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