From 82475e2d3c98c482dba8cffec6686f0681f8ebd8 Mon Sep 17 00:00:00 2001
From: David Phillips <david@sighup.nz>
Date: Mon, 6 Aug 2018 01:09:10 +1200
Subject: Strip out old gates code

---
 gate.c | 146 +++--------------------------------------------------------------
 gate.h |  20 ---------
 2 files changed, 6 insertions(+), 160 deletions(-)

diff --git a/gate.c b/gate.c
index c44cade..8ddb8bd 100644
--- a/gate.c
+++ b/gate.c
@@ -4,109 +4,19 @@
 #include "gate.h"
 #include "error.h"
 
-#define GATE_MAX   1024
-#define INPUT_MAX  1024
-#define OUTPUT_MAX 1024
-
-static size_t gate_count;
-static size_t input_count;
-static struct gate gates[GATE_MAX];
-static struct gate inputs[INPUT_MAX];
-
-int
-count_guard(int c, int max, char *desc) {
-	if (c >= max) {
-		emit_error("Internal: too many %s\n", desc);
-		return 1;
-	}
-	return 0;
-}
-
-int
-gate_add_generic(struct gate *array, size_t array_index, char *name, enum BINARY (*operation)(enum BINARY, enum BINARY), struct gate *in1, struct gate *in2) {
-	struct gate g;
-
-	if (name == NULL) {
-		g.name = NULL;
-	} else {
-		g.name = strdup(name);
-		if (g.name == NULL) {
-			emit_error("strdup failed");
-			return 1;
-		}
-	}
-	g.operation = operation;
-	g.in1 = in1;
-	g.in2 = in2;
-
-	array[array_index] = g;
-
-	return 0;
-}
-
 int
 gate_add(enum TOKEN_TYPE op, char *name, char *left, char *right) {
 	/* FIXME */
+	(void) op;
 	fprintf(stderr, "bop on %s and %s for gate %s not implemented\n", left, right, name);
 	return 1;
 }
 
-struct gate*
-gate_get_input_by_name(char *name) {
-	struct gate *res = NULL;
-	size_t i = 0;
-
-	for (i = 0; i < input_count; i++) {
-		if (inputs[i].name == NULL) {
-			emit_error("input at index %zd has NULL name, ignoring", i);
-			continue;
-		}
-		if (strcmp(inputs[i].name, name) == 0) {
-			res = &inputs[i];
-			break;
-		}
-	}
-
-	return res;
-}
-
 int
 gate_input_add(char *name) {
-	int res = 0;
-	if (count_guard(input_count, INPUT_MAX, "inputs")) {
-		return 1;
-	}
-
-	if (gate_get_input_by_name(name) != NULL) {
-		emit_error("Already an input called \"%s\"!\n", name);
-		return 1;
-	}
-
-	res = gate_add_generic(inputs, input_count, name, logic_and, NULL, NULL);
-	input_count++;
-	return res;
-}
-
-/*int
-gate_add(char *name, enum BINARY (*operation)(enum BINARY, enum BINARY), struct gate *in1, struct gate *in2) {
-	if (count_guard(gate_count, GATE_MAX, "gates")) {
-		return 1;
-	}
-
-	gate_add_generic(gates, gate_count, name, operation, in1, in2);
-	gate_count++;
-
-	return 0;
-}*/
-
-void
-gate_free_all() {
-	size_t i = 0;
-	for (i = 0; i < gate_count; i++) {
-		if (gates[i].name != NULL) {
-			free(gates[i].name);
-		}
-	}
+	/* FIXME */
+	(void)name;
+	return 1;
 }
 
 int
@@ -116,52 +26,8 @@ tick(void) {
 }
 
 void
-gate_init(void) {
-	gate_count = 0;
-	input_count = 0;
-	memset(gates, 0, sizeof(gates));
-	memset(inputs, 0, sizeof(inputs));
-}
-
-void
 gate_dump(void) {
-	size_t i = 0;
-
-	emit_info("Gates:\n");
-	for (i = 0; i < gate_count; i++) {
-		emit_info("gate '%s': %s\n", gates[i].name, gates[i].output == LOGIC_HIGH ? "HIGH" : "LOW");
-	}
-}
-
-int
-gate_set_input(char *name, enum BINARY value) {
-	struct gate *g = NULL;
-	
-	if (NULL == (g = gate_get_input_by_name(name))) {
-		emit_error("No such input %s", name);
-		return 1;
-	}
-
-	g->output = value;
-
-	return 0;
-}
-
-void gate_update(void) {
-	size_t i = 0;
-	struct gate *g = NULL;
-	enum BINARY in1 = LOGIC_LOW;
-	enum BINARY in2 = LOGIC_LOW;
-
-	/* FIXME should be input->output flow path */
-	/* FIXME data flow doesn't matter yet because gate chaining isn't allowed */
-
-	for (i = 0; i < gate_count; i++) {
-		g = &gates[i];
-		emit_error("Name: '%s'\n", g->name);
-		in1 = g->in1->output;
-		in2 = g->in2->output;
-		g->output = (g->operation)(in1, in2);
-	}
+	/* FIXME */
+	emit_error("FIXME\n");
 }
 
diff --git a/gate.h b/gate.h
index 535e3b2..8b26970 100644
--- a/gate.h
+++ b/gate.h
@@ -4,30 +4,10 @@
 #include <stddef.h>
 
 #include "token.h"
-#include "logic.h"
 
-enum NODE_TYPE {
-	NODE_INPUT,
-	NODE_OUTPUT
-};
-
-struct gate {
-	char *name;
-	enum BINARY (*operation)(enum BINARY, enum BINARY);
-	enum BINARY output;
-	struct gate *in1;
-	struct gate *in2;
-};
-
-void gate_update_output(struct gate *);
 int gate_input_add(char *name);
-struct gate* gate_get_input_by_name(char *name);
 int gate_add(enum TOKEN_TYPE op, char *name, char *left, char* right);
-//int gate_add(char *name, enum BINARY (*operation)(enum BINARY, enum BINARY), struct gate *in1, struct gate *in2);
 int tick(void);
-void gate_init(void);
 void gate_dump(void);
-int gate_set_input(char *name, enum BINARY value);
-void gate_update(void);
 
 #endif
-- 
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