Created
April 26, 2012 15:41
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Byte-array builder
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public class ByteArrayBuilder | |
{ | |
private byte[] _buffer; | |
public int Length { get; set; } | |
public ByteArrayBuilder() | |
{ | |
_buffer = new byte[4096]; | |
Length = 0; | |
} | |
public ByteArrayBuilder Append(byte b) | |
{ | |
if (GetUnusedBufferLength() == 0) | |
{ | |
_buffer = IncreaseCapacity(_buffer, _buffer.Length * 2); | |
} | |
_buffer[Length] = b; | |
Length++; | |
return this; | |
} | |
public ByteArrayBuilder Append(byte[] buffer) | |
{ | |
var unusedBufferLength = GetUnusedBufferLength(); | |
if (unusedBufferLength < buffer.Length) | |
{ | |
_buffer = IncreaseCapacity(_buffer, _buffer.Length + buffer.Length); | |
} | |
Array.Copy(buffer, 0, _buffer, Length, buffer.Length); | |
Length += buffer.Length; | |
return this; | |
} | |
public byte[] ToArray() | |
{ | |
var unusedBufferLength = GetUnusedBufferLength(); | |
if (unusedBufferLength == 0) | |
{ | |
return _buffer; | |
} | |
var result = new byte[Length]; | |
Array.Copy(_buffer, result, result.Length); | |
return result; | |
} | |
private int GetUnusedBufferLength() | |
{ | |
return _buffer.Length - Length; | |
} | |
private static byte[] IncreaseCapacity(byte[] buffer, int targetLength) | |
{ | |
var result = new byte[targetLength]; | |
Array.Copy(buffer, result, buffer.Length); | |
return result; | |
} | |
} |
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