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
  20 /* io_stream on disk files
  21  */
  22
  23 class io_stream_file:public io_stream
  24 {
  25 public:
  26   static int exists (const char *);
  27   static int remove (const char *);
  28   static int mklink (const char *, const char *, io_stream_link_t);
  29     io_stream_file (const char *, const char *);
  30     virtual ~ io_stream_file ();
  31   /* read data (duh!) */
  32   virtual ssize_t read (void *buffer, size_t len);
  33   /* provide data to (double duh!) */
  34   virtual ssize_t write (const void *buffer, size_t len);
  35   /* read data without removing it from the class's internal buffer */
  36   virtual ssize_t peek (void *buffer, size_t len);
  37   virtual long tell ();
  38   virtual int seek (long where, io_stream_seek_t whence);
  39   /* can't guess, oh well */
  40   virtual int error ();
  41   virtual int set_mtime (int);
  42   /* not relevant yet */
  43   virtual int get_mtime ()
  44   {
  45     return 0;
  46   };
  47   /* dummy for io_stream_file */
  48   virtual const char *next_file_name ()
  49   {
  50     return NULL;
  51   };
  52   static int move (char const *, char const *);
  53 private:
  54   /* always require parameters */
  55   io_stream_file ()
  56   {
  57   };
  58   FILE *fp;
  59   int lasterr;
  60   char *fname;
  61   char *lmode;
  62 };
  63
  64 #endif /* _IO_STREAM_FILE_H_ */