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comparison src/org/tmatesoft/hg/internal/InflaterDataAccess.java @ 584:ed243b668502

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Conditionally enable effective patch merge alternative for revlog reading
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 25 Apr 2013 16:08:17 +0200
parents 3c4db86e8c1f
children bcbcc318f250
comparison
equal deleted inserted replaced
583:47dfa0ec7e35 584:ed243b668502
14 * the terms of a license other than GNU General Public License 14 * the terms of a license other than GNU General Public License
15 * contact TMate Software at support@hg4j.com 15 * contact TMate Software at support@hg4j.com
16 */ 16 */
17 package org.tmatesoft.hg.internal; 17 package org.tmatesoft.hg.internal;
18 18
19 import java.io.EOFException;
19 import java.io.IOException; 20 import java.io.IOException;
20 import java.nio.ByteBuffer; 21 import java.nio.ByteBuffer;
21 import java.util.zip.DataFormatException; 22 import java.util.zip.DataFormatException;
22 import java.util.zip.Inflater; 23 import java.util.zip.Inflater;
23 import java.util.zip.ZipException; 24 import java.util.zip.ZipException;
151 return outBuffer.get(); 152 return outBuffer.get();
152 } 153 }
153 154
154 @Override 155 @Override
155 public void readBytes(byte[] b, int off, int len) throws IOException { 156 public void readBytes(byte[] b, int off, int len) throws IOException {
157 int fromBuffer;
156 do { 158 do {
157 int fromBuffer = outBuffer.remaining(); 159 fromBuffer = outBuffer.remaining();
158 if (fromBuffer > 0) { 160 if (fromBuffer > 0) {
159 if (fromBuffer >= len) { 161 if (fromBuffer >= len) {
160 outBuffer.get(b, off, len); 162 outBuffer.get(b, off, len);
161 return; 163 return;
162 } else { 164 } else {
164 off += fromBuffer; 166 off += fromBuffer;
165 len -= fromBuffer; 167 len -= fromBuffer;
166 // fall-through 168 // fall-through
167 } 169 }
168 } 170 }
169 fillOutBuffer(); 171 fromBuffer = fillOutBuffer();
170 } while (len > 0); 172 } while (len > 0 && fromBuffer > 0);
173 if (len > 0) {
174 // prevent hang up in this cycle if no more data is available, see Issue 25
175 throw new EOFException(String.format("No more compressed data is available to satisfy request for %d bytes. [finished:%b, needDict:%b, needInp:%b, available:%d", len, inflater.finished(), inflater.needsDictionary(), inflater.needsInput(), super.available()));
176 }
171 } 177 }
172 178
173 @Override 179 @Override
174 public void readBytes(ByteBuffer buf) throws IOException { 180 public void readBytes(ByteBuffer buf) throws IOException {
175 int len = Math.min(available(), buf.remaining()); 181 int len = Math.min(available(), buf.remaining());
218 } else { 224 } else {
219 // inflated nothing and doesn't want any more data (or no date available) - assume we're done 225 // inflated nothing and doesn't want any more data (or no date available) - assume we're done
220 assert inflater.finished(); 226 assert inflater.finished();
221 assert toRead <= 0; 227 assert toRead <= 0;
222 break; 228 break;
223 // prevent hang up in this cycle if no more data is available, see Issue 25
224 // throw new EOFException(String.format("No more compressed data is available to satisfy request for %d bytes. [finished:%b, needDict:%b, needInp:%b, available:%d", len, inflater.finished(), inflater.needsDictionary(), inflater.needsInput(), toRead));
225 } 229 }
226 } 230 }
227 off += n; 231 off += n;
228 len -= n; 232 len -= n;
229 inflatedBytes += n; 233 inflatedBytes += n;