Add new forms to lisp

[vinc]

• Add list form
• Add string form
• Rename bytes to encode-string
• Add decode-string form
• Add encode-number and decode-number forms
• Rename read and read-bytes to read-file and read-file-bytes
• Add write-file-bytes and append-file-bytes forms
• Add write-file and append-file simplified forms
• Add read-char form
• Add uptime form
• Add regex-find and regex-match? forms
• Add not form

[vinc]

Got a suggestion to use write-bytes to implement print which is very interesting, we could indeed do (defn print (s) (write-bytes "/dev/console" (bytes s))) but write-bytes try to create a new file so it doesn't work. We'll need to append instead.

[vinc]

This last commit was made possible by #387

[vinc]

> (list 1 2 3)
(1 2 3)

> (string (+ 1 2))
"3"

> (string "the answer is " 42)
"the answer is 42"

> (read-file-bytes "/dev/clk/uptime" 8)
(64 98 79 253 120 231 197 168)

> (decode-number (list 64 98 79 253 120 231 197 168))
146.49969144123065

> (uptime)
146.49969144123065

> (encode-string "foo")
(102 111 111)

> (decode-string (list 102 111 111))
"foo"

> (write-file-bytes "/tmp/hello.txt" (encode-string "Hello, "))
7

> (append-file-bytes "/tmp/hello.txt" (encode-string "World!"))
6

> (read-file "/tmp/hello.txt")
"Hello, World!"

[vinc]

> (write-file "/tmp/hello.txt" "Hello, ")
7

> (append-file "/tmp/hello.txt" "World!")
6

> (read-file "/tmp/hello.txt")
"Hello, World!"

[vinc]

> (not true)
false

> (not false)
true

> (not null)
false

> (not 1)
false

> (not 0)
false

[vinc]

> (regex-match? "foo" "foo bar")
true

> (regex-match? "foo" "bar")
false