Merge package:convert

.github/labeler.yml

@@ -3,3 +3,7 @@
 "package-args":
   - changed-files:
       - any-glob-to-any-file: 'pkgs/args/**'
+
+"package-convert":
+  - changed-files:
+      - any-glob-to-any-file: 'pkgs/convert/**'

.github/workflows/convert.yaml

@@ -0,0 +1,76 @@
+name: Dart CI
+
+on:
+  # Run CI on pushes to the main branch, and on PRs against main.
+  push:
+    branches: [ main ]
+    paths:
+      - '.github/workflows/convert.yaml'
+      - 'pkgs/convert/**'
+  pull_request:
+    branches: [ main ]
+    paths:
+      - '.github/workflows/convert.yaml'
+      - 'pkgs/convert/**'
+  schedule:
+    - cron: "0 0 * * 0"
+env:
+  PUB_ENVIRONMENT: bot.github
+
+defaults:
+  run:
+    working-directory: pkgs/convert/
+
+jobs:
+  # Check code formatting and static analysis on a single OS (linux)
+  # against Dart dev.
+  analyze:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        sdk: [dev]
+    steps:
+      - uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938
+      - uses: dart-lang/setup-dart@0a8a0fc875eb934c15d08629302413c671d3f672
+        with:
+          sdk: ${{ matrix.sdk }}
+      - id: install
+        name: Install dependencies
+        run: dart pub get
+      - name: Check formatting
+        run: dart format --output=none --set-exit-if-changed .
+        if: always() && steps.install.outcome == 'success'
+      - name: Analyze code
+        run: dart analyze --fatal-infos
+        if: always() && steps.install.outcome == 'success'
+
+  # Run tests on a matrix consisting of two dimensions:
+  # 1. OS: ubuntu-latest, (macos-latest, windows-latest)
+  # 2. release sdk: dev
+  test:
+    needs: analyze
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        # Add macos-latest and/or windows-latest if relevant for this package.
+        os: [ubuntu-latest]
+        sdk: [3.4, dev]
+    steps:
+      - uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938
+      - uses: dart-lang/setup-dart@0a8a0fc875eb934c15d08629302413c671d3f672
+        with:
+          sdk: ${{ matrix.sdk }}
+      - id: install
+        name: Install dependencies
+        run: dart pub get
+      - name: Run VM tests
+        run: dart test --platform vm
+        if: always() && steps.install.outcome == 'success'
+      - name: Run Chrome tests
+        run: dart test --platform chrome
+        if: always() && steps.install.outcome == 'success'
+      - name: Run Chrome tests - wasm
+        run: dart test --platform chrome --compiler dart2wasm
+        if: always() && steps.install.outcome == 'success'

README.md

@@ -9,6 +9,7 @@ This repository is home to various Dart packages under the [dart.dev](https://pu
 | Package | Description | Version |
 |---|---|---|
 | [args](pkgs/args/) | Library for defining parsers for parsing raw command-line arguments into a set of options and values. | [![pub package](https://img.shields.io/pub/v/args.svg)](https://pub.dev/packages/args) |
+| [convert](pkgs/convert/) | Utilities for converting between data representations. | [![pub package](https://img.shields.io/pub/v/convert.svg)](https://pub.dev/packages/convert) |
 
 ## Publishing automation
 

pkgs/convert/.gitignore

@@ -0,0 +1,3 @@
+.dart_tool
+.packages
+pubspec.lock

pkgs/convert/AUTHORS

@@ -0,0 +1,6 @@
+# Below is a list of people and organizations that have contributed
+# to the project. Names should be added to the list like so:
+#
+#   Name/Organization <email address>
+
+Google Inc.

pkgs/convert/CHANGELOG.md

@@ -0,0 +1,75 @@
+## 3.1.2
+
+- Require Dart 3.4
+- Add chunked decoding support (`startChunkedConversion`) for `CodePage`
+  encodings.
+- Upper-cast the return type of the decoder from `List<int>` to `Uint8List`.
+- Move to `dart-lang/core` monorepo.
+
+## 3.1.1
+
+- Require Dart 2.18
+- Fix a number of comment references.
+
+## 3.1.0
+
+- Add a fixed-pattern DateTime formatter. See
+  [#210](https://github.com/dart-lang/intl/issues/210) in package:intl.
+
+## 3.0.2
+
+- Fix bug in `CodePage` class. See issue
+  [#47](https://github.com/dart-lang/convert/issues/47).
+
+## 3.0.1
+
+- Dependency clean-up.
+
+## 3.0.0
+
+- Stable null safety release.
+- Added `CodePage` class for single-byte `Encoding` implementations.
+
+## 2.1.1
+
+- Fixed a DDC compilation regression for consumers using the Dart 1.x SDK that
+  was introduced in `2.1.0`.
+
+## 2.1.0
+
+- Added an `IdentityCodec<T>` which implements `Codec<T,T>` for use as default
+  value for in functions accepting an optional `Codec` as parameter.
+
+## 2.0.2
+
+- Set max SDK version to `<3.0.0`, and adjust other dependencies.
+
+## 2.0.1
+
+- `PercentEncoder` no longer encodes digits. This follows the specified
+  behavior.
+
+## 2.0.0
+
+**Note**: No new APIs have been added in 2.0.0. Packages that would use 2.0.0 as
+a lower bound should use 1.0.0 instead—for example, `convert: ">=1.0.0 <3.0.0"`.
+
+- `HexDecoder`, `HexEncoder`, `PercentDecoder`, and `PercentEncoder` no longer
+  extend `ChunkedConverter`.
+
+## 1.1.1
+
+- Fix all strong-mode warnings.
+
+## 1.1.0
+
+- Add `AccumulatorSink`, `ByteAccumulatorSink`, and `StringAccumulatorSink`
+  classes for providing synchronous access to the output of chunked converters.
+
+## 1.0.1
+
+- Small improvement in percent decoder efficiency.
+
+## 1.0.0
+
+- Initial version

pkgs/convert/CONTRIBUTING.md

@@ -0,0 +1,33 @@
+Want to contribute? Great! First, read this page (including the small print at
+the end).
+
+### Before you contribute
+Before we can use your code, you must sign the
+[Google Individual Contributor License Agreement](https://cla.developers.google.com/about/google-individual)
+(CLA), which you can do online. The CLA is necessary mainly because you own the
+copyright to your changes, even after your contribution becomes part of our
+codebase, so we need your permission to use and distribute your code. We also
+need to be sure of various other things—for instance that you'll tell us if you
+know that your code infringes on other people's patents. You don't have to sign
+the CLA until after you've submitted your code for review and a member has
+approved it, but you must do it before we can put your code into our codebase.
+
+Before you start working on a larger contribution, you should get in touch with
+us first through the issue tracker with your idea so that we can help out and
+possibly guide you. Coordinating up front makes it much easier to avoid
+frustration later on.
+
+### Code reviews
+All submissions, including submissions by project members, require review.
+
+### File headers
+All files in the project must start with the following header.
+
+    // Copyright (c) 2015, 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.
+
+### The small print
+Contributions made by corporations are covered by a different agreement than the
+one above, the
+[Software Grant and Corporate Contributor License Agreement](https://developers.google.com/open-source/cla/corporate).

pkgs/convert/LICENSE

@@ -0,0 +1,27 @@
+Copyright 2015, the Dart project authors.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of Google LLC nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

pkgs/convert/README.md

@@ -0,0 +1,9 @@
+[![Dart CI](https://github.com/dart-lang/core/actions/workflows/convert.yaml/badge.svg)](https://github.com/dart-lang/core/actions/workflows/convert.yaml)
+[![pub package](https://img.shields.io/pub/v/convert.svg)](https://pub.dev/packages/convert)
+[![package publisher](https://img.shields.io/pub/publisher/convert.svg)](https://pub.dev/packages/convert/publisher)
+
+Contains encoders and decoders for converting between different
+data representations. It's the external counterpart of the
+[`dart:convert`](https://api.dart.dev/dart-convert/dart-convert-library.html)
+SDK library, and contains less-central APIs and APIs that need more flexible
+versioning.

pkgs/convert/analysis_options.yaml

@@ -0,0 +1,24 @@
+# https://dart.dev/guides/language/analysis-options
+include: package:dart_flutter_team_lints/analysis_options.yaml
+
+analyzer:
+  language:
+    strict-casts: true
+    strict-raw-types: true
+
+linter:
+  rules:
+    - avoid_private_typedef_functions
+    - avoid_redundant_argument_values
+    - avoid_unused_constructor_parameters
+    - avoid_void_async
+    - cancel_subscriptions
+    - literal_only_boolean_expressions
+    - missing_whitespace_between_adjacent_strings
+    - no_adjacent_strings_in_list
+    - no_runtimeType_toString
+    - package_api_docs
+    - prefer_const_declarations
+    - prefer_expression_function_bodies
+    - unnecessary_await_in_return
+    - use_string_buffers

pkgs/convert/benchmark/fixed_datetime_formatter_benchmark.dart

@@ -0,0 +1,23 @@
+// Copyright (c) 2022, 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.
+
+import 'package:benchmark_harness/benchmark_harness.dart';
+import 'package:convert/convert.dart';
+
+/// Test the performance of [FixedDateTimeFormatter.decode].
+class DecodeBenchmark extends BenchmarkBase {
+  final fixedDateTimeFormatter = FixedDateTimeFormatter('YYYYMMDDhhmmss');
+  DecodeBenchmark() : super('Parse 10k strings to DateTime');
+
+  @override
+  void run() {
+    for (var i = 0; i < 10000; i++) {
+      fixedDateTimeFormatter.decode('19960425050322');
+    }
+  }
+}
+
+void main() {
+  DecodeBenchmark().report();
+}

pkgs/convert/example/example.dart

@@ -0,0 +1,20 @@
+// Copyright (c) 2020, 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.
+
+import 'dart:convert';
+
+import 'package:convert/convert.dart';
+
+void main(List<String> args) {
+  // Creates a Codec that converts a UTF-8 strings to/from percent encoding
+  final fusedCodec = utf8.fuse(percent);
+
+  final input = args.isNotEmpty ? args.first : 'ABC 123 @!(';
+  print(input);
+  final encodedMessage = fusedCodec.encode(input);
+  print(encodedMessage);
+
+  final decodedMessage = fusedCodec.decode(encodedMessage);
+  assert(decodedMessage == input);
+}

pkgs/convert/lib/convert.dart

@@ -0,0 +1,12 @@
+// Copyright (c) 2015, 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.
+
+export 'src/accumulator_sink.dart';
+export 'src/byte_accumulator_sink.dart';
+export 'src/codepage.dart';
+export 'src/fixed_datetime_formatter.dart';
+export 'src/hex.dart';
+export 'src/identity_codec.dart';
+export 'src/percent.dart';
+export 'src/string_accumulator_sink.dart';

pkgs/convert/lib/src/accumulator_sink.dart

@@ -0,0 +1,40 @@
+// 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.
+
+import 'dart:collection';
+import 'dart:convert';
+
+/// A sink that provides access to all the [events] that have been passed to it.
+///
+/// See also [ChunkedConversionSink.withCallback].
+class AccumulatorSink<T> implements Sink<T> {
+  /// An unmodifiable list of events passed to this sink so far.
+  List<T> get events => UnmodifiableListView(_events);
+  final _events = <T>[];
+
+  /// Whether [close] has been called.
+  bool get isClosed => _isClosed;
+  var _isClosed = false;
+
+  /// Removes all events from [events].
+  ///
+  /// This can be used to avoid double-processing events.
+  void clear() {
+    _events.clear();
+  }
+
+  @override
+  void add(T event) {
+    if (_isClosed) {
+      throw StateError("Can't add to a closed sink.");
+    }
+
+    _events.add(event);
+  }
+
+  @override
+  void close() {
+    _isClosed = true;
+  }
+}