mirror of
https://github.com/golang/go
synced 2024-10-04 21:11:22 -06:00
ec23467e65
change Type to gobType. fix some bugs around recursive structures. lots of cleanup. add the first cut at a type encoder. R=rsc DELTA=400 (287 added, 11 deleted, 102 changed) OCL=31401 CL=31406
666 lines
16 KiB
Go
666 lines
16 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package gob
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import (
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"bytes";
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"gob";
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"os";
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"reflect";
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"strings";
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"testing";
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"unsafe";
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)
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// Guarantee encoding format by comparing some encodings to hand-written values
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type EncodeT struct {
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x uint64;
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b []byte;
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}
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var encodeT = []EncodeT {
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EncodeT{ 0x00, []byte{0x80} },
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EncodeT{ 0x0f, []byte{0x8f} },
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EncodeT{ 0xff, []byte{0x7f, 0x81} },
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EncodeT{ 0xffff, []byte{0x7f, 0x7f, 0x83} },
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EncodeT{ 0xffffff, []byte{0x7f, 0x7f, 0x7f, 0x87} },
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EncodeT{ 0xffffffff, []byte{0x7f, 0x7f, 0x7f, 0x7f, 0x8f} },
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EncodeT{ 0xffffffffff, []byte{0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x9f} },
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EncodeT{ 0xffffffffffff, []byte{0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0xbf} },
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EncodeT{ 0xffffffffffffff, []byte{0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0xff} },
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EncodeT{ 0xffffffffffffffff, []byte{0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x81} },
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EncodeT{ 0x1111, []byte{0x11, 0xa2} },
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EncodeT{ 0x1111111111111111, []byte{0x11, 0x22, 0x44, 0x08, 0x11, 0x22, 0x44, 0x08, 0x91} },
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EncodeT{ 0x8888888888888888, []byte{0x08, 0x11, 0x22, 0x44, 0x08, 0x11, 0x22, 0x44, 0x08, 0x81} },
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EncodeT{ 1<<63, []byte{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x81} },
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}
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// Test basic encode/decode routines for unsigned integers
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func TestUintCodec(t *testing.T) {
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b := new(bytes.Buffer);
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encState := new(EncState);
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encState.w = b;
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for i, tt := range encodeT {
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b.Reset();
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EncodeUint(encState, tt.x);
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if encState.err != nil {
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t.Error("EncodeUint:", tt.x, encState.err)
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}
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if !bytes.Equal(tt.b, b.Data()) {
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t.Errorf("EncodeUint: expected % x got % x", tt.b, b.Data())
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}
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}
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decState := new(DecState);
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decState.r = b;
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for u := uint64(0); ; u = (u+1) * 7 {
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b.Reset();
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EncodeUint(encState, u);
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if encState.err != nil {
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t.Error("EncodeUint:", u, encState.err)
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}
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v := DecodeUint(decState);
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if decState.err != nil {
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t.Error("DecodeUint:", u, decState.err)
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}
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if u != v {
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t.Errorf("Encode/Decode: sent %#x received %#x\n", u, v)
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}
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if u & (1<<63) != 0 {
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break
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}
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}
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}
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func verifyInt(i int64, t *testing.T) {
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var b = new(bytes.Buffer);
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encState := new(EncState);
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encState.w = b;
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EncodeInt(encState, i);
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if encState.err != nil {
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t.Error("EncodeInt:", i, encState.err)
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}
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decState := new(DecState);
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decState.r = b;
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j := DecodeInt(decState);
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if decState.err != nil {
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t.Error("DecodeInt:", i, decState.err)
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}
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if i != j {
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t.Errorf("Encode/Decode: sent %#x received %#x\n", uint64(i), uint64(j))
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}
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}
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// Test basic encode/decode routines for signed integers
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func TestIntCodec(t *testing.T) {
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var b = new(bytes.Buffer);
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for u := uint64(0); ; u = (u+1) * 7 {
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// Do positive and negative values
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i := int64(u);
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verifyInt(i, t);
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verifyInt(-i, t);
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verifyInt(^i, t);
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if u & (1<<63) != 0 {
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break
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}
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}
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verifyInt(-1<<63, t); // a tricky case
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}
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// The result of encoding a true boolean with field number 6
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var boolResult = []byte{0x87, 0x81}
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// The result of encoding a number 17 with field number 6
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var signedResult = []byte{0x87, 0xa2}
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var unsignedResult = []byte{0x87, 0x91}
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var floatResult = []byte{0x87, 0x40, 0xe2}
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// The result of encoding "hello" with field number 6
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var bytesResult = []byte{0x87, 0x85, 'h', 'e', 'l', 'l', 'o'}
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func newEncState(b *bytes.Buffer) *EncState {
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b.Reset();
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state := new(EncState);
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state.w = b;
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state.fieldnum = -1;
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return state;
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}
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// Test instruction execution for encoding.
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// Do not run the machine yet; instead do individual instructions crafted by hand.
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func TestScalarEncInstructions(t *testing.T) {
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var b = new(bytes.Buffer);
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// bool
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{
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data := struct { a bool } { true };
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instr := &encInstr{ encBool, 6, 0, 0 };
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state := newEncState(b);
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instr.op(instr, state, unsafe.Pointer(&data));
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if !bytes.Equal(boolResult, b.Data()) {
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t.Errorf("bool enc instructions: expected % x got % x", boolResult, b.Data())
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}
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}
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// int
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{
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b.Reset();
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data := struct { a int } { 17 };
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instr := &encInstr{ encInt, 6, 0, 0 };
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state := newEncState(b);
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instr.op(instr, state, unsafe.Pointer(&data));
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if !bytes.Equal(signedResult, b.Data()) {
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t.Errorf("int enc instructions: expected % x got % x", signedResult, b.Data())
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}
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}
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// uint
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{
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b.Reset();
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data := struct { a uint } { 17 };
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instr := &encInstr{ encUint, 6, 0, 0 };
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state := newEncState(b);
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instr.op(instr, state, unsafe.Pointer(&data));
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if !bytes.Equal(unsignedResult, b.Data()) {
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t.Errorf("uint enc instructions: expected % x got % x", unsignedResult, b.Data())
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}
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}
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// int8
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{
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b.Reset();
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data := struct { a int8 } { 17 };
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instr := &encInstr{ encInt, 6, 0, 0 };
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state := newEncState(b);
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instr.op(instr, state, unsafe.Pointer(&data));
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if !bytes.Equal(signedResult, b.Data()) {
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t.Errorf("int8 enc instructions: expected % x got % x", signedResult, b.Data())
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}
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}
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// uint8
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{
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b.Reset();
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data := struct { a uint8 } { 17 };
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instr := &encInstr{ encUint, 6, 0, 0 };
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state := newEncState(b);
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instr.op(instr, state, unsafe.Pointer(&data));
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if !bytes.Equal(unsignedResult, b.Data()) {
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t.Errorf("uint8 enc instructions: expected % x got % x", unsignedResult, b.Data())
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}
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}
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// int16
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{
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b.Reset();
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v := int16(17);
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pv := &v;
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ppv := &pv;
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data := struct { a int16 } { 17 };
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instr := &encInstr{ encInt16, 6, 0, 0 };
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state := newEncState(b);
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instr.op(instr, state, unsafe.Pointer(&data));
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if !bytes.Equal(signedResult, b.Data()) {
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t.Errorf("int16 enc instructions: expected % x got % x", signedResult, b.Data())
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}
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}
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// uint16
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{
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b.Reset();
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data := struct { a uint16 } { 17 };
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instr := &encInstr{ encUint16, 6, 0, 0 };
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state := newEncState(b);
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instr.op(instr, state, unsafe.Pointer(&data));
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if !bytes.Equal(unsignedResult, b.Data()) {
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t.Errorf("uint16 enc instructions: expected % x got % x", unsignedResult, b.Data())
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}
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}
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// int32
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{
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b.Reset();
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data := struct { a int32 } { 17 };
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instr := &encInstr{ encInt32, 6, 0, 0 };
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state := newEncState(b);
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instr.op(instr, state, unsafe.Pointer(&data));
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if !bytes.Equal(signedResult, b.Data()) {
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t.Errorf("int32 enc instructions: expected % x got % x", signedResult, b.Data())
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}
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}
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// uint32
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{
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b.Reset();
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data := struct { a uint32 } { 17 };
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instr := &encInstr{ encUint32, 6, 0, 0 };
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state := newEncState(b);
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instr.op(instr, state, unsafe.Pointer(&data));
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if !bytes.Equal(unsignedResult, b.Data()) {
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t.Errorf("uint32 enc instructions: expected % x got % x", unsignedResult, b.Data())
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}
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}
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// int64
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{
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b.Reset();
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data := struct { a int64 } { 17 };
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instr := &encInstr{ encInt64, 6, 0, 0 };
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state := newEncState(b);
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instr.op(instr, state, unsafe.Pointer(&data));
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if !bytes.Equal(signedResult, b.Data()) {
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t.Errorf("int64 enc instructions: expected % x got % x", signedResult, b.Data())
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}
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}
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// uint64
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{
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b.Reset();
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data := struct { a uint64 } { 17 };
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instr := &encInstr{ encUint, 6, 0, 0 };
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state := newEncState(b);
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instr.op(instr, state, unsafe.Pointer(&data));
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if !bytes.Equal(unsignedResult, b.Data()) {
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t.Errorf("uint64 enc instructions: expected % x got % x", unsignedResult, b.Data())
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}
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}
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// float
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{
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b.Reset();
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data := struct { a float } { 17 };
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instr := &encInstr{ encFloat, 6, 0, 0 };
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state := newEncState(b);
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instr.op(instr, state, unsafe.Pointer(&data));
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if !bytes.Equal(floatResult, b.Data()) {
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t.Errorf("float enc instructions: expected % x got % x", floatResult, b.Data())
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}
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}
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// float32
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{
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b.Reset();
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data := struct { a float32 } { 17 };
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instr := &encInstr{ encFloat32, 6, 0, 0 };
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state := newEncState(b);
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instr.op(instr, state, unsafe.Pointer(&data));
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if !bytes.Equal(floatResult, b.Data()) {
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t.Errorf("float32 enc instructions: expected % x got % x", floatResult, b.Data())
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}
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}
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// float64
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{
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b.Reset();
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data := struct { a float64 } { 17 };
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instr := &encInstr{ encFloat64, 6, 0, 0 };
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state := newEncState(b);
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instr.op(instr, state, unsafe.Pointer(&data));
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if !bytes.Equal(floatResult, b.Data()) {
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t.Errorf("float64 enc instructions: expected % x got % x", floatResult, b.Data())
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}
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}
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// bytes == []uint8
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{
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b.Reset();
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data := struct { a []byte } { strings.Bytes("hello") };
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instr := &encInstr{ encUint8Array, 6, 0, 0 };
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state := newEncState(b);
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instr.op(instr, state, unsafe.Pointer(&data));
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if !bytes.Equal(bytesResult, b.Data()) {
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t.Errorf("bytes enc instructions: expected % x got % x", bytesResult, b.Data())
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}
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}
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// string
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{
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b.Reset();
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data := struct { a string } { "hello" };
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instr := &encInstr{ encString, 6, 0, 0 };
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state := newEncState(b);
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instr.op(instr, state, unsafe.Pointer(&data));
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if !bytes.Equal(bytesResult, b.Data()) {
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t.Errorf("string enc instructions: expected % x got % x", bytesResult, b.Data())
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}
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}
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}
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func execDec(typ string, instr *decInstr, state *DecState, t *testing.T, p unsafe.Pointer) {
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v := int(DecodeUint(state));
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if state.err != nil {
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t.Fatalf("decoding %s field: %v", typ, state.err);
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}
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if v + state.fieldnum != 6 {
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t.Fatalf("decoding field number %d, got %d", 6, v + state.fieldnum);
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}
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instr.op(instr, state, decIndirect(p, instr.indir));
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state.fieldnum = 6;
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}
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func newDecState(data []byte) *DecState {
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state := new(DecState);
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state.r = bytes.NewBuffer(data);
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state.fieldnum = -1;
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return state;
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}
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// Test instruction execution for decoding.
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// Do not run the machine yet; instead do individual instructions crafted by hand.
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func TestScalarDecInstructions(t *testing.T) {
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// bool
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{
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var data struct { a bool };
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instr := &decInstr{ decBool, 6, 0, 0 };
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state := newDecState(boolResult);
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execDec("bool", instr, state, t, unsafe.Pointer(&data));
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if data.a != true {
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t.Errorf("int a = %v not true", data.a)
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}
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}
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// int
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{
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var data struct { a int };
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instr := &decInstr{ decInt, 6, 0, 0 };
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state := newDecState(signedResult);
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execDec("int", instr, state, t, unsafe.Pointer(&data));
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if data.a != 17 {
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t.Errorf("int a = %v not 17", data.a)
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}
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}
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// uint
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{
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var data struct { a uint };
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instr := &decInstr{ decUint, 6, 0, 0 };
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state := newDecState(unsignedResult);
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execDec("uint", instr, state, t, unsafe.Pointer(&data));
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if data.a != 17 {
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t.Errorf("int a = %v not 17", data.a)
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}
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}
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// int8
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{
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var data struct { a int8 };
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instr := &decInstr{ decInt8, 6, 0, 0 };
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state := newDecState(signedResult);
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execDec("int8", instr, state, t, unsafe.Pointer(&data));
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if data.a != 17 {
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t.Errorf("int a = %v not 17", data.a)
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}
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}
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// uint8
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{
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var data struct { a uint8 };
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instr := &decInstr{ decUint8, 6, 0, 0 };
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state := newDecState(unsignedResult);
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execDec("uint8", instr, state, t, unsafe.Pointer(&data));
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if data.a != 17 {
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t.Errorf("int a = %v not 17", data.a)
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}
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}
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// int16
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{
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var data struct { a int16 };
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instr := &decInstr{ decInt16, 6, 0, 0 };
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state := newDecState(signedResult);
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execDec("int16", instr, state, t, unsafe.Pointer(&data));
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if data.a != 17 {
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t.Errorf("int a = %v not 17", data.a)
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}
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}
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// uint16
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{
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var data struct { a uint16 };
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instr := &decInstr{ decUint16, 6, 0, 0 };
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state := newDecState(unsignedResult);
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execDec("uint16", instr, state, t, unsafe.Pointer(&data));
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if data.a != 17 {
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t.Errorf("int a = %v not 17", data.a)
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}
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}
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// int32
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{
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var data struct { a int32 };
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instr := &decInstr{ decInt32, 6, 0, 0 };
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state := newDecState(signedResult);
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execDec("int32", instr, state, t, unsafe.Pointer(&data));
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if data.a != 17 {
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t.Errorf("int a = %v not 17", data.a)
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}
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}
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// uint32
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{
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var data struct { a uint32 };
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instr := &decInstr{ decUint32, 6, 0, 0 };
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state := newDecState(unsignedResult);
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execDec("uint32", instr, state, t, unsafe.Pointer(&data));
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if data.a != 17 {
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t.Errorf("int a = %v not 17", data.a)
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}
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}
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// int64
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{
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var data struct { a int64 };
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instr := &decInstr{ decInt64, 6, 0, 0 };
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state := newDecState(signedResult);
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execDec("int64", instr, state, t, unsafe.Pointer(&data));
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if data.a != 17 {
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t.Errorf("int a = %v not 17", data.a)
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}
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}
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// uint64
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{
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var data struct { a uint64 };
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instr := &decInstr{ decUint64, 6, 0, 0 };
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state := newDecState(unsignedResult);
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execDec("uint64", instr, state, t, unsafe.Pointer(&data));
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if data.a != 17 {
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t.Errorf("int a = %v not 17", data.a)
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}
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}
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// float
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{
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var data struct { a float };
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instr := &decInstr{ decFloat, 6, 0, 0 };
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state := newDecState(floatResult);
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execDec("float", instr, state, t, unsafe.Pointer(&data));
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if data.a != 17 {
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t.Errorf("int a = %v not 17", data.a)
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}
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}
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// float32
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{
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var data struct { a float32 };
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instr := &decInstr{ decFloat32, 6, 0, 0 };
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state := newDecState(floatResult);
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execDec("float32", instr, state, t, unsafe.Pointer(&data));
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if data.a != 17 {
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t.Errorf("int a = %v not 17", data.a)
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}
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}
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// float64
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{
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var data struct { a float64 };
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instr := &decInstr{ decFloat64, 6, 0, 0 };
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state := newDecState(floatResult);
|
|
execDec("float64", instr, state, t, unsafe.Pointer(&data));
|
|
if data.a != 17 {
|
|
t.Errorf("int a = %v not 17", data.a)
|
|
}
|
|
}
|
|
|
|
// bytes == []uint8
|
|
{
|
|
var data struct { a []byte };
|
|
instr := &decInstr{ decUint8Array, 6, 0, 0 };
|
|
state := newDecState(bytesResult);
|
|
execDec("bytes", instr, state, t, unsafe.Pointer(&data));
|
|
if string(data.a) != "hello" {
|
|
t.Errorf(`bytes a = %q not "hello"`, string(data.a))
|
|
}
|
|
}
|
|
|
|
// string
|
|
{
|
|
var data struct { a string };
|
|
instr := &decInstr{ decString, 6, 0, 0 };
|
|
state := newDecState(bytesResult);
|
|
execDec("bytes", instr, state, t, unsafe.Pointer(&data));
|
|
if data.a != "hello" {
|
|
t.Errorf(`bytes a = %q not "hello"`, data.a)
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
func TestEndToEnd(t *testing.T) {
|
|
type T2 struct {
|
|
t string
|
|
}
|
|
s1 := "string1";
|
|
s2 := "string2";
|
|
type T1 struct {
|
|
a, b,c int;
|
|
n *[3]float;
|
|
strs *[2]string;
|
|
int64s *[]int64;
|
|
s string;
|
|
y []byte;
|
|
t *T2;
|
|
}
|
|
t1 := &T1{
|
|
a: 17,
|
|
b: 18,
|
|
c: -5,
|
|
n: &[3]float{1.5, 2.5, 3.5},
|
|
strs: &[2]string{s1, s2},
|
|
int64s: &[]int64{77, 89, 123412342134},
|
|
s: "Now is the time",
|
|
y: strings.Bytes("hello, sailor"),
|
|
t: &T2{"this is T2"},
|
|
};
|
|
b := new(bytes.Buffer);
|
|
Encode(b, t1);
|
|
var _t1 T1;
|
|
Decode(b, &_t1);
|
|
if !reflect.DeepEqual(t1, &_t1) {
|
|
t.Errorf("encode expected %v got %v", *t1, _t1);
|
|
}
|
|
}
|
|
|
|
func TestNesting(t *testing.T) {
|
|
type RT struct {
|
|
a string;
|
|
next *RT
|
|
}
|
|
rt := new(RT);
|
|
rt.a = "level1";
|
|
rt.next = new(RT);
|
|
rt.next.a = "level2";
|
|
b := new(bytes.Buffer);
|
|
Encode(b, rt);
|
|
var drt RT;
|
|
Decode(b, &drt);
|
|
if drt.a != rt.a {
|
|
t.Errorf("nesting: encode expected %v got %v", *rt, drt);
|
|
}
|
|
if drt.next == nil {
|
|
t.Errorf("nesting: recursion failed");
|
|
}
|
|
if drt.next.a != rt.next.a {
|
|
t.Errorf("nesting: encode expected %v got %v", *rt.next, *drt.next);
|
|
}
|
|
}
|
|
|
|
// These three structures have the same data with different indirections
|
|
type T0 struct {
|
|
a int;
|
|
b int;
|
|
c int;
|
|
d int;
|
|
}
|
|
type T1 struct {
|
|
a int;
|
|
b *int;
|
|
c **int;
|
|
d ***int;
|
|
}
|
|
type T2 struct {
|
|
a ***int;
|
|
b **int;
|
|
c *int;
|
|
d int;
|
|
}
|
|
|
|
func TestAutoIndirection(t *testing.T) {
|
|
// First transfer t1 into t0
|
|
var t1 T1;
|
|
t1.a = 17;
|
|
t1.b = new(int); *t1.b = 177;
|
|
t1.c = new(*int); *t1.c = new(int); **t1.c = 1777;
|
|
t1.d = new(**int); *t1.d = new(*int); **t1.d = new(int); ***t1.d = 17777;
|
|
b := new(bytes.Buffer);
|
|
Encode(b, t1);
|
|
var t0 T0;
|
|
Decode(b, &t0);
|
|
if t0.a != 17 || t0.b != 177 || t0.c != 1777 || t0.d != 17777 {
|
|
t.Errorf("t1->t0: expected {17 177 1777 17777}; got %v", t0);
|
|
}
|
|
|
|
// Now transfer t2 into t0
|
|
var t2 T2;
|
|
t2.d = 17777;
|
|
t2.c = new(int); *t2.c = 1777;
|
|
t2.b = new(*int); *t2.b = new(int); **t2.b = 177;
|
|
t2.a = new(**int); *t2.a = new(*int); **t2.a = new(int); ***t2.a = 17;
|
|
b.Reset();
|
|
Encode(b, t2);
|
|
t0 = T0{};
|
|
Decode(b, &t0);
|
|
if t0.a != 17 || t0.b != 177 || t0.c != 1777 || t0.d != 17777 {
|
|
t.Errorf("t2->t0 expected {17 177 1777 17777}; got %v", t0);
|
|
}
|
|
|
|
// Now transfer t0 into t1
|
|
t0 = T0{17, 177, 1777, 17777};
|
|
b.Reset();
|
|
Encode(b, t0);
|
|
t1 = T1{};
|
|
Decode(b, &t1);
|
|
if t1.a != 17 || *t1.b != 177 || **t1.c != 1777 || ***t1.d != 17777 {
|
|
t.Errorf("t0->t1 expected {17 177 1777 17777}; got {%d %d %d %d}", t1.a, *t1.b, **t1.c, ***t1.d);
|
|
}
|
|
|
|
// Now transfer t0 into t2
|
|
b.Reset();
|
|
Encode(b, t0);
|
|
t2 = T2{};
|
|
Decode(b, &t2);
|
|
if ***t2.a != 17 || **t2.b != 177 || *t2.c != 1777 || t2.d != 17777 {
|
|
t.Errorf("t0->t2 expected {17 177 1777 17777}; got {%d %d %d %d}", ***t2.a, **t2.b, *t2.c, t2.d);
|
|
}
|
|
|
|
// Now do t2 again but without pre-allocated pointers.
|
|
b.Reset();
|
|
Encode(b, t0);
|
|
***t2.a = 0;
|
|
**t2.b = 0;
|
|
*t2.c = 0;
|
|
t2.d = 0;
|
|
Decode(b, &t2);
|
|
if ***t2.a != 17 || **t2.b != 177 || *t2.c != 1777 || t2.d != 17777 {
|
|
t.Errorf("t0->t2 expected {17 177 1777 17777}; got {%d %d %d %d}", ***t2.a, **t2.b, *t2.c, t2.d);
|
|
}
|
|
}
|