151 lines
4.6 KiB
C
151 lines
4.6 KiB
C
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/*
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* integers.h
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*
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* defines integer types (or refers to their definitions)
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*
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* David A. McGrew
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* Cisco Systems, Inc.
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*/
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/*
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*
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* Copyright (c) 2001-2017, Cisco Systems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* Neither the name of the Cisco Systems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef INTEGERS_H
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#define INTEGERS_H
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/* use standard integer definitions, if they're available */
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#ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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#endif
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#ifdef HAVE_STDINT_H
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# include <stdint.h>
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#endif
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#ifdef HAVE_INTTYPES_H
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# include <inttypes.h>
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#endif
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#ifdef HAVE_SYS_INT_TYPES_H
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# include <sys/int_types.h> /* this exists on Sun OS */
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#endif
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#ifdef HAVE_MACHINE_TYPES_H
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# include <machine/types.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Can we do 64 bit integers? */
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#if !defined(HAVE_UINT64_T)
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# if SIZEOF_UNSIGNED_LONG == 8
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typedef unsigned long uint64_t;
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# elif SIZEOF_UNSIGNED_LONG_LONG == 8
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typedef unsigned long long uint64_t;
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# else
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# define NO_64BIT_MATH 1
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# endif
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#endif
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/* Reasonable defaults for 32 bit machines - you may need to
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* edit these definitions for your own machine. */
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#ifndef HAVE_UINT8_T
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typedef unsigned char uint8_t;
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#endif
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#ifndef HAVE_UINT16_T
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typedef unsigned short int uint16_t;
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#endif
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#ifndef HAVE_UINT32_T
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typedef unsigned int uint32_t;
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#endif
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#ifndef HAVE_INT32_T
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typedef int int32_t;
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#endif
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#if defined(NO_64BIT_MATH) && defined(HAVE_CONFIG_H)
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typedef double uint64_t;
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/* assert that sizeof(double) == 8 */
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extern uint64_t make64(uint32_t high, uint32_t low);
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extern uint32_t high32(uint64_t value);
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extern uint32_t low32(uint64_t value);
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#endif
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/* These macros are to load and store 32-bit values from un-aligned
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addresses. This is required for processors that do not allow unaligned
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loads. */
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#ifdef ALIGNMENT_32BIT_REQUIRED
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/* Note that if it's in a variable, you can memcpy it */
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#ifdef WORDS_BIGENDIAN
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#define PUT_32(addr,value) \
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{ \
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((unsigned char *) (addr))[0] = (value >> 24); \
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((unsigned char *) (addr))[1] = (value >> 16) & 0xff; \
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((unsigned char *) (addr))[2] = (value >> 8) & 0xff; \
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((unsigned char *) (addr))[3] = (value) & 0xff; \
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}
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#define GET_32(addr) ((((unsigned char *) (addr))[0] << 24) | \
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(((unsigned char *) (addr))[1] << 16) | \
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(((unsigned char *) (addr))[2] << 8) | \
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(((unsigned char *) (addr))[3]))
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#else
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#define PUT_32(addr,value) \
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{ \
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((unsigned char *) (addr))[3] = (value >> 24); \
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((unsigned char *) (addr))[2] = (value >> 16) & 0xff; \
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((unsigned char *) (addr))[1] = (value >> 8) & 0xff; \
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((unsigned char *) (addr))[0] = (value) & 0xff; \
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}
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#define GET_32(addr) ((((unsigned char *) (addr))[3] << 24) | \
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(((unsigned char *) (addr))[2] << 16) | \
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(((unsigned char *) (addr))[1] << 8) | \
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(((unsigned char *) (addr))[0]))
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#endif // WORDS_BIGENDIAN
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#else
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#define PUT_32(addr,value) *(((uint32_t *) (addr)) = (value)
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#define GET_32(addr) (*(((uint32_t *) (addr)))
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* INTEGERS_H */
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