system/systemd
system/systemd
1
0
Fork 0
mirror of https://github.com/systemd/systemd synced 2024-10-15 12:34:37 +00:00
Code Issues Packages Projects Releases Wiki Activity

util: add realloc_multiply() helper

Browse source 
This is similar to malloc_multiply() and friends. It is realloc() with a
multiplication-overflow check.
This commit is contained in:
David Herrmann 2014-06-13 18:43:22 +02:00
parent 368504f485
commit 9489490a69
1 changed files with 7 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
src/shared/util.h
View file

@ -672,6 +672,13 @@ _malloc_ _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b)
return malloc(a * b);
}
_alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) {
if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
return NULL;
return realloc(p, a * b);
}
_alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
return NULL;