mirror of https://github.com/dahall/Vanara.git
289 lines
12 KiB
C#
289 lines
12 KiB
C#
using System;
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using System.ComponentModel;
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using System.Globalization;
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using System.Runtime.InteropServices;
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namespace Vanara.PInvoke
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{
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/// <summary>Managed instance of the SIZE_T type.</summary>
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[StructLayout(LayoutKind.Sequential), Serializable]
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[TypeConverter(typeof(SizeTTypeConverter))]
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public struct SizeT : IEquatable<SizeT>, IComparable<SizeT>, IConvertible, IComparable
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{
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/// <summary>Represents the smallest possible value of <see cref="SizeT"/>. This field is constant.</summary>
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public static readonly SizeT MinValue = 0;
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/// <summary>Represents the zero value of <see cref="SizeT"/>. This field is constant.</summary>
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public static readonly SizeT Zero = default;
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private UIntPtr val;
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/// <summary>Initializes a new instance of the <see cref="SizeT"/> struct.</summary>
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/// <param name="value">The value.</param>
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public SizeT(uint value) => val = (UIntPtr)value;
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/// <summary>Initializes a new instance of the <see cref="SizeT"/> struct.</summary>
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/// <param name="value">The value.</param>
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public SizeT(ulong value) => val = new UIntPtr(value);
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/// <summary>
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/// Represents the largest possible value of <see cref="SizeT"/>. This property is determined by the maximum bit-size of a pointer.
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/// </summary>
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public static SizeT MaxValue => UIntPtr.Size == 8 ? ulong.MaxValue : uint.MaxValue;
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/// <summary>Gets the value.</summary>
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/// <value>The value.</value>
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public ulong Value { get => val.ToUInt64(); private set => val = new UIntPtr(value); }
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/// <summary>Performs an implicit conversion from <see cref="System.Int32"/> to <see cref="SizeT"/>.</summary>
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/// <param name="value">The value.</param>
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/// <returns>The result of the conversion.</returns>
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public static implicit operator SizeT(int value) => value >= 0 ? new SizeT((uint)value) : throw new ArgumentOutOfRangeException();
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/// <summary>Performs an implicit conversion from <see cref="System.UInt32"/> to <see cref="SizeT"/>.</summary>
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/// <param name="value">The value.</param>
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/// <returns>The result of the conversion.</returns>
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public static implicit operator SizeT(uint value) => new SizeT(value);
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/// <summary>Performs an implicit conversion from <see cref="System.Int64"/> to <see cref="SizeT"/>.</summary>
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/// <param name="value">The value.</param>
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/// <returns>The result of the conversion.</returns>
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public static implicit operator SizeT(long value) => value >= 0 ? new SizeT((ulong)value) : throw new ArgumentOutOfRangeException();
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/// <summary>Performs an implicit conversion from <see cref="System.UInt64"/> to <see cref="SizeT"/>.</summary>
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/// <param name="value">The value.</param>
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/// <returns>The result of the conversion.</returns>
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public static implicit operator SizeT(ulong value) => new SizeT(value);
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/// <summary>Performs an implicit conversion from <see cref="SizeT"/> to <see cref="System.Int32"/>.</summary>
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/// <param name="value">The value.</param>
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/// <returns>The result of the conversion.</returns>
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public static implicit operator int(SizeT value) => ((IConvertible)value).ToInt32(null);
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/// <summary>Performs an implicit conversion from <see cref="SizeT"/> to <see cref="System.UInt32"/>.</summary>
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/// <param name="value">The value.</param>
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/// <returns>The result of the conversion.</returns>
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public static implicit operator uint(SizeT value) => ((IConvertible)value).ToUInt32(null);
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/// <summary>Performs an implicit conversion from <see cref="SizeT"/> to <see cref="System.Int64"/>.</summary>
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/// <param name="value">The value.</param>
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/// <returns>The result of the conversion.</returns>
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public static implicit operator long(SizeT value) => ((IConvertible)value).ToInt64(null);
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/// <summary>Performs an implicit conversion from <see cref="SizeT"/> to <see cref="System.UInt64"/>.</summary>
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/// <param name="value">The value.</param>
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/// <returns>The result of the conversion.</returns>
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public static implicit operator ulong(SizeT value) => value.Value;
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/// <summary>Indicates whether two <see cref="SizeT"/> instances are not equal.</summary>
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/// <param name="s1">The first integral size to compare.</param>
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/// <param name="s2">The second integral size to compare.</param>
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/// <returns>
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/// <see langword="true"/> if the value of <paramref name="s1"/> is not equal to the value of <paramref name="s2"/>; otherwise, <see langword="false"/>.
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/// </returns>
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public static bool operator !=(SizeT s1, SizeT s2) => !s1.Equals(s2);
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/// <summary>Indicates whether a specified <see cref="SizeT"/> is less than another specified <see cref="SizeT"/>.</summary>
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/// <param name="s1">The first integral size to compare.</param>
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/// <param name="s2">The second integral size to compare.</param>
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/// <returns>
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/// <see langword="true"/> if the value of <paramref name="s1"/> is less than the value of <paramref name="s2"/>; otherwise, <see langword="false"/>.
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/// </returns>
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public static bool operator <(SizeT s1, SizeT s2) => (s1.CompareTo(s2) < 0) ? true : false;
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/// <summary>Indicates whether a specified <see cref="SizeT"/> is less than or equal to another specified <see cref="SizeT"/>.</summary>
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/// <param name="s1">The first integral size to compare.</param>
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/// <param name="s2">The second integral size to compare.</param>
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/// <returns>
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/// <see langword="true"/> if the value of <paramref name="s1"/> is less than or equal to the value of <paramref name="s2"/>;
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/// otherwise, <see langword="false"/>.
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/// </returns>
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public static bool operator <=(SizeT s1, SizeT s2) => (s1.CompareTo(s2) <= 0) ? true : false;
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/// <summary>Indicates whether two <see cref="SizeT"/> instances are equal.</summary>
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/// <param name="s1">The first integral size to compare.</param>
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/// <param name="s2">The second integral size to compare.</param>
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/// <returns>
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/// <see langword="true"/> if the value of <paramref name="s1"/> is equal to the value of <paramref name="s2"/>; otherwise, <see langword="false"/>.
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/// </returns>
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public static bool operator ==(SizeT s1, SizeT s2) => s1.Equals(s2);
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/// <summary>Indicates whether a specified <see cref="SizeT"/> is greater than another specified <see cref="SizeT"/>.</summary>
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/// <param name="s1">The first integral size to compare.</param>
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/// <param name="s2">The second integral size to compare.</param>
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/// <returns>
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/// <see langword="true"/> if the value of <paramref name="s1"/> is greater than the value of <paramref name="s2"/>; otherwise, <see langword="false"/>.
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/// </returns>
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public static bool operator >(SizeT s1, SizeT s2) => (s1.CompareTo(s2) > 0) ? true : false;
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/// <summary>Indicates whether a specified <see cref="SizeT"/> is greater than or equal to another specified <see cref="SizeT"/>.</summary>
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/// <param name="s1">The first integral size to compare.</param>
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/// <param name="s2">The second integral size to compare.</param>
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/// <returns>
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/// <see langword="true"/> if the value of <paramref name="s1"/> is greater than or equal to the value of <paramref name="s2"/>;
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/// otherwise, <see langword="false"/>.
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/// </returns>
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public static bool operator >=(SizeT s1, SizeT s2) => (s1.CompareTo(s2) >= 0) ? true : false;
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/// <inheritdoc/>
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public int CompareTo(SizeT other) => Value.CompareTo(other.Value);
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/// <inheritdoc/>
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public override bool Equals(object obj) => obj is SizeT s ? Equals(s) : Value.Equals(obj);
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/// <inheritdoc/>
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public bool Equals(SizeT other) => Value.Equals(other.Value);
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/// <inheritdoc/>
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public override int GetHashCode() => Value.GetHashCode();
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/// <inheritdoc/>
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public TypeCode GetTypeCode() => Value.GetTypeCode();
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/// <inheritdoc/>
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public override string ToString() => Value.ToString();
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/// <inheritdoc/>
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public string ToString(IFormatProvider provider) => Value.ToString(provider);
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/// <inheritdoc/>
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int IComparable.CompareTo(object obj) => Value.CompareTo(Convert.ChangeType(obj, typeof(ulong)));
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/// <inheritdoc/>
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bool IConvertible.ToBoolean(IFormatProvider provider) => ((IConvertible)Value).ToBoolean(provider);
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/// <inheritdoc/>
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byte IConvertible.ToByte(IFormatProvider provider)
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{
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var ul = Value;
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if (ul < (ulong)byte.MaxValue)
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return (byte)ul;
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if (ul == uint.MaxValue || ul == ulong.MaxValue)
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return byte.MaxValue;
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throw new OverflowException();
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}
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/// <inheritdoc/>
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char IConvertible.ToChar(IFormatProvider provider) => ((IConvertible)Value).ToChar(provider);
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/// <inheritdoc/>
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DateTime IConvertible.ToDateTime(IFormatProvider provider) => ((IConvertible)Value).ToDateTime(provider);
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/// <inheritdoc/>
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decimal IConvertible.ToDecimal(IFormatProvider provider)
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{
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var ul = Value;
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if (ul < decimal.MaxValue)
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return (decimal)ul;
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if (ul == uint.MaxValue || ul == ulong.MaxValue)
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return decimal.MaxValue;
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throw new OverflowException();
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}
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/// <inheritdoc/>
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double IConvertible.ToDouble(IFormatProvider provider)
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{
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var ul = Value;
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if (ul < double.MaxValue)
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return ul;
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if (ul == uint.MaxValue || ul == ulong.MaxValue)
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return double.MaxValue;
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throw new OverflowException();
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}
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/// <inheritdoc/>
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short IConvertible.ToInt16(IFormatProvider provider)
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{
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var ul = Value;
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if (ul < (ulong)short.MaxValue)
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return (short)ul;
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if (ul == uint.MaxValue || ul == ulong.MaxValue)
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return short.MaxValue;
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throw new OverflowException();
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}
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/// <inheritdoc/>
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int IConvertible.ToInt32(IFormatProvider provider)
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{
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var ul = Value;
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if (ul < int.MaxValue)
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return (int)ul;
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if (ul == uint.MaxValue || ul == ulong.MaxValue)
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return int.MaxValue;
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throw new OverflowException();
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}
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/// <inheritdoc/>
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long IConvertible.ToInt64(IFormatProvider provider)
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{
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var ul = Value;
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if (ul < long.MaxValue)
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return (long)ul;
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if (ul == uint.MaxValue || ul == ulong.MaxValue)
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return long.MaxValue;
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throw new OverflowException();
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}
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/// <inheritdoc/>
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sbyte IConvertible.ToSByte(IFormatProvider provider)
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{
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var ul = Value;
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if (ul < (ulong)sbyte.MaxValue)
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return (sbyte)ul;
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if (ul == uint.MaxValue || ul == ulong.MaxValue)
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return sbyte.MaxValue;
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throw new OverflowException();
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}
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/// <inheritdoc/>
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float IConvertible.ToSingle(IFormatProvider provider)
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{
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var ul = Value;
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if (ul < float.MaxValue)
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return ul;
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if (ul == uint.MaxValue || ul == ulong.MaxValue)
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return float.MaxValue;
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throw new OverflowException();
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}
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/// <inheritdoc/>
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object IConvertible.ToType(Type conversionType, IFormatProvider provider) => ((IConvertible)Value).ToType(conversionType, provider);
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/// <inheritdoc/>
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ushort IConvertible.ToUInt16(IFormatProvider provider)
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{
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var ul = Value;
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if (ul < (ulong)ushort.MaxValue)
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return (ushort)ul;
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if (ul == uint.MaxValue || ul == ulong.MaxValue)
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return ushort.MaxValue;
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throw new OverflowException();
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}
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/// <inheritdoc/>
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uint IConvertible.ToUInt32(IFormatProvider provider)
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{
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var ul = Value;
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if (ul < uint.MaxValue)
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return (uint)ul;
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if (ul == uint.MaxValue || ul == ulong.MaxValue)
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return uint.MaxValue;
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throw new OverflowException();
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}
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/// <inheritdoc/>
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ulong IConvertible.ToUInt64(IFormatProvider provider) => Value;
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internal class SizeTTypeConverter : UInt64Converter
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{
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public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
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{
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if (!(value is SizeT sz)) throw new ArgumentException();
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return base.ConvertTo(context, culture, sz.Value, destinationType);
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}
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public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) =>
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new SizeT((ulong)base.ConvertFrom(context, culture, value));
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}
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}
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} |