUintCodec(t *testing.T) {
defer testError(t)
b := new(bytes.Buffer)
encState := newEncoderState(b)
encState := newEncoderState(nil, b)
for _, tt := range encodeT {
b.Reset()
encodeUint(encState, tt.x)
@ -58,7 +58,7 @@ func TestUintCodec(t *testing.T) {
t.Errorf("encodeUint: %#x encode: expected % x got % x", tt.x, tt.b, b.Bytes())
}
}
decState := newDecodeState(&b)
decState := newDecodeState(nil, &b)
for u := uint64(0); ; u = (u + 1) * 7 {
b.Reset()
encodeUint(encState, u)
@ -75,9 +75,9 @@ func TestUintCodec(t *testing.T) {
func verifyInt(i int64, t *testing.T) {
defer testError(t)
var b = new(bytes.Buffer)
encState := newEncoderState(b)
encState := newEncoderState(nil, b)
encodeInt(encState, i)
decState := newDecodeState(&b)
decState := newDecodeState(nil, &b)
decState.buf = make([]byte, 8)
j := decodeInt(decState)
if i != j {
@ -113,7 +113,7 @@ var bytesResult = []byte{0x07, 0x05, 'h', 'e', 'l', 'l', 'o'}
func newencoderState(b *bytes.Buffer) *encoderState {
b.Reset()
state := newEncoderState(b)
state := newEncoderState(nil, b)
state.fieldnum = -1
return state
}
@ -327,7 +327,7 @@ func execDec(typ string, instr *decInstr, state *decodeState, t *testing.T, p un
func newDecodeStateFromData(data []byte) *decodeState {
b := bytes.NewBuffer(data)
state := newDecodeState(&b)
state := newDecodeState(nil, &b)
state.fieldnum = -1
return state
}
@ -1125,6 +1125,14 @@ func (v Vector) Square() int {
return sum
}
type Point struct {
a, b int
}
func (p Point) Square() int {
return p.a*p.a + p.b*p.b
}
// A struct with interfaces in it.
type InterfaceItem struct {
i int
@ -1243,15 +1251,15 @@ func TestInterfaceBasic(t *testing.T) {
func TestIgnoreInterface(t *testing.T) {
iVal := Int(3)
fVal := Float(5)
// Sending a Vector will require that the receiver define a type in the middle of
// Sending a Point will require that the receiver define a type in the middle of
// receiving the value for item2.
vVal := Vector{1, 2, 3}
pVal := Point{2, 3}
b := new(bytes.Buffer)
item1 := &InterfaceItem{1, iVal, fVal, vVal, 11.5, nil}
item1 := &InterfaceItem{1, iVal, fVal, pVal, 11.5, nil}
// Register the types.
Register(Int(0))
Register(Float(0))
Register(Vector{})
Register(Point{})
err := NewEncoder(b).Encode(item1)
if err != nil {
t.Error("expected no encode error; got", err)