1 /*
2  * bufio.h was written by Omar Polo <op@omarpolo.com>
3  *
4  * This is free and unencumbered software released into the public domain.
5  *
6  * Anyone is free to copy, modify, publish, use, compile, sell, or
7  * distribute this software, either in source code form or as a compiled
8  * binary, for any purpose, commercial or non-commercial, and by any
9  * means.
10  *
11  * In jurisdictions that recognize copyright laws, the author or authors
12  * of this software dedicate any and all copyright interest in the
13  * software to the public domain. We make this dedication for the benefit
14  * of the public at large and to the detriment of our heirs and
15  * successors. We intend this dedication to be an overt act of
16  * relinquishment in perpetuity of all present and future rights to this
17  * software under copyright law.
18  *
19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
22  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
23  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
24  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25  * OTHER DEALINGS IN THE SOFTWARE.
26  */
27 
28 struct tls;
29 
30 #define BIO_CHUNK	128
31 struct buf {
32 	uint8_t		*buf;
33 	size_t		 len;
34 	size_t		 cap;
35 	size_t		 cur;
36 };
37 
38 struct bufio {
39 	int		 fd;
40 	struct tls	*ctx;
41 	int		 wantev;
42 	struct buf	 wbuf;
43 	struct buf	 rbuf;
44 };
45 
46 #define	BUFIO_WANT_READ		0x1
47 #define	BUFIO_WANT_WRITE	0x2
48 
49 int		 buf_init(struct buf *);
50 int		 buf_has_line(struct buf *, const char *);
51 char		*buf_getdelim(struct buf *, const char *, size_t *);
52 void		 buf_drain(struct buf *, size_t);
53 void		 buf_drain_line(struct buf *, const char *);
54 void		 buf_free(struct buf *);
55 
56 int		 bufio_init(struct bufio *);
57 void		 bufio_free(struct bufio *);
58 int		 bufio_close(struct bufio *);
59 int		 bufio_reset(struct bufio *);
60 void		 bufio_set_fd(struct bufio *, int);
61 int		 bufio_starttls(struct bufio *, const char *, int,
62 		    const uint8_t *, size_t, const uint8_t *, size_t);
63 int		 bufio_ev(struct bufio *);
64 int		 bufio_handshake(struct bufio *);
65 ssize_t		 bufio_read(struct bufio *);
66 size_t		 bufio_drain(struct bufio *, void *, size_t);
67 ssize_t		 bufio_write(struct bufio *);
68 const char	*bufio_io_err(struct bufio *);
69 int		 bufio_compose(struct bufio *, const void *, size_t);
70 int		 bufio_compose_str(struct bufio *, const char *);
71 int		 bufio_compose_fmt(struct bufio *, const char *, ...)
72 		    __attribute__((__format__ (printf, 2, 3)));
73 void		 bufio_rewind_cursor(struct bufio *);
74 
75 /* callbacks for pdjson */
76 int		 bufio_get_cb(void *);
77 int		 bufio_peek_cb(void *);