do not convert decimal constants with overflow to integers.
(Therefore, they will be converted as floats)
diff --git a/lobject.c b/lobject.c
index 41a50df..6c72144 100644
--- a/lobject.c
+++ b/lobject.c
@@ -1,5 +1,5 @@
/*
-** $Id: lobject.c,v 2.109 2015/12/14 11:53:27 roberto Exp roberto $
+** $Id: lobject.c,v 2.110 2016/05/02 14:00:32 roberto Exp roberto $
** Some generic functions over Lua objects
** See Copyright Notice in lua.h
*/
@@ -293,6 +293,9 @@
}
+#define MAXBY10 cast(lua_Unsigned, LUA_MAXINTEGER / 10)
+#define MAXLASTD cast_int(LUA_MAXINTEGER % 10)
+
static const char *l_str2int (const char *s, lua_Integer *result) {
lua_Unsigned a = 0;
int empty = 1;
@@ -309,7 +312,10 @@
}
else { /* decimal */
for (; lisdigit(cast_uchar(*s)); s++) {
- a = a * 10 + *s - '0';
+ int d = *s - '0';
+ if (a >= MAXBY10 && (a > MAXBY10 || d > MAXLASTD + neg)) /* overflow? */
+ return NULL; /* do not accept it (as integer) */
+ a = a * 10 + d;
empty = 0;
}
}
