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
|
#region License
// Copyright (c) 2007 James Newton-King
//
// 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.
#endregion
using System;
namespace Newtonsoft.Json.Utilities
{
/// <summary>
/// Builds a string. Unlike StringBuilder this class lets you reuse it's internal buffer.
/// </summary>
internal class StringBuffer
{
private char[] _buffer;
private int _position;
private static readonly char[] EmptyBuffer = new char[0];
public int Position
{
get { return _position; }
set { _position = value; }
}
public StringBuffer()
{
_buffer = EmptyBuffer;
}
public StringBuffer(int initalSize)
{
_buffer = new char[initalSize];
}
public void Append(char value)
{
// test if the buffer array is large enough to take the value
if (_position == _buffer.Length)
EnsureSize(1);
// set value and increment poisition
_buffer[_position++] = value;
}
public void Append(char[] buffer, int startIndex, int count)
{
if (_position + count >= _buffer.Length)
EnsureSize(count);
Array.Copy(buffer, startIndex, _buffer, _position, count);
_position += count;
}
public void Clear()
{
_buffer = EmptyBuffer;
_position = 0;
}
private void EnsureSize(int appendLength)
{
char[] newBuffer = new char[(_position + appendLength) * 2];
Array.Copy(_buffer, newBuffer, _position);
_buffer = newBuffer;
}
public override string ToString()
{
return ToString(0, _position);
}
public string ToString(int start, int length)
{
// TODO: validation
return new string(_buffer, start, length);
}
public char[] GetInternalBuffer()
{
return _buffer;
}
}
}
|
