util: unbreak endian detection on OpenBSD
[mesa.git] / src / util / u_endian.h
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27 #ifndef U_ENDIAN_H
28 #define U_ENDIAN_H
29
30 #ifdef HAVE_ENDIAN_H
31 #include <endian.h>
32
33 /* glibc */
34 #if defined(__BYTE_ORDER) && (__BYTE_ORDER == __LITTLE_ENDIAN)
35 # define UTIL_ARCH_LITTLE_ENDIAN 1
36 # define UTIL_ARCH_BIG_ENDIAN 0
37 #elif defined(__BYTE_ORDER) && (__BYTE_ORDER == __BIG_ENDIAN)
38 # define UTIL_ARCH_LITTLE_ENDIAN 0
39 # define UTIL_ARCH_BIG_ENDIAN 1
40 #endif
41
42 #if defined(BYTE_ORDER) && (BYTE_ORDER == LITTLE_ENDIAN)
43 # define UTIL_ARCH_LITTLE_ENDIAN 1
44 # define UTIL_ARCH_BIG_ENDIAN 0
45 #elif defined(BYTE_ORDER) && (BYTE_ORDER == BIG_ENDIAN)
46 # define UTIL_ARCH_LITTLE_ENDIAN 0
47 # define UTIL_ARCH_BIG_ENDIAN 1
48 #endif
49
50 #elif defined(__APPLE__)
51 #include <machine/endian.h>
52
53 #if __DARWIN_BYTE_ORDER == __DARWIN_LITTLE_ENDIAN
54 # define UTIL_ARCH_LITTLE_ENDIAN 1
55 # define UTIL_ARCH_BIG_ENDIAN 0
56 #elif __DARWIN_BYTE_ORDER == __DARWIN_BIG_ENDIAN
57 # define UTIL_ARCH_LITTLE_ENDIAN 0
58 # define UTIL_ARCH_BIG_ENDIAN 1
59 #endif
60
61 #elif defined(__sun)
62 #include <sys/isa_defs.h>
63
64 #if defined(_LITTLE_ENDIAN)
65 # define UTIL_ARCH_LITTLE_ENDIAN 1
66 # define UTIL_ARCH_BIG_ENDIAN 0
67 #elif defined(_BIG_ENDIAN)
68 # define UTIL_ARCH_LITTLE_ENDIAN 0
69 # define UTIL_ARCH_BIG_ENDIAN 1
70 #endif
71
72 #elif defined(__NetBSD__) || defined(__FreeBSD__) || \
73 defined(__DragonFly__)
74 #include <sys/types.h>
75 #include <machine/endian.h>
76
77 #if _BYTE_ORDER == _LITTLE_ENDIAN
78 # define UTIL_ARCH_LITTLE_ENDIAN 1
79 # define UTIL_ARCH_BIG_ENDIAN 0
80 #elif _BYTE_ORDER == _BIG_ENDIAN
81 # define UTIL_ARCH_LITTLE_ENDIAN 0
82 # define UTIL_ARCH_BIG_ENDIAN 1
83 #endif
84
85 #elif defined(_WIN32) || defined(ANDROID)
86
87 #define UTIL_ARCH_LITTLE_ENDIAN 1
88 #define UTIL_ARCH_BIG_ENDIAN 0
89
90 #endif
91
92 #if !defined(UTIL_ARCH_LITTLE_ENDIAN) || !defined(UTIL_ARCH_BIG_ENDIAN)
93 # error "UTIL_ARCH_LITTLE_ENDIAN and/or UTIL_ARCH_BIG_ENDIAN were unset."
94 #elif UTIL_ARCH_LITTLE_ENDIAN == UTIL_ARCH_BIG_ENDIAN
95 # error "UTIL_ARCH_LITTLE_ENDIAN and UTIL_ARCH_BIG_ENDIAN must not both be 1 or 0."
96 #endif
97
98 #endif