cl-gap-buffer

#+TITLE: The =CL-GAP-BUFFER= Library
#+AUTHOR: Robert Smith
#+EMAIL: quad@symbo1ics.com

* Summary

A small library for efficient-local-insertion strings represented as
gap buffers. It operates efficiently for cursor-based editing.


* Usage

The principle use follows. Mutable operations' output is elided.

Create a gap buffer.

    : > (defparameter buf (make-gap-buffer))

Add some data to it.

    : > (gap-buffer-insert-string buf "hello")
    : > (gap-buffer-string buf)
    : "hello"
    : > (gap-buffer-insert-char buf #\a)
    : > (gap-buffer-string buf)
    : "helloa"

Move about in the gap buffer.

    : > (gap-buffer-move-left buf)
    : > (gap-buffer-move-left buf)
    : > (gap-buffer-insert-char buf #\y)
    : > (gap-buffer-string buf)
    : "hellyoa"

Remove characters.

    : > (gap-buffer-move-right buf)
    : > (gap-buffer-backspace buf)
    : > (gap-buffer-string buf)
    : "hellya"
    : > (gap-buffer-insert-char buf #\e)
    : > (gap-buffer-string buf)
    : "hellyea"
    : > (gap-buffer-delete buf)
    : > (gap-buffer-string buf)
    : "hellye"
    : > (gap-buffer-insert-char buf #\s)
    : > (gap-buffer-string buf)
    : "hellyes"


* Dependencies

None.


* License

See the file ~LICENSE~.

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An implementation of gap buffers in Common Lisp.

cl-gap-buffer

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