52 lines
1.5 KiB
Dart
52 lines
1.5 KiB
Dart
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import 'dart:io';
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import 'dart:typed_data';
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import 'package:pure_zstd/pure_zstd.dart';
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/// Decodes every `*.zst` in a directory and compares it to the `*.raw`
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/// beside it. Driven by tool/oracle.py, which writes the pair.
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void main(List<String> arguments) {
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if (arguments.length != 1) {
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stderr.writeln('usage: verify.dart <directory>');
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exit(2);
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}
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final directory = Directory(arguments.single);
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final frames =
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directory
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.listSync()
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.whereType<File>()
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.where((file) => file.path.endsWith('.zst'))
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.toList()
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..sort((a, b) => a.path.compareTo(b.path));
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final decoder = ZstdDecoder();
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var checked = 0;
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var bytes = 0;
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for (final frame in frames) {
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final expected = File(
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frame.path.replaceRange(frame.path.length - 4, null, '.raw'),
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).readAsBytesSync();
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final Uint8List actual;
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try {
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actual = decoder.decode(frame.readAsBytesSync());
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} on ZstdException catch (error) {
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stderr.writeln('${frame.path}: $error');
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exit(1);
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}
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if (actual.length != expected.length) {
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stderr.writeln(
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'${frame.path}: ${actual.length} bytes, expected ${expected.length}',
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);
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exit(1);
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}
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for (var i = 0; i < actual.length; i++) {
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if (actual[i] != expected[i]) {
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stderr.writeln('${frame.path}: byte $i differs');
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exit(1);
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}
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}
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checked++;
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bytes += actual.length;
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}
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stdout.writeln('$checked frames, $bytes bytes, identical');
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}
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