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366 lines (314 loc) · 10.3 KB
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// Copyright 2018 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "cc/gtp_player.h"
#include <cctype>
#include <iomanip>
#include <iostream>
#include <utility>
#include "absl/strings/str_cat.h"
#include "absl/strings/str_join.h"
#include "absl/strings/str_split.h"
#include "absl/time/clock.h"
#include "cc/constants.h"
namespace minigo {
GtpPlayer::GtpPlayer(std::unique_ptr<DualNet> network, const Options& options)
: MctsPlayer(std::move(network), options),
name_(options.name),
num_readouts_(options.num_readouts) {}
bool GtpPlayer::HandleCmd(const std::string& line) {
std::vector<absl::string_view> args =
absl::StrSplit(line, absl::ByAnyChar(" \t\r\n"), absl::SkipWhitespace());
if (args.empty()) {
std::cout << "=" << std::endl;
return true;
}
// Split the GTP command and its arguments.
auto cmd = args[0];
args.erase(args.begin());
if (cmd == "quit") {
std::cout << "=\n\n" << std::flush;
return false;
}
auto response = DispatchCmd(cmd, args);
std::cout << (response.ok ? "=" : "?");
if (!response.str.empty()) {
std::cout << " " << response.str;
}
std::cout << "\n\n" << std::flush;
return true;
}
absl::Span<MctsNode* const> GtpPlayer::TreeSearch(int batch_size) {
auto leaves = MctsPlayer::TreeSearch(batch_size);
if (!leaves.empty() && report_search_interval_ != absl::ZeroDuration()) {
auto now = absl::Now();
if (now - last_report_time_ > report_search_interval_) {
last_report_time_ = now;
ReportSearchStatus(leaves.back());
}
}
return leaves;
}
GtpPlayer::Response GtpPlayer::CheckArgsExact(
absl::string_view cmd, size_t expected_num_args,
const std::vector<absl::string_view>& args) {
if (args.size() != expected_num_args) {
return Response::Error("expected ", expected_num_args,
" args for GTP command ", cmd, ", got ", args.size(),
" args: ", absl::StrJoin(args, " "));
}
return Response::Ok();
}
GtpPlayer::Response GtpPlayer::CheckArgsRange(
absl::string_view cmd, size_t expected_min_args, size_t expected_max_args,
const std::vector<absl::string_view>& args) {
if (args.size() < expected_min_args || args.size() > expected_max_args) {
return Response::Error("expected between ", expected_min_args, " and ",
expected_max_args, " args for GTP command ", cmd,
", got ", args.size(),
" args: ", absl::StrJoin(args, " "));
}
return Response::Ok();
}
GtpPlayer::Response GtpPlayer::DispatchCmd(
absl::string_view cmd, const std::vector<absl::string_view>& args) {
if (cmd == "boardsize") {
return HandleBoardsize(cmd, args);
} else if (cmd == "clear_board") {
return HandleClearBoard(cmd, args);
} else if (cmd == "echo") {
return HandleEcho(cmd, args);
} else if (cmd == "final_score") {
return HandleFinalScore(cmd, args);
} else if (cmd == "gamestate" || cmd == "mg_gamestate") {
return HandleGamestate(cmd, args);
} else if (cmd == "genmove" || cmd == "mg_genmove") {
return HandleGenmove(cmd, args);
} else if (cmd == "info") {
return HandleInfo(cmd, args);
} else if (cmd == "name") {
return HandleName(cmd, args);
} else if (cmd == "play") {
return HandlePlay(cmd, args);
} else if (cmd == "readouts") {
return HandleReadouts(cmd, args);
} else if (cmd == "report_search_interval") {
return HandleReportSearchInterval(cmd, args);
}
return Response::Error("unknown command");
}
GtpPlayer::Response GtpPlayer::HandleBoardsize(
absl::string_view cmd, const std::vector<absl::string_view>& args) {
auto response = CheckArgsExact(cmd, 1, args);
if (!response.ok) {
return response;
}
int x;
if (!absl::SimpleAtoi(args[0], &x) || x != kN) {
return Response::Error("unacceptable size");
}
return Response::Ok();
}
GtpPlayer::Response GtpPlayer::HandleClearBoard(
absl::string_view cmd, const std::vector<absl::string_view>& args) {
auto response = CheckArgsExact(cmd, 0, args);
if (!response.ok) {
return response;
}
NewGame();
return Response::Ok();
}
GtpPlayer::Response GtpPlayer::HandleEcho(
absl::string_view cmd, const std::vector<absl::string_view>& args) {
return Response::Ok(absl::StrJoin(args, " "));
}
GtpPlayer::Response GtpPlayer::HandleFinalScore(
absl::string_view cmd, const std::vector<absl::string_view>& args) {
auto response = CheckArgsExact(cmd, 0, args);
if (!response.ok) {
return response;
}
if (!game_over()) {
// Game isn't over yet, calculate the current score using Tromp-Taylor
// scoring.
return Response::Ok(FormatScore(root()->position.CalculateScore()));
} else {
// Game is over, we have the result available.
return Response::Ok(result_string());
}
}
GtpPlayer::Response GtpPlayer::HandleGamestate(
absl::string_view cmd, const std::vector<absl::string_view>& args) {
auto response = CheckArgsExact(cmd, 0, args);
if (!response.ok) {
return response;
}
const auto& position = root()->position;
// board field.
std::ostringstream oss;
for (const auto& stone : position.stones()) {
char ch;
if (stone.color() == Color::kBlack) {
ch = 'X';
} else if (stone.color() == Color::kWhite) {
ch = 'O';
} else {
ch = '.';
}
oss << ch;
}
std::string board = oss.str();
// toPlay field.
std::string to_play = position.to_play() == Color::kBlack ? "Black" : "White";
// lastMove field.
std::string last_move;
if (!history().empty()) {
last_move = absl::StrCat("\"", history().back().c.ToKgs(), "\"");
} else {
last_move = "null";
}
// n field.
auto n = position.n();
// q field.
auto q = root()->parent != nullptr ? root()->parent->Q() : 0;
// clang-format off
std::cerr << "mg-gamestate: {"
<< "\"board\":\"" << board << "\", "
<< "\"toPlay\":\"" << to_play << "\", "
<< "\"lastMove\":" << last_move << ", "
<< "\"n\":" << n << ", "
<< "\"q\":" << q
<< "}" << std::endl;
// clang-format on
return Response::Ok();
}
GtpPlayer::Response GtpPlayer::HandleGenmove(
absl::string_view cmd, const std::vector<absl::string_view>& args) {
auto response = CheckArgsRange(cmd, 0, 1, args);
if (!response.ok) {
return response;
}
auto c = SuggestMove(num_readouts_);
std::cerr << root()->Describe() << std::endl;
PlayMove(c);
return Response::Ok(c.ToKgs());
}
GtpPlayer::Response GtpPlayer::HandleInfo(
absl::string_view cmd, const std::vector<absl::string_view>& args) {
auto response = CheckArgsExact(cmd, 0, args);
if (!response.ok) {
return response;
}
std::ostringstream oss;
oss << options();
oss << " num_readouts: " << num_readouts_
<< " report_search_interval:" << report_search_interval_
<< " name:" << name_;
return Response::Ok(oss.str());
}
GtpPlayer::Response GtpPlayer::HandleName(
absl::string_view cmd, const std::vector<absl::string_view>& args) {
auto response = CheckArgsExact(cmd, 0, args);
if (!response.ok) {
return response;
}
return Response::Ok(name_);
}
GtpPlayer::Response GtpPlayer::HandlePlay(
absl::string_view cmd, const std::vector<absl::string_view>& args) {
auto response = CheckArgsExact(cmd, 2, args);
if (!response.ok) {
return response;
}
Color color;
if (std::tolower(args[0][0]) == 'b') {
color = Color::kBlack;
} else if (std::tolower(args[0][0]) == 'w') {
color = Color::kWhite;
} else {
std::cerr << "ERRROR: expected b or w for player color, got " << args[0]
<< std::endl;
return Response::Error("illegal move");
}
if (color != root()->position.to_play()) {
// TODO(tommadams): Allow out of turn moves.
return Response::Error("out of turn moves are not yet supported");
}
Coord c = Coord::FromKgs(args[1], true);
if (c == Coord::kInvalid) {
std::cerr << "ERRROR: expected KGS coord for move, got " << args[1]
<< std::endl;
return Response::Error("illegal move");
}
if (!root()->position.IsMoveLegal(c)) {
return Response::Error("illegal move");
}
PlayMove(c);
return Response::Ok();
}
GtpPlayer::Response GtpPlayer::HandleReadouts(
absl::string_view cmd, const std::vector<absl::string_view>& args) {
auto response = CheckArgsExact(cmd, 1, args);
if (!response.ok) {
return response;
}
int x;
if (!absl::SimpleAtoi(args[0], &x) || x <= 0) {
return Response::Error("couldn't parse ", args[0], " as an integer > 0");
} else {
num_readouts_ = x;
}
return Response::Ok();
}
GtpPlayer::Response GtpPlayer::HandleReportSearchInterval(
absl::string_view cmd, const std::vector<absl::string_view>& args) {
auto response = CheckArgsExact(cmd, 1, args);
if (!response.ok) {
return response;
}
int x;
if (!absl::SimpleAtoi(args[0], &x) || x < 0) {
return Response::Error("couldn't parse ", args[0], " as an integer >= 0");
}
report_search_interval_ = absl::Milliseconds(x);
return Response::Ok();
}
void GtpPlayer::ReportSearchStatus(const MctsNode* last_read) {
std::cerr << "mg-search:";
std::vector<const MctsNode*> path;
for (const auto* node = last_read; node != root(); node = node->parent) {
path.push_back(node);
}
for (auto it = path.rbegin(); it != path.rend(); ++it) {
std::cerr << " " << (*it)->move.ToKgs();
}
std::cerr << "\n";
std::cerr << "mg-q:";
for (int i = 0; i < kNumMoves; ++i) {
std::cerr << " " << std::fixed << std::setprecision(3)
<< (root()->child_Q(i) - root()->Q());
}
std::cerr << "\n";
std::cerr << "mg-n:";
for (const auto& edge : root()->edges) {
std::cerr << std::setprecision(0) << " " << edge.N;
}
std::cerr << "\n";
std::cerr << "mg-pv:";
for (Coord c : root()->MostVisitedPath()) {
std::cerr << " " << c.ToKgs();
}
std::cerr << "\n";
std::cerr << std::flush;
}
} // namespace minigo