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QhullIterator.h
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QhullIterator.h
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/****************************************************************************
**
** Copyright (c) 2008-2015 C.B. Barber. All rights reserved.
** $Id: //main/2011/qhull/src/libqhullpcpp/QhullIterator.h#3 $$Change: 1810 $
** $DateTime: 2015/01/17 18:28:15 $$Author: bbarber $
**
****************************************************************************/
#ifndef QHULLITERATOR_H
#define QHULLITERATOR_H
extern "C" {
#include "libqhull/qhull_a.h"
}
#include <assert.h>
#include <string>
#include <vector>
//! Avoid dependence on <iterator>
namespace std { struct bidirectional_iterator_tag; struct random_access_iterator_tag; }
namespace orgQhull {
#//!\name Defined here
//! QHULL_DECLARE_SEQUENTIAL_ITERATOR(C) -- Declare a Java-style iterator
//! QHULL_DECLARE_MUTABLE_SEQUENTIAL_ITERATOR(C) -- Declare a mutable Java-style iterator
//! QHULL_DECLARE_SET_ITERATOR(C) -- Declare a set iterator
//! QHULL_DECLARE_MUTABLE_SET_ITERATOR(C) -- Declare a mutable set iterator
//! Derived from Qt/core/tools/qiterator.h and qset.h/FOREACHsetelement_()
// Changed c to C* as in Mutable... Assumes c does not go away.
#define QHULL_DECLARE_SEQUENTIAL_ITERATOR(C, T) \
\
class C##Iterator \
{ \
typedef C::const_iterator const_iterator; \
const C *c; \
const_iterator i; \
public: \
inline C##Iterator(const C &container) \
: c(&container), i(c->constBegin()) {} \
inline C##Iterator &operator=(const C &container) \
{ c = &container; i = c->constBegin(); return *this; } \
inline void toFront() { i = c->constBegin(); } \
inline void toBack() { i = c->constEnd(); } \
inline bool hasNext() const { return i != c->constEnd(); } \
inline const T &next() { return *i++; } \
inline const T &peekNext() const { return *i; } \
inline bool hasPrevious() const { return i != c->constBegin(); } \
inline const T &previous() { return *--i; } \
inline const T &peekPrevious() const { const_iterator p = i; return *--p; } \
inline bool findNext(const T &t) \
{ while (i != c->constEnd()) if (*i++ == t) return true; return false; } \
inline bool findPrevious(const T &t) \
{ while (i != c->constBegin()) if (*(--i) == t) return true; \
return false; } \
};//C##Iterator
// Remove setShareable() from Q_DECLARE_MUTABLE_SEQUENTIAL_ITERATOR
// Uses QHULL_ASSERT (assert.h)
// Duplicated in MutablePointIterator without insert or remove
#define QHULL_DECLARE_MUTABLE_SEQUENTIAL_ITERATOR(C, T) \
class Mutable##C##Iterator \
{ \
typedef C::iterator iterator; \
typedef C::const_iterator const_iterator; \
C *c; \
iterator i, n; \
inline bool item_exists() const { return const_iterator(n) != c->constEnd(); } \
public: \
inline Mutable##C##Iterator(C &container) \
: c(&container) \
{ i = c->begin(); n = c->end(); } \
inline ~Mutable##C##Iterator() \
{} \
inline Mutable##C##Iterator &operator=(C &container) \
{ c = &container; \
i = c->begin(); n = c->end(); return *this; } \
inline void toFront() { i = c->begin(); n = c->end(); } \
inline void toBack() { i = c->end(); n = i; } \
inline bool hasNext() const { return c->constEnd() != const_iterator(i); } \
inline T &next() { n = i++; return *n; } \
inline T &peekNext() const { return *i; } \
inline bool hasPrevious() const { return c->constBegin() != const_iterator(i); } \
inline T &previous() { n = --i; return *n; } \
inline T &peekPrevious() const { iterator p = i; return *--p; } \
inline void remove() \
{ if (c->constEnd() != const_iterator(n)) { i = c->erase(n); n = c->end(); } } \
inline void setValue(const T &t) const { if (c->constEnd() != const_iterator(n)) *n = t; } \
inline T &value() { QHULL_ASSERT(item_exists()); return *n; } \
inline const T &value() const { QHULL_ASSERT(item_exists()); return *n; } \
inline void insert(const T &t) { n = i = c->insert(i, t); ++i; } \
inline bool findNext(const T &t) \
{ while (c->constEnd() != const_iterator(n = i)) if (*i++ == t) return true; return false; } \
inline bool findPrevious(const T &t) \
{ while (c->constBegin() != const_iterator(i)) if (*(n = --i) == t) return true; \
n = c->end(); return false; } \
};//Mutable##C##Iterator
#define QHULL_DECLARE_SET_ITERATOR(C) \
\
template <class T> \
class Qhull##C##Iterator \
{ \
typedef typename Qhull##C<T>::const_iterator const_iterator; \
Qhull##C<T> c; \
const_iterator i; \
public: \
inline Qhull##C##Iterator(const Qhull##C<T> &container) \
: c(container), i(c.constBegin()) {} \
inline Qhull##C##Iterator &operator=(const Qhull##C<T> &container) \
{ c = container; i = c.constBegin(); return *this; } \
inline void toFront() { i = c.constBegin(); } \
inline void toBack() { i = c.constEnd(); } \
inline bool hasNext() const { return i != c.constEnd(); } \
inline const T &next() { return *i++; } \
inline const T &peekNext() const { return *i; } \
inline bool hasPrevious() const { return i != c.constBegin(); } \
inline const T &previous() { return *--i; } \
inline const T &peekPrevious() const { const_iterator p = i; return *--p; } \
inline bool findNext(const T &t) \
{ while (i != c.constEnd()) if (*i++ == t) return true; return false; } \
inline bool findPrevious(const T &t) \
{ while (i != c.constBegin()) if (*(--i) == t) return true; \
return false; } \
};//Qhull##C##Iterator
#define QHULL_DECLARE_MUTABLE_SET_ITERATOR(C) \
\
template <class T> \
class QhullMutable##C##Iterator \
{ \
typedef typename Qhull##C::iterator iterator; \
typedef typename Qhull##C::const_iterator const_iterator; \
Qhull##C *c; \
iterator i, n; \
inline bool item_exists() const { return const_iterator(n) != c->constEnd(); } \
public: \
inline Mutable##C##Iterator(Qhull##C &container) \
: c(&container) \
{ c->setSharable(false); i = c->begin(); n = c->end(); } \
inline ~Mutable##C##Iterator() \
{ c->setSharable(true); } \
inline Mutable##C##Iterator &operator=(Qhull##C &container) \
{ c->setSharable(true); c = &container; c->setSharable(false); \
i = c->begin(); n = c->end(); return *this; } \
inline void toFront() { i = c->begin(); n = c->end(); } \
inline void toBack() { i = c->end(); n = i; } \
inline bool hasNext() const { return c->constEnd() != const_iterator(i); } \
inline T &next() { n = i++; return *n; } \
inline T &peekNext() const { return *i; } \
inline bool hasPrevious() const { return c->constBegin() != const_iterator(i); } \
inline T &previous() { n = --i; return *n; } \
inline T &peekPrevious() const { iterator p = i; return *--p; } \
inline void remove() \
{ if (c->constEnd() != const_iterator(n)) { i = c->erase(n); n = c->end(); } } \
inline void setValue(const T &t) const { if (c->constEnd() != const_iterator(n)) *n = t; } \
inline T &value() { Q_ASSERT(item_exists()); return *n; } \
inline const T &value() const { Q_ASSERT(item_exists()); return *n; } \
inline void insert(const T &t) { n = i = c->insert(i, t); ++i; } \
inline bool findNext(const T &t) \
{ while (c->constEnd() != const_iterator(n = i)) if (*i++ == t) return true; return false; } \
inline bool findPrevious(const T &t) \
{ while (c->constBegin() != const_iterator(i)) if (*(n = --i) == t) return true; \
n = c->end(); return false; } \
};//QhullMutable##C##Iterator
}//namespace orgQhull
#endif // QHULLITERATOR_H

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