#pragma once

#include <sys/assert.h>
#include <sys/errno.h>

struct fastfile;
typedef struct fastfile fastfile_t;

struct fastfile {
	int		size;
	
	struct {
		int (*seek)	(fastfile_t *ff,int position);
		int (*tell)	(fastfile_t *ff);
		int	(*read)	(fastfile_t *ff,void *buffer,int len);
		int (*write)(fastfile_t *ff,void *buffer,int len);
		int (*close)(fastfile_t *ff);
	} ops;
};


static inline int ff_seek(fastfile_t *ff,int position) {
	if (!ff || !ff->ops.seek)
		return -ENULLPTR;
	return ff->ops.seek(ff,position);
};

static inline int ff_tell(fastfile_t *ff) {
	if (!ff || !ff->ops.tell)
		return -ENULLPTR;
	return ff->ops.tell(ff);
};

static inline int ff_read(fastfile_t *ff,void *buffer,int len) {
	if (!ff || !ff->ops.read)
		return -ENULLPTR;
	return ff->ops.read(ff,buffer,len);
};

static inline int ff_write(fastfile_t *ff,void *buffer,int len) {
	if (!ff || !ff->ops.write)
		return -ENULLPTR;
	return ff->ops.write(ff,buffer,len);
};

static inline int ff_close(fastfile_t *ff) {
	if (!ff || !ff->ops.close)
		return -ENULLPTR;
	return ff->ops.close(ff);
};