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/*                     University of Edinburgh, UK                       */
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/*************************************************************************/
/*                   Author :  Alan W Black                              */
/*                   Date   :  May 1998                                  */
/*-----------------------------------------------------------------------*/
/*  Content part of a linguistic item, normall only referenced from      */
/*  EST_Item                                                        */
/*                                                                       */
/*=======================================================================*/

#include <stdlib.h>
#include <stdio.h>
#include <fstream.h>
#include "ling_class/EST_Item_Content.h"
#include "ling_class/EST_Item.h"
#include "EST_error.h"

void EST_Item_Content::copy(const EST_Item_Content &x)
{
    f = x.f;
    // don't copy the relations as they have relation dependencies
}

EST_Item_Content::~EST_Item_Content()
{
    if (relations.length() != 0)
    {   // Shouldn't get here,  but just in case.
	cerr << "EST_Contents: contents still referenced by Relations" << endl;
    }
}

int EST_Item_Content::unref_relation(const EST_String &relname)
{
    // Unreference this item from this relation.  Returns TRUE
    // if no one else is relferencing it, FALSE otherwise
    if (this != 0)
    {
	if ((relname == "") && (relations.length() == 1))
	{   // sigh, something to with isolated EST_Items and
	    // SunCC causes a problems in exit(), so hit it with
	    // a bigger stick
	    relations.clear();
	    return TRUE;
	}
	if (relations.present(relname))
	    relations.remove_item(relname);
	else
	    printf("failed to find %s in %s at %g\n",
		   (const char *)relname,
		   (const char *)name(),
		   f.F("end",0.0));
	if (relations.length() == 0)
	    return TRUE;
    }
    return FALSE;
}

int EST_Item_Content::unref_and_delete()
{
    // Unreference from all relations and delete
    EST_Item *np;
    EST_Litem *p;

    for (p=relations.list.head(); p;)
    {
	np = ::item(relations.list(p).v);
	p=next(p);
	delete np;
    }
    // When the last relation is deleted this contents itself will be
    // delete too, from underneath us.
    return 0;
}

EST_Item_Content &EST_Item_Content::operator=(const EST_Item_Content &x)
{
    copy(x);
    return *this;
}

ostream& operator << (ostream &s, const EST_Item_Content &a)
{
    EST_Litem *p;
    s << a.name() << " ; ";
    s << a.f;
    s << "Relations";
    for (p=a.relations.list.head(); p; p = next(p))
	s << " " << a.relations.list(p).k;
    s << endl;
    return s;
}

VAL_REGISTER_CLASS_NODEL(icontent,EST_Item_Content)
