file: error.cc


/*
   This file contains the longer methods for the error class 
   declared in error.h.  The methods included are:
   
   unsigned short int operator() (filter_error err,         //OVERLOAD CALL: operator: error.cc(arg_out), error.cc(error), error.cc(error), error.cc(error), filter.cc(foo), filtermain.cc(comp_String), direct.cpp(include), direct.cpp(define), direct.cpp(ifdef), direct.cpp(ifndef), direct.cpp(_else), direct.cpp(endif)
                               const vector<unsigned short int>& args, 
			       unsigned short int mask) const
			  -error handler for filter class
 
   Revision History:
   first made: 3/4/96 by John Langford
*/

#include "error.h"

//used by stl
struct arg_out{
};
void arg_out::operator() (unsigned short int in)
{
  cerr << in << " ";
}

/*
  unsigned short int operator() (filter_error err,         //OVERLOAD CALL: operator: error.cc(arg_out), error.cc(error), error.cc(error), error.cc(error), filter.cc(foo), filtermain.cc(comp_String), direct.cpp(include), direct.cpp(define), direct.cpp(ifdef), direct.cpp(ifndef), direct.cpp(_else), direct.cpp(endif)
			       const vector<unsigned short int>& args, 
			       unsigned short int mask) const
  
  Description:      Handles the errors for the filter class.

  Arguments:         filter_error err  -type of error
                     const vector<unsigned short int>& args -a vector of 
		                  unsigned short int's involved in the error
		     unsigned short int mask  -a bitfield involved in the error

   Return Value:     None.

   Inputs:           None.
   Outputs:          Error messages.

   Error Handling:   Hah!

   Algorithms:       None.
   Data Structures:  None.

   Last Modified:    3/4/97
*/
unsigned short int error::operator() (filter_error err, 
			       const vector<unsigned short int>& args, 
			       unsigned short int mask) const
{
  switch (err){
  case OVERSIZE_MASK:
    {
      cerr << "bitfield mask " << hex << mask << dec << "of opcode too large"
	   << " for machine opcodes" << endl;
      return mask & (unsigned short int)4095;
    }
  case OVERSIZE_FIELD:
    {
      cerr << "Field to large: " << mask << " greater than opcode size." <<endl;
      return 0;
    }
  case WRONG_ARGUMENT_COUNT:
    {
      cerr << "wrong number of arguments to opcode " << hex << mask << dec 
	   << " arguments are: ";
      for_each(args.begin(),args.end(),arg_out());
      cerr << endl;
      return mask;
    }
  case OVERSIZE_ARGUMENT:
    {
      cerr << "error, argument too large for bitfield " << hex << mask << dec
	   << endl;
      return 0;
    }   
  }
  cerr << "unknown error" << endl;
  return 0;
}

/*
  void operator() (resolution_error err, const line& in, const String& arg)         //OVERLOAD CALL: operator: error.cc(arg_out), error.cc(error), error.cc(error), error.cc(error), filter.cc(foo), filtermain.cc(comp_String), direct.cpp(include), direct.cpp(define), direct.cpp(ifdef), direct.cpp(ifndef), direct.cpp(_else), direct.cpp(endif)
  const
  
  Description:      Handles the errors for the resolved_line class.

  Arguments:         resolution_error err  -type of error
                     line in -line which generated the error
		     arg -string associated with error.

  Return Value:     None.

  Inputs:           None.
  Outputs:          Error messages.
  
  Error Handling:   Hah!
  
  Algorithms:       None.
  Data Structures:  None.
  
  Last Modified:    3/4/97
*/
void error::operator() (resolution_error err,const line& in, 
				      const String& arg) const
{
  switch (err){
  case UNRESOLVABLE:
    {
      cerr << "unresolved symbol, " << arg << ", in ";
      break;
   }
  case UNRESOLVABLE_ORG:
    {
      cerr << "org not resolvable at line ";
      break;
    }
  case BAD_ARGUMENT_1:
    {
      cerr << "Bad argument 1 to EQU or label ";
      break;
    }
  case BAD_ARGUMENT_2:
    {
      cerr << "Bad argument 2 to EQU ";
      break;
    }
  case DOUBLE_IDENTIFICATION:
    {
      cerr << "error, identifier, " << arg << " previously defined ";
      break;
    }   
  }
  in.printstate();
}
/*
  void operator() (resolution_error err, const line& in1, const line& in2)         //OVERLOAD CALL: operator: error.cc(arg_out), error.cc(error), error.cc(error), error.cc(error), filter.cc(foo), filtermain.cc(comp_String), direct.cpp(include), direct.cpp(define), direct.cpp(ifdef), direct.cpp(ifndef), direct.cpp(_else), direct.cpp(endif)
  const
  
  Description:      Handles the errors for the object class.

  Arguments:         resolution_error err  -type of error
                     line in1 -line associated with error
		     line in2 -another line associated with the error.

   Return Value:     None.

   Inputs:           None.
   Outputs:          Error messages.

   Error Handling:   Hah!

   Algorithms:       None.
   Data Structures:  None.

   Last Modified:    3/4/97
*/
void error::operator() (object_error err,const line& in1, 
			const line& in2) const
{
  switch (err){
  case DOUBLE_MAP
    {
      cerr << "Two compiled lines map onto same location in object code " 
      break;
    }
  }
  in1.printstate();
  in2.printstate();
}



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