source: tol/toltcl/generic/tolaccess.cpp @ e64ad71

/* tolaccess.cpp: This file implements an interface between object in tol
                  and "objects" in tclThis file define a set of utils
                  functions.
                  GNU/tolTcl Library

   Copyright (C) 2001, 2002, 2003 - Bayes Decisión, SL

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
   USA.
 */

#include <ctype.h>

#if defined(_MSC_VER)
#  include <win_tolinc.h>
#endif

#include <tol/tol_init.h>
#include <tol/tol_version_def.h>
#include <tol/tol_bcommon.h>
#include <tol/tol_bstruct.h>
#include <tol/tol_blanguag.h>
#include <tol/tol_bmatgra.h>
#include <tol/tol_bvmatgra.h>
#include <tol/tol_bnameblock.h>
#include <tol/tol_bspfun.h>
#include <tol/tol_bcodgra.h>
#include <tol/tol_bsetgra.h>
#include <tol/tol_btsrgra.h>
#include <tol/tol_btxtgra.h>
#include <tol/tol_bmethodhook.h>

#include <toltclInt.h>
#include <tt_pool.h>


/*
 * if SyntaxObject has IsFile implemented, uncomment the following
 * define:
 */

#define ISFILE_IMPLEMENTED

typedef void (* getmethod)( const BSyntaxObject *, BText & );
typedef int  (* checkmethod)( const BSyntaxObject * );

static
int QuickSort( Tcl_Interp * interp, Tcl_Obj * list );

inline 
char * skipWhite(char * pch)
{
  while (*pch && isspace(*pch))
    ++pch;
  return pch;
}

static
BText GetObjectName(const BSyntaxObject * so)
{
  // antes estaba FullName pero salian cosas como:
  // estim::cycler::_.sampler::_.buildWorkSpace
  return so->HasName() ? so->Name() : so->LocalName();
}

static
void GetName( const BSyntaxObject * so, BText & res )
{
  // antes estaba FullName pero salian cosas como:
  // estim::cycler::_.sampler::_.buildWorkSpace
  res = so->Name();
}

static
void GetFullName( const BSyntaxObject * so, BText & res )
{
  res = so->FullName();
}

static
void GetIdentify( const BSyntaxObject * so, BText & res )
{
  res = so->Identify();
}

static
void GetPath( const BSyntaxObject * so, BText & res )
{
  res = so->TolPath();
}

static
int
ExcludeAnything( const BSyntaxObject * so )
{
  return so != GraAnything();
}

static
int HasNoSource( const BSyntaxObject * so )
{
  return !so->Source();
}

static
int BList2TclList( Tcl_Interp * interp,
                   BList * blist, Tcl_Obj * tcl_list,
                   getmethod m, checkmethod accept = NULL)
{
  char * str;
  Tcl_Obj * name;
  Tcl_DString dstr;
  BText tmp;

  while(blist)
  {
    BSyntaxObject* so = (BSyntaxObject*)Car(blist);
    if(!accept || (*accept)(so))
    {
      (*m)(so,tmp);
      str = Tcl_ExternalToUtfDString(NULL,tmp,-1,&dstr);
      name = Tcl_NewStringObj(str,-1);
      Tcl_DStringFree(&dstr);
      if ( Tcl_ListObjAppendElement(interp, tcl_list, name) != TCL_OK ) {
        Tcl_DecrRefCount(name);
        return TCL_ERROR;
      }
    }
    blist = Cdr(blist);
  }
  return TCL_OK;
}

/*
 * Fill in obj_result the result of avaluating in TOL the given
 * string.
 *
 */

/* cdr of console_stack point to first item */
static BList console_stack;
// Read only stack
static BList console_stack_hidden;

static
void my_concat(BList* head, BList* tail)
{
  if (head->Cdr()) {
    my_concat(head->Cdr(), tail);
  } else {
    head->PutCdr(tail);
  }
}

int Tol_EvalExpr (Tcl_Obj * obj_expr, int hidden, Tcl_Obj * obj_result)
{
  BList * tol_result;
  Tcl_DString dstr;
  char * expr;
  
  Tcl_DStringInit(&dstr);
  expr = Tcl_UtfToExternalDString(NULL,Tcl_GetString(obj_expr),-1,&dstr);
  tol_result = MultyEvaluate(expr);
  Tcl_DStringFree(&dstr);
  if(tol_result) {
    my_concat(hidden?&console_stack_hidden:&console_stack, tol_result);
  }
  /*  Tcl_AppendStringsToObj(obj_result,
      "couldn't evaluate tol expresion \"",
      Tcl_GetString(obj_expr), "\"", NULL);
      return TCL_ERROR;*/
  return TCL_OK;
}

int Tol_GetStructure( Tcl_Interp * interp, Tcl_Obj * name, Tcl_Obj * obj_result )
{
  Tcl_DString dstr;
  BStruct * structure;
  BStruct * substruct;

  Tcl_DStringInit( &dstr );
  Tcl_UtfToExternalDString( NULL, Tcl_GetString(name), -1, &dstr );
  if ( Tcl_DStringLength( &dstr ) &&
       (structure = FindStruct(Tcl_DStringValue(&dstr)))) {
    
    Tcl_Obj * tmp[2];
    Tcl_Obj * info[2];
    Tcl_Obj ** fields;
    BText btxt;
    int nfields;
    
    nfields = structure->Size();
    fields = (Tcl_Obj**)Tcl_Alloc( sizeof(Tcl_Obj*) * nfields );
    for ( int i = 0; i < nfields; i++ ) {
      BField & field = (*structure)[i];
      btxt = field.Name();
      Tcl_DStringFree(&dstr);
      Tcl_ExternalToUtfDString( NULL, btxt, -1, &dstr );
      info[0] = Tcl_NewStringObj(Tcl_DStringValue(&dstr), -1);
      Tcl_DStringFree( &dstr );
      if ( (substruct = field.Struct()) ) {
        btxt = substruct->Name();
        Tcl_ExternalToUtfDString( NULL, btxt, -1, &dstr );
        tmp[0] = Tcl_NewStringObj( "STRUCT", 6 );
        tmp[1] = Tcl_NewStringObj( Tcl_DStringValue(&dstr), -1);
        info[1] = Tcl_NewListObj( 2, tmp );
      } else if ( field.Grammar() ) {
        btxt = field.Grammar()->Name();
        Tcl_ExternalToUtfDString( NULL, btxt, -1, &dstr );
        info[1] = Tcl_NewStringObj(Tcl_DStringValue(&dstr), -1);
      }
      fields[i] = Tcl_NewListObj(2,info);
    }
    Tcl_SetListObj( obj_result, nfields, fields );
    Tcl_Free( (char*)fields );
  }
  return TCL_OK;
}

BSet* ContainerGetSet(const BSyntaxObject *container)
{
  if (container) {
    if (container->Grammar()==GraSet())
      return &(((BUserSet*)container)->Contens());
    else if (container->Grammar()==GraNameBlock())
      return &(((BUserNameBlock*)container)->Contens().Set());
  }
  return NULL;
}
  
/*
 * Return the path of a set if it is a file, trigger an error in other case
 *
 */

int Tol_GetSetPath( Tcl_Interp * interp, Tcl_Obj * name, Tcl_Obj * obj_result )
{
  Tcl_DString uniBuffer;
  const BSyntaxObject * syn;

 /* if name contains spaces the we should try it first as a string */
  Tcl_DStringInit(&uniBuffer);
  Tcl_UtfToExternalDString(NULL,Tcl_GetString(name),-1,&uniBuffer);
  BText fname(Tcl_DStringValue(&uniBuffer));
  syn = (BSyntaxObject*)BSetFromFile::FindCompiled(fname);
  Tcl_DStringFree(&uniBuffer);
  if (!syn) {
    syn = Tol_ResolveObject(interp, name, obj_result);
  }
  if ( !syn )
    return TCL_ERROR;
  BSet *ptrSet = ContainerGetSet(syn);
  if ( ptrSet->SubType() >= BSet::MODFile && ptrSet->SubType() <= BSet::BMIFile ) {
    Tcl_DString dstr;
    BText path( syn->TolPath() );

    Tcl_DStringInit( &dstr );
    Tcl_ExternalToUtfDString(NULL,path,-1,&dstr);
    Tcl_SetStringObj( obj_result, Tcl_DStringValue(&dstr), -1 );
    return TCL_OK;
  } else {
    Tcl_AppendStringsToObj( obj_result, Tcl_GetString(name),
                            " is not a valid file object", NULL );
    return TCL_ERROR;
  }
}

/*
 * Fill in obj_result the content of the given tol object's names. The
 * object are searched in the console's stack.
 *
 * Return:
 *
 *   {GRAMMAR NAME CONTENT PATH DESCRIPTION ISFILE [Has SubSet? SUBTYPE STRUCTURE]}
 */

int Tol_ListStack(Tcl_Interp * interp,int objc,Tcl_Obj *CONST objv[],
                  Tcl_Obj * obj_result)
{
  BSyntaxObject * so;
  BText btxt;
  Tcl_DString dstr;
  BList * tol_item;
  Tcl_Obj * robjv[9];
  int robjc;
  Tcl_Obj * tcl_item;
  int tcl_result;
  BSet * ptrSet = 0;
  int tmpCard;
  int j;
  
  Tcl_DStringInit(&dstr);
  
  tol_item = console_stack.Cdr();
  while (tol_item) {
    so = (BSyntaxObject*)Car(tol_item);
    
    /* GRAMMAR NAME */
    btxt = so->Grammar()->Name();
    Tcl_ExternalToUtfDString(NULL,btxt,-1,&dstr);
    robjv[0] = Tcl_NewStringObj(Tcl_DStringValue(&dstr),-1);
    Tcl_DStringFree(&dstr);
    
    /* OBJECT NAME */
//  btxt = so->Identify();
    GetName( so, btxt );
    Tcl_ExternalToUtfDString(NULL,btxt,-1,&dstr);
    robjv[1] = Tcl_NewStringObj(Tcl_DStringValue(&dstr),-1);
    Tcl_DStringFree(&dstr);
    
    /* OBJECT CONTENT */
    btxt = so->Info();
    Tcl_ExternalToUtfDString(NULL,btxt,-1,&dstr);
    robjv[2] = Tcl_NewStringObj(Tcl_DStringValue(&dstr),-1);
    Tcl_DStringFree(&dstr);
    
    /* OBJECT PATH */
    btxt = so->SourcePath();
    Tcl_ExternalToUtfDString(NULL,btxt,-1,&dstr);
    robjv[3] = Tcl_NewStringObj(Tcl_DStringValue(&dstr),-1);
    Tcl_DStringFree(&dstr);
    
    /* OBJECT DESCRIPTION */
    btxt = so->Description();
    Tcl_ExternalToUtfDString(NULL,btxt,-1,&dstr);
    robjv[4] = Tcl_NewStringObj(Tcl_DStringValue(&dstr),-1);
    Tcl_DStringFree(&dstr);
    
    /* IS THE OBJECT A FILE? */
    robjv[5] = Tcl_NewIntObj(so->IsFile());
////    if ( so->Grammar()==GraSet() ) {
    if ( so->Grammar()==GraSet() || so->Grammar()==GraNameBlock()) {
      /* HAS SUBSET */
////      ptrSet = &(((BUserSet*)so)->Contens());
      ptrSet = ContainerGetSet(so);
      tmpCard = ptrSet->Card();
      for (j=1; j<=tmpCard; ++j )
        if ( (*ptrSet)[j]->Grammar()==GraSet() )
          break;
      robjv[6] = Tcl_NewIntObj(j<=tmpCard);
        
      /* SUBTYPE INFO */
      robjv[7] = Tcl_NewIntObj( ptrSet->SubType() );
        
      /* STRUCT INFO */
      if ( ptrSet->Struct() ) {
        btxt = ptrSet->Struct()->Name();
        Tcl_ExternalToUtfDString(NULL,btxt,-1,&dstr);
        robjv[8] = Tcl_NewStringObj( Tcl_DStringValue(&dstr), -1 );
        Tcl_DStringFree( &dstr );
      } else
        robjv[8] = Tcl_NewStringObj( NULL, 0 );
      robjc = 9;
    } else
      robjc = 6;
    
    /* build the tcl item as a list */
    tcl_item = Tcl_NewListObj(robjc,robjv);
    
    /* append to the end of the result */
    tcl_result = Tcl_ListObjAppendElement(interp,obj_result,tcl_item);
    if (tcl_result != TCL_OK) {
      Tcl_SetStringObj(obj_result,"",-1);
      Tcl_AppendObjToObj(obj_result,Tcl_GetObjResult(interp));
      return TCL_ERROR;
    }
    tol_item = Cdr(tol_item);
  }
  return TCL_OK;
}

struct tcl_info_t
{
  Tcl_Interp *interp;
  int objc;
  Tcl_Obj* CONST* objv;
  Tcl_DString &dstr;
};

/*
 * Tol_ReleaseStack --
 *
 * Recursive version in order to release stack in reverse order
 *
 * Preconditions:
 *
 *   P != NULL
 */
static
int Tol_ReleaseStack(tcl_info_t &info, BList *P)
{
  int result;
  
  assert(P != NULL);

  if (P->Cdr()) {
    /* keep on looking for rest of items */
    result = Tol_ReleaseStack(info, P->Cdr());
    /* process this item */
    BList *current = P->Cdr();
    BSyntaxObject * so;
    int i;
    so = (BSyntaxObject*)(current->Car());
    if (info.objc) {
      const char* name = so->Name().String();
      for (i = 0; i<info.objc; ++i) {
        Tcl_UtfToExternalDString(NULL,Tcl_GetString(info.objv[i]),-1,
                                 &info.dstr);
        if (!strcmp(Tcl_DStringValue(&info.dstr), name)) {
          Tcl_DStringFree(&info.dstr);
          break;
        }
        Tcl_DStringFree(&info.dstr);
      }
    } else {
      /* mark current as being found */
      i = -1;
    }
    if (i<info.objc) {
      BList *next = current->Cdr();
      /* delete will DecNRefs to the Car */
      delete current;
      /* now try to release the BSyntaxObject */
      DESTROY(so);
      /* chain the list */
      P->PutCdr(next);
    }
  } else {
    /* EOR */
    result = TCL_OK;
  }
  return result;
}

int Tol_ReleaseStack(Tcl_Interp * interp, int objc, Tcl_Obj *CONST objv[],
                     Tcl_Obj * obj_result)
{
  Tcl_DString dstr;
  tcl_info_t tcl_info = {interp, objc, objv, dstr};
  Tcl_DStringInit(&dstr);

  return Tol_ReleaseStack(tcl_info, &console_stack);
}

/*!
 * Tol_GetConsoleObject --
 *
 *     Returns the object with given index in the console object list.
 */
BSyntaxObject * Tol_GetConsoleObject(int index )
{
  BList * current = console_stack.Cdr();
  int i = 1;
  while (current) {
    if (i==index) break;
    current = Cdr(current);
    ++i;
  }
  return current ? (BSyntaxObject*)(current->Car()) : NULL;
}


/*
 * return the container (File, Set or NameBlock) with name obj_name,
 * in case of error return NULL and leave a description in
 * obj_result.
 * 
 */
BSyntaxObject * Tol_FindGlobalContainer(const char* Type,
                                        const char* obj_name,
                                        Tcl_Obj*    obj_result)
{
  BGrammar *gra;
  BSyntaxObject* var;
  Tcl_DString uniBuffer;

  if (!strcmp(Type, "Set"))
    gra = GraSet();
  else if (!strcmp(Type, "NameBlock"))
    gra = GraNameBlock();
  else if (!strcmp(Type, "File"))
    gra = NULL;
  else {
    Tcl_AppendStringsToObj(obj_result,"type '",
                           Type,
                           "' is not a container grammar", NULL );
    return NULL;
  }
  Tcl_DStringInit(&uniBuffer);
  Tcl_UtfToExternalDString(NULL,obj_name,-1,&uniBuffer);
  if (!gra) {
    /* should look in Files */
    BText fname(Tcl_DStringValue(&uniBuffer));
    if (!(var=(BSyntaxObject*)BSetFromFile::FindCompiled(fname))) {
      Tcl_AppendStringsToObj(obj_result,"file \"",
                             obj_name,
                             "\" is not included", NULL );
    }
  } else if (!(var=gra->FINDVARIABLE(Tcl_DStringValue(&uniBuffer)))) {
      Tcl_AppendStringsToObj(obj_result,"\"",
                             obj_name,
                             "\" isn't a ", Type, " variable", NULL );
  }
  Tcl_DStringFree(&uniBuffer);
  return var;
}

/*
 * given a tol set, returns its child corresponding to the set of
 * indexes indexes of size n.  In case of error return NULL and leave
 * a description in obj_result.
 *
 */

BSyntaxObject * Tol_FindChild(Tcl_Interp    *interp,
                              BSyntaxObject *syn_obj,
                              Tcl_Obj       **indexes, int n,
                              Tcl_Obj       *obj_result)
{
  int tcl_code;
  Tcl_DString dstr;
  BSet *container;
  int idx, card;
  int i;

  for (i=0; i<n; ++i) {
    if (!(container = ContainerGetSet(syn_obj))) {
      BText info(syn_obj->Info());
      Tcl_DStringInit(&dstr);
      Tcl_ExternalToUtfDString(NULL,info,-1,&dstr);
      Tcl_AppendStringsToObj(obj_result,"object \"",
                             Tcl_DStringValue(&dstr),
                             "\" is not a container",
                             NULL);
      Tcl_DStringFree(&dstr);
      break;
    }
    /* get the current object index */
    tcl_code = Tcl_GetIntFromObj(interp,indexes[i],&idx);
    if (tcl_code != TCL_OK) {
      Tcl_AppendObjToObj( obj_result, Tcl_GetObjResult(interp));
      break;
    }
    card = container->Card();
    if (idx<1 || idx>card) {
      Tcl_AppendStringsToObj(obj_result,
                             "index '",
                             Tcl_GetString(indexes[i]),
                             "' out of range",
                             NULL);
      break;
    }
    /* take the next object in the list */
    syn_obj = (*container)[idx];
  }
  return i == n ? syn_obj : NULL;
}

/*!
 *  Tol_ResolveObject --
 *
 *     Resolve a SyntaxObject given a toltcl object reference. A
 *     reference is {TYPE ?container? i1 i2 ... in} or a global
 *     container's name of type File|Set|NameBlock|Console. When TYPE
 *     is Console then container is not given. The grammar of the
 *     object found is matched to the given argument grammar. If the
 *     return value is NULL an error message is left in interp.
 */

BSyntaxObject * Tol_ResolveObject(Tcl_Interp *interp,
                                  Tcl_Obj    *obj_ref,
                                  Tcl_Obj    *obj_result)
{
  Tcl_Obj ** items;
  int n;
  int tcl_code;
  char * type;

  /* look for subitem given in obj_ref */
  tcl_code = Tcl_ListObjGetElements(interp, obj_ref, &n, &items);
  if (tcl_code != TCL_OK) {
    Tcl_AppendObjToObj(obj_result,Tcl_GetObjResult(interp));
    return NULL;
  }

  // this Tcl_Obj is to leave error messages
  BSyntaxObject * syn = NULL;

  if (n >= 2) {
    type = Tcl_GetString(items[0]);
    if (!strcmp(type,"Console") || !strcmp(type,"File") ||
        !strcmp(type,"Set") || !strcmp(type,"NameBlock") ) {
      if (!strcmp(type,"Console")) {
        // is a reference in the console, items[1] is the first index in
        // the path, following indexes are indexes withing containers.
        int i1;
        if ((tcl_code = Tcl_GetIntFromObj(interp,items[1],&i1)!=TCL_OK)) {
          Tcl_AppendObjToObj(obj_result,Tcl_GetObjResult(interp));
          return NULL;
        }
        if (!(syn=Tol_GetConsoleObject(i1))) {
          Tcl_AppendStringsToObj(obj_result, "index ",
                                 Tcl_GetString(items[1]),
                                 " not found in console", NULL);
          return NULL;
        }
      } else {
      /* should be File, Set or NameBlock, it is a hierarchical container */
        if (!(syn=Tol_FindGlobalContainer(Tcl_GetString(items[0]),
                                          Tcl_GetString(items[1]),
                                          obj_result))) {
          return NULL;
        }
      }
      assert(syn);
      if (n>2) {
        // there are more indexes & syn should be a Container
        if (!(syn=Tol_FindChild(interp,
                                syn, items+2, n-2, obj_result))) {
          return NULL;
        }
      }
    } else {
      if ( n==2 ) {
        if ( !strcasecmp( type, "ADDRESS" ) ) {
          return
            BSyntaxObject::GetObjectFromAddress( Tcl_GetString( items[1] ) );
        } else {
          // look global var in grammar
          BGrammar * gra;
          gra = BGrammar::FindByName(type);
          if (!gra) {
            Tcl_AppendStringsToObj(obj_result, "\"",
                                   type,
                                   "\" isn't a grammar", NULL);
            return NULL;
          }
          Tcl_DString dstr;
          Tcl_DStringInit(&dstr);
          Tcl_UtfToExternalDString(NULL, Tcl_GetString(items[1]), -1, &dstr);
          if (!(syn = gra->FINDVARIABLE(Tcl_DStringValue(&dstr))))
            Tcl_AppendStringsToObj(obj_result, "variable '",
                                   Tcl_DStringValue( &dstr ),
                                   "' not found in grammar '",
                                   gra->Name().String(), "'", NULL);
          Tcl_DStringFree(&dstr);
          /* found and matched */
          return syn;
        }
      } else {
        Tcl_AppendStringsToObj(obj_result,
                               "invalid object reference in ResolveObject",
                               NULL);
      }
    }
  } else {
      Tcl_AppendStringsToObj(obj_result,
                             "invalid object reference in ResolveObject",
                             NULL);
  }
/*  if (grammar && syn && syn->Grammar()!=grammar) {
    Tcl_AppendStringsToObj(obj_result, "grammar for object '",
                           Tcl_GetString(obj_ref),
                           "' does not match grammar '",
                           grammar->Name().String(), "'", NULL);
    syn = NULL;
  }
*/
  return syn;
}

int Tol_FindSOInSet(BSet * ptrSet, const BSyntaxObject * syn,
                    ToltclPool & indexes)
{
  int j;
  BSyntaxObject * so;
  
  for (j = 1; j <= ptrSet->Card(); j++) {
    so = (*ptrSet)[j];
    BSet *ptrSet;
    if (so == syn || ((ptrSet=ContainerGetSet(so)) &&
                      Tol_FindSOInSet(ptrSet,
                                      syn, indexes))) {
      /* found!!! */
      indexes.AppendObject((void*)j);      
      return 1;
    }
  }

  return 0;
}
 
/*
 *  Puts in obj_result the global reference of the given
 *  syntaxobject. The syntaxobject could be given as set member or as
 *  global variable. In case of error leave in obj_result the message.
 *  Returns TCL_OK if succesfull or TCL_ERROR in case of error.
 */

int Tol_GetReference(Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[],
                     Tcl_Obj * obj_result)
{
  Tcl_Obj ** items;
  int n;
  int tcl_code;
  const BSyntaxObject * source, * syn;
  BSet * ptrSet;
  ToltclPool indexes;
  Tcl_DString dstr;
  int j;
  char * graname, * objname;

  assert(!Tcl_IsShared(obj_result));
  tcl_code = Tcl_ListObjGetElements(interp,objv[0],&n,&items);
  assert(tcl_code == TCL_OK);
  if (n<2) {
    Tcl_AppendStringsToObj(obj_result,
                           "wrong # args: should be 'tol::info",
                           " reference {grammar|container objname ?indexes?}'",
                           NULL);
    return TCL_ERROR;   
  }
  if (n==2 && strcmp(Tcl_GetString(items[0]),"Console")) {
  // global access
    BGrammar * gra;
    graname = Tcl_GetString(items[0]);
    gra = BGrammar::FindByName(graname);
    if (!gra) {
      Tcl_AppendStringsToObj( obj_result, "\"",
                              graname,
                              "\" isn't a grammar", NULL);
      return TCL_ERROR;
    }
    objname = Tcl_GetString(items[1]);

    Tcl_UtfToExternalDString(NULL,objname,-1,&dstr);
    syn = gra->FINDVARIABLE(Tcl_DStringValue(&dstr));
    Tcl_DStringFree(&dstr);
    if (!syn) {
      Tcl_AppendStringsToObj(obj_result, "\"",
                             Tcl_GetString(items[1]),
                             "\" isn't a variable in grammar ",
                             graname, NULL);
      return TCL_ERROR;
    }
    source = syn->Source();
    if (!source) {
      /* is a global variable not defined inside a file */
      items = (Tcl_Obj**)Tcl_Alloc(sizeof(Tcl_Obj*) * 2);
      Tcl_ExternalToUtfDString(NULL, graname, -1, &dstr);
      items[0] = Tcl_NewStringObj(Tcl_DStringValue(&dstr), -1);
      Tcl_DStringFree(&dstr);
      Tcl_ExternalToUtfDString(NULL, objname, -1, &dstr);
      items[1] = Tcl_NewStringObj(Tcl_DStringValue(&dstr), -1);
      Tcl_DStringFree(&dstr);
      Tcl_SetListObj(obj_result, 2, items);
      Tcl_Free((char*)items);
      return TCL_OK;
    }
  } else {
    // member access
    if (!(syn=Tol_ResolveObject(interp,objv[0],obj_result))) {
      return TCL_ERROR;
    }
    /* here we have a valid reference */
    tcl_code = Tcl_ListObjGetElements(interp,objv[0],&n,&items);
    assert(tcl_code == TCL_OK);
    if (!strcmp(Tcl_GetString(items[0]),"File") ||
        !strcmp(Tcl_GetString(items[0]),"Console")) {
      /* here we have in objv[0] the answer */
      Tcl_SetListObj(obj_result, n, items);
      return TCL_OK;      
    }
    source = syn->Source();
    if (!source) {
      /* here we have in objv[0] the answer too */
      Tcl_SetListObj(obj_result, n, items);
      return TCL_OK;
    }
  }
  /* at this point variable has to be defined inside a file */
  assert(source);
  ptrSet = &(((BUserSet*)source)->Contens());
  if (Tol_FindSOInSet(ptrSet, syn, indexes)) {
    items = (Tcl_Obj**)Tcl_Alloc(sizeof(Tcl_Obj*) * (indexes.GetSize()+2));
    Tcl_ExternalToUtfDString(NULL, "File", -1, &dstr);
    items[0] = Tcl_NewStringObj(Tcl_DStringValue(&dstr), -1);
    Tcl_DStringFree(&dstr);
    Tcl_ExternalToUtfDString(NULL, source->Name(), -1, &dstr);
    items[1] = Tcl_NewStringObj(Tcl_DStringValue(&dstr), -1);
    Tcl_DStringFree(&dstr);
    int last = indexes.GetLast();
    for(j = last; j >= 0; j--)
      items[last+2-j] = Tcl_NewIntObj(long(*indexes._GetObject(j)));
    Tcl_SetListObj(obj_result, indexes.GetSize()+2, items);
    Tcl_Free((char*)items);
    return TCL_OK;
  } else {
    /* this should not happend because syn should be inside syn->source */
    Tcl_AppendStringsToObj(obj_result,
                             "internal error: syn not found in syn->Source()",
                             NULL);
    return TCL_ERROR;
  }
}

inline void SAVE_SET_STRING( Tcl_Obj **obj, Tcl_DString* dstr )
{
  if (Tcl_IsShared( *obj ) ) {
    Tcl_DecrRefCount( *obj );
    *obj = Tcl_NewStringObj( Tcl_DStringValue( dstr ), -1 );
    Tcl_IncrRefCount( *obj );
  } else 
    Tcl_SetStringObj( *obj, Tcl_DStringValue( dstr ),-1 );
}

inline void SAVE_SET_STRING( Tcl_Obj **obj, const char* str )
{
  if (Tcl_IsShared( *obj ) ) {
    Tcl_DecrRefCount( *obj );
    *obj = Tcl_NewStringObj( str, -1 );
    Tcl_IncrRefCount( *obj );
  } else 
    Tcl_SetStringObj( *obj, str,-1 );
}

class ContainerIterator
{
public:

  static ContainerIterator *New( BSyntaxObject *obj );
  
  enum status_t { VALID, INVALID };

  virtual ~ContainerIterator( ) { }
  
  status_t GetStatus() const {
    return m_status;
  }
  
  virtual status_t Begin( ) = 0;
  virtual BSyntaxObject *Next( ) = 0;

protected:

  ContainerIterator() : m_status( INVALID ) { }
  
  status_t m_status;
};

class SetIterator : public ContainerIterator
{
public:
  SetIterator( BSet *set )
  {
    m_set = set;
    Begin();
  }

  virtual ~SetIterator( )
  {
  }
  
  virtual ContainerIterator::status_t Begin()
  {
    m_idx = 0;
    m_status = m_set ? VALID : INVALID;
    return m_status;
  }
  
  virtual BSyntaxObject *Next()
  {
    BSyntaxObject *so = _next();
    if ( !so ) {
      /* start over */
      Begin();
    }
    return so;
  }

protected:

  BSyntaxObject *_next()
  {
    if ( m_set ) {
      ++m_idx;
      return ( m_idx > m_set->Card( ) ) ? NULL : ( *m_set )[ m_idx ];
    }
    return NULL;
  }

  size_t m_idx;
  BSet *m_set;
};

class USetIterator : public SetIterator
{
public:
  USetIterator( BUserSet *uset )
    : SetIterator( &( uset->Contens( ) ) )
  {
  }
  virtual ~USetIterator() { }
};

class UNameBlockIterator : public SetIterator
{
public:
  UNameBlockIterator( BUserNameBlock *unb )
    : SetIterator( &( unb->Contens( ).Set( ) ) ),
      m_data_static( NULL ),
      m_methods_static( NULL ),
      m_methods_instance( NULL ),
      m_ptr_item( NULL )
  {
    const BClass *cls = unb->Contens( ).Class( );
    if ( cls ) {
      m_data_static = cls->SelectStaticMembers( NULL );
      m_methods_static = cls->SelectStaticMethods( NULL );
      m_methods_instance = cls->SelectNonStaticMethods( NULL );
    }
  }

  virtual ~UNameBlockIterator( )
  {
    DESTROY( m_data_static );
    DESTROY( m_methods_static );
    DESTROY( m_methods_instance );
  }
  
  virtual status_t Begin( )
  {
    SetIterator::Begin( );
    m_ptr_item = NULL;
    return GetStatus( );
  }
  
  virtual BSyntaxObject *Next()
  {
    BSyntaxObject *so;
    
    so = _next();
    
    if ( so ) {
      return so;
    }
    
    if ( m_ptr_item ) {
      m_ptr_item = Cdr( m_ptr_item );
    } else {
      m_ptr_item = m_methods_instance;
    }

    if ( m_ptr_item ) {
      return (BSyntaxObject*)Car( m_ptr_item );
    } else {
      // si despues de avanzar no encuentro 'obj', lo dejo listo para
      // que de la vuelta
      Begin( );
      return NULL;
    }
  }

private:
  BList *m_data_static;
  BList *m_methods_static;
  BList *m_methods_instance;
  BList *m_ptr_item;
};

ContainerIterator *ContainerIterator::New( BSyntaxObject *obj )
{
  if ( obj->Grammar( ) == GraSet( ) ) {
    return new USetIterator( (BUserSet*)obj );
  }
  if ( obj->Grammar( ) == GraNameBlock( ) ) {
    return new UNameBlockIterator( (BUserNameBlock*)obj );
  }
  return NULL;
}

/*! Implement a foreach proc similar to the one provided in Tcl except
 *  that instead of iterating over the list's items it iterates over
 *  the Set's items. The set could be tolset if the indexes is empty
 *  or tolset[i1][i2]...[ik] for the given indexes {i1,i2,...,ik}
 */
int Tol_ForEach (Tcl_Interp * interp,
                 int objc,
                 Tcl_Obj *CONST objv[],
                 Tcl_Obj * obj_result)
{
  BSyntaxObject* container;
  Tcl_DString dstr;
  int tcl_code = TCL_OK;
  int i;

  int length = 0;

  if ( Tcl_GetCharLength( objv[ 0 ] ) == 0 ) {
    Tcl_AppendStringsToObj( obj_result, "empty loop variable name", NULL );
    return TCL_ERROR;
  }
  
  if ( Tcl_ListObjLength( interp, objv[ 1 ], &length) != TCL_OK ) {
    Tcl_AppendObjToObj( obj_result, Tcl_GetObjResult( interp ) );
    return TCL_ERROR;
  }
  if ( length < 2 ) {
    Tcl_AppendStringsToObj( obj_result,
                            "invalid object reference '",
                            Tcl_GetString( objv[1] ),
                            "' must be {TYPE ?name? i1 i2 ... ik}",
                            NULL );
    return TCL_ERROR;
  }

  const int OBJ_GRAMMAR    = 0;
  const int OBJ_GRAMMARV   = OBJ_GRAMMAR + 1;
  const int OBJ_NAME       = OBJ_GRAMMARV + 1;
  const int OBJ_NAMEV      = OBJ_NAME + 1;
  const int OBJ_CONTENT    = OBJ_NAMEV + 1;
  const int OBJ_CONTENTV   = OBJ_CONTENT + 1;
  const int OBJ_PATH       = OBJ_CONTENTV + 1;
  const int OBJ_PATHV      = OBJ_PATH + 1;
  const int OBJ_DESC       = OBJ_PATHV + 1;
  const int OBJ_DESCV      = OBJ_DESC + 1;
  const int OBJ_ISFILE     = OBJ_DESCV + 1;
  const int OBJ_ISFILEV    = OBJ_ISFILE + 1;
  const int OBJ_HASSUBSET  = OBJ_ISFILEV + 1;
  const int OBJ_HASSUBSETV = OBJ_HASSUBSET + 1;
  const int OBJ_SUBTYPE    = OBJ_HASSUBSETV + 1;
  const int OBJ_SUBTYPEV   = OBJ_SUBTYPE + 1;
  const int OBJ_STRUCT     = OBJ_SUBTYPEV + 1;
  const int OBJ_STRUCTV    = OBJ_STRUCT + 1;
  const int NUM_OBJS      = OBJ_STRUCTV + 1;

  int datac;
  Tcl_Obj *datav[ NUM_OBJS ];

  
  if ( !( container = Tol_ResolveObject( interp, objv[ 1 ], obj_result ) ) ) {
    return TCL_ERROR;
  }
  ContainerIterator *citer = ContainerIterator::New( container );
  
  if ( !citer ) {
    Tcl_AppendStringsToObj(obj_result,
                           "object '",
                           Tcl_GetString( objv[ 1 ] ),
                           "' is not a valid container ",
                           NULL);
    return TCL_ERROR;
  }
  
  datav[ OBJ_GRAMMAR ]  = Tcl_NewStringObj( "grammar", -1 );
  datav[ OBJ_GRAMMARV ] = Tcl_NewObj( );
  datav[ OBJ_NAME ]     = Tcl_NewStringObj( "name", -1 );
  datav[ OBJ_NAMEV ]    = Tcl_NewObj( );
  datav[ OBJ_CONTENT ]  = Tcl_NewStringObj( "content", -1 );
  datav[ OBJ_CONTENTV ] = Tcl_NewObj( );
  datav[ OBJ_PATH ]     = Tcl_NewStringObj( "path", -1 );
  datav[ OBJ_PATHV ]    = Tcl_NewObj( );
  datav[ OBJ_DESC ]     = Tcl_NewStringObj( "description", -1 );
  datav[ OBJ_DESCV ]    = Tcl_NewObj( );
  datav[ OBJ_ISFILE ]     = Tcl_NewStringObj( "isfile", -1 );
  datav[ OBJ_ISFILEV ]    = Tcl_NewObj( );
  datav[ OBJ_HASSUBSET ]  = Tcl_NewStringObj( "hassubset", -1 );
  datav[ OBJ_HASSUBSETV ] = Tcl_NewObj( );
  datav[ OBJ_SUBTYPE ]    = Tcl_NewStringObj( "subtype", -1 );
  datav[ OBJ_SUBTYPEV ]   = Tcl_NewObj( );
  datav[ OBJ_STRUCT ]     = Tcl_NewObj( );
  datav[ OBJ_STRUCTV ]    = Tcl_NewObj( );

  // the just created objects have refcount = 0
  for ( i = 0; i < NUM_OBJS; ++i ) {
    Tcl_IncrRefCount( datav[ i ] );
  }
  
  BSyntaxObject *syn_i;
  BSet          *set_i; /* just in case syn_i be a container */

  /* now iter over its children */
  
  Tcl_DStringInit( &dstr );
  BText btxt;
 
  for ( i = 1; ( syn_i = citer->Next( ) ); ++i ) {
    /* read the grammar */
    
    btxt = syn_i->Grammar( )->Name( );
    Tcl_ExternalToUtfDString( NULL, btxt, -1, &dstr );
    SAVE_SET_STRING( datav + OBJ_GRAMMARV, &dstr ); 
    Tcl_DStringFree(&dstr);
    
    /* read the name */
    //btxt = syn_i->Identify();
    GetName( syn_i, btxt );
    Tcl_ExternalToUtfDString(NULL,btxt,-1,&dstr);
    SAVE_SET_STRING( datav + OBJ_NAMEV, &dstr ); 
    Tcl_DStringFree(&dstr);
    
    /* read the content */
    btxt = syn_i->Info();
    Tcl_ExternalToUtfDString(NULL,btxt,-1,&dstr);
    SAVE_SET_STRING( datav + OBJ_CONTENTV, &dstr ); 
    Tcl_DStringFree(&dstr);
    
    /* read the path */
    btxt = syn_i->SourcePath();
    Tcl_ExternalToUtfDString(NULL, btxt, -1,& dstr);
    SAVE_SET_STRING( datav + OBJ_PATHV, &dstr ); 
    Tcl_DStringFree(&dstr);
    
    /* read the description */   
    btxt = syn_i->Description();
    Tcl_ExternalToUtfDString(NULL,btxt,-1,&dstr);
    SAVE_SET_STRING( datav + OBJ_DESCV, &dstr ); 
    Tcl_DStringFree(&dstr);

    // Este if es para incluir en los items que son Set informacion
    // que solo ellos llevan como: Subtype, IsFile, etc ...

    if ( ( set_i = ContainerGetSet( syn_i ) ) ) {
      if ( Tcl_IsShared( datav[ OBJ_ISFILEV ] ) ) {
        Tcl_DecrRefCount( datav[ OBJ_ISFILEV ] );
#ifdef ISFILE_IMPLEMENTED
        datav[ OBJ_ISFILEV ] = Tcl_NewIntObj( syn_i->IsFile( ) );
#else
        datav[OBJ_ISFILEV] = Tcl_NewIntObj( 0 );
#endif
        Tcl_IncrRefCount( datav[ OBJ_ISFILEV ] );
      } else
#ifdef ISFILE_IMPLEMENTED
        Tcl_SetIntObj( datav[ OBJ_ISFILEV ], syn_i->IsFile( ) );
#else
      Tcl_SetIntObj( datav[ OBJ_ISFILEV ], 0 );
#endif
      /* verify if has subset */
      int tmpCard = set_i->Card( );
      int j;
      for ( j = 1; j <= tmpCard; ++j )
        if ( ContainerGetSet( ( *set_i )[ j ] ) )
          break;
      if ( Tcl_IsShared( datav[ OBJ_HASSUBSETV ] ) ) {
        Tcl_DecrRefCount( datav[ OBJ_HASSUBSETV ] );
        datav[ OBJ_HASSUBSETV ] = Tcl_NewIntObj( j <= tmpCard );
        Tcl_IncrRefCount( datav[ OBJ_HASSUBSETV ] );
      } else
        Tcl_SetIntObj( datav[ OBJ_HASSUBSETV ], j <= tmpCard );
        
      /* subtype info */
      if ( Tcl_IsShared( datav[ OBJ_SUBTYPEV ] ) ) {
        Tcl_DecrRefCount( datav[ OBJ_SUBTYPEV ] );
        datav[ OBJ_SUBTYPEV ] = Tcl_NewIntObj( set_i->SubType( ) );
        Tcl_IncrRefCount( datav[ OBJ_SUBTYPEV ] );
      } else
        Tcl_SetIntObj( datav[ OBJ_SUBTYPEV ], set_i->SubType( ) );
        
      /* STRUCT OR CLASS INFO */
      // asume que dstr esta a longitud 0
      if ( syn_i->Grammar() == GraNameBlock() ) {
        SAVE_SET_STRING( datav + OBJ_STRUCT, "class" );
        const BNameBlock& nb = ((BUserNameBlock*)(syn_i))->Contens();
        const BClass* cls = nb.Class( );
        if ( cls ) {
          btxt = cls->FullName();
          Tcl_ExternalToUtfDString( NULL, btxt, -1, &dstr );
        }
      } else {
        SAVE_SET_STRING( datav + OBJ_STRUCT, "struct" );
        if ( set_i->Struct( ) ) {
          btxt = set_i->Struct( )->Name( );
          Tcl_ExternalToUtfDString( NULL, btxt, -1, &dstr );
        }
      }
      SAVE_SET_STRING( datav + OBJ_STRUCTV, &dstr ); 
      Tcl_DStringFree( &dstr );
      datac = NUM_OBJS;
    } else
      datac = OBJ_DESCV + 1;
    // set the loop variable
    Tcl_Obj *varValuePtr = Tcl_ObjSetVar2( interp, objv[ 0 ], NULL,
                                           Tcl_NewListObj( datac, datav ),
                                           TCL_LEAVE_ERR_MSG );
    if (varValuePtr == NULL) {
      Tcl_AppendObjToObj( obj_result, Tcl_GetObjResult( interp ) );
      Tcl_AppendStringsToObj( obj_result,
                              "\n    (setting foreach loop variable \"",
                              Tcl_GetString( objv[ 0 ] ), "\")",
                              NULL );
      tcl_code = TCL_ERROR;
      break;
    }
    tcl_code = Tcl_EvalObjEx( interp, objv[ 2 ], 0 );
    // unset loop variable
    Tcl_UnsetVar( interp, Tcl_GetString( objv[ 0 ] ), 0 );
    if ( tcl_code != TCL_OK) {
      if ( tcl_code == TCL_CONTINUE) {
        tcl_code = TCL_OK;
      } else if ( tcl_code == TCL_BREAK) {
        tcl_code = TCL_OK;
        break;
      } else if ( tcl_code == TCL_ERROR) {
        Tcl_AppendObjToObj( obj_result, Tcl_GetObjResult( interp ) );
        break;
      } else {
        break;
      }
    }
  }

  delete citer;
  
  /* release tcl objects holds on datav */
  for ( i = 0; i < NUM_OBJS; ++i ) {
    Tcl_DecrRefCount( datav[ i ] );
  }
  return tcl_code;
}


/*
 * Iterate over a first level's children of a given set.  The set
 * could be a container Set, File or NameBlock if the index list is
 * empty or container[i1][i2]...[ik] for the given indexes
 * {i1,i2,...,ik}
 *
 * Used by tol::forallchil
 *
 */

int Tol_IterChildren(Tcl_Interp * interp,
                     int objc,
                     Tcl_Obj *CONST objv[],
                     Tcl_Obj * obj_result)
{
  BSyntaxObject* container;
  Tcl_DString dstr;
  Tcl_Obj * ArgIndexes;
  int tcl_code;
  int i;
  int n, index_length;
  Tcl_Obj ** items;
  Tcl_Obj ** script_header;

  int length = 0;
  
  if (Tcl_ListObjLength(interp,objv[0],&length)!=TCL_OK) {
    Tcl_AppendObjToObj(obj_result,Tcl_GetObjResult(interp));
    return TCL_ERROR;
  }
  if ( length < 2 ) {
    Tcl_AppendStringsToObj( obj_result,
                            "invalid object reference '",
                            Tcl_GetString(objv[0]),
                            "must be {TYPE ?name? i1 i2 ... ik}",
                            NULL );
    return TCL_ERROR;
  }

  /* expand header of script */
  tcl_code = Tcl_ListObjGetElements( interp, objv[ 1 ],
                                     &length, &script_header );
  if ( tcl_code != TCL_OK ) {
    Tcl_AppendObjToObj( obj_result, Tcl_GetObjResult( interp ) );
    return TCL_ERROR;
  }

  if ( !length ) {
    Tcl_AppendStringsToObj( obj_result,
                            "invalid script argument of length 0",
                            NULL );
    return TCL_ERROR;
  }
  int ARG_SCRIPT    = length - 1;
  int ARG_GRAMMAR   = ARG_SCRIPT + 1;
  int ARG_NAME      = ARG_GRAMMAR + 1;
  int ARG_CONTENT   = ARG_NAME + 1;
  int ARG_PATH      = ARG_CONTENT + 1;
  int ARG_DESC      = ARG_PATH + 1;
  int ARG_INDEXES   =  ARG_DESC + 1;
  int ARG_ISFILE    = ARG_INDEXES + 1;
  int ARG_HASSUBSET = ARG_ISFILE + 1;
  int ARG_SUBTYPE   = ARG_HASSUBSET + 1;
  int ARG_STRUCT    = ARG_SUBTYPE + 1;
  int NUM_ARGS      = ARG_STRUCT + 1;
  
  if ( !( container=Tol_ResolveObject( interp, objv[0], obj_result ) ) ) {
    return TCL_ERROR;
  }
  ContainerIterator *citer = ContainerIterator::New( container );
  
  if ( !citer ) {
    Tcl_AppendStringsToObj(obj_result,
                           "object '",
                           Tcl_GetString(objv[0]),
                           "' is not a valid container ",
                           NULL);
      return TCL_ERROR;
  }
  
  int datac;
  Tcl_Obj ** datav = new Tcl_Obj*[ NUM_ARGS ];

  // is ok to ask for a list
  Tcl_ListObjGetElements( interp, objv[ 0 ], &n, &items );
  
  if (strcmp(Tcl_GetString(items[0]),"Console")) {
    if (n>2)
      ArgIndexes = Tcl_NewListObj(n-2,items+2);
    else
      ArgIndexes = Tcl_NewListObj(0,NULL);
  } else {
    if (n>1)
      ArgIndexes = Tcl_NewListObj(n-1,items+1);
    else
      ArgIndexes = Tcl_NewListObj(0,NULL);
  }

  for( i = 0; i < ARG_GRAMMAR; ++i ) {
    datav[ i ] = script_header[ i ];
  }
  
  datav[ARG_GRAMMAR] = Tcl_NewObj();
  datav[ARG_NAME]    = Tcl_NewObj();
  datav[ARG_CONTENT] = Tcl_NewObj();
  datav[ARG_PATH]    = Tcl_NewObj();
  datav[ARG_DESC]    = Tcl_NewObj();
  Tcl_Obj * last_index = Tcl_NewIntObj(1);
  Tcl_ListObjAppendElement(NULL,ArgIndexes,last_index);
  datav[ARG_INDEXES] = ArgIndexes;
  Tcl_ListObjLength(NULL,datav[ARG_INDEXES],&index_length);
  datav[ARG_ISFILE] = Tcl_NewObj();
  datav[ARG_HASSUBSET] = Tcl_NewObj();
  datav[ARG_SUBTYPE] = Tcl_NewObj();
  datav[ARG_STRUCT] = Tcl_NewObj();
  for ( i = 0; i < NUM_ARGS; ++i ) {
    Tcl_IncrRefCount( datav[i] );
  }
  
  BSyntaxObject *syn_i;
  BSet          *set_i; /* just in case syn_i be a container */
  /* now iter over its children */
  
  Tcl_DStringInit(&dstr);
  BText btxt;
 
  for ( i = 1; ( syn_i = citer->Next( ) ); ++i ) {
    
    /* read the grammar */
    btxt = syn_i->Grammar()->Name();
    Tcl_ExternalToUtfDString(NULL,btxt,-1,&dstr);
    if (Tcl_IsShared(datav[ARG_GRAMMAR])) {
      Tcl_DecrRefCount(datav[ARG_GRAMMAR]);
      datav[ARG_GRAMMAR] = Tcl_NewStringObj(Tcl_DStringValue(&dstr),-1);
      Tcl_IncrRefCount(datav[ARG_GRAMMAR]);
    } else 
      Tcl_SetStringObj(datav[ARG_GRAMMAR], Tcl_DStringValue(&dstr),-1);
    Tcl_DStringFree(&dstr);
    
    /* read the name */
    //btxt = syn_i->Identify();
    GetName( syn_i, btxt );
    Tcl_ExternalToUtfDString(NULL,btxt,-1,&dstr);
    if (Tcl_IsShared(datav[ARG_NAME])) {
      Tcl_DecrRefCount(datav[ARG_NAME]);
      datav[ARG_NAME] = Tcl_NewStringObj(Tcl_DStringValue(&dstr),-1);
      Tcl_IncrRefCount(datav[ARG_NAME]);
    } else 
      Tcl_SetStringObj(datav[ARG_NAME], Tcl_DStringValue(&dstr),-1);
    Tcl_DStringFree(&dstr);
    
    /* read the content */
    btxt = syn_i->Info();
    Tcl_ExternalToUtfDString(NULL,btxt,-1,&dstr);
    if (Tcl_IsShared(datav[ARG_CONTENT])) {
      Tcl_DecrRefCount(datav[ARG_CONTENT]);
      datav[ARG_CONTENT] = Tcl_NewStringObj(Tcl_DStringValue(&dstr),-1);
      Tcl_IncrRefCount(datav[ARG_CONTENT]);
    } else 
      Tcl_SetStringObj(datav[ARG_CONTENT],Tcl_DStringValue(&dstr),-1);
    Tcl_DStringFree(&dstr);
    
    /* read the path */
    btxt = syn_i->SourcePath();
    Tcl_ExternalToUtfDString(NULL,btxt,-1,&dstr);
    if (Tcl_IsShared(datav[ARG_PATH])) {
      Tcl_DecrRefCount(datav[ARG_PATH]);
      datav[ARG_PATH] = Tcl_NewStringObj(Tcl_DStringValue(&dstr),-1);
      Tcl_IncrRefCount(datav[ARG_PATH]);
    } else 
      Tcl_SetStringObj(datav[ARG_PATH],Tcl_DStringValue(&dstr),-1);
    Tcl_DStringFree(&dstr);
    
    /* read the description */   
    btxt = syn_i->Description();
    Tcl_ExternalToUtfDString(NULL,btxt,-1,&dstr);
    if (Tcl_IsShared(datav[ARG_DESC])) {
      Tcl_DecrRefCount(datav[ARG_DESC]);
      datav[ARG_DESC] = Tcl_NewStringObj(Tcl_DStringValue(&dstr),-1);
      Tcl_IncrRefCount(datav[ARG_DESC]);
    } else 
      Tcl_SetStringObj(datav[ARG_DESC],Tcl_DStringValue(&dstr),-1);
    Tcl_DStringFree(&dstr);
    
    if ((set_i=ContainerGetSet(syn_i))) {
      /* update last index */
      if (Tcl_IsShared(last_index)) {
        last_index = Tcl_NewIntObj(i);
        Tcl_ListObjReplace(NULL, datav[ARG_INDEXES], index_length-1,
                           1, 1, &last_index);
      } else {
        /* set the last value index */
        Tcl_SetIntObj( last_index, i );
      }
      /* to refresh the string */
      Tcl_InvalidateStringRep( datav[ ARG_INDEXES ] );
      if ( Tcl_IsShared( datav[ ARG_ISFILE ] ) ) {
        Tcl_DecrRefCount( datav[ ARG_ISFILE ] );
#ifdef ISFILE_IMPLEMENTED
        datav[ ARG_ISFILE ] = Tcl_NewIntObj( syn_i->IsFile( ) );
#else
        datav[ARG_ISFILE] = Tcl_NewIntObj( 0 );
#endif
        Tcl_IncrRefCount( datav[ ARG_ISFILE ] );
      } else
#ifdef ISFILE_IMPLEMENTED
        Tcl_SetIntObj( datav[ ARG_ISFILE ], syn_i->IsFile( ) );
#else
      Tcl_SetIntObj( datav[ ARG_ISFILE ], 0 );
#endif
      /* verify if has subset */
      int tmpCard = set_i->Card( );
      int j;
      for (j=1; j<=tmpCard; ++j )
        if ( ContainerGetSet( ( *set_i )[ j ] ) )
          break;
      if ( Tcl_IsShared( datav[ ARG_HASSUBSET ] ) ) {
        Tcl_DecrRefCount( datav[ ARG_HASSUBSET ] );
        datav[ ARG_HASSUBSET ] = Tcl_NewIntObj( j <= tmpCard );
        Tcl_IncrRefCount( datav[ ARG_HASSUBSET ] );
      } else
        Tcl_SetIntObj( datav[ ARG_HASSUBSET ], j <= tmpCard );
        
      /* subtype info */
      if ( Tcl_IsShared( datav[ ARG_SUBTYPE ] ) ) {
        Tcl_DecrRefCount( datav[ ARG_SUBTYPE ] );
        datav[ ARG_SUBTYPE ] = Tcl_NewIntObj( set_i->SubType( ) );
        Tcl_IncrRefCount( datav[ ARG_SUBTYPE ] );
      } else
        Tcl_SetIntObj( datav[ ARG_SUBTYPE ],set_i->SubType( ) );
        
      /* STRUCT INFO */
      if ( set_i->Struct( ) ) {
        btxt = set_i->Struct( )->Name( );
        Tcl_ExternalToUtfDString( NULL, btxt, -1, &dstr );
      }
      if ( Tcl_IsShared( datav[ ARG_STRUCT ] ) ) {
        Tcl_DecrRefCount( datav[ ARG_STRUCT ] );
        datav[ ARG_STRUCT ] = Tcl_NewStringObj( Tcl_DStringValue( &dstr ),-1 );
        Tcl_IncrRefCount( datav[ ARG_STRUCT ] );
      } else 
        Tcl_SetStringObj( datav[ ARG_STRUCT ], Tcl_DStringValue( &dstr ),-1 );
      Tcl_DStringFree( &dstr );
      datac = NUM_ARGS;
    } else
      datac = ARG_INDEXES;
    tcl_code = Tcl_EvalObjv( interp, datac, datav, TCL_EVAL_GLOBAL );
    if ( tcl_code == TCL_BREAK ) {
      tcl_code = TCL_OK;
      break;
    }
    if ( tcl_code == TCL_ERROR ) {
      Tcl_AppendObjToObj( obj_result, Tcl_GetObjResult( interp ) );
      break;
    }
  }
  
  /* liberar los objetos tcl */
  /* OJO aqui tenia ARG_GRAMMAR en lugar de 0 */
  for ( i = 0; i < NUM_ARGS; ++i ) {
    Tcl_DecrRefCount( datav[ i ] );
  }

  delete citer;
  
  delete []datav;
  return tcl_code;
}

/*
 * Fill in obj_result the content of the matrix variable.
 *
 */

int Tol_GetMatrixContent(Tcl_Interp * interp,
                         Tcl_Obj * obj_name,
                         Tcl_Obj * obj_result)
{
  //BGrammar * gra = NULL;
  const BSyntaxObject *tol_obj = NULL;
   
  if (!(tol_obj=Tol_ResolveObject(interp, obj_name, obj_result))) {
    return TCL_ERROR;
  }

  BMatrix<double> vmat;
  BMatrix<double> &theMat = vmat;

  if (tol_obj->Grammar()==GraVMatrix()) {
    BVMat &V = VMat((BSyntaxObject *)tol_obj);
    V.GetDMat(vmat);
  } else if (tol_obj->Grammar()==GraMatrix()) {
    theMat = ((DMat&)Mat((BSyntaxObject *)tol_obj));
  } else {  
    Tcl_AppendStringsToObj( obj_result, Tcl_GetString(obj_name),
                            " is not a valid Matrix|VMatrix object", NULL );    
    return TCL_ERROR;
  }
    
#define IT_NAME 0
#define IT_ROWS 1
#define IT_COLS 2
#define IT_DATA 3
#define IT_SIZE 4
     
  Tcl_Obj * items[4];
  Tcl_Obj ** subitems;
  int r, Rows, c, Cols;
  // BDat & dat = BDat::Unknown();
  
  //BMatrix<BDat> & mat = (BMatrix<BDat>&)(((BUserMat*)tol_obj)->Contens());
  
  //items[IT_NAME] = Tcl_NewStringObj(tol_obj->Identify(),-1);
  BText tmp;
  GetName( tol_obj, tmp );
  items[IT_NAME] = Tcl_NewStringObj(tmp.Buffer(),-1);
  Rows = theMat.Rows();
  Cols = theMat.Columns();
  items[IT_ROWS] = Tcl_NewIntObj(Rows);
  items[IT_COLS] = Tcl_NewIntObj(Cols);
  subitems = (Tcl_Obj**)Tcl_Alloc( sizeof(Tcl_Obj*)*Rows*Cols );
  for ( r = 0; r < Rows; ++r )
    for ( c = 0; c < Cols; ++c ) {
      BDat dat = theMat(r,c);
      if (dat.IsKnown())
        subitems[r*Cols+c] = Tcl_NewDoubleObj(dat.Value());
      else
        subitems[r*Cols+c] = Tcl_NewStringObj("?",-1);
    }
  items[IT_DATA] = Tcl_NewListObj( Rows*Cols, subitems );
  Tcl_SetListObj( obj_result,IT_SIZE, items );
  Tcl_Free( (char*)subitems );
  return TCL_OK;
}

/*
 * Fill in obj_result the content of the serie variable.
 *
 */

int Tol_GetSerieContent(Tcl_Interp * interp,
                        int objc,
                        Tcl_Obj *CONST objv[],
                        Tcl_Obj * obj_result)
{
  const BSyntaxObject* var = Tol_ResolveObject(interp,
                                               objv[0],
                                               obj_result/*,
                                               GraSerie()*/);
  if (!var) {
    return TCL_ERROR;
  }

  // parse dates arguments
  
  BDate I0, I1;
  int tcl_code;

  BUserTimeSerie * serie = (BUserTimeSerie*)var;
  serie->ReadData();

  if (objc == 1) {
    I0 = serie->FirstDate();
    I1 = serie->LastDate();
  } else {
    tcl_code = Tol_ParseDate(interp,Tcl_GetString(objv[1]),I0);
    if (tcl_code != TCL_OK) {
      Tcl_AppendObjToObj(obj_result,Tcl_GetObjResult(interp));
      return TCL_ERROR;
    }
    if (objc == 3) {
      tcl_code = Tol_ParseDate(interp,Tcl_GetString(objv[2]),I1);
      if (tcl_code != TCL_OK) {
        Tcl_AppendObjToObj(obj_result,Tcl_GetObjResult(interp));
        return TCL_ERROR;
      }
    }
  }
 
  if ( !I0.HasValue() ) 
    I0 = BDate::DefaultFirst();
  if ( !I1.HasValue() ) 
    I1 = BDate::DefaultLast();

  BUserTimeSet * tms;
  Tcl_Obj ** obj_array;
  int length;

  char buffer[1024];

  tms = serie->Dating();

  if ( !tms ) {
    Tcl_AppendStringsToObj(obj_result,"Serie \"",
                           Tcl_GetString(objv[0]),
                           "\" does not have dating", NULL);
    return TCL_ERROR;
  }

  // ajustamos el intervalo de fechas al fechado

  I0 = tms->FirstNoLess(I0);
  I1 = tms->FirstNoGreat(I1);
  length = tms->Difference(I0,I1)+1;
  if ( length <= 0 ) {
    Tcl_SetStringObj(obj_result,
                     "last date must be greater or equal than first",-1);
    return TCL_ERROR;
  }

  BDat  value;
  BText tmp;
  Tcl_Obj * subitems[2];

  // ++ because we identify the TimeSet as the first element

  ++length;
  obj_array = (Tcl_Obj**)ckalloc(length*sizeof(Tcl_Obj*));

  //tmp = tms->Identify();
  GetName(tms, tmp);
  obj_array[0] = Tcl_NewStringObj(tmp,-1);
  for ( int i = 1; i < length; i++ ) {
    tmp = I0.GetText();
    subitems[0] = Tcl_NewStringObj(tmp,-1);
    value = (*serie)[I0];
    if ( value.IsKnown() )
      subitems[1] = Tcl_NewDoubleObj(value.Value());
    else
      subitems[1] = Tcl_NewStringObj("?",-1);
    obj_array[i] = Tcl_NewListObj(2,subitems);
    I0 += tms;

    sprintf(buffer,"%d",i);
    Tcl_VarEval(interp, "puts ", buffer, NULL);
  }
  Tcl_SetListObj(obj_result,length,obj_array);
  Tcl_Free( (char*)obj_array );
  return TCL_OK;
}

int Tol_ParseDate(Tcl_Interp * interp, char * what, BDate & date)
{
  int    year, month, day, hour, min;
  double sec;
  
  int tcl_code;
  Tcl_Obj * tcl_result;
  int objc;
  Tcl_Obj ** objv;

  month = day = 1;
  hour  = min = 0;
  sec   = 0.0;
  char re_pat[] = "{^(?:y([0-9]+)(?:m([0-9]+))?(?:d([0-9]+))?)$}";

  tcl_code = Tcl_VarEval(interp, "regexp -inline ", re_pat, " ",what, NULL);
  if ( tcl_code != TCL_OK )
    return TCL_ERROR;
  tcl_result = Tcl_DuplicateObj(Tcl_GetObjResult(interp)); 
  /* this should be a valid list, unless Tcl be corrupt */
  Tcl_ListObjGetElements(interp,tcl_result,&objc,&objv);
  if ( objc == 0 ) {
    Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
                           "invalid date: \"",what,"\"",NULL);
    Tcl_DecrRefCount(tcl_result);
    return TCL_ERROR;
  }

  /* and objc must be 4 */

  Tcl_GetIntFromObj(interp,objv[1],&year);
  Tcl_GetIntFromObj(interp,objv[2],&month);
  Tcl_GetIntFromObj(interp,objv[3],&day);

  /* now is save to release tcl_result */

  Tcl_DecrRefCount(tcl_result);

  date.PutDate(year,month,day);
  if ( !date.HasValue() ) {
    Tcl_ResetResult(interp);
    char buffer[1024];
    sprintf(buffer,"y%dm%dd%d",year,month,day);
    tcl_result = Tcl_GetObjResult(interp);
    Tcl_AppendStringsToObj(tcl_result,
                           what," = ",buffer," is valid but unknown",NULL);
    return TCL_ERROR;
  }
  return TCL_OK;
}

/*
 * Set the language to be used  by TOL. Fill in obj_result the previous
 * language.
 *
 */

int Tol_SetLanguage(Tcl_Interp * interp, Tcl_Obj * lang, Tcl_Obj * obj_result)
{
  BBool curLang = BText::Language();
  BIdiomEnum nextLang;
 
  char * strLang = Tcl_GetString( lang );
  if ( !strcasecmp( strLang, "es" ) )
    nextLang = BSPANISH;
  else {
    /* anything else will be assumed as english */
    nextLang = BENGLISH;
  }
  /* set the previous language as result */
  if ( curLang == BSPANISH )
    Tcl_SetStringObj( obj_result, "es", -1 );
  else
    Tcl_SetStringObj( obj_result, "en", -1 );
  /* tell TOL what language to use from now on */
  BText::PutLanguage( nextLang );
  return TCL_OK;
}

/*
 * Return the language used  by TOL. Fill in obj_result the current
 * language.
 *
 */

int Tol_GetLanguage(Tcl_Interp * interp, Tcl_Obj * obj_result)
{
  BBool curLang = BText::Language();
  
  if ( curLang == BSPANISH )
    Tcl_SetStringObj( obj_result, "es", -1 );
  else
    Tcl_SetStringObj( obj_result, "en", -1 );
  return TCL_OK;
}

/*
 * Fill in obj_result the version info corresponding to tol
 *
 *   {major MajorNum minor MinorNum release ReleaseNum coment Comment}
 *
 */

int Tol_InfoVersion( Tcl_Interp * interp,  Tcl_Obj * obj_result )
{
#define VERSION_INFO_SIZE 3*2
 
  Tcl_Obj * items[VERSION_INFO_SIZE];
  char buffer[64];

  /* Major Info */
  items[0] = Tcl_NewStringObj( "major", -1 );
  items[1] = Tcl_NewIntObj( VERSION_MAJOR );
  /* Minor Info */
  items[2] = Tcl_NewStringObj( "minor", -1 );
  items[3] = Tcl_NewIntObj( VERSION_MINOR );
  /* Comment Info */
  items[4] = Tcl_NewStringObj( "comment", -1 );
  items[5] = Tcl_NewStringObj(TOLVersionBuild(), -1 );
  /* asign the items to the result list */
  Tcl_SetListObj( obj_result, VERSION_INFO_SIZE, items ); 
  return TCL_OK;
}

/*
 * Fill in obj_result the list of files included in TOL
 *
 */


int Tol_InfoIncluded (Tcl_Interp * interp,Tcl_Obj * obj_result)
{
  BList* lst = BSetFromFile::Compiled();

  BText txt(LstText(lst,"","",","));
  return BList2TclList(interp,lst,obj_result,&GetPath,&HasNoSource);
}

/* OJO con la declaracion de tmpSet */

int Tol_InfoFile(Tcl_Interp * interp, Tcl_Obj * file,
                 Tcl_Obj * obj_result)
{
  Tcl_DString dstr;
  const BSyntaxObject * so;

  Tcl_DStringInit(&dstr);
  Tcl_UtfToExternalDString(NULL,Tcl_GetString(file),-1,&dstr);
  
  BText fname(Tcl_DStringValue(&dstr));
  so = (const BSyntaxObject*)BSetFromFile::FindCompiled(fname);
  Tcl_DStringFree(&dstr);
  if (!so) {
    Tcl_AppendStringsToObj(obj_result,"file \"",
                           Tcl_GetString(file),
                           "\" isn't included", NULL );
    return TCL_ERROR;
  }
  Tcl_Obj * info[6];
  /* adicionar la informacion del subtype y si tiene algun set
   * como descendiente
   */
  BText soInfo(so->Info());
  BText soPath(so->SourcePath());
  BText soDesc(so->Description());

  char * pch = soInfo;
  if (pch) pch = skipWhite(pch);
  else pch = (char*)"";

  Tcl_ExternalToUtfDString(NULL,pch,-1,&dstr);
  info[0] = Tcl_NewStringObj(Tcl_DStringValue(&dstr), -1);
  Tcl_DStringFree(&dstr);

  Tcl_ExternalToUtfDString(NULL,soPath,-1,&dstr);
  info[1] = Tcl_NewStringObj(Tcl_DStringValue(&dstr), -1);
  Tcl_DStringFree(&dstr);

  Tcl_ExternalToUtfDString(NULL,soDesc,-1,&dstr);
  info[2] = Tcl_NewStringObj(Tcl_DStringValue(&dstr), -1);
  Tcl_DStringFree(&dstr);

  /* HAS SUBSET */
  BSet * ptrSet = &(((BUserSet*)so)->Contens());
  int tmpCard = ptrSet->Card();
  int j;
  for (j=1; j<=tmpCard; ++j )
    if (ContainerGetSet((*ptrSet)[j]))
      break;
  info[3] = Tcl_NewIntObj(j<=tmpCard);
    
  /* SUBTYPE INFO */
  info[4] = Tcl_NewIntObj( ptrSet->SubType() );
  /* STRUCTURE */
  info[5] = Tcl_NewStringObj( NULL, 0 );
  Tcl_SetListObj(obj_result, 6, info);
  return TCL_OK;
}

int Tol_CheckSyntax(Tcl_Interp * interp,
                    Tcl_Obj    * obj_expr,
                    Tcl_Obj    * obj_result)
{
  Tcl_DString dstr;
  BText tol_expr;

  Tcl_DStringInit(&dstr);
  tol_expr = Tcl_UtfToExternalDString( NULL, Tcl_GetString( obj_expr ),
                                       -1, &dstr );
  Tcl_DStringFree(&dstr);
  BText result = CheckSyntax( tol_expr );
  Tcl_SetStringObj( obj_result, result.String(), -1 );
  return TCL_OK;
}

/*
 * Fill in obj_result the result of evaluating including the file
 * given as argument: the absolute path.
 *
 */

int Tol_IncludeFile(Tcl_Interp * interp,Tcl_Obj * obj_file,Tcl_Obj * obj_result)
{
  Tcl_DString dstr;
  BText fName;

  Tcl_DStringInit(&dstr);
  fName = Tcl_UtfToExternalDString(NULL,Tcl_GetString(obj_file),-1,&dstr);
  BSetFromFile* uSet = (BSetFromFile*)BSetFromFile::FindCompiled(fName);
  Tcl_DStringFree(&dstr);

  if(uSet) {
    DESTROY(uSet);
  }
  IncludeFile(fName);
  return TCL_OK;
}

int Tol_DecompileFile( Tcl_Interp * interp,
                       Tcl_Obj * obj_file,
                       Tcl_Obj * obj_result )
{
  Tcl_DString dstr;
  BText fName;

  Tcl_DStringInit(&dstr);
  fName = Tcl_UtfToExternalDString(NULL,Tcl_GetString(obj_file),-1,&dstr);
  BSetFromFile* uSet = (BSetFromFile*)BSetFromFile::FindCompiled(fName);
  Tcl_DStringFree(&dstr);

  if(uSet) {
    DESTROY(uSet);
  } else {
    Tcl_AppendStringsToObj( obj_result, "file '",
                            Tcl_GetString(obj_file),
                            "' is not compiled", NULL );
    return TCL_ERROR;
  }
  if ( uSet ) {
    Tcl_AppendStringsToObj( obj_result, "could not decompile file '",
                            Tcl_GetString(obj_file), "'", NULL );
    return TCL_ERROR;
  }
  return TCL_OK;
}

/*
 *
 * Fill in obj_result the list of grammars defined in TOL
 *
 */
int Tol_SetGrammarsObj(Tcl_Interp * interp, Tcl_Obj * obj_result )
{

  BList* lstGra = BGrammar::Instances();

  if (BList2TclList(interp,lstGra,obj_result,&GetName,&ExcludeAnything)==TCL_OK) {
    Tcl_Obj * name = Tcl_NewStringObj("Anything", -1);
    if (Tcl_ListObjAppendElement(interp,obj_result,name) != TCL_OK) {
      Tcl_AppendObjToObj(obj_result,Tcl_GetObjResult(interp));
      return TCL_ERROR;
    }
    if (QuickSort(interp,obj_result) != TCL_OK) {
      Tcl_AppendObjToObj(obj_result,Tcl_GetObjResult(interp));
      return TCL_ERROR;
    }
    return TCL_OK;
  }
  Tcl_AppendObjToObj(obj_result,Tcl_GetObjResult(interp));
  return TCL_ERROR;
}

/*
 *
 * Fill in obj_result the description of gra_name.
 *
 */

int Tol_SetGrammarDescObj(Tcl_Interp * interp, Tcl_Obj * gra_name,
                          Tcl_Obj * obj_result )
{
  BGrammar * gra = BGrammar::FindByName(Tcl_GetString(gra_name));

  if (gra) {
    BText desc(gra->Description());
    Tcl_SetStringObj(obj_result, desc, -1);
    return TCL_OK;
  }
  Tcl_AppendStringsToObj( obj_result, "\"",
                          Tcl_GetString(gra_name),
                          "\" isn't a grammar", NULL );
  return TCL_ERROR;
}

/*
 *
 * Fill in obj_result the list of packages defined in TOL
 *
 */
int Tol_SetPackagesObj(Tcl_Interp * interp, Tcl_Obj * obj_result )
{

  BList* lstGra = BPackage::Required();

  BList2TclList( interp, lstGra, obj_result, &GetName );
  Tcl_AppendObjToObj( obj_result, Tcl_GetObjResult( interp ) );
  return TCL_OK;
}

/*
 *
 * Fill in obj_result the description of package.
 *
 */
int Tol_SetPackageDescObj( Tcl_Interp *interp, Tcl_Obj *pkgName,
                           Tcl_Obj *obj_result )
{
  int status;
  Tcl_Obj *graName = Tcl_NewStringObj( "NameBlock", -1 );
  
  status = Tol_SetVariableInfoObj( graName, pkgName, obj_result );
  Tcl_DecrRefCount( graName );
  return status;
}

/*
 *  Tol_FillFunctionInfo --
 *
 *    Used in Tol_SetFunctionsObj & Tol_SetFunctionInfoObj to return the info
 *    for the function requested.
 */

static
int Tol_FillFunctionInfo(BOperator * opr, Tcl_Obj * obj_result)
{
  Tcl_Obj * info[3];
  Tcl_DString dstr_info;
  Tcl_DString dstr;

  Tcl_DStringInit(&dstr_info);
  BText args(opr->Arguments());
  
  if(args.Last()!='}') // name doesn't comes within the arguments expression
  {   
      // grammar name
      Tcl_DStringAppend(&dstr_info, opr->Grammar()->Name(), -1);
      Tcl_DStringAppend(&dstr_info, " ", -1);
      // function name
      Tcl_DStringInit(&dstr);
      // antes estaba FullName
      Tcl_ExternalToUtfDString(NULL, opr->FullName(), -1, &dstr); 
      Tcl_DStringAppend(&dstr_info, Tcl_DStringValue(&dstr), -1);
      Tcl_DStringFree(&dstr);
  }

  Tcl_ExternalToUtfDString(NULL,args.String(),-1,&dstr);
  Tcl_DStringAppend(&dstr_info, Tcl_DStringValue(&dstr), -1);
  Tcl_DStringFree(&dstr);
  info[0] = Tcl_NewStringObj(Tcl_DStringValue(&dstr_info), -1);
  Tcl_DStringFree(&dstr_info);
  Tcl_ExternalToUtfDString(NULL,opr->SourcePath(),-1,&dstr);
  info[1] = Tcl_NewStringObj(Tcl_DStringValue(&dstr), -1);
  Tcl_DStringFree(&dstr);
  Tcl_ExternalToUtfDString(NULL,opr->Description(),-1,&dstr);
  info[2] = Tcl_NewStringObj(Tcl_DStringValue(&dstr), -1);
  Tcl_DStringFree(&dstr);
  Tcl_SetListObj(obj_result, 3, info);
  return TCL_OK;
}

/*
 *
 * Fill in obj_result the functions defined for grammar gra_name.  If gra_name
 * is a list it is considered as an object reference {type ?name? i1 ... ik}
 *
 */

int Tol_SetFunctionsObj (Tcl_Interp * interp, Tcl_Obj * gra_name,
                         Tcl_Obj * obj_result)
{
  int length = 0;
  
  if (Tcl_ListObjLength(interp,gra_name,&length)!=TCL_OK) {
    Tcl_AppendObjToObj(obj_result,Tcl_GetObjResult(interp));
    return TCL_ERROR;
  }
  if (length>1) {
    const BSyntaxObject *syn;
    if (!(syn=Tol_ResolveObject(interp, gra_name, obj_result))) {
      return TCL_ERROR;
    }
    
    if (syn->Grammar() != GraCode()) {
      Tcl_AppendStringsToObj(obj_result, "'", Tcl_GetString(gra_name),
                             "' is not a function object", NULL);
      return TCL_ERROR;
    }
    BOperator * opr =  ((BGraContens<BCode>*)syn)->Contens().Operator();
    return Tol_FillFunctionInfo(opr, obj_result);
  }
  /* gra_name should be a grammar name */
  if (!strcmp(Tcl_GetString(gra_name), "Anything")) {
    const BSpFunHash& spf = BSpecialFunction::Instances();
    BSpFunHash::const_iterator iter;
    for(iter=spf.begin(); iter!=spf.end(); iter++)
    {
      Tcl_ListObjAppendElement(interp, obj_result,
                               Tcl_NewStringObj(iter->second->Name(), -1));
    }
    if (QuickSort(interp,obj_result) != TCL_OK) {
      Tcl_AppendObjToObj(obj_result,Tcl_GetObjResult(interp));
      return TCL_ERROR;
    }
    return TCL_OK;
  }

  BGrammar * gra = BGrammar::FindByName(Tcl_GetString(gra_name));
  
  if (gra) {
    BList * lstOper = gra->GetOperators();
    if (BList2TclList(interp,lstOper,obj_result,&GetFullName) != TCL_OK) {
      Tcl_AppendObjToObj(obj_result,Tcl_GetObjResult(interp));
      DESTROY(lstOper);
      return TCL_ERROR;
    }
    DESTROY(lstOper);
    if (QuickSort(interp,obj_result) != TCL_OK) {
      Tcl_AppendObjToObj(obj_result,Tcl_GetObjResult(interp));
      return TCL_ERROR;
    }
    return TCL_OK;
  }

  Tcl_AppendStringsToObj(obj_result, "'",
                         Tcl_GetString(gra_name),
                         "' isn't a grammar", NULL);
  return TCL_ERROR;
}

static
BOperator* TT_FindOperator( const BGrammar *G, const char *expr )
{
  BOperator* opr = G->FindOperator( expr );
  if ( opr ) {
    return opr;
  }
  bool oldEnabled = BOut::Disable();
  bool stopFlag = BGrammar::StopFlag();
  BGrammar::Turn_StopFlag_Off();
  BSyntaxObject* obj = GraCode( )->BGrammar::LeftEvaluateExpr( expr );
  if ( stopFlag ) {
    BGrammar::Turn_StopFlag_On();
  } else {
    BGrammar::Turn_StopFlag_Off();
  }
  if( oldEnabled ) { BOut::Enable( ); }
  if(obj)
  {
    if( obj->Mode( ) == BUSERFUNMODE )
    {
      opr = dynamic_cast<BOperator*>( obj );
    }    
    if( obj->Mode( ) == BOBJECTMODE )
    {
      BUserCode *uc = dynamic_cast<BUserCode*>( obj );
      opr = uc ? uc->Contens().Operator( ) : NULL;
      if( opr && ( opr->Grammar( ) != G ) ) { opr = NULL; }
    }
  }
  return( opr );
}

/*
 * Fill in obj_result the function's prototype and description
 * for a given function in a given grammar.
 *
 */

int Tol_SetFunctionInfoObj (Tcl_Obj * gra_name,
                            Tcl_Obj * fun_name,
                            Tcl_Obj * obj_result)
{
  Tcl_DString dstr;
  Tcl_Obj * info[3];

  if (!strcmp(Tcl_GetString(gra_name), "Anything")) {
    Tcl_DStringInit(&dstr);
    Tcl_UtfToExternalDString(NULL,Tcl_GetString(fun_name),-1,&dstr);
    const BSpecialFunction * spf = BSpecialFunction::Get(Tcl_DStringValue(&dstr));
    Tcl_DStringFree(&dstr);
    if (spf) {
      char * name, * args;
      size_t len;
      
      name = ((BText&)spf->Name()).Buffer();
      args = ((BText&)spf->Arguments()).Buffer();
      len = strlen(args);
      if(!len || args[len-1]!='}') {
        info[0] = Tcl_NewStringObj("Anything ", -1);
        Tcl_AppendStringsToObj(info[0],name,args,NULL);
      } else {
        info[0] = Tcl_NewStringObj("", -1);;
        Tcl_AppendStringsToObj(info[0],args,NULL);
      }
      info[1] = Tcl_NewStringObj("",-1);
      Tcl_ExternalToUtfDString(NULL,spf->Description(),-1,&dstr);
      info[2] = Tcl_NewStringObj(Tcl_DStringValue(&dstr), -1);
      Tcl_DStringFree(&dstr);
      Tcl_SetListObj(obj_result, 3, info);
      return TCL_OK;
    }
    Tcl_AppendStringsToObj( obj_result, "\"",
                            Tcl_GetString(fun_name),
                            "\" isn't a function in grammar Anything", NULL );
  } else {
    BGrammar * gra = BGrammar::FindByName(Tcl_GetString(gra_name));
  
    if (gra) {
      Tcl_DStringInit(&dstr);
      Tcl_UtfToExternalDString( NULL, Tcl_GetString( fun_name ), -1, &dstr );
      BOperator* opr = TT_FindOperator( gra, Tcl_DStringValue( &dstr ) );
      Tcl_DStringFree(&dstr);
      if (opr) {
        return Tol_FillFunctionInfo(opr, obj_result);
      }
      // release the previous use of dstr
      //Tcl_DStringFree(&dstr);
      Tcl_AppendStringsToObj( obj_result, "\"",
                              Tcl_GetString(fun_name),
                              "\" isn't a function in grammar ",
                              Tcl_GetString(gra_name), NULL );
    } else
      Tcl_AppendStringsToObj( obj_result, "\"",
                              Tcl_GetString(gra_name),
                              "\" isn't a grammar", NULL );
  }
  return TCL_ERROR;
}

/* ojo info debe tener espacio para 9 Tcl_Obj como maximo */
/* retorna cuantos Tcl_Obj creo */

int SynObj2TclObj( const BSyntaxObject * var, Tcl_Obj * info[] )
{
  Tcl_DString dstr;
  int infoc;

  Tcl_DStringInit(&dstr);

  /* GRAMMAR */
#ifdef ISFILE_IMPLEMENTED
  info[ 0 ] = Tcl_NewStringObj(var->IsFile( ) ? "File" :
                               var->Grammar( )->Name( ).String( ), -1 );
#else
  info[ 0 ] = Tcl_NewStringObj( var->Grammar( )->Name( ).String( ), -1 );
#endif
    
  /* NAME */
  BText synname;
  
  GetName(var, synname);
  Tcl_ExternalToUtfDString(NULL,synname,-1,&dstr);
  info[1] = Tcl_NewStringObj(Tcl_DStringValue(&dstr), -1);
  Tcl_DStringFree(&dstr);
    
  /* REST OF FIELDS */
  
  BText varInfo(var->Info());
  BText varPath(var->SourcePath());
  BText varDesc(var->Description());
  
  /* OBJECT CONTENT */
  char * pch = varInfo;
  
  if (pch) pch = skipWhite(pch);
  else pch = (char*)"";
  
  Tcl_ExternalToUtfDString(NULL,pch,-1,&dstr);
  info[2] = Tcl_NewStringObj(Tcl_DStringValue(&dstr), -1);
  Tcl_DStringFree(&dstr);
  
  /* OBJECT PATH */
  Tcl_ExternalToUtfDString(NULL,varPath,-1,&dstr);
  info[3] = Tcl_NewStringObj(Tcl_DStringValue(&dstr), -1);
  Tcl_DStringFree(&dstr);
  
  /* OBJECT DESCRIPTION */
  Tcl_ExternalToUtfDString(NULL,varDesc,-1,&dstr);
  info[4] = Tcl_NewStringObj(Tcl_DStringValue(&dstr), -1);
  Tcl_DStringFree(&dstr);
  
#ifdef ISFILE_IMPLEMENTED
  info[5] = Tcl_NewIntObj(var->IsFile());
#else
  info[5] = Tcl_NewIntObj(0);
#endif
  //info[6] = Tcl_NewIntObj(var->System());
  BSet *ptrSet;
  if ((ptrSet=ContainerGetSet(var))) {
    /* HAS SUBSET */
    int tmpCard = ptrSet->Card();
    int j;
    for (j=1; j<=tmpCard; ++j )
      if ( (*ptrSet)[j]->Grammar()==GraSet() )
        break;
    info[6] = Tcl_NewIntObj(j<=tmpCard);
      
    /* SUBTYPE */
    info[7] = Tcl_NewIntObj( ptrSet->SubType() );
      
    /* STRUCTURE */
    if ( var->Grammar() == GraNameBlock() ) {
      const BNameBlock& nb = ((BUserNameBlock*)(var))->Contens();
      const BClass* cls = nb.Class( );
      if ( cls ) {
        info[8] = Tcl_NewStringObj( cls->FullName().String(), -1 );
      } else {
        info[8] = Tcl_NewStringObj( NULL, 0 );
      }
    } else if ( ptrSet->Struct() ) {
      BText btxt( ptrSet->Struct()->Name() );
      Tcl_ExternalToUtfDString(NULL,btxt,-1,&dstr);
      info[8] = Tcl_NewStringObj( Tcl_DStringValue(&dstr), -1 );
      Tcl_DStringFree( &dstr );
    } else {
      info[8] = Tcl_NewStringObj( NULL, 0 );
    }
    infoc = 9;
  } else
    infoc = 6;
  
  return infoc;
}

int Tol_SetVariableInfoObj (Tcl_Obj * gra_name,
                            Tcl_Obj * var_name,
                            Tcl_Obj * obj_result);

/*!
 * Fill in obj_result the variables defined for grammar gra_name.
 * Or the element info if gra_name is a reference of an element 
 * of a global container.
 */
int Tol_SetVariablesObj (Tcl_Interp *interp, Tcl_Obj *obj_reference,
                         Tcl_Obj *obj_result)
{
  const BSyntaxObject *syn ;
  
  int length = 0;
  Tcl_Obj ** items;
  int tcl_code;
  
  if ( Tcl_ListObjLength( interp, obj_reference, &length ) != TCL_OK ) {
    Tcl_AppendObjToObj( obj_result, Tcl_GetObjResult( interp ) );
    return TCL_ERROR;
  }
  if ( length > 1 ) {
    /*
    if (length == 2) {
      tcl_code = Tcl_ListObjGetElements(interp,obj_reference,&length,&items);
      assert(tcl_code == TCL_OK);
      if (strcmp(Tcl_GetString(items[0]),"Console"))
        return Tol_SetVariableInfoObj(items[0], items[1], obj_result);
    }
    */
    if ( !( syn = Tol_ResolveObject( interp, obj_reference, obj_result ) ) ) {
      return TCL_ERROR;
    }
//    Tcl_DString dstr;
    Tcl_Obj * info[9];
    int infoc;
    
    infoc = SynObj2TclObj(syn, info);
    Tcl_SetListObj(obj_result,infoc,info);
    return TCL_OK;
  }
  BGrammar *gra = BGrammar::FindByName(Tcl_GetString( obj_reference ) );
  if (!gra) {
    Tcl_AppendStringsToObj( obj_result, "'",
                            Tcl_GetString( obj_reference ),
                            "' isn't a grammar", NULL );
    return TCL_ERROR;
  }
  BList * lstVar = gra->GetVariables();
  if (BList2TclList(interp,lstVar,obj_result,&GetIdentify) != TCL_OK) {
    Tcl_AppendObjToObj(obj_result,Tcl_GetObjResult(interp));
    DESTROY(lstVar);
    return TCL_ERROR;
  }
  DESTROY(lstVar);
  if (QuickSort(interp,obj_result) != TCL_OK) {
    Tcl_AppendObjToObj(obj_result,Tcl_GetObjResult(interp));
    return TCL_ERROR;
  }
  return TCL_OK;
}

/*
 * Fill in obj_result the variables's description for a given variable 
 * in a given grammar.
 *
 */

int Tol_SetVariableInfoObj (Tcl_Obj * gra_name,
                            Tcl_Obj * var_name,
                            Tcl_Obj * obj_result)
{
  BGrammar * gra = BGrammar::FindByName(Tcl_GetString(gra_name));
  Tcl_DString dstr;
  
  Tcl_DStringInit(&dstr);
  if (gra) {
    Tcl_UtfToExternalDString(NULL,Tcl_GetString(var_name),-1,&dstr);
    const BSyntaxObject* var = gra->FINDVARIABLE(Tcl_DStringValue(&dstr));
    Tcl_DStringFree(&dstr);

    if (var) {
      Tcl_Obj * info[9];
      int infoc;
      infoc = SynObj2TclObj( var, info );
      Tcl_SetListObj(obj_result,infoc,info);
//#define __INFO_PRINT_NREFS__
#ifdef __INFO_PRINT_NREFS__
      printf("NREF = %d\n", var->NRefs());
#endif
      return TCL_OK;
    }
    Tcl_AppendStringsToObj( obj_result, "\"",
                            Tcl_GetString(var_name),
                            "\" isn't a variable in grammar ",
                            Tcl_GetString(gra_name), NULL );
  } else
    Tcl_AppendStringsToObj( obj_result, "\"",
                            Tcl_GetString(gra_name),
                            "\" isn't a grammar", NULL );
  return TCL_ERROR;
}

/*
 * Fill in obj_result the string representation of the
 * address of the object referenced in obj_ref.
 */
int Tol_GetAddressFromObject( Tcl_Interp * interp,
                             Tcl_Obj * obj_ref,
                             Tcl_Obj * obj_result)
{
  const BSyntaxObject *syn ;

#ifndef _NDEBUG
  //#define _PRINT_ADDR_OBJREF_
#endif

#ifdef _PRINT_ADDR_OBJREF_
  printf( "obj_ref = %s\n", Tcl_GetString( obj_ref ) );
#endif

  if ( !( syn = Tol_ResolveObject( interp, obj_ref, obj_result ) ) ) {
    return TCL_ERROR;
  }
  BText addr = syn->GetAddressFromObject( );
  Tcl_SetStringObj( obj_result, addr.Buffer( ), -1 );
  return TCL_OK;
}
                            
/*
 * Fill in obj_result the specific type for an Anything object, could
 * be: Struct, Class or Anything.
 */
int Tol_GetAnythingType( Tcl_Interp * interp,
                         Tcl_Obj * obj_ref,
                         Tcl_Obj * obj_result)
{
  const BSyntaxObject *syn ;

#ifndef _NDEBUG
  //#define _PRINT_ANYTHING_OBJREF_
#endif

#ifdef _PRINT_ANYTHING_OBJREF_
  printf( "obj_ref = %s\n", Tcl_GetString( obj_ref ) );
#endif

  if ( !( syn = Tol_ResolveObject( interp, obj_ref, obj_result ) ) ) {
    return TCL_ERROR;
  }
  
  if ( syn->Mode() == BCLASSMODE ) {
    Tcl_SetStringObj( obj_result, "Class", -1 );
  } else if ( syn->Mode() == BSTRUCTMODE ) {
    Tcl_SetStringObj( obj_result, "Struct", -1 );
  } else {
    Tcl_SetStringObj( obj_result, "Anything", -1 );
  }
  return TCL_OK;
}
                            
/*
 * We must be sure that the strings use 7 bit ASCII chararters.
 * Otherwise we must take care of the Utf representation.
 *
 */

static
int StrObjCompare(const void * O1, const void * O2)
{
  char * str1 = (*(Tcl_Obj**)O1)->bytes;
  char * str2 = (*(Tcl_Obj**)O2)->bytes;
  int check1, check2;

  check1 = isalpha(str1[0]);
  check2 = isalpha(str2[0]);

  if ( check1 && !check2 )
    return 1;
  if ( check2 && !check1 )
    return -1;
  return strcmp(str1,str2);
}

static
int QuickSort( Tcl_Interp * interp, Tcl_Obj * list )
{
  Tcl_Obj ** obj_array;
  int length;

  if (Tcl_ListObjGetElements(interp, list, &length, &obj_array) != TCL_OK) {
    return TCL_ERROR;
  }
  qsort((void*)obj_array, length, sizeof(Tcl_Obj*), &StrObjCompare);
  return TCL_OK;
}

static
void Tol_HciWriter( const BText & str )
{
  Tcl_CmdInfo cmd_info;

  if (TT_interp && Tcl_GetCommandInfo(TT_interp,"Tol_HciWriter",&cmd_info) ) {
    Tcl_DString dstr;
    Tcl_Obj * objv[2];
    
    Tcl_DStringInit(&dstr);
    Tcl_IncrRefCount(objv[0]=Tcl_NewStringObj("Tol_HciWriter",-1));
    Tcl_ExternalToUtfDString(NULL, ((BText&)str).Buffer(), -1, &dstr);
    Tcl_IncrRefCount(objv[1]=Tcl_NewStringObj(Tcl_DStringValue(&dstr), Tcl_DStringLength(&dstr)));
    Tcl_DStringFree(&dstr);
  
    int status = Tcl_EvalObjv(TT_interp, 2, objv, TCL_EVAL_GLOBAL);
    if (status != TCL_OK) {
      printf("message: %s\n", ((BText&)str).Buffer());
      printf("objv[1] : %s\n", Tcl_GetString(objv[1]));
      printf("%s\n", Tcl_GetStringResult(TT_interp));
    }
    /* release the objects */
    Tcl_DecrRefCount(objv[0]);
    Tcl_DecrRefCount(objv[1]);
  }
}

void Tol_InstallHciWriter()
{
  BOut::PutHciWriter(Tol_HciWriter);
  BOut::PutLogHciWriter(Tol_HciWriter);
}

static 
void Tol_SerieChart(BList * series, const BText& FileName )
{
#define CMD_SERIECHART "Tol_SerieChartMethod"
#define GRP_NAME "__grptmp_chart__%d"

  Tcl_CmdInfo cmd_info;
  static int id = 0;

  if (TT_interp && Tcl_GetCommandInfo(TT_interp,CMD_SERIECHART,&cmd_info) ) {
    Tcl_DString dstr;
    Tcl_Obj * objv[3];
    Tcl_Obj * obj_result=Tcl_NewObj();
    int tcl_result;
    char grpname[1024];
    
    Tcl_IncrRefCount(obj_result);

    // first create the group of series
    sprintf(grpname, GRP_NAME, ++id);
    tcl_result = Tol_CreateSerieGrp(TT_interp, grpname, series, obj_result);
    if (tcl_result==TCL_ERROR) {
      printf("%s -- error in Tol_CreateSerieGrp: %s\n", CMD_SERIECHART,
             Tcl_GetString(obj_result));
      Tcl_DecrRefCount(obj_result);
      return;
    }
    // release the obj_result
    Tcl_DecrRefCount(obj_result);    
    // chart command
    Tcl_IncrRefCount(objv[0]=Tcl_NewStringObj(CMD_SERIECHART,-1));
    // serie group argument
    Tcl_IncrRefCount(objv[1]=Tcl_NewStringObj(grpname,-1));    
    // file name argument
    Tcl_DStringInit(&dstr);
    Tcl_ExternalToUtfDString(NULL, ((BText&)FileName).Buffer(), -1, &dstr);
    Tcl_IncrRefCount(objv[2]=Tcl_NewStringObj(Tcl_DStringValue(&dstr), Tcl_DStringLength(&dstr)));
    Tcl_DStringFree(&dstr);
    int status = Tcl_EvalObjv(TT_interp, 3, objv, TCL_EVAL_GLOBAL);
    if (status != TCL_OK) {
      printf("%s -- error in Tcl_EvalObjv:\n", CMD_SERIECHART);
      printf("%s\n", Tcl_GetStringResult(TT_interp));
      printf("objv[1] : %s\n", Tcl_GetString(objv[1]));
      printf("objv[2] : %s\n", Tcl_GetString(objv[2]));
    }
    /* release the objects */
    for (int i=0; i<3; i++) 
      Tcl_DecrRefCount(objv[i]);
    /* the group of series should be destroyied in the Hook */
    /*Tcl_VarEval(TT_interp, "tol::seriegrp destroy ", grpname, NULL);*/
  }
}

int Tol_Tcl_Eval(char * script, const char ** result)
{
  int status;
  
  status = Tcl_Eval(TT_interp, script);
  *result = Tcl_GetStringResult(TT_interp);
  return status==TCL_OK;
}

Tcl_Obj *TolObj2TclObj( BSyntaxObject *tolObj )
{
  const char *grammar = tolObj->Grammar( )->Name( ).String( );

  if ( !strcmp( grammar, "Text" ) ) {
    const BText &value = Text( tolObj );
    return Tcl_NewStringObj( value.String( ),-1 );
  } else if ( !strcmp( grammar, "Real" ) ) {
    const BDat &value = Dat( tolObj );
    return Tcl_NewDoubleObj( value.Value( ) );
  } else if ( !strcmp( grammar, "Set" ) ) {
    // a Tol Set maps to a Tcl list 
    const BSet &setObj = ( ( BUserSet* )tolObj )->Contens( );
    int card = setObj.Card( );
    Tcl_Obj **objv = ( Tcl_Obj** )Tcl_Alloc( sizeof( Tcl_Obj* ) * card );
    for( int i = 1; i <= card; i++ ) {
      objv[ i - 1 ] = TolObj2TclObj( setObj[ i ] );
    }
    Tcl_Obj *listObj = Tcl_NewListObj( card, objv );
    Tcl_Free( ( char* )objv );
    return listObj;
  } else {
    // other types are not treated
    return Tcl_NewStringObj( tolObj->Dump( ).String( ),-1 );    
  }
}

int Tol_Tcl_EvalEx( const BSet &Args, const char ** result )
{
  int status;
  Tcl_Obj **objv;
  int card = Args.Card( );
  
  if ( !Args.Card( ) ) {
    *result = "";
    status = TCL_OK;
  } else {
    objv = ( Tcl_Obj** )Tcl_Alloc( sizeof( Tcl_Obj* ) * card );
    for( int i=1; i<=card; i++ ) {
      objv[ i-1 ] = TolObj2TclObj( Args[i] );
      Tcl_IncrRefCount( objv[ i - 1 ] );
    }
    status = Tcl_EvalObjv( TT_interp, card, objv, TCL_EVAL_GLOBAL );
    *result = Tcl_GetStringResult( TT_interp );
    for( int i = 0; i < card; i++ ) {
      Tcl_DecrRefCount(objv[i]);
    }
  }
  return status==TCL_OK;
}

int Tol_StopEvaluation()
{
  StopFlagOn();
  return TCL_OK;
}

/*
 * Fill in obj_result the format .
 *
 */

int Tol_LCFormat(Tcl_Interp*    interp,
                 Tcl_Obj *CONST obj_value,
                 Tcl_Obj *      obj_result)
{
  double value;
  char buffer[256];
  
  /* read the double value from tcl obj */
  if (Tcl_GetDoubleFromObj(TT_interp, obj_value, &value)==TCL_ERROR)
    {
      Tcl_AppendObjToObj(obj_result,Tcl_GetObjResult(interp));
      return TCL_ERROR;
    }
  lc_format(value, buffer);
  Tcl_AppendStringsToObj(obj_result, buffer, NULL);
  return TCL_OK;
}

void Tol_InstallMethodsHook()
{
  InstallSerieChartHook(&Tol_SerieChart);
  InstallTclEval(&Tol_Tcl_Eval);
  InstallTclEvalEx(&Tol_Tcl_EvalEx);
}