1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
|
//------------------------------------------------------------------------------
// <copyright file="TimeSpanStorage.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">Microsoft</owner>
// <owner current="true" primary="false">Microsoft</owner>
// <owner current="false" primary="false">Microsoft</owner>
//------------------------------------------------------------------------------
namespace System.Data.Common {
using System;
using System.Xml;
using System.Data.SqlTypes;
using System.Collections;
internal sealed class TimeSpanStorage : DataStorage {
private static readonly TimeSpan defaultValue = TimeSpan.Zero;
private TimeSpan[] values;
public TimeSpanStorage(DataColumn column)
: base(column, typeof(TimeSpan), defaultValue, StorageType.TimeSpan) {
}
override public Object Aggregate(int[] records, AggregateType kind) {
bool hasData = false;
try {
switch (kind) {
case AggregateType.Min:
TimeSpan min = TimeSpan.MaxValue;
for (int i = 0; i < records.Length; i++) {
int record = records[i];
if (IsNull(record))
continue;
min=(TimeSpan.Compare(values[record],min) < 0) ? values[record] : min;
hasData = true;
}
if (hasData) {
return min;
}
return NullValue;
case AggregateType.Max:
TimeSpan max = TimeSpan.MinValue;
for (int i = 0; i < records.Length; i++) {
int record = records[i];
if (IsNull(record))
continue;
max=(TimeSpan.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:
return base.Aggregate(records, kind);
case AggregateType.Sum: {
decimal sum = 0;
foreach (int record in records) {
if (IsNull(record))
continue;
sum += values[record].Ticks;
hasData = true;
}
if (hasData) {
return TimeSpan.FromTicks((long)Math.Round(sum));
}
return null;
}
case AggregateType.Mean: {
decimal meanSum = 0;
int meanCount = 0;
foreach (int record in records) {
if (IsNull(record))
continue;
meanSum += values[record].Ticks;
meanCount++;
}
if (meanCount > 0) {
return TimeSpan.FromTicks((long)Math.Round(meanSum / meanCount));
}
return null;
}
case AggregateType.StDev: {
int count = 0;
decimal meanSum = 0;
foreach (int record in records) {
if (IsNull(record))
continue;
meanSum += values[record].Ticks;
count++;
}
if (count > 1) {
double varSum = 0;
decimal mean=meanSum/count;
foreach (int record in records) {
if (IsNull(record))
continue;
double x = (double)(values[record].Ticks - mean);
varSum += x * x;
}
ulong stDev = (ulong)Math.Round(Math.Sqrt(varSum / (count - 1)));
if (stDev > long.MaxValue) {
stDev = long.MaxValue;
}
return TimeSpan.FromTicks((long)stDev);
}
return null;
}
}
}
catch (OverflowException) {
throw ExprException.Overflow(typeof(TimeSpan));
}
throw ExceptionBuilder.AggregateException(kind, DataType);
}
override public int Compare(int recordNo1, int recordNo2) {
TimeSpan valueNo1 = values[recordNo1];
TimeSpan valueNo2 = values[recordNo2];
if (valueNo1 == defaultValue || valueNo2 == defaultValue) {
int bitCheck = CompareBits(recordNo1, recordNo2);
if (0 != bitCheck)
return bitCheck;
}
return TimeSpan.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) {
if (IsNull(recordNo)) {
return 0;
}
return 1;
}
TimeSpan valueNo1 = values[recordNo];
if ((defaultValue == valueNo1) && IsNull(recordNo)) {
return -1;
}
return valueNo1.CompareTo((TimeSpan)value);
}
private static TimeSpan ConvertToTimeSpan(object value) {
// Webdata 94686: Do not change this checks
Type typeofValue= value.GetType();
if (typeofValue == typeof(string)) {
return TimeSpan.Parse((string)value);
}
else if (typeofValue == typeof(Int32)) {
return new TimeSpan((Int64)((Int32)value));
}
else if (typeofValue == typeof(Int64)) {
return new TimeSpan((Int64)value);
}
else {
return (TimeSpan) value;
}
}
public override object ConvertValue(object value) {
if (NullValue != value) {
if (null != value) {
value = ConvertToTimeSpan(value);
}
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) {
TimeSpan 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] = ConvertToTimeSpan(value);
SetNullBit(record, false);
}
}
override public void SetCapacity(int capacity) {
TimeSpan[] newValues = new TimeSpan[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.ToTimeSpan(s);
}
override public string ConvertObjectToXml(object value) {
return XmlConvert.ToString((TimeSpan)value);
}
override protected object GetEmptyStorage(int recordCount) {
return new TimeSpan[recordCount];
}
override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) {
TimeSpan[] typedStore = (TimeSpan[]) store;
typedStore[storeIndex] = values[record];
nullbits.Set(storeIndex, IsNull(record));
}
override protected void SetStorage(object store, BitArray nullbits) {
values = (TimeSpan[]) store;
SetNullStorage(nullbits);
}
}
}
|
