diff options
Diffstat (limited to 'libjava/java/util/zip/ZipInputStream.java')
| -rw-r--r-- | libjava/java/util/zip/ZipInputStream.java | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/libjava/java/util/zip/ZipInputStream.java b/libjava/java/util/zip/ZipInputStream.java deleted file mode 100644 index 492cf67c733..00000000000 --- a/libjava/java/util/zip/ZipInputStream.java +++ /dev/null @@ -1,229 +0,0 @@ -/* Copyright (C) 1999, 2000 Free Software Foundation - - 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.*; - -/** - * @author Per Bothner - * @date May 1999. - */ - -/* - * Written using on-line Java Platform 1.2 API Specification, as well - * as "The Java Class Libraries", 2nd edition (Addison-Wesley, 1998). - * Status: Quite incomplete, but can read uncompressed .zip archives. - */ - -// JDK1.2 has "protected ZipEntry createZipEntry(String)" but is very -// vague about what the method does. FIXME. -// We do not calculate the CRC and compare it with the specified value; -// we probably should. FIXME. - - -public class ZipInputStream extends InflaterInputStream implements ZipConstants -{ - public ZipInputStream (InputStream in) - { - super (in, new Inflater (true)); - } - - public ZipEntry getNextEntry () throws IOException - { - if (current != null) - closeEntry(); - if (in.read() != 'P' - || in.read() != 'K') - return null; - int code = in.read(); - while (code == '\001') - { - code = in.read(); - if (code != '\002') - return null; - in.skip(16); - int size = read4(); - in.skip(4); - int fname_length = readu2(); - int extra_length = readu2(); - int fcomment_length = readu2(); - // `12' is the number of bytes between the comment length - // field and the end of the fixed part of the header: - // 2 bytes for `disk number start' - // 2 bytes for `internal file attributes' - // 4 bytes for `external file attributes' - // 4 bytes for `relative offset of local header' - in.skip(12 + fname_length + extra_length + fcomment_length); - if (in.read() != 'P' || in.read() != 'K') - return null; - code = in.read(); - } - if (code == '\005') - { - if (in.read() != '\006') - return null; - in.skip(16); - int comment_size = readu2(); - in.skip(comment_size); - if (in.read() != 'P' || in.read() != 'K') - return null; - code = in.read(); - } - if (code != '\003' - || in.read() != '\004') - return null; - int ex_version = readu2(); - current_flags = readu2(); - int method = readu2(); - int modtime = readu2(); - int moddate = readu2(); - int crc = read4(); - int compressedSize = read4(); - int uncompressedSize = read4(); - int filenameLength = readu2(); - int extraLength = readu2(); - byte[] bname = new byte[filenameLength]; - readFully(bname); - ZipEntry entry = new ZipEntry(new String(bname, "8859_1")); - if (extraLength > 0) - { - byte[] bextra = new byte[extraLength]; - readFully(bextra); - entry.extra = bextra; - } - entry.compressedSize = compressedSize; - entry.size = uncompressedSize; - entry.crc = (long) crc & 0xffffffffL; - entry.method = method; - entry.time = ZipEntry.timeFromDOS(moddate, modtime); - current = entry; - avail = uncompressedSize; - compressed_bytes = compressedSize; - return entry; - } - - // We override fill to let us control how much data gets read from - // the underlying input stream. This lets us avoid having to push - // back data. - protected void fill () throws IOException - { - int count = buf.length; - if (count > compressed_bytes) - count = compressed_bytes; - len = in.read(buf, 0, count); - if (len != -1) - { - compressed_bytes -= len; - inf.setInput(buf, 0, len); - } - } - - public int read (byte[] b, int off, int len) throws IOException - { - if (len > avail) - len = avail; - int count; - if (current.method == Deflater.DEFLATED) - count = super.read(b, off, len); - else - count = in.read(b, off, len); - if (count == -1 || avail == 0) - { - inf.reset(); - count = -1; - } - else - avail -= count; - return count; - } - - public long skip (long n) throws IOException - { - if (n > avail) - n = avail; - long count; - if (current.method == Deflater.DEFLATED) - count = super.skip(n); - else - count = in.skip(n); - avail = avail - (int) count; - return count; - } - - private void readFully (byte[] b) throws IOException - { - int off = 0; - int len = b.length; - while (len > 0) - { - int count = in.read(b, off, len); - if (count <= 0) - throw new EOFException(".zip archive ended prematurely"); - off += count; - len -= count; - } - } - - private int readu2 () throws IOException - { - int byte0 = in.read(); - int byte1 = in.read(); - if (byte0 < 0 || byte1 < 0) - throw new EOFException(".zip archive ended prematurely"); - return ((byte1 & 0xFF) << 8) | (byte0 & 0xFF); - } - - private int read4 () throws IOException - { - int byte0 = in.read(); - int byte1 = in.read(); - int byte2 = in.read(); - int byte3 = in.read(); - if (byte3 < 0) - throw new EOFException(".zip archive ended prematurely"); - return ((byte3 & 0xFF) << 24) + ((byte2 & 0xFF) << 16) - + ((byte1 & 0xFF) << 8) + (byte0 & 0xFF); - } - - public void closeEntry () throws IOException - { - if (current != null) - { - if (avail > 0) - skip (avail); - if ((current_flags & 8) != 0) - { - int sig = read4(); - if (sig != 0x04034b50) - throw new ZipException("bad/missing magic number at end of .zip entry"); - int crc = read4(); - int compressedSize = read4(); - int uncompressedSize = read4(); - if (current.compressedSize != compressedSize - || current.size != uncompressedSize - || current.crc != crc) - throw new ZipException("bad data descriptor at end of .zip entry"); - } - current = null; - avail = 0; - } - } - - public void close () throws IOException - { - current = null; - super.close(); - } - - private ZipEntry current; - private int current_flags; - // Number of uncompressed bytes to be read. - private int avail; - // Number of bytes we can read from underlying stream. - private int compressed_bytes; -} |