373 lines
9.6 KiB
C#
373 lines
9.6 KiB
C#
//
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// System.IO.BinaryWriter
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//
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// Authors:
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// Matt Kimball (matt@kimball.net)
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// Marek Safar (marek.safar@gmail.com)
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//
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//
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// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
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// Copyright 2011 Xamarin Inc.
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Text;
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using System.Globalization;
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using Mono.Security;
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using System.Runtime.InteropServices;
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namespace System.IO {
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[Serializable]
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[ComVisible (true)]
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public class BinaryWriter : IDisposable {
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// Null is a BinaryWriter with no backing store.
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public static readonly BinaryWriter Null = new BinaryWriter ();
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protected Stream OutStream;
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private Encoding m_encoding;
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private byte [] buffer;
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byte [] stringBuffer;
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int maxCharsPerRound;
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bool disposed;
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protected BinaryWriter() : this (Stream.Null, Encoding.UTF8UnmarkedUnsafe)
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{
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}
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public BinaryWriter(Stream output) : this(output, Encoding.UTF8UnmarkedUnsafe)
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{
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}
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#if NET_4_5
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readonly bool leave_open;
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public BinaryWriter(Stream output, Encoding encoding)
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: this (output, encoding, false)
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{
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}
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public BinaryWriter(Stream output, Encoding encoding, bool leaveOpen)
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#else
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const bool leave_open = false;
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public BinaryWriter(Stream output, Encoding encoding)
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#endif
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{
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if (output == null)
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throw new ArgumentNullException("output");
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if (encoding == null)
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throw new ArgumentNullException("encoding");
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if (!output.CanWrite)
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throw new ArgumentException(Locale.GetText ("Stream does not support writing or already closed."));
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#if NET_4_5
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leave_open = leaveOpen;
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#endif
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OutStream = output;
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m_encoding = encoding;
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buffer = new byte [16];
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}
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public virtual Stream BaseStream {
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get {
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Flush ();
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return OutStream;
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}
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}
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public virtual void Close() {
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Dispose (true);
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}
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#if NET_4_0
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public void Dispose ()
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#else
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void IDisposable.Dispose()
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#endif
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{
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Dispose (true);
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}
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protected virtual void Dispose (bool disposing)
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{
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if (disposing && OutStream != null && !leave_open)
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OutStream.Close();
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buffer = null;
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m_encoding = null;
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disposed = true;
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}
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public virtual void Flush() {
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OutStream.Flush();
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}
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public virtual long Seek(int offset, SeekOrigin origin) {
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return OutStream.Seek(offset, origin);
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}
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public virtual void Write(bool value) {
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if (disposed)
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throw new ObjectDisposedException ("BinaryWriter", "Cannot write to a closed BinaryWriter");
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buffer [0] = (byte) (value ? 1 : 0);
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OutStream.Write(buffer, 0, 1);
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}
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public virtual void Write(byte value) {
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if (disposed)
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throw new ObjectDisposedException ("BinaryWriter", "Cannot write to a closed BinaryWriter");
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OutStream.WriteByte(value);
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}
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public virtual void Write(byte[] buffer) {
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if (disposed)
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throw new ObjectDisposedException ("BinaryWriter", "Cannot write to a closed BinaryWriter");
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if (buffer == null)
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throw new ArgumentNullException("buffer");
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OutStream.Write(buffer, 0, buffer.Length);
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}
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public virtual void Write(byte[] buffer, int index, int count) {
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if (disposed)
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throw new ObjectDisposedException ("BinaryWriter", "Cannot write to a closed BinaryWriter");
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if (buffer == null)
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throw new ArgumentNullException("buffer");
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OutStream.Write(buffer, index, count);
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}
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public virtual void Write(char ch) {
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if (disposed)
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throw new ObjectDisposedException ("BinaryWriter", "Cannot write to a closed BinaryWriter");
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char[] dec = new char[1];
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dec[0] = ch;
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byte[] enc = m_encoding.GetBytes(dec, 0, 1);
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OutStream.Write(enc, 0, enc.Length);
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}
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public virtual void Write(char[] chars) {
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if (disposed)
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throw new ObjectDisposedException ("BinaryWriter", "Cannot write to a closed BinaryWriter");
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if (chars == null)
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throw new ArgumentNullException("chars");
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byte[] enc = m_encoding.GetBytes(chars, 0, chars.Length);
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OutStream.Write(enc, 0, enc.Length);
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}
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public virtual void Write(char[] chars, int index, int count) {
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if (disposed)
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throw new ObjectDisposedException ("BinaryWriter", "Cannot write to a closed BinaryWriter");
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if (chars == null)
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throw new ArgumentNullException("chars");
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byte[] enc = m_encoding.GetBytes(chars, index, count);
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OutStream.Write(enc, 0, enc.Length);
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}
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unsafe public virtual void Write(decimal value) {
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if (disposed)
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throw new ObjectDisposedException ("BinaryWriter", "Cannot write to a closed BinaryWriter");
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byte* value_ptr = (byte *)&value;
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/*
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* decimal in stream is lo32, mi32, hi32, ss32
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* but its internal structure si ss32, hi32, lo32, mi32
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*/
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if (BitConverter.IsLittleEndian) {
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for (int i = 0; i < 16; i++) {
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if (i < 4)
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buffer [i + 12] = value_ptr [i];
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else if (i < 8)
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buffer [i + 4] = value_ptr [i];
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else if (i < 12)
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buffer [i - 8] = value_ptr [i];
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else
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buffer [i - 8] = value_ptr [i];
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}
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} else {
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for (int i = 0; i < 16; i++) {
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if (i < 4)
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buffer [15 - i] = value_ptr [i];
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else if (i < 8)
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buffer [15 - i] = value_ptr [i];
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else if (i < 12)
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buffer [11 - i] = value_ptr [i];
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else
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buffer [19 - i] = value_ptr [i];
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}
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}
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OutStream.Write(buffer, 0, 16);
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}
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public virtual void Write(double value) {
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if (disposed)
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throw new ObjectDisposedException ("BinaryWriter", "Cannot write to a closed BinaryWriter");
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OutStream.Write(BitConverterLE.GetBytes(value), 0, 8);
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}
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public virtual void Write(short value) {
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if (disposed)
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throw new ObjectDisposedException ("BinaryWriter", "Cannot write to a closed BinaryWriter");
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buffer [0] = (byte) value;
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buffer [1] = (byte) (value >> 8);
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OutStream.Write(buffer, 0, 2);
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}
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public virtual void Write(int value) {
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if (disposed)
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throw new ObjectDisposedException ("BinaryWriter", "Cannot write to a closed BinaryWriter");
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buffer [0] = (byte) value;
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buffer [1] = (byte) (value >> 8);
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buffer [2] = (byte) (value >> 16);
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buffer [3] = (byte) (value >> 24);
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OutStream.Write(buffer, 0, 4);
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}
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public virtual void Write(long value) {
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if (disposed)
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throw new ObjectDisposedException ("BinaryWriter", "Cannot write to a closed BinaryWriter");
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for (int i = 0, sh = 0; i < 8; i++, sh += 8)
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buffer [i] = (byte) (value >> sh);
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OutStream.Write(buffer, 0, 8);
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}
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[CLSCompliant(false)]
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public virtual void Write(sbyte value) {
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if (disposed)
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throw new ObjectDisposedException ("BinaryWriter", "Cannot write to a closed BinaryWriter");
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buffer [0] = (byte) value;
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OutStream.Write(buffer, 0, 1);
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}
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public virtual void Write(float value) {
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if (disposed)
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throw new ObjectDisposedException ("BinaryWriter", "Cannot write to a closed BinaryWriter");
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OutStream.Write(BitConverterLE.GetBytes(value), 0, 4);
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}
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public virtual void Write(string value) {
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if (disposed)
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throw new ObjectDisposedException ("BinaryWriter", "Cannot write to a closed BinaryWriter");
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int len = m_encoding.GetByteCount (value);
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Write7BitEncodedInt (len);
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if (stringBuffer == null) {
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stringBuffer = new byte [512];
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maxCharsPerRound = 512 / m_encoding.GetMaxByteCount (1);
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}
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int chpos = 0;
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int chrem = value.Length;
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while (chrem > 0) {
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int cch = (chrem > maxCharsPerRound) ? maxCharsPerRound : chrem;
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int blen = m_encoding.GetBytes (value, chpos, cch, stringBuffer, 0);
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OutStream.Write (stringBuffer, 0, blen);
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chpos += cch;
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chrem -= cch;
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}
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}
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[CLSCompliant(false)]
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public virtual void Write(ushort value) {
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if (disposed)
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throw new ObjectDisposedException ("BinaryWriter", "Cannot write to a closed BinaryWriter");
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buffer [0] = (byte) value;
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buffer [1] = (byte) (value >> 8);
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OutStream.Write(buffer, 0, 2);
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}
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[CLSCompliant(false)]
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public virtual void Write(uint value) {
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if (disposed)
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throw new ObjectDisposedException ("BinaryWriter", "Cannot write to a closed BinaryWriter");
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buffer [0] = (byte) value;
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buffer [1] = (byte) (value >> 8);
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buffer [2] = (byte) (value >> 16);
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buffer [3] = (byte) (value >> 24);
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OutStream.Write(buffer, 0, 4);
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}
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[CLSCompliant(false)]
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public virtual void Write(ulong value) {
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if (disposed)
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throw new ObjectDisposedException ("BinaryWriter", "Cannot write to a closed BinaryWriter");
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for (int i = 0, sh = 0; i < 8; i++, sh += 8)
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buffer [i] = (byte) (value >> sh);
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OutStream.Write(buffer, 0, 8);
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}
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protected void Write7BitEncodedInt(int value) {
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do {
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int high = (value >> 7) & 0x01ffffff;
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byte b = (byte)(value & 0x7f);
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if (high != 0) {
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b = (byte)(b | 0x80);
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}
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Write(b);
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value = high;
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} while(value != 0);
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}
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}
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}
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