Initial revision

From-SVN: r26263

libjava/java/util/zip/Adler32.java

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+/* Copyright (C) 1999  Cygnus Solutions
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package java.util.zip;
+
+/**
+ * @author Per Bothner
+ * @date April 6, 1999.
+ */
+
+/*
+ * Written using on-line Java Platform 1.2 API Specification, as well
+ * as "The Java Class Libraries", 2nd edition (Addison-Wesley, 1998).
+ * The actual Adler32 algorithm is taken from RFC 1950.
+ * Status:  Believed complete and correct.
+ */
+
+public class Adler32 implements Checksum
+{
+  private static int BASE = 65521; /* largest prime smaller than 65536 */
+
+  int s1;
+  int s2;
+
+  public Adler32 ()
+  {
+    reset();
+  }
+
+  public void reset () { s1 = 1;  s2 = 0; }
+
+  public void update (int bval)
+  {
+    s1 = (s1 + (bval & 0xFF)) % BASE;
+    s2 = (s1 + s2) % BASE;
+  }
+
+  public void update (byte[] buffer)
+  {
+    update(buffer, 0, buffer.length);
+  }
+
+  public void update (byte[] buf, int off, int len)
+  {
+    int s1 = this.s1;
+    int s2 = this.s2;
+    while (len > 0)
+      {
+	// We can defer the modulo operation.
+	int n = 4000;
+	if (n > len)
+	  n = len;
+	len -= n;
+	while (--n >= 0)
+	  {
+	    s1 = s1 + (buf[off++] & 0xFF);
+	    s2 = s2 + s1;
+	  }
+	s1 %= BASE;
+	s2 %= BASE;
+      }
+    this.s1 = s1;
+    this.s2 = s2;
+  }
+
+  public long getValue()
+  {
+    return ((long) s2 << 16) + s1;
+  }
+}
+
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libjava/java/util/zip/CRC32.java

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+/* Copyright (C) 1999  Cygnus Solutions
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package java.util.zip;
+
+/**
+ * @author Per Bothner
+ * @date April 1, 1999.
+ */
+
+/*
+ * Written using on-line Java Platform 1.2 API Specification, as well
+ * as "The Java Class Libraries", 2nd edition (Addison-Wesley, 1998).
+ * The actual CRC32 algorithm is taken from RFC 1952.
+ * Status:  Believed complete and correct.
+ */
+
+public class CRC32 implements Checksum
+{
+  int crc = 0;
+
+  static int[] crc_table = make_crc_table();
+
+  /* Make the table for a fast CRC. */
+  static int[] make_crc_table ()
+  {
+    int[] crc_table = new int[256];
+    for (int n = 0; n < 256; n++)
+      {
+	int c = n;
+	for (int k = 8;  --k >= 0; )
+	  {
+	    if ((c & 1) != 0)
+	      c = 0xedb88320 ^ (c >>> 1);
+	    else
+	      c = c >>> 1;
+	  }
+	crc_table[n] = c;
+      }
+    return crc_table;
+  }
+
+  public long getValue ()
+  {
+    return (long) crc & 0xffffffffL;
+  }
+
+  public void reset () { crc = 0; }
+
+  public void update (int bval)
+  {
+    int c = ~crc;
+    c = crc_table[(c ^ bval) & 0xff] ^ (c >>> 8);
+    crc = ~c;
+  }
+
+  public void update (byte[] buf, int off, int len)
+  {
+    int c = ~crc;
+    while (--len >= 0)
+      c = crc_table[(c ^ buf[off++]) & 0xff] ^ (c >>> 8);
+    crc = ~c;
+  }
+  public void update (byte[] buf) { update(buf, 0, buf.length); }
+}

libjava/java/util/zip/Checksum.java

@@ -0,0 +1,31 @@
+/* Copyright (C) 1999  Cygnus Solutions
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package java.util.zip;
+
+/**
+ * @author Per Bothner
+ * @date January 9, 1999.
+ */
+
+/*
+ * Written using on-line Java Platform 1.2 API Specification, as well
+ * as "The Java Class Libraries", 2nd edition (Addison-Wesley, 1998).
+ * Status:  Believed complete and correct.
+ */
+
+public interface Checksum
+{
+  public long getValue ();
+
+  public void reset ();
+
+  public void update (int bval);
+
+  public void update (byte[] buf, int off, int len);
+}

libjava/java/util/zip/Deflater.java

@@ -0,0 +1,13 @@
+/* Copyright (C) 1999  Cygnus Solutions
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package java.util.zip;
+
+public class Deflater
+{
+}

libjava/java/util/zip/DeflaterOutputStream.java

@@ -0,0 +1,46 @@
+/* Copyright (C) 1999  Cygnus Solutions
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package java.util.zip;
+import java.io.*;
+
+/** JUST AN INCOMPLETE STUB! */
+
+public class DeflaterOutputStream extends FilterOutputStream
+{
+  protected byte[] buf;
+
+  protected Deflater def;
+
+  public DeflaterOutputStream(OutputStream out)
+  {
+    this(out, null, 512);
+  }
+
+  public DeflaterOutputStream(OutputStream out, Deflater defl)
+  {
+    this(out, defl, 512);
+  }
+
+  public DeflaterOutputStream(OutputStream out, Deflater defl, int bufsize)
+  {
+    super(out);
+    buf = new byte[bufsize];
+    def = defl;
+  }
+
+  public void finish () throws IOException
+  {
+  }
+
+  public void close () throws IOException
+  {
+    finish();
+    out.close();
+  }
+}

libjava/java/util/zip/ZipConstants.java

@@ -0,0 +1,13 @@
+/* Copyright (C) 1999  Cygnus Solutions
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package java.util.zip;
+
+public interface ZipConstants
+{
+}

libjava/java/util/zip/ZipEntry.java

@@ -0,0 +1,84 @@
+/* Copyright (C) 1999  Cygnus Solutions
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package java.util.zip;
+
+/**
+ * @author Per Bothner
+ * @date January 6, 1999.
+ */
+
+/*
+ * Written using on-line Java Platform 1.2 API Specification, as well
+ * as "The Java Class Libraries", 2nd edition (Addison-Wesley, 1998).
+ * Status:  Believed complete and correct.
+ */
+
+public class ZipEntry
+{
+  // These values were determined using a simple test program.
+  public static final int STORED = 0;
+  public static final int DEFLATED = 8;
+
+  String comment;
+  long compressedSize = -1;
+  long crc = -1;
+  byte[] extra;
+  int method = -1;
+  String name;
+  long size = -1;
+  long time = -1;
+
+  ZipEntry next;
+
+  public ZipEntry (String name)
+  {
+    this.name = name;
+  }
+
+  public String getComment () { return comment; }
+
+  public long getCompressedSize () { return compressedSize; }
+
+  public long getCrc () { return crc; }
+
+  public byte[] getExtra() { return extra; }
+
+  public int getMethod () { return method; }
+
+  public String getName () { return name; }
+
+  public long getSize () { return size; }
+
+  public long getTime () { return time; }
+
+  public boolean isDirectory ()
+  {
+    if (name != null)
+      {
+	int nlen = name.length();
+	if (nlen > 0 && name.charAt(nlen-1) == '/')
+	  return true;
+      }
+    return false;
+  }
+
+  public void setComment (String comment) { this.comment = comment; }
+
+  public void setCrc (long crc) { this.crc = crc; }
+
+  public void setExtra (byte[] extra) { this.extra = extra; }
+
+  public void setMethod(int method) { this.method = method; }
+
+  public void setSize (long size) { this.size = size; }
+
+  public void setTime (long time) { this.time = time; }
+
+  public String toString () { return name; }
+}

libjava/java/util/zip/ZipException.java

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+// ZipException.java
+
+/* Copyright (C) 1998, 1999  Cygnus Solutions
+
+   This file is part of libjava.
+
+This software is copyrighted work licensed under the terms of the
+Libjava License.  Please consult the file "LIBJAVA_LICENSE" for
+details.  */
+
+package java.util.zip;
+
+/**
+ * @author Per Bothner
+ * @date January 9, 1999.
+ */
+
+/* Written using on-line Java Platform 1.2 API Specification.
+ * Believed complete and correct.
+ */
+
+public class ZipException extends java.io.IOException
+{
+  public ZipException ()
+  {
+    super();
+  }
+
+  public ZipException (String msg)
+  {
+    super(msg);
+  }
+}

libjava/java/util/zip/ZipFile.java

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+/* Copyright (C) 1999  Cygnus Solutions
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package java.util.zip;
+import java.io.*;
+
+/** JUST AN INCOMPLETE STUB! */
+
+public class ZipFile implements ZipConstants
+{
+
+  String name;
+  ZipEntry entries;
+
+  public ZipFile (String fname) throws IOException
+  {
+    name = fname;
+    // FIXME
+  }
+
+  public ZipFile (File f) throws IOException
+  {
+    this(f.getPath());
+  }
+
+  public java.util.Enumeration entries()
+  {
+    return new ZipEnumeration(this);
+  }
+
+  public void close() throws IOException
+  {
+    // FIXME
+  }
+
+  public ZipEntry getEntry(String name)
+  {
+    for (ZipEntry entry = entries;  entry != null;  entry = entry.next)
+      {
+	if (name.equals(entry.getName()))
+	  return entry;
+      }
+    return null;
+  }
+
+  public InputStream getInputStream(ZipEntry ze)  throws IOException
+  {
+    return null; // FIXME
+  }
+
+  public String getName () { return name; }
+}
+
+class ZipEnumeration implements java.util.Enumeration
+{
+  ZipEntry entry;
+
+  ZipEnumeration (ZipFile zfile)
+  {
+    entry = zfile.entries;
+  }
+
+  public boolean hasMoreElements ()
+  {
+    return entry != null;
+  }
+
+  public Object nextElement ()
+  {
+    ZipEntry cur = entry;
+    if (cur == null)
+      throw new java.util.NoSuchElementException();
+    entry = cur.next;
+    return cur;
+  }
+}

libjava/java/util/zip/ZipOutputStream.java

@@ -0,0 +1,26 @@
+/* Copyright (C) 1999  Cygnus Solutions
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package java.util.zip;
+import java.io.*;
+
+/** JUST AN INCOMPLETE STUB! */
+
+public class ZipOutputStream extends DeflaterOutputStream
+  implements ZipConstants
+{
+  public ZipOutputStream (OutputStream out)
+  {
+    super(out);
+  }
+
+  public void putNextEntry (ZipEntry entry) throws IOException
+  {
+    throw new Error ("java.util.zip.ZipOutputStream.putNextEntry:  not implemented");
+  }
+}