initial commit

terminal/terminal.hpp

@@ -0,0 +1,100 @@
+/*
+    This file is part of TON Blockchain Library.
+
+    TON Blockchain Library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    TON Blockchain Library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with TON Blockchain Library.  If not, see <http://www.gnu.org/licenses/>.
+
+    Copyright 2017-2019 Telegram Systems LLP
+*/
+#pragma once
+
+#include "terminal.h"
+#include <iostream>
+#include "td/utils/port/FileFd.h"
+#include "td/utils/port/StdStreams.h"
+#include <queue>
+
+namespace td {
+
+class TerminalLogInterface : public LogInterface {
+ public:
+  void append(CSlice slice, int log_level) override;
+};
+
+class TerminalIOImpl : public TerminalIO, td::ObserverBase {
+ public:
+  void refresh() {
+  }
+  void update_prompt(std::string new_prompt) override {
+    prompt_ = new_prompt;
+    refresh();
+  };
+  void update_callback(std::unique_ptr<Callback> callback) override {
+    callback_ = std::move(callback);
+  }
+  void deactivate_readline();
+  void reactivate_readline();
+  void output_line(std::string line) override;
+  void set_log_interface() override;
+  //void read_line();
+  void loop() override;
+  void start_up() override;
+  void tear_down() override;
+
+  static TerminalIOImpl *instance() {
+    return instance_;
+  }
+
+  void notify() override {
+    // NB: Interface will be changed
+    td::actor::send_closure_later(self_, &TerminalIOImpl::on_net);
+  }
+  void on_net() {
+    loop();
+  }
+  TerminalIOImpl(std::string prompt, bool use_readline, std::unique_ptr<Callback> callback)
+      : prompt_(prompt), use_readline_(use_readline), callback_(std::move(callback)) {
+  }
+
+  int stdin_getc();
+  void line_cb(std::string line);
+  static int s_stdin_getc(FILE *);
+  static void s_line(char *line);
+
+  td::Result<td::BufferSlice> process_stdin(td::ChainBufferReader *buffer);
+
+ private:
+  static constexpr td::uint32 buf_size = 1 << 20;
+  td::BufferedStdin stdin_;
+
+  std::string prompt_;
+  bool use_readline_ = false;
+  std::unique_ptr<Callback> callback_;
+  std::mutex out_mutex_;
+
+  char buf_[buf_size];
+  td::uint32 buf_start_ = 0;
+  td::uint32 buf_end_ = 0;
+
+  static TerminalIOImpl *instance_;
+  td::actor::ActorId<TerminalIOImpl> self_;
+  std::unique_ptr<TerminalLogInterface> log_interface_;
+
+  td::uint32 saved_point_;
+  std::string saved_line_;
+  size_t buffer_pos_ = 0;
+
+  std::queue<td::BufferSlice> cmd_queue_;
+};
+
+}  // namespace td