86 lines
2.1 KiB
C#
86 lines
2.1 KiB
C#
using System;
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using System.IO;
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namespace iTextSharp.text.rtf.parser {
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public class PushbackStream : Stream {
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private int buf = -1;
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private readonly Stream s;
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public PushbackStream(Stream s) {
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this.s = s;
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}
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public override bool CanRead
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{
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get { return s.CanRead; }
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}
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public override bool CanSeek
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{
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get { return s.CanSeek; }
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}
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public override bool CanWrite
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{
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get { return s.CanWrite; }
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}
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public override long Length
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{
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get { return s.Length; }
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}
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public override long Position
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{
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get { return s.Position; }
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set { s.Position = value; }
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}
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public override void Close()
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{
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s.Close();
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}
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public override void Flush()
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{
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s.Flush();
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}
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public override long Seek(long offset, SeekOrigin origin)
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{
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return s.Seek(offset, origin);
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}
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public override void SetLength(long value)
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{
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s.SetLength(value);
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}
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public override void Write(byte[] buffer, int offset, int count)
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{
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s.Write(buffer, offset, count);
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}
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public override void WriteByte(byte value)
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{
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s.WriteByte(value);
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}
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public override int ReadByte() {
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if (buf != -1) {
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int tmp = buf;
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buf = -1;
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return tmp;
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}
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return s.ReadByte();
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}
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public override int Read(byte[] buffer, int offset, int count) {
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if (buf != -1 && count > 0) {
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// TODO Can this case be made more efficient?
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buffer[offset] = (byte) buf;
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buf = -1;
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return 1;
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}
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return s.Read(buffer, offset, count);
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}
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public virtual void Unread(int b) {
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if (buf != -1)
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throw new InvalidOperationException("Can only push back one byte");
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buf = b & 0xFF;
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}
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}
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} |