implement episode 3 battles

src/Episode3/MapState.hh

@@ -0,0 +1,63 @@
+#pragma once
+
+#include <stdint.h>
+
+#include <memory>
+
+#include "../Text.hh"
+#include "DataIndex.hh"
+
+namespace Episode3 {
+
+
+
+struct MapState {
+  le_uint16_t width;
+  le_uint16_t height;
+  parray<parray<uint8_t, 0x10>, 0x10> tiles;
+  parray<parray<uint8_t, 6>, 2> start_tile_definitions;
+
+  MapState();
+  void clear();
+
+  void print(FILE* stream) const;
+} __attribute__((packed));
+
+struct MapAndRulesState {
+  MapState map;
+  uint8_t num_players;
+  uint8_t unused1;
+  uint8_t unused_by_server;
+  uint8_t num_players_per_team;
+  uint8_t num_team0_players;
+  uint8_t unused2;
+  le_uint16_t start_facing_directions;
+  uint32_t unused3;
+  le_uint32_t map_number;
+  uint32_t unused4;
+  Rules rules;
+  uint32_t unused5;
+
+  MapAndRulesState();
+  void clear();
+
+  bool loc_is_within_bounds(uint8_t x, uint8_t y) const;
+  bool tile_is_vacant(uint8_t x, uint8_t y);
+
+  void set_occupied_bit_for_tile(uint8_t x, uint8_t y);
+  void clear_occupied_bit_for_tile(uint8_t x, uint8_t y);
+} __attribute__((packed));
+
+struct OverlayState {
+  parray<parray<uint8_t, 0x10>, 0x10> tiles;
+  parray<le_uint32_t, 5> unused1;
+  parray<le_uint32_t, 0x10> unused2;
+  parray<le_uint16_t, 0x10> unused3;
+
+  OverlayState();
+  void clear();
+} __attribute__((packed));
+
+
+
+} // namespace Episode3