TZIPFile.cxx

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// @(#)root/io:$Id$
// Author: Fons Rademakers and Lassi Tuura  30/6/04
 
/*************************************************************************
 * Copyright (C) 1995-2004, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
 
/**
\class TZIPFile
\ingroup IO
 
Describes a ZIP archive file containing multiple sub-files.
 
Typically the sub-files are ROOT files. Notice that
the ROOT files should not be compressed when being added to the
ZIP file, since ROOT files are normally already compressed.
Such a ZIP file should be created like:
    zip -n root multi file1.root file2.root
which creates a ZIP file multi.zip.
A ZIP archive consists of files compressed with the popular ZLIB
compression algorithm. The archive format is used among others by
PKZip and Info-ZIP. The compression algorithm is also used by
GZIP and the PNG graphics standard. The format of the archives is
explained briefly below. This class provides an interface to read
such archives.
A ZIP archive contains a prefix, series of archive members
(sub-files), and a central directory. In theory the archive could
span multiple disks (or files) with the central directory of the
whole archive on the last disk, but this class does not support
such multi-part archives. The prefix is only used in self-extracting
executable archive files.
The members are stored in the archive sequentially, each with a
local header followed by the (optionally) compressed data; the local
header describes the member, including its file name and compressed
and real sizes. The central directory includes the member details
again, plus allows an extra member comment to be added. The last
member in the central directory is an end marker that can contain
a comment for the whole archive. Both the local header and the
central directory can also carry extra member-specific data; the
data in the local and global parts can be different.
The fact that the archive has a global directory makes it efficient
and allows for only the reading of the desired data, one does not
have to scan through the whole file to find the desired sub-file.
The Zip64 extensions are supported so files larger than 2GB can be
stored in archives larger than 4 GB.
Once the archive has been opened, the client can query the members
and read their contents by asking the archive for an offset where
the sub-file starts. The members can be accessed in any order.
*/
 
#include "TZIPFile.h"
#include "TFile.h"
#include "TObjArray.h"
 
 
ClassImp(TZIPFile);
 
////////////////////////////////////////////////////////////////////////////////
/// Default ctor.
 
TZIPFile::TZIPFile() : TArchiveFile()
{
   fDirPos     = 0;
   fDirSize    = 0;
   fDirOffset  = 0;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Specify the archive name and member name. The member can be a decimal
/// number which allows to access the n-th member.
 
TZIPFile::TZIPFile(const char *archive, const char *member, TFile *file)
   : TArchiveFile(archive, member, file)
{
   fDirPos     = 0;
   fDirSize    = 0;
   fDirOffset  = 0;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Open archive and read end-header and directory. Returns -1 in case
/// of error, 0 otherwise.
 
Int_t TZIPFile::OpenArchive()
{
   if (ReadEndHeader(FindEndHeader()) == -1)
      return -1;
   return ReadDirectory();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Find the end header of the ZIP archive. Returns 0 in case of error.
 
Long64_t TZIPFile::FindEndHeader()
{
   const Int_t kBUFSIZE = 1024;
   Long64_t    size = fFile->GetSize();
   Long64_t    limit = TMath::Min(size, Long64_t(kMAX_VAR_LEN));
   char        buf[kBUFSIZE+4];
 
   // Note, this works correctly even if the signature straddles read
   // boundaries since we always read an overlapped area of four
   // bytes on the next read
   for (Long64_t offset = 4; offset < limit; ) {
      offset = TMath::Min(offset + kBUFSIZE, limit);
 
      Long64_t pos = size - offset;
      Int_t    n = TMath::Min(kBUFSIZE+4, Int_t(offset));
 
      fFile->Seek(pos);
      if (fFile->ReadBuffer(buf, n)) {
         Error("FindEndHeader", "error reading %d bytes at %lld", n, pos);
         return 0;
      }
 
      for (Int_t i = n - 4; i > 0; i--)
         if (buf[i]   == 0x50 && buf[i+1] == 0x4b &&
             buf[i+2] == 0x05 && buf[i+3] == 0x06) {
            return pos + i;
         }
   }
 
   Error("FindEndHeader", "did not find end header in %s", fArchiveName.Data());
 
   return 0;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Read the end header of the ZIP archive including the archive comment
/// at the current file position. Check that it really was a single-disk
/// archive with all the entries as expected. Most importantly, figure
/// out where the central directory begins. Returns -1 in case of error,
/// 0 otherwise.
 
Int_t TZIPFile::ReadEndHeader(Long64_t pos)
{
   char buf[kEND_HEADER_SIZE];
 
   // read and validate first the end header magic
   fFile->Seek(pos);
   if (fFile->ReadBuffer(buf, kZIP_MAGIC_LEN) ||
       Get(buf, kZIP_MAGIC_LEN) != kEND_HEADER_MAGIC) {
      Error("ReadEndHeader", "wrong end header magic in %s", fArchiveName.Data());
      return -1;
   }
 
   // read rest of the header
   if (fFile->ReadBuffer(buf + kZIP_MAGIC_LEN,  kEND_HEADER_SIZE - kZIP_MAGIC_LEN)) {
      Error("ReadEndHeader", "error reading %d end header bytes from %s",
            kEND_HEADER_SIZE - kZIP_MAGIC_LEN, fArchiveName.Data());
      return -1;
   }
 
   UInt_t   disk    = Get(buf + kEND_DISK_OFF,       kEND_DISK_LEN);
   UInt_t   dirdisk = Get(buf + kEND_DIR_DISK_OFF,   kEND_DIR_DISK_LEN);
   UInt_t   dhdrs   = Get(buf + kEND_DISK_HDRS_OFF,  kEND_DISK_HDRS_LEN);
   UInt_t   thdrs   = Get(buf + kEND_TOTAL_HDRS_OFF, kEND_TOTAL_HDRS_LEN);
   Long64_t dirsz   = Get(buf + kEND_DIR_SIZE_OFF,   kEND_DIR_SIZE_LEN);
   Long64_t diroff  = Get(buf + kEND_DIR_OFFSET_OFF, kEND_DIR_OFFSET_LEN);
   Int_t    commlen = Get(buf + kEND_COMMENTLEN_OFF, kEND_COMMENTLEN_LEN);
 
   if (disk != 0 || dirdisk != 0) {
      Error("ReadHeader", "only single disk archives are supported in %s",
            fArchiveName.Data());
      return -1;
   }
   if (dhdrs != thdrs) {
      Error("ReadEndHeader", "inconsistency in end header data in %s",
            fArchiveName.Data());
      return -1;
   }
 
   char *comment = new char[commlen+1];
   if (fFile->ReadBuffer(comment, commlen)) {
      Error("ReadEndHeader", "error reading %d end header comment bytes from %s",
            commlen, fArchiveName.Data());
      delete [] comment;
      return -1;
   }
   comment[commlen] = '\0';
 
   fComment   = comment;
   fDirOffset = fDirPos = diroff;
   fDirSize   = dirsz;
 
   delete [] comment;
 
   // Try to read Zip64 end of central directory locator
   Long64_t recoff = ReadZip64EndLocator(pos - kZIP64_EDL_HEADER_SIZE);
   if (recoff < 0) {
      if (recoff == -1)
         return -1;
      return 0;
   }
 
   if (ReadZip64EndRecord(recoff) < 0)
      return -1;
 
   return 0;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Read Zip64 end of central directory locator. Returns -1 in case of error,
/// -2 in case end locator magic is not found (i.e. not a zip64 file) and
/// offset of Zip64 end of central directory record in case of success.
 
Long64_t TZIPFile::ReadZip64EndLocator(Long64_t pos)
{
   char buf[kZIP64_EDL_HEADER_SIZE];
 
   // read and validate first the end header magic
   fFile->Seek(pos);
   if (fFile->ReadBuffer(buf, kZIP_MAGIC_LEN) ||
       Get(buf, kZIP_MAGIC_LEN) != kZIP64_EDL_HEADER_MAGIC) {
      return -2;
   }
 
   // read rest of the header
   if (fFile->ReadBuffer(buf + kZIP_MAGIC_LEN,  kZIP64_EDL_HEADER_SIZE - kZIP_MAGIC_LEN)) {
      Error("ReadZip64EndLocator", "error reading %d Zip64 end locator header bytes from %s",
            kZIP64_EDL_HEADER_SIZE - kZIP_MAGIC_LEN, fArchiveName.Data());
      return -1;
   }
 
   UInt_t   dirdisk = Get(  buf + kZIP64_EDL_DISK_OFF,       kZIP64_EDL_DISK_LEN);
   Long64_t recoff  = Get64(buf + kZIP64_EDL_REC_OFFSET_OFF, kZIP64_EDL_REC_OFFSET_LEN);
   UInt_t   totdisk = Get(  buf + kZIP64_EDL_TOTAL_DISK_OFF, kZIP64_EDL_TOTAL_DISK_LEN);
 
   if (dirdisk != 0 || totdisk != 1) {
      Error("ReadZip64EndLocator", "only single disk archives are supported in %s",
            fArchiveName.Data());
      return -1;
   }
 
   return recoff;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Read Zip64 end of central directory record. Returns -1 in case of error
/// and 0 in case of success.
 
Int_t TZIPFile::ReadZip64EndRecord(Long64_t pos)
{
   char buf[kZIP64_EDR_HEADER_SIZE];
 
   // read and validate first the end header magic
   fFile->Seek(pos);
   if (fFile->ReadBuffer(buf, kZIP_MAGIC_LEN) ||
       Get(buf, kZIP_MAGIC_LEN) != kZIP64_EDR_HEADER_MAGIC) {
      Error("ReadZip64EndRecord", "no Zip64 end of directory record\n");
      return -1;
   }
 
   // read rest of the header
   if (fFile->ReadBuffer(buf + kZIP_MAGIC_LEN,  kZIP64_EDR_HEADER_SIZE - kZIP_MAGIC_LEN)) {
      Error("ReadZip64EndRecord", "error reading %d Zip64 end record header bytes from %s",
            kZIP64_EDR_HEADER_SIZE - kZIP_MAGIC_LEN, fArchiveName.Data());
      return -1;
   }
 
   Long64_t dirsz  = Get64(buf + kZIP64_EDR_DIR_SIZE_OFF,   kZIP64_EDR_DIR_SIZE_LEN);
   Long64_t diroff = Get64(buf + kZIP64_EDR_DIR_OFFSET_OFF, kZIP64_EDR_DIR_OFFSET_LEN);
 
   fDirOffset = fDirPos = diroff;
   fDirSize   = dirsz;
 
   return 0;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Read the directory of the ZIP archive. Returns -1 in case of error,
/// 0 otherwise.
 
Int_t TZIPFile::ReadDirectory()
{
   char   buf[kDIR_HEADER_SIZE];
   UInt_t n;
 
   // read and validate first the header magic
   fFile->Seek(fDirPos);
   if (fFile->ReadBuffer(buf, kZIP_MAGIC_LEN) ||
       (n = Get(buf, kZIP_MAGIC_LEN)) != kDIR_HEADER_MAGIC) {
      Error("ReadDirectory", "wrong directory header magic in %s",
            fArchiveName.Data());
      return -1;
   }
 
   // now read the full directory
   while (n == kDIR_HEADER_MAGIC) {
      // read the rest of the header
      if (fFile->ReadBuffer(buf + kZIP_MAGIC_LEN, kDIR_HEADER_SIZE - kZIP_MAGIC_LEN)) {
         Error("ReadDirectory", "error reading %d directory bytes from %s",
               kDIR_HEADER_SIZE - kZIP_MAGIC_LEN, fArchiveName.Data());
         return -1;
      }
 
      UInt_t   version = Get(buf + kDIR_VREQD_OFF,      kDIR_VREQD_LEN);
      UInt_t   flags   = Get(buf + kDIR_FLAG_OFF,       kDIR_FLAG_LEN);
      UInt_t   method  = Get(buf + kDIR_METHOD_OFF,     kDIR_METHOD_LEN);
      UInt_t   time    = Get(buf + kDIR_DATE_OFF,       kDIR_DATE_LEN);
      UInt_t   crc32   = Get(buf + kDIR_CRC32_OFF,      kDIR_CRC32_LEN);
      Long64_t csize   = Get(buf + kDIR_CSIZE_OFF,      kDIR_CSIZE_LEN);
      Long64_t usize   = Get(buf + kDIR_USIZE_OFF,      kDIR_USIZE_LEN);
      Int_t    namelen = Get(buf + kDIR_NAMELEN_OFF,    kDIR_NAMELEN_LEN);
      Int_t    extlen  = Get(buf + kDIR_EXTRALEN_OFF,   kDIR_EXTRALEN_LEN);
      Int_t    commlen = Get(buf + kDIR_COMMENTLEN_OFF, kDIR_COMMENTLEN_LEN);
      UInt_t   disk    = Get(buf + kDIR_DISK_START_OFF, kDIR_DISK_START_LEN);
      UInt_t   iattr   = Get(buf + kDIR_INT_ATTR_OFF,   kDIR_INT_ATTR_LEN);
      UInt_t   xattr   = Get(buf + kDIR_EXT_ATTR_OFF,   kDIR_EXT_ATTR_LEN);
      Long64_t offset  = Get(buf + kDIR_ENTRY_POS_OFF,  kDIR_ENTRY_POS_LEN);
 
      // check value sanity and the variable-length fields
      if (Get(buf + kDIR_MAGIC_OFF, kZIP_MAGIC_LEN) != kDIR_HEADER_MAGIC ||
          version > kARCHIVE_VERSION ||
          flags & 8 ||
          (method != kSTORED && method != kDEFLATED) ||
          disk != 0 ||
          csize < 0 ||
          usize < 0 ||
          csize > kMaxUInt ||
          usize > kMaxUInt) {
         Error("ReadDirectory", "inconsistency in directory data in %s",
               fArchiveName.Data());
         return -1;
      }
 
      char *name    = new char[namelen+1];
      char *extra   = new char[extlen];
      char *comment = new char[commlen+1];
      if (fFile->ReadBuffer(name, namelen) ||
          fFile->ReadBuffer(extra, extlen) ||
          fFile->ReadBuffer(comment, commlen)) {
         Error("ReadDirectory", "error reading additional directory data from %s",
               fArchiveName.Data());
         delete [] name;
         delete [] extra;
         delete [] comment;
         return -1;
      }
      name[namelen]    = '\0';
      comment[commlen] = '\0';
 
      // create a new archive member and store the fields
      TZIPMember *m = new TZIPMember(name);
      fMembers->Add(m);
 
      m->fMethod = method;
      m->fLevel  = method == kSTORED ? 0
                                     : (flags & 6)/2 == 0 ? 3  // default (:N)
                                     : (flags & 6)/2 == 1 ? 9  // best (:X)
                                     : (flags & 6)/2 == 2 ? 2  // fast (:F)
                                     : (flags & 6)/2 == 3 ? 1  // fastest (:F)
                                     : 3;                      // unreached
      m->fCsize     = csize;
      m->fDsize     = usize;
      m->fCRC32     = crc32;
      m->fModTime.Set(time, kTRUE);   // DOS date/time format
      m->fGlobalLen = extlen;
      m->fGlobal    = extra;
      m->fComment   = comment;
      m->fAttrInt   = iattr;
      m->fAttrExt   = xattr;
      m->fPosition  = offset;
 
      delete [] name;
      delete [] comment;
      // extra is adopted be the TZIPMember
 
      if (DecodeZip64ExtendedExtraField(m) == -1)
         return -1;
 
      if (gDebug)
         Info("ReadDirectory", "%lld  %lld  %s  %s",
              m->GetDecompressedSize(), m->GetCompressedSize(),
              m->GetModTime().AsSQLString(), m->GetName());
 
      // done, read the next magic
      if (fFile->ReadBuffer(buf, kZIP_MAGIC_LEN)) {
         Error("ReadDirectory", "error reading %d directory bytes from %s",
               kZIP_MAGIC_LEN, fArchiveName.Data());
         return -1;
      }
      n = Get(buf, kZIP_MAGIC_LEN);
   }
 
   // should now see end of archive
   if (n != kEND_HEADER_MAGIC && n != kZIP64_EDR_HEADER_MAGIC) {
      Error("ReadDirectory", "wrong end header magic in %s", fArchiveName.Data());
      return -1;
   }
 
   return 0;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Read the member header of the ZIP archive. Sets the position where
/// the data starts in the member object. Returns -1 in case of error,
/// 0 otherwise.
 
Int_t TZIPFile::ReadMemberHeader(TZIPMember *member)
{
   // read file header to find start of data, since extra len might be
   // different we cannot take it from the directory data
   char buf[kENTRY_HEADER_SIZE];
 
   // read and validate first the entry header magic
   fFile->Seek(member->fPosition);
   if (fFile->ReadBuffer(buf, kZIP_MAGIC_LEN) ||
       Get(buf, kZIP_MAGIC_LEN) != kENTRY_HEADER_MAGIC) {
      Error("ReadMemberHeader", "wrong entry header magic in %s",
            fArchiveName.Data());
      return -1;
   }
 
   // read rest of the header
   if (fFile->ReadBuffer(buf + kZIP_MAGIC_LEN,  kENTRY_HEADER_SIZE - kZIP_MAGIC_LEN)) {
      Error("ReadMemberHeader", "error reading %d member header bytes from %s",
            kENTRY_HEADER_SIZE - kZIP_MAGIC_LEN, fArchiveName.Data());
      return -1;
   }
   Int_t namelen = Get(buf + kENTRY_NAMELEN_OFF,  kENTRY_NAMELEN_LEN);
   Int_t extlen  = Get(buf + kENTRY_EXTRALEN_OFF, kENTRY_EXTRALEN_LEN);
 
   member->fFilePosition = member->fPosition + kENTRY_HEADER_SIZE +
                           namelen + extlen;
 
   return 0;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Decode the Zip64 extended extra field. If global is true, decode the
/// extra field coming from the central directory, if false decode the
/// extra field coming from the local file header. Returns -1 in case of
/// error, -2 in case Zip64 extra block was not found and 0 in case of
/// success.
 
Int_t TZIPFile::DecodeZip64ExtendedExtraField(TZIPMember *m, Bool_t global)
{
   char  *buf;
   Int_t  len;
   Int_t  ret = -2;
 
   if (global) {
      buf = (char *) m->fGlobal;
      len = m->fGlobalLen;
   } else {
      buf = (char *) m->fLocal;
      len = m->fLocalLen;
   }
 
   if (!buf || !len) {
      return ret;
   }
 
   Int_t off = 0;
   while (len > 0) {
      UInt_t   tag  = Get(buf + off + kZIP64_EXTENDED_MAGIC_OFF, kZIP64_EXTENDED_MAGIC_LEN);
      UInt_t   size = Get(buf + off + kZIP64_EXTENDED_SIZE_OFF,  kZIP64_EXTENDED_SIZE_LEN);
      if (tag == kZIP64_EXTENDED_MAGIC) {
         Long64_t usize = Get64(buf + off + kZIP64_EXTENDED_USIZE_OFF,      kZIP64_EXTENDED_USIZE_LEN);
         Long64_t csize = Get64(buf + off + kZIP64_EXTENTED_CSIZE_OFF,      kZIP64_EXTENDED_CSIZE_LEN);
         m->fDsize = usize;
         m->fCsize = csize;
         if (size >= 24) {
            Long64_t offset = Get64(buf + off + kZIP64_EXTENDED_HDR_OFFSET_OFF, kZIP64_EXTENDED_HDR_OFFSET_LEN);
            m->fPosition = offset;
         }
 
         ret = 0;
      }
      len -= (Int_t)size + kZIP64_EXTENDED_MAGIC_LEN + kZIP64_EXTENDED_MAGIC_LEN;
      off += (Int_t)size + kZIP64_EXTENDED_MAGIC_LEN + kZIP64_EXTENDED_MAGIC_LEN;
   }
 
   return ret;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Find the desired member in the member array and make it the
/// current member. Returns -1 in case member is not found, 0 otherwise.
 
Int_t TZIPFile::SetCurrentMember()
{
   fCurMember = 0;
 
   if (fMemberIndex > -1) {
      fCurMember = (TZIPMember *) fMembers->At(fMemberIndex);
      if (!fCurMember)
         return -1;
      fMemberName = fCurMember->GetName();
   } else {
      for (int i = 0; i < fMembers->GetEntriesFast(); i++) {
         TZIPMember *m = (TZIPMember *) fMembers->At(i);
         if (fMemberName == m->fName) {
            fCurMember   = m;
            fMemberIndex = i;
            break;
         }
      }
      if (!fCurMember)
         return -1;
   }
 
   return ReadMemberHeader((TZIPMember *)fCurMember);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Read a "bytes" long little-endian integer value from "buffer".
 
UInt_t TZIPFile::Get(const void *buffer, Int_t bytes)
{
   UInt_t value = 0;
 
   if (bytes > 4) {
      Error("Get", "can not read > 4 byte integers, use Get64");
      return value;
   }
#ifdef R__BYTESWAP
   memcpy(&value, buffer, bytes);
#else
   const UChar_t *buf = static_cast<const unsigned char *>(buffer);
   for (UInt_t shift = 0; bytes; shift += 8, --bytes, ++buf)
      value += *buf << shift;
#endif
   return value;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Read a 8 byte long little-endian integer value from "buffer".
 
ULong64_t TZIPFile::Get64(const void *buffer, Int_t bytes)
{
   ULong64_t value = 0;
 
   if (bytes != 8) {
      Error("Get64", "bytes must be 8 (asked for %d)", bytes);
      return value;
   }
 
#ifdef R__BYTESWAP
   memcpy(&value, buffer, bytes);
#else
   const UChar_t *buf = static_cast<const unsigned char *>(buffer);
   for (UInt_t shift = 0; bytes; shift += 8, --bytes, ++buf)
      value += *buf << shift;
#endif
   return value;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Pretty print ZIP archive members.
 
void TZIPFile::Print(Option_t *) const
{
   if (fMembers)
      fMembers->Print();
}
 
 
ClassImp(TZIPMember);
 
////////////////////////////////////////////////////////////////////////////////
/// Default ctor.
 
TZIPMember::TZIPMember()
{
   fLocal     = 0;
   fLocalLen  = 0;
   fGlobal    = 0;
   fGlobalLen = 0;
   fCRC32     = 0;
   fAttrInt   = 0;
   fAttrExt   = 0;
   fMethod    = 0;
   fLevel     = 0;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Create ZIP member file.
 
TZIPMember::TZIPMember(const char *name)
   : TArchiveMember(name)
{
   fLocal     = 0;
   fLocalLen  = 0;
   fGlobal    = 0;
   fGlobalLen = 0;
   fCRC32     = 0;
   fAttrInt   = 0;
   fAttrExt   = 0;
   fMethod    = 0;
   fLevel     = 0;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Copy ctor.
 
TZIPMember::TZIPMember(const TZIPMember &member)
   : TArchiveMember(member)
{
   fLocal     = 0;
   fLocalLen  = member.fLocalLen;
   fGlobal    = 0;
   fGlobalLen = member.fGlobalLen;
   fCRC32     = member.fCRC32;
   fAttrInt   = member.fAttrInt;
   fAttrExt   = member.fAttrExt;
   fMethod    = member.fMethod;
   fLevel     = member.fLevel;
 
   if (member.fLocal) {
      fLocal = new char [fLocalLen];
      memcpy(fLocal, member.fLocal, fLocalLen);
   }
   if (member.fGlobal) {
      fGlobal = new char [fGlobalLen];
      memcpy(fGlobal, member.fGlobal, fGlobalLen);
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Assignment operator.
 
TZIPMember &TZIPMember::operator=(const TZIPMember &rhs)
{
   if (this != &rhs) {
      TArchiveMember::operator=(rhs);
 
      delete [] (char*) fLocal;
      delete [] (char*) fGlobal;
 
      fLocal     = 0;
      fLocalLen  = rhs.fLocalLen;
      fGlobal    = 0;
      fGlobalLen = rhs.fGlobalLen;
      fCRC32     = rhs.fCRC32;
      fAttrInt   = rhs.fAttrInt;
      fAttrExt   = rhs.fAttrExt;
      fMethod    = rhs.fMethod;
      fLevel     = rhs.fLevel;
 
      if (rhs.fLocal) {
         fLocal = new char [fLocalLen];
         memcpy(fLocal, rhs.fLocal, fLocalLen);
      }
      if (rhs.fGlobal) {
         fGlobal = new char [fGlobalLen];
         memcpy(fGlobal, rhs.fGlobal, fGlobalLen);
      }
   }
   return *this;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Cleanup.
 
TZIPMember::~TZIPMember()
{
   delete [] (char*) fLocal;
   delete [] (char*) fGlobal;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Pretty print basic ZIP member info.
 
void TZIPMember::Print(Option_t *) const
{
   printf("%-20lld", fDsize);
   printf(" %s   %s\n", fModTime.AsSQLString(), fName.Data());
}