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okuji 2002-12-27 08:53:07 +00:00
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/*
* PUPA -- Preliminary Universal Programming Architecture for GRUB
* Copyright (C) 2002 Yoshinori K. Okuji <okuji@enbug.org>
*
* PUPA is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with PUPA; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef PUPA_FILE_HEADER
#define PUPA_FILE_HEADER 1
#include <pupa/types.h>
#include <pupa/err.h>
#include <pupa/device.h>
#include <pupa/fs.h>
/* File description. */
struct pupa_file
{
/* The underlying device. */
pupa_device_t device;
/* The underlying filesystem. */
pupa_fs_t fs;
/* The current offset. */
pupa_ssize_t offset;
/* The file size. */
pupa_ssize_t size;
/* Filesystem-specific data. */
void *data;
/* This is called when a sector is read. Used only for a disk device. */
void (*read_hook) (unsigned long sector, unsigned offset, unsigned length);
};
typedef struct pupa_file *pupa_file_t;
/* Get a device name from NAME. */
char *EXPORT_FUNC(pupa_file_get_device_name) (const char *name);
pupa_file_t EXPORT_FUNC(pupa_file_open) (const char *name);
pupa_ssize_t EXPORT_FUNC(pupa_file_read) (pupa_file_t file, char *buf,
pupa_ssize_t len);
pupa_ssize_t EXPORT_FUNC(pupa_file_seek) (pupa_file_t file,
pupa_ssize_t offset);
pupa_err_t EXPORT_FUNC(pupa_file_close) (pupa_file_t file);
static inline pupa_ssize_t
pupa_file_size (const pupa_file_t file)
{
return file->size;
}
static inline pupa_ssize_t
pupa_file_tell (const pupa_file_t file)
{
return file->offset;
}
#endif /* ! PUPA_FILE_HEADER */