2 /* $NetBSD: citrus_region.h,v 1.7 2008/02/09 14:56:20 junyoung Exp $ */
5 * SPDX-License-Identifier: BSD-2-Clause
7 * Copyright (c)2003 Citrus Project,
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #ifndef _CITRUS_REGION_H_
34 #define _CITRUS_REGION_H_
36 #include <sys/types.h>
38 struct _citrus_region {
44 _citrus_region_init(struct _citrus_region *r, void *h, size_t sz)
51 static __inline void *
52 _citrus_region_head(const struct _citrus_region *r)
58 static __inline size_t
59 _citrus_region_size(const struct _citrus_region *r)
66 _citrus_region_check(const struct _citrus_region *r, size_t ofs, size_t sz)
69 return (r->r_size >= ofs + sz ? 0 : -1);
72 static __inline void *
73 _citrus_region_offset(const struct _citrus_region *r, size_t pos)
76 return ((void *)((uint8_t *)r->r_head + pos));
79 static __inline uint8_t
80 _citrus_region_peek8(const struct _citrus_region *r, size_t pos)
83 return (*(uint8_t *)_citrus_region_offset(r, pos));
86 static __inline uint16_t
87 _citrus_region_peek16(const struct _citrus_region *r, size_t pos)
91 memcpy(&val, _citrus_region_offset(r, pos), (size_t)2);
95 static __inline uint32_t
96 _citrus_region_peek32(const struct _citrus_region *r, size_t pos)
100 memcpy(&val, _citrus_region_offset(r, pos), (size_t)4);
105 _citrus_region_get_subregion(struct _citrus_region *subr,
106 const struct _citrus_region *r, size_t ofs, size_t sz)
109 if (_citrus_region_check(r, ofs, sz))
111 _citrus_region_init(subr, _citrus_region_offset(r, ofs), sz);