private Map<ZipEntry, NameAndComment> populateFromCentralDirectory() throws IOException {
final HashMap<ZipEntry, NameAndComment> noUTF8Flag = new HashMap<ZipEntry, NameAndComment>();
this.positionAtCentralDirectory();
this.archive.readFully(this.WORD_BUF);
long sig = ZipLong.getValue(this.WORD_BUF);
if (sig != ZipFile.CFH_SIG && this.startsWithLocalFileHeader()) {
throw new IOException("central directory is empty, can't expand corrupt archive.");
}
while (sig == ZipFile.CFH_SIG) {
this.readCentralDirectoryEntry(noUTF8Flag);
this.archive.readFully(this.WORD_BUF);
sig = ZipLong.getValue(this.WORD_BUF);
}
return noUTF8Flag;
}
private void readCentralDirectoryEntry(final Map<ZipEntry, NameAndComment> noUTF8Flag)
throws IOException {
this.archive.readFully(this.CFH_BUF);
int off = 0;
final OffsetEntry offset = new OffsetEntry();
final Entry ze = new Entry(offset);
final int versionMadeBy = ZipShort.getValue(this.CFH_BUF, off);
off += 2;
ze.setPlatform(versionMadeBy >> 8 & 0xF);
off += 2;
final GeneralPurposeBit gpFlag = GeneralPurposeBit.parse(this.CFH_BUF, off);
final boolean hasUTF8Flag = gpFlag.usesUTF8ForNames();
final ZipEncoding entryEncoding =
hasUTF8Flag ? ZipEncodingHelper.UTF8_ZIP_ENCODING : this.zipEncoding;
ze.setGeneralPurposeBit(gpFlag);
off += 2;
ze.setMethod(ZipShort.getValue(this.CFH_BUF, off));
off += 2;
final long time = ZipUtil.dosToJavaTime(ZipLong.getValue(this.CFH_BUF, off));
ze.setTime(time);
off += 4;
ze.setCrc(ZipLong.getValue(this.CFH_BUF, off));
off += 4;
ze.setCompressedSize(ZipLong.getValue(this.CFH_BUF, off));
off += 4;
ze.setSize(ZipLong.getValue(this.CFH_BUF, off));
off += 4;
final int fileNameLen = ZipShort.getValue(this.CFH_BUF, off);
off += 2;
final int extraLen = ZipShort.getValue(this.CFH_BUF, off);
off += 2;
final int commentLen = ZipShort.getValue(this.CFH_BUF, off);
off += 2;
final int diskStart = ZipShort.getValue(this.CFH_BUF, off);
off += 2;
ze.setInternalAttributes(ZipShort.getValue(this.CFH_BUF, off));
off += 2;
ze.setExternalAttributes(ZipLong.getValue(this.CFH_BUF, off));
off += 4;
final byte[] fileName = new byte[fileNameLen];
this.archive.readFully(fileName);
ze.setName(entryEncoding.decode(fileName), fileName);
offset.headerOffset = ZipLong.getValue(this.CFH_BUF, off);
this.entries.add(ze);
final byte[] cdExtraData = new byte[extraLen];
this.archive.readFully(cdExtraData);
ze.setCentralDirectoryExtra(cdExtraData);
this.setSizesAndOffsetFromZip64Extra(ze, offset, diskStart);
final byte[] comment = new byte[commentLen];
this.archive.readFully(comment);
ze.setComment(entryEncoding.decode(comment));
if (!hasUTF8Flag && this.useUnicodeExtraFields) {
noUTF8Flag.put(ze, new NameAndComment(fileName, comment));
}
}
static {
CFH_SIG = ZipLong.getValue(ZipOutputStream.CFH_SIG);
}
private void positionAtCentralDirectory32() throws IOException {
this.skipBytes(16);
this.archive.readFully(this.WORD_BUF);
this.archive.seek(ZipLong.getValue(this.WORD_BUF));
}