Add nasm_zalloc() to nasmlib.c

Add nasm_zalloc(), a wrapper around calloc(), to allocate
zero-initialized memory.  For large allocations, this is often far
more efficient than allocating and zeroing, since the operating system
tends to keep a pool of zero pages around.

1 files changed, 1 insertions, 3 deletions

diff --git a/hashtbl.c b/hashtbl.c
index 6ebba3e8..cefd37fe 100644
--- a/hashtbl.c
+++ b/hashtbl.c
@@ -15,9 +15,7 @@
 static struct hash_tbl_node *alloc_table(size_t newsize)
 {
     size_t bytes = newsize*sizeof(struct hash_tbl_node);
-    struct hash_tbl_node *newtbl = nasm_malloc(bytes);
-
-    memset(newtbl, 0, bytes);
+    struct hash_tbl_node *newtbl = nasm_zalloc(bytes);
 
     return newtbl;
 }