library: libCore
#include "TZIPFile.h" |
TZIPFile
class description - source file - inheritance tree (.pdf)
protected:
Long64_t FindEndHeader()
UInt_t Get(const void* buffer, Int_t bytes)
Int_t ReadDirectory()
Int_t ReadEndHeader(Long64_t pos)
Int_t ReadMemberHeader(TZIPMember* member)
public:
TZIPFile()
TZIPFile(const char* archive, const char* member, TFile* file)
TZIPFile(const TZIPFile&)
virtual ~TZIPFile()
static TClass* Class()
virtual TClass* IsA() const
virtual Int_t OpenArchive()
TZIPFile& operator=(const TZIPFile&)
virtual void Print(Option_t* option = "") const
virtual Int_t SetCurrentMember()
virtual void ShowMembers(TMemberInspector& insp, char* parent)
virtual void Streamer(TBuffer& b)
void StreamerNVirtual(TBuffer& b)
protected:
Long64_t fDirPos Central directory position
Long64_t fDirSize Central directory size
Long64_t fDirOffset Central directory offset (from the beginning of the archive)
TString fComment Archive comment
public:
static const TZIPFile::EZIPConstants kARCHIVE_VERSION
static const TZIPFile::EZIPConstants kDIR_HEADER_MAGIC
static const TZIPFile::EZIPConstants kENTRY_HEADER_MAGIC
static const TZIPFile::EZIPConstants kEND_HEADER_MAGIC
static const TZIPFile::EZIPConstants kZIP_MAGIC_LEN
static const TZIPFile::EZIPConstants kMAX_VAR_LEN
static const TZIPFile::EZIPConstants kMAX_SIZE
static const TZIPFile::EZIPConstants kDIR_MAGIC_OFF
static const TZIPFile::EZIPConstants kDIR_VMADE_OFF
static const TZIPFile::EZIPConstants kDIR_VMADE_LEN
static const TZIPFile::EZIPConstants kDIR_VREQD_OFF
static const TZIPFile::EZIPConstants kDIR_VREQD_LEN
static const TZIPFile::EZIPConstants kDIR_FLAG_OFF
static const TZIPFile::EZIPConstants kDIR_FLAG_LEN
static const TZIPFile::EZIPConstants kDIR_METHOD_OFF
static const TZIPFile::EZIPConstants kDIR_METHOD_LEN
static const TZIPFile::EZIPConstants kDIR_DATE_OFF
static const TZIPFile::EZIPConstants kDIR_DATE_LEN
static const TZIPFile::EZIPConstants kDIR_CRC32_OFF
static const TZIPFile::EZIPConstants kDIR_CRC32_LEN
static const TZIPFile::EZIPConstants kDIR_CSIZE_OFF
static const TZIPFile::EZIPConstants kDIR_CSIZE_LEN
static const TZIPFile::EZIPConstants kDIR_USIZE_OFF
static const TZIPFile::EZIPConstants kDIR_USIZE_LEN
static const TZIPFile::EZIPConstants kDIR_NAMELEN_OFF
static const TZIPFile::EZIPConstants kDIR_NAMELEN_LEN
static const TZIPFile::EZIPConstants kDIR_EXTRALEN_OFF
static const TZIPFile::EZIPConstants kDIR_EXTRALEN_LEN
static const TZIPFile::EZIPConstants kDIR_COMMENTLEN_OFF
static const TZIPFile::EZIPConstants kDIR_COMMENTLEN_LEN
static const TZIPFile::EZIPConstants kDIR_DISK_START_OFF
static const TZIPFile::EZIPConstants kDIR_DISK_START_LEN
static const TZIPFile::EZIPConstants kDIR_INT_ATTR_OFF
static const TZIPFile::EZIPConstants kDIR_INT_ATTR_LEN
static const TZIPFile::EZIPConstants kDIR_EXT_ATTR_OFF
static const TZIPFile::EZIPConstants kDIR_EXT_ATTR_LEN
static const TZIPFile::EZIPConstants kDIR_ENTRY_POS_OFF
static const TZIPFile::EZIPConstants kDIR_ENTRY_POS_LEN
static const TZIPFile::EZIPConstants kDIR_HEADER_SIZE
static const TZIPFile::EZIPConstants kEND_MAGIC_OFF
static const TZIPFile::EZIPConstants kEND_DISK_OFF
static const TZIPFile::EZIPConstants kEND_DISK_LEN
static const TZIPFile::EZIPConstants kEND_DIR_DISK_OFF
static const TZIPFile::EZIPConstants kEND_DIR_DISK_LEN
static const TZIPFile::EZIPConstants kEND_DISK_HDRS_OFF
static const TZIPFile::EZIPConstants kEND_DISK_HDRS_LEN
static const TZIPFile::EZIPConstants kEND_TOTAL_HDRS_OFF
static const TZIPFile::EZIPConstants kEND_TOTAL_HDRS_LEN
static const TZIPFile::EZIPConstants kEND_DIR_SIZE_OFF
static const TZIPFile::EZIPConstants kEND_DIR_SIZE_LEN
static const TZIPFile::EZIPConstants kEND_DIR_OFFSET_OFF
static const TZIPFile::EZIPConstants kEND_DIR_OFFSET_LEN
static const TZIPFile::EZIPConstants kEND_COMMENTLEN_OFF
static const TZIPFile::EZIPConstants kEND_COMMENTLEN_LEN
static const TZIPFile::EZIPConstants kEND_HEADER_SIZE
static const TZIPFile::EZIPConstants kENTRY_MAGIC_OFF
static const TZIPFile::EZIPConstants kENTRY_VREQD_OFF
static const TZIPFile::EZIPConstants kENTRY_VREQD_LEN
static const TZIPFile::EZIPConstants kENTRY_FLAG_OFF
static const TZIPFile::EZIPConstants kENTRY_FLAG_LEN
static const TZIPFile::EZIPConstants kENTRY_METHOD_OFF
static const TZIPFile::EZIPConstants kENTRY_METHOD_LEN
static const TZIPFile::EZIPConstants kENTRY_DATE_OFF
static const TZIPFile::EZIPConstants kENTRY_DATE_LEN
static const TZIPFile::EZIPConstants kENTRY_CRC32_OFF
static const TZIPFile::EZIPConstants kENTRY_CRC32_LEN
static const TZIPFile::EZIPConstants kENTRY_CSIZE_OFF
static const TZIPFile::EZIPConstants kENTRY_CSIZE_LEN
static const TZIPFile::EZIPConstants kENTRY_USIZE_OFF
static const TZIPFile::EZIPConstants kENTRY_USIZE_LEN
static const TZIPFile::EZIPConstants kENTRY_NAMELEN_OFF
static const TZIPFile::EZIPConstants kENTRY_NAMELEN_LEN
static const TZIPFile::EZIPConstants kENTRY_EXTRALEN_OFF
static const TZIPFile::EZIPConstants kENTRY_EXTRALEN_LEN
static const TZIPFile::EZIPConstants kENTRY_HEADER_SIZE
static const TZIPFile::EZIPConstants kSTORED
static const TZIPFile::EZIPConstants kDEFLATED
TZIPFile
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 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.
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.
TZIPFile() : TArchiveFile()
Default ctor.
TZIPFile(const char *archive, const char *member, TFile *file)
: TArchiveFile(archive, member, file)
Specify the archive name and member name. The member can be a decimal
number which allows to access the n-th member.
Int_t OpenArchive()
Open archive and read end-header and directory. Returns -1 in case
of error, 0 otherwise.
Long64_t FindEndHeader()
Find the end header of the ZIP archive. Returns 0 in case of error.
Int_t ReadEndHeader(Long64_t pos)
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 ReadDirectory()
Read the directory of the ZIP archive. Returns -1 in case of error,
0 otherwise.
Int_t ReadMemberHeader(TZIPMember *member)
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 SetCurrentMember()
Find the desired member in the member array and make it the
current member. Returns -1 in case member is not found, 0 otherwise.
UInt_t Get(const void *buffer, Int_t bytes)
Read a "bytes" long little-endian integer value from "buffer".
void Print(Option_t *) const
Pretty print ZIP archive members.
Inline Functions
void ~TZIPFile()
TClass* Class()
TClass* IsA() const
void ShowMembers(TMemberInspector& insp, char* parent)
void Streamer(TBuffer& b)
void StreamerNVirtual(TBuffer& b)
TZIPFile TZIPFile(const TZIPFile&)
TZIPFile& operator=(const TZIPFile&)
Author: Fons Rademakers and Lassi Tuura 30/6/04
Last update: root/base:$Name: $:$Id: TZIPFile.cxx,v 1.5 2005/05/16 21:40:30 rdm Exp $
Copyright (C) 1995-2004, Rene Brun and Fons Rademakers. *
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