Logo ROOT   6.30.04
Reference Guide
 All Namespaces Files Pages
TArchiveFile.h
Go to the documentation of this file.
1 // @(#)root/io:$Id$
2 // Author: Fons Rademakers 30/6/04
3 
4 /*************************************************************************
5  * Copyright (C) 1995-2004, Rene Brun and Fons Rademakers. *
6  * All rights reserved. *
7  * *
8  * For the licensing terms see $ROOTSYS/LICENSE. *
9  * For the list of contributors see $ROOTSYS/README/CREDITS. *
10  *************************************************************************/
11 
12 #ifndef ROOT_TArchiveFile
13 #define ROOT_TArchiveFile
14 
15 #include "TObject.h"
16 #include "TString.h"
17 #include "TDatime.h"
18 
19 class TFile;
20 class TArchiveMember;
21 class TObjArray;
22 
23 
24 class TArchiveFile : public TObject {
25 
26 private:
27  TArchiveFile(const TArchiveFile&) = delete; ///< Not implemented because TArchiveFile can not be copied.
28  TArchiveFile& operator=(const TArchiveFile&) = delete; ///< Not implemented because TArchiveFile can not be copied.
29 
30 protected:
31  TString fArchiveName; ///< Archive file name
32  TString fMemberName; ///< Sub-file name
33  Int_t fMemberIndex; ///< Index of sub-file in archive
34  TFile *fFile; ///< File stream used to access the archive
35  TObjArray *fMembers; ///< Members in this archive
36  TArchiveMember *fCurMember; ///< Current archive member
37 
38  static Bool_t ParseUrl(const char *url, TString &archive, TString &member, TString &type);
39 
40 public:
41  TArchiveFile() : fArchiveName(""), fMemberName(""), fMemberIndex(-1), fFile(0), fMembers(0), fCurMember(0) { }
42  TArchiveFile(const char *archive, const char *member, TFile *file);
43  virtual ~TArchiveFile();
44 
45  virtual Int_t OpenArchive() = 0;
46  virtual Int_t SetCurrentMember() = 0;
47  virtual Int_t SetMember(const char *member);
48  virtual Int_t SetMember(Int_t idx);
49 
50  Long64_t GetMemberFilePosition() const;
51  TArchiveMember *GetMember() const { return fCurMember; }
52  TObjArray *GetMembers() const { return fMembers; }
53  Int_t GetNumberOfMembers() const;
54 
55  const char *GetArchiveName() const { return fArchiveName; }
56  const char *GetMemberName() const { return fMemberName; }
57  Int_t GetMemberIndex() const { return fMemberIndex; }
58 
59  static TArchiveFile *Open(const char *url, TFile *file);
60 
61  ClassDef(TArchiveFile,1) //An archive file containing multiple sub-files (like a ZIP archive)
62 };
63 
64 
65 class TArchiveMember : public TObject {
66 
67 friend class TArchiveFile;
68 
69 protected:
70  TString fName; ///< Name of member
71  TString fComment; ///< Comment field
72  TDatime fModTime; ///< Modification time
73  Long64_t fPosition; ///< Byte position in archive
74  Long64_t fFilePosition; ///< Byte position in archive where member data starts
75  Long64_t fCsize; ///< Compressed size
76  Long64_t fDsize; ///< Decompressed size
77  Bool_t fDirectory; ///< Flag indicating this is a directory
78 
79 public:
80  TArchiveMember();
81  TArchiveMember(const char *name);
82  TArchiveMember(const TArchiveMember &member);
83  TArchiveMember &operator=(const TArchiveMember &rhs);
84  virtual ~TArchiveMember() { }
85 
86  const char *GetName() const { return fName; }
87  const char *GetComment() const { return fComment; }
88  TDatime GetModTime() const { return fModTime; }
89  Long64_t GetPosition() const { return fPosition; }
90  Long64_t GetFilePosition() const { return fFilePosition; }
91  Long64_t GetCompressedSize() const { return fCsize; }
92  Long64_t GetDecompressedSize() const { return fDsize; }
93  Bool_t IsDirectory() const { return fDirectory; }
94 
95  ClassDef(TArchiveMember,1) //An archive member file
96 };
97 
98 #endif