ewah: convert to REALLOC_ARRAY, etc

Now that we're built around xmalloc and friends, we can use
helpers like REALLOC_ARRAY, ALLOC_GROW, and so on to make
the code shorter and protect against integer overflow.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/ewah/ewah_bitmap.c b/ewah/ewah_bitmap.c
index fcd465e9c2..2dc9c82ecf 100644
--- a/ewah/ewah_bitmap.c
+++ b/ewah/ewah_bitmap.c
@@ -39,8 +39,7 @@ static inline void buffer_grow(struct ewah_bitmap *self, size_t new_size)
 		return;
 
 	self->alloc_size = new_size;
-	self->buffer = xrealloc(self->buffer,
-		self->alloc_size * sizeof(eword_t));
+	REALLOC_ARRAY(self->buffer, self->alloc_size);
 	self->rlw = self->buffer + (rlw_offset / sizeof(eword_t));
 }
 
@@ -283,8 +282,8 @@ struct ewah_bitmap *ewah_new(void)
 	struct ewah_bitmap *self;
 
 	self = xmalloc(sizeof(struct ewah_bitmap));
-	self->buffer = xmalloc(32 * sizeof(eword_t));
 	self->alloc_size = 32;
+	ALLOC_ARRAY(self->buffer, self->alloc_size);
 
 	ewah_clear(self);
 	return self;