initial port of the new interpreter

Engine/source/console/consoleValueStack.h

@@ -0,0 +1,121 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) 2013 GarageGames, LLC
+// Copyright (c) 2021 TGEMIT Authors & Contributors
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//-----------------------------------------------------------------------------
+
+#ifndef _CONSOLE_CONSOLE_VALUE_STACK_H_
+#define _CONSOLE_CONSOLE_VALUE_STACK_H_
+
+template<S32 StackSize>
+class ConsoleValueStack
+{
+   constexpr static S32 allocatorSize = sizeof(ConsoleValue) * StackSize;
+
+   struct Frame
+   {
+      ConsoleValue* values;
+      S32 count;
+      S32 internalCounter;
+   };
+
+   Vector<Frame> stack;
+   char* memory;
+   S32 sp;
+
+   TORQUE_FORCEINLINE Frame alloc(S32 count)
+   {
+      AssertFatal(sp + count * sizeof(ConsoleValue) < allocatorSize, "ConsoleValueStack overflow");
+
+      ConsoleValue* ret = reinterpret_cast<ConsoleValue*>(memory + sp);
+      sp += count * sizeof(ConsoleValue);
+
+      return { ret, count, 1 };
+   }
+
+   TORQUE_FORCEINLINE void deAlloc(S32 count)
+   {
+      sp -= count * sizeof(ConsoleValue);
+      AssertFatal(sp >= 0, "Popped ConsoleValueStack too far, underflow");
+   }
+
+public:
+   ConsoleValueStack()
+   {
+      memory = (char*)dMalloc(allocatorSize);
+      for (S32 i = 0; i < allocatorSize; i += sizeof(ConsoleValue))
+      {
+         constructInPlace<ConsoleValue>(reinterpret_cast<ConsoleValue*>(memory + i));
+      }
+      sp = 0;
+   }
+
+   ~ConsoleValueStack()
+   {
+      dFree(memory);
+   }
+
+   TORQUE_FORCEINLINE void pushFrame(S32 count)
+   {
+      AssertISV(count >= 0, "Must be >= 0 when pushing stack frame");
+
+      // +1 for function name in argv[0]
+      const Frame& frame = alloc(count + 1);
+      stack.push_back(frame);
+   }
+
+   TORQUE_FORCEINLINE void popFrame()
+   {
+      AssertISV(stack.size() > 0, "Stack Underflow");
+
+      deAlloc(stack.last().count);
+      stack.pop_back();
+   }
+
+   TORQUE_FORCEINLINE void pushInt(S64 value)
+   {
+      Frame& frame = stack.last();
+      frame.values[frame.internalCounter++].setInt(value);
+   }
+
+   TORQUE_FORCEINLINE void pushFloat(F64 value)
+   {
+      Frame& frame = stack.last();
+      frame.values[frame.internalCounter++].setFloat(value);
+   }
+
+   TORQUE_FORCEINLINE void pushString(const char* value, S32 len)
+   {
+      Frame& frame = stack.last();
+      frame.values[frame.internalCounter++].setString(value, len);
+   }
+
+   TORQUE_FORCEINLINE void argvc(StringTableEntry fn, S32& argc, ConsoleValue** argv)
+   {
+      Frame& frame = stack.last();
+      argc = frame.count;
+
+      // First param is always function name
+      frame.values[0].setStringTableEntry(fn);
+      *argv = frame.values;
+   }
+};
+
+#endif