mirror of
https://github.com/golang/go.git
synced 2025-12-08 06:10:04 +00:00
encoders for booleans and numbers.
R=rsc DELTA=610 (597 added, 5 deleted, 8 changed) OCL=30934 CL=30939
This commit is contained in:
Rob Pike
parent
832e72beff
commit
f6f825141a
4 changed files with 605 additions and 13 deletions
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@ -9,6 +9,7 @@ import (
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"gob";
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"os";
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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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@ -95,3 +96,354 @@ func TestIntCodec(t *testing.T) {
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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 three true booleans with field numbers 0, 1, 2
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var boolResult = []byte{0x80, 0x81, 0x81, 0x81, 0x82, 0x81}
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// The result of encoding three numbers = 17 with field numbers 0, 1, 2
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var signedResult = []byte{0x80, 0xa2, 0x81, 0xa2, 0x82, 0xa2}
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var unsignedResult = []byte{0x80, 0x91, 0x81, 0x91, 0x82, 0x91}
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var floatResult = []byte{0x80, 0x40, 0xe2, 0x81, 0x40, 0xe2, 0x82, 0x40, 0xe2}
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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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var state encState;
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// bool
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{
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b.Reset();
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v := true;
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pv := &v;
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ppv := &pv;
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data := (struct { a bool; b *bool; c **bool }){ v, pv, ppv };
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instr := &encInstr{ encBool, 0, 0, 0 };
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state.w = b;
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state.base = uintptr(unsafe.Pointer(&data));
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instr.op(instr, &state);
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instr.field = 1;
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instr.indir = 1;
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instr.offset = uintptr(unsafe.Offsetof(data.b));
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instr.op(instr, &state);
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instr.field = 2;
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instr.indir = 2;
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instr.offset = uintptr(unsafe.Offsetof(data.c));
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instr.op(instr, &state);
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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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v := 17;
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pv := &v;
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ppv := &pv;
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data := (struct { a int; b *int; c **int }){ v, pv, ppv };
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instr := &encInstr{ encInt, 0, 0, 0 };
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state.w = b;
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state.base = uintptr(unsafe.Pointer(&data));
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instr.op(instr, &state);
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instr.field = 1;
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instr.indir = 1;
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instr.offset = uintptr(unsafe.Offsetof(data.b));
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instr.op(instr, &state);
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instr.field = 2;
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instr.indir = 2;
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instr.offset = uintptr(unsafe.Offsetof(data.c));
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instr.op(instr, &state);
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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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v := uint(17);
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pv := &v;
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ppv := &pv;
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data := (struct { a uint; b *uint; c **uint }){ v, pv, ppv };
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instr := &encInstr{ encUint, 0, 0, 0 };
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state.w = b;
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state.base = uintptr(unsafe.Pointer(&data));
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instr.op(instr, &state);
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instr.field = 1;
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instr.indir = 1;
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instr.offset = uintptr(unsafe.Offsetof(data.b));
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instr.op(instr, &state);
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instr.field = 2;
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instr.indir = 2;
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instr.offset = uintptr(unsafe.Offsetof(data.c));
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instr.op(instr, &state);
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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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v := int8(17);
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pv := &v;
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ppv := &pv;
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data := (struct { a int8; b *int8; c **int8 }){ v, pv, ppv };
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instr := &encInstr{ encInt, 0, 0, 0 };
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state.w = b;
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state.base = uintptr(unsafe.Pointer(&data));
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instr.op(instr, &state);
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instr.field = 1;
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instr.indir = 1;
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instr.offset = uintptr(unsafe.Offsetof(data.b));
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instr.op(instr, &state);
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instr.field = 2;
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instr.indir = 2;
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instr.offset = uintptr(unsafe.Offsetof(data.c));
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instr.op(instr, &state);
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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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v := uint8(17);
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pv := &v;
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ppv := &pv;
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data := (struct { a uint8; b *uint8; c **uint8 }){ v, pv, ppv };
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instr := &encInstr{ encUint, 0, 0, 0 };
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state.w = b;
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state.base = uintptr(unsafe.Pointer(&data));
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instr.op(instr, &state);
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instr.field = 1;
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instr.indir = 1;
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instr.offset = uintptr(unsafe.Offsetof(data.b));
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instr.op(instr, &state);
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instr.field = 2;
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instr.indir = 2;
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instr.offset = uintptr(unsafe.Offsetof(data.c));
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instr.op(instr, &state);
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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; b *int16; c **int16 }){ v, pv, ppv };
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instr := &encInstr{ encInt16, 0, 0, 0 };
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state.w = b;
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state.base = uintptr(unsafe.Pointer(&data));
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instr.op(instr, &state);
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instr.field = 1;
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instr.indir = 1;
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instr.offset = uintptr(unsafe.Offsetof(data.b));
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instr.op(instr, &state);
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instr.field = 2;
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instr.indir = 2;
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instr.offset = uintptr(unsafe.Offsetof(data.c));
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instr.op(instr, &state);
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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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v := uint16(17);
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pv := &v;
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ppv := &pv;
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data := (struct { a uint16; b *uint16; c **uint16 }){ v, pv, ppv };
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instr := &encInstr{ encUint16, 0, 0, 0 };
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state.w = b;
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state.base = uintptr(unsafe.Pointer(&data));
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instr.op(instr, &state);
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instr.field = 1;
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instr.indir = 1;
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instr.offset = uintptr(unsafe.Offsetof(data.b));
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instr.op(instr, &state);
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instr.field = 2;
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instr.indir = 2;
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instr.offset = uintptr(unsafe.Offsetof(data.c));
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instr.op(instr, &state);
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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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v := int32(17);
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pv := &v;
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ppv := &pv;
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data := (struct { a int32; b *int32; c **int32 }){ v, pv, ppv };
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instr := &encInstr{ encInt32, 0, 0, 0 };
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state.w = b;
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state.base = uintptr(unsafe.Pointer(&data));
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instr.op(instr, &state);
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instr.field = 1;
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instr.indir = 1;
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instr.offset = uintptr(unsafe.Offsetof(data.b));
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instr.op(instr, &state);
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instr.field = 2;
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instr.indir = 2;
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instr.offset = uintptr(unsafe.Offsetof(data.c));
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instr.op(instr, &state);
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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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v := uint32(17);
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pv := &v;
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ppv := &pv;
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data := (struct { a uint32; b *uint32; c **uint32 }){ v, pv, ppv };
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instr := &encInstr{ encUint32, 0, 0, 0 };
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state.w = b;
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state.base = uintptr(unsafe.Pointer(&data));
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instr.op(instr, &state);
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instr.field = 1;
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instr.indir = 1;
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instr.offset = uintptr(unsafe.Offsetof(data.b));
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instr.op(instr, &state);
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instr.field = 2;
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instr.indir = 2;
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instr.offset = uintptr(unsafe.Offsetof(data.c));
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instr.op(instr, &state);
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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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v := int64(17);
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pv := &v;
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ppv := &pv;
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data := (struct { a int64; b *int64; c **int64 }){ v, pv, ppv };
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instr := &encInstr{ encInt64, 0, 0, 0 };
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state.w = b;
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state.base = uintptr(unsafe.Pointer(&data));
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instr.op(instr, &state);
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instr.field = 1;
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instr.indir = 1;
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instr.offset = uintptr(unsafe.Offsetof(data.b));
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instr.op(instr, &state);
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instr.field = 2;
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instr.indir = 2;
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instr.offset = uintptr(unsafe.Offsetof(data.c));
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instr.op(instr, &state);
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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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v := uint64(17);
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pv := &v;
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ppv := &pv;
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data := (struct { a uint64; b *uint64; c **uint64 }){ v, pv, ppv };
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instr := &encInstr{ encUint, 0, 0, 0 };
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state.w = b;
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state.base = uintptr(unsafe.Pointer(&data));
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instr.op(instr, &state);
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instr.field = 1;
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instr.indir = 1;
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instr.offset = uintptr(unsafe.Offsetof(data.b));
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instr.op(instr, &state);
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instr.field = 2;
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instr.indir = 2;
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instr.offset = uintptr(unsafe.Offsetof(data.c));
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instr.op(instr, &state);
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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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v := float(17);
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pv := &v;
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ppv := &pv;
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data := (struct { a float; b *float; c **float }){ v, pv, ppv };
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instr := &encInstr{ encFloat, 0, 0, 0 };
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state.w = b;
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state.base = uintptr(unsafe.Pointer(&data));
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instr.op(instr, &state);
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instr.field = 1;
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instr.indir = 1;
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instr.offset = uintptr(unsafe.Offsetof(data.b));
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instr.op(instr, &state);
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instr.field = 2;
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instr.indir = 2;
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instr.offset = uintptr(unsafe.Offsetof(data.c));
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instr.op(instr, &state);
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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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v := float32(17);
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pv := &v;
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ppv := &pv;
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data := (struct { a float32; b *float32; c **float32 }){ v, pv, ppv };
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instr := &encInstr{ encFloat32, 0, 0, 0 };
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state.w = b;
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state.base = uintptr(unsafe.Pointer(&data));
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instr.op(instr, &state);
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instr.field = 1;
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instr.indir = 1;
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instr.offset = uintptr(unsafe.Offsetof(data.b));
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instr.op(instr, &state);
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instr.field = 2;
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instr.indir = 2;
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instr.offset = uintptr(unsafe.Offsetof(data.c));
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instr.op(instr, &state);
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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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v := float64(17);
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pv := &v;
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ppv := &pv;
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data := (struct { a float64; b *float64; c **float64 }){ v, pv, ppv };
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instr := &encInstr{ encFloat64, 0, 0, 0 };
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state.w = b;
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state.base = uintptr(unsafe.Pointer(&data));
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instr.op(instr, &state);
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instr.field = 1;
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instr.indir = 1;
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instr.offset = uintptr(unsafe.Offsetof(data.b));
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instr.op(instr, &state);
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instr.field = 2;
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instr.indir = 2;
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instr.offset = uintptr(unsafe.Offsetof(data.c));
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instr.op(instr, &state);
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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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}
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