Re: [PATCH v14 01/11] trailer: add data structures and basic functions

Christian Couder <chriscool@tuxfamily.org> writes:

> +/* Get the length of buf from its beginning until its last alphanumeric character */

That makes it sound as if feeding "abc%de#f@" to the function returns 3 for "abc", but

Show 6 quoted lines

> +static size_t alnum_len(const char *buf, size_t len)
> +{
> +	while (len > 0 && !isalnum(buf[len - 1]))
> +		len--;
> +	return len;
> +}

doesn't it look at '@', be unhappy and decrement, look at 'f' and break out to return the length of "abc%de#f"?

Perhaps that behaviour _is_ what you want, but then the comment is lying, no?