The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/sbuf.h

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    1 /*-
    2  * Copyright (c) 2000-2008 Poul-Henning Kamp
    3  * Copyright (c) 2000-2008 Dag-Erling Coïdan Smørgrav
    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: releng/8.3/sys/sys/sbuf.h 222574 2011-06-01 17:36:52Z mdf $
   29  */
   30 
   31 #ifndef _SYS_SBUF_H_
   32 #define _SYS_SBUF_H_
   33 
   34 #include <sys/_types.h>
   35 
   36 struct sbuf;
   37 struct sbuf_drain_data;
   38 typedef int (sbuf_drain_func)(void *, const char *, int);
   39 
   40 /*
   41  * Structure definition
   42  */
   43 struct sbuf {
   44         char            *s_buf;         /* storage buffer */
   45         struct sbuf_drain *s_drain;     /* drain function and data */
   46         int              s_size;        /* size of storage buffer */
   47         int              s_len;         /* current length of string */
   48 #define SBUF_FIXEDLEN   0x00000000      /* fixed length buffer (default) */
   49 #define SBUF_AUTOEXTEND 0x00000001      /* automatically extend buffer */
   50 #define SBUF_USRFLAGMSK 0x0000ffff      /* mask of flags the user may specify */
   51 #define SBUF_DYNAMIC    0x00010000      /* s_buf must be freed */
   52 #define SBUF_FINISHED   0x00020000      /* set by sbuf_finish() */
   53 #define SBUF_OVERFLOWED 0x00040000      /* sbuf overflowed */
   54 #define SBUF_DYNSTRUCT  0x00080000      /* sbuf must be freed */
   55         int              s_flags;       /* flags */
   56 };
   57 
   58 __BEGIN_DECLS
   59 /*
   60  * API functions
   61  */
   62 struct sbuf     *sbuf_new(struct sbuf *, char *, int, int);
   63 #define          sbuf_new_auto()                                \
   64         sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND)
   65 void             sbuf_clear(struct sbuf *);
   66 int              sbuf_setpos(struct sbuf *, int);
   67 int              sbuf_bcat(struct sbuf *, const void *, size_t);
   68 int              sbuf_bcpy(struct sbuf *, const void *, size_t);
   69 int              sbuf_cat(struct sbuf *, const char *);
   70 int              sbuf_cpy(struct sbuf *, const char *);
   71 int              sbuf_printf(struct sbuf *, const char *, ...)
   72         __printflike(2, 3);
   73 int              sbuf_vprintf(struct sbuf *, const char *, __va_list)
   74         __printflike(2, 0);
   75 int              sbuf_putc(struct sbuf *, int);
   76 void             sbuf_set_drain(struct sbuf *, sbuf_drain_func *, void *);
   77 int              sbuf_trim(struct sbuf *);
   78 int              sbuf_overflowed(struct sbuf *);
   79 int              sbuf_finish(struct sbuf *);
   80 char            *sbuf_data(struct sbuf *);
   81 int              sbuf_len(struct sbuf *);
   82 int              sbuf_done(struct sbuf *);
   83 void             sbuf_delete(struct sbuf *);
   84 
   85 #ifdef _KERNEL
   86 struct uio;
   87 struct sbuf     *sbuf_uionew(struct sbuf *, struct uio *, int *);
   88 int              sbuf_bcopyin(struct sbuf *, const void *, size_t);
   89 int              sbuf_copyin(struct sbuf *, const void *, size_t);
   90 #endif
   91 __END_DECLS
   92 
   93 #endif

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