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Make ensure_capacity a bit more pedantically correct

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Issues noted by cypherpunks on #18162
This commit is contained in:
Nick Mathewson 2016-02-11 12:54:52 -05:00
parent bca7083e82
commit c2fd648469
1 changed files with 6 additions and 1 deletions
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7
src/common/container.c
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@ -58,11 +58,16 @@ smartlist_clear(smartlist_t *sl)
sl->num_used = 0;
}
#if SIZE_MAX < INT_MAX
#error "We don't support systems where size_t is smaller than int."
#endif
/** Make sure that <b>sl</b> can hold at least <b>size</b> entries. */
static INLINE void
smartlist_ensure_capacity(smartlist_t *sl, size_t size)
{
#if SIZEOF_SIZE_T > SIZEOF_INT
/* Set MAX_CAPACITY to MIN(INT_MAX, SIZE_MAX / sizeof(void*)) */
#if (SIZE_MAX/SIZEOF_VOID_P) > INT_MAX
#define MAX_CAPACITY (INT_MAX)
#else
#define MAX_CAPACITY (int)((SIZE_MAX / (sizeof(void*))))