Restructured repository.HEADmaster

1 files changed, 252 insertions, 0 deletions

diff --git a/src/hand.cpp b/src/hand.cpp
new file mode 100644
index 0000000..bc4fb7a
--- /dev/null
+++ b/src/hand.cpp
@@ -0,0 +1,252 @@
+#include "hand.h"
+
+bool Hand::agari(const Tiles& tiles) {
+	return basic_format(tiles);
+}
+
+bool Hand::tenpai(const Tiles& tiles) {
+	return basic_format_tenpai(tiles);
+}
+
+List<Sets> Hand::get_breakdowns(const Tiles& tiles) {
+	List<Sets> hands;
+	
+	basic_format(tiles, hands);
+	
+	return hands;
+}
+
+bool Hand::basic_format(const Tiles& tiles, bool pair_eaten) {
+	if(!tiles) {
+		return true; // All tiles eaten.
+	}
+	
+	Tiles rest;
+	
+	if(!pair_eaten) {
+		rest = tiles;
+		if(eat_pair(rest) && basic_format(rest, true)) {
+			return true;
+		}
+	}
+	
+	if(tiles.size() < 3) {
+		return false;
+	}
+	
+	rest = tiles;
+	if(eat_pon(rest) && basic_format(rest, pair_eaten)) {
+		return true;
+	}
+	
+	rest = tiles;
+	if(eat_chi(rest) && basic_format(rest, pair_eaten)) {
+		return true;
+	}
+	
+	return false;
+}
+
+void Hand::basic_format(const Tiles& tiles, List<Sets>& hands, const Sets& hand, bool pair_eaten) {
+	if(!tiles) {
+		hands.push_back(hand);
+		return; // All tiles eaten.
+	}
+	
+	Tiles rest;
+	Sets new_hand;
+	
+	if(!pair_eaten) {
+		rest = tiles;
+		new_hand = hand;
+		if(eat_pair(rest, new_hand)) {
+			basic_format(rest, hands, new_hand, true);
+		}
+	}
+	
+	if(tiles.size() < 3) {
+		return;
+	}
+	
+	rest = tiles;
+	new_hand = hand;
+	if(eat_pon(rest, new_hand)) {
+		basic_format(rest, hands, new_hand, pair_eaten);
+	}
+	
+	rest = tiles;
+	new_hand = hand;
+	if(eat_chi(rest, new_hand)) {
+		basic_format(rest, hands, new_hand, pair_eaten);
+	}
+}
+
+bool Hand::basic_format_tenpai(const Tiles& tiles, bool pair_eaten, bool wait_eaten) {
+	if(!tiles) {
+		return true;
+	}
+	
+	Tiles rest;
+	
+	if(!pair_eaten && !wait_eaten) {
+		rest = tiles;
+		if(eat_tanki(rest) && basic_format_tenpai(rest, true, true)) {
+			return true;
+		}
+	}
+	
+	if(tiles.size() < 2) {
+		return false;
+	}
+	
+	if(!pair_eaten) {
+		rest = tiles;
+		if(eat_pair(rest) && basic_format_tenpai(rest, true, wait_eaten)) {
+			return true;
+		}
+	}
+	
+	if(!wait_eaten) {
+		rest = tiles;
+		if(eat_chi_wait(rest) && basic_format_tenpai(rest, pair_eaten, true)) {
+			return true;
+		}
+	}
+	
+	if(tiles.size() < 3) {
+		return false;
+	}
+	
+	rest = tiles;
+	if(eat_pon(rest) && basic_format_tenpai(rest, pair_eaten, wait_eaten)) {
+		return true;
+	}
+	
+	rest = tiles;
+	if(eat_chi(rest) && basic_format_tenpai(rest, pair_eaten, wait_eaten)) {
+		return true;
+	}
+	
+	return false;
+}
+
+bool Hand::eat_tanki(Tiles& tiles) {
+	tiles.erase(tiles.begin());
+	return true;
+}
+
+bool Hand::eat_chi_wait(Tiles& tiles) {
+	Tile::Set set = tiles.front().get_set();
+	int num = tiles.front().get_num();
+	
+	if(set == Tile::Honor || num > 8) {
+		return false;
+	}
+	
+	// Look for T+1.
+	Tiles::iterator it = std::find(tiles.begin(), tiles.end(), Tile(set, num + 1));
+	if(it != tiles.end()) {
+		tiles.erase(it);
+		tiles.erase(tiles.begin());
+		return true;
+	}
+	
+	if(num > 7) {
+		return Tiles();
+	}
+	
+	// Look for T+2.
+	it = std::find(tiles.begin(), tiles.end(), Tile(set, num + 2));
+	if(it != tiles.end()) {
+		tiles.erase(it);
+		tiles.erase(tiles.begin());
+		return true;
+	}
+	
+	return false;
+}
+
+bool Hand::eat_pair(Tiles& tiles) {
+	if(tiles[0] == tiles[1]) {
+		tiles.erase(tiles.begin(), tiles.begin() + 2);
+		return true;
+	}
+	return false;
+}
+
+bool Hand::eat_pair(Tiles& tiles, Sets& hand) {
+	if(tiles[0] == tiles[1]) {
+		hand.push_back(Set(Set::Pair, Tiles(tiles.begin(), tiles.begin() + 2), false));
+		tiles.erase(tiles.begin(), tiles.begin() + 2);
+		return true;
+	}
+	return false;
+}
+
+bool Hand::eat_pon(Tiles& tiles) {
+	if(tiles[0] == tiles[2]) {
+		tiles.erase(tiles.begin(), tiles.begin() + 3);
+		return true;
+	}
+	return false;
+}
+
+bool Hand::eat_pon(Tiles& tiles, Sets& hand) {
+	if(tiles[0] == tiles[2]) {
+		hand.push_back(Set(Set::Pon, Tiles(tiles.begin(), tiles.begin() + 3), false));
+		tiles.erase(tiles.begin(), tiles.begin() + 3);
+		return true;
+	}
+	return false;
+}
+
+bool Hand::eat_chi(Tiles& tiles) {
+	Tile::Set set = tiles.front().get_set();
+	int num = tiles.front().get_num();
+	
+	if(set == Tile::Honor || num > 7) {
+		// Can't be chi-ed.
+		return false;
+	}
+	
+	Tiles::iterator it1 = std::find(tiles.begin(), tiles.end(), Tile(set, num + 1));
+	if(it1 != tiles.end()) {
+		Tiles::iterator it2 = std::find(tiles.begin(), tiles.end(), Tile(set, num + 2));
+		if(it2 != tiles.end()) {
+			// We can eat a chi of tiles.
+			tiles.erase(it2);
+			tiles.erase(it1);
+			tiles.erase(tiles.begin());
+			return true;
+		}
+	}
+	return false;
+}
+
+bool Hand::eat_chi(Tiles& tiles, Sets& hand) {
+	Tile::Set set = tiles.front().get_set();
+	int num = tiles.front().get_num();
+	
+	if(set == Tile::Honor || num > 7) {
+		// Can't be chi-ed.
+		return false;
+	}
+	
+	Tiles::iterator it1 = std::find(tiles.begin(), tiles.end(), Tile(set, num + 1));
+	if(it1 != tiles.end()) {
+		Tiles::iterator it2 = std::find(tiles.begin(), tiles.end(), Tile(set, num + 2));
+		if(it2 != tiles.end()) {
+			// We can eat a chi of tiles.
+			Tiles chi;
+			chi.push_back(tiles.front());
+			chi.push_back(*it1);
+			chi.push_back(*it2);
+			hand.push_back(Set(Set::Chi, chi, false));
+			tiles.erase(it2);
+			tiles.erase(it1);
+			tiles.erase(tiles.begin());
+			return true;
+		}
+	}
+	return false;
+}