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Root/tags/2.0/i386/include/libkern/OSByteOrder.h

Source at commit 1808 created 12 years 4 months ago.
By blackosx, Revise layout of package installer 'Welcome' file so it looks cleaner. Change the copyright notice to begin from 2009 as seen in the Chameleon 2.0 r431 installer. Should this date be set earlier?
1/*␊
2 * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.␊
3 *␊
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@␊
5 * ␊
6 * This file contains Original Code and/or Modifications of Original Code␊
7 * as defined in and that are subject to the Apple Public Source License␊
8 * Version 2.0 (the 'License'). You may not use this file except in␊
9 * compliance with the License. The rights granted to you under the License␊
10 * may not be used to create, or enable the creation or redistribution of,␊
11 * unlawful or unlicensed copies of an Apple operating system, or to␊
12 * circumvent, violate, or enable the circumvention or violation of, any␊
13 * terms of an Apple operating system software license agreement.␊
14 * ␊
15 * Please obtain a copy of the License at␊
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.␊
17 * ␊
18 * The Original Code and all software distributed under the License are␊
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.␊
23 * Please see the License for the specific language governing rights and␊
24 * limitations under the License.␊
25 * ␊
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@␊
27 */␊
28␊
29#ifndef _OS_OSBYTEORDER_H␊
30#define _OS_OSBYTEORDER_H␊
31␊
32#include <stdint.h>␊
33#include <libkern/_OSByteOrder.h>␊
34␊
35/* Macros for swapping constant values in the preprocessing stage. */␊
36#define OSSwapConstInt16(x)␉__DARWIN_OSSwapConstInt16(x)␊
37#define OSSwapConstInt32(x)␉__DARWIN_OSSwapConstInt32(x)␊
38#define OSSwapConstInt64(x)␉__DARWIN_OSSwapConstInt64(x)␊
39␊
40#if defined(__GNUC__)␊
41␊
42#if (defined(__ppc__) || defined(__ppc64__))␊
43#include <libkern/ppc/OSByteOrder.h>␊
44#elif (defined(__i386__) || defined(__x86_64__))␊
45#include <libkern/i386/OSByteOrder.h>␊
46#elif defined(__arm__)␊
47#include <libkern/arm/OSByteOrder.h>␊
48#else␊
49#include <libkern/machine/OSByteOrder.h>␊
50#endif␊
51␊
52#else /* ! __GNUC__ */␊
53␊
54#include <libkern/machine/OSByteOrder.h>␊
55␊
56#endif /* __GNUC__ */␊
57␊
58#define OSSwapInt16(x)␉__DARWIN_OSSwapInt16(x)␊
59#define OSSwapInt32(x)␉__DARWIN_OSSwapInt32(x)␊
60#define OSSwapInt64(x)␉__DARWIN_OSSwapInt64(x)␊
61␊
62enum {␊
63 OSUnknownByteOrder,␊
64 OSLittleEndian,␊
65 OSBigEndian␊
66};␊
67␊
68OS_INLINE␊
69int32_t␊
70OSHostByteOrder(void) {␊
71#if defined(__LITTLE_ENDIAN__)␊
72 return OSLittleEndian;␊
73#elif defined(__BIG_ENDIAN__)␊
74 return OSBigEndian;␊
75#else␊
76 return OSUnknownByteOrder;␊
77#endif␊
78}␊
79␊
80#define OSReadBigInt(x, y)␉␉OSReadBigInt32(x, y)␊
81#define OSWriteBigInt(x, y, z)␉␉OSWriteBigInt32(x, y, z)␊
82#define OSSwapBigToHostInt(x)␉␉OSSwapBigToHostInt32(x)␊
83#define OSSwapHostToBigInt(x)␉␉OSSwapHostToBigInt32(x)␊
84#define OSReadLittleInt(x, y)␉␉OSReadLittleInt32(x, y)␊
85#define OSWriteLittleInt(x, y, z)␉OSWriteLittleInt32(x, y, z)␊
86#define OSSwapHostToLittleInt(x)␉OSSwapHostToLittleInt32(x)␊
87#define OSSwapLittleToHostInt(x)␉OSSwapLittleToHostInt32(x)␊
88␊
89/* Functions for loading native endian values. */␊
90␊
91OS_INLINE␊
92uint16_t␊
93_OSReadInt16(␊
94 const volatile void * base,␊
95 uintptr_t byteOffset␊
96)␊
97{␊
98 return *(volatile uint16_t *)((uintptr_t)base + byteOffset);␊
99}␊
100␊
101OS_INLINE␊
102uint32_t␊
103_OSReadInt32(␊
104 const volatile void * base,␊
105 uintptr_t byteOffset␊
106)␊
107{␊
108 return *(volatile uint32_t *)((uintptr_t)base + byteOffset);␊
109}␊
110␊
111OS_INLINE␊
112uint64_t␊
113_OSReadInt64(␊
114 const volatile void * base,␊
115 uintptr_t byteOffset␊
116)␊
117{␊
118 return *(volatile uint64_t *)((uintptr_t)base + byteOffset);␊
119}␊
120␊
121/* Functions for storing native endian values. */␊
122␊
123OS_INLINE␊
124void␊
125_OSWriteInt16(␊
126 volatile void * base,␊
127 uintptr_t byteOffset,␊
128 uint16_t data␊
129)␊
130{␊
131 *(volatile uint16_t *)((uintptr_t)base + byteOffset) = data;␊
132}␊
133␊
134OS_INLINE␊
135void␊
136_OSWriteInt32(␊
137 volatile void * base,␊
138 uintptr_t byteOffset,␊
139 uint32_t data␊
140)␊
141{␊
142 *(volatile uint32_t *)((uintptr_t)base + byteOffset) = data;␊
143}␊
144␊
145OS_INLINE␊
146void␊
147_OSWriteInt64(␊
148 volatile void * base,␊
149 uintptr_t byteOffset,␊
150 uint64_t data␊
151)␊
152{␊
153 *(volatile uint64_t *)((uintptr_t)base + byteOffset) = data;␊
154}␊
155␊
156#if␉␉defined(__BIG_ENDIAN__)␊
157␊
158/* Functions for loading big endian to host endianess. */␊
159␊
160#define OSReadBigInt16(base, byteOffset) _OSReadInt16(base, byteOffset)␊
161#define OSReadBigInt32(base, byteOffset) _OSReadInt32(base, byteOffset)␊
162#define OSReadBigInt64(base, byteOffset) _OSReadInt64(base, byteOffset)␊
163␊
164/* Functions for storing host endianess to big endian. */␊
165␊
166#define OSWriteBigInt16(base, byteOffset, data) _OSWriteInt16(base, byteOffset, data)␊
167#define OSWriteBigInt32(base, byteOffset, data) _OSWriteInt32(base, byteOffset, data)␊
168#define OSWriteBigInt64(base, byteOffset, data) _OSWriteInt64(base, byteOffset, data)␊
169␊
170/* Functions for loading little endian to host endianess. */␊
171␊
172#define OSReadLittleInt16(base, byteOffset) OSReadSwapInt16(base, byteOffset)␊
173#define OSReadLittleInt32(base, byteOffset) OSReadSwapInt32(base, byteOffset)␊
174#define OSReadLittleInt64(base, byteOffset) OSReadSwapInt64(base, byteOffset)␊
175␊
176/* Functions for storing host endianess to little endian. */␊
177␊
178#define OSWriteLittleInt16(base, byteOffset, data) OSWriteSwapInt16(base, byteOffset, data)␊
179#define OSWriteLittleInt32(base, byteOffset, data) OSWriteSwapInt32(base, byteOffset, data)␊
180#define OSWriteLittleInt64(base, byteOffset, data) OSWriteSwapInt64(base, byteOffset, data)␊
181␊
182/* Host endianess to big endian byte swapping macros for constants. */␊
183␊
184#define OSSwapHostToBigConstInt16(x) ((uint16_t)(x))␊
185#define OSSwapHostToBigConstInt32(x) ((uint32_t)(x))␊
186#define OSSwapHostToBigConstInt64(x) ((uint64_t)(x))␊
187␊
188/* Generic host endianess to big endian byte swapping functions. */␊
189␊
190#define OSSwapHostToBigInt16(x) ((uint16_t)(x))␊
191#define OSSwapHostToBigInt32(x) ((uint32_t)(x))␊
192#define OSSwapHostToBigInt64(x) ((uint64_t)(x))␊
193␊
194/* Host endianess to little endian byte swapping macros for constants. */␊
195␊
196#define OSSwapHostToLittleConstInt16(x) OSSwapConstInt16(x)␊
197#define OSSwapHostToLittleConstInt32(x) OSSwapConstInt32(x) ␊
198#define OSSwapHostToLittleConstInt64(x) OSSwapConstInt64(x) ␊
199␊
200/* Generic host endianess to little endian byte swapping functions. */␊
201␊
202#define OSSwapHostToLittleInt16(x) OSSwapInt16(x)␊
203#define OSSwapHostToLittleInt32(x) OSSwapInt32(x)␊
204#define OSSwapHostToLittleInt64(x) OSSwapInt64(x)␊
205␊
206/* Big endian to host endianess byte swapping macros for constants. */␊
207 ␊
208#define OSSwapBigToHostConstInt16(x) ((uint16_t)(x))␊
209#define OSSwapBigToHostConstInt32(x) ((uint32_t)(x))␊
210#define OSSwapBigToHostConstInt64(x) ((uint64_t)(x))␊
211␊
212/* Generic big endian to host endianess byte swapping functions. */␊
213␊
214#define OSSwapBigToHostInt16(x) ((uint16_t)(x))␊
215#define OSSwapBigToHostInt32(x) ((uint32_t)(x))␊
216#define OSSwapBigToHostInt64(x) ((uint64_t)(x))␊
217␊
218/* Little endian to host endianess byte swapping macros for constants. */␊
219 ␊
220#define OSSwapLittleToHostConstInt16(x) OSSwapConstInt16(x)␊
221#define OSSwapLittleToHostConstInt32(x) OSSwapConstInt32(x)␊
222#define OSSwapLittleToHostConstInt64(x) OSSwapConstInt64(x)␊
223␊
224/* Generic little endian to host endianess byte swapping functions. */␊
225␊
226#define OSSwapLittleToHostInt16(x) OSSwapInt16(x)␊
227#define OSSwapLittleToHostInt32(x) OSSwapInt32(x)␊
228#define OSSwapLittleToHostInt64(x) OSSwapInt64(x)␊
229␊
230#elif␉␉defined(__LITTLE_ENDIAN__)␊
231␊
232/* Functions for loading big endian to host endianess. */␊
233␊
234#define OSReadBigInt16(base, byteOffset) OSReadSwapInt16(base, byteOffset)␊
235#define OSReadBigInt32(base, byteOffset) OSReadSwapInt32(base, byteOffset)␊
236#define OSReadBigInt64(base, byteOffset) OSReadSwapInt64(base, byteOffset)␊
237␊
238/* Functions for storing host endianess to big endian. */␊
239␊
240#define OSWriteBigInt16(base, byteOffset, data) OSWriteSwapInt16(base, byteOffset, data)␊
241#define OSWriteBigInt32(base, byteOffset, data) OSWriteSwapInt32(base, byteOffset, data)␊
242#define OSWriteBigInt64(base, byteOffset, data) OSWriteSwapInt64(base, byteOffset, data)␊
243␊
244/* Functions for loading little endian to host endianess. */␊
245␊
246#define OSReadLittleInt16(base, byteOffset) _OSReadInt16(base, byteOffset)␊
247#define OSReadLittleInt32(base, byteOffset) _OSReadInt32(base, byteOffset)␊
248#define OSReadLittleInt64(base, byteOffset) _OSReadInt64(base, byteOffset)␊
249␊
250/* Functions for storing host endianess to little endian. */␊
251␊
252#define OSWriteLittleInt16(base, byteOffset, data) _OSWriteInt16(base, byteOffset, data)␊
253#define OSWriteLittleInt32(base, byteOffset, data) _OSWriteInt32(base, byteOffset, data)␊
254#define OSWriteLittleInt64(base, byteOffset, data) _OSWriteInt64(base, byteOffset, data)␊
255␊
256/* Host endianess to big endian byte swapping macros for constants. */␊
257␊
258#define OSSwapHostToBigConstInt16(x) OSSwapConstInt16(x)␊
259#define OSSwapHostToBigConstInt32(x) OSSwapConstInt32(x)␊
260#define OSSwapHostToBigConstInt64(x) OSSwapConstInt64(x)␊
261␊
262/* Generic host endianess to big endian byte swapping functions. */␊
263␊
264#define OSSwapHostToBigInt16(x) OSSwapInt16(x)␊
265#define OSSwapHostToBigInt32(x) OSSwapInt32(x)␊
266#define OSSwapHostToBigInt64(x) OSSwapInt64(x)␊
267␊
268/* Host endianess to little endian byte swapping macros for constants. */␊
269␊
270#define OSSwapHostToLittleConstInt16(x) ((uint16_t)(x))␊
271#define OSSwapHostToLittleConstInt32(x) ((uint32_t)(x))␊
272#define OSSwapHostToLittleConstInt64(x) ((uint64_t)(x)) ␊
273␊
274/* Generic host endianess to little endian byte swapping functions. */␊
275␊
276#define OSSwapHostToLittleInt16(x) ((uint16_t)(x))␊
277#define OSSwapHostToLittleInt32(x) ((uint32_t)(x))␊
278#define OSSwapHostToLittleInt64(x) ((uint64_t)(x))␊
279␊
280/* Big endian to host endianess byte swapping macros for constants. */␊
281␊
282#define OSSwapBigToHostConstInt16(x) OSSwapConstInt16(x)␊
283#define OSSwapBigToHostConstInt32(x) OSSwapConstInt32(x)␊
284#define OSSwapBigToHostConstInt64(x) OSSwapConstInt64(x)␊
285␊
286/* Generic big endian to host endianess byte swapping functions. */␊
287␊
288#define OSSwapBigToHostInt16(x) OSSwapInt16(x)␊
289#define OSSwapBigToHostInt32(x) OSSwapInt32(x)␊
290#define OSSwapBigToHostInt64(x) OSSwapInt64(x)␊
291␊
292/* Little endian to host endianess byte swapping macros for constants. */␊
293␊
294#define OSSwapLittleToHostConstInt16(x) ((uint16_t)(x))␊
295#define OSSwapLittleToHostConstInt32(x) ((uint32_t)(x))␊
296#define OSSwapLittleToHostConstInt64(x) ((uint64_t)(x))␊
297␊
298/* Generic little endian to host endianess byte swapping functions. */␊
299␊
300#define OSSwapLittleToHostInt16(x) ((uint16_t)(x))␊
301#define OSSwapLittleToHostInt32(x) ((uint32_t)(x))␊
302#define OSSwapLittleToHostInt64(x) ((uint64_t)(x))␊
303␊
304#else␊
305#error Unknown endianess.␊
306#endif␊
307␊
308#endif /* ! _OS_OSBYTEORDER_H */␊
309␊
310␊
311

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