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re PR libgcj/27271 (i/o error (java.util.zip.ZipException: Deflated stream ends early.))

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PR libgcj/27271:
	* java/util/zip/ZipFile.java (getInputStream): Call addDummyByte
	on PartialInputStream.
	(PartialInputStream.dummyByteCount): New field.
	(PartialInputStream.fillBuffer): Handle dummy byte.
	(PartialInputStream.read): Likewise.
	(PartialInputStream.addDummyByte): New method.

From-SVN: r115378
This commit is contained in:
Tom Tromey 2006-07-12 17:00:49 +00:00 • committed by Tom Tromey
parent 93e890688c
commit e9186fbe67
2 changed files with 35 additions and 5 deletions
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30
libjava/classpath/java/util/zip/ZipFile.java
View file

@ -445,6 +445,7 @@ public class ZipFile implements ZipConstants
case ZipOutputStream.STORED:
return inp;
case ZipOutputStream.DEFLATED:
inp.addDummyByte();
final Inflater inf = new Inflater(true);
final int sz = (int) entry.getSize();
return new InflaterInputStream(inp, inf)
@ -520,6 +521,11 @@ public class ZipFile implements ZipConstants
private long bufferOffset;
private int pos;
private long end;
// We may need to supply an extra dummy byte to our reader.
// See Inflater. We use a count here to simplify the logic
// elsewhere in this class. Note that we ignore the dummy
// byte in methods where we know it is not needed.
private int dummyByteCount;
public PartialInputStream(RandomAccessFile raf, int bufferSize)
throws IOException
@ -540,8 +546,17 @@ public class ZipFile implements ZipConstants
{
synchronized (raf)
{
raf.seek(bufferOffset);
raf.readFully(buffer, 0, (int) Math.min(buffer.length, end - bufferOffset));
long len = end - bufferOffset;
if (len == 0 && dummyByteCount > 0)
{
buffer[0] = 0;
dummyByteCount = 0;
}
else
{
raf.seek(bufferOffset);
raf.readFully(buffer, 0, (int) Math.min(buffer.length, len));
}
}
}
@ -555,7 +570,7 @@ public class ZipFile implements ZipConstants
public int read() throws IOException
{
if (bufferOffset + pos >= end)
if (bufferOffset + pos >= end + dummyByteCount)
return -1;
if (pos == buffer.length)
{
@ -569,9 +584,9 @@ public class ZipFile implements ZipConstants
public int read(byte[] b, int off, int len) throws IOException
{
if (len > end - (bufferOffset + pos))
if (len > end + dummyByteCount - (bufferOffset + pos))
{
len = (int) (end - (bufferOffset + pos));
len = (int) (end + dummyByteCount - (bufferOffset + pos));
if (len == 0)
return -1;
}
@ -681,5 +696,10 @@ public class ZipFile implements ZipConstants
throw new AssertionError(uee);
}
}
public void addDummyByte()
{
dummyByteCount = 1;
}
}
}