mirror of https://github.com/dahall/Vanara.git
184 lines
8.1 KiB
C#
184 lines
8.1 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
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{
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/// <summary>Managed instance of the OLE DECIMAL type.</summary>
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[StructLayout(LayoutKind.Sequential), Serializable]
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[TypeConverter(typeof(DECIMALTypeConverter))]
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public struct DECIMAL : IEquatable<DECIMAL>, IComparable<DECIMAL>, IEquatable<decimal>, IComparable<decimal>, IConvertible, IComparable
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{
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private ushort wReserved;
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private byte scale;
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private byte sign;
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private uint Hi32;
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private uint Lo32;
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private uint Mid32;
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/// <summary>Initializes a new instance of the <see cref="DECIMAL"/> struct.</summary>
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/// <param name="value">The value.</param>
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public DECIMAL(decimal value)
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{
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wReserved = 0;
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var bits = decimal.GetBits(value);
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Lo32 = unchecked((uint)bits[0]);
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Mid32 = unchecked((uint)bits[1]);
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Hi32 = unchecked((uint)bits[2]);
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sign = value < 0m ? (byte)0x80 : (byte)0;
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scale = (byte)((unchecked((uint)bits[3]) & 0x00FF0000) >> 16);
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}
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/// <summary>Gets the value.</summary>
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/// <value>The value.</value>
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public decimal Value => new decimal(unchecked((int)Lo32), unchecked((int)Mid32), unchecked((int)Hi32), sign == 0x80, scale);
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/// <summary>Performs an implicit conversion from <see cref="System.Byte"/> to <see cref="DECIMAL"/>.</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 DECIMAL(decimal value) => new DECIMAL(value);
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/// <summary>Performs an explicit conversion from <see cref="DECIMAL"/> to <see cref="System.Byte"/>.</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 explicit operator decimal(DECIMAL value) => value.Value;
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/// <summary>Indicates whether two <see cref="DECIMAL"/> 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 !=(DECIMAL s1, DECIMAL s2) => !s1.Equals(s2);
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/// <summary>Indicates whether a specified <see cref="DECIMAL"/> is less than another specified <see cref="DECIMAL"/>.</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 <(DECIMAL s1, DECIMAL s2) => s1.CompareTo(s2) < 0;
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/// <summary>Indicates whether a specified <see cref="DECIMAL"/> is less than or equal to another specified <see cref="DECIMAL"/>.</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 <=(DECIMAL s1, DECIMAL s2) => s1.CompareTo(s2) <= 0;
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/// <summary>Indicates whether two <see cref="DECIMAL"/> 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 ==(DECIMAL s1, DECIMAL s2) => s1.Equals(s2);
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/// <summary>Indicates whether a specified <see cref="DECIMAL"/> is greater than another specified <see cref="DECIMAL"/>.</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 >(DECIMAL s1, DECIMAL s2) => s1.CompareTo(s2) > 0;
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/// <summary>Indicates whether a specified <see cref="DECIMAL"/> is greater than or equal to another specified <see cref="DECIMAL"/>.</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 >=(DECIMAL s1, DECIMAL s2) => s1.CompareTo(s2) >= 0;
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/// <inheritdoc/>
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public int CompareTo(DECIMAL other) => Value.CompareTo(other.Value);
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/// <inheritdoc/>
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public int CompareTo(decimal other) => Value.CompareTo(other);
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/// <inheritdoc/>
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public override bool Equals(object obj) => obj is DECIMAL s ? Equals(s) : (obj is decimal b ? Value.Equals(b) : Value.Equals(obj));
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/// <inheritdoc/>
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public bool Equals(DECIMAL other) => Value.Equals(other.Value);
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/// <inheritdoc/>
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public bool Equals(decimal other) => Value.Equals(other);
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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(decimal)));
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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) => ((IConvertible)Value).ToByte(provider);
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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) => ((IConvertible)Value).ToDecimal(provider);
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/// <inheritdoc/>
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double IConvertible.ToDouble(IFormatProvider provider) => ((IConvertible)Value).ToDouble(provider);
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/// <inheritdoc/>
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short IConvertible.ToInt16(IFormatProvider provider) => ((IConvertible)Value).ToInt16(provider);
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/// <inheritdoc/>
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int IConvertible.ToInt32(IFormatProvider provider) => ((IConvertible)Value).ToInt32(provider);
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/// <inheritdoc/>
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long IConvertible.ToInt64(IFormatProvider provider) => ((IConvertible)Value).ToInt64(provider);
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/// <inheritdoc/>
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sbyte IConvertible.ToSByte(IFormatProvider provider) => ((IConvertible)Value).ToSByte(provider);
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/// <inheritdoc/>
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float IConvertible.ToSingle(IFormatProvider provider) => ((IConvertible)Value).ToSingle(provider);
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/// <inheritdoc/>
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object IConvertible.ToType(Type conversionType, IFormatProvider provider) => ((IConvertible)Value).ToBoolean(provider);
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/// <inheritdoc/>
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ushort IConvertible.ToUInt16(IFormatProvider provider) => ((IConvertible)Value).ToUInt16(provider);
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/// <inheritdoc/>
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uint IConvertible.ToUInt32(IFormatProvider provider) => ((IConvertible)Value).ToUInt32(provider);
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/// <inheritdoc/>
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ulong IConvertible.ToUInt64(IFormatProvider provider) => ((IConvertible)Value).ToUInt64(provider);
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internal class DECIMALTypeConverter : DecimalConverter
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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 DECIMAL b)) throw new ArgumentException();
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return base.ConvertTo(context, culture, b.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 DECIMAL((decimal)base.ConvertFrom(context, culture, value));
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}
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}
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} |