Mercurial > hg > blitz_stable

annotate src/com/go/trove/io/FastBufferedOutputStream.java @ 27:511648fa4d64 Version 2.1

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Version to 2.1
author Dan Creswell <dan.creswell@gmail.com>
date Mon, 04 Jan 2010 13:00:40 +0000
parents 3dc0c5604566
children
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1 /*
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2 * @(#)BufferedOutputStream.java 1.27 00/02/02
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3 *
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4 * Copyright 1994-2000 Sun Microsystems, Inc. All Rights Reserved.
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5 *
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6 * This software is the proprietary information of Sun Microsystems, Inc.
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7 * Use is subject to license terms.
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8 *
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9 */
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10
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11 package com.go.trove.io;
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12
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13 import java.io.*;
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14
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15 /**
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16 * FastBufferedOutputStream is just a slightly modified version of
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17 * {@link java.io.BufferedOutputStream}. The synchronization is gone, and so
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18 * writes are faster. Refer to the original BufferedOutputStream for
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19 * documentation.
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20 */
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21 /*
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22 * @author Arthur van Hoff
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23 * @version 1.27, 02/02/00
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24 * @since JDK1.0
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25 */
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26 public class FastBufferedOutputStream extends FilterOutputStream {
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27 // These fields have been renamed and made private. In the original, they
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28 // are protected.
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29 private byte[] mBuffer;
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30 private int mCount;
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31
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32 public FastBufferedOutputStream(OutputStream out) {
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33 this(out, 512);
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34 }
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35
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36 public FastBufferedOutputStream(OutputStream out, int size) {
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37 super(out);
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38 if (size <= 0) {
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39 throw new IllegalArgumentException("Buffer size <= 0");
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40 }
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41 mBuffer = new byte[size];
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42 }
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43
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44 private void flushBuffer() throws IOException {
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45 if (mCount > 0) {
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46 out.write(mBuffer, 0, mCount);
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47 mCount = 0;
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48 }
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49 }
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50
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51 public void write(int b) throws IOException {
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52 if (mCount >= mBuffer.length) {
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53 flushBuffer();
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54 }
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55 mBuffer[mCount++] = (byte)b;
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56 }
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57
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58 public void write(byte b[], int off, int len) throws IOException {
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59 if (len >= mBuffer.length) {
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60 flushBuffer();
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61 out.write(b, off, len);
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62 return;
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63 }
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64 if (len > mBuffer.length - mCount) {
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65 flushBuffer();
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66 }
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67 System.arraycopy(b, off, mBuffer, mCount, len);
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68 mCount += len;
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69 }
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70
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71 public synchronized void flush() throws IOException {
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72 flushBuffer();
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73 out.flush();
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74 }
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75 }