src/libhapack.h

   1 /***********************************************************************
   2  * This file is part of HA, a general purpose file archiver.
   3  * Copyright (C) 1995 Harri Hirvola
   4  * Modified by Ketmar // Invisible Vector
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  ***********************************************************************/
  20 #ifndef LIBHAPACK_H
  21 #define LIBHAPACK_H
  22
  23 #ifdef __cplusplus
  24 extern "C" {
  25 #endif
  26
  27
  28 /******************************************************************************/
  29 enum {
  30   LIBHA_ERR_OK = 0,
  31   LIBHA_ERR_READ = -1,
  32   LIBHA_ERR_WRITE = -2,
  33   LIBHA_ERR_BAD_DATA = -3
  34 };
  35
  36
  37 /******************************************************************************/
  38 typedef struct libha_io_s {
  39   int (*bread) (void *buf, int buf_len, void *udata); /* return number of bytes read; 0: EOF; <0: error; can be less than buf_len */
  40   int (*bwrite) (const void *buf, int buf_len, void *udata); /* result != buf_len: error */
  41 } libha_io_t;
  42
  43
  44 /******************************************************************************/
  45 typedef struct libha_s *libha_t;
  46
  47
  48 extern libha_t libha_alloc (const libha_io_t *iot, void *udata);
  49 extern void libha_free (libha_t asc);
  50
  51 extern const libha_io_t *libha_get_iot (libha_t asc);
  52 extern int libha_set_iot (libha_t asc, const libha_io_t *iot); /* <0: error; 0: ok */
  53
  54 extern void *libha_get_udata (libha_t asc);
  55 extern int libha_set_udata (libha_t asc, void *udata); /* <0: error; 0: ok */
  56
  57 /* you need to set i/o structure before calling pack or unpack */
  58 extern int libha_pack (libha_t asc); /* LIBHA_ERR_xxx */
  59
  60
  61 #ifdef __cplusplus
  62 }
  63 #endif
  64 #endif