ludic/examples/networking/net_echo.ludic
Orkuncakilkaya bf36bc8a8f refactor(runtime,packages,examples): named constants, package enums, idiom sweep
- runtime: HEADLESS_FRAME_PATH, STICK_DEADZONE / STICK_LEFT_X/Y, key and
  byte codes as char literals throughout (`k == 'w'`, `fill(rt_map, ' ', …)`)
- ludic.gameplay/stats: drop the duplicate `stat_field` (it answered "atk"
  for every build stat); Stats.base uses stats_field_name
- ludic.shooter: compare aim modes and fire patterns with AimMode.* and
  WeaponPattern.* instead of raw ints; STICK_RIGHT_X/Y
- ludic.npcai: DecisionMade / brain_set_state use AiState.*
- examples/games/menu.ludic uses Font.load / Ui.* with FONT_PATH and
  BACKDROP named; strings.ludic header says what it prints
- whole tree: `x = x + 1` → `x += 1` (single-term right-hand sides only),
  `0 - x` → `-x`, ASCII codes → char literals; every .ludic and every
  ```ludic fence reformatted with the fixed formatter (whitespace only)

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
2026-09-05 01:12:26 +03:00

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# net_echo.ludic — N0: the transport seam (NETWORKING-DESIGN §5, §13 N0).
#
# The transport is two calls — net_send puts a datagram on the wire, net_poll
# takes the next one off. A production build binds them to a real socket with
# `extern fn net_send/net_poll` (UDP native, WebRTC/WebSocket wasm); absent that,
# the compiler supplies a built-in in-process loopback, so a program is networked
# end to end with NO foreign host — pure Ludic. This sends four bytes and polls
# them back through the loopback: prints 4, then 10 20 30 42.
program NetEcho {
entry {
let out = bytes(4)
out[0] = '\n'
out[1] = 20
out[2] = 30
out[3] = '*'
net_send(0, out, 4) # onto the wire (the built-in loopback)
let inb = bytes(64)
let n = net_poll(inb, 64) # take the next datagram back off
print(n) # 4
var i = 0
while i < n { print(inb[i]); i += 1 } # 10 20 30 42
}
}