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This programming language may be used to instruct a computer to perform a task.
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Execution method: Interpreted
Garbage collected: No
Type strength: Strong
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Listed below are all of the tasks on Rosetta Code which have been solved using Ursa.


Ursa is a simple programming language that I've been working on for awhile now. Its syntax is (at times) similar to Lisp, but instead of being list-based, it is "stream-based." Most in-built statements operate on types of data called streams. Streams are are variable-length arrays of data of a certain type.

The basic premise of ursa is to function as a very high-level abstraction layer between streams and "I/O devices." I/O devices are objects that represent locations that can be read and written using data streams; namely, the console, files, and network ports. Ursa greatly simplifies the implementation of programs that transfer data between these devices.

Ursa uses reverse polish notation for math and functions are simply seperated from their arguments by space characters. This makes implentation of Standard Ursa interpreters since this syntax is easier to write a parser for.

Example Code

Raw File Transfer

This Ursa code opens a port on a remote server, then outputs the specified file to the port. <lang ursa> if (< (size args) 4) out "usage: " args<0> " [server] [port] [file]" endl console stop end if

decl file f decl port p args<3> p.connect args<1> (int args<2>) out (f.readall) p f.close p.close </lang>

Single-User Echo Server

<lang ursa># declare a serverport and a port to attach new connections to declare serverport sp declare port p

  1. declare a string to contain lines of input

declare string input

  1. attach the serverport to port 20000

sp.attach 20000

  1. loop indefinitely, getting connections then echoing the data they send

while true

       set p (sp.getconn)
       out "%msg: connection from " (p.addr) endl console
       out "echo server " _version endl endl p
       while true
               set input (in string p)
               out input endl p
               if (and (= input "") (not (p.isopen 1000)))
               end if
       end while
       out "%msg: connection closed" endl console

end while</lang>

See Also


This category has the following 2 subcategories, out of 2 total.


Pages in category "Ursa"

The following 110 pages are in this category, out of 110 total.