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- // This may look like C code, but it is really -*- C++ -*-
- /*
- Copyright (C) 1988 Free Software Foundation
- written by Doug Lea (dl@rocky.oswego.edu)
- based on code by Marc Shapiro (shapiro@sor.inria.fr)
-
- This file is part of the GNU C++ Library. This library is free
- software; you can redistribute it and/or modify it under the terms of
- the GNU Library General Public License as published by the Free
- Software Foundation; either version 2 of the License, or (at your
- option) any later version. This library is distributed in the hope
- that it will be useful, but WITHOUT ANY WARRANTY; without even the
- implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- PURPOSE. See the GNU Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free Software
- Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
- #ifndef _<T>RPlex_h
- #ifdef __GNUG__
- #pragma interface
- #endif
- #define _<T>RPlex_h 1
-
- #include "<T>.Plex.h"
-
- // minimum number of chunks to index
-
- #ifndef MIN_NCHUNKS
- #define MIN_NCHUNKS 16
- #endif
-
- class <T>RPlex: public <T>Plex
- {
- int base; // base index of lowest chunk
- int lch; // index of lowest used chunk
- int fch; // 1 + index of highest used chunk
- int maxch; // max chunks in array
- <T>IChunk** chunks; // array of chunks
- <T>IChunk* ch; // cached chunk
-
- void make_initial_chunks(int up = 1);
-
- void cache(int idx) const;
- void cache(const <T>* p) const;
- <T>* dopred(const <T>* p) const;
- <T>* dosucc(const <T>* p) const;
-
- void set_cache(const <T>IChunk* t) const; // logically,
- // not physically const
-
- public:
- <T>RPlex(); // set low = 0;
- // fence = 0;
- // csize = default
-
- <T>RPlex(int ch_size); // low = 0;
- // fence = 0;
- // csize = ch_size
-
- <T>RPlex(int lo, // low = lo;
- int ch_size); // fence=lo
- // csize = ch_size
-
- <T>RPlex(int lo, // low = lo
- int hi, // fence = hi+1
- const <T&> initval,// fill with initval,
- int ch_size = 0); // csize= ch_size
- // or fence-lo if 0
-
- <T>RPlex(const <T>RPlex&);
-
- ~<T>RPlex();
-
- void operator= (const <T>RPlex&);
-
- // virtuals
-
- <T>& high_element ();
- <T>& low_element ();
-
- const <T>& high_element () const;
- const <T>& low_element () const;
-
- Pix first() const;
- Pix last() const;
- void prev(Pix& ptr) const;
- void next(Pix& ptr) const;
- int owns(Pix p) const;
- <T>& operator () (Pix p);
- const <T>& operator () (Pix p) const;
-
- int low() const;
- int high() const;
- int valid(int idx) const;
- void prev(int& idx) const;
- void next(int& x) const;
- <T>& operator [] (int index);
- const <T>& operator [] (int index) const;
-
- int Pix_to_index(Pix p) const;
- Pix index_to_Pix(int idx) const;
-
- int can_add_high() const;
- int can_add_low() const;
- int full() const;
-
- int add_high(const <T&> elem);
- int del_high ();
- int add_low (const <T&> elem);
- int del_low ();
-
- void fill(const <T&> x);
- void fill(const <T&> x, int from, int to);
- void clear();
- void reverse();
-
- int reset_low(int newlow);
-
- int OK () const;
- };
-
-
- inline void <T>RPlex::prev(int& idx) const
- {
- --idx;
- }
-
- inline void <T>RPlex::next(int& idx) const
- {
- ++idx;
- }
-
- inline int <T>RPlex::full () const
- {
- return 0;
- }
-
- inline int <T>RPlex::can_add_high() const
- {
- return 1;
- }
-
- inline int <T>RPlex::can_add_low() const
- {
- return 1;
- }
-
- inline int <T>RPlex::valid (int idx) const
- {
- return idx >= lo && idx < fnc;
- }
-
- inline int <T>RPlex::low() const
- {
- return lo;
- }
-
- inline int <T>RPlex::high() const
- {
- return fnc - 1;
- }
-
- inline void <T>RPlex::set_cache(const <T>IChunk* t) const
- {
- ((<T>RPlex*)(this))->ch = (<T>IChunk*)t;
- }
-
- inline void <T>RPlex::cache(int idx) const
- {
- if (idx < lo || idx >= fnc) index_error();
- set_cache(chunks[(idx - base) / csize]);
- }
-
- inline <T>& <T>RPlex::low_element ()
- {
- cache(lo); return *(ch->pointer_to(lo));
- }
-
- inline <T>& <T>RPlex::high_element ()
- {
- cache(fnc-1); return *(ch->pointer_to(fnc - 1));
- }
-
- inline const <T>& <T>RPlex::low_element () const
- {
- cache(lo); return *((const <T>*)(ch->pointer_to(lo)));
- }
-
- inline const <T>& <T>RPlex::high_element () const
- {
- cache(fnc-1); return *((const <T>*)(ch->pointer_to(fnc - 1)));
- }
-
- inline int <T>RPlex::Pix_to_index(Pix px) const
- {
- <T>* p = (<T>*)px;
- if (!ch->actual_pointer(p)) cache(p);
- return ch->index_of(p);
- }
-
- inline Pix <T>RPlex::index_to_Pix(int idx) const
- {
- if (!ch->actual_index(idx)) cache(idx);
- return (Pix)(ch->pointer_to(idx));
- }
-
- inline Pix <T>RPlex::first() const
- {
- return Pix(hd-><T>IChunk::first_pointer());
- }
-
- inline Pix <T>RPlex::last() const
- {
- return Pix(tl()-><T>IChunk::last_pointer());
- }
-
- inline void <T>RPlex::prev(Pix& p) const
- {
- Pix q = Pix(ch-><T>IChunk::pred((<T>*)p));
- p = (q == 0)? Pix(dopred((<T>*)p)) : q;
- }
-
- inline void <T>RPlex::next(Pix& p) const
- {
- Pix q = Pix(ch-><T>IChunk::succ((<T>*)p));
- p = (q == 0)? Pix(dosucc((<T>*)p)) : q;
- }
-
- inline <T>& <T>RPlex:: operator () (Pix p)
- {
- return *((<T>*)p);
- }
-
-
- inline <T>& <T>RPlex:: operator [] (int idx)
- {
- cache(idx); return *(ch->pointer_to(idx));
- }
-
- inline const <T>& <T>RPlex:: operator () (Pix p) const
- {
- return *((const <T>*)p);
- }
-
- inline const <T>& <T>RPlex:: operator [] (int idx) const
- {
- cache(idx); return *((const <T>*)(ch->pointer_to(idx)));
- }
-
- inline <T>RPlex::~<T>RPlex()
- {
- delete chunks;
- }
-
- #endif
-