kvr000 commented on code in PR #455:
URL: https://github.com/apache/commons-compress/pull/455#discussion_r1451640542
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src/main/java/org/apache/commons/compress/archivers/zip/ZipFile.java:
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@@ -684,6 +715,53 @@ public ZipFile(final String name, final String encoding)
throws IOException {
this(new File(name).toPath(), encoding, true);
}
+ private static SeekableByteChannel openZipArchive(Path path,
ZipOpenOptions options) throws IOException {
+ FileChannel channel = FileChannel.open(path, StandardOpenOption.READ);
+ List<FileChannel> channels = new ArrayList<>();
+ try {
+ boolean is64 = positionAtEndOfCentralDirectoryRecord(channel);
+ long numberOfFiles;
+ if (is64) {
+ channel.position(channel.position() + ZipConstants.WORD +
ZipConstants.WORD + ZipConstants.DWORD);
+ ByteBuffer buf = ByteBuffer.allocate(ZipConstants.WORD);
+ buf.order(ByteOrder.LITTLE_ENDIAN);
+ IOUtils.readFully(channel, buf);
+ buf.flip();
+ numberOfFiles = buf.getInt() & 0xffffffffL;
+ } else {
+ channel.position(channel.position() + ZipConstants.WORD);
+ ByteBuffer buf = ByteBuffer.allocate(ZipConstants.SHORT);
+ buf.order(ByteOrder.LITTLE_ENDIAN);
+ IOUtils.readFully(channel, buf);
+ buf.flip();
+ numberOfFiles = (buf.getShort() & 0xffff) + 1;
Review Comment:
There isn't `ZipLong.getValue(ByteBuffer)` method, only `byte[]` overloads.
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