src/system/boot/loader/file_systems/bfs/Stream.h

   1 /* Stream - inode stream access functions
   2 **
   3 ** Copyright 2003-2004, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
   4 ** Distributed under the terms of the MIT License.
   5 */
   6 #ifndef STREAM_H
   7 #define STREAM_H
   8
   9
  10 #include "Volume.h"
  11
  12 #include <sys/stat.h>
  13
  14 class Node;
  15
  16
  17 namespace BFS {
  18
  19 class Stream : public bfs_inode {
  20         public:
  21                 Stream(Volume &volume, block_run run);
  22                 Stream(Volume &volume, off_t id);
  23                 ~Stream();
  24
  25                 status_t InitCheck();
  26                 Volume &GetVolume() const { return fVolume; }
  27
  28                 status_t FindBlockRun(off_t pos, block_run &run, off_t &offset);
  29                 status_t ReadAt(off_t pos, uint8 *buffer, size_t *length);
  30
  31                 status_t GetName(char *name, size_t size) const;
  32                 off_t Size() const { return data.Size(); }
  33                 off_t ID() const { return fVolume.ToVnode(inode_num); }
  34                 status_t ReadLink(char *buffer, size_t bufferSize);
  35
  36                 bool IsContainer() const { return Mode() & (S_IFDIR | S_INDEX_DIR | S_ATTR_DIR); }
  37                 bool IsSymlink() const { return S_ISLNK(Mode()); }
  38                 bool IsIndex() const { return false; }
  39
  40                 static Node *NodeFactory(Volume &volume, off_t id);
  41
  42         private:
  43                 status_t GetNextSmallData(const small_data **_smallData) const;
  44
  45                 Volume  &fVolume;
  46 };
  47
  48 }       // namespace BFS
  49
  50 #endif  /* STREAM_H */