1 /*	$OpenBSD$	*/
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 *);
72