ReactOS 0.4.15-dev-7131-ge4d03f4
byte_order.h
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1/* @(#)byte_order.h 1.3 15/11/22 2015 J. Schilling */
2/* byte_order.h */
3/*
4 * SHA3 hash code taken from
5 * https://github.com/rhash/RHash/tree/master/librhash
6 *
7 * Portions Copyright (c) 2015 J. Schilling
8 */
9#ifndef BYTE_ORDER_H
10#define BYTE_ORDER_H
11#include <schily/stdlib.h>
12#include <schily/types.h>
13#include <schily/stdint.h>
14
15#ifdef IN_RHASH
16#include "config.h"
17#endif
18
19#ifdef __GLIBC__
20# include <endian.h>
21#endif
22
23#ifdef __cplusplus
24extern "C" {
25#endif
26
27#ifdef HAVE_C_BIGENDIAN
28
29/*
30 * Use the Schily autoconf results.
31 */
32#ifdef WORDS_BIGENDIAN
33#define CPU_BIG_ENDIAN
34#else
35#define CPU_LITTLE_ENDIAN
36#endif
37
38#else /* HAVE_C_BIGENDIAN */
39
40/* if x86 compatible cpu */
41#if defined(i386) || defined(__i386__) || defined(__i486__) || \
42 defined(__i586__) || defined(__i686__) || defined(__pentium__) || \
43 defined(__pentiumpro__) || defined(__pentium4__) || \
44 defined(__nocona__) || defined(prescott) || defined(__core2__) || \
45 defined(__k6__) || defined(__k8__) || defined(__athlon__) || \
46 defined(__amd64) || defined(__amd64__) || \
47 defined(__x86_64) || defined(__x86_64__) || defined(_M_IX86) || \
48 defined(_M_AMD64) || defined(_M_IA64) || defined(_M_X64)
49/* detect if x86-64 instruction set is supported */
50# if defined(_LP64) || defined(__LP64__) || defined(__x86_64) || \
51 defined(__x86_64__) || defined(_M_AMD64) || defined(_M_X64)
52#define CPU_X64
53#else
54#define CPU_IA32
55#endif
56#endif
57
58
59/* detect CPU endianness */
60#if (defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && \
61 __BYTE_ORDER == __LITTLE_ENDIAN) || \
62 defined(CPU_IA32) || defined(CPU_X64) || \
63 defined(__ia64) || defined(__ia64__) || defined(__alpha__) || defined(_M_ALPHA) || \
64 defined(vax) || defined(MIPSEL) || \
65 defined(_ARM_) || defined(__arm64__) || defined(_M_ARM) || defined(_M_ARM64)
66#define CPU_LITTLE_ENDIAN
67#define IS_BIG_ENDIAN 0
68#define IS_LITTLE_ENDIAN 1
69#elif (defined(__BYTE_ORDER) && defined(__BIG_ENDIAN) && \
70 __BYTE_ORDER == __BIG_ENDIAN) || \
71 defined(__sparc) || defined(__sparc__) || defined(sparc) || \
72 defined(_ARCH_PPC) || defined(_ARCH_PPC64) || defined(_POWER) || \
73 defined(__POWERPC__) || defined(POWERPC) || defined(__powerpc) || \
74 defined(__powerpc__) || defined(__powerpc64__) || defined(__ppc__) || \
75 defined(__hpux) || defined(_MIPSEB) || defined(mc68000) || \
76 defined(__s390__) || defined(__s390x__) || defined(sel)
77#define CPU_BIG_ENDIAN
78#define IS_BIG_ENDIAN 1
79#define IS_LITTLE_ENDIAN 0
80#else
81#error "Can't detect CPU architechture"
82#endif
83
84#endif /* HAVE_C_BIGENDIAN */
85
86#define IS_ALIGNED_32(p) (0 == (3 & ((const char *)(p) - (const char *)0)))
87#define IS_ALIGNED_64(p) (0 == (7 & ((const char *)(p) - (const char *)0)))
88
89#if defined(_MSC_VER)
90#define ALIGN_ATTR(n) __declspec(align(n))
91#elif defined(__GNUC__)
92#define ALIGN_ATTR(n) __attribute__((aligned(n)))
93#else
94#define ALIGN_ATTR(n) /* nothing */
95#endif
96
97
98#ifdef PROTOTYPES
99#if defined(_MSC_VER) || defined(__BORLANDC__)
100#define I64(x) x##ui64
101#define UI64(x) x##ui64
102#else
103#define I64(x) x##LL
104#define UI64(x) x##ULL
105#endif
106#else /* !PROTOTYPES */
107#ifdef __hpux
108#define I64(x) xLL
109#define UI64(x) xULL
110#else
111#define I64(x) ((long long)(x))
112#define UI64(x) ((unsigned long long)(x))
113#endif
114#endif /* !PROTOTYPES */
115
116/* convert a hash flag to index */
117#if __GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) /* GCC < 3.4 */
118#define rhash_ctz(x) __builtin_ctz(x)
119#else
120unsigned rhash_ctz __PR((unsigned)); /* define as function */
121#endif
122
123void rhash_swap_copy_str_to_u32 __PR((void* to, int idx, const void* from, size_t length));
124void rhash_swap_copy_str_to_u64 __PR((void* to, int idx, const void* from, size_t length));
125void rhash_swap_copy_u64_to_str __PR((void* to, const void* from, size_t length));
126void rhash_u32_mem_swap __PR((unsigned *p, int length_in_u32));
127
128/* define bswap_32 */
129#if defined(__GNUC__) && defined(CPU_IA32) && !defined(__i386__)
130/* for intel x86 CPU */
131static inline UInt32_t bswap_32(UInt32_t x) {
132 __asm("bswap\t%0" : "=r" (x) : "0" (x));
133 return (x);
134}
135#elif defined(__GNUC__) && (__GNUC__ >= 4) && (__GNUC__ > 4 || __GNUC_MINOR__ >= 3)
136/* for GCC >= 4.3 */
137# define bswap_32(x) __builtin_bswap32(x)
138#elif (_MSC_VER > 1300) && (defined(CPU_IA32) || defined(CPU_X64)) /* MS VC */
139# define bswap_32(x) _byteswap_ulong((unsigned long)x)
140#elif !defined(__STRICT_ANSI__)
141/* general bswap_32 definition */
142static inline UInt32_t bswap_32 __PR((UInt32_t x));
143static inline UInt32_t bswap_32(x)
144 UInt32_t x;
145{
146 x = ((x << 8) & 0xFF00FF00) | ((x >> 8) & 0x00FF00FF);
147 return ((x >> 16) | (x << 16));
148}
149#else
150#define bswap_32(x) ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \
151 (((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
152#endif /* bswap_32 */
153
154#if defined(__GNUC__) && (__GNUC__ >= 4) && (__GNUC__ > 4 || __GNUC_MINOR__ >= 3)
155# define bswap_64(x) __builtin_bswap64(x)
156#elif (_MSC_VER > 1300) && (defined(CPU_IA32) || defined(CPU_X64)) /* MS VC */
157# define bswap_64(x) _byteswap_uint64((__int64)x)
158#elif !defined(__STRICT_ANSI__)
159static inline UInt64_t bswap_64 __PR((UInt64_t x));
160static inline UInt64_t bswap_64(x)
161 UInt64_t x;
162{
163 union {
164 UInt64_t ll;
165 UInt32_t l[2];
166 } w, r;
167 w.ll = x;
168 r.l[0] = bswap_32(w.l[1]);
169 r.l[1] = bswap_32(w.l[0]);
170 return (r.ll);
171}
172#else
173#error "bswap_64 unsupported"
174#endif
175
176#ifdef CPU_BIG_ENDIAN
177# define be2me_32(x) (x)
178# define be2me_64(x) (x)
179# define le2me_32(x) bswap_32(x)
180# define le2me_64(x) bswap_64(x)
181
182# define be32_copy(to, index, from, length) memcpy((to) + (index), (from), (length))
183# define le32_copy(to, index, from, length) rhash_swap_copy_str_to_u32((to), (index), (from), (length))
184# define be64_copy(to, index, from, length) memcpy((to) + (index), (from), (length))
185# define le64_copy(to, index, from, length) rhash_swap_copy_str_to_u64((to), (index), (from), (length))
186# define me64_to_be_str(to, from, length) memcpy((to), (from), (length))
187# define me64_to_le_str(to, from, length) rhash_swap_copy_u64_to_str((to), (from), (length))
188
189#else /* CPU_BIG_ENDIAN */
190# define be2me_32(x) bswap_32(x)
191# define be2me_64(x) bswap_64(x)
192# define le2me_32(x) (x)
193# define le2me_64(x) (x)
194
195# define be32_copy(to, index, from, length) rhash_swap_copy_str_to_u32((to), (index), (from), (length))
196# define le32_copy(to, index, from, length) memcpy((to) + (index), (from), (length))
197# define be64_copy(to, index, from, length) rhash_swap_copy_str_to_u64((to), (index), (from), (length))
198# define le64_copy(to, index, from, length) memcpy((to) + (index), (from), (length))
199# define me64_to_be_str(to, from, length) rhash_swap_copy_u64_to_str((to), (from), (length))
200# define me64_to_le_str(to, from, length) memcpy((to), (from), (length))
201#endif /* CPU_BIG_ENDIAN */
202
203/* ROTL/ROTR macros rotate a 32/64-bit word left/right by n bits */
204#define ROTL32(dword, n) ((dword) << (n) ^ ((dword) >> (32 - (n))))
205#define ROTR32(dword, n) ((dword) >> (n) ^ ((dword) << (32 - (n))))
206#define ROTL64(qword, n) ((qword) << (n) ^ ((qword) >> (64 - (n))))
207#define ROTR64(qword, n) ((qword) >> (n) ^ ((qword) << (64 - (n))))
208
209#ifdef __cplusplus
210} /* extern "C" */
211#endif /* __cplusplus */
212
213#endif /* BYTE_ORDER_H */
bswap_64
static UInt64_t bswap_64(x) UInt64_t x
ll
w ll
Definition: byte_order.h:167
l
r l[0]
Definition: byte_order.h:168
bswap_32
#define bswap_32(x)
Definition: byteswap.h:34
idx
unsigned int idx
Definition: utils.c:41
x
GLint GLint GLint GLint GLint x
Definition: gl.h:1548
r
GLdouble GLdouble GLdouble r
Definition: gl.h:2055
length
GLuint GLsizei GLsizei * length
Definition: glext.h:6040
p
GLfloat GLfloat p
Definition: glext.h:8902
w
GLubyte GLubyte GLubyte GLubyte w
Definition: glext.h:6102
__PR
#define __PR(a)
Definition: prototyp.h:106
from
CardRegion * from
Definition: spigame.cpp:19