integers.h revision 386ce4d9144fc190797f4e43a31aeaf76ca2e373
1/*
2 * integers.h
3 *
4 * defines integer types (or refers to their definitions)
5 *
6 * David A. McGrew
7 * Cisco Systems, Inc.
8 */
9
10/*
11 *
12 * Copyright (c) 2001-2006, Cisco Systems, Inc.
13 * All rights reserved.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 *
19 *   Redistributions of source code must retain the above copyright
20 *   notice, this list of conditions and the following disclaimer.
21 *
22 *   Redistributions in binary form must reproduce the above
23 *   copyright notice, this list of conditions and the following
24 *   disclaimer in the documentation and/or other materials provided
25 *   with the distribution.
26 *
27 *   Neither the name of the Cisco Systems, Inc. nor the names of its
28 *   contributors may be used to endorse or promote products derived
29 *   from this software without specific prior written permission.
30 *
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
34 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
35 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
36 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
37 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
38 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
41 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
42 * OF THE POSSIBILITY OF SUCH DAMAGE.
43 *
44 */
45
46
47#ifndef INTEGERS_H
48#define INTEGERS_H
49
50#include "config.h"	/* configuration file, using autoconf          */
51
52#ifdef SRTP_KERNEL
53
54#include "kernel_compat.h"
55
56#else /* SRTP_KERNEL */
57
58/* use standard integer definitions, if they're available  */
59#ifdef HAVE_STDLIB_H
60# include <stdlib.h>
61#endif
62#ifdef HAVE_STDINT_H
63# include <stdint.h>
64#endif
65#ifdef HAVE_INTTYPES_H
66# include <inttypes.h>
67#endif
68#ifdef HAVE_SYS_TYPES_H
69# include <sys/types.h>
70#endif
71#ifdef HAVE_SYS_INT_TYPES_H
72# include <sys/int_types.h>    /* this exists on Sun OS */
73#endif
74#ifdef HAVE_MACHINE_TYPES_H
75# include <machine/types.h>
76#endif
77
78/* Can we do 64 bit integers? */
79#ifndef HAVE_UINT64_T
80# if SIZEOF_UNSIGNED_LONG == 8
81typedef unsigned long		uint64_t;
82# elif SIZEOF_UNSIGNED_LONG_LONG == 8
83typedef unsigned long long	uint64_t;
84# else
85#  define NO_64BIT_MATH 1
86# endif
87#endif
88
89/* Reasonable defaults for 32 bit machines - you may need to
90 * edit these definitions for your own machine. */
91#ifndef HAVE_UINT8_T
92typedef unsigned char		uint8_t;
93#endif
94#ifndef HAVE_UINT16_T
95typedef unsigned short int	uint16_t;
96#endif
97#ifndef HAVE_UINT32_T
98typedef unsigned int		uint32_t;
99#endif
100
101#ifdef NO_64BIT_MATH
102typedef double uint64_t;
103/* assert that sizeof(double) == 8 */
104extern uint64_t make64(uint32_t high, uint32_t low);
105extern uint32_t high32(uint64_t value);
106extern uint32_t low32(uint64_t value);
107#endif
108
109#endif /* SRTP_KERNEL */
110
111/* These macros are to load and store 32-bit values from un-aligned
112   addresses.  This is required for processors that do not allow unaligned
113   loads. */
114#ifdef ALIGNMENT_32BIT_REQUIRED
115/* Note that if it's in a variable, you can memcpy it */
116#ifdef WORDS_BIGENDIAN
117#define PUT_32(addr,value) \
118    { \
119        ((unsigned char *) (addr))[0] = (value >> 24); \
120        ((unsigned char *) (addr))[1] = (value >> 16) & 0xff; \
121        ((unsigned char *) (addr))[2] = (value >> 8) & 0xff; \
122        ((unsigned char *) (addr))[3] = (value)      & 0xff; \
123    }
124#define GET_32(addr) ((((unsigned char *) (addr))[0] << 24) |  \
125                      (((unsigned char *) (addr))[1] << 16) |  \
126                      (((unsigned char *) (addr))[2] << 8)  |  \
127                      (((unsigned char *) (addr))[3]))
128#else
129#define PUT_32(addr,value) \
130    { \
131        ((unsigned char *) (addr))[3] = (value >> 24); \
132        ((unsigned char *) (addr))[2] = (value >> 16) & 0xff; \
133        ((unsigned char *) (addr))[1] = (value >> 8) & 0xff; \
134        ((unsigned char *) (addr))[0] = (value)      & 0xff; \
135    }
136#define GET_32(addr) ((((unsigned char *) (addr))[3] << 24) |  \
137                      (((unsigned char *) (addr))[2] << 16) |  \
138                      (((unsigned char *) (addr))[1] << 8)  |  \
139                      (((unsigned char *) (addr))[0]))
140#endif // WORDS_BIGENDIAN
141#else
142#define PUT_32(addr,value) *(((uint32_t *) (addr)) = (value)
143#define GET_32(addr) (*(((uint32_t *) (addr)))
144#endif
145
146#endif /* INTEGERS_H */
147