[PATCH] khash: clarify that allocations never fail

["René Scharfe" <l.s.r@web.de>]

We use our standard allocation functions and macros (xcalloc,
ALLOC_ARRAY, REALLOC_ARRAY) in our version of khash.h.  They terminate
the program on error, so code that's using them doesn't have to handle
allocation failures.  Make this behavior explicit by replacing the code
that handles allocation errors in kh_resize_ and kh_put_ with BUG calls.

Signed-off-by: René Scharfe <l.s.r@web.de>
---
 khash.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/khash.h b/khash.h
index 21c2095216..84ff7230b6 100644
--- a/khash.h
+++ b/khash.h
@@ -126,7 +126,7 @@ static const double __ac_HASH_UPPER = 0.77;
 			if (h->size >= (khint_t)(new_n_buckets * __ac_HASH_UPPER + 0.5)) j = 0;	/* requested size is too small */ \
 			else { /* hash table size to be changed (shrink or expand); rehash */ \
 				ALLOC_ARRAY(new_flags, __ac_fsize(new_n_buckets)); \
-				if (!new_flags) return -1;								\
+				if (!new_flags) BUG("ALLOC_ARRAY failed");				\
 				memset(new_flags, 0xaa, __ac_fsize(new_n_buckets) * sizeof(khint32_t)); \
 				if (h->n_buckets < new_n_buckets) {	/* expand */		\
 					REALLOC_ARRAY(h->keys, new_n_buckets); \
@@ -181,10 +181,10 @@ static const double __ac_HASH_UPPER = 0.77;
 		if (h->n_occupied >= h->upper_bound) { /* update the hash table */ \
 			if (h->n_buckets > (h->size<<1)) {							\
 				if (kh_resize_##name(h, h->n_buckets - 1) < 0) { /* clear "deleted" elements */ \
-					*ret = -1; return h->n_buckets;						\
+					BUG("kh_resize_" #name " failed");					\
 				}														\
 			} else if (kh_resize_##name(h, h->n_buckets + 1) < 0) { /* expand the hash table */ \
-				*ret = -1; return h->n_buckets;							\
+				BUG("kh_resize_" #name " failed");						\
 			}															\
 		} /* TODO: to implement automatically shrinking; resize() already support shrinking */ \
 		{																\
--
2.32.0