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  1. /**
  2.  * @module cinstruction
  3.  * @author Guenther Neuwirth (0626638), Manuel Mausz (0728348)
  4.  * @brief  Abstract class for displays
  5.  * @date   13.05.2009
  6.  */
  7.  
  8. #include <sstream>
  9. #include <stdexcept>
  10. #include <boost/lexical_cast.hpp>
  11. #include <assert.h>
  12. #include "cinstruction.h"
  13. #include "ccpu.h"
  14.  
  15. using namespace std;
  16.  
  17. const unsigned CInstruction::parseRegister(const std::string& str)
  18. {
  19.   unsigned reg;
  20.   if (str.length() < 2 || str[0] != 'r')
  21.     throw runtime_error("Invalid syntax of register");
  22.  
  23.   try
  24.   {
  25.     reg = boost::lexical_cast<unsigned>(str.substr(1));
  26.   }
  27.   catch(boost::bad_lexical_cast& ex)
  28.   {
  29.     throw runtime_error("Invalid syntax of register");
  30.   }
  31.  
  32.   return reg;
  33. }
  34.  
  35. /*----------------------------------------------------------------------------*/
  36.  
  37. inline void CInstruction::checkRegister(CCPU *cpu, const unsigned regidx)
  38. {
  39.   assert(cpu != NULL);
  40.   if (regidx >= cpu->getRegisterCount())
  41.   {
  42.     stringstream sstr;
  43.     sstr << "Register R" << regidx << " doesn't exist (out of bound)";
  44.     throw runtime_error(sstr.str());
  45.   }
  46. }
  47.  
  48. /* vim: set et sw=2 ts=2: */
  49.