64 lines
1.4 KiB
C#
64 lines
1.4 KiB
C#
using System;
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namespace Org.BouncyCastle.Utilities.Encoders;
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public class BufferedDecoder
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{
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internal byte[] buffer;
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internal int bufOff;
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internal ITranslator translator;
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public BufferedDecoder(ITranslator translator, int bufferSize)
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{
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this.translator = translator;
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if (bufferSize % translator.GetEncodedBlockSize() != 0)
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{
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throw new ArgumentException("buffer size not multiple of input block size");
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}
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buffer = new byte[bufferSize];
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}
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public int ProcessByte(byte input, byte[] output, int outOff)
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{
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int result = 0;
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buffer[bufOff++] = input;
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if (bufOff == buffer.Length)
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{
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result = translator.Decode(buffer, 0, buffer.Length, output, outOff);
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bufOff = 0;
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}
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return result;
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}
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public int ProcessBytes(byte[] input, int inOff, int len, byte[] outBytes, int outOff)
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{
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if (len < 0)
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{
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throw new ArgumentException("Can't have a negative input length!");
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}
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int num = 0;
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int num2 = buffer.Length - bufOff;
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if (len > num2)
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{
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Array.Copy(input, inOff, buffer, bufOff, num2);
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num += translator.Decode(buffer, 0, buffer.Length, outBytes, outOff);
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bufOff = 0;
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len -= num2;
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inOff += num2;
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outOff += num;
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int num3 = len - len % buffer.Length;
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num += translator.Decode(input, inOff, num3, outBytes, outOff);
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len -= num3;
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inOff += num3;
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}
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if (len != 0)
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{
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Array.Copy(input, inOff, buffer, bufOff, len);
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bufOff += len;
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}
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return num;
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}
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}
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