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CStateVariableCommand.cpp

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/*
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*/
static const char* Copyright = "(C) Copyright Michigan State University 2002, All rights reserved";  

#include "CStateVariableCommand.h"                  
#include "CStateVariable.h"
#include <algorithm>


// Local classes:

class ListMatches {             
private:
  string m_Pattern;
  CTCLResult& m_rResult;
public:
  ListMatches(CTCLResult& rResult, const string& rPattern) :
    m_Pattern(rPattern), m_rResult(rResult) {}

  void operator()(pair<string, CStateVariable*> i) {
    if(Tcl_StringMatch(i.first.c_str(), m_Pattern.c_str())) {
      m_rResult.AppendElement(i.first);
    }
  }

};


CStateVariableCommand::CStateVariableCommand () :
  CDAQTCLProcessor("statevar", 0)
{
}

CStateVariableCommand::~CStateVariableCommand() 
{
  StateVariableIterator i = begin();
  while (i != end()) {
    delete i->second;
    i->second = (CStateVariable*)NULL;
    i++;
  }
}

// Functions for class CStateVariableCommand

int 
CStateVariableCommand::operator()(CTCLInterpreter& rInterp, 
                                  CTCLResult& rResult, 
                                  int argc, char** argv)  
{
  // The first parameter is just the command name so it's skipped.

  argv++; argc--;

  // There must be at least one parameter left.. this would
  // be either a subcommand keyword switch, or a new variable name.

  if(!argc) {
    Usage(rResult);
    return TCL_ERROR;
  }
  // Branch out to the appropriate executor function depending on
  // the value of the next paramter:

  int status;
  if(string("-delete") == *argv) {
    argc--; argv++;
    status = Delete(rInterp, rResult, argc, argv);
  } 
  else if (string("-list") == *argv) {
    argc--; argv++;
    status = List(rInterp, rResult, argc, argv);
  }
  else {
    status = Create(rInterp, rResult, argc, argv);
  }

  return status;
}  

int 
CStateVariableCommand::Create(CTCLInterpreter& rInterp, CTCLResult& rResult, 
                              int  argc, char** argv)  
{
  // The caller has ensured that a variable name exists.

  if(argc > 1) {                // Too many parameters.
    Usage(rResult);
    return TCL_ERROR;
  }

  // Only do anything if the variable has not been created yet:

  Create(string(*argv));



  return TCL_OK;
}  

int 
CStateVariableCommand::Delete(CTCLInterpreter& rInterp, CTCLResult& rResult, 
                              int  argc, char** argv)  
{


  // There must be only one parameter

  if(argc != 1) {
    Usage(rResult);
    return TCL_ERROR;
  }

  // And that paramteer is the name of the variable to delete:
  
  char* pName = *argv;

  StateVariableIterator i = m_StateVariables.find(string(pName));
  if ( i == m_StateVariables.end()) { // No such variable:
    rResult  =  "State Variable: ";
    rResult += pName;
    rResult += " Does not exist.";
    return TCL_ERROR;
  }
  Delete(i);

  return TCL_OK;

}  

int 
CStateVariableCommand::List(CTCLInterpreter& rInterp, CTCLResult& rResult, int  argc, char** argv)  
{
  string pattern("*");
  
  // If there are parameters must be exactly 1:

  if(argc > 1) {
    Usage(rResult);
    return TCL_ERROR;
  }

  if(argc == 1) {
    pattern = *argv;
  }

  // Now we're ready to fire off the for_each:

  for_each(begin(), end(), ListMatches(rResult, pattern));

  return TCL_OK;

}  

StateVariableIterator 
CStateVariableCommand::begin()  
{
  return m_StateVariables.begin();
}  

StateVariableIterator 
CStateVariableCommand::end()  
{
  return m_StateVariables.end();
}  

size_t 
CStateVariableCommand::size()  
{
  return m_StateVariables.size();
}

void
CStateVariableCommand::Usage(CTCLResult& rResult)
{
  rResult += "Usage:\n";
  rResult += "   statevar newname\n";
  rResult += "   statevar -list ?globpattern?\n";
  rResult += "   statevar -delete name\n";

}
CStateVariable*
CStateVariableCommand::Create(const string& rName)
{
  CStateVariable* pVar(0);
  if(m_StateVariables.find(rName) == m_StateVariables.end()) {
    pVar = new CStateVariable(getInterpreter(),rName);
    m_StateVariables[rName] = pVar;
  }
  return pVar;
}
void
CStateVariableCommand::Delete(const string& rName)
{
  StateVariableIterator i = m_StateVariables.find(rName);
  if(i != m_StateVariables.end()) {
    Delete(i);
  }
}
void
CStateVariableCommand::Delete(StateVariableIterator& rIter)
{
  CStateVariable* pVar = rIter->second;
  m_StateVariables.erase(rIter);
  delete(pVar);

}       
StateVariableIterator
CStateVariableCommand::find(const string& rName)
{
  return m_StateVariables.find(rName);
}

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