ROOT logo
ROOT » IO » IO » TZIPMember

class TZIPMember: public TArchiveMember


This class 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

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.

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.

Function Members (Methods)

TZIPMember(const char* name)
TZIPMember(const TZIPMember& member)
voidTObject::AbstractMethod(const char* method) const
virtual voidTObject::AppendPad(Option_t* option = "")
virtual voidTObject::Browse(TBrowser* b)
static TClass*Class()
virtual const char*TObject::ClassName() const
virtual voidTObject::Clear(Option_t* = "")
virtual TObject*TObject::Clone(const char* newname = "") const
virtual Int_tTObject::Compare(const TObject* obj) const
virtual voidTObject::Copy(TObject& object) const
virtual voidTObject::Delete(Option_t* option = "")MENU
virtual Int_tTObject::DistancetoPrimitive(Int_t px, Int_t py)
virtual voidTObject::Draw(Option_t* option = "")
virtual voidTObject::DrawClass() constMENU
virtual TObject*TObject::DrawClone(Option_t* option = "") constMENU
virtual voidTObject::Dump() constMENU
virtual voidTObject::Error(const char* method, const char* msgfmt) const
virtual voidTObject::Execute(const char* method, const char* params, Int_t* error = 0)
virtual voidTObject::Execute(TMethod* method, TObjArray* params, Int_t* error = 0)
virtual voidTObject::ExecuteEvent(Int_t event, Int_t px, Int_t py)
virtual voidTObject::Fatal(const char* method, const char* msgfmt) const
virtual TObject*TObject::FindObject(const char* name) const
virtual TObject*TObject::FindObject(const TObject* obj) const
UInt_tGetAttrExt() const
UInt_tGetAttrInt() const
const char*TArchiveMember::GetComment() const
Long64_tTArchiveMember::GetCompressedSize() const
UInt_tGetCRC32() const
Long64_tTArchiveMember::GetDecompressedSize() const
virtual Option_t*TObject::GetDrawOption() const
static Long_tTObject::GetDtorOnly()
Long64_tTArchiveMember::GetFilePosition() const
void*GetGlobal() const
Long64_tGetGlobalLen() const
virtual const char*TObject::GetIconName() const
UInt_tGetLevel() const
void*GetLocal() const
Long64_tGetLocalLen() const
UInt_tGetMethod() const
TDatimeTArchiveMember::GetModTime() const
virtual const char*TArchiveMember::GetName() const
virtual char*TObject::GetObjectInfo(Int_t px, Int_t py) const
static Bool_tTObject::GetObjectStat()
virtual Option_t*TObject::GetOption() const
Long64_tTArchiveMember::GetPosition() const
virtual const char*TObject::GetTitle() const
virtual UInt_tTObject::GetUniqueID() const
virtual Bool_tTObject::HandleTimer(TTimer* timer)
virtual ULong_tTObject::Hash() const
virtual voidTObject::Info(const char* method, const char* msgfmt) const
virtual Bool_tTObject::InheritsFrom(const char* classname) const
virtual Bool_tTObject::InheritsFrom(const TClass* cl) const
virtual voidTObject::Inspect() constMENU
voidTObject::InvertBit(UInt_t f)
virtual TClass*IsA() const
Bool_tTArchiveMember::IsDirectory() const
virtual Bool_tTObject::IsEqual(const TObject* obj) const
virtual Bool_tTObject::IsFolder() const
Bool_tTObject::IsOnHeap() const
virtual Bool_tTObject::IsSortable() const
Bool_tTObject::IsZombie() const
virtual voidTObject::ls(Option_t* option = "") const
voidTObject::MayNotUse(const char* method) const
virtual Bool_tTObject::Notify()
static voidTObject::operator delete(void* ptr)
static voidTObject::operator delete(void* ptr, void* vp)
static voidTObject::operator delete[](void* ptr)
static voidTObject::operator delete[](void* ptr, void* vp)
void*TObject::operator new(size_t sz)
void*TObject::operator new(size_t sz, void* vp)
void*TObject::operator new[](size_t sz)
void*TObject::operator new[](size_t sz, void* vp)
TZIPMember&operator=(const TZIPMember& rhs)
virtual voidTObject::Paint(Option_t* option = "")
virtual voidTObject::Pop()
virtual voidPrint(Option_t* option = "") const
virtual Int_tTObject::Read(const char* name)
virtual voidTObject::RecursiveRemove(TObject* obj)
voidTObject::ResetBit(UInt_t f)
virtual voidTObject::SaveAs(const char* filename = "", Option_t* option = "") constMENU
virtual voidTObject::SavePrimitive(basic_ostream<char,char_traits<char> >& out, Option_t* option = "")
voidTObject::SetBit(UInt_t f)
voidTObject::SetBit(UInt_t f, Bool_t set)
virtual voidTObject::SetDrawOption(Option_t* option = "")MENU
static voidTObject::SetDtorOnly(void* obj)
static voidTObject::SetObjectStat(Bool_t stat)
virtual voidTObject::SetUniqueID(UInt_t uid)
virtual voidShowMembers(TMemberInspector& insp, char* parent)
virtual voidStreamer(TBuffer& b)
voidStreamerNVirtual(TBuffer& b)
virtual voidTObject::SysError(const char* method, const char* msgfmt) const
Bool_tTObject::TestBit(UInt_t f) const
Int_tTObject::TestBits(UInt_t f) const
virtual voidTObject::UseCurrentStyle()
virtual voidTObject::Warning(const char* method, const char* msgfmt) const
virtual Int_tTObject::Write(const char* name = 0, Int_t option = 0, Int_t bufsize = 0)
virtual Int_tTObject::Write(const char* name = 0, Int_t option = 0, Int_t bufsize = 0) const
virtual voidTObject::DoError(int level, const char* location, const char* fmt, va_list va) const

Data Members

TStringTArchiveMember::fCommentComment field
Long64_tTArchiveMember::fCsizeCompressed size
Bool_tTArchiveMember::fDirectoryFlag indicating this is a directory
Long64_tTArchiveMember::fDsizeDecompressed size
Long64_tTArchiveMember::fFilePositionByte position in archive where member data starts
TDatimeTArchiveMember::fModTimeModification time
TStringTArchiveMember::fNameName of member
Long64_tTArchiveMember::fPositionByte position in archive
UInt_tfAttrExtExternal file attributes
UInt_tfAttrIntInternal file attributes
UInt_tfCRC32CRC-32 for all decompressed data
void*fGlobalExtra directory data
Long64_tfGlobalLenLength of extra directory data
UInt_tfLevelCompression level
void*fLocalExtra file header data
Long64_tfLocalLenLength of extra file header data
UInt_tfMethodCompression type

Class Charts

Inheritance Inherited Members Includes Libraries
Class Charts

Function documentation

 Default ctor.
TZIPMember(const char *name)
 Create ZIP member file.
TZIPMember(const TZIPMember &member)
 Copy ctor.
TZIPMember & operator=(const TZIPMember& rhs)
 Assignment operator.
void Print(Option_t* option = "") const
 Pretty print basic ZIP member info.
void * GetLocal() const
{ return fLocal; }
Long64_t GetLocalLen() const
{ return fLocalLen; }
void * GetGlobal() const
{ return fGlobal; }
Long64_t GetGlobalLen() const
{ return fGlobalLen; }
UInt_t GetCRC32() const
{ return fCRC32; }
UInt_t GetAttrInt() const
{ return fAttrInt; }
UInt_t GetAttrExt() const
{ return fAttrExt; }
UInt_t GetMethod() const
{ return fMethod; }
UInt_t GetLevel() const
{ return fLevel; }