xref: /third_party/mesa3d/src/util/u_endian.h (revision bf215546)
1/**************************************************************************
2 *
3 * Copyright 2007-2008 VMware, Inc.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
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
99