blob: b94ae42ac9b47e3438f458a856b1c4134ee03357 [file] [log] [blame]
// Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
library kernel.round_trip;
import 'dart:io';
import 'package:kernel/binary/ast_from_binary.dart';
import 'package:kernel/binary/ast_to_binary.dart';
import 'package:kernel/kernel.dart';
const String usage = '''
Usage: round_trip.dart FILE.dill [sdk.dill]
Deserialize and serialize the given component and check that the resulting byte
sequence is identical to the original.
''';
void main(List<String> args) async {
if (args.length == 1) {
await testRoundTrip(new File(args[0]).readAsBytesSync(), null);
} else if (args.length == 2) {
await testRoundTrip(new File(args[0]).readAsBytesSync(),
new File(args[1]).readAsBytesSync());
} else {
print(usage);
exit(1);
}
}
void testRoundTrip(List<int> bytes, List<int> sdkBytes) async {
var component = new Component();
if (sdkBytes != null) {
var sdk = new Component(nameRoot: component.root);
new BinaryBuilder(sdkBytes).readSingleFileComponent(sdk);
}
new BinaryBuilder(bytes).readSingleFileComponent(component);
ByteSink sink = new ByteSink();
new BinaryPrinter(sink).writeComponentFile(component);
List<int> writtenBytes = sink.builder.takeBytes();
if (bytes.length != writtenBytes.length) {
throw "Byte-lengths differ: ${bytes.length} vs ${writtenBytes.length}";
}
for (int i = 0; i < bytes.length; i++) {
if (bytes[i] != writtenBytes[i]) {
throw "Byte differs at index $i: "
"${show(bytes[i])} vs ${show(writtenBytes[i])}";
}
}
print("OK");
}
String show(int byte) {
return '$byte (0x${byte.toRadixString(16).padLeft(2, "0")})';
}
/// A [Sink] that directly writes data into a byte builder.
class ByteSink implements Sink<List<int>> {
final BytesBuilder builder = new BytesBuilder();
void add(List<int> data) {
builder.add(data);
}
void close() {}
}