Method evaluateExpression

Engine/source/console/telnetDebugger.cpp:859–929

}

void TelnetDebugger::evaluateExpression(const char *tag, S32 frame, const char *evalBuffer)
{
   // Make sure we're passing a valid frame to the eval.
   if ( frame > gEvalState.getStackDepth() )
      frame = gEvalState.getStackDepth() - 1;
   if ( frame < 0 )
      frame = 0;

   // Local variables use their own memory management and can't be queried by just executing
   // TorqueScript, we have to go digging into the interpreter.
   S32 evalBufferLen = dStrlen(evalBuffer);
   bool isEvaluatingLocalVariable = evalBufferLen > 0 && evalBuffer[0] == '%';
   if (isEvaluatingLocalVariable)
   {
      // See calculation of current frame in pushing a reference frame for console exec, we need access
      // to the proper scope.
      //frame = gEvalState.getTopOfStack() - frame - 1;
      S32 stackIndex = gEvalState.getTopOfStack() - frame - 1;

      const char* format = "EVALOUT %s %s\r\n";

      gEvalState.pushDebugFrame(stackIndex);

      Dictionary& stackFrame = gEvalState.getCurrentFrame();
      StringTableEntry functionName = stackFrame.scopeName;
      StringTableEntry namespaceName = stackFrame.scopeNamespace->mName;
      StringTableEntry varToLookup = StringTable->insert(evalBuffer);

      S32 registerId = stackFrame.code->variableRegisterTable.lookup(namespaceName, functionName, varToLookup);

      if (registerId == -1)
      {
         // ERROR, can't read the variable!
         send("EVALOUT \"\" \"\"");
         return;
      }

      const char* varResult = gEvalState.getLocalStringVariable(registerId);

      gEvalState.popFrame();

      S32 len = dStrlen(format) + dStrlen(tag) + dStrlen(varResult);
      char* buffer = new char[len];
      dSprintf(buffer, len, format, tag, varResult[0] ? varResult : "\"\"");

      send(buffer);
      delete[] buffer;

      return;
   }

   // Build a buffer just big enough for this eval.
   const char* format = "return %s;";
   dsize_t len = dStrlen( format ) + dStrlen( evalBuffer );
   char* buffer = new char[ len ];
   dSprintf( buffer, len, format, evalBuffer );

   // Execute the eval.