From 87d7320f84926c4d10734c773ecf3cf4eb47ddc4 Mon Sep 17 00:00:00 2001
From: Joursoir <chat@joursoir.net>
Date: Wed, 17 Feb 2021 17:45:28 +0000
Subject: init project: create game field

---
 GameField.cpp | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 GameField.hpp | 37 +++++++++++++++++++++++++++
 2 files changed, 118 insertions(+)
 create mode 100644 GameField.cpp
 create mode 100644 GameField.hpp

diff --git a/GameField.cpp b/GameField.cpp
new file mode 100644
index 0000000..381275e
--- /dev/null
+++ b/GameField.cpp
@@ -0,0 +1,81 @@
+#include "GameField.hpp"
+
+bool GameField::CanMove(int x, int y)
+{
+	if(field[y][x] != G_EMPTY)
+		return false;
+	return true;
+}
+
+void GameField::Move(int x, int y)
+{
+	field[y][x] = who_move;
+	who_move = -who_move; // change player
+	free--;
+
+	UpdateState();
+}
+
+void GameField::UpdateState() 
+{
+	int tmp;
+
+	if(!free) {
+		state = G_DRAW;
+		return;
+	}
+	tmp = ScanRows();
+	if(tmp) {
+		state = tmp;
+		return;
+	}
+	tmp = ScanCols();
+	if(tmp) {
+		state = tmp;
+		return;
+	}
+	tmp = ScanDiags();
+	if(tmp) {
+		state = tmp;
+		return;
+	}
+}
+
+/* This version is a dummy */
+int GameField::ScanRows()
+{
+	int i;
+	for(i = 0; i < 3; i++) {
+		if(field[i][0] == field[i][1] && field[i][1] == field[i][2] &&
+				field[i][1] != G_EMPTY)
+			return field[i][1];
+	}
+
+	return 0;
+}
+
+/* This version is a dummy */ 
+int GameField::ScanCols()
+{
+	int i;
+	for(i = 0; i < 3; i++) {
+		if(field[0][i] == field[1][i] && field[1][i] == field[2][i] &&
+				field[1][i] != G_EMPTY)
+			return field[1][i];
+	}
+
+	return 0;
+}
+
+/* This version is a dummy */
+int GameField::ScanDiags()
+{
+	if(field[0][0] == field[1][1] && field[1][1] == field[2][2] &&
+			field[1][1] != G_EMPTY)
+		return field[1][1];
+	else if(field[0][2] == field[1][1] && field[1][1] == field[2][0] &&
+			field[1][1] != G_EMPTY)
+		return field[1][1];
+
+	return 0;
+}
diff --git a/GameField.hpp b/GameField.hpp
new file mode 100644
index 0000000..1d2af31
--- /dev/null
+++ b/GameField.hpp
@@ -0,0 +1,37 @@
+#ifndef LPG_GAMEFIELD_H
+#define LPG_GAMEFIELD_H
+
+enum states {
+	G_EMPTY = 0,
+	G_NONE,
+	G_DRAW,
+	G_XPLAYER = 10,
+	G_OPLAYER = -10
+};
+
+class GameField {
+	// optional:
+	int field[3][3];
+	int free;
+	int win_length;
+
+	// non-optional:
+	int state;
+	int who_move;
+public:
+	GameField() : field{0}, free(9), win_length(3), state(G_NONE),
+		who_move(G_XPLAYER) { }
+	~GameField() { }
+	int GetState() { return state; }
+
+	bool CanMove(int x, int y);
+	void Move(int x, int y);
+
+private:
+	void UpdateState();
+	int ScanRows();
+	int ScanCols();
+	int ScanDiags();
+};
+
+#endif /* LPG_GAMEFIELD_H */
-- 
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