Replace legacy make with bmake
[dragonfly.git] / lib / libc / citrus / citrus_region.h
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1/* $NetBSD: citrus_region.h,v 1.7 2008/02/09 14:56:20 junyoung Exp $ */
2/* $DragonFly: src/lib/libc/citrus/citrus_region.h,v 1.3 2008/04/10 10:21:01 hasso Exp $ */
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3
4/*-
5 * Copyright (c)2003 Citrus Project,
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 */
30
31#ifndef _CITRUS_REGION_H_
32#define _CITRUS_REGION_H_
33
34struct _citrus_region {
35/* private: */
36 void *r_head;
37 size_t r_size;
38};
39
40static __inline void
41_citrus_region_init(struct _citrus_region *r, void *h, size_t sz)
42{
43 _DIAGASSERT(r);
44 r->r_head = h;
45 r->r_size = sz;
46}
47
48static __inline void *
49_citrus_region_head(const struct _citrus_region *r)
50{
51 return r->r_head;
52}
53
54static __inline size_t
55_citrus_region_size(const struct _citrus_region *r)
56{
57 return r->r_size;
58}
59
60static __inline int
61_citrus_region_check(const struct _citrus_region *r, size_t ofs, size_t sz)
62{
63 return r->r_size >= ofs + sz ? 0 : -1;
64}
65
66static __inline void *
67_citrus_region_offset(const struct _citrus_region *r, size_t pos)
68{
69 return (void *)((uint8_t *)r->r_head + pos);
70}
71
72static __inline uint8_t
73_citrus_region_peek8(const struct _citrus_region *r, size_t pos)
74{
75 return *(uint8_t *)_citrus_region_offset(r, pos);
76}
77
78static __inline uint16_t
79_citrus_region_peek16(const struct _citrus_region *r, size_t pos)
80{
81 uint16_t val;
82 memcpy(&val, _citrus_region_offset(r, pos), 2);
83 return val;
84}
85
86static __inline uint32_t
87_citrus_region_peek32(const struct _citrus_region *r, size_t pos)
88{
89 uint32_t val;
90 memcpy(&val, _citrus_region_offset(r, pos), 4);
91 return val;
92}
93
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94static __inline int
95_citrus_region_get_subregion(struct _citrus_region *subr,
96 const struct _citrus_region *r,
97 size_t ofs, size_t sz)
98{
99 if (_citrus_region_check(r, ofs, sz))
100 return -1;
101 _citrus_region_init(subr, _citrus_region_offset(r, ofs), sz);
102 return 0;
103}
104
2180e8af 105#endif