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macros.h
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1 /* libFLAC - Free Lossless Audio Codec library
2  * Copyright (C) 2012-2016 Xiph.org Foundation
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  *
8  * - Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  *
11  * - Redistributions in binary form must reproduce the above copyright
12  * notice, this list of conditions and the following disclaimer in the
13  * documentation and/or other materials provided with the distribution.
14  *
15  * - Neither the name of the Xiph.org Foundation nor the names of its
16  * contributors may be used to endorse or promote products derived from
17  * this software without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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29  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30  */
31 
32 #ifndef FLAC__PRIVATE__MACROS_H
33 #define FLAC__PRIVATE__MACROS_H
34 
35 #if defined(__GNUC__) && (defined(__clang__) || __GNUC__ > 4 || ( __GNUC__ == 4 && __GNUC_MINOR__ >= 3))
36 
37 #define flac_max(a,b) \
38  ({ __typeof__ (a) _a = (a); \
39  __typeof__ (b) _b = (b); \
40  _a > _b ? _a : _b; })
41 
42 #define MIN_PASTE(A,B) A##B
43 #define MIN_IMPL(A,B,L) ({ \
44  __typeof__(A) MIN_PASTE(__a,L) = (A); \
45  __typeof__(B) MIN_PASTE(__b,L) = (B); \
46  MIN_PASTE(__a,L) < MIN_PASTE(__b,L) ? MIN_PASTE(__a,L) : MIN_PASTE(__b,L); \
47  })
48 
49 #define flac_min(A,B) MIN_IMPL(A,B,__COUNTER__)
50 
51 /* Whatever other unix that has sys/param.h */
52 #elif defined(HAVE_SYS_PARAM_H)
53 #include <sys/param.h>
54 #define flac_max(a,b) MAX(a,b)
55 #define flac_min(a,b) MIN(a,b)
56 
57 /* Windows VS has them in stdlib.h.. XXX:Untested */
58 #elif defined(_MSC_VER)
59 #include <stdlib.h>
60 #define flac_max(a,b) __max(a,b)
61 #define flac_min(a,b) __min(a,b)
62 #endif
63 
64 #ifndef MIN
65 #define MIN(x,y) ((x) <= (y) ? (x) : (y))
66 #endif
67 
68 #ifndef MAX
69 #define MAX(x,y) ((x) >= (y) ? (x) : (y))
70 #endif
71 
72 #endif