/*

* NIST STEP Core Class Library

* clstepcore/STEPattributeList.cc

* April 1997

* K. C. Morris

* David Sauder

* Development of this software was funded by the United States Government,

* and is not subject to copyright.

*/

#include "clstepcore/STEPattributeList.h"

#include "clstepcore/STEPattribute.h"

AttrListNode::AttrListNode( STEPattribute * a ) {

attr = a;

}

AttrListNode::~AttrListNode() {

}

STEPattributeList::STEPattributeList() {

}

STEPattributeList::~STEPattributeList() {

}

STEPattribute & STEPattributeList::operator []( int n ) {

int x = 0;

AttrListNode * a = ( AttrListNode * )head;

int cnt = EntryCount();

if( n < cnt ) {

while( a && ( x < n ) ) {

a = ( AttrListNode * )( a->next );

x++;

}

}

if( a ) {

return *( a->attr );

}

// else - error case: return a static error object to avoid undefined behavior

// The error object allows calling code to detect the error condition

static STEPattribute errorAttr;

cerr << "\nERROR in STEP Core library: " << __FILE__ << ":"

<< __LINE__ << "\n" << _POC_ << "\n\n";

errorAttr.Error().AppendToDetailMsg( "STEPattributeList::operator[] - index out of bounds" );

errorAttr.Error().severity( SEVERITY_BUG );

return errorAttr;

}

int STEPattributeList::list_length() {

return EntryCount();

}

void STEPattributeList::push( STEPattribute * a ) {

AttrListNode * a2 = ( AttrListNode * )head;

// if the attribute already exists in the list, don't push it

while( a2 ) {

if( *a == *( a2 -> attr ) ) {

return;

}

a2 = ( AttrListNode * )( a2->next );

}

a->incrRefCount();

AttrListNode * saln = new AttrListNode( a );

AppendNode( saln );

}