mirror of
https://github.com/golang/go
synced 2024-11-12 05:50:21 -07:00
gob: allow transmission of things other than structs at the top level.
also fix a bug handling nil maps: before, would needlessly send empty map R=rsc CC=golang-dev https://golang.org/cl/1739043
This commit is contained in:
parent
e0334ab798
commit
a26ab29ab8
@ -1039,7 +1039,7 @@ func TestInvalidField(t *testing.T) {
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type Indirect struct {
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a ***[3]int
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s ***[]int
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m ***map[string]int
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m ****map[string]int
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}
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type Direct struct {
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@ -1059,10 +1059,11 @@ func TestIndirectSliceMapArray(t *testing.T) {
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*i.s = new(*[]int)
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**i.s = new([]int)
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***i.s = []int{4, 5, 6}
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i.m = new(**map[string]int)
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*i.m = new(*map[string]int)
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**i.m = new(map[string]int)
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***i.m = map[string]int{"one": 1, "two": 2, "three": 3}
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i.m = new(***map[string]int)
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*i.m = new(**map[string]int)
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**i.m = new(*map[string]int)
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***i.m = new(map[string]int)
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****i.m = map[string]int{"one": 1, "two": 2, "three": 3}
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b := new(bytes.Buffer)
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NewEncoder(b).Encode(i)
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dec := NewDecoder(b)
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@ -1093,12 +1094,12 @@ func TestIndirectSliceMapArray(t *testing.T) {
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t.Error("error: ", err)
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}
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if len(***i.a) != 3 || (***i.a)[0] != 11 || (***i.a)[1] != 22 || (***i.a)[2] != 33 {
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t.Errorf("indirect to direct: ***i.a is %v not %v", ***i.a, d.a)
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t.Errorf("direct to indirect: ***i.a is %v not %v", ***i.a, d.a)
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}
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if len(***i.s) != 3 || (***i.s)[0] != 44 || (***i.s)[1] != 55 || (***i.s)[2] != 66 {
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t.Errorf("indirect to direct: ***i.s is %v not %v", ***i.s, ***i.s)
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t.Errorf("direct to indirect: ***i.s is %v not %v", ***i.s, ***i.s)
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}
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if len(***i.m) != 3 || (***i.m)["four"] != 4 || (***i.m)["five"] != 5 || (***i.m)["six"] != 6 {
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t.Errorf("indirect to direct: ***i.m is %v not %v", ***i.m, d.m)
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if len(****i.m) != 3 || (****i.m)["four"] != 4 || (****i.m)["five"] != 5 || (****i.m)["six"] != 6 {
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t.Errorf("direct to indirect: ****i.m is %v not %v", ****i.m, d.m)
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}
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}
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@ -13,15 +13,13 @@ import (
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"math"
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"os"
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"reflect"
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"runtime"
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"unsafe"
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)
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var (
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errBadUint = os.ErrorString("gob: encoded unsigned integer out of range")
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errBadType = os.ErrorString("gob: unknown type id or corrupted data")
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errRange = os.ErrorString("gob: internal error: field numbers out of bounds")
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errNotStruct = os.ErrorString("gob: TODO: can only handle structs")
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errBadUint = os.ErrorString("gob: encoded unsigned integer out of range")
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errBadType = os.ErrorString("gob: unknown type id or corrupted data")
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errRange = os.ErrorString("gob: internal error: field numbers out of bounds")
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)
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// The global execution state of an instance of the decoder.
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@ -389,18 +387,44 @@ type decEngine struct {
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numInstr int // the number of active instructions
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}
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func decodeStruct(engine *decEngine, rtyp *reflect.StructType, b *bytes.Buffer, p uintptr, indir int) os.Error {
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if indir > 0 {
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up := unsafe.Pointer(p)
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if indir > 1 {
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up = decIndirect(up, indir)
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}
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if *(*unsafe.Pointer)(up) == nil {
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// Allocate object.
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*(*unsafe.Pointer)(up) = unsafe.New((*runtime.StructType)(unsafe.Pointer(rtyp)))
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}
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p = *(*uintptr)(up)
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// allocate makes sure storage is available for an object of underlying type rtyp
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// that is indir levels of indirection through p.
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func allocate(rtyp reflect.Type, p uintptr, indir int) uintptr {
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if indir == 0 {
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return p
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}
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up := unsafe.Pointer(p)
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if indir > 1 {
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up = decIndirect(up, indir)
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}
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if *(*unsafe.Pointer)(up) == nil {
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// Allocate object.
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*(*unsafe.Pointer)(up) = unsafe.New(rtyp)
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}
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return *(*uintptr)(up)
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}
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func decodeSingle(engine *decEngine, rtyp reflect.Type, b *bytes.Buffer, p uintptr, indir int) os.Error {
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p = allocate(rtyp, p, indir)
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state := newDecodeState(b)
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state.fieldnum = singletonField
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basep := p
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delta := int(decodeUint(state))
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if delta != 0 {
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state.err = os.ErrorString("gob decode: corrupted data: non-zero delta for singleton")
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return state.err
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}
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instr := &engine.instr[singletonField]
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ptr := unsafe.Pointer(basep) // offset will be zero
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if instr.indir > 1 {
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ptr = decIndirect(ptr, instr.indir)
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}
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instr.op(instr, state, ptr)
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return state.err
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}
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func decodeStruct(engine *decEngine, rtyp *reflect.StructType, b *bytes.Buffer, p uintptr, indir int) os.Error {
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p = allocate(rtyp, p, indir)
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state := newDecodeState(b)
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state.fieldnum = -1
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basep := p
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@ -468,12 +492,7 @@ func decodeArrayHelper(state *decodeState, p uintptr, elemOp decOp, elemWid uint
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func decodeArray(atyp *reflect.ArrayType, state *decodeState, p uintptr, elemOp decOp, elemWid uintptr, length, indir, elemIndir int, ovfl os.ErrorString) os.Error {
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if indir > 0 {
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up := unsafe.Pointer(p)
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if *(*unsafe.Pointer)(up) == nil {
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// Allocate object.
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*(*unsafe.Pointer)(up) = unsafe.New(atyp)
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}
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p = *(*uintptr)(up)
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p = allocate(atyp, p, 1) // All but the last level has been allocated by dec.Indirect
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}
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if n := decodeUint(state); n != uint64(length) {
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return os.ErrorString("gob: length mismatch in decodeArray")
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@ -493,12 +512,7 @@ func decodeIntoValue(state *decodeState, op decOp, indir int, v reflect.Value, o
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func decodeMap(mtyp *reflect.MapType, state *decodeState, p uintptr, keyOp, elemOp decOp, indir, keyIndir, elemIndir int, ovfl os.ErrorString) os.Error {
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if indir > 0 {
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up := unsafe.Pointer(p)
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if *(*unsafe.Pointer)(up) == nil {
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// Allocate object.
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*(*unsafe.Pointer)(up) = unsafe.New(mtyp)
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}
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p = *(*uintptr)(up)
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p = allocate(mtyp, p, 1) // All but the last level has been allocated by dec.Indirect
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}
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up := unsafe.Pointer(p)
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if *(*unsafe.Pointer)(up) == nil { // maps are represented as a pointer in the runtime
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@ -806,18 +820,34 @@ func (dec *Decoder) compatibleType(fr reflect.Type, fw typeId) bool {
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return true
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}
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func (dec *Decoder) compileSingle(remoteId typeId, rt reflect.Type) (engine *decEngine, err os.Error) {
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engine = new(decEngine)
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engine.instr = make([]decInstr, 1) // one item
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name := rt.String() // best we can do
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if !dec.compatibleType(rt, remoteId) {
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return nil, os.ErrorString("gob: wrong type received for local value " + name)
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}
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op, indir, err := dec.decOpFor(remoteId, rt, name)
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if err != nil {
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return nil, err
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}
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ovfl := os.ErrorString(`value for "` + name + `" out of range`)
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engine.instr[singletonField] = decInstr{op, singletonField, indir, 0, ovfl}
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engine.numInstr = 1
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return
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}
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func (dec *Decoder) compileDec(remoteId typeId, rt reflect.Type) (engine *decEngine, err os.Error) {
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srt, ok1 := rt.(*reflect.StructType)
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srt, ok := rt.(*reflect.StructType)
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if !ok {
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return dec.compileSingle(remoteId, rt)
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}
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var wireStruct *structType
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// Builtin types can come from global pool; the rest must be defined by the decoder
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if t, ok := builtinIdToType[remoteId]; ok {
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wireStruct = t.(*structType)
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} else {
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w, ok2 := dec.wireType[remoteId]
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if !ok1 || !ok2 {
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return nil, errNotStruct
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}
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wireStruct = w.structT
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wireStruct = dec.wireType[remoteId].structT
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}
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engine = new(decEngine)
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engine.instr = make([]decInstr, len(wireStruct.field))
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@ -891,20 +921,19 @@ func (dec *Decoder) getIgnoreEnginePtr(wireId typeId) (enginePtr **decEngine, er
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func (dec *Decoder) decode(wireId typeId, e interface{}) os.Error {
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// Dereference down to the underlying struct type.
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rt, indir := indirect(reflect.Typeof(e))
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st, ok := rt.(*reflect.StructType)
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if !ok {
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return os.ErrorString("gob: decode can't handle " + rt.String())
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}
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enginePtr, err := dec.getDecEnginePtr(wireId, rt)
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if err != nil {
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return err
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}
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engine := *enginePtr
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if engine.numInstr == 0 && st.NumField() > 0 && len(dec.wireType[wireId].structT.field) > 0 {
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name := rt.Name()
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return os.ErrorString("gob: type mismatch: no fields matched compiling decoder for " + name)
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if st, ok := rt.(*reflect.StructType); ok {
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if engine.numInstr == 0 && st.NumField() > 0 && len(dec.wireType[wireId].structT.field) > 0 {
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name := rt.Name()
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return os.ErrorString("gob: type mismatch: no fields matched compiling decoder for " + name)
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}
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return decodeStruct(engine, st, dec.state.b, uintptr(reflect.NewValue(e).Addr()), indir)
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}
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return decodeStruct(engine, st, dec.state.b, uintptr(reflect.NewValue(e).Addr()), indir)
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return decodeSingle(engine, rt, dec.state.b, uintptr(reflect.NewValue(e).Addr()), indir)
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}
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func init() {
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@ -108,8 +108,9 @@ func (dec *Decoder) Decode(e interface{}) os.Error {
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}
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// No, it's a value.
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// Make sure the type has been defined already.
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if dec.wireType[id] == nil {
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// Make sure the type has been defined already or is a builtin type (for
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// top-level singleton values).
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if dec.wireType[id] == nil && builtinIdToType[id] == nil {
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dec.state.err = errBadType
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break
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}
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@ -271,7 +271,7 @@ const uint64Size = unsafe.Sizeof(uint64(0))
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type encoderState struct {
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b *bytes.Buffer
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err os.Error // error encountered during encoding.
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inArray bool // encoding an array element or map key/value pair
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sendZero bool // encoding an array element or map key/value pair; send zero values
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fieldnum int // the last field number written.
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buf [1 + uint64Size]byte // buffer used by the encoder; here to avoid allocation.
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}
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@ -352,7 +352,7 @@ func encIndirect(p unsafe.Pointer, indir int) unsafe.Pointer {
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func encBool(i *encInstr, state *encoderState, p unsafe.Pointer) {
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b := *(*bool)(p)
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if b || state.inArray {
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if b || state.sendZero {
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state.update(i)
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if b {
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encodeUint(state, 1)
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@ -364,7 +364,7 @@ func encBool(i *encInstr, state *encoderState, p unsafe.Pointer) {
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func encInt(i *encInstr, state *encoderState, p unsafe.Pointer) {
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v := int64(*(*int)(p))
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if v != 0 || state.inArray {
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if v != 0 || state.sendZero {
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state.update(i)
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encodeInt(state, v)
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}
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@ -372,7 +372,7 @@ func encInt(i *encInstr, state *encoderState, p unsafe.Pointer) {
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func encUint(i *encInstr, state *encoderState, p unsafe.Pointer) {
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v := uint64(*(*uint)(p))
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if v != 0 || state.inArray {
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if v != 0 || state.sendZero {
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state.update(i)
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encodeUint(state, v)
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}
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@ -380,7 +380,7 @@ func encUint(i *encInstr, state *encoderState, p unsafe.Pointer) {
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func encInt8(i *encInstr, state *encoderState, p unsafe.Pointer) {
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v := int64(*(*int8)(p))
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if v != 0 || state.inArray {
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if v != 0 || state.sendZero {
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state.update(i)
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encodeInt(state, v)
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}
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@ -388,7 +388,7 @@ func encInt8(i *encInstr, state *encoderState, p unsafe.Pointer) {
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func encUint8(i *encInstr, state *encoderState, p unsafe.Pointer) {
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v := uint64(*(*uint8)(p))
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if v != 0 || state.inArray {
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if v != 0 || state.sendZero {
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state.update(i)
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encodeUint(state, v)
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}
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@ -396,7 +396,7 @@ func encUint8(i *encInstr, state *encoderState, p unsafe.Pointer) {
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func encInt16(i *encInstr, state *encoderState, p unsafe.Pointer) {
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v := int64(*(*int16)(p))
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if v != 0 || state.inArray {
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if v != 0 || state.sendZero {
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state.update(i)
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encodeInt(state, v)
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}
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@ -404,7 +404,7 @@ func encInt16(i *encInstr, state *encoderState, p unsafe.Pointer) {
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func encUint16(i *encInstr, state *encoderState, p unsafe.Pointer) {
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v := uint64(*(*uint16)(p))
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if v != 0 || state.inArray {
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if v != 0 || state.sendZero {
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state.update(i)
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encodeUint(state, v)
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}
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@ -412,7 +412,7 @@ func encUint16(i *encInstr, state *encoderState, p unsafe.Pointer) {
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func encInt32(i *encInstr, state *encoderState, p unsafe.Pointer) {
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v := int64(*(*int32)(p))
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if v != 0 || state.inArray {
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if v != 0 || state.sendZero {
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state.update(i)
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encodeInt(state, v)
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}
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@ -420,7 +420,7 @@ func encInt32(i *encInstr, state *encoderState, p unsafe.Pointer) {
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func encUint32(i *encInstr, state *encoderState, p unsafe.Pointer) {
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v := uint64(*(*uint32)(p))
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if v != 0 || state.inArray {
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if v != 0 || state.sendZero {
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state.update(i)
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encodeUint(state, v)
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}
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@ -428,7 +428,7 @@ func encUint32(i *encInstr, state *encoderState, p unsafe.Pointer) {
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func encInt64(i *encInstr, state *encoderState, p unsafe.Pointer) {
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v := *(*int64)(p)
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if v != 0 || state.inArray {
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if v != 0 || state.sendZero {
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state.update(i)
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encodeInt(state, v)
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}
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@ -436,7 +436,7 @@ func encInt64(i *encInstr, state *encoderState, p unsafe.Pointer) {
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func encUint64(i *encInstr, state *encoderState, p unsafe.Pointer) {
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v := *(*uint64)(p)
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if v != 0 || state.inArray {
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if v != 0 || state.sendZero {
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state.update(i)
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encodeUint(state, v)
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}
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@ -444,7 +444,7 @@ func encUint64(i *encInstr, state *encoderState, p unsafe.Pointer) {
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func encUintptr(i *encInstr, state *encoderState, p unsafe.Pointer) {
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v := uint64(*(*uintptr)(p))
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if v != 0 || state.inArray {
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if v != 0 || state.sendZero {
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state.update(i)
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encodeUint(state, v)
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}
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@ -468,7 +468,7 @@ func floatBits(f float64) uint64 {
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func encFloat(i *encInstr, state *encoderState, p unsafe.Pointer) {
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f := *(*float)(p)
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if f != 0 || state.inArray {
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if f != 0 || state.sendZero {
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v := floatBits(float64(f))
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state.update(i)
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encodeUint(state, v)
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@ -477,7 +477,7 @@ func encFloat(i *encInstr, state *encoderState, p unsafe.Pointer) {
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func encFloat32(i *encInstr, state *encoderState, p unsafe.Pointer) {
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f := *(*float32)(p)
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if f != 0 || state.inArray {
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if f != 0 || state.sendZero {
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v := floatBits(float64(f))
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state.update(i)
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encodeUint(state, v)
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@ -486,7 +486,7 @@ func encFloat32(i *encInstr, state *encoderState, p unsafe.Pointer) {
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func encFloat64(i *encInstr, state *encoderState, p unsafe.Pointer) {
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f := *(*float64)(p)
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if f != 0 || state.inArray {
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if f != 0 || state.sendZero {
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state.update(i)
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v := floatBits(f)
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encodeUint(state, v)
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@ -496,7 +496,7 @@ func encFloat64(i *encInstr, state *encoderState, p unsafe.Pointer) {
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// Complex numbers are just a pair of floating-point numbers, real part first.
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func encComplex(i *encInstr, state *encoderState, p unsafe.Pointer) {
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c := *(*complex)(p)
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if c != 0+0i || state.inArray {
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if c != 0+0i || state.sendZero {
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rpart := floatBits(float64(real(c)))
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ipart := floatBits(float64(imag(c)))
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state.update(i)
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@ -507,7 +507,7 @@ func encComplex(i *encInstr, state *encoderState, p unsafe.Pointer) {
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func encComplex64(i *encInstr, state *encoderState, p unsafe.Pointer) {
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c := *(*complex64)(p)
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if c != 0+0i || state.inArray {
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if c != 0+0i || state.sendZero {
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rpart := floatBits(float64(real(c)))
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ipart := floatBits(float64(imag(c)))
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state.update(i)
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@ -518,7 +518,7 @@ func encComplex64(i *encInstr, state *encoderState, p unsafe.Pointer) {
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func encComplex128(i *encInstr, state *encoderState, p unsafe.Pointer) {
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c := *(*complex128)(p)
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if c != 0+0i || state.inArray {
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if c != 0+0i || state.sendZero {
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rpart := floatBits(real(c))
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ipart := floatBits(imag(c))
|
||||
state.update(i)
|
||||
@ -530,7 +530,7 @@ func encComplex128(i *encInstr, state *encoderState, p unsafe.Pointer) {
|
||||
// Byte arrays are encoded as an unsigned count followed by the raw bytes.
|
||||
func encUint8Array(i *encInstr, state *encoderState, p unsafe.Pointer) {
|
||||
b := *(*[]byte)(p)
|
||||
if len(b) > 0 || state.inArray {
|
||||
if len(b) > 0 || state.sendZero {
|
||||
state.update(i)
|
||||
encodeUint(state, uint64(len(b)))
|
||||
state.b.Write(b)
|
||||
@ -540,7 +540,7 @@ func encUint8Array(i *encInstr, state *encoderState, p unsafe.Pointer) {
|
||||
// Strings are encoded as an unsigned count followed by the raw bytes.
|
||||
func encString(i *encInstr, state *encoderState, p unsafe.Pointer) {
|
||||
s := *(*string)(p)
|
||||
if len(s) > 0 || state.inArray {
|
||||
if len(s) > 0 || state.sendZero {
|
||||
state.update(i)
|
||||
encodeUint(state, uint64(len(s)))
|
||||
io.WriteString(state.b, s)
|
||||
@ -560,6 +560,26 @@ type encEngine struct {
|
||||
instr []encInstr
|
||||
}
|
||||
|
||||
const singletonField = 0
|
||||
|
||||
func encodeSingle(engine *encEngine, b *bytes.Buffer, basep uintptr) os.Error {
|
||||
state := new(encoderState)
|
||||
state.b = b
|
||||
state.fieldnum = singletonField
|
||||
// There is no surrounding struct to frame the transmission, so we must
|
||||
// generate data even if the item is zero. To do this, set sendZero.
|
||||
state.sendZero = true
|
||||
instr := &engine.instr[singletonField]
|
||||
p := unsafe.Pointer(basep) // offset will be zero
|
||||
if instr.indir > 0 {
|
||||
if p = encIndirect(p, instr.indir); p == nil {
|
||||
return nil
|
||||
}
|
||||
}
|
||||
instr.op(instr, state, p)
|
||||
return state.err
|
||||
}
|
||||
|
||||
func encodeStruct(engine *encEngine, b *bytes.Buffer, basep uintptr) os.Error {
|
||||
state := new(encoderState)
|
||||
state.b = b
|
||||
@ -584,7 +604,7 @@ func encodeArray(b *bytes.Buffer, p uintptr, op encOp, elemWid uintptr, elemIndi
|
||||
state := new(encoderState)
|
||||
state.b = b
|
||||
state.fieldnum = -1
|
||||
state.inArray = true
|
||||
state.sendZero = true
|
||||
encodeUint(state, uint64(length))
|
||||
for i := 0; i < length && state.err == nil; i++ {
|
||||
elemp := p
|
||||
@ -607,22 +627,17 @@ func encodeReflectValue(state *encoderState, v reflect.Value, op encOp, indir in
|
||||
v = reflect.Indirect(v)
|
||||
}
|
||||
if v == nil {
|
||||
state.err = os.ErrorString("gob: encodeMap: nil element")
|
||||
state.err = os.ErrorString("gob: encodeReflectValue: nil element")
|
||||
return
|
||||
}
|
||||
op(nil, state, unsafe.Pointer(v.Addr()))
|
||||
}
|
||||
|
||||
func encodeMap(b *bytes.Buffer, rt reflect.Type, p uintptr, keyOp, elemOp encOp, keyIndir, elemIndir int) os.Error {
|
||||
func encodeMap(b *bytes.Buffer, mv *reflect.MapValue, keyOp, elemOp encOp, keyIndir, elemIndir int) os.Error {
|
||||
state := new(encoderState)
|
||||
state.b = b
|
||||
state.fieldnum = -1
|
||||
state.inArray = true
|
||||
// Maps cannot be accessed by moving addresses around the way
|
||||
// that slices etc. can. We must recover a full reflection value for
|
||||
// the iteration.
|
||||
v := reflect.NewValue(unsafe.Unreflect(rt, unsafe.Pointer((p))))
|
||||
mv := reflect.Indirect(v).(*reflect.MapValue)
|
||||
state.sendZero = true
|
||||
keys := mv.Keys()
|
||||
encodeUint(state, uint64(len(keys)))
|
||||
for _, key := range keys {
|
||||
@ -694,6 +709,10 @@ func encOpFor(rt reflect.Type) (encOp, int, os.Error) {
|
||||
return nil, 0, err
|
||||
}
|
||||
op = func(i *encInstr, state *encoderState, p unsafe.Pointer) {
|
||||
slice := (*reflect.SliceHeader)(p)
|
||||
if slice.Len == 0 {
|
||||
return
|
||||
}
|
||||
state.update(i)
|
||||
state.err = encodeArray(state.b, uintptr(p), elemOp, t.Elem().Size(), indir, t.Len())
|
||||
}
|
||||
@ -707,8 +726,16 @@ func encOpFor(rt reflect.Type) (encOp, int, os.Error) {
|
||||
return nil, 0, err
|
||||
}
|
||||
op = func(i *encInstr, state *encoderState, p unsafe.Pointer) {
|
||||
// Maps cannot be accessed by moving addresses around the way
|
||||
// that slices etc. can. We must recover a full reflection value for
|
||||
// the iteration.
|
||||
v := reflect.NewValue(unsafe.Unreflect(t, unsafe.Pointer((p))))
|
||||
mv := reflect.Indirect(v).(*reflect.MapValue)
|
||||
if mv.Len() == 0 {
|
||||
return
|
||||
}
|
||||
state.update(i)
|
||||
state.err = encodeMap(state.b, typ, uintptr(p), keyOp, elemOp, keyIndir, elemIndir)
|
||||
state.err = encodeMap(state.b, mv, keyOp, elemOp, keyIndir, elemIndir)
|
||||
}
|
||||
case *reflect.StructType:
|
||||
// Generate a closure that calls out to the engine for the nested type.
|
||||
@ -732,21 +759,27 @@ func encOpFor(rt reflect.Type) (encOp, int, os.Error) {
|
||||
|
||||
// The local Type was compiled from the actual value, so we know it's compatible.
|
||||
func compileEnc(rt reflect.Type) (*encEngine, os.Error) {
|
||||
srt, ok := rt.(*reflect.StructType)
|
||||
if !ok {
|
||||
panic("can't happen: non-struct")
|
||||
}
|
||||
srt, isStruct := rt.(*reflect.StructType)
|
||||
engine := new(encEngine)
|
||||
engine.instr = make([]encInstr, srt.NumField()+1) // +1 for terminator
|
||||
for fieldnum := 0; fieldnum < srt.NumField(); fieldnum++ {
|
||||
f := srt.Field(fieldnum)
|
||||
op, indir, err := encOpFor(f.Type)
|
||||
if isStruct {
|
||||
engine.instr = make([]encInstr, srt.NumField()+1) // +1 for terminator
|
||||
for fieldnum := 0; fieldnum < srt.NumField(); fieldnum++ {
|
||||
f := srt.Field(fieldnum)
|
||||
op, indir, err := encOpFor(f.Type)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
engine.instr[fieldnum] = encInstr{op, fieldnum, indir, uintptr(f.Offset)}
|
||||
}
|
||||
engine.instr[srt.NumField()] = encInstr{encStructTerminator, 0, 0, 0}
|
||||
} else {
|
||||
engine.instr = make([]encInstr, 1)
|
||||
op, indir, err := encOpFor(rt)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
engine.instr[fieldnum] = encInstr{op, fieldnum, indir, uintptr(f.Offset)}
|
||||
engine.instr[0] = encInstr{op, singletonField, indir, 0} // offset is zero
|
||||
}
|
||||
engine.instr[srt.NumField()] = encInstr{encStructTerminator, 0, 0, 0}
|
||||
return engine, nil
|
||||
}
|
||||
|
||||
@ -772,14 +805,14 @@ func encode(b *bytes.Buffer, e interface{}) os.Error {
|
||||
for i := 0; i < indir; i++ {
|
||||
v = reflect.Indirect(v)
|
||||
}
|
||||
if _, ok := v.(*reflect.StructValue); !ok {
|
||||
return os.ErrorString("gob: encode can't handle " + v.Type().String())
|
||||
}
|
||||
typeLock.Lock()
|
||||
engine, err := getEncEngine(rt)
|
||||
typeLock.Unlock()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
return encodeStruct(engine, b, v.Addr())
|
||||
if _, ok := v.(*reflect.StructValue); ok {
|
||||
return encodeStruct(engine, b, v.Addr())
|
||||
}
|
||||
return encodeSingle(engine, b, v.Addr())
|
||||
}
|
||||
|
@ -68,7 +68,7 @@ func (enc *Encoder) send() {
|
||||
}
|
||||
}
|
||||
|
||||
func (enc *Encoder) sendType(origt reflect.Type) {
|
||||
func (enc *Encoder) sendType(origt reflect.Type) (sent bool) {
|
||||
// Drill down to the base type.
|
||||
rt, _ := indirect(origt)
|
||||
|
||||
@ -147,11 +147,6 @@ func (enc *Encoder) Encode(e interface{}) os.Error {
|
||||
|
||||
enc.state.err = nil
|
||||
rt, _ := indirect(reflect.Typeof(e))
|
||||
// Must be a struct
|
||||
if _, ok := rt.(*reflect.StructType); !ok {
|
||||
enc.badType(rt)
|
||||
return enc.state.err
|
||||
}
|
||||
|
||||
// Sanity check only: encoder should never come in with data present.
|
||||
if enc.state.b.Len() > 0 || enc.countState.b.Len() > 0 {
|
||||
@ -163,10 +158,23 @@ func (enc *Encoder) Encode(e interface{}) os.Error {
|
||||
// First, have we already sent this type?
|
||||
if _, alreadySent := enc.sent[rt]; !alreadySent {
|
||||
// No, so send it.
|
||||
enc.sendType(rt)
|
||||
sent := enc.sendType(rt)
|
||||
if enc.state.err != nil {
|
||||
return enc.state.err
|
||||
}
|
||||
// If the type info has still not been transmitted, it means we have
|
||||
// a singleton basic type (int, []byte etc.) at top level. We don't
|
||||
// need to send the type info but we do need to update enc.sent.
|
||||
if !sent {
|
||||
typeLock.Lock()
|
||||
info, err := getTypeInfo(rt)
|
||||
typeLock.Unlock()
|
||||
if err != nil {
|
||||
enc.setError(err)
|
||||
return err
|
||||
}
|
||||
enc.sent[rt] = info.id
|
||||
}
|
||||
}
|
||||
|
||||
// Identify the type of this top-level value.
|
||||
|
@ -131,17 +131,10 @@ func TestBadData(t *testing.T) {
|
||||
corruptDataCheck("\x03now is the time for all good men", errBadType, t)
|
||||
}
|
||||
|
||||
// Types not supported by the Encoder (only structs work at the top level).
|
||||
// Basic types work implicitly.
|
||||
// Types not supported by the Encoder.
|
||||
var unsupportedValues = []interface{}{
|
||||
3,
|
||||
"hi",
|
||||
7.2,
|
||||
[]int{1, 2, 3},
|
||||
[3]int{1, 2, 3},
|
||||
make(chan int),
|
||||
func(a int) bool { return true },
|
||||
make(map[string]int),
|
||||
new(interface{}),
|
||||
}
|
||||
|
||||
@ -275,3 +268,59 @@ func TestDefaultsInArray(t *testing.T) {
|
||||
t.Error(err)
|
||||
}
|
||||
}
|
||||
|
||||
var testInt int
|
||||
var testFloat32 float32
|
||||
var testString string
|
||||
var testSlice []string
|
||||
var testMap map[string]int
|
||||
|
||||
type SingleTest struct {
|
||||
in interface{}
|
||||
out interface{}
|
||||
err string
|
||||
}
|
||||
|
||||
var singleTests = []SingleTest{
|
||||
SingleTest{17, &testInt, ""},
|
||||
SingleTest{float32(17.5), &testFloat32, ""},
|
||||
SingleTest{"bike shed", &testString, ""},
|
||||
SingleTest{[]string{"bike", "shed", "paint", "color"}, &testSlice, ""},
|
||||
SingleTest{map[string]int{"seven": 7, "twelve": 12}, &testMap, ""},
|
||||
|
||||
// Decode errors
|
||||
SingleTest{172, &testFloat32, "wrong type"},
|
||||
}
|
||||
|
||||
func TestSingletons(t *testing.T) {
|
||||
b := new(bytes.Buffer)
|
||||
enc := NewEncoder(b)
|
||||
dec := NewDecoder(b)
|
||||
for _, test := range singleTests {
|
||||
b.Reset()
|
||||
err := enc.Encode(test.in)
|
||||
if err != nil {
|
||||
t.Errorf("error encoding %v: %s", test.in, err)
|
||||
continue
|
||||
}
|
||||
err = dec.Decode(test.out)
|
||||
switch {
|
||||
case err != nil && test.err == "":
|
||||
t.Errorf("error decoding %v: %s", test.in, err)
|
||||
continue
|
||||
case err == nil && test.err != "":
|
||||
t.Errorf("expected error decoding %v: %s", test.in, test.err)
|
||||
continue
|
||||
case err != nil && test.err != "":
|
||||
if strings.Index(err.String(), test.err) < 0 {
|
||||
t.Errorf("wrong error decoding %v: wanted %s, got %v", test.in, test.err, err)
|
||||
}
|
||||
continue
|
||||
}
|
||||
// Get rid of the pointer in the rhs
|
||||
val := reflect.NewValue(test.out).(*reflect.PtrValue).Elem().Interface()
|
||||
if !reflect.DeepEqual(test.in, val) {
|
||||
t.Errorf("decoding int: expected %v got %v", test.in, val)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user