1 /*	$OpenBSD: iobuf.h,v 1.1 2014/01/27 15:49:52 sunil Exp $	*/

     2 /*

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

     4  *

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

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

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

     8  *

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

    10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

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

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

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

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

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

    16  */

    17 

    18 #include <sys/types.h>

    19 

    20 #include <stdarg.h>

    21 

    22 struct ioqbuf {

    23 	struct ioqbuf	*next;

    24 	char		*buf;

    25 	size_t		 size;

    26 	size_t		 wpos;

    27 	size_t		 rpos;

    28 };

    29 

    30 struct iobuf {

    31 	char		*buf;

    32 	size_t		 max;

    33 	size_t		 size;

    34 	size_t		 wpos;

    35 	size_t		 rpos;

    36 

    37 	size_t		 queued;

    38 	struct ioqbuf	*outq;

    39 	struct ioqbuf	*outqlast;

    40 };

    41 

    42 #define IOBUF_WANT_READ		-1

    43 #define IOBUF_WANT_WRITE	-2

    44 #define IOBUF_CLOSED		-3

    45 #define IOBUF_ERROR		-4

    46 #define IOBUF_SSLERROR		-5

    47 

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

    49 void	iobuf_clear(struct iobuf *);

    50 

    51 int	iobuf_extend(struct iobuf *, size_t);

    52 void	iobuf_normalize(struct iobuf *);

    53 void	iobuf_drop(struct iobuf *, size_t);

    54 size_t	iobuf_space(struct iobuf *);

    55 size_t	iobuf_len(struct iobuf *);

    56 size_t	iobuf_left(struct iobuf *);

    57 char   *iobuf_data(struct iobuf *);

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

    59 ssize_t	iobuf_read(struct iobuf *, int);

    60 ssize_t	iobuf_read_ssl(struct iobuf *, void *);

    61 

    62 size_t  iobuf_queued(struct iobuf *);

    63 void*   iobuf_reserve(struct iobuf *, size_t);

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

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

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

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

    68 int	iobuf_flush(struct iobuf *, int);

    69 int	iobuf_flush_ssl(struct iobuf *, void *);

    70 ssize_t	iobuf_write(struct iobuf *, int);

    71 ssize_t	iobuf_write_ssl(struct iobuf *, void *);