sbuf.h revision 212367 
1/*-
2 * Copyright (c) 2000-2008 Poul-Henning Kamp
3 * Copyright (c) 2000-2008 Dag-Erling Co��dan Sm��rgrav
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer
11 *    in this position and unchanged.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 *      $FreeBSD: head/sys/sys/sbuf.h 212367 2010-09-09 17:49:18Z mdf $
29 */
30
31#ifndef _SYS_SBUF_H_
32#define	_SYS_SBUF_H_
33
34#include <sys/_types.h>
35
36struct sbuf;
37typedef int (sbuf_drain_func)(void *, const char *, int);
38
39/*
40 * Structure definition
41 */
42struct sbuf {
43	char		*s_buf;		/* storage buffer */
44	sbuf_drain_func	*s_drain_func;	/* drain function */
45	void		*s_drain_arg;	/* user-supplied drain argument */
46	int		 s_error;	/* current error code */
47	int		 s_size;	/* size of storage buffer */
48	int		 s_len;		/* current length of string */
49#define	SBUF_FIXEDLEN	0x00000000	/* fixed length buffer (default) */
50#define	SBUF_AUTOEXTEND	0x00000001	/* automatically extend buffer */
51#define	SBUF_USRFLAGMSK	0x0000ffff	/* mask of flags the user may specify */
52#define	SBUF_DYNAMIC	0x00010000	/* s_buf must be freed */
53#define	SBUF_FINISHED	0x00020000	/* set by sbuf_finish() */
54#define	SBUF_OVERFLOWED	0x00040000	/* sbuf overflowed */
55#define	SBUF_DYNSTRUCT	0x00080000	/* sbuf must be freed */
56	int		 s_flags;	/* flags */
57};
58
59__BEGIN_DECLS
60/*
61 * API functions
62 */
63struct sbuf	*sbuf_new(struct sbuf *, char *, int, int);
64#define		 sbuf_new_auto()				\
65	sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND)
66void		 sbuf_clear(struct sbuf *);
67int		 sbuf_setpos(struct sbuf *, int);
68int		 sbuf_bcat(struct sbuf *, const void *, size_t);
69int		 sbuf_bcpy(struct sbuf *, const void *, size_t);
70int		 sbuf_cat(struct sbuf *, const char *);
71int		 sbuf_cpy(struct sbuf *, const char *);
72int		 sbuf_printf(struct sbuf *, const char *, ...)
73	__printflike(2, 3);
74int		 sbuf_vprintf(struct sbuf *, const char *, __va_list)
75	__printflike(2, 0);
76int		 sbuf_putc(struct sbuf *, int);
77void		 sbuf_set_drain(struct sbuf *, sbuf_drain_func *, void *);
78int		 sbuf_trim(struct sbuf *);
79int		 sbuf_overflowed(struct sbuf *);
80int		 sbuf_finish(struct sbuf *);
81char		*sbuf_data(struct sbuf *);
82int		 sbuf_len(struct sbuf *);
83int		 sbuf_done(struct sbuf *);
84void		 sbuf_delete(struct sbuf *);
85
86#ifdef _KERNEL
87struct uio;
88struct sbuf	*sbuf_uionew(struct sbuf *, struct uio *, int *);
89int		 sbuf_bcopyin(struct sbuf *, const void *, size_t);
90int		 sbuf_copyin(struct sbuf *, const void *, size_t);
91#endif
92__END_DECLS
93
94#endif
95