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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:
Mltable.c | 6+++---
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]);