sys/sys/sbuf.h

   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: head/sys/sys/sbuf.h 249377 2013-04-11 19:49:18Z trociny $
  29  */
  30
  31 #ifndef _SYS_SBUF_H_
  32 #define _SYS_SBUF_H_
  33
  34 #include <machine/stdarg.h>
  35
  36 struct sbuf;
  37 typedef int (sbuf_drain_func)(void *, const char *, int);
  38
  39 /*
  40  * Structure definition
  41  */
  42 struct 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         ssize_t          s_size;        /* size of storage buffer */
  48         ssize_t          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_DYNSTRUCT  0x00080000      /* sbuf must be freed */
  55 #define SBUF_INSECTION  0x00100000      /* set by sbuf_start_section() */
  56         int              s_flags;       /* flags */
  57         ssize_t          s_sect_len;    /* current length of section */
  58 };
  59
  60 __BEGIN_DECLS
  61 /*
  62  * API functions
  63  */
  64 struct sbuf     *sbuf_new(struct sbuf *, char *, int, int);
  65 #define          sbuf_new_auto()                                \
  66         sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND)
  67 void             sbuf_clear(struct sbuf *);
  68 int              sbuf_setpos(struct sbuf *, ssize_t);
  69 int              sbuf_bcat(struct sbuf *, const void *, size_t);
  70 int              sbuf_bcpy(struct sbuf *, const void *, size_t);
  71 int              sbuf_cat(struct sbuf *, const char *);
  72 int              sbuf_cpy(struct sbuf *, const char *);
  73 int              sbuf_printf(struct sbuf *, const char *, ...)
  74         __printflike(2, 3);
  75 int              sbuf_vprintf(struct sbuf *, const char *, __va_list)
  76         __printflike(2, 0);
  77 int              sbuf_putc(struct sbuf *, int);
  78 void             sbuf_set_drain(struct sbuf *, sbuf_drain_func *, void *);
  79 int              sbuf_trim(struct sbuf *);
  80 int              sbuf_error(const struct sbuf *);
  81 int              sbuf_finish(struct sbuf *);
  82 char            *sbuf_data(struct sbuf *);
  83 ssize_t          sbuf_len(struct sbuf *);
  84 int              sbuf_done(const struct sbuf *);
  85 void             sbuf_delete(struct sbuf *);
  86 void             sbuf_start_section(struct sbuf *, ssize_t *);
  87 ssize_t          sbuf_end_section(struct sbuf *, ssize_t, size_t, int);
  88
  89 #ifdef _KERNEL
  90 struct uio;
  91 struct sbuf     *sbuf_uionew(struct sbuf *, struct uio *, int *);
  92 int              sbuf_bcopyin(struct sbuf *, const void *, size_t);
  93 int              sbuf_copyin(struct sbuf *, const void *, size_t);
  94 #endif
  95 __END_DECLS
  96
  97 #endif