This Space for Rent

New Code!

Discount has been pushed up to version 1.4.1 with the addition of a couple of small new features that were suggested by Mike Schiraldi

  1. “autolinks” – expand unbracketed urls into links (flag MKD_AUTOLINK, -fautolink in the markdown program)
  2. “safe links” – don’t linkify footnotes where the link protocol isn’t a well-known protocol (currently http: https:,ftp:,news:) (flag MKD_SAFELINK, -fsafelink in the markdown program)

The first feature (MKD_AUTOLINK) lets you set discount into a mode where every url it finds will be converted into a hyperlink – if your source discount mentions a url, it will be hyperlinked without having to <> it or wrap it in a [] link.

The second link (MKD_SAFELINK) makes discount do sanity checks on the url provided in a [] link; if the url isn’t a local reference (starting with a /,) or a http://, https://, ftp:// or news://-type url, the [] will not be expanded into a hyperlink but will simply be left as ugly text. This, apparently, helps prevent excitement when someone attempts to embed a script into a [] link (I’ve not encountered that myself, because none of the places I use discount allow users to enter their own [] links.

I’ve also put a couple of small optimizations into the code, but they do not affect output at all as far as I have been able to detect. They might speed things up a little bit (I had a url checking loop that was doing repeated strlen() calls on constants in an array, and I replaced that array with a structure containing the constant and the length of the constant; strlen() might be a fairly cheap function call, but it’s still a lot more expensive than a structure dereference.

I’ve been testing this and playing around with it for a couple of days, so it (heh heh) works for me. Why not try it out? After all, it’s New Code!