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RRawFileWin.hxx
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1// @(#)root/io:$Id$
2// Author: Jakob Blomer
3
4/*************************************************************************
5 * Copyright (C) 1995-2018, 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_RRawFileWin
13#define ROOT_RRawFileWin
14
15#include <ROOT/RRawFile.hxx>
16#include <string_view>
17
18#include <cstddef>
19#include <cstdint>
20#include <cstdio>
21
22namespace ROOT {
23namespace Internal {
24
25/**
26 * \class RRawFileWin RRawFileWin.hxx
27 * \ingroup IO
28 *
29 * The RRawFileWin class uses portable C I/O calls to read from a drive. The standard C I/O buffering is turned off
30 * for the buffering of RRawFile base class.
31 */
32class RRawFileWin : public RRawFile {
33private:
34 FILE *fFilePtr = nullptr;
35 void Seek(long offset, int whence);
36
37protected:
38 void OpenImpl() final;
39 size_t ReadAtImpl(void *buffer, size_t nbytes, std::uint64_t offset) final;
40 std::uint64_t GetSizeImpl() final;
41
42public:
43 RRawFileWin(std::string_view url, RRawFile::ROptions options);
44 ~RRawFileWin() override;
45 std::unique_ptr<RRawFile> Clone() const final;
46};
47
48} // namespace Internal
49} // namespace ROOT
50
51#endif
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t WindowAttributes_t Float_t Float_t Float_t Int_t Int_t UInt_t UInt_t Rectangle_t Int_t Int_t Window_t TString Int_t GCValues_t GetPrimarySelectionOwner GetDisplay GetScreen GetColormap GetNativeEvent const char const char dpyName wid window const char font_name cursor keysym reg const char only_if_exist regb h Point_t winding char text const char depth char const char Int_t count const char ColorStruct_t color const char Pixmap_t Pixmap_t PictureAttributes_t attr const char char ret_data h unsigned char height h offset
The RRawFileWin class uses portable C I/O calls to read from a drive.
size_t ReadAtImpl(void *buffer, size_t nbytes, std::uint64_t offset) final
Derived classes should implement low-level reading without buffering.
std::unique_ptr< RRawFile > Clone() const final
Create a new RawFile that accesses the same resource. The file pointer is reset to zero.
std::uint64_t GetSizeImpl() final
Derived classes should return the file size.
void Seek(long offset, int whence)
void OpenImpl() final
OpenImpl() is called at most once and before any call to either DoReadAt or DoGetSize.
The RRawFile provides read-only access to local and remote files.
Definition RRawFile.hxx:43
tbb::task_arena is an alias of tbb::interface7::task_arena, which doesn't allow to forward declare tb...
On construction, an ROptions parameter can customize the RRawFile behavior.
Definition RRawFile.hxx:49