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ZipFile.java (readLeShort): Take and use DataInput as argument.

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* java/util/zip/ZipFile.java (readLeShort): Take and use DataInput as
	argument.
	(readLeShort): Likewise and use byte[].
	(readLeInt): Likewise.
	(readEntries): Use new versions of methods and use byte[] for reading
	a complete zip entry. Add ZipFile name to exceptions.
	(entries): Add ZipFile name to exceptions.
	(getEntry): Likewise.
	(checkLocalHeader): Use new versions of methods and add ZipFile name
	to exceptions.

From-SVN: r58697
This commit is contained in:
Mark Wielaard 2002-10-31 21:56:32 +00:00 • committed by Mark Wielaard
parent bab076f76a
commit 5e81d5beff
2 changed files with 71 additions and 39 deletions
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97
libjava/java/util/zip/ZipFile.java
View file

@ -1,5 +1,5 @@
/* java.util.zip.ZipFile
Copyright (C) 2001 Free Software Foundation, Inc.
Copyright (C) 2001, 2002 Free Software Foundation, Inc.
This file is part of GNU Classpath.
@ -36,6 +36,10 @@ obligated to do so. If you do not wish to do so, delete this
exception statement from your version. */
package java.util.zip;
import java.io.ByteArrayInputStream;
import java.io.DataInput;
import java.io.DataInputStream;
import java.io.File;
import java.io.InputStream;
import java.io.IOException;
@ -102,9 +106,9 @@ public class ZipFile implements ZipConstants
/**
* Opens a Zip file reading the given File in the given mode.
*
* If the OPEN_DELETE mode is specified, the zip file will be deleted at some time moment
* after it is opened. It will be deleted before the zip file is closed or the Virtual Machine
* exits.
* If the OPEN_DELETE mode is specified, the zip file will be deleted at
* some time moment after it is opened. It will be deleted before the zip
* file is closed or the Virtual Machine exits.
*
* The contents of the zip file will be accessible until it is closed.
*
@ -121,7 +125,8 @@ public class ZipFile implements ZipConstants
{
if ((mode & OPEN_DELETE) != 0)
{
throw new IllegalArgumentException("OPEN_DELETE mode not supported yet in java.util.zip.ZipFile");
throw new IllegalArgumentException
("OPEN_DELETE mode not supported yet in java.util.zip.ZipFile");
}
this.raf = new RandomAccessFile(file, "r");
this.name = file.getName();
@ -133,8 +138,11 @@ public class ZipFile implements ZipConstants
* @exception IOException if a i/o error occured.
* @exception EOFException if the file ends prematurely
*/
private final int readLeShort() throws IOException {
return raf.readUnsignedByte() | raf.readUnsignedByte() << 8;
private final int readLeShort(DataInput di) throws IOException
{
byte[] b = new byte[2];
di.readFully(b);
return (b[0] & 0xff) | (b[1] & 0xff) << 8;
}
/**
@ -142,8 +150,12 @@ public class ZipFile implements ZipConstants
* @exception IOException if a i/o error occured.
* @exception EOFException if the file ends prematurely
*/
private final int readLeInt() throws IOException {
return readLeShort() | readLeShort() << 16;
private final int readLeInt(DataInput di) throws IOException
{
byte[] b = new byte[4];
di.readFully(b);
return ((b[0] & 0xff) | (b[1] & 0xff) << 8)
| ((b[2] & 0xff) | (b[3] & 0xff) << 8) << 16;
}
/**
@ -164,36 +176,43 @@ public class ZipFile implements ZipConstants
{
if (pos < 0)
throw new ZipException
("central directory not found, probably not a zip file");
("central directory not found, probably not a zip file: " + name);
raf.seek(pos--);
}
while (readLeInt() != ENDSIG);
while (readLeInt(raf) != ENDSIG);
if (raf.skipBytes(ENDTOT - ENDNRD) != ENDTOT - ENDNRD)
throw new EOFException();
int count = readLeShort();
throw new EOFException(name);
int count = readLeShort(raf);
if (raf.skipBytes(ENDOFF - ENDSIZ) != ENDOFF - ENDSIZ)
throw new EOFException();
int centralOffset = readLeInt();
throw new EOFException(name);
int centralOffset = readLeInt(raf);
entries = new ZipEntry[count];
raf.seek(centralOffset);
byte[] ebs = new byte[24];
ByteArrayInputStream ebais = new ByteArrayInputStream(ebs);
DataInputStream edip = new DataInputStream(ebais);
for (int i = 0; i < count; i++)
{
if (readLeInt() != CENSIG)
throw new ZipException("Wrong Central Directory signature");
if (readLeInt(raf) != CENSIG)
throw new ZipException("Wrong Central Directory signature: " + name);
if (raf.skipBytes(CENHOW - CENVEM) != CENHOW - CENVEM)
throw new EOFException();
int method = readLeShort();
int dostime = readLeInt();
int crc = readLeInt();
int csize = readLeInt();
int size = readLeInt();
int nameLen = readLeShort();
int extraLen = readLeShort();
int commentLen = readLeShort();
throw new EOFException(name);
raf.readFully(ebs);
ebais.reset();
int method = readLeShort(edip);
int dostime = readLeInt(edip);
int crc = readLeInt(edip);
int csize = readLeInt(edip);
int size = readLeInt(edip);
int nameLen = readLeShort(edip);
int extraLen = readLeShort(edip);
int commentLen = readLeShort(edip);
if (raf.skipBytes(CENOFF - CENDSK) != CENOFF - CENDSK)
throw new EOFException();
int offset = readLeInt();
throw new EOFException(name);
int offset = readLeInt(raf);
byte[] buffer = new byte[Math.max(nameLen, commentLen)];
@ -244,7 +263,7 @@ public class ZipFile implements ZipConstants
public Enumeration entries()
{
if (entries == null)
throw new IllegalStateException("ZipFile has closed");
throw new IllegalStateException("ZipFile has closed: " + name);
return new ZipEntryEnumeration(entries);
}
@ -265,7 +284,7 @@ public class ZipFile implements ZipConstants
public ZipEntry getEntry(String name)
{
if (entries == null)
throw new IllegalStateException("ZipFile has closed");
throw new IllegalStateException("ZipFile has closed: " + name);
int index = getEntryIndex(name);
return index >= 0 ? (ZipEntry) entries[index].clone() : null;
}
@ -283,24 +302,24 @@ public class ZipFile implements ZipConstants
synchronized (raf)
{
raf.seek(entry.offset);
if (readLeInt() != LOCSIG)
throw new ZipException("Wrong Local header signature");
if (readLeInt(raf) != LOCSIG)
throw new ZipException("Wrong Local header signature: " + name);
/* skip version and flags */
if (raf.skipBytes(LOCHOW - LOCVER) != LOCHOW - LOCVER)
throw new EOFException();
throw new EOFException(name);
if (entry.getMethod() != readLeShort())
throw new ZipException("Compression method mismatch");
if (entry.getMethod() != readLeShort(raf))
throw new ZipException("Compression method mismatch: " + name);
/* Skip time, crc, size and csize */
if (raf.skipBytes(LOCNAM - LOCTIM) != LOCNAM - LOCTIM)
throw new EOFException();
throw new EOFException(name);
if (entry.getName().length() != readLeShort())
throw new ZipException("file name length mismatch");
if (entry.getName().length() != readLeShort(raf))
throw new ZipException("file name length mismatch: " + name);
int extraLen = entry.getName().length() + readLeShort();
int extraLen = entry.getName().length() + readLeShort(raf);
return entry.offset + LOCHDR + extraLen;
}
}