/*	$OpenBSD$	*/

/*

 * Copyright (c) 2012 Eric Faurot <eric@openbsd.org>

 *

 * Permission to use, copy, modify, and distribute this software for any

 * purpose with or without fee is hereby granted, provided that the above

 * copyright notice and this permission notice appear in all copies.

 *

 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

 */

#include <sys/types.h>

#include <stdarg.h>

struct ioqbuf {

	struct ioqbuf	*next;

	char		*buf;

	size_t		 size;

	size_t		 wpos;

	size_t		 rpos;

};

struct iobuf {

	char		*buf;

	size_t		 max;

	size_t		 size;

	size_t		 wpos;

	size_t		 rpos;

	size_t		 queued;

	struct ioqbuf	*outq;

	struct ioqbuf	*outqlast;

};

#define IOBUF_WANT_READ		-1

#define IOBUF_WANT_WRITE	-2

#define IOBUF_CLOSED		-3

#define IOBUF_ERROR		-4

#define IOBUF_SSLERROR		-5

int	iobuf_init(struct iobuf *, size_t, size_t);

void	iobuf_clear(struct iobuf *);

int	iobuf_extend(struct iobuf *, size_t);

void	iobuf_normalize(struct iobuf *);

void	iobuf_drop(struct iobuf *, size_t);

size_t	iobuf_space(struct iobuf *);

size_t	iobuf_len(struct iobuf *);

size_t	iobuf_left(struct iobuf *);

char   *iobuf_data(struct iobuf *);

char   *iobuf_getline(struct iobuf *, size_t *);

ssize_t	iobuf_read(struct iobuf *, int);

ssize_t	iobuf_read_ssl(struct iobuf *, void *);

size_t  iobuf_queued(struct iobuf *);

void*   iobuf_reserve(struct iobuf *, size_t);

int	iobuf_queue(struct iobuf *, const void*, size_t);

int	iobuf_queuev(struct iobuf *, const struct iovec *, int);

int	iobuf_fqueue(struct iobuf *, const char *, ...);

int	iobuf_vfqueue(struct iobuf *, const char *, va_list);

int	iobuf_flush(struct iobuf *, int);

int	iobuf_flush_ssl(struct iobuf *, void *);

ssize_t	iobuf_write(struct iobuf *, int);

ssize_t	iobuf_write_ssl(struct iobuf *, void *);