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// license:BSD-3-Clause
// copyright-holders:Nathan Woods
/*********************************************************************
ioprocs.h
File IO abstraction layer
*********************************************************************/
#ifndef MAME_FORMATS_IOPROCS_H
#define MAME_FORMATS_IOPROCS_H
#pragma once
#include <stdint.h>
#include <stdlib.h>
/***************************************************************************
Type definitions
***************************************************************************/
struct io_procs
{
void (*closeproc)(void *file);
int (*seekproc)(void *file, int64_t offset, int whence);
size_t (*readproc)(void *file, void *buffer, size_t length);
size_t (*writeproc)(void *file, const void *buffer, size_t length);
uint64_t (*filesizeproc)(void *file);
};
struct io_generic
{
const struct io_procs *procs;
void *file;
uint8_t filler;
};
/***************************************************************************
Globals
***************************************************************************/
extern const struct io_procs stdio_ioprocs;
extern const struct io_procs stdio_ioprocs_noclose;
extern const struct io_procs corefile_ioprocs;
extern const struct io_procs corefile_ioprocs_noclose;
/***************************************************************************
Prototypes
***************************************************************************/
void io_generic_close(struct io_generic *genio);
void io_generic_read(struct io_generic *genio, void *buffer, uint64_t offset, size_t length);
void io_generic_write(struct io_generic *genio, const void *buffer, uint64_t offset, size_t length);
void io_generic_write_filler(struct io_generic *genio, uint8_t filler, uint64_t offset, size_t length);
uint64_t io_generic_size(struct io_generic *genio);
#endif // MAME_FORMATS_IOPROCS_H
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