Function reftable_alloc_grow

reftable/basics.h:218–234

	} while (0)

static inline void *reftable_alloc_grow(void *p, size_t nelem, size_t elsize,
					size_t *allocp)
{
	void *new_p;
	size_t alloc = *allocp * 2 + 1, alloc_bytes;
	if (alloc < nelem)
		alloc = nelem;
	if (reftable_alloc_size(elsize, alloc, &alloc_bytes) < 0) {
		errno = ENOMEM;
		return p;
	}
	new_p = reftable_realloc(p, alloc_bytes);
	if (!new_p)
		return p;
	*allocp = alloc;
	return new_p;
}

#define REFTABLE_ALLOC_GROW(x, nr, alloc) ( \
	(nr) > (alloc) && ( \