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memory-util: make mempcpy_typesafe nestable

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Mike Yuan
2025-03-20 17:31:54 +01:00
parent 0ffd176bf7
commit b062cf19f4
1 changed files with 7 additions and 4 deletions
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src/basic/memory-util.h
+7 -4
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@@ -35,13 +35,16 @@ static inline void* mempcpy_safe(void *dst, const void *src, size_t n) {
return mempcpy(dst, src, n);
}
#define mempcpy_typesafe(dst, src, n) \
#define _mempcpy_typesafe(dst, src, n, sz) \
({ \
size_t _sz_; \
assert_se(MUL_SAFE(&_sz_, sizeof((dst)[0]), n)); \
(typeof((dst)[0])*) mempcpy_safe(dst, src, _sz_); \
size_t sz; \
assert_se(MUL_SAFE(&sz, sizeof((dst)[0]), n)); \
(typeof((dst)[0])*) mempcpy_safe(dst, src, sz); \
})
#define mempcpy_typesafe(dst, src, n) \
_mempcpy_typesafe(dst, src, n, UNIQ_T(sz, UNIQ))
/* Normal memcmp() requires s1 and s2 to be nonnull. We do nothing if n is 0. */
static inline int memcmp_safe(const void *s1, const void *s2, size_t n) {
if (n == 0)