The DEC Text Processing Utility (or DECTPU)[1][2] is a dedicated programming language developed by Digital Equipment Corporation (DEC) to easily create multi-functional text editors.
TPU is part of OpenVMS. It can be used on a terminal, a console, or on a graphical system like DECwindows.
Functionality
TPU provides text buffer management APIs in concert with window management APIs which are targeted for the VT100 line of terminals.[citation needed] This allowed split-screen windows with scrolling and hence multiple views of the same buffer content.[citation needed] There are also key mapping APIs provided, allowing a wide range of functionality for editing text. The keyboard mapping could be easily adapted by the admin or the user.[citation needed]
Users could write their own specific editor, to e.g. translate text or short (error) messages to multiple natural languages in a synchronised small text window. The text editor is callable, so you could have small text editors built into specific applications, e.g. a simple mail client. You might redirect output from applications into a text window, using inter-process communication. Therefore one could call web services to return their results into a text buffer.
Implementations
- EVE (Extensible Versatile Editor), the first TPU-based editor, delivered with VAX/VMS by mid-1985.[3]
- In 1986, DEC developed a new version of EDT written in TPU
- Language-Sensitive Editor, part of VAXset (software development platform)
- A version of the vi editor was created by Gregg Wonderly at Oklahoma State University called TPUVI or VITPU.[4] VITPU is still available via the DECUS archives online.[5]
References
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