jscript: Do not call memcpy() with a NULL pointer argument

[James Hawkins]

On Thu, Dec 18, 2008 at 2:21 PM, Andrew Talbot
<andrew.talbot at talbotville.com> wrote:
> Changelog:
>    jscript: Do not call memcpy() with NULL pointer argument.
>
> diff --git a/dlls/jscript/string.c b/dlls/jscript/string.c
> index eeceb1f..b49d3b3 100644
> --- a/dlls/jscript/string.c
> +++ b/dlls/jscript/string.c
> @@ -1395,8 +1395,12 @@ HRESULT create_string(script_ctx_t *ctx, const WCHAR *str, DWORD len, DispatchEx
>         return E_OUTOFMEMORY;
>     }
>
> -    memcpy(string->str, str, len*sizeof(WCHAR));
> -    string->str[len] = 0;
> +    if (str) {
> +        memcpy(string->str, str, len*sizeof(WCHAR));
> +        string->str[len] = 0;
> +    }else {
> +        string->str[0] = 0;
> +    }
>
>     *ret = &string->dispex;
>     return S_OK;
>

I didn't write jscript, so I'm not the expert, but create_string is
internal, so we should probably crash if str is NULL instead of hiding
the error.  What is this patch for?

-- 
James Hawkins