Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

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

@@ -0,0 +1,176 @@
+//------------------------------------------------------------------------------
+// <copyright file="BooleanStorage.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 BooleanStorage : DataStorage {
+
+        private const Boolean defaultValue = false;
+
+        private Boolean[] values;
+
+        internal BooleanStorage(DataColumn column)
+        : base(column, typeof(Boolean), defaultValue, StorageType.Boolean) {
+        }
+
+        override public Object Aggregate(int[] records, AggregateType kind) {
+            bool hasData = false;
+            try {
+                switch (kind) {
+                    case AggregateType.Min:
+                        Boolean min = true;
+                        for (int i = 0; i < records.Length; i++) {
+                            int record = records[i];
+                            if (IsNull(record))
+                                continue;
+                            min=values[record] && min;
+                            hasData = true;
+                        }
+                        if (hasData) {
+                            return min;
+                        }
+                        return NullValue;
+
+                    case AggregateType.Max:
+                        Boolean max = false;
+                        for (int i = 0; i < records.Length; i++) {
+                            int record = records[i];
+                            if (IsNull(record))
+                                continue;
+                            max=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:
+                        return base.Aggregate(records, kind);
+
+                }
+            }
+            catch (OverflowException) {
+                throw ExprException.Overflow(typeof(Boolean));
+            }
+            throw ExceptionBuilder.AggregateException(kind, DataType);
+        }
+
+        override public int Compare(int recordNo1, int recordNo2) {
+            Boolean valueNo1 = values[recordNo1];
+            Boolean valueNo2 = values[recordNo2];
+
+            if (valueNo1 == defaultValue || valueNo2 == defaultValue) {
+                int bitCheck = CompareBits(recordNo1, recordNo2);
+                if (0 != bitCheck)
+                    return bitCheck;
+            }
+            return valueNo1.CompareTo(valueNo2);
+            //return ((valueNo1 == valueNo2) ? 0 : ((false == valueNo1) ? -1 : 1)); // similar to Boolean.CompareTo(Boolean)
+        }
+
+        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) {
+                if (IsNull(recordNo)) {
+                    return 0;
+                }
+                return 1;
+            }
+
+            Boolean valueNo1 = values[recordNo];
+            if ((defaultValue == valueNo1) && IsNull(recordNo)) {
+                return -1;
+            }
+            return valueNo1.CompareTo((Boolean)value);
+            //return ((valueNo1 == valueNo2) ? 0 : ((false == valueNo1) ? -1 : 1)); // similar to Boolean.CompareTo(Boolean)
+        }
+
+        public override object ConvertValue(object value) {
+            if (NullValue != value) {
+                if (null != value) {
+                    value = ((IConvertible)value).ToBoolean(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) {
+            Boolean value = values[record];
+            if (value != defaultValue) {
+                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] = defaultValue;
+                SetNullBit(record, true);
+            }
+            else {
+                values[record] = ((IConvertible)value).ToBoolean(FormatProvider);
+                SetNullBit(record, false);
+            }
+        }
+
+         override public void SetCapacity(int capacity) {
+            Boolean[] newValues = new Boolean[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 XmlConvert.ToBoolean(s);
+        }
+
+         override public string ConvertObjectToXml(object value) {
+            return XmlConvert.ToString((Boolean) value);
+        }
+
+        override protected object GetEmptyStorage(int recordCount) {
+            return new Boolean[recordCount];
+        }
+
+        override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) {
+            Boolean[] typedStore = (Boolean[]) store;
+            typedStore[storeIndex] = values[record];
+            nullbits.Set(storeIndex, IsNull(record));
+        }
+
+        override protected void SetStorage(object store, BitArray nullbits) {
+            values = (Boolean[]) store;
+            SetNullStorage(nullbits);
+        }
+    }
+}