Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data/System/Data/Common/DateTimeStorage.cs

@@ -0,0 +1,244 @@
+//------------------------------------------------------------------------------
+// <copyright file="DateTimeStorage.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+// <owner current="true" primary="true">[....]</owner>
+// <owner current="true" primary="false">[....]</owner>
+// <owner current="false" primary="false">[....]</owner>
+//------------------------------------------------------------------------------
+
+namespace System.Data.Common {
+    using System;
+    using System.Xml;
+    using System.Data.SqlTypes;
+    using System.Collections;
+
+    internal sealed class DateTimeStorage : DataStorage {
+
+        private static readonly DateTime defaultValue = DateTime.MinValue;
+
+        private DateTime[] values;
+
+        internal DateTimeStorage(DataColumn column)
+        : base(column, typeof(DateTime), defaultValue, StorageType.DateTime) {
+        }
+
+        override public Object Aggregate(int[] records, AggregateType kind) {
+            bool hasData = false;
+            try {
+                switch (kind) {
+                    case AggregateType.Min:
+                        DateTime min = DateTime.MaxValue;
+                        for (int i = 0; i < records.Length; i++) {
+                            int record = records[i];
+                            if (HasValue(record)) {
+                                min=(DateTime.Compare(values[record],min) < 0) ? values[record] : min;
+                                hasData = true;
+                            }
+                        }
+                        if (hasData) {
+                            return min;
+                        }
+                        return NullValue;
+
+                    case AggregateType.Max:
+                        DateTime max = DateTime.MinValue;
+                        for (int i = 0; i < records.Length; i++) {
+                            int record = records[i];
+                            if (HasValue(record)) {
+                                max=(DateTime.Compare(values[record],max) >= 0) ? values[record] : max;
+                                hasData = true;
+                            }
+                        }
+                        if (hasData) {
+                            return max;
+                        }
+                        return NullValue;
+
+                    case AggregateType.First:
+                        if (records.Length > 0) {
+                            return values[records[0]];
+                        }
+                        return null;
+
+                    case AggregateType.Count:
+                        int count = 0;
+                        for (int i = 0; i < records.Length; i++) {
+                            if (HasValue(records[i])) {
+                                count++;
+                            }
+                        }
+                        return count;
+                }
+            }
+            catch (OverflowException) {
+                throw ExprException.Overflow(typeof(DateTime));
+            }
+            throw ExceptionBuilder.AggregateException(kind, DataType);
+        }
+
+        override public int Compare(int recordNo1, int recordNo2) {
+            DateTime valueNo1 = values[recordNo1];
+            DateTime valueNo2 = values[recordNo2];
+            
+            if (valueNo1 == defaultValue || valueNo2 == defaultValue) {
+                int bitCheck = CompareBits(recordNo1, recordNo2);
+                if (0 != bitCheck) {
+                    return bitCheck;
+                }
+            }
+            return DateTime.Compare(valueNo1, 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);
+            }
+
+            DateTime valueNo1 = values[recordNo];
+            if ((defaultValue == valueNo1) && !HasValue(recordNo)) {
+                return -1;
+            }
+            return DateTime.Compare(valueNo1, (DateTime)value);
+        }
+
+        public override object ConvertValue(object value) {
+            if (NullValue != value) {
+                if (null != value) {
+                    value = ((IConvertible)value).ToDateTime(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) {
+            // SQLBU 408233: two equal DateTime with different .Kind are equal
+            DateTime value = values[record];
+            if ((value != defaultValue) || HasValue(record)) {
+                return value;
+            }
+            return NullValue;
+        }
+
+        override public void Set(int record, Object value) {
+            System.Diagnostics.Debug.Assert(null != value, "null value");
+            if (NullValue == value) {
+                values[record] = defaultValue;
+                SetNullBit(record, true);
+            }
+            else {
+                DateTime retVal;
+                DateTime tmpValue = ((IConvertible)value).ToDateTime(FormatProvider);
+                switch (DateTimeMode) {
+                    case DataSetDateTime.Utc:
+                        if (tmpValue.Kind == DateTimeKind.Utc) {
+                            retVal = tmpValue;
+                        }
+                        else if (tmpValue.Kind == DateTimeKind.Local) {
+                            retVal = tmpValue.ToUniversalTime();
+                        }
+                        else {
+                            retVal = DateTime.SpecifyKind(tmpValue, DateTimeKind.Utc);
+                        }
+                        break;
+                    case DataSetDateTime.Local:
+                        if (tmpValue.Kind == DateTimeKind.Local) {
+                            retVal = tmpValue;
+                        }
+                        else if (tmpValue.Kind == DateTimeKind.Utc) {
+                            retVal = tmpValue.ToLocalTime();
+                        }
+                        else {
+                            retVal =  DateTime.SpecifyKind(tmpValue, DateTimeKind.Local);
+                        }
+                        break;
+                    case DataSetDateTime.Unspecified:
+                    case DataSetDateTime.UnspecifiedLocal:
+                        retVal = DateTime.SpecifyKind(tmpValue, DateTimeKind.Unspecified); 
+                        break;
+                    default:
+                        throw ExceptionBuilder.InvalidDateTimeMode(DateTimeMode);
+                }
+                values[record] = retVal;
+                SetNullBit(record, false);
+            }
+        }
+
+        override public void SetCapacity(int capacity) {
+            DateTime[] newValues = new DateTime[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) {
+            object retValue;
+            if (DateTimeMode == DataSetDateTime.UnspecifiedLocal) {
+                retValue = XmlConvert.ToDateTime(s, XmlDateTimeSerializationMode.Unspecified);
+            }
+            else {
+                retValue = XmlConvert.ToDateTime(s, XmlDateTimeSerializationMode.RoundtripKind);
+            }
+            return retValue;
+        }
+
+        override public string ConvertObjectToXml(object value) {
+            string retValue;
+            if (DateTimeMode == DataSetDateTime.UnspecifiedLocal) {
+                retValue = XmlConvert.ToString((DateTime)value, XmlDateTimeSerializationMode.Local);
+            }
+            else {
+                retValue = XmlConvert.ToString((DateTime)value, XmlDateTimeSerializationMode.RoundtripKind);
+            }
+            return retValue;
+        }
+
+        override protected object GetEmptyStorage(int recordCount) {
+            return new DateTime[recordCount];
+        }
+
+        override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) {
+            DateTime[] typedStore = (DateTime[]) store;
+            bool isnull = !HasValue(record);
+            if (isnull || ( 0 == (DateTimeMode & DataSetDateTime.Local))) {
+                typedStore[storeIndex] = values[record]; // already universal time
+            }
+            else {
+                typedStore[storeIndex] = values[record].ToUniversalTime();
+            }
+            nullbits.Set(storeIndex, isnull);
+        }
+
+        override protected void SetStorage(object store, BitArray nullbits) {
+            values = (DateTime[]) store; 
+            SetNullStorage(nullbits);
+            if (DateTimeMode == DataSetDateTime.UnspecifiedLocal) {
+                for (int i = 0; i < values.Length; i++) {
+                    if (HasValue(i)) {
+                        values[i] = DateTime.SpecifyKind(values[i].ToLocalTime(), DateTimeKind.Unspecified); //Strip the kind for UnspecifiedLocal.
+                    }
+                }                
+            }
+            else if (DateTimeMode == DataSetDateTime.Local) {
+                for (int i = 0; i < values.Length; i++) {
+                    if (HasValue(i)) {
+                        values[i] = values[i].ToLocalTime();
+                    }
+                }                
+            }
+        }
+    }
+}