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
|
// BufferedTextReader.cs
//
// Author:
// Mike Krüger <mkrueger@novell.com>
//
// Copyright (c) 2008 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
using System;
using System.IO;
namespace Mono.TextEditor
{
/// <summary>
/// Wraps the IBuffer interface to a System.IO.TextReader model.
/// </summary>
class BufferedTextReader : System.IO.TextReader
{
int position = 0;
IBuffer buffer;
public BufferedTextReader (IBuffer buffer)
{
this.buffer = buffer;
}
protected override void Dispose (bool disposing)
{
if (disposing)
buffer = null;
}
public override void Close ()
{
Dispose ();
}
public override int Peek ()
{
if (position < 0 || position >= buffer.TextLength)
return -1;
return buffer.GetCharAt (position);
}
public override int Read ()
{
if (position < 0 || position >= buffer.TextLength)
return -1;
return buffer.GetCharAt (position++);
}
public override int Read (char[] buffer, int index, int count)
{
if (buffer == null)
throw new ArgumentNullException ();
int lastOffset = System.Math.Min (this.buffer.TextLength, position + count);
int length = lastOffset - position;
if (length <= 0)
return 0;
string text = this.buffer.GetTextAt (position, length);
text.CopyTo (0, buffer, index, length);
position += length;
return length;
}
public override string ReadToEnd ()
{
if (position < 0 || position >= buffer.TextLength)
return "";
string result = this.buffer.GetTextAt (position, buffer.TextLength - position);
position = buffer.TextLength;
return result;
}
}
}
|