mfs.h

#ifndef MFS_TIM_H
#define MFS_TIM_H

/**
--------------------------------------------------------------------------------
-   Module      :   mfs.cpp
-   Description :   A general purpose library for manipulating a memory area
-                   as if it were a file.
-                   mfs_ stands for memory file system.
-   Author      :   Mike Johnson - Banctec AB 03/07/96
-   Adaptations :   Tim Zaman - Picturae, Pixelprisma, 06/05/2015
--------------------------------------------------------------------------------
-   Copyright (c) 1996 Mike Johnson
-   Copyright (c) 1996 BancTec AB
-   
-   Permission to use, copy, modify, distribute, and sell this software
-   for any purpose is hereby granted without fee, provided
-   that (i) the above copyright notices and this permission notice appear in
-   all copies of the software and related documentation, and (ii) the names of
-   Mike Johnson and BancTec may not be used in any advertising or
-   publicity relating to the software.
-   
-   THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
-   EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
-   WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
-   
-   Additions: Eric Bruneton, Antoine Begault, Guillaume Piolat, Tim Zaman
--------------------------------------------------------------------------------
*/

typedef struct {
    char *buf = NULL;        /* Memory for open buf */
    long  buf_off;    /* File pointer for each buf */
    long  buf_size = 0;   /* Count of bytes allocated for each buf */
    int   buf_mode;   /* Mode of buffer (r, w, a) */
    bool  buf_open;
} mfs_file;

int mfs_open (void *ptr, int size, char *mode, mfs_file *fd);
int mfs_lseek (mfs_file *fd, int offset, int whence);
int mfs_read (mfs_file *fd, void *buf, int size);
int mfs_write (mfs_file *fd, void *buf, int size);
int mfs_size (mfs_file *fd);
int mfs_map (mfs_file *fd, char **addr, size_t *len);
int mfs_unmap (mfs_file *fd);
int mfs_close (mfs_file *fd);

#endif