133 lines
3 KiB
C
133 lines
3 KiB
C
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//
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// wcsibase.h Base Class Definitions for the WATCOM Container Skip List
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// Iterator Classes
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//
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// =========================================================================
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//
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// Open Watcom Project
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//
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// Copyright (c) 2002-2010 Open Watcom Contributors. All Rights Reserved.
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// Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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//
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// This file is automatically generated. Do not edit directly.
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//
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// =========================================================================
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//
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#ifndef _WCSIBASE_H_INCLUDED
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#define _WCSIBASE_H_INCLUDED
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#ifndef _ENABLE_AUTODEPEND
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#pragma read_only_file;
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#endif
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#ifndef __cplusplus
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#error This header file requires C++
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#endif
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#ifndef _WCEXCEPT_H_INCLUDED
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#include <wcexcept.h>
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#endif
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//
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// The WCSkipListIterBase is the base iterator class for all skip list
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// iterators.
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//
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// Objects of this type should never be instantiated: use the appropriate
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// skip list iterator defined in wcskipit.h instead.
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//
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// WCIterExcept is used as a base class to provide exception handling
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//
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template<class Type>
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class WCSkipListIterBase : public WCIterExcept {
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private:
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typedef WCSkipListPtrs * node_ptr;
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const WCSkipListBase<Type> *curr_skip_list;
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protected:
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node_ptr curr;
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private:
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int at_end;
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WCbool base_advance();
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protected:
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inline WCSkipListNode<Type> *base_curr_node() const {
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if( curr != 0 ) {
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return( WCSkipListBase<Type>::base_whole_node( curr ) );
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} else {
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return( 0 );
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}
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};
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public:
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inline WCSkipListIterBase() : curr_skip_list( 0 )
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, curr( 0 ), at_end( 0 ) {};
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inline WCSkipListIterBase( const WCSkipListBase<Type>& skip_list )
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: curr_skip_list( &skip_list ), curr( 0 ), at_end( 0 ) {};
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inline ~WCSkipListIterBase() {};
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inline const WCSkipListBase<Type> *container() const {
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if( curr_skip_list == 0 ) {
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base_throw_undef_iter();
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}
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return( curr_skip_list );
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};
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Type current() const;
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inline void reset() {
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curr = 0;
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at_end = 0;
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};
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inline void reset( const WCSkipListBase<Type> &skip_list ) {
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curr_skip_list = &skip_list;
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reset();
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};
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inline WCbool operator++() {
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return( base_advance() );
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}
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inline WCbool operator()() {
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return( base_advance() );
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}
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};
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template <class Type>
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WCbool WCSkipListIterBase<Type>::base_advance() {
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if( ( curr_skip_list == 0 )||( at_end ) ) {
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at_end = 1;
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base_throw_undef_iter();
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return( FALSE );
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}
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if( curr == 0 ) {
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curr = curr_skip_list->header;
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}
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curr = curr->forward[ 0 ];
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if( curr == 0 ) {
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at_end = 1;
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return( FALSE );
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} else {
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return( TRUE );
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}
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};
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template <class Type>
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Type WCSkipListIterBase<Type>::current() const {
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if( curr == 0 ) {
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base_throw_undef_item();
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Type temp;
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return( temp );
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}
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return( base_curr_node()->data );
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};
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#endif
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