|
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Collections;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.Numerics;
namespace System.Data.Common
{
internal sealed class BigIntegerStorage : DataStorage
{
private BigInteger[] _values = default!; // Late-initialized
internal BigIntegerStorage(DataColumn column) :
base(column, typeof(BigInteger), BigInteger.Zero, StorageType.BigInteger)
{
}
public override object Aggregate(int[] records, AggregateType kind)
{
throw ExceptionBuilder.AggregateException(kind, _dataType);
}
public override int Compare(int recordNo1, int recordNo2)
{
BigInteger valueNo1 = _values[recordNo1];
BigInteger valueNo2 = _values[recordNo2];
if (valueNo1.IsZero || valueNo2.IsZero)
{
int bitCheck = CompareBits(recordNo1, recordNo2);
if (0 != bitCheck)
{
return bitCheck;
}
}
return valueNo1.CompareTo(valueNo2);
}
public override int CompareValueTo(int recordNo, object? value)
{
Debug.Assert(0 <= recordNo, "Invalid record");
Debug.Assert(null != value, "null value");
if (_nullValue == value)
{
return (HasValue(recordNo) ? 1 : 0);
}
BigInteger valueNo1 = _values[recordNo];
if (valueNo1.IsZero && !HasValue(recordNo))
{
return -1;
}
return valueNo1.CompareTo((BigInteger)value);
}
// supported implicit casts
internal static BigInteger ConvertToBigInteger(object value, IFormatProvider formatProvider)
{
if (value.GetType() == typeof(BigInteger)) { return (BigInteger)value; }
else if (value.GetType() == typeof(string)) { return BigInteger.Parse((string)value, formatProvider); }
else if (value.GetType() == typeof(long)) { return (long)value; }
else if (value.GetType() == typeof(int)) { return (int)value; }
else if (value.GetType() == typeof(short)) { return (short)value; }
else if (value.GetType() == typeof(sbyte)) { return (sbyte)value; }
else if (value.GetType() == typeof(ulong)) { return (ulong)value; }
else if (value.GetType() == typeof(uint)) { return (uint)value; }
else if (value.GetType() == typeof(ushort)) { return (ushort)value; }
else if (value.GetType() == typeof(byte)) { return (byte)value; }
else { throw ExceptionBuilder.ConvertFailed(value.GetType(), typeof(System.Numerics.BigInteger)); }
}
internal static object ConvertFromBigInteger(BigInteger value, Type type, IFormatProvider formatProvider)
{
if (type == typeof(string)) { return value.ToString("D", formatProvider); }
else if (type == typeof(sbyte)) { return checked((sbyte)value); }
else if (type == typeof(short)) { return checked((short)value); }
else if (type == typeof(int)) { return checked((int)value); }
else if (type == typeof(long)) { return checked((long)value); }
else if (type == typeof(byte)) { return checked((byte)value); }
else if (type == typeof(ushort)) { return checked((ushort)value); }
else if (type == typeof(uint)) { return checked((uint)value); }
else if (type == typeof(ulong)) { return checked((ulong)value); }
else if (type == typeof(float)) { return checked((float)value); }
else if (type == typeof(double)) { return checked((double)value); }
else if (type == typeof(decimal)) { return checked((decimal)value); }
else if (type == typeof(System.Numerics.BigInteger)) { return value; }
else { throw ExceptionBuilder.ConvertFailed(typeof(System.Numerics.BigInteger), type); }
}
public override object ConvertValue(object? value)
{
if (_nullValue != value)
{
if (null != value)
{
value = ConvertToBigInteger(value, FormatProvider);
}
else
{
value = _nullValue;
}
}
return value;
}
public override void Copy(int recordNo1, int recordNo2)
{
CopyBits(recordNo1, recordNo2);
_values[recordNo2] = _values[recordNo1];
}
public override object Get(int record)
{
BigInteger value = _values[record];
if (!value.IsZero)
{
return value;
}
return GetBits(record);
}
public override void Set(int record, object value)
{
Debug.Assert(null != value, "null value");
if (_nullValue == value)
{
_values[record] = BigInteger.Zero;
SetNullBit(record, true);
}
else
{
_values[record] = ConvertToBigInteger(value, FormatProvider);
SetNullBit(record, false);
}
}
public override void SetCapacity(int capacity)
{
Array.Resize(ref _values, capacity);
base.SetCapacity(capacity);
}
[RequiresUnreferencedCode(DataSet.RequiresUnreferencedCodeMessage)]
[RequiresDynamicCode(DataSet.RequiresDynamicCodeMessage)]
public override object ConvertXmlToObject(string s)
{
return BigInteger.Parse(s, System.Globalization.CultureInfo.InvariantCulture);
}
[RequiresUnreferencedCode(DataSet.RequiresUnreferencedCodeMessage)]
[RequiresDynamicCode(DataSet.RequiresDynamicCodeMessage)]
public override string ConvertObjectToXml(object value)
{
return ((BigInteger)value).ToString("D", System.Globalization.CultureInfo.InvariantCulture);
}
protected override object GetEmptyStorage(int recordCount)
{
return new BigInteger[recordCount];
}
protected override void CopyValue(int record, object store, BitArray nullbits, int storeIndex)
{
BigInteger[] typedStore = (BigInteger[])store;
typedStore[storeIndex] = _values[record];
nullbits.Set(storeIndex, !HasValue(record));
}
protected override void SetStorage(object store, BitArray nullbits)
{
_values = (BigInteger[])store;
SetNullStorage(nullbits);
}
}
}
|