Remove deprecated APIs.

lib/src/base64/encoder.dart

-// 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.
-
-import 'dart:convert';
-
-import 'package:charcode/ascii.dart';
-
-import 'encoder_sink.dart';
-
-/// A String representing a mapping from numbers between 0 and 63, inclusive, to
-/// their corresponding encoded character.
-///
-/// This is the table for URL-safe encodings.
-const _encodeTableUrlSafe =
-    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";
-
-/// A String representing a mapping from numbers between 0 and 63, inclusive, to
-/// their corresponding encoded character.
-///
-/// This is the table for URL-unsafe encodings.
-const _encodeTable =
-    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-
-/// The line length for Base64 strings with line separators.
-const _lineLength = 76;
-
-/// This is deprecated.
-///
-/// Use the `Base64Encoder` class in `dart:convert` instead.
-@Deprecated("Will be removed in crypto 1.0.0.")
-class Base64Encoder extends Converter<List<int>, String> {
-  /// Whether this encoder generates URL-safe strings.
-  final bool _urlSafe;
-
-  /// Whether this encoder adds line breaks to the output.
-  final bool _addLineSeparator;
-
-  /// The sequence of bytes to use as a padding character.
-  final List<int> _pad;
-
-  /// Creates a new [Base64Encoder].
-  ///
-  /// The default [BASE64.encoder] will be good enough for most cases. A new
-  /// codec only needs to be instantiated when you want to do multiple
-  /// conversions with the same configuration.
-  ///
-  /// If [urlSafe] is `true`, a URL-safe alphabet will be used. Specifically,
-  /// the characters `-` and `_` will be used instead of `+` and `/`.
-  ///
-  /// If [addLineSeparator] is `true`, `\r\n` line separators will be added
-  /// every 76 characters.
-  ///
-  /// If [encodePaddingCharacter] is `true`, the padding character `=` will be
-  /// written as `%3D`.
-  const Base64Encoder(
-      {bool urlSafe: false,
-      bool addLineSeparator: false,
-      bool encodePaddingCharacter: false})
-      : _urlSafe = urlSafe,
-        _addLineSeparator = addLineSeparator,
-        _pad = encodePaddingCharacter
-            ? const [$percent, $3, $D]
-            : const [$equal];
-
-  /// Converts [bytes] to Base64.
-  ///
-  /// If [start] and [end] are provided, only the sublist `bytes.sublist(start,
-  /// end)` is converted.
-  String convert(List<int> bytes, [int start = 0, int end]) {
-    RangeError.checkValidRange(start, end, bytes.length);
-    if (end == null) end = bytes.length;
-
-    var length = end - start;
-    if (length == 0) return "";
-
-    var lookup = _urlSafe ? _encodeTableUrlSafe : _encodeTable;
-
-    // The total length of the 24-bit chunks.
-    var remainderLength = length.remainder(3);
-    var chunkLength = length - remainderLength;
-
-    // The size of the base output.
-    var baseOutputLength = (length ~/ 3) * 4;
-    var remainderOutputLength = remainderLength > 0 ? 3 + _pad.length : 0;
-
-    var outputLength = baseOutputLength + remainderOutputLength;
-    if (_addLineSeparator) {
-      // Add extra expected length to account for line separators.
-      outputLength += ((outputLength - 1) ~/ _lineLength) * 2;
-    }
-    var out = new List<int>(outputLength);
-
-    // Encode 24 bit chunks.
-    var input = start;
-    var output = 0;
-    var chunks = 0;
-    while (input < chunkLength) {
-      // Get a 24-bit chunk from the next three input bytes. Mask each byte to
-      // make sure we don't do something bad if the user passes in non-byte
-      // ints.
-      var chunk = (bytes[input++] << 16) & 0x00FF0000;
-      chunk    |= (bytes[input++] << 8)  & 0x0000FF00;
-      chunk    |=  bytes[input++]        & 0x000000FF;
-
-      // Split the 24-bit chunk into four 6-bit sections to encode as
-      // characters.
-      out[output++] = lookup.codeUnitAt(chunk >> 18);
-      out[output++] = lookup.codeUnitAt((chunk >> 12) & 0x3F);
-      out[output++] = lookup.codeUnitAt((chunk >> 6) & 0x3F);
-      out[output++] = lookup.codeUnitAt(chunk & 0x3F);
-
-      // Add an optional line separator for every 76 characters we emit; that
-      // is, every 19 chunks.
-      chunks++;
-      if (_addLineSeparator && chunks == 19 && output < outputLength - 2) {
-        out[output++] = $cr;
-        out[output++] = $lf;
-        chunks = 0;
-      }
-    }
-
-    // If the input length isn't a multiple of 3, encode the remaining bytes and
-    // add padding.
-    if (remainderLength == 1) {
-      var byte = bytes[input];
-      out[output++] = lookup.codeUnitAt(byte >> 2);
-      out[output++] = lookup.codeUnitAt((byte << 4) & 0x3F);
-      out.setRange(output, output + _pad.length, _pad);
-      out.setRange(output + _pad.length, output + 2 * _pad.length, _pad);
-    } else if (remainderLength == 2) {
-      var byte1 = bytes[input++];
-      var byte2 = bytes[input];
-      out[output++] = lookup.codeUnitAt(byte1 >> 2);
-      out[output++] = lookup.codeUnitAt(((byte1 << 4) | (byte2 >> 4)) & 0x3F);
-      out[output++] = lookup.codeUnitAt((byte2 << 2) & 0x3F);
-      out.setRange(output, output + _pad.length, _pad);
-    }
-
-    return new String.fromCharCodes(out);
-  }
-
-  Base64EncoderSink startChunkedConversion(Sink<String> sink) {
-    StringConversionSink stringSink = sink is StringConversionSink
-        ? sink
-        : new StringConversionSink.from(sink);
-
-    return new Base64EncoderSink(stringSink, _urlSafe, _addLineSeparator);
-  }
-}