307 lines
9.9 KiB
C#
307 lines
9.9 KiB
C#
using System;
|
|
using System.IO;
|
|
using System.Collections;
|
|
/*
|
|
* Copyright 2007 Thomas Bickel
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version 1.1
|
|
* (the "License"); you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the License.
|
|
*
|
|
* The Original Code is 'iText, a free JAVA-PDF library'.
|
|
*
|
|
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
|
|
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
|
|
* All Rights Reserved.
|
|
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
|
|
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
|
|
*
|
|
* Contributor(s): all the names of the contributors are added in the source code
|
|
* where applicable.
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of the
|
|
* LGPL license (the ?GNU LIBRARY GENERAL PUBLIC LICENSE?), in which case the
|
|
* provisions of LGPL are applicable instead of those above. If you wish to
|
|
* allow use of your version of this file only under the terms of the LGPL
|
|
* License and not to allow others to use your version of this file under
|
|
* the MPL, indicate your decision by deleting the provisions above and
|
|
* replace them with the notice and other provisions required by the LGPL.
|
|
* If you do not delete the provisions above, a recipient may use your version
|
|
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
|
|
*
|
|
* This library is free software; you can redistribute it and/or modify it
|
|
* under the terms of the MPL as stated above or under the terms of the GNU
|
|
* Library General Public License as published by the Free Software Foundation;
|
|
* either version 2 of the License, or any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
|
|
* details.
|
|
*
|
|
* If you didn't download this code from the following link, you should check if
|
|
* you aren't using an obsolete version:
|
|
* http://www.lowagie.com/iText/
|
|
*/
|
|
|
|
namespace iTextSharp.text.rtf.document.output {
|
|
|
|
public class RtfByteArrayBuffer : Stream {
|
|
private ArrayList arrays = new ArrayList();
|
|
private byte[] buffer;
|
|
private int pos = 0;
|
|
private int size = 0;
|
|
|
|
public RtfByteArrayBuffer() : this(256) {
|
|
}
|
|
|
|
/**
|
|
* Creates a new buffer with the given initial size.
|
|
*
|
|
* @param bufferSize desired initial size in bytes
|
|
*/
|
|
public RtfByteArrayBuffer(int bufferSize) {
|
|
if ((bufferSize <= 0) || (bufferSize > 1<<30)) throw(new ArgumentException("bufferSize "+bufferSize));
|
|
|
|
int n = 1<<5;
|
|
while(n < bufferSize) {
|
|
n <<= 1;
|
|
}
|
|
buffer = new byte[n];
|
|
}
|
|
|
|
public override bool CanRead {
|
|
get {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public override bool CanSeek {
|
|
get {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public override bool CanWrite {
|
|
get {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
public override long Length {
|
|
get {
|
|
throw new NotSupportedException();
|
|
}
|
|
}
|
|
|
|
public override long Position {
|
|
get {
|
|
throw new NotSupportedException();
|
|
}
|
|
set {
|
|
throw new NotSupportedException();
|
|
}
|
|
}
|
|
|
|
public override void Close() {
|
|
}
|
|
|
|
public override void Flush() {
|
|
}
|
|
|
|
public override int Read(byte[] buffer, int offset, int count) {
|
|
throw new NotSupportedException();
|
|
}
|
|
|
|
public override long Seek(long offset, SeekOrigin origin) {
|
|
throw new NotSupportedException();
|
|
}
|
|
|
|
public override void SetLength(long value) {
|
|
throw new NotSupportedException();
|
|
}
|
|
|
|
public override void Write(byte[] src, int off, int len) {
|
|
if(src == null) throw(new ArgumentNullException());
|
|
if((off < 0) || (off > src.Length) || (len < 0) || ((off + len) > src.Length) || ((off + len) < 0)) throw new IndexOutOfRangeException();
|
|
|
|
WriteLoop(src, off, len);
|
|
}
|
|
|
|
private void WriteLoop(byte[] src, int off, int len) {
|
|
while(len > 0) {
|
|
int room = buffer.Length - pos;
|
|
int n = len > room ? room : len;
|
|
System.Array.Copy(src, off, buffer, pos, n);
|
|
len -= n;
|
|
off += n;
|
|
pos += n;
|
|
size += n;
|
|
if(pos == buffer.Length) FlushBuffer(len);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes all bytes available in the given inputstream to this buffer.
|
|
*
|
|
* @param in
|
|
* @return number of bytes written
|
|
* @throws IOException
|
|
*/
|
|
public long Write(Stream inp) {
|
|
if (inp == null) throw(new ArgumentNullException());
|
|
long sizeStart = size;
|
|
while (true) {
|
|
int n = inp.Read(buffer, pos, buffer.Length - pos);
|
|
if (n <= 0) break;
|
|
pos += n;
|
|
size += n;
|
|
if(pos == buffer.Length) FlushBuffer();
|
|
}
|
|
return(size - sizeStart);
|
|
}
|
|
|
|
/**
|
|
* Appends the given array to this buffer without copying (if possible).
|
|
*
|
|
* @param a
|
|
*/
|
|
public void Append(byte[] a) {
|
|
if(a == null) throw(new ArgumentNullException());
|
|
if(a.Length == 0) return;
|
|
|
|
if(a.Length <= 8) {
|
|
Write(a, 0, a.Length);
|
|
} else if((a.Length <= 16) && (pos > 0) && ((buffer.Length - pos) > a.Length)) {
|
|
Write(a, 0, a.Length);
|
|
} else {
|
|
FlushBuffer();
|
|
arrays.Add(a);
|
|
size += a.Length;
|
|
}
|
|
}
|
|
/**
|
|
* Appends all arrays to this buffer without copying (if possible).
|
|
*
|
|
* @param a
|
|
*/
|
|
public void Append(byte[][] a) {
|
|
if(a == null) throw(new ArgumentNullException());
|
|
|
|
for(int k = 0; k < a.Length; k++) {
|
|
Append(a[k]);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the internal list of byte array buffers without copying the buffer contents.
|
|
*
|
|
* @return an byte aray of buffers
|
|
*/
|
|
public byte[][] ToArrayArray()
|
|
{
|
|
FlushBuffer();
|
|
byte[][] a = new byte[arrays.Count][];
|
|
arrays.CopyTo(a);
|
|
return a;
|
|
}
|
|
|
|
/**
|
|
* Allocates a new array and copies all data that has been written to this buffer to the newly allocated array.
|
|
*
|
|
* @return a new byte array
|
|
*/
|
|
public byte[] ToArray()
|
|
{
|
|
byte[] r = new byte[size];
|
|
int off = 0;
|
|
int n = arrays.Count;
|
|
for(int k = 0; k < n; k++) {
|
|
byte[] src = (byte[])arrays[k];
|
|
System.Array.Copy(src, 0, r, off, src.Length);
|
|
off += src.Length;
|
|
}
|
|
if(pos > 0) System.Array.Copy(buffer, 0, r, off, pos);
|
|
return(r);
|
|
}
|
|
|
|
/**
|
|
* Writes all data that has been written to this buffer to the given output stream.
|
|
*
|
|
* @param out
|
|
* @throws IOException
|
|
*/
|
|
public void WriteTo(Stream outp) {
|
|
if(outp == null) throw(new ArgumentNullException());
|
|
|
|
int n = arrays.Count;
|
|
for(int k = 0; k < n; k++) {
|
|
byte[] src = (byte[])arrays[k];
|
|
outp.Write(src, 0, src.Length);
|
|
}
|
|
if(pos > 0) outp.Write(buffer, 0, pos);
|
|
}
|
|
|
|
public override void WriteByte(byte value) {
|
|
buffer[pos] = value;
|
|
size++;
|
|
if(++pos == buffer.Length) FlushBuffer();
|
|
}
|
|
|
|
public override string ToString() {
|
|
return("RtfByteArrayBuffer: size="+Size()+" #arrays="+arrays.Count+" pos="+pos);
|
|
}
|
|
|
|
/**
|
|
* Resets this buffer.
|
|
*/
|
|
public void Reset() {
|
|
arrays.Clear();
|
|
pos = 0;
|
|
size = 0;
|
|
}
|
|
|
|
/**
|
|
* Returns the number of bytes that have been written to this buffer so far.
|
|
*
|
|
* @return number of bytes written to this buffer
|
|
*/
|
|
public long Size() {
|
|
return(size);
|
|
}
|
|
|
|
private void FlushBuffer() {
|
|
FlushBuffer(1);
|
|
}
|
|
|
|
private void FlushBuffer(int reqSize) {
|
|
if(reqSize < 0) throw(new ArgumentException());
|
|
|
|
if(pos == 0) return;
|
|
|
|
if(pos == buffer.Length) {
|
|
//add old buffer, alloc new (possibly larger) buffer
|
|
arrays.Add(buffer);
|
|
int newSize = buffer.Length;
|
|
buffer = null;
|
|
int MAX = Math.Max(1, size>>24) << 16;
|
|
while(newSize < MAX) {
|
|
newSize <<= 1;
|
|
if(newSize >= reqSize) break;
|
|
}
|
|
buffer = new byte[newSize];
|
|
} else {
|
|
//copy buffer contents to newly allocated buffer
|
|
byte[] c = new byte[pos];
|
|
System.Array.Copy(buffer, 0, c, 0, pos);
|
|
arrays.Add(c);
|
|
}
|
|
pos = 0;
|
|
}
|
|
}
|
|
}
|