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mhd_limits.h: improved macros

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This commit is contained in:
Evgeny Grin (Karlson2k)
2017-10-01 21:26:53 +03:00
parent 23c00cd81e
commit 5cbdec21db
1 changed files with 16 additions and 9 deletions
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src/microhttpd/mhd_limits.h
+16 -9
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@@ -32,11 +32,17 @@
#include <limits.h>
#endif /* HAVE_LIMITS_H */
#define MHD_UNSIGNED_TYPE_MAX_(type) ((type)-1)
/* Assume 8 bits per byte, no padding bits. */
#define MHD_SIGNED_TYPE_MAX_(type) \
( (type)((( ((type)1) << (sizeof(type)*8 - 2)) - 1)*2 + 1) )
#define MHD_TYPE_IS_SIGNED_(type) (((type)0)>((type)-1))
#ifndef UINT_MAX
#ifdef __UINT_MAX__
#define UINT_MAX __UINT_MAX__
#else /* ! __UINT_MAX__ */
#define UINT_MAX ((unsigned int) ~((unsigned int)0))
#define UINT_MAX MHD_UNSIGNED_TYPE_MAX_(unsigned int)
#endif /* ! __UINT_MAX__ */
#endif /* !UINT_MAX */
@@ -44,12 +50,12 @@
#ifdef __LONG_MAX__
#define LONG_MAX __LONG_MAX__
#else /* ! __LONG_MAX__ */
#define LONG_MAX ((long) ~(((uint64_t) 1) << (8 * sizeof(long) - 1)))
#define LONG_MAX MHD_SIGNED_TYPE_MAX(long)
#endif /* ! __LONG_MAX__ */
#endif /* !OFF_T_MAX */
#ifndef ULLONG_MAX
#define ULLONG_MAX ((MHD_UNSIGNED_LONG_LONG) ~((MHD_UNSIGNED_LONG_LONG)0))
#define ULLONG_MAX MHD_UNSIGNED_TYPE_MAX_(MHD_UNSIGNED_LONG_LONG)
#endif /* !ULLONG_MAX */
#ifndef INT32_MAX
@@ -80,22 +86,23 @@
#ifdef __SIZE_MAX__
#define SIZE_MAX __SIZE_MAX__
#else /* ! __SIZE_MAX__ */
#define SIZE_MAX ((size_t) ~((size_t)0))
#define SIZE_MAX MHD_UNSIGNED_TYPE_MAX_(size_t)
#endif /* ! __SIZE_MAX__ */
#endif /* !SIZE_MAX */
#ifndef OFF_T_MAX
#define OFF_T_MAX ((off_t) ~(((uint64_t) 1) << (8 * sizeof(off_t) - 1)))
#define OFF_T_MAX MHD_SIGNED_TYPE_MAX_(off_t)
#endif /* !OFF_T_MAX */
#if defined(_LARGEFILE64_SOURCE) && !defined(OFF64_T_MAX)
#define OFF64_T_MAX ((off64_t) ~(((uint64_t) 1) << (8 * sizeof(off64_t) - 1)))
#define OFF64_T_MAX MHD_SIGNED_TYPE_MAX_(uint64_t)
#endif /* _LARGEFILE64_SOURCE && !OFF64_T_MAX */
#ifndef TIME_T_MAX
/* Assume that time_t is signed type. */
/* Even if time_t is unsigned, TIME_T_MAX will be safe limit */
#define TIME_T_MAX ( (time_t) ~(((uint64_t) 1) << (8 * sizeof(time_t) - 1)) )
#define TIME_T_MAX ((time_t) \
( MHD_TYPE_IS_SIGNED_(time_t) ? \
MHD_SIGNED_TYPE_MAX_(time_t) : \
MHD_UNSIGNED_TYPE_MAX_(time_t)))
#endif /* !TIME_T_MAX */
#ifndef TIMEVAL_TV_SEC_MAX