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/* coding/decoding base definitions */
#include<stdlib.h>
#include<string.h>
/* determine the endianness */
#if defined __linux
# include <endian.h>
# if !defined BYTE_ORDER
# define BYTE_ORDER __BYTE_ORDER
# define LITTLE_ENDIAN __LITTLE_ENDIAN
# define BIG_ENDIAN __BIG_ENDIAN
# endif /* !defined BYTE_ORDER */
#elif defined _AIX
# include <sys/machine.h>
#elif defined __alpha
# include <machine/endian.h>
#elif defined __sun || defined __hpux
# include <sys/byteorder.h>
# if !defined BYTE_ORDER
# define LITTLE_ENDIAN 1234
# define BIG_ENDIAN 4321
# if !defined _LITTLE_ENDIAN && !defined _BIG_ENDIAN
# ifdef ntohl
# define _LITTLE_ENDIAN
# else /* !defined ntohl */
# define _BIG_ENDIAN
# endif /* !defined ntohl */
# endif /* !defined _LITTLE_ENDIAN && !defined _BIG_ENDIAN */
# if defined _LITTLE_ENDIAN
# define BYTE_ORDER LITTLE_ENDIAN
# elif defined _BIG_ENDIAN
# define BYTE_ORDER BIG_ENDIAN
# endif /* little/big endian */
# endif /* !defined BYTE_ORDER */
#elif defined __sgi
# include <standards.h>
# include <sys/endian.h>
#elif !defined BYTE_ORDER
# define LITTLE_ENDIAN 1234
# define BIG_ENDIAN 4321
# if defined __i386
# define BYTE_ORDER LITTLE_ENDIAN
# else
# error "cannot determine the byte order"
# endif
#endif
/** @file runtime/codec.h
* Definitions for encoding and decoding values
*/
/* Copyright 2000-2002 Marko Mkel (msmakela@tcs.hut.fi).
This file is part of MARIA, a reachability analyzer and model checker
for high-level Petri nets.
MARIA is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
MARIA is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
The GNU General Public License is often shipped with GNU software, and
is generally kept in a file called COPYING or LICENSE. If you do not
have a copy of the license, write to the Free Software Foundation,
59 Temple Place, Suite 330, Boston, MA 02111 USA. */
/* Machine word */
#if (BYTE_ORDER == BIG_ENDIAN || BYTE_ORDER == LITTLE_ENDIAN)
/** Machine word */
typedef unsigned long word_t;
#else /* mixed-endian */
/** Machine word */
typedef unsigned char word_t;
#endif /* BYTE_ORDER */
#define WORD_T_BIT (CHAR_BIT * sizeof (word_t))
/** number of words a specified amount of bits takes */
#define NUM_WORDS(bits) (((bits) + (WORD_T_BIT - 1)) / WORD_T_BIT)
/** number of bytes a specified amount of bits takes */
#define NUM_BYTES(bits) (((bits) + (CHAR_BIT - 1)) / CHAR_BIT)
/** number of words a specified amount of bytes takes */
#define NUM_WORD_B(bytes) (((bytes) + (sizeof (word_t) - 1)) / sizeof (word_t))
/* determine whether CHAR_BIT is a power of 2 */
#if (CHAR_BIT - 1) & CHAR_BIT
/** Round up a bit amount to the nearest multiple of the machine word length */
# define ROUNDUP_WORDS(bits) (NUM_WORDS(bits) * WORD_T_BIT)
/** Round up a bit amount to the nearest multiple of byte length */
# define ROUNDUP_BYTES(bits) (NUM_BYTES(bits) * CHAR_BIT)
#else
/** Round up a bit amount to the nearest multiple of the machine word length */
# define ROUNDUP_WORDS(bits) (((bits) + (WORD_T_BIT - 1)) & ~(WORD_T_BIT - 1))
/** Round up a bit amount to the nearest multiple of byte length */
# define ROUNDUP_BYTES(bits) (((bits) + (CHAR_BIT - 1)) & ~(CHAR_BIT - 1))
#endif
/** encoding variable */
#define ENCVAR(x) FCN(enc##_##x)
/** decoding variable */
#define DECVAR(x) FCN(dec##_##x)
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