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Misc updates to limits.h to improve resiliency

This commit is contained in:
mintsuki 2023-04-25 01:47:10 +02:00
parent bbd441b204
commit 2d17f30307
1 changed files with 43 additions and 14 deletions
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57
limits.h
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@ -6,47 +6,76 @@
#ifndef __FSTD_HDRS_LIMITS_H_MACROS
#define __FSTD_HDRS_LIMITS_H_MACROS 1
#ifndef __FSTD_HDRS_C_JOIN
# define __FSTD_HDRS_C_EXPAND_JOIN(x, suffix) x ## suffix
# define __FSTD_HDRS_C_JOIN(x, suffix) __FSTD_HDRS_C_EXPAND_JOIN(x, suffix)
#endif
#undef CHAR_BIT
#define CHAR_BIT __CHAR_BIT__
#define MB_LEN_MAX 16
#ifndef MB_LEN_MAX
# define MB_LEN_MAX 1
#endif
#undef SCHAR_MAX
#define SCHAR_MAX __SCHAR_MAX__
#undef SCHAR_MIN
#define SCHAR_MIN (-SCHAR_MAX - 1)
#define UCHAR_MAX (__FSTD_HDRS_C_JOIN(SCHAR_MAX, U) * 2 + 1)
#undef UCHAR_MAX
#if __SCHAR_MAX__ == __INT_MAX__
# define UCHAR_MAX (SCHAR_MAX * 2U + 1U)
#else
# define UCHAR_MAX (SCHAR_MAX * 2 + 1)
#endif
#ifdef __CHAR_UNSIGNED__
# undef CHAR_MAX
# define CHAR_MAX UCHAR_MAX
# define CHAR_MIN 0
# undef CHAR_MIN
# if __SCHAR_MAX__ == __INT_MAX__
# define CHAR_MIN 0U
# else
# define CHAR_MIN 0
# endif
#else
# undef CHAR_MAX
# define CHAR_MAX SCHAR_MAX
# undef CHAR_MIN
# define CHAR_MIN SCHAR_MIN
#endif
#undef SHRT_MAX
#define SHRT_MAX __SHRT_MAX__
#undef SHRT_MIN
#define SHRT_MIN (-SHRT_MAX - 1)
#define USHRT_MAX (__FSTD_HDRS_C_JOIN(SHRT_MAX, U) * 2 + 1)
#undef USHRT_MAX
#if __SHRT_MAX_ == __INT_MAX__
# define USHRT_MAX (SHRT_MAX * 2U + 1U)
#else
# define USHRT_MAX (SHRT_MAX * 2 + 1)
#endif
#undef INT_MAX
#define INT_MAX __INT_MAX__
#undef INT_MIN
#define INT_MIN (-INT_MAX - 1)
#define UINT_MAX (__FSTD_HDRS_C_JOIN(INT_MAX, U) * 2 + 1)
#undef UINT_MAX
#define UINT_MAX (INT_MAX * 2U + 1U)
#undef LONG_MAX
#define LONG_MAX __LONG_MAX__
#define LONG_MIN (-LONG_MAX - 1)
#undef LONG_MIN
#define LONG_MIN (-LONG_MAX - 1L)
#define ULONG_MAX (__FSTD_HDRS_C_JOIN(LONG_MAX, U) * 2 + 1)
#undef ULONG_MAX
#define ULONG_MAX (LONG_MAX * 2UL + 1UL)
#undef LLONG_MAX
#define LLONG_MAX __LONG_LONG_MAX__
#define LLONG_MIN (-LLONG_MAX - 1)
#undef LLONG_MIN
#define LLONG_MIN (-LLONG_MAX - 1LL)
#define ULLONG_MAX (__FSTD_HDRS_C_JOIN(LLONG_MAX, U) * 2 + 1)
#undef ULLONG_MAX
#define ULLONG_MAX (LLONG_MAX * 2ULL + 1ULL)
#endif