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avoid possibility of subtle arith. overflow

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This commit is contained in:
Roberto Ierusalimschy 2015-07-04 13:32:34 -03:00
parent 8217e0d4fe
commit 8950e0c049
1 changed files with 2 additions and 2 deletions
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4
ltable.c
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@ -1,5 +1,5 @@
/* /*
** $Id: ltable.c,v 2.111 2015/06/09 14:21:13 roberto Exp roberto $ ** $Id: ltable.c,v 2.112 2015/07/01 17:46:55 roberto Exp roberto $
** Lua tables (hash) ** Lua tables (hash)
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -501,7 +501,7 @@ TValue *luaH_newkey (lua_State *L, Table *t, const TValue *key) {
*/ */
const TValue *luaH_getint (Table *t, lua_Integer key) { const TValue *luaH_getint (Table *t, lua_Integer key) {
/* (1 <= key && key <= t->sizearray) */ /* (1 <= key && key <= t->sizearray) */
if (l_castS2U(key - 1) < t->sizearray) if (l_castS2U(key) - 1 < t->sizearray)
return &t->array[key - 1]; return &t->array[key - 1];
else { else {
Node *n = hashint(t, key); Node *n = hashint(t, key);