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/*
* Copyright (c) 1999 by Sun Microsystems, Inc.
* All rights reserved.
*/
/*
* Cylink Corporation © 1998
*
* This software is licensed by Cylink to the Internet Software Consortium to
* promote implementation of royalty free public key cryptography within IETF
* standards. Cylink wishes to expressly thank the contributions of Dr.
* Martin Hellman, Whitfield Diffie, Ralph Merkle and Stanford University for
* their contributions to Internet Security. In accordance with the terms of
* this license, ISC is authorized to distribute and sublicense this software
* for the practice of IETF standards.
*
* The software includes BigNum, written by Colin Plumb and licensed by Philip
* R. Zimmermann for royalty free use and distribution with Cylink's
* software. Use of BigNum as a stand alone product or component is
* specifically prohibited.
*
* Disclaimer of All Warranties. THIS SOFTWARE IS BEING PROVIDED "AS IS",
* WITHOUT ANY EXPRESSED OR IMPLIED WARRANTY OF ANY KIND WHATSOEVER. IN
* PARTICULAR, WITHOUT LIMITATION ON THE GENERALITY OF THE FOREGOING, CYLINK
* MAKES NO REPRESENTATION OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
* PURPOSE.
*
* Cylink or its representatives shall not be liable for tort, indirect,
* special or consequential damages such as loss of profits or loss of
* goodwill from the use or inability to use the software for any purpose or
* for any reason whatsoever.
*
* EXPORT LAW: Export of the Foundations Suite may be subject to compliance
* with the rules and regulations promulgated from time to time by the Bureau
* of Export Administration, United States Department of Commerce, which
* restrict the export and re-export of certain products and technical data.
* If the export of the Foundations Suite is controlled under such rules and
* regulations, then the Foundations Suite shall not be exported or
* re-exported, directly or indirectly, (a) without all export or re-export
* licenses and governmental approvals required by any applicable laws, or (b)
* in violation of any applicable prohibition against the export or re-export
* of any part of the Foundations Suite. All export licenses for software
* containing the Foundations Suite are the sole responsibility of the licensee.
*/
/*
* lbn.h - Low-level bignum header.
* Defines various word sizes and useful macros.
*
* Copyright (c) 1995 Colin Plumb. All rights reserved.
* For licensing and other legal details, see the file legal.c.
*/
#ifndef LBN_H
#define LBN_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifndef HAVE_CONFIG_H
#define HAVE_CONFIG_H 0
#endif
#if HAVE_CONFIG_H
#include "config.h"
#endif
/*
* Some compilers complain about #if FOO if FOO isn't defined,
* so do the ANSI-mandated thing explicitly...
*/
#ifndef NO_LIMITS_H
#define NO_LIMITS_H 0
#endif
/* Make sure we have 8-bit bytes */
#if !NO_LIMITS_H
#include <limits.h>
#if UCHAR_MAX != 0xff || CHAR_BIT != 8
#error The bignum library requires 8-bit unsigned characters.
#endif
#endif /* !NO_LIMITS_H */
#ifdef BNINCLUDE /* If this is defined as, say, foo.h */
#define STR(x) #x /* STR(BNINCLUDE) -> "BNINCLUDE" */
#define XSTR(x) STR(x) /* XSTR(BNINCLUDE) -> STR(foo.h) -> "foo.h" */
#include XSTR(BNINCLUDE) /* #include "foo.h" */
#undef XSTR
#undef STR
#endif
/* Figure out the endianness */
/* Error if more than one is defined */
#if BN_BIG_ENDIAN && BN_LITTLE_ENDIAN
#error Only one of BN_BIG_ENDIAN or BN_LITTLE_ENDIAN may be defined
#endif
/*
* If no preference is stated, little-endian C code is slightly more
* efficient, so prefer that. (The endianness here does NOT have to
* match the machine's native byte sex; the library's C code will work
* either way. The flexibility is allowed for assembly routines
* that do care.
*/
#if !defined(BN_BIG_ENDIAN) && !defined(BN_LITTLE_ENDIAN)
#define BN_LITTLE_ENDIAN 1
#endif /* !BN_BIG_ENDIAN && !BN_LITTLE_ENDIAN */
/* Macros to choose between big and little endian */
#if BN_BIG_ENDIAN
#define BIG(b) b
#define LITTLE(l) /*nothing*/
#define BIGLITTLE(b,l) b
#elif BN_LITTLE_ENDIAN
#define BIG(b) /*nothing*/
#define LITTLE(l) l
#define BIGLITTLE(b,l) l
#else
#error One of BN_BIG_ENDIAN or BN_LITTLE_ENDIAN must be defined as 1
#endif
/*
* Find a 16-bit unsigned type.
* Unsigned short is preferred over unsigned int to make the type chosen
* by this file more stable on platforms (such as many 68000 compilers)
* which support both 16- and 32-bit ints.
*/
#ifndef BNWORD16
#ifndef USHRT_MAX /* No <limits.h> available - guess */
typedef unsigned short bnword16;
#define BNWORD16 bnword16
#elif USHRT_MAX == 0xffff
typedef unsigned short bnword16;
#define BNWORD16 bnword16
#elif UINT_MAX == 0xffff
typedef unsigned bnword16;
#define BNWORD16 bnword16
#endif
#endif /* BNWORD16 */
/*
* Find a 32-bit unsigned type.
* Unsigned long is preferred over unsigned int to make the type chosen
* by this file more stable on platforms (such as many 68000 compilers)
* which support both 16- and 32-bit ints.
*/
#ifndef BNWORD32
#ifndef ULONG_MAX /* No <limits.h> available - guess */
typedef unsigned long bnword32;
#define BNWORD32 bnword32
#elif ULONG_MAX == 0xfffffffful
typedef unsigned long bnword32;
#define BNWORD32 bnword32
#elif UINT_MAX == 0xffffffff
typedef unsigned bnword32;
#define BNWORD32 bnword32
#elif USHRT_MAX == 0xffffffff
typedef unsigned short bnword32;
#define BNWORD32 bnword32
#endif
#endif /* BNWORD16 */
/*
* Find a 64-bit unsigned type.
* The conditions here are more complicated to avoid using numbers that
* will choke lesser preprocessors (like 0xffffffffffffffff) unless
* we're reasonably certain that they'll be acceptable.
*/
#if !defined(BNWORD64) && ULONG_MAX > 0xfffffffful
#if ULONG_MAX == 0xffffffffffffffff
typedef unsigned long bnword64;
#define BNWORD64 bnword64
#endif
#endif
#if 0
/*
* I would test the value of unsigned long long, but some *preprocessors*
* don't constants that long even if the compiler can accept them, so it
* doesn't work reliably. So cross our fingers and hope that it's a 64-bit
* type.
*
* GCC uses ULONG_LONG_MAX. Solaris uses ULLONG_MAX. IRIX uses ULONGLONG_MAX.
* Are there any other names for this?
*/
#if !defined(BNWORD64) && \
(defined(ULONG_LONG_MAX) || defined (ULLONG_MAX) || defined(ULONGLONG_MAX))
typedef unsigned long long bnword64;
#define BNWORD64 bnword64
#endif
#endif
/* We don't even try to find a 128-bit type at the moment */
#endif /* !LBN_H */
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