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crypto/vm/cells/VirtualizationParameters.h

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+/*
+    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 "td/utils/int_types.h"
+#include "td/utils/logging.h"
+
+#include <limits>
+
+namespace vm {
+namespace detail {
+class VirtualizationParameters {
+ public:
+  static constexpr td::uint8 max_level() {
+    return std::numeric_limits<td::uint8>::max();
+  }
+
+  VirtualizationParameters() = default;
+
+  VirtualizationParameters(td::uint8 level, td::uint8 virtualization) : level_(level), virtualization_(virtualization) {
+    CHECK(virtualization_ != 0 || empty());
+  }
+
+  bool empty() const {
+    return level_ == max_level() && virtualization_ == 0;
+  }
+
+  VirtualizationParameters apply(VirtualizationParameters outer) const {
+    if (outer.level_ >= level_) {
+      return *this;
+    }
+    CHECK(virtualization_ <= outer.virtualization_);
+    return {outer.level_, outer.virtualization_};
+  }
+
+  td::uint8 get_level() const {
+    return level_;
+  }
+
+  td::uint8 get_virtualization() const {
+    return virtualization_;
+  }
+
+  bool operator==(const VirtualizationParameters &other) const {
+    return level_ == other.level_ && virtualization_ == other.virtualization_;
+  }
+
+ private:
+  td::uint8 level_ = max_level();
+  td::uint8 virtualization_ = 0;
+};
+inline td::StringBuilder &operator<<(td::StringBuilder &sb, const VirtualizationParameters &virt) {
+  return sb << "{level: " << virt.get_level() << ", virtualization: " << virt.get_virtualization() << "}";
+}
+}  // namespace detail
+}  // namespace vm