diff options
Diffstat (limited to 'src/mscorlib/shared/System/StringComparer.cs')
-rw-r--r-- | src/mscorlib/shared/System/StringComparer.cs | 137 |
1 files changed, 119 insertions, 18 deletions
diff --git a/src/mscorlib/shared/System/StringComparer.cs b/src/mscorlib/shared/System/StringComparer.cs index b327e770d5..6990378812 100644 --- a/src/mscorlib/shared/System/StringComparer.cs +++ b/src/mscorlib/shared/System/StringComparer.cs @@ -6,15 +6,17 @@ using System.Collections; using System.Collections.Generic; using System.Globalization; using System.Diagnostics.Contracts; +using System.Runtime.Serialization; namespace System { [Serializable] + [System.Runtime.CompilerServices.TypeForwardedFrom("mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")] public abstract class StringComparer : IComparer, IEqualityComparer, IComparer<string>, IEqualityComparer<string> { private static readonly CultureAwareComparer s_invariantCulture = new CultureAwareComparer(CultureInfo.InvariantCulture, false); private static readonly CultureAwareComparer s_invariantCultureIgnoreCase = new CultureAwareComparer(CultureInfo.InvariantCulture, true); - private static readonly OrdinalComparer s_ordinal = new OrdinalComparer(); + private static readonly OrdinalCaseSensitiveComparer s_ordinal = new OrdinalCaseSensitiveComparer(); private static readonly OrdinalIgnoreCaseComparer s_ordinalIgnoreCase = new OrdinalIgnoreCaseComparer(); public static StringComparer InvariantCulture @@ -170,30 +172,33 @@ namespace System } [Serializable] + [System.Runtime.CompilerServices.TypeForwardedFrom("mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")] internal sealed class CultureAwareComparer : StringComparer { - private readonly CompareInfo _compareInfo; - private readonly CompareOptions _options; + private readonly CompareInfo _compareInfo; // Do not rename (binary serialization) + private readonly bool _ignoreCase; // Do not rename (binary serialization) internal CultureAwareComparer(CultureInfo culture, bool ignoreCase) { _compareInfo = culture.CompareInfo; - _options = ignoreCase ? CompareOptions.IgnoreCase : CompareOptions.None; + _ignoreCase = ignoreCase; } + private CompareOptions Options => _ignoreCase ? CompareOptions.IgnoreCase : CompareOptions.None; + public override int Compare(string x, string y) { if (object.ReferenceEquals(x, y)) return 0; if (x == null) return -1; if (y == null) return 1; - return _compareInfo.Compare(x, y, _options); + return _compareInfo.Compare(x, y, Options); } public override bool Equals(string x, string y) { if (object.ReferenceEquals(x, y)) return true; if (x == null || y == null) return false; - return _compareInfo.Compare(x, y, _options) == 0; + return _compareInfo.Compare(x, y, Options) == 0; } public override int GetHashCode(string obj) @@ -202,7 +207,7 @@ namespace System { throw new ArgumentNullException(nameof(obj)); } - return _compareInfo.GetHashCodeOfString(obj, _options); + return _compareInfo.GetHashCodeOfString(obj, Options); } // Equals method for the comparer itself. @@ -211,20 +216,108 @@ namespace System CultureAwareComparer comparer = obj as CultureAwareComparer; return comparer != null && - _options == comparer._options && + _ignoreCase == comparer._ignoreCase && _compareInfo.Equals(comparer._compareInfo); } public override int GetHashCode() { int hashCode = _compareInfo.GetHashCode(); - return _options == CompareOptions.None ? hashCode : ~hashCode; + return _ignoreCase ? ~hashCode : hashCode; + } + } + + [Serializable] + [System.Runtime.CompilerServices.TypeForwardedFrom("mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")] + internal class OrdinalComparer : StringComparer + { + private readonly bool _ignoreCase; // Do not rename (binary serialization) + + internal OrdinalComparer(bool ignoreCase) + { + _ignoreCase = ignoreCase; + } + + public override int Compare(string x, string y) + { + if (ReferenceEquals(x, y)) + return 0; + if (x == null) + return -1; + if (y == null) + return 1; + + if (_ignoreCase) + { + return string.Compare(x, y, StringComparison.OrdinalIgnoreCase); + } + + return string.CompareOrdinal(x, y); + } + + public override bool Equals(string x, string y) + { + if (ReferenceEquals(x, y)) + return true; + if (x == null || y == null) + return false; + + if (_ignoreCase) + { + if (x.Length != y.Length) + { + return false; + } + return (string.Compare(x, y, StringComparison.OrdinalIgnoreCase) == 0); + } + return x.Equals(y); + } + + public override int GetHashCode(string obj) + { + if (obj == null) + { +#if CORECLR + ThrowHelper.ThrowArgumentNullException(ExceptionArgument.obj); +#else + throw new ArgumentNullException(nameof(obj)); +#endif + } + Contract.EndContractBlock(); + + if (_ignoreCase) + { + return TextInfo.GetHashCodeOrdinalIgnoreCase(obj); + } + + return obj.GetHashCode(); + } + + // Equals method for the comparer itself. + public override bool Equals(object obj) + { + OrdinalComparer comparer = obj as OrdinalComparer; + if (comparer == null) + { + return false; + } + return (this._ignoreCase == comparer._ignoreCase); + } + + public override int GetHashCode() + { + int hashCode = nameof(OrdinalComparer).GetHashCode(); + return _ignoreCase ? (~hashCode) : hashCode; } } [Serializable] - internal sealed class OrdinalComparer : StringComparer + internal sealed class OrdinalCaseSensitiveComparer : OrdinalComparer, ISerializable { + public OrdinalCaseSensitiveComparer() : base(false) + { + } + public override int Compare(string x, string y) => string.CompareOrdinal(x, y); public override bool Equals(string x, string y) => string.Equals(x, y); @@ -242,14 +335,20 @@ namespace System return obj.GetHashCode(); } - // Equals/GetHashCode methods for the comparer itself. - public override bool Equals(object obj) => obj is OrdinalComparer; - public override int GetHashCode() => nameof(OrdinalComparer).GetHashCode(); + public void GetObjectData(SerializationInfo info, StreamingContext context) + { + info.SetType(typeof(OrdinalComparer)); + info.AddValue("_ignoreCase", false); + } } - [Serializable] - internal sealed class OrdinalIgnoreCaseComparer : StringComparer + [Serializable] + internal sealed class OrdinalIgnoreCaseComparer : OrdinalComparer, ISerializable { + public OrdinalIgnoreCaseComparer() : base(true) + { + } + public override int Compare(string x, string y) => string.Compare(x, y, StringComparison.OrdinalIgnoreCase); public override bool Equals(string x, string y) => string.Equals(x, y, StringComparison.OrdinalIgnoreCase); @@ -267,8 +366,10 @@ namespace System return TextInfo.GetHashCodeOrdinalIgnoreCase(obj); } - // Equals/GetHashCode methods for the comparer itself. - public override bool Equals(object obj) => obj is OrdinalIgnoreCaseComparer; - public override int GetHashCode() => nameof(OrdinalIgnoreCaseComparer).GetHashCode(); + public void GetObjectData(SerializationInfo info, StreamingContext context) + { + info.SetType(typeof(OrdinalComparer)); + info.AddValue("_ignoreCase", true); + } } } |