io_stream_file.h

   1 /*
   2  * Copyright (c) 2001, Robert Collins.
   3  *
   4  *     This program is free software; you can redistribute it and/or modify
   5  *     it under the terms of the GNU General Public License as published by
   6  *     the Free Software Foundation; either version 2 of the License, or
   7  *     (at your option) any later version.
   8  *
   9  *     A copy of the GNU General Public License can be found at
  10  *     http://www.gnu.org/
  11  *
  12  * Written by Robert Collins  <rbtcollins@hotmail.com>
  13  *
  14  */
  15
  16 #ifndef _IO_STREAM_FILE_H_
  17 #define _IO_STREAM_FILE_H_
  18
  19 #include "io_stream.h"
  20 #include "String++.h"
  21
  22 /* io_stream on disk files
  23  */
  24
  25 class io_stream_file:public io_stream
  26 {
  27 public:
  28   static int exists (String const &);
  29   static int remove (String const &);
  30   static int mklink (String const &, String const &, io_stream_link_t);
  31     io_stream_file (String const &,String const &);
  32     virtual ~ io_stream_file ();
  33   /* read data (duh!) */
  34   virtual ssize_t read (void *buffer, size_t len);
  35   /* provide data to (double duh!) */
  36   virtual ssize_t write (const void *buffer, size_t len);
  37   /* read data without removing it from the class's internal buffer */
  38   virtual ssize_t peek (void *buffer, size_t len);
  39   virtual long tell ();
  40   virtual int seek (long where, io_stream_seek_t whence);
  41   /* can't guess, oh well */
  42   virtual int error ();
  43   virtual int set_mtime (int);
  44   /* not relevant yet */
  45   virtual int get_mtime ()
  46   {
  47     return 0;
  48   };
  49   virtual size_t get_size ();
  50   static int move (String const &,String const &);
  51 private:
  52   /* always require parameters */
  53   io_stream_file ()
  54   {
  55   };
  56   FILE *fp;
  57   int lasterr;
  58   String fname;
  59   String lmode;
  60 };
  61
  62 #endif /* _IO_STREAM_FILE_H_ */