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-rw-r--r--gnu/lib/libg++/g++-include/XPlex.ccP397
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diff --git a/gnu/lib/libg++/g++-include/XPlex.ccP b/gnu/lib/libg++/g++-include/XPlex.ccP
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+++ b/gnu/lib/libg++/g++-include/XPlex.ccP
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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.
+*/
+
+#ifdef __GNUG__
+#pragma implementation
+#endif
+#include "<T>.XPlex.h"
+
+
+<T>XPlex:: <T>XPlex()
+{
+ lo = fnc = 0;
+ csize = DEFAULT_INITIAL_CAPACITY;
+ <T>* data = new <T>[csize];
+ set_cache(new <T>IChunk(data, lo, lo, fnc, lo+csize));
+ hd = ch;
+}
+
+<T>XPlex:: <T>XPlex(int chunksize)
+{
+ if (chunksize == 0) error("invalid constructor specification");
+ lo = fnc = 0;
+ if (chunksize > 0)
+ {
+ csize = chunksize;
+ <T>* data = new <T>[csize];
+ set_cache(new <T>IChunk(data, lo, lo, fnc, csize));
+ hd = ch;
+ }
+ else
+ {
+ csize = -chunksize;
+ <T>* data = new <T>[csize];
+ set_cache(new <T>IChunk(data, chunksize, lo, fnc, fnc));
+ hd = ch;
+ }
+}
+
+
+<T>XPlex:: <T>XPlex(int l, int chunksize)
+{
+ if (chunksize == 0) error("invalid constructor specification");
+ lo = fnc = l;
+ if (chunksize > 0)
+ {
+ csize = chunksize;
+ <T>* data = new <T>[csize];
+ set_cache(new <T>IChunk(data, lo, lo, fnc, csize+lo));
+ hd = ch;
+ }
+ else
+ {
+ csize = -chunksize;
+ <T>* data = new <T>[csize];
+ set_cache(new <T>IChunk(data, chunksize+lo, lo, fnc, fnc));
+ hd = ch;
+ }
+}
+
+void <T>XPlex::make_initial_chunks(int up)
+{
+ int need = fnc - lo;
+ hd = 0;
+ if (up)
+ {
+ int l = lo;
+ do
+ {
+ int sz;
+ if (need >= csize)
+ sz = csize;
+ else
+ sz = need;
+ <T>* data = new <T> [csize];
+ <T>IChunk* h = new <T>IChunk(data, l, l, l+sz, l+csize);
+ if (hd != 0)
+ h->link_to_next(hd);
+ else
+ hd = h;
+ l += sz;
+ need -= sz;
+ } while (need > 0);
+ }
+ else
+ {
+ int hi = fnc;
+ do
+ {
+ int sz;
+ if (need >= csize)
+ sz = csize;
+ else
+ sz = need;
+ <T>* data = new <T> [csize];
+ <T>IChunk* h = new <T>IChunk(data, hi-csize, hi-sz, hi, hi);
+ if (hd != 0)
+ h->link_to_next(hd);
+ hd = h;
+ hi -= sz;
+ need -= sz;
+ } while (need > 0);
+ }
+ set_cache(hd);
+}
+
+<T>XPlex:: <T>XPlex(int l, int hi, const <T&> initval, int chunksize)
+{
+ lo = l;
+ fnc = hi + 1;
+ if (chunksize == 0)
+ {
+ csize = fnc - l;
+ make_initial_chunks(1);
+ }
+ else if (chunksize < 0)
+ {
+ csize = -chunksize;
+ make_initial_chunks(0);
+ }
+ else
+ {
+ csize = chunksize;
+ make_initial_chunks(1);
+ }
+ fill(initval);
+}
+
+<T>XPlex::<T>XPlex(const <T>XPlex& a)
+{
+ lo = a.lo;
+ fnc = a.fnc;
+ csize = a.csize;
+ make_initial_chunks();
+ for (int i = a.low(); i < a.fence(); a.next(i)) (*this)[i] = a[i];
+}
+
+void <T>XPlex::operator= (const <T>XPlex& a)
+{
+ if (&a != this)
+ {
+ invalidate();
+ lo = a.lo;
+ fnc = a.fnc;
+ csize = a.csize;
+ make_initial_chunks();
+ for (int i = a.low(); i < a.fence(); a.next(i)) (*this)[i] = a[i];
+ }
+}
+
+
+void <T>XPlex::cache(int idx) const
+{
+ const <T>IChunk* tail = tl();
+ const <T>IChunk* t = ch;
+ while (idx >= t->fence_index())
+ {
+ if (t == tail) index_error();
+ t = (t->next());
+ }
+ while (idx < t->low_index())
+ {
+ if (t == hd) index_error();
+ t = (t->prev());
+ }
+ set_cache(t);
+}
+
+
+void <T>XPlex::cache(const <T>* p) const
+{
+ const <T>IChunk* old = ch;
+ const <T>IChunk* t = ch;
+ while (!t->actual_pointer(p))
+ {
+ t = (t->next());
+ if (t == old) index_error();
+ }
+ set_cache(t);
+}
+
+int <T>XPlex::owns(Pix px) const
+{
+ <T>* p = (<T>*)px;
+ const <T>IChunk* old = ch;
+ const <T>IChunk* t = ch;
+ while (!t->actual_pointer(p))
+ {
+ t = (t->next());
+ if (t == old) { set_cache(t); return 0; }
+ }
+ set_cache(t);
+ return 1;
+}
+
+
+<T>* <T>XPlex::dosucc(const <T>* p) const
+{
+ if (p == 0) return 0;
+ const <T>IChunk* old = ch;
+ const <T>IChunk* t = ch;
+
+ while (!t->actual_pointer(p))
+ {
+ t = (t->next());
+ if (t == old) return 0;
+ }
+ int i = t->index_of(p) + 1;
+ if (i >= fnc) return 0;
+ if (i >= t->fence_index()) t = (t->next());
+ set_cache(t);
+ return (t->pointer_to(i));
+}
+
+<T>* <T>XPlex::dopred(const <T>* p) const
+{
+ if (p == 0) return 0;
+ const <T>IChunk* old = ch;
+ const <T>IChunk* t = ch;
+ while (!t->actual_pointer(p))
+ {
+ t = (t->prev());
+ if (t == old) return 0;
+ }
+ int i = t->index_of(p) - 1;
+ if (i < lo) return 0;
+ if (i < t->low_index()) t = (t->prev());
+ set_cache(t);
+ return (t->pointer_to(i));
+}
+
+
+int <T>XPlex::add_high(const <T&> elem)
+{
+ <T>IChunk* t = tl();
+ if (!t->can_grow_high())
+ {
+ if (t-><T>IChunk::empty() && one_chunk())
+ t->clear(fnc);
+ else
+ {
+ <T>* data = new <T> [csize];
+ t = (new <T>IChunk(data, fnc, fnc, fnc,fnc+csize));
+ t->link_to_prev(tl());
+ }
+ }
+ *((t-><T>IChunk::grow_high())) = elem;
+ set_cache(t);
+ return fnc++;
+}
+
+int <T>XPlex::del_high ()
+{
+ if (empty()) empty_error();
+ <T>IChunk* t = tl();
+ t-><T>IChunk::shrink_high();
+ if (t-><T>IChunk::empty() && !one_chunk())
+ {
+ <T>IChunk* pred = t->prev();
+ del_chunk(t);
+ t = pred;
+ }
+ set_cache(t);
+ return --fnc - 1;
+}
+
+int <T>XPlex::add_low (const <T&> elem)
+{
+ <T>IChunk* t = hd;
+ if (!t->can_grow_low())
+ {
+ if (t-><T>IChunk::empty() && one_chunk())
+ t->cleardown(lo);
+ else
+ {
+ <T>* data = new <T> [csize];
+ hd = new <T>IChunk(data, lo-csize, lo, lo, lo);
+ hd->link_to_next(t);
+ t = hd;
+ }
+ }
+ *((t-><T>IChunk::grow_low())) = elem;
+ set_cache(t);
+ return --lo;
+}
+
+
+int <T>XPlex::del_low ()
+{
+ if (empty()) empty_error();
+ <T>IChunk* t = hd;
+ t-><T>IChunk::shrink_low();
+ if (t-><T>IChunk::empty() && !one_chunk())
+ {
+ hd = t->next();
+ del_chunk(t);
+ t = hd;
+ }
+ set_cache(t);
+ return ++lo;
+}
+
+void <T>XPlex::reverse()
+{
+ <T> tmp;
+ int l = lo;
+ int h = fnc - 1;
+ <T>IChunk* loch = hd;
+ <T>IChunk* hich = tl();
+ while (l < h)
+ {
+ <T>* lptr = loch->pointer_to(l);
+ <T>* hptr = hich->pointer_to(h);
+ tmp = *lptr;
+ *lptr = *hptr;
+ *hptr = tmp;
+ if (++l >= loch->fence_index()) loch = loch->next();
+ if (--h < hich->low_index()) hich = hich->prev();
+ }
+}
+
+void <T>XPlex::fill(const <T&> x)
+{
+ for (int i = lo; i < fnc; ++i) (*this)[i] = x;
+}
+
+void <T>XPlex::fill(const <T&> x, int l, int hi)
+{
+ for (int i = l; i <= hi; ++i) (*this)[i] = x;
+}
+
+
+void <T>XPlex::clear()
+{
+ if (fnc != lo)
+ {
+ <T>IChunk* t = tl();
+ while (t != hd)
+ {
+ <T>IChunk* prv = t->prev();
+ del_chunk(t);
+ t = prv;
+ }
+ t-><T>IChunk::clear(lo);
+ set_cache(t);
+ fnc = lo;
+ }
+}
+
+
+int <T>XPlex::OK () const
+{
+ int v = hd != 0 && ch != 0; // at least one chunk
+
+ v &= fnc == tl()->fence_index();// last chunk fence == plex fence
+ v &= lo == ((hd))-><T>IChunk::low_index(); // first lo == plex lo
+
+// loop for others:
+ int found_ch = 0; // to make sure ch is in list;
+ const <T>IChunk* t = (hd);
+ for (;;)
+ {
+ if (t == ch) ++found_ch;
+ v &= t-><T>IChunk::OK(); // each chunk is OK
+ if (t == tl())
+ break;
+ else // and has indices contiguous to succ
+ {
+ v &= t->top_index() == t->next()->base_index();
+ if (t != hd) // internal chunks full
+ {
+ v &= !t->empty();
+ v &= !t->can_grow_low();
+ v &= !t->can_grow_high();
+ }
+ t = t->next();
+ }
+ }
+ v &= found_ch == 1;
+ if (!v) error("invariant failure");
+ return v;
+}
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