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
|
//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
#define BINARY
namespace System.ServiceModel
{
using System.Collections.Generic;
using System.Runtime;
using System.ServiceModel.Channels;
using System.Xml;
class XmlBuffer
{
List<Section> sections;
byte[] buffer;
int offset;
BufferedOutputStream stream;
BufferState bufferState;
XmlDictionaryWriter writer;
XmlDictionaryReaderQuotas quotas;
enum BufferState
{
Created,
Writing,
Reading,
}
struct Section
{
int offset;
int size;
XmlDictionaryReaderQuotas quotas;
public Section(int offset, int size, XmlDictionaryReaderQuotas quotas)
{
this.offset = offset;
this.size = size;
this.quotas = quotas;
}
public int Offset
{
get { return this.offset; }
}
public int Size
{
get { return this.size; }
}
public XmlDictionaryReaderQuotas Quotas
{
get { return this.quotas; }
}
}
public XmlBuffer(int maxBufferSize)
{
if (maxBufferSize < 0)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("maxBufferSize", maxBufferSize,
SR.GetString(SR.ValueMustBeNonNegative)));
int initialBufferSize = Math.Min(512, maxBufferSize);
stream = new BufferManagerOutputStream(SR.XmlBufferQuotaExceeded, initialBufferSize, maxBufferSize,
BufferManager.CreateBufferManager(0, int.MaxValue));
sections = new List<Section>(1);
}
public int BufferSize
{
get
{
Fx.Assert(bufferState == BufferState.Reading, "Buffer size shuold only be retrieved during Reading state");
return buffer.Length;
}
}
public int SectionCount
{
get { return this.sections.Count; }
}
public XmlDictionaryWriter OpenSection(XmlDictionaryReaderQuotas quotas)
{
if (bufferState != BufferState.Created)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(CreateInvalidStateException());
bufferState = BufferState.Writing;
this.quotas = new XmlDictionaryReaderQuotas();
quotas.CopyTo(this.quotas);
if (this.writer == null)
{
this.writer = XmlDictionaryWriter.CreateBinaryWriter(stream, XD.Dictionary, null, true);
}
else
{
((IXmlBinaryWriterInitializer)this.writer).SetOutput(stream, XD.Dictionary, null, true);
}
return this.writer;
}
public void CloseSection()
{
if (bufferState != BufferState.Writing)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(CreateInvalidStateException());
this.writer.Close();
bufferState = BufferState.Created;
int size = (int)stream.Length - offset;
sections.Add(new Section(offset, size, this.quotas));
offset += size;
}
public void Close()
{
if (bufferState != BufferState.Created)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(CreateInvalidStateException());
bufferState = BufferState.Reading;
int bufferSize;
buffer = stream.ToArray(out bufferSize);
writer = null;
stream = null;
}
Exception CreateInvalidStateException()
{
return new InvalidOperationException(SR.GetString(SR.XmlBufferInInvalidState));
}
public XmlDictionaryReader GetReader(int sectionIndex)
{
if (bufferState != BufferState.Reading)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(CreateInvalidStateException());
Section section = sections[sectionIndex];
XmlDictionaryReader reader = XmlDictionaryReader.CreateBinaryReader(buffer, section.Offset, section.Size, XD.Dictionary, section.Quotas, null, null);
reader.MoveToContent();
return reader;
}
public void WriteTo(int sectionIndex, XmlWriter writer)
{
if (bufferState != BufferState.Reading)
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(CreateInvalidStateException());
XmlDictionaryReader reader = GetReader(sectionIndex);
try
{
writer.WriteNode(reader, false);
}
finally
{
reader.Close();
}
}
}
}
|
