private void resolveLocalFileHeaderData(
final Map<ZipEntry, NameAndComment> entriesWithoutUTF8Flag) throws IOException {
for (final Entry ze : this.entries) {
final OffsetEntry offsetEntry = ze.getOffsetEntry();
final long offset = offsetEntry.headerOffset;
this.archive.seek(offset + 26L);
this.archive.readFully(this.SHORT_BUF);
final int fileNameLen = ZipShort.getValue(this.SHORT_BUF);
this.archive.readFully(this.SHORT_BUF);
final int extraFieldLen = ZipShort.getValue(this.SHORT_BUF);
int skipped;
for (int lenToSkip = fileNameLen; lenToSkip > 0; lenToSkip -= skipped) {
skipped = this.archive.skipBytes(lenToSkip);
if (skipped <= 0) {
throw new IOException("failed to skip file name in local file header");
}
}
final byte[] localExtraData = new byte[extraFieldLen];
this.archive.readFully(localExtraData);
ze.setExtra(localExtraData);
offsetEntry.dataOffset = offset + 26L + 2L + 2L + fileNameLen + extraFieldLen;
if (entriesWithoutUTF8Flag.containsKey(ze)) {
final NameAndComment nc = entriesWithoutUTF8Flag.get(ze);
ZipUtil.setNameAndCommentFromExtraFields(ze, nc.name, nc.comment);
}
final String name = ze.getName();
LinkedList<ZipEntry> entriesOfThatName = this.nameMap.get(name);
if (entriesOfThatName == null) {
entriesOfThatName = new LinkedList<ZipEntry>();
this.nameMap.put(name, entriesOfThatName);
}
entriesOfThatName.addLast(ze);
}
}
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));
}
}
private void setSizesAndOffsetFromZip64Extra(
final ZipEntry ze, final OffsetEntry offset, final int diskStart) throws IOException {
final Zip64ExtendedInformationExtraField z64 =
(Zip64ExtendedInformationExtraField)
ze.getExtraField(Zip64ExtendedInformationExtraField.HEADER_ID);
if (z64 != null) {
final boolean hasUncompressedSize = ze.getSize() == 4294967295L;
final boolean hasCompressedSize = ze.getCompressedSize() == 4294967295L;
final boolean hasRelativeHeaderOffset = offset.headerOffset == 4294967295L;
z64.reparseCentralDirectoryData(
hasUncompressedSize, hasCompressedSize, hasRelativeHeaderOffset, diskStart == 65535);
if (hasUncompressedSize) {
ze.setSize(z64.getSize().getLongValue());
} else if (hasCompressedSize) {
z64.setSize(new ZipEightByteInteger(ze.getSize()));
}
if (hasCompressedSize) {
ze.setCompressedSize(z64.getCompressedSize().getLongValue());
} else if (hasUncompressedSize) {
z64.setCompressedSize(new ZipEightByteInteger(ze.getCompressedSize()));
}
if (hasRelativeHeaderOffset) {
offset.headerOffset = z64.getRelativeHeaderOffset().getLongValue();
}
}
}