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fix(common): use stdbit.h for C23

This commit is contained in:
thetek 2023-04-25 12:44:31 +02:00
parent 2cc4fcc83b
commit 96d05f7e61
1 changed files with 10 additions and 5 deletions
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15
lib/inc/common.h
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@ -7,12 +7,17 @@
#define max(a, b) ((a) > (b) ? (a) : (b)) /* find the maximum of two numbers */
#define min(a, b) ((a) < (b) ? (a) : (b)) /* find the minimum of two numbers */
#if UINTPTR_MAX == 0xffffffffffffffff
# define next_pow_of_two(n) (((size_t) 1) << (64 - __builtin_clzll (n))) /* round up a size_t number to the next power of two (64-bit) */
#elif UINTPTR_MAX == 0xffffffff
# define next_pow_of_two(n) (((size_t) 1) << (64 - __builtin_clz (n))) /* round up a size_t number to the next power of two (32-bit) */
#if __STDC_VERSION__ >= 202000L // C23 or above
# include <stdbit.h>
# define next_pow_of_two(n) (((size_t) 1) << (64 - stdc_leading_zeros (n))) /* round up a size_t number to the next power of two (64-bit) */
#else
# error unsupported architecture: size_t expected to be 64-bit or 32-bit.
# if UINTPTR_MAX == 0xffffffffffffffff
# define next_pow_of_two(n) (((size_t) 1) << (64 - __builtin_clzll (n))) /* round up a size_t number to the next power of two (64-bit) */
# elif UINTPTR_MAX == 0xffffffff
# define next_pow_of_two(n) (((size_t) 1) << (64 - __builtin_clz (n))) /* round up a size_t number to the next power of two (32-bit) */
# else
# error unsupported architecture: size_t expected to be 64-bit or 32-bit.
# endif
#endif
void *smalloc (size_t size); /* safe malloc */