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0d5acd74 | 1 | /* $FreeBSD: head/lib/libc/iconv/citrus_region.h 219019 2011-02-25 00:04:39Z gabor $ */ |
52347f71 | 2 | /* $NetBSD: citrus_region.h,v 1.7 2008/02/09 14:56:20 junyoung Exp $ */ |
2180e8af JS |
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 | ||
0d5acd74 JM |
34 | #include <sys/types.h> |
35 | ||
2180e8af | 36 | struct _citrus_region { |
2180e8af | 37 | void *r_head; |
0d5acd74 | 38 | size_t r_size; |
2180e8af JS |
39 | }; |
40 | ||
41 | static __inline void | |
42 | _citrus_region_init(struct _citrus_region *r, void *h, size_t sz) | |
43 | { | |
0d5acd74 | 44 | |
2180e8af JS |
45 | r->r_head = h; |
46 | r->r_size = sz; | |
47 | } | |
48 | ||
49 | static __inline void * | |
50 | _citrus_region_head(const struct _citrus_region *r) | |
51 | { | |
0d5acd74 JM |
52 | |
53 | return (r->r_head); | |
2180e8af JS |
54 | } |
55 | ||
56 | static __inline size_t | |
57 | _citrus_region_size(const struct _citrus_region *r) | |
58 | { | |
0d5acd74 JM |
59 | |
60 | return (r->r_size); | |
2180e8af JS |
61 | } |
62 | ||
63 | static __inline int | |
64 | _citrus_region_check(const struct _citrus_region *r, size_t ofs, size_t sz) | |
65 | { | |
0d5acd74 JM |
66 | |
67 | return (r->r_size >= ofs + sz ? 0 : -1); | |
2180e8af JS |
68 | } |
69 | ||
70 | static __inline void * | |
71 | _citrus_region_offset(const struct _citrus_region *r, size_t pos) | |
72 | { | |
0d5acd74 JM |
73 | |
74 | return ((void *)((uint8_t *)r->r_head + pos)); | |
2180e8af JS |
75 | } |
76 | ||
77 | static __inline uint8_t | |
78 | _citrus_region_peek8(const struct _citrus_region *r, size_t pos) | |
79 | { | |
0d5acd74 JM |
80 | |
81 | return (*(uint8_t *)_citrus_region_offset(r, pos)); | |
2180e8af JS |
82 | } |
83 | ||
84 | static __inline uint16_t | |
85 | _citrus_region_peek16(const struct _citrus_region *r, size_t pos) | |
86 | { | |
87 | uint16_t val; | |
0d5acd74 JM |
88 | |
89 | memcpy(&val, _citrus_region_offset(r, pos), (size_t)2); | |
90 | return (val); | |
2180e8af JS |
91 | } |
92 | ||
93 | static __inline uint32_t | |
94 | _citrus_region_peek32(const struct _citrus_region *r, size_t pos) | |
95 | { | |
96 | uint32_t val; | |
0d5acd74 JM |
97 | |
98 | memcpy(&val, _citrus_region_offset(r, pos), (size_t)4); | |
99 | return (val); | |
2180e8af JS |
100 | } |
101 | ||
f01b2a75 JS |
102 | static __inline int |
103 | _citrus_region_get_subregion(struct _citrus_region *subr, | |
0d5acd74 | 104 | const struct _citrus_region *r, size_t ofs, size_t sz) |
f01b2a75 | 105 | { |
0d5acd74 | 106 | |
f01b2a75 | 107 | if (_citrus_region_check(r, ofs, sz)) |
0d5acd74 | 108 | return (-1); |
f01b2a75 | 109 | _citrus_region_init(subr, _citrus_region_offset(r, ofs), sz); |
0d5acd74 | 110 | return (0); |
f01b2a75 JS |
111 | } |
112 | ||
2180e8af | 113 | #endif |