From 3083284c797fc8fc267144b05c8a58395e4583e3 Mon Sep 17 00:00:00 2001
From: Kimplul <kimi.h.kuparinen@gmail.com>
Date: Sat, 9 Aug 2025 16:06:43 +0300
Subject: add 1d mesh node and refactor 2d mesh node

+ Seems to decrease performance a little bit, presumably due to
  extra register copy, but simplifies code a lot and opens up more
  genericism so I'll consider it an upgrade for now. Copying packets
  around is rather slow though, might in the future move to some
  kind of pointer based packet handling
---
 src/mesh/node.c | 164 --------------------------------------------------------
 1 file changed, 164 deletions(-)
 delete mode 100644 src/mesh/node.c

(limited to 'src/mesh/node.c')

diff --git a/src/mesh/node.c b/src/mesh/node.c
deleted file mode 100644
index 2ac921a..0000000
--- a/src/mesh/node.c
+++ /dev/null
@@ -1,164 +0,0 @@
-#include <gran/mesh/node.h>
-
-struct reg {
-	struct packet pkt;
-	bool busy;
-};
-
-struct node {
-	struct component component;
-	uint16_t x, y;
-
-	uint64_t timestamp;
-
-	struct component *n, *s, *e, *w, *l;
-
-	struct reg n_in, s_in, e_in, w_in, l_in;
-};
-
-enum order {
-	N, S, E, W, L
-};
-
-static inline void maybe_pick(struct reg *output[5], enum order d, struct reg *r)
-{
-	if (output[d] && output[d]->pkt.timestamp < r->pkt.timestamp)
-		return;
-
-	output[d] = r;
-}
-
-static stat node_clock(struct node *node)
-{
-	node->timestamp++;
-
-	struct reg *output[5] = {NULL, NULL, NULL, NULL, NULL};
-	struct reg *input[5] = {
-		&node->n_in,
-		&node->s_in,
-		&node->e_in,
-		&node->w_in,
-		&node->l_in
-	};
-
-	uint8_t X = node->x, Y = node->y;
-	for (size_t i = 0; i < 5; ++i) {
-		struct reg *r = input[i];
-		if (!r->busy)
-			continue;
-
-		uint16_t x, y;
-		addr_mesh(r->pkt.to, &x, &y, NULL);
-		if (x < X) {
-			maybe_pick(output, W, r);
-			continue;
-		}
-
-		if (x > X) {
-			maybe_pick(output, E, r);
-			continue;
-		}
-
-		if (y < Y) {
-			maybe_pick(output, S, r);
-			continue;
-		}
-
-		if (y > Y) {
-			maybe_pick(output, N, r);
-			continue;
-		}
-
-		maybe_pick(output, L, r);
-	}
-
-	struct component *target[7] = {
-		node->n,
-		node->s,
-		node->e,
-		node->w,
-		node->l
-	};
-
-	for (size_t i = 0; i < 5; ++i) {
-		if (!output[i])
-			continue;
-
-		if (!target[i]) {
-			/* for now, should send packet back with an error or something */
-			abort();
-		}
-
-		stat ret = SEND(node, target[i], output[i]->pkt);
-		if (ret == EBUSY)
-			continue;
-
-		assert(ret == OK);
-		output[i]->busy = false;
-	}
-
-	return OK;
-}
-
-static stat reg_receive(struct reg *r, struct packet pkt)
-{
-	if (r->busy)
-		return EBUSY;
-
-	r->pkt = pkt;
-	r->busy = true;
-	return OK;
-}
-
-static stat node_receive(struct node *node, struct component *from, struct packet pkt)
-{
-	if (from == node->l) {
-		/* add time when packet entered network */
-		pkt.timestamp = node->timestamp;
-		return reg_receive(&node->l_in, pkt);
-	}
-
-	if (from == node->n)
-		return reg_receive(&node->n_in, pkt);
-
-	if (from == node->s)
-		return reg_receive(&node->s_in, pkt);
-
-	if (from == node->e)
-		return reg_receive(&node->e_in, pkt);
-
-	if (from == node->w)
-		return reg_receive(&node->w_in, pkt);
-
-	abort();
-	return OK;
-}
-
-struct component *create_mesh_node(uint16_t x, uint16_t y)
-{
-	struct node *node = calloc(1, sizeof(struct node));
-	if (!node)
-		return NULL;
-
-	node->component.receive = (receive_callback)node_receive;
-	node->component.clock = (clock_callback)node_clock;
-	node->x = x;
-	node->y = y;
-	return (struct component *)node;
-}
-
-stat mesh_node_connect(struct component *node,
-		struct component *n,
-		struct component *s,
-		struct component *e,
-		struct component *w,
-		struct component *l)
-{
-	struct node *nod = (struct node *)node;
-	nod->n = n;
-	nod->s = s;
-	nod->e = e;
-	nod->w = w;
-	nod->l = l;
-	return OK;
-}
-- 
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