CModuleCommand.cpp

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/*
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                       Version 2, June 1991

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*/
static const char* Copyright = "(C) Copyright Ron Fox 2002, All rights reserved";

#include "CModuleCommand.h"  
#include "CModuleCreator.h"
#include "CReadableObject.h"
#include "CReadOrder.h"
#include <tcl.h>
#include <algorithm>
#include <assert.h>
#include <TCLInterpreter.h>
#include <TCLResult.h>



CModuleCommand::CModuleCommand (CTCLInterpreter* pInterp,
                                CDigitizerDictionary* pDictionary,
                                const string&         rCommand) :
  CTCLProcessor(rCommand, pInterp),
  m_pModules(pDictionary)
{
   Register();
} 
 CModuleCommand::~CModuleCommand ( )
{
 
}

// Functions for class CModuleCommand

int 
CModuleCommand::operator()(CTCLInterpreter& rInterp, 
                           CTCLResult& rResult, 
                           int nArgs, char** pArgs)  
{ 
   int status;

   // Skip over the 'module' string.
   nArgs--;
   pArgs++;
   if(nArgs <= 0) {
     status = TCL_ERROR;
     rResult = Usage();
   }
   else {
   
     string operation(*pArgs);        // First parameter.
     // operation is either one of the command switches or
     // it is the name of a module:
     
     if( operation == string("-list")) {  // list modules:
       nArgs--;
       pArgs++;    // point to next param.
       status = List(rInterp, rResult, nArgs, pArgs);
     }
     else if( operation == string("-delete")) { // Delete module
       nArgs--; 
       pArgs++;
       status = Delete(rInterp, rResult, nArgs, pArgs);
     }
     else if( operation == string("-types")) { // List types.
       nArgs--;
       pArgs++;
       status = ListTypes(rInterp, rResult, nArgs, pArgs);
     }
     else {                        // New module.
       status = Create(rInterp, rResult, nArgs, pArgs);
     }
     return status;
   }  
}
int 
CModuleCommand::Create(CTCLInterpreter& rInterp, 
                       CTCLResult& rResult, 
                       int  nArgs, char** pArgs)  
{ 
   int status = TCL_OK;
 // Require the module name and type be present at least:
   
   if(nArgs < 2) {
      rResult = Usage();
      status  = TCL_ERROR;
   }
   else {
      string ModuleName(pArgs[0]);
      string Moduletype(pArgs[1]);
      
      // Determine if this is a duplicate module:
      
      if(DigitizerFind(ModuleName) != DigitizerEnd()) {
         rResult  = "Duplicate module name: ";
         rResult += ModuleName;
         status = TCL_ERROR;
      }
      else {
         // Locate the matching Creator:
        
        CreatorIterator i = FindCreator(Moduletype);
        if(i == CreatorEnd()) {
          rResult  = "Unable create module type: ";
          rResult += Moduletype;
          rResult += " does not have an associated creator";
          status = TCL_ERROR;
        }
        else {
          CReadableObject* pModule = (*i)->Create(rInterp,
                                                  rResult,
                                                  nArgs,
                                                  pArgs);
          if(! pModule) {
            rResult += "Unable to create module";
            status = TCL_ERROR;
          }
          else {
            m_pModules->DigitizerAdd(pModule);
          }
        }
      }
   }
   return status;
}  

int 
CModuleCommand::List(CTCLInterpreter& rInterp, 
                     CTCLResult& rResult, 
                     int nArgs, char** pArgs)  
{ 
   int nStatus = TCL_OK;
   // Figure out the match
   // pattern.  If none is supplied, it's *.
   
   char* pPattern = "*";
   if(nArgs > 1) {
      rResult =  "Too many parameters: \n";
      rResult += Usage();
      nStatus = TCL_ERROR;
   }
   else {                      
      if(nArgs) {             // This is really exactly one parameter : pattern.
        pPattern = *pArgs;    // Update the pattern.
      }
         
      // Next iterate through the modules in the map
      // adding appropriate modules to the list>
      // Note that an empty list is an acceptable result.
      
      ListGatherer gather(rResult, pPattern);
      for_each(DigitizerBegin(), DigitizerEnd(),
               gather);
   }
   return nStatus;
}  

int 
CModuleCommand::Delete(CTCLInterpreter& rInterp, 
                       CTCLResult& rResult, 
                       int nArgs, char** pArgs)  
{
   int nStatus = TCL_OK;
   
   // first validate the syntax.  There should only be
   // one parameter and that will be a module name:
   
  if(nArgs != 1)  {
      rResult  = "Extra parameters following module -delete \n";
      rResult += Usage();
      nStatus  = TCL_ERROR;
   }
   else {
      string sName(*pArgs);            // Name to delete.
      CDigitizerDictionary::ModuleIterator p = DigitizerFind(sName);
      if(p == DigitizerEnd()) {
         nStatus  = TCL_ERROR;
         rResult  = sName;
         rResult += ": Module does not exist";
      }
      else {

         // Remove the module from the map and...

         CReadableObject* pModule = p->second;
         assert(pModule);       // Better be non-null!!
         m_pModules->Remove(p);
         pModule->OnDelete();   // This unlinks it from any reader.
         delete pModule;        // Destroy it.
      }
   }
   return nStatus;
}

int 
CModuleCommand::ListTypes(CTCLInterpreter& rInterp, 
                          CTCLResult& rResult, 
                          int nArgs, char** pArgs)  
{ 
   int nStatus = TCL_OK;

   if(nArgs) {                 // No more params allowed.
      rResult  = "Extra parameters after module -types\n";
      rResult += Usage();
      nStatus = TCL_ERROR;
   }
   else {
      TypesGatherer gatherer(rResult);
      for_each(CreatorBegin(), CreatorEnd(),
               gatherer);
   }
   return nStatus;
}  

void 
CModuleCommand::AddCreator(CModuleCreator* pCreator)  
{
  if(pCreator) {
    m_Creators.push_back(pCreator);
  }
}
CModuleCommand::CreatorIterator 
CModuleCommand::CreatorBegin()
{
   return m_Creators.begin();
}
CModuleCommand::CreatorIterator 
CModuleCommand::CreatorEnd()
{
   return m_Creators.end();
}
int             
CModuleCommand::CreatorSize()
{
   return m_Creators.size();
}
CDigitizerDictionary::ModuleIterator 
CModuleCommand::DigitizerBegin()
{
   return m_pModules->DigitizerBegin();
}
CDigitizerDictionary::ModuleIterator 
CModuleCommand::DigitizerEnd()
{
   return m_pModules->DigitizerEnd();
}
int               
CModuleCommand::DigitizerSize()
{
   return m_pModules->DigitizerSize();
}
string 
CModuleCommand::Usage()
{
   string usage("Usage: \n");
   string cmd = getCommandName();
   usage += "\t\t Create a module: \n\n";
   usage += '\t';
   usage += cmd;
   usage += " name type ?config_params...? \n";
   usage += "\t\t List modules whose names match a pattern\n\n";
   usage += "\t";
   usage += cmd;
   usage += "  -list ?pattern?\n";
   usage += "\t\t Delete a module\n\n";
   usage += "\t";
   usage += cmd;
   usage += "  -delete name\n";
   usage += "\t\t List types of modules that can be created\n\n";
   usage += "\t";
   usage += cmd;
   usage += "  -types\n";
   
   return usage;
}

CModuleCommand::CreatorIterator
CModuleCommand::FindCreator(const string& ModuleType)
{
  CreatorIterator i = CreatorBegin();
  while (i != CreatorEnd()) {
    if((*i)->getModuleType() == ModuleType) {
      break;
    }
    i++;
  }
  return i;

}
//  Implementation of local classes:


// ListGatherer:

void 
CModuleCommand::ListGatherer::operator()(pair<string,CReadableObject*>p)
{
  string name((p.first));
  CReadableObject* pModule = p.second;
  assert(pModule);
  string type(pModule->getType());
  if(Tcl_StringMatch(name.c_str(), m_pMatch)) {
    string element(name);
    element += " ";
    element += type;
    m_rResult.AppendElement(element.c_str());
  }
}
//   TypesGatherer:

void
CModuleCommand::TypesGatherer::operator()(CModuleCreator* pModule)
{
  assert(pModule);
  m_rResult += pModule->getModuleType();
  m_rResult += "\t-\t";
  m_rResult += pModule->Help();
  m_rResult += "\n";
}

---