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vkd3d: Introduce a vkd3d_bound_range() helper.

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Signed-off-by: Zebediah Figura <zfigura@codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Zebediah Figura
2021-07-26 15:51:28 -05:00
committed by Alexandre Julliard
parent 9f0b475583
commit bcf272aa0b
4 changed files with 15 additions and 4 deletions
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11
include/private/vkd3d_common.h
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@@ -134,6 +134,17 @@ static inline void *vkd3d_memmem( const void *haystack, size_t haystack_len, con
return NULL;
}
static inline bool vkd3d_bound_range(size_t start, size_t count, size_t limit)
{
#ifdef HAVE_BUILTIN_ADD_OVERFLOW
size_t sum;
return !__builtin_add_overflow(start, count, &sum) && sum <= limit;
#else
return start <= limit && count <= limit - start;
#endif
}
static inline int ascii_isupper(int c)
{
return 'A' <= c && c <= 'Z';