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memory-util: introdyce mempcpy_safe()

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This commit is contained in:
Yu Watanabe 2022-02-15 23:50:14 +09:00
parent c9333c236f
commit 507cd76085
1 changed files with 10 additions and 2 deletions
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12
src/basic/memory-util.h
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@ -15,7 +15,7 @@ size_t page_size(void) _pure_;
#define PAGE_ALIGN_DOWN(l) ((l) & ~(page_size() - 1))
#define PAGE_OFFSET(l) ((l) & (page_size() - 1))
/* Normal memcpy requires src to be nonnull. We do nothing if n is 0. */
/* Normal memcpy() requires src to be nonnull. We do nothing if n is 0. */
static inline void *memcpy_safe(void *dst, const void *src, size_t n) {
if (n == 0)
return dst;
@ -23,7 +23,15 @@ static inline void *memcpy_safe(void *dst, const void *src, size_t n) {
return memcpy(dst, src, n);
}
/* Normal memcmp requires s1 and s2 to be nonnull. We do nothing if n is 0. */
/* Normal mempcpy() requires src to be nonnull. We do nothing if n is 0. */
static inline void *mempcpy_safe(void *dst, const void *src, size_t n) {
if (n == 0)
return dst;
assert(src);
return mempcpy(dst, src, n);
}
/* 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)
return 0;