Does gforth contain network socket capability?

Question

Often, when learning a language I'll write a server of some sort. Does gforth have the capability to use network sockets?

I don't see anything about sockets in the manual.

Answer 1

Though I don't see any documentation about it, there is a socket.fs which binds to libc.

• You can find some examples of FORTH that use sockets.fs on Rosetta Code, specifically the ECHO server example

Provided under the GNU FDL, from Rossetta code by IanOsgood (commit)

include unix/socket.fs

128 constant size

: (echo) ( sock buf -- sock buf )
  begin
    cr ." waiting..."
    2dup 2dup size read-socket nip
    dup 0>
  while
    ."  got: " 2dup type
    rot write-socket
  repeat
  drop drop drop ;

create buf size allot

: echo-server ( port -- )
  cr ." Listening on " dup .
  create-server
  dup 4 listen
  begin
    dup accept-socket
    cr ." Connection!"
    buf ['] (echo) catch
    cr ." Disconnected (" . ." )"
    drop close-socket
  again ;

12321 echo-server

However, ymmv

nc localhost 12321
PING
PING
PONG
PONG

There are no Keepalives so you'll logically get disconnects from that.