initial commit

crypto/vm/dispatch.cpp

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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
+*/
+#include "vm/dispatch.h"
+#include "vm/excno.hpp"
+#include <cassert>
+#include <map>
+#include <mutex>
+
+namespace vm {
+
+namespace {
+std::mutex dispatch_tables_mutex;
+std::map<int, const DispatchTable*> dispatch_tables;
+}  // namespace
+
+DummyDispatchTable dummy_dispatch_table;
+
+bool DispatchTable::register_table(Codepage _cp, const DispatchTable& dt) {
+  assert(dt.is_final());
+  int cp = (int)_cp;
+  if (cp < -0x8000 || cp >= 0x8000 || cp == -1) {
+    return false;
+  } else {
+    std::lock_guard<std::mutex> guard(dispatch_tables_mutex);
+    return dispatch_tables.emplace(cp, &dt).second;
+  }
+}
+
+bool DispatchTable::register_table(Codepage cp) const {
+  return register_table(cp, *this);
+}
+
+const DispatchTable* DispatchTable::get_table(Codepage cp) {
+  return get_table((int)cp);
+}
+
+const DispatchTable* DispatchTable::get_table(int cp) {
+  std::lock_guard<std::mutex> guard(dispatch_tables_mutex);
+  auto entry = dispatch_tables.find(cp);
+  return entry != dispatch_tables.end() ? entry->second : 0;
+}
+
+int DummyDispatchTable::dispatch(VmState* st, CellSlice& cs) const {
+  throw VmError{Excno::inv_opcode, "empty opcode table"};
+}
+
+std::string DummyDispatchTable::dump_instr(CellSlice& cs) const {
+  return "";
+}
+
+int DummyDispatchTable::instr_len(const CellSlice& cs) const {
+  return 0;
+}
+
+}  // namespace vm