Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Data / System / Data / Common / BigIntegerStorage.cs / 1305376 / BigIntegerStorage.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- namespace System.Data.Common { using System; using System.Xml; using System.Numerics; using System.Data.SqlTypes; using System.Collections; internal sealed class BigIntegerStorage : DataStorage { private BigInteger[] values; internal BigIntegerStorage(DataColumn column) : base(column, typeof(BigInteger), BigInteger.Zero) { } override public Object Aggregate(int[] records, AggregateType kind) { throw ExceptionBuilder.AggregateException(kind, DataType); } override public 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) { System.Diagnostics.Debug.Assert(0 <= recordNo, "Invalid record"); System.Diagnostics.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 implict 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(Int64)) { return (BigInteger)(Int64)value; } else if (value.GetType() == typeof(Int32)) { return (BigInteger)(Int32)value; } else if (value.GetType() == typeof(Int16)) { return (BigInteger)(Int16)value; } else if (value.GetType() == typeof(SByte)) { return (BigInteger)(SByte)value; } else if (value.GetType() == typeof(UInt64)) { return (BigInteger)(UInt64)value; } else if (value.GetType() == typeof(UInt32)) { return (BigInteger)(UInt32)value; } else if (value.GetType() == typeof(UInt16)) { return (BigInteger)(UInt16)value; } else if (value.GetType() == typeof(Byte)) { return (BigInteger)(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(Int16)) { return checked((Int16)value); } else if (type == typeof(Int32)) { return checked((Int32)value); } else if (type == typeof(Int64)) { return checked((Int64)value); } else if (type == typeof(Byte)) { return checked((Byte)value); } else if (type == typeof(UInt16)) { return checked((UInt16)value); } else if (type == typeof(UInt32)) { return checked((UInt32)value); } else if (type == typeof(UInt64)) { return checked((UInt64)value); } else if (type == typeof(Single)) { return checked((Single)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, this.FormatProvider); } else { value = NullValue; } } return value; } override public void Copy(int recordNo1, int recordNo2) { CopyBits(recordNo1, recordNo2); values[recordNo2] = values[recordNo1]; } override public Object Get(int record) { BigInteger value = values[record]; if (!value.IsZero) { return value; } return GetBits(record); } override public void Set(int record, Object value) { System.Diagnostics.Debug.Assert(null != value, "null value"); if (NullValue == value) { values[record] = BigInteger.Zero; SetNullBit(record, true); } else { values[record] = ConvertToBigInteger(value, this.FormatProvider); SetNullBit(record, false); } } override public void SetCapacity(int capacity) { BigInteger[] newValues = new BigInteger[capacity]; if (null != values) { Array.Copy(values, 0, newValues, 0, Math.Min(capacity, values.Length)); } values = newValues; base.SetCapacity(capacity); } override public object ConvertXmlToObject(string s) { return BigInteger.Parse(s, System.Globalization.CultureInfo.InvariantCulture); } override public string ConvertObjectToXml(object value) { return ((BigInteger)value).ToString("D", System.Globalization.CultureInfo.InvariantCulture); } override protected object GetEmptyStorage(int recordCount) { return new BigInteger[recordCount]; } override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) { BigInteger[] typedStore = (BigInteger[])store; typedStore[storeIndex] = values[record]; nullbits.Set(storeIndex, !HasValue(record)); } override protected void SetStorage(object store, BitArray nullbits) { values = (BigInteger[])store; SetNullStorage(nullbits); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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