=proto
int duk_normalize_index(duk_context *ctx, int index);

=stack
[ ... val! ... ]

=summary
<p>
Normalize argument index relative to the bottom of the current frame.
The resulting index will be 0 or greater and will be independent of
later stack modifications.  If the input index is invalid, returns
<code>DUK_INVALID_INDEX</code>.  If you prefer that an error be thrown for
an invalid index, use
<code><a href="#duk_require_normalize_index">duk_require_normalize_index()</a></code>.
</p>

=example
int idx = duk_normalize_index(-3);

=tags
stack

=seealso
duk_require_normalize_index