I review some recent commits covering user authentication and telnet negotiation, then write some ANSI output code and a broken function for returning a number's ordinal suffix.
I'm starting on a new project and I needed a cooperative threading mechanism which didn't exist in System 6, so I created one.
It's been almost a year since my last
confessional video.
A few weeks ago I started working on a small revision control system to handle
my C projects developed on my Mac and it's now at the point where I can at least
manage commits to the tool itself.
I've created an adapter for the Cidco MailStation Z80 computer which adds the ability to use WiFi for data transfer, code uploading, and to act as a WiFi modem for my msTERM terminal emulator.
On the modern web, everything must be encrypted. Unencrypted websites are treated as relics of the past with browsers declaring them toxic waste not to be touched (or even looked at) and search engines de-prioritizing their content.
While this push for security is good for protecting modern communication, there is a whole web full of information and services that don't need to be secured and those trying to access them from older vintage computers or even through modern embedded devices are increasingly being left behind.
Returning to the development of my IMAP client, I add SOCKS5 support to be able to connect through a network proxy, particularly the one I made that is able to convert TLS-encrypted data from my real mailserver into plaintext that the Mac's slow CPU can support.
In the
previous episode
I quickly ported OpenBSD's diff(1) but there wasn't any interface to select
files or scroll through the output.
I've since added a proper GUI with the ability to select files or folders, and
in this episode I walk through the GUI and filesystem code and then add a
proper Edit menu.
I also make a formal release of the code and binary available for download.
I've wanted a simple revision control system on my Mac since starting
development of my IMAP client.
Porting a large system like Git or even CVS would be overkill (and very slow),
but maybe something small like OpenBSD's
RCS
implementation would suffice.
For now, just having a diff utility would be helpful so in this video I port
the guts of
OpenBSD's diff(1)
and show it generating a unified diff between revisions of a C file.
In this episode, I fetch the flags of each message and for unseen messages, make them appear in the list in bold. That introduces an off-by-one which I run out of time to fix while recording.
Today, I implement plaintext message viewing and hook it up to the message list.
I also review a cleanup of int variables to make them either short or long
throughout the project.
I wrote a utility function to parse RFC822 dates/times sent by the IMAP server, which then converts them to a UTC time. In this video, I hook it into the IMAP parser and add a resource string for the local timezone offset setting, so these UTC times can then be converted to a local time and displayed in the message list.
I recently read about using a jump instruction as an LDEF resource to allow
keeping the list definition function in the main program executable/project, so
in this video I implement the technique for the message list.
In this video, I get the list of messages displaying again and fix a bug that
occurred when closing a mailbox.
I provide a quick summary of creating LDEF procedures in THINK C for drawing
custom list cells, which I will expand upon on in a future video.
In this episode, I fix the off-by-one error in the IMAP envelope parser noted
in the previous episode, then improve the tracking of a malloced buffer that
gets shifted around during parsing.
Returning to the development of my IMAP client, in this video I add
functionality to fetch the default mailbox name from the resource file (later to
be moved to a preferences window) and then eventually locate a crash in the IMAP
protocol parser from a bogus memmove.
