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1 /*
2  * nghttp3
3  *
4  * Copyright (c) 2019 nghttp3 contributors
5  * Copyright (c) 2017 ngtcp2 contributors
6  *
7  * Permission is hereby granted, free of charge, to any person obtaining
8  * a copy of this software and associated documentation files (the
9  * "Software"), to deal in the Software without restriction, including
10  * without limitation the rights to use, copy, modify, merge, publish,
11  * distribute, sublicense, and/or sell copies of the Software, and to
12  * permit persons to whom the Software is furnished to do so, subject to
13  * the following conditions:
14  *
15  * The above copyright notice and this permission notice shall be
16  * included in all copies or substantial portions of the Software.
17  *
18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
22  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25  */
26 #ifndef NGHTTP3_MACRO_H
27 #define NGHTTP3_MACRO_H
28 
29 #ifdef HAVE_CONFIG_H
30 #  include <config.h>
31 #endif /* HAVE_CONFIG_H */
32 
33 #include <stddef.h>
34 
35 #include <nghttp3/nghttp3.h>
36 
37 #define nghttp3_min(A, B) ((A) < (B) ? (A) : (B))
38 #define nghttp3_max(A, B) ((A) > (B) ? (A) : (B))
39 
40 #define nghttp3_struct_of(ptr, type, member)                                   \
41   ((type *)(void *)((char *)(ptr)-offsetof(type, member)))
42 
43 #define nghttp3_arraylen(A) (sizeof(A) / sizeof(*(A)))
44 
45 #define lstreq(A, B, N) ((sizeof((A)) - 1) == (N) && memcmp((A), (B), (N)) == 0)
46 
47 /* NGHTTP3_MAX_VARINT` is the maximum value which can be encoded in
48    variable-length integer encoding. */
49 #define NGHTTP3_MAX_VARINT ((1ULL << 62) - 1)
50 
51 #endif /* NGHTTP3_MACRO_H */
52