commit ae00b3a76f3c24092e79eced42b1dfc7cf36acac
parent 619be354c8e38b53d36930dc6f7f1242cd2d853f
Author: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Wed, 18 Apr 2007 16:24:12 -0300
another way to normalize -0 that avoids problems with very small
numbers (adding 1 turns them all into 1)
Diffstat:
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/ltable.c b/ltable.c
@@ -1,5 +1,5 @@
/*
-** $Id: ltable.c,v 2.35 2006/09/11 14:07:24 roberto Exp roberto $
+** $Id: ltable.c,v 2.36 2007/04/10 12:18:17 roberto Exp roberto $
** Lua tables (hash)
** See Copyright Notice in lua.h
*/
@@ -84,8 +84,8 @@ static const Node dummynode_ = {
static Node *hashnum (const Table *t, lua_Number n) {
unsigned int a[numints];
int i;
- n += 1; /* normalize number (avoid -0) */
- lua_assert(sizeof(a) <= sizeof(n));
+ if (luai_numeq(n, 0)) /* avoid problems with -0 */
+ return gnode(t, 0);
memcpy(a, &n, sizeof(a));
for (i = 1; i < numints; i++) a[0] += a[i];
return hashmod(t, a[0]);