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/*
* k5-platform.h
*
* Copyright 2003 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
*
* Some platform-dependent definitions to sync up the C support level.
* Some to a C99-ish level, some related utility code.
*
* Currently: make "static inline" work; 64-bit types and load/store
* code; SIZE_MAX.
*/
#ifndef K5_PLATFORM_H
#define K5_PLATFORM_H
#if !defined(inline)
# if __STDC_VERSION__ >= 199901L
/* C99 supports inline, don't do anything. */
# elif defined(__GNUC__)
# define inline __inline__ /* this form silences -pedantic warnings */
# elif defined(__mips) && defined(__sgi)
# define inline __inline /* IRIX used at MIT does inline but not c99 yet */
# elif defined(__sun) && __SUNPRO_C >= 0x540
/* The Forte Developer 7 C compiler supports "inline". */
# elif defined(_WIN32)
# define inline __inline
# else
# define inline /* nothing, just static */
# endif
#endif
#include "autoconf.h"
/* 64-bit support: krb5_ui_8 and krb5_int64.
This should move to krb5.h eventually, but without the namespace
pollution from the autoconf macros. */
#if defined(HAVE_STDINT_H) || defined(HAVE_INTTYPES_H)
# ifdef HAVE_STDINT_H
# include <stdint.h>
# endif
# ifdef HAVE_INTTYPES_H
# include <inttypes.h>
# endif
# define INT64_TYPE int64_t
# define UINT64_TYPE uint64_t
#elif defined(_WIN32)
# define INT64_TYPE signed __int64
# define UINT64_TYPE unsigned __int64
#else /* not Windows, and neither stdint.h nor inttypes.h */
# define INT64_TYPE signed long long
# define UINT64_TYPE unsigned long long
#endif
#ifndef SIZE_MAX
# define SIZE_MAX ((size_t)((size_t)0 - 1))
#endif
/* Read and write integer values as (unaligned) octet strings in
specific byte orders.
Add per-platform optimizations later if needed. (E.g., maybe x86
unaligned word stores and gcc/asm instructions for byte swaps,
etc.) */
static inline void
store_16_be (unsigned int val, unsigned char *p)
{
p[0] = (val >> 8) & 0xff;
p[1] = (val ) & 0xff;
}
static inline void
store_16_le (unsigned int val, unsigned char *p)
{
p[1] = (val >> 8) & 0xff;
p[0] = (val ) & 0xff;
}
static inline void
store_32_be (unsigned int val, unsigned char *p)
{
p[0] = (val >> 24) & 0xff;
p[1] = (val >> 16) & 0xff;
p[2] = (val >> 8) & 0xff;
p[3] = (val ) & 0xff;
}
static inline void
store_32_le (unsigned int val, unsigned char *p)
{
p[3] = (val >> 24) & 0xff;
p[2] = (val >> 16) & 0xff;
p[1] = (val >> 8) & 0xff;
p[0] = (val ) & 0xff;
}
static inline void
store_64_be (UINT64_TYPE val, unsigned char *p)
{
p[0] = (unsigned char)((val >> 56) & 0xff);
p[1] = (unsigned char)((val >> 48) & 0xff);
p[2] = (unsigned char)((val >> 40) & 0xff);
p[3] = (unsigned char)((val >> 32) & 0xff);
p[4] = (unsigned char)((val >> 24) & 0xff);
p[5] = (unsigned char)((val >> 16) & 0xff);
p[6] = (unsigned char)((val >> 8) & 0xff);
p[7] = (unsigned char)((val ) & 0xff);
}
static inline void
store_64_le (UINT64_TYPE val, unsigned char *p)
{
p[7] = (unsigned char)((val >> 56) & 0xff);
p[6] = (unsigned char)((val >> 48) & 0xff);
p[5] = (unsigned char)((val >> 40) & 0xff);
p[4] = (unsigned char)((val >> 32) & 0xff);
p[3] = (unsigned char)((val >> 24) & 0xff);
p[2] = (unsigned char)((val >> 16) & 0xff);
p[1] = (unsigned char)((val >> 8) & 0xff);
p[0] = (unsigned char)((val ) & 0xff);
}
static inline unsigned short
load_16_be (unsigned char *p)
{
return (p[1] | (p[0] << 8));
}
static inline unsigned short
load_16_le (unsigned char *p)
{
return (p[0] | (p[1] << 8));
}
static inline unsigned int
load_32_be (unsigned char *p)
{
return (p[3] | (p[2] << 8) | (p[1] << 16) | (p[0] << 24));
}
static inline unsigned int
load_32_le (unsigned char *p)
{
return (p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24));
}
static inline UINT64_TYPE
load_64_be (unsigned char *p)
{
return ((UINT64_TYPE)load_32_be(p) << 32) | load_32_be(p+4);
}
static inline UINT64_TYPE
load_64_le (unsigned char *p)
{
return ((UINT64_TYPE)load_32_le(p+4) << 32) | load_32_le(p);
}
#endif /* K5_PLATFORM_H */
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