/*
 * Copyright © 2011, Petro Protsyk, Denys Vuika
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *  http://www.apache.org/licenses/LICENSE-2.0
 *  
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

namespace Scripting.SSharp.Execution.Compilers
{
  using Dom;
  using VM;
  using VM.Operations;

  [CompilerType(typeof(CodeObjectFunctionCall))]
  internal class CodeObjectFunctionCallCompiler : IVMCompiler
  {
    #region IVMCompiler Members

    public ExecutableMachine Compile(CodeObject code, ExecutableMachine machine)
    {
      var call = (CodeObjectFunctionCall)code;

      // AX = function name
      // BX = parameter count

      // stack is full of parameters

      foreach (var codeParameter in call.Parameters)
      {
        CodeDomCompiler.Compile(codeParameter, machine);
        var op = machine.CreateOperation<PushOperation>();
      }
      
      var countOp = machine.CreateOperation<RegisterOperation>();
      countOp.Destination = MachineRegisters.BX;
      countOp.Value = call.Parameters.Count;

      return machine;
   }

    #endregion
  }
}