/** * Reads the central directory of the given archive and populates * the internal tables with ZipArchiveEntry instances. * * <p>The ZipArchiveEntrys will know all data that can be obtained from * the central directory alone, but not the data that requires the * local file header or additional data to be read.</p> * * @return a Map<ZipArchiveEntry, NameAndComment>> of * zipentries that didn't have the language encoding flag set when * read. */ private java.util.Map <ZipArchiveEntry, IAC_NameAndComment> populateFromCentralDirectory() //throws IOException { java.util.HashMap <ZipArchiveEntry, IAC_NameAndComment> noUTF8Flag = new java.util.HashMap <ZipArchiveEntry, IAC_NameAndComment>(); positionAtCentralDirectory(); byte[] cfh = new byte[CFH_LEN]; byte[] signatureBytes = new byte[WORD]; archive.readFully(signatureBytes); long sig = ZipLong.getValue(signatureBytes); long cfhSig = ZipLong.getValue(ZipArchiveOutputStream.CFH_SIG); if (sig != cfhSig && startsWithLocalFileHeader()) { throw new java.io.IOException("central directory is empty, can't expand" + " corrupt archive."); } while (sig == cfhSig) { archive.readFully(cfh); int off = 0; ZipArchiveEntry ze = new ZipArchiveEntry(); int versionMadeBy = ZipShort.getValue(cfh, off); off += SHORT; ze.setPlatform((versionMadeBy >> BYTE_SHIFT) & NIBLET_MASK); off += SHORT; // skip version info GeneralPurposeBit gpFlag = GeneralPurposeBit.parse(cfh, off); bool hasUTF8Flag = gpFlag.usesUTF8ForNames(); ZipEncoding entryEncoding = hasUTF8Flag ? ZipEncodingHelper.UTF8_ZIP_ENCODING : zipEncoding; ze.setGeneralPurposeBit(gpFlag); off += SHORT; ze.setMethod(ZipShort.getValue(cfh, off)); off += SHORT; // FIXME this is actually not very cpu cycles friendly as we are converting from // dos to java while the underlying Sun implementation will convert // from java to dos time for internal storage... long time = ZipUtil.dosToJavaTime(ZipLong.getValue(cfh, off)); ze.setTime(time); off += WORD; ze.setCrc(ZipLong.getValue(cfh, off)); off += WORD; ze.setCompressedSize(ZipLong.getValue(cfh, off)); off += WORD; ze.setSize(ZipLong.getValue(cfh, off)); off += WORD; int fileNameLen = ZipShort.getValue(cfh, off); off += SHORT; int extraLen = ZipShort.getValue(cfh, off); off += SHORT; int commentLen = ZipShort.getValue(cfh, off); off += SHORT; off += SHORT; // disk number ze.setInternalAttributes(ZipShort.getValue(cfh, off)); off += SHORT; ze.setExternalAttributes(ZipLong.getValue(cfh, off)); off += WORD; byte[] fileName = new byte[fileNameLen]; archive.readFully(fileName); ze.setName(entryEncoding.decode(fileName)); // LFH offset, IAC_OffsetEntry offset = new IAC_OffsetEntry(); offset.headerOffset = ZipLong.getValue(cfh, off); // data offset will be filled later entries.put(ze, offset); nameMap.put(ze.getName(), ze); byte[] cdExtraData = new byte[extraLen]; archive.readFully(cdExtraData); ze.setCentralDirectoryExtra(cdExtraData); byte[] comment = new byte[commentLen]; archive.readFully(comment); ze.setComment(entryEncoding.decode(comment)); archive.readFully(signatureBytes); sig = ZipLong.getValue(signatureBytes); if (!hasUTF8Flag && useUnicodeExtraFields) { noUTF8Flag.put(ze, new IAC_NameAndComment(fileName, comment)); } } return(noUTF8Flag); }
public ZipArchiveEntry getNextZipEntry() //throws IOException { if (closed || hitCentralDirectory) { return(null); } if (current != null) { closeEntry(); } byte[] lfh = new byte[LFH_LEN]; try { readFully(lfh); } catch (java.io.EOFException) { return(null); } ZipLong sig = new ZipLong(lfh); if (sig.equals(ZipLong.CFH_SIG)) { hitCentralDirectory = true; return(null); } if (!sig.equals(ZipLong.LFH_SIG)) { return(null); } int off = WORD; current = new ZipArchiveEntry(); int versionMadeBy = ZipShort.getValue(lfh, off); off += SHORT; current.setPlatform((versionMadeBy >> ZipFile.BYTE_SHIFT) & ZipFile.NIBLET_MASK); GeneralPurposeBit gpFlag = GeneralPurposeBit.parse(lfh, off); bool hasUTF8Flag = gpFlag.usesUTF8ForNames(); ZipEncoding entryEncoding = hasUTF8Flag ? ZipEncodingHelper.UTF8_ZIP_ENCODING : zipEncoding; hasDataDescriptor = gpFlag.usesDataDescriptor(); current.setGeneralPurposeBit(gpFlag); off += SHORT; current.setMethod(ZipShort.getValue(lfh, off)); off += SHORT; long time = ZipUtil.dosToJavaTime(ZipLong.getValue(lfh, off)); current.setTime(time); off += WORD; if (!hasDataDescriptor) { current.setCrc(ZipLong.getValue(lfh, off)); off += WORD; current.setCompressedSize(ZipLong.getValue(lfh, off)); off += WORD; current.setSize(ZipLong.getValue(lfh, off)); off += WORD; } else { off += 3 * WORD; } int fileNameLen = ZipShort.getValue(lfh, off); off += SHORT; int extraLen = ZipShort.getValue(lfh, off); off += SHORT; byte[] fileName = new byte[fileNameLen]; readFully(fileName); current.setName(entryEncoding.decode(fileName)); byte[] extraData = new byte[extraLen]; readFully(extraData); current.setExtra(extraData); if (!hasUTF8Flag && useUnicodeExtraFields) { ZipUtil.setNameAndCommentFromExtraFields(current, fileName, null); } return(current); }