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twain3.0/3rdparty/hgOCR/include/ccutil/elst.h

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/**********************************************************************
* File: elst.h (Formerly elist.h)
* Description: Embedded list module include file.
* Author: Phil Cheatle
* Created: Mon Jan 07 08:35:34 GMT 1991
*
* (C) Copyright 1991, Hewlett-Packard Ltd.
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
** http://www.apache.org/licenses/LICENSE-2.0
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*
**********************************************************************/
#ifndef ELST_H
#define ELST_H
#include <stdio.h>
#include "host.h"
#include "serialis.h"
#include "lsterr.h"
class ELIST_ITERATOR;
/**********************************************************************
This module implements list classes and iterators.
The following list types and iterators are provided:
List type List Class Iterator Class Element Class
--------- ---------- -------------- -------------
Embedded list ELIST
ELIST_ITERATOR
ELIST_LINK
(Single linked)
Embedded list ELIST2
ELIST2_ITERATOR
ELIST2_LINK
(Double linked)
Cons List CLIST
CLIST_ITERATOR
CLIST_LINK
(Single linked)
Cons List CLIST2
CLIST2_ITERATOR
CLIST2_LINK
(Double linked)
An embedded list is where the list pointers are provided by a generic class.
Data types to be listed inherit from the generic class. Data is thus linked
in only ONE list at any one time.
A cons list has a separate structure for a "cons cell". This contains the
list pointer(s) AND a pointer to the data structure held on the list. A
structure can be on many cons lists at the same time, and the structure does
not need to inherit from any generic class in order to be on the list.
The implementation of lists is very careful about space and speed overheads.
This is why many embedded lists are provided. The same concerns mean that
in-line type coercion is done, rather than use virtual functions. This is
cumbersome in that each data type to be listed requires its own iterator and
list class - though macros can gererate these. It also prevents heterogeneous
lists.
**********************************************************************/
/**********************************************************************
* CLASS - ELIST_LINK
*
* Generic link class for singly linked lists with embedded links
*
* Note: No destructor - elements are assumed to be destroyed EITHER after
* they have been extracted from a list OR by the ELIST destructor which
* walks the list.
**********************************************************************/
class DLLSYM ELIST_LINK
{
friend class ELIST_ITERATOR;
friend class ELIST;
ELIST_LINK *next;
public:
ELIST_LINK() {
next = NULL;
}
//constructor
ELIST_LINK(const ELIST_LINK &) { // don't copy link.
next = NULL;
}
void operator=( // don't copy links
const ELIST_LINK &) {
next = NULL;
}
};
/**********************************************************************
* CLASS - ELIST
*
* Generic list class for singly linked lists with embedded links
**********************************************************************/
class DLLSYM ELIST
{
friend class ELIST_ITERATOR;
ELIST_LINK *last; //End of list
//(Points to head)
ELIST_LINK *First() { // return first
return last ? last->next : NULL;
}
public:
ELIST() { //constructor
last = NULL;
}
void internal_clear( //destroy all links
//ptr to zapper functn
void(*zapper) (ELIST_LINK *));
bool empty() const { //is list empty?
return !last;
}
bool singleton() const {
return last ? (last == last->next) : false;
}
void shallow_copy( //dangerous!!
ELIST *from_list) { //beware destructors!!
last = from_list->last;
}
//ptr to copier functn
void internal_deep_copy(ELIST_LINK * (*copier) (ELIST_LINK *),
const ELIST * list); //list being copied
void assign_to_sublist( //to this list
ELIST_ITERATOR *start_it, //from list start
ELIST_ITERATOR *end_it); //from list end
inT32 length() const; // # elements in list
void sort( //sort elements
int comparator( //comparison routine
const void *, const void *));
// Assuming list has been sorted already, insert new_link to
// keep the list sorted according to the same comparison function.
// Comparison function is the same as used by sort, i.e. uses double
// indirection. Time is O(1) to add to beginning or end.
// Time is linear to add pre-sorted items to an empty list.
// If unique is set to true and comparator() returns 0 (an entry with the
// same information as the one contained in new_link is already in the
// list) - new_link is not added to the list and the function returns the
// pointer to the identical entry that already exists in the list
// (otherwise the function returns new_link).
ELIST_LINK *add_sorted_and_find(int comparator(const void*, const void*),
bool unique, ELIST_LINK* new_link);
// Same as above, but returns true if the new entry was inserted, false
// if the identical entry already existed in the list.
bool add_sorted(int comparator(const void*, const void*),
bool unique, ELIST_LINK* new_link) {
return (add_sorted_and_find(comparator, unique, new_link) == new_link);
}
};
/***********************************************************************
* CLASS - ELIST_ITERATOR
*
* Generic iterator class for singly linked lists with embedded links
**********************************************************************/
class DLLSYM ELIST_ITERATOR
{
friend void ELIST::assign_to_sublist(ELIST_ITERATOR *, ELIST_ITERATOR *);
ELIST *list; //List being iterated
ELIST_LINK *prev; //prev element
ELIST_LINK *current; //current element
ELIST_LINK *next; //next element
bool ex_current_was_last; //current extracted
//was end of list
bool ex_current_was_cycle_pt; //current extracted
//was cycle point
ELIST_LINK *cycle_pt; //point we are cycling
//the list to.
bool started_cycling; //Have we moved off
//the start?
ELIST_LINK *extract_sublist( //from this current...
ELIST_ITERATOR *other_it); //to other current
public:
ELIST_ITERATOR() { //constructor
list = NULL;
} //unassigned list
explicit ELIST_ITERATOR(ELIST *list_to_iterate);
void set_to_list( //change list
ELIST *list_to_iterate);
void add_after_then_move( //add after current &
ELIST_LINK *new_link); //move to new
void add_after_stay_put( //add after current &
ELIST_LINK *new_link); //stay at current
void add_before_then_move( //add before current &
ELIST_LINK *new_link); //move to new
void add_before_stay_put( //add before current &
ELIST_LINK *new_link); //stay at current
void add_list_after( //add a list &
ELIST *list_to_add); //stay at current
void add_list_before( //add a list &
ELIST *list_to_add); //move to it 1st item
ELIST_LINK *data() { //get current data
#ifndef NDEBUG
if (!list)
NO_LIST.error("ELIST_ITERATOR::data", ABORT, NULL);
if (!current)
NULL_DATA.error("ELIST_ITERATOR::data", ABORT, NULL);
#endif
return current;
}
ELIST_LINK *data_relative( //get data + or - ...
inT8 offset); //offset from current
ELIST_LINK *forward(); //move to next element
ELIST_LINK *extract(); //remove from list
ELIST_LINK *move_to_first(); //go to start of list
ELIST_LINK *move_to_last(); //go to end of list
void mark_cycle_pt(); //remember current
bool empty() { //is list empty?
#ifndef NDEBUG
if (!list)
NO_LIST.error("ELIST_ITERATOR::empty", ABORT, NULL);
#endif
return list->empty();
}
bool current_extracted() { //current extracted?
return !current;
}
bool at_first(); //Current is first?
bool at_last(); //Current is last?
bool cycled_list(); //Completed a cycle?
void add_to_end( // add at end &
ELIST_LINK *new_link); // don't move
void exchange( //positions of 2 links
ELIST_ITERATOR *other_it); //other iterator
inT32 length(); //# elements in list
void sort( //sort elements
int comparator( //comparison routine
const void *, const void *));
};
/***********************************************************************
* ELIST_ITERATOR::set_to_list
*
* (Re-)initialise the iterator to point to the start of the list_to_iterate
* over.
**********************************************************************/
inline void ELIST_ITERATOR::set_to_list( //change list
ELIST *list_to_iterate) {
#ifndef NDEBUG
if (!list_to_iterate)
BAD_PARAMETER.error("ELIST_ITERATOR::set_to_list", ABORT,
"list_to_iterate is NULL");
#endif
list = list_to_iterate;
prev = list->last;
current = list->First();
next = current ? current->next : NULL;
cycle_pt = NULL; //await explicit set
started_cycling = FALSE;
ex_current_was_last = FALSE;
ex_current_was_cycle_pt = FALSE;
}
/***********************************************************************
* ELIST_ITERATOR::ELIST_ITERATOR
*
* CONSTRUCTOR - set iterator to specified list;
**********************************************************************/
inline ELIST_ITERATOR::ELIST_ITERATOR(ELIST *list_to_iterate) {
set_to_list(list_to_iterate);
}
/***********************************************************************
* ELIST_ITERATOR::add_after_then_move
*
* Add a new element to the list after the current element and move the
* iterator to the new element.
**********************************************************************/
inline void ELIST_ITERATOR::add_after_then_move( // element to add
ELIST_LINK *new_element) {
#ifndef NDEBUG
if (!list)
NO_LIST.error("ELIST_ITERATOR::add_after_then_move", ABORT, NULL);
if (!new_element)
BAD_PARAMETER.error("ELIST_ITERATOR::add_after_then_move", ABORT,
"new_element is NULL");
if (new_element->next)
STILL_LINKED.error("ELIST_ITERATOR::add_after_then_move", ABORT, NULL);
#endif
if (list->empty()) {
new_element->next = new_element;
list->last = new_element;
prev = next = new_element;
}
else {
new_element->next = next;
if (current) { //not extracted
current->next = new_element;
prev = current;
if (current == list->last)
list->last = new_element;
}
else { //current extracted
prev->next = new_element;
if (ex_current_was_last)
list->last = new_element;
if (ex_current_was_cycle_pt)
cycle_pt = new_element;
}
}
current = new_element;
}
/***********************************************************************
* ELIST_ITERATOR::add_after_stay_put
*
* Add a new element to the list after the current element but do not move
* the iterator to the new element.
**********************************************************************/
inline void ELIST_ITERATOR::add_after_stay_put( // element to add
ELIST_LINK *new_element) {
#ifndef NDEBUG
if (!list)
NO_LIST.error("ELIST_ITERATOR::add_after_stay_put", ABORT, NULL);
if (!new_element)
BAD_PARAMETER.error("ELIST_ITERATOR::add_after_stay_put", ABORT,
"new_element is NULL");
if (new_element->next)
STILL_LINKED.error("ELIST_ITERATOR::add_after_stay_put", ABORT, NULL);
#endif
if (list->empty()) {
new_element->next = new_element;
list->last = new_element;
prev = next = new_element;
ex_current_was_last = FALSE;
current = NULL;
}
else {
new_element->next = next;
if (current) { //not extracted
current->next = new_element;
if (prev == current)
prev = new_element;
if (current == list->last)
list->last = new_element;
}
else { //current extracted
prev->next = new_element;
if (ex_current_was_last) {
list->last = new_element;
ex_current_was_last = FALSE;
}
}
next = new_element;
}
}
/***********************************************************************
* ELIST_ITERATOR::add_before_then_move
*
* Add a new element to the list before the current element and move the
* iterator to the new element.
**********************************************************************/
inline void ELIST_ITERATOR::add_before_then_move( // element to add
ELIST_LINK *new_element) {
#ifndef NDEBUG
if (!list)
NO_LIST.error("ELIST_ITERATOR::add_before_then_move", ABORT, NULL);
if (!new_element)
BAD_PARAMETER.error("ELIST_ITERATOR::add_before_then_move", ABORT,
"new_element is NULL");
if (new_element->next)
STILL_LINKED.error("ELIST_ITERATOR::add_before_then_move", ABORT, NULL);
#endif
if (list->empty()) {
new_element->next = new_element;
list->last = new_element;
prev = next = new_element;
}
else {
prev->next = new_element;
if (current) { //not extracted
new_element->next = current;
next = current;
}
else { //current extracted
new_element->next = next;
if (ex_current_was_last)
list->last = new_element;
if (ex_current_was_cycle_pt)
cycle_pt = new_element;
}
}
current = new_element;
}
/***********************************************************************
* ELIST_ITERATOR::add_before_stay_put
*
* Add a new element to the list before the current element but don't move the
* iterator to the new element.
**********************************************************************/
inline void ELIST_ITERATOR::add_before_stay_put( // element to add
ELIST_LINK *new_element) {
#ifndef NDEBUG
if (!list)
NO_LIST.error("ELIST_ITERATOR::add_before_stay_put", ABORT, NULL);
if (!new_element)
BAD_PARAMETER.error("ELIST_ITERATOR::add_before_stay_put", ABORT,
"new_element is NULL");
if (new_element->next)
STILL_LINKED.error("ELIST_ITERATOR::add_before_stay_put", ABORT, NULL);
#endif
if (list->empty()) {
new_element->next = new_element;
list->last = new_element;
prev = next = new_element;
ex_current_was_last = TRUE;
current = NULL;
}
else {
prev->next = new_element;
if (current) { //not extracted
new_element->next = current;
if (next == current)
next = new_element;
}
else { //current extracted
new_element->next = next;
if (ex_current_was_last)
list->last = new_element;
}
prev = new_element;
}
}
/***********************************************************************
* ELIST_ITERATOR::add_list_after
*
* Insert another list to this list after the current element but don't move
*the
* iterator.
**********************************************************************/
inline void ELIST_ITERATOR::add_list_after(ELIST *list_to_add) {
#ifndef NDEBUG
if (!list)
NO_LIST.error("ELIST_ITERATOR::add_list_after", ABORT, NULL);
if (!list_to_add)
BAD_PARAMETER.error("ELIST_ITERATOR::add_list_after", ABORT,
"list_to_add is NULL");
#endif
if (!list_to_add->empty()) {
if (list->empty()) {
list->last = list_to_add->last;
prev = list->last;
next = list->First();
ex_current_was_last = TRUE;
current = NULL;
}
else {
if (current) { //not extracted
current->next = list_to_add->First();
if (current == list->last)
list->last = list_to_add->last;
list_to_add->last->next = next;
next = current->next;
}
else { //current extracted
prev->next = list_to_add->First();
if (ex_current_was_last) {
list->last = list_to_add->last;
ex_current_was_last = FALSE;
}
list_to_add->last->next = next;
next = prev->next;
}
}
list_to_add->last = NULL;
}
}
/***********************************************************************
* ELIST_ITERATOR::add_list_before
*
* Insert another list to this list before the current element. Move the
* iterator to the start of the inserted elements
* iterator.
**********************************************************************/
inline void ELIST_ITERATOR::add_list_before(ELIST *list_to_add) {
#ifndef NDEBUG
if (!list)
NO_LIST.error("ELIST_ITERATOR::add_list_before", ABORT, NULL);
if (!list_to_add)
BAD_PARAMETER.error("ELIST_ITERATOR::add_list_before", ABORT,
"list_to_add is NULL");
#endif
if (!list_to_add->empty()) {
if (list->empty()) {
list->last = list_to_add->last;
prev = list->last;
current = list->First();
next = current->next;
ex_current_was_last = FALSE;
}
else {
prev->next = list_to_add->First();
if (current) { //not extracted
list_to_add->last->next = current;
}
else { //current extracted
list_to_add->last->next = next;
if (ex_current_was_last)
list->last = list_to_add->last;
if (ex_current_was_cycle_pt)
cycle_pt = prev->next;
}
current = prev->next;
next = current->next;
}
list_to_add->last = NULL;
}
}
/***********************************************************************
* ELIST_ITERATOR::extract
*
* Do extraction by removing current from the list, returning it to the
* caller, but NOT updating the iterator. (So that any calling loop can do
* this.) The iterator's current points to NULL. If the extracted element
* is to be deleted, this is the callers responsibility.
**********************************************************************/
inline ELIST_LINK *ELIST_ITERATOR::extract() {
ELIST_LINK *extracted_link;
#ifndef NDEBUG
if (!list)
NO_LIST.error("ELIST_ITERATOR::extract", ABORT, NULL);
if (!current) //list empty or
//element extracted
NULL_CURRENT.error("ELIST_ITERATOR::extract",
ABORT, NULL);
#endif
if (list->singleton()) {
// Special case where we do need to change the iterator.
prev = next = list->last = NULL;
}
else {
prev->next = next; //remove from list
if (current == list->last) {
list->last = prev;
ex_current_was_last = TRUE;
}
else {
ex_current_was_last = FALSE;
}
}
// Always set ex_current_was_cycle_pt so an add/forward will work in a loop.
ex_current_was_cycle_pt = (current == cycle_pt) ? TRUE : FALSE;
extracted_link = current;
extracted_link->next = NULL; //for safety
current = NULL;
return extracted_link;
}
/***********************************************************************
* ELIST_ITERATOR::move_to_first()
*
* Move current so that it is set to the start of the list.
* Return data just in case anyone wants it.
**********************************************************************/
inline ELIST_LINK *ELIST_ITERATOR::move_to_first() {
#ifndef NDEBUG
if (!list)
NO_LIST.error("ELIST_ITERATOR::move_to_first", ABORT, NULL);
#endif
current = list->First();
prev = list->last;
next = current ? current->next : NULL;
return current;
}
/***********************************************************************
* ELIST_ITERATOR::mark_cycle_pt()
*
* Remember the current location so that we can tell whether we've returned
* to this point later.
*
* If the current point is deleted either now, or in the future, the cycle
* point will be set to the next item which is set to current. This could be
* by a forward, add_after_then_move or add_after_then_move.
**********************************************************************/
inline void ELIST_ITERATOR::mark_cycle_pt() {
#ifndef NDEBUG
if (!list)
NO_LIST.error("ELIST_ITERATOR::mark_cycle_pt", ABORT, NULL);
#endif
if (current)
cycle_pt = current;
else
ex_current_was_cycle_pt = TRUE;
started_cycling = FALSE;
}
/***********************************************************************
* ELIST_ITERATOR::at_first()
*
* Are we at the start of the list?
*
**********************************************************************/
inline bool ELIST_ITERATOR::at_first() {
#ifndef NDEBUG
if (!list)
NO_LIST.error("ELIST_ITERATOR::at_first", ABORT, NULL);
#endif
//we're at a deleted
return ((list->empty()) || (current == list->First()) || ((current == NULL) &&
(prev == list->last) && //NON-last pt between
!ex_current_was_last)); //first and last
}
/***********************************************************************
* ELIST_ITERATOR::at_last()
*
* Are we at the end of the list?
*
**********************************************************************/
inline bool ELIST_ITERATOR::at_last() {
#ifndef NDEBUG
if (!list)
NO_LIST.error("ELIST_ITERATOR::at_last", ABORT, NULL);
#endif
//we're at a deleted
return ((list->empty()) || (current == list->last) || ((current == NULL) &&
(prev == list->last) && //last point between
ex_current_was_last)); //first and last
}
/***********************************************************************
* ELIST_ITERATOR::cycled_list()
*
* Have we returned to the cycle_pt since it was set?
*
**********************************************************************/
inline bool ELIST_ITERATOR::cycled_list() {
#ifndef NDEBUG
if (!list)
NO_LIST.error("ELIST_ITERATOR::cycled_list", ABORT, NULL);
#endif
return ((list->empty()) || ((current == cycle_pt) && started_cycling));
}
/***********************************************************************
* ELIST_ITERATOR::length()
*
* Return the length of the list
*
**********************************************************************/
inline inT32 ELIST_ITERATOR::length() {
#ifndef NDEBUG
if (!list)
NO_LIST.error("ELIST_ITERATOR::length", ABORT, NULL);
#endif
return list->length();
}
/***********************************************************************
* ELIST_ITERATOR::sort()
*
* Sort the elements of the list, then reposition at the start.
*
**********************************************************************/
inline void
ELIST_ITERATOR::sort( //sort elements
int comparator( //comparison routine
const void *, const void *)) {
#ifndef NDEBUG
if (!list)
NO_LIST.error("ELIST_ITERATOR::sort", ABORT, NULL);
#endif
list->sort(comparator);
move_to_first();
}
/***********************************************************************
* ELIST_ITERATOR::add_to_end
*
* Add a new element to the end of the list without moving the iterator.
* This is provided because a single linked list cannot move to the last as
* the iterator couldn't set its prev pointer. Adding to the end is
* essential for implementing
queues.
**********************************************************************/
inline void ELIST_ITERATOR::add_to_end( // element to add
ELIST_LINK *new_element) {
#ifndef NDEBUG
if (!list)
NO_LIST.error("ELIST_ITERATOR::add_to_end", ABORT, NULL);
if (!new_element)
BAD_PARAMETER.error("ELIST_ITERATOR::add_to_end", ABORT,
"new_element is NULL");
if (new_element->next)
STILL_LINKED.error("ELIST_ITERATOR::add_to_end", ABORT, NULL);
#endif
if (this->at_last()) {
this->add_after_stay_put(new_element);
}
else {
if (this->at_first()) {
this->add_before_stay_put(new_element);
list->last = new_element;
}
else { //Iteratr is elsewhere
new_element->next = list->last->next;
list->last->next = new_element;
list->last = new_element;
}
}
}
/***********************************************************************
******************** MACROS **************************************
***********************************************************************/
/***********************************************************************
QUOTE_IT MACRO DEFINITION
===========================
Replace <parm> with "<parm>". <parm> may be an arbitrary number of tokens
***********************************************************************/
#define QUOTE_IT( parm ) #parm
/***********************************************************************
ELISTIZE( CLASSNAME ) MACRO
============================
CLASSNAME is assumed to be the name of a class which has a baseclass of
ELIST_LINK.
NOTE: Because we don't use virtual functions in the list code, the list code
will NOT work correctly for classes derived from this.
The macros generate:
- An element deletion function: CLASSNAME##_zapper
- An E_LIST subclass: CLASSNAME##_LIST
- An E_LIST_ITERATOR subclass: CLASSNAME##_IT
NOTE: Generated names are DELIBERATELY designed to clash with those for
ELIST2IZE but NOT with those for CLISTIZE and CLIST2IZE
Two macros are provided: ELISTIZE and ELISTIZEH.
The ...IZEH macros just define the class names for use in .h files
The ...IZE macros define the code use in .c files
***********************************************************************/
/***********************************************************************
ELISTIZEH( CLASSNAME ) MACRO
ELISTIZEH is a concatenation of 3 fragments ELISTIZEH_A, ELISTIZEH_B and
ELISTIZEH_C.
***********************************************************************/
#define ELISTIZEH_A(CLASSNAME) \
\
extern DLLSYM void CLASSNAME##_zapper(ELIST_LINK* link);
#define ELISTIZEH_B(CLASSNAME) \
\
/*********************************************************************** \
* CLASS - CLASSNAME##_LIST \
* \
* List class for class CLASSNAME \
* \
**********************************************************************/ \
\
class DLLSYM CLASSNAME##_LIST : public ELIST { \
public: \
CLASSNAME##_LIST():ELIST() {} \
\
void clear() { /* delete elements */\
ELIST::internal_clear(&CLASSNAME##_zapper); \
} \
\
~CLASSNAME##_LIST() { \
clear(); \
} \
\
/* Become a deep copy of src_list*/ \
void deep_copy(const CLASSNAME##_LIST* src_list, \
CLASSNAME* (*copier)(const CLASSNAME*)); \
\
private: \
/* Prevent assign and copy construction. */ \
CLASSNAME##_LIST(const CLASSNAME##_LIST&) { \
DONT_CONSTRUCT_LIST_BY_COPY.error(QUOTE_IT(CLASSNAME##_LIST), ABORT, NULL);\
} \
void operator=(const CLASSNAME##_LIST&) { \
DONT_ASSIGN_LISTS.error(QUOTE_IT(CLASSNAME##_LIST), ABORT, NULL ); \
} \
#define ELISTIZEH_C( CLASSNAME ) \
}; \
\
\
\
/*********************************************************************** \
* CLASS - CLASSNAME##_IT \
* \
* Iterator class for class CLASSNAME##_LIST \
* \
* Note: We don't need to coerce pointers to member functions input \
* parameters as these are automatically converted to the type of the base \
* type. ("A ptr to a class may be converted to a pointer to a public base \
* class of that class") \
**********************************************************************/ \
\
class DLLSYM CLASSNAME##_IT : public ELIST_ITERATOR { \
public: \
CLASSNAME##_IT():ELIST_ITERATOR(){} \
\
/* TODO(rays) This constructor should be explicit, but that means changing \
hundreds of incorrect initializations of iterators that use = over () */ \
CLASSNAME##_IT(CLASSNAME##_LIST* list) : ELIST_ITERATOR(list) {} \
\
CLASSNAME* data() { \
return reinterpret_cast<CLASSNAME*>(ELIST_ITERATOR::data()); \
} \
\
CLASSNAME* data_relative(inT8 offset) { \
return reinterpret_cast<CLASSNAME*>(ELIST_ITERATOR::data_relative(offset));\
} \
\
CLASSNAME* forward() { \
return reinterpret_cast<CLASSNAME*>(ELIST_ITERATOR::forward()); \
} \
\
CLASSNAME* extract() { \
return reinterpret_cast<CLASSNAME*>(ELIST_ITERATOR::extract()); \
} \
\
CLASSNAME* move_to_first() { \
return reinterpret_cast<CLASSNAME*>(ELIST_ITERATOR::move_to_first()); \
} \
\
CLASSNAME* move_to_last() { \
return reinterpret_cast<CLASSNAME*>(ELIST_ITERATOR::move_to_last()); \
} \
};
#define ELISTIZEH( CLASSNAME ) \
\
ELISTIZEH_A( CLASSNAME ) \
\
ELISTIZEH_B( CLASSNAME ) \
\
ELISTIZEH_C( CLASSNAME )
/***********************************************************************
ELISTIZE( CLASSNAME ) MACRO
***********************************************************************/
#define ELISTIZE(CLASSNAME) \
\
/*********************************************************************** \
* CLASSNAME##_zapper \
* \
* A function which can delete a CLASSNAME element. This is passed to the \
* generic clear list member function so that when a list is cleared the \
* elements on the list are properly destroyed from the base class, even \
* though we don't use a virtual destructor function. \
**********************************************************************/ \
\
DLLSYM void CLASSNAME##_zapper(ELIST_LINK *link) { \
delete reinterpret_cast<CLASSNAME *>(link); \
} \
\
/* Become a deep copy of src_list*/ \
void CLASSNAME##_LIST::deep_copy(const CLASSNAME##_LIST *src_list, \
CLASSNAME *(*copier)(const CLASSNAME *)) { \
CLASSNAME##_IT from_it(const_cast<CLASSNAME##_LIST *>(src_list)); \
CLASSNAME##_IT to_it(this); \
\
for (from_it.mark_cycle_pt(); !from_it.cycled_list(); from_it.forward()) \
to_it.add_after_then_move((*copier)(from_it.data())); \
}
#endif