libaudiofile/af_vfs.h

   1 /*
   2         Audio File Library
   3         Copyright (C) 1999, Elliot Lee <sopwith@redhat.com>
   4
   5         This library is free software; you can redistribute it and/or
   6         modify it under the terms of the GNU Library General Public
   7         License as published by the Free Software Foundation; either
   8         version 2 of the License, or (at your option) any later version.
   9
  10         This library is distributed in the hope that it will be useful,
  11         but WITHOUT ANY WARRANTY; without even the implied warranty of
  12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13         Library General Public License for more details.
  14
  15         You should have received a copy of the GNU Library General Public
  16         License along with this library; if not, write to the
  17         Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18         Boston, MA  02111-1307  USA.
  19 */
  20
  21 /*
  22         af_vfs.h
  23
  24         Virtual file operations for the Audio File Library.
  25 */
  26
  27 #ifndef AUDIOFILE_VFS_H
  28 #define AUDIOFILE_VFS_H 1
  29
  30 #include <stdio.h>
  31 #include <audiofile.h>
  32
  33 #ifdef __cplusplus
  34 extern "C" {
  35 #endif
  36
  37 struct _AFvirtualfile
  38 {
  39   ssize_t (*read) (AFvirtualfile *vfile, void *data, size_t nbytes);
  40   long (*length) (AFvirtualfile *vfile);
  41   ssize_t (*write) (AFvirtualfile *vfile, const void *data, size_t nbytes);
  42   void (*destroy)(AFvirtualfile *vfile);
  43   long (*seek)   (AFvirtualfile *vfile, long offset, int is_relative);
  44   long (*tell)   (AFvirtualfile *vfile);
  45
  46   void *closure;
  47 };
  48
  49 AFvirtualfile *af_virtual_file_new (void);
  50 AFvirtualfile *af_virtual_file_new_for_file (FILE *fh);
  51 void af_virtual_file_destroy (AFvirtualfile *vfile);
  52
  53 size_t af_fread (void *data, size_t size, size_t nmemb, AFvirtualfile *vfile);
  54 size_t af_fwrite (const void *data, size_t size, size_t nmemb, AFvirtualfile *vfile);
  55 int af_fclose (AFvirtualfile *vfile);
  56 long af_flength (AFvirtualfile *vfile);
  57 int af_fseek (AFvirtualfile *vfile, long offset, int whence);
  58 long af_ftell (AFvirtualfile *vfile);
  59
  60 #ifdef __cplusplus
  61 }
  62 #endif
  63
  64 #endif