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Diffstat (limited to 'src/include/k5-platform.h')
-rw-r--r-- | src/include/k5-platform.h | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/src/include/k5-platform.h b/src/include/k5-platform.h new file mode 100644 index 0000000..c4cc7bb --- /dev/null +++ b/src/include/k5-platform.h @@ -0,0 +1,170 @@ +/* + * 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 */ |