From 15ff00e056a98ab4210dde3d4461a88849d6c1d4 Mon Sep 17 00:00:00 2001
From: David Vazgenovich Shakaryan <dvshakaryan@gmail.com>
Date: Mon, 23 May 2022 15:23:48 -0700
Subject: move a bunch of general match logic from web to lib

---
 match.c | 106 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 98 insertions(+), 8 deletions(-)

(limited to 'match.c')

diff --git a/match.c b/match.c
index 1e131f0..03e91fd 100644
--- a/match.c
+++ b/match.c
@@ -1,12 +1,13 @@
 #include "match.h"
 
+#include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
 
-struct leg *leg_init(int points, char *name)
+struct leg *leg_init(int points)
 {
 	struct leg *l = calloc(1, sizeof(*l));
-	l->name = strdup(name);
+
 	l->start = l->rem = points;
 	l->size_visits = 16;
 	l->visits = calloc(l->size_visits, sizeof(*(l->visits)));
@@ -16,26 +17,115 @@ struct leg *leg_init(int points, char *name)
 
 void leg_free(struct leg *l)
 {
+	// readd undone visits before free to avoid memory leak
+	l->n_visits += l->undone_visits;
+
 	for (int i = 0; i < l->n_visits; ++i) {
-		if (l->visits[i].darts)
-			free(l->visits[i].darts);
-		if (l->visits[i].ccoords)
-			free(l->visits[i].ccoords);
+		free(l->visits[i].darts);
+		free(l->visits[i].ccoords);
 	}
 	free(l->visits);
-	free(l->name);
 	free(l);
 }
 
 void leg_grow_visits(struct leg *l)
 {
-
 	size_t bytes = l->size_visits * sizeof(*(l->visits));
 	l->size_visits *= 2;
 	l->visits = realloc(l->visits, 2 * bytes);
 	memset((char *)l->visits + bytes, 0, bytes);
 }
 
+void leg_undo_visit(struct leg *l)
+{
+	l->rem += l->visits[--l->n_visits].points;
+	++l->undone_visits;
+}
+
+void leg_redo_visit(struct leg *l)
+{
+	l->rem = l->visits[l->n_visits++].rem;
+	--l->undone_visits;
+}
+
+struct match *match_init()
+{
+	struct match *m = calloc(1, sizeof(*m));
+
+	m->size_players = 2;
+	m->players = malloc(m->size_players * sizeof(*m->players));
+	m->legs = malloc(m->size_players * sizeof(*m->legs));
+
+	return m;
+}
+
+void match_free(struct match *m)
+{
+	for (int i = 0; i < m->n_players; ++i) {
+		free(m->players[i].name);
+		leg_free(m->legs[i]);
+	}
+
+	free(m->players);
+	free(m->legs);
+	free(m);
+}
+
+static void match_grow_players(struct match *m)
+{
+	m->size_players *= 2;
+	m->players = realloc(m->players,
+		m->size_players * sizeof(*m->players));
+	m->legs = realloc(m->legs,
+		m->size_players * sizeof(*m->legs));
+}
+
+void match_add_player(struct match *m, enum player_type type, char *name,
+	int start_pts)
+{
+	if (m->n_players == m->size_players)
+		match_grow_players(m);
+	int i = m->n_players++;
+
+	struct player *p = m->players + i;
+	p->type = type;
+	p->name = strdup(name);
+
+	m->legs[i] = leg_init(start_pts);
+}
+
+int match_next_player(struct match *m)
+{
+	if (m->active_player == m->n_players)
+		return 1;
+	else
+		return m->active_player + 1;
+}
+
+int match_prev_player(struct match *m)
+{
+	if (m->active_player == 1)
+		return m->n_players;
+	else
+		return m->active_player - 1;
+}
+
+int match_last_player_to_throw(struct match *m)
+{
+	int p = match_winning_player(m);
+	return p ? p : match_prev_player(m);
+}
+
+int match_winning_player(struct match *m)
+{
+	for (int i = 0; i < m->n_players; ++i) {
+		if (m->legs[i]->rem == 0)
+			return i + 1;
+	}
+
+	return 0;
+}
+
 bool is_points_valid(int pts, int rem)
 {
 	return pts <= rem &&
-- 
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