322 lines
5.5 KiB
COBOL
322 lines
5.5 KiB
COBOL
// 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)
|
|
|
|
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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#ifdef __GNUG__
|
|
#pragma implementation
|
|
#endif
|
|
#include "<T>.OSLSet.h"
|
|
|
|
|
|
Pix <T>OSLSet::seek(<T&> item)
|
|
{
|
|
for (Pix i = p.first(); i != 0; p.next(i))
|
|
{
|
|
int cmp = <T>CMP(item, p(i));
|
|
if (cmp == 0)
|
|
return i;
|
|
else if (cmp < 0)
|
|
return 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
Pix <T>OSLSet::add(<T&> item)
|
|
{
|
|
Pix i = p.first();
|
|
if (i == 0)
|
|
{
|
|
++count;
|
|
return p.prepend(item);
|
|
}
|
|
int cmp = <T>CMP(item, p(i));
|
|
if (cmp == 0)
|
|
return i;
|
|
else if (cmp < 0)
|
|
{
|
|
++count;
|
|
return p.prepend(item);
|
|
}
|
|
else
|
|
{
|
|
Pix trail = i;
|
|
p.next(i);
|
|
for (;;)
|
|
{
|
|
if (i == 0)
|
|
{
|
|
++count;
|
|
return p.append(item);
|
|
}
|
|
cmp = <T>CMP(item, p(i));
|
|
if (cmp == 0)
|
|
return i;
|
|
else if (cmp < 0)
|
|
{
|
|
++count;
|
|
return p.ins_after(trail, item);
|
|
}
|
|
else
|
|
{
|
|
trail = i;
|
|
p.next(i);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void <T>OSLSet::del(<T&> item)
|
|
{
|
|
Pix i = p.first();
|
|
if (i == 0)
|
|
return;
|
|
int cmp = <T>CMP(item, p(i));
|
|
if (cmp < 0)
|
|
return;
|
|
else if (cmp == 0)
|
|
{
|
|
--count;
|
|
p.del_front();
|
|
}
|
|
else
|
|
{
|
|
Pix trail = i;
|
|
p.next(i);
|
|
while (i != 0)
|
|
{
|
|
cmp = <T>CMP(item, p(i));
|
|
if (cmp < 0)
|
|
return;
|
|
else if (cmp == 0)
|
|
{
|
|
--count;
|
|
p.del_after(trail);
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
trail = i;
|
|
p.next(i);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
int <T>OSLSet::operator <= (<T>OSLSet& b)
|
|
{
|
|
if (count > b.count) return 0;
|
|
Pix i = first();
|
|
Pix j = b.first();
|
|
for (;;)
|
|
{
|
|
if (i == 0)
|
|
return 1;
|
|
else if (j == 0)
|
|
return 0;
|
|
int cmp = <T>CMP(p(i), b.p(j));
|
|
if (cmp == 0)
|
|
{
|
|
next(i); b.next(j);
|
|
}
|
|
else if (cmp < 0)
|
|
return 0;
|
|
else
|
|
b.next(j);
|
|
}
|
|
}
|
|
|
|
int <T>OSLSet::operator == (<T>OSLSet& b)
|
|
{
|
|
if (count != b.count) return 0;
|
|
if (count == 0) return 1;
|
|
Pix i = p.first();
|
|
Pix j = b.p.first();
|
|
while (i != 0)
|
|
{
|
|
if (!<T>EQ(p(i),b.p(j))) return 0;
|
|
next(i);
|
|
b.next(j);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
|
|
void <T>OSLSet::operator |= (<T>OSLSet& b)
|
|
{
|
|
if (&b == this || b.count == 0)
|
|
return;
|
|
else
|
|
{
|
|
Pix j = b.p.first();
|
|
Pix i = p.first();
|
|
Pix trail = 0;
|
|
for (;;)
|
|
{
|
|
if (j == 0)
|
|
return;
|
|
else if (i == 0)
|
|
{
|
|
for (; j != 0; b.next(j))
|
|
{
|
|
++count;
|
|
p.append(b.p(j));
|
|
}
|
|
return;
|
|
}
|
|
int cmp = <T>CMP(p(i), b.p(j));
|
|
if (cmp <= 0)
|
|
{
|
|
if (cmp == 0) b.next(j);
|
|
trail = i;
|
|
next(i);
|
|
}
|
|
else
|
|
{
|
|
++count;
|
|
if (trail == 0)
|
|
trail = p.prepend(b.p(j));
|
|
else
|
|
trail = p.ins_after(trail, b.p(j));
|
|
b.next(j);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void <T>OSLSet::operator -= (<T>OSLSet& b)
|
|
{
|
|
if (&b == this)
|
|
clear();
|
|
else if (count != 0 && b.count != 0)
|
|
{
|
|
Pix i = p.first();
|
|
Pix j = b.p.first();
|
|
Pix trail = 0;
|
|
for (;;)
|
|
{
|
|
if (j == 0 || i == 0)
|
|
return;
|
|
int cmp = <T>CMP(p(i), b.p(j));
|
|
if (cmp == 0)
|
|
{
|
|
--count;
|
|
b.next(j);
|
|
if (trail == 0)
|
|
{
|
|
p.del_front();
|
|
i = p.first();
|
|
}
|
|
else
|
|
{
|
|
next(i);
|
|
p.del_after(trail);
|
|
}
|
|
}
|
|
else if (cmp < 0)
|
|
{
|
|
trail = i;
|
|
next(i);
|
|
}
|
|
else
|
|
b.next(j);
|
|
}
|
|
}
|
|
}
|
|
|
|
void <T>OSLSet::operator &= (<T>OSLSet& b)
|
|
{
|
|
if (b.count == 0)
|
|
clear();
|
|
else if (&b != this && count != 0)
|
|
{
|
|
Pix i = p.first();
|
|
Pix j = b.p.first();
|
|
Pix trail = 0;
|
|
for (;;)
|
|
{
|
|
if (i == 0)
|
|
return;
|
|
else if (j == 0)
|
|
{
|
|
if (trail == 0)
|
|
{
|
|
p.clear();
|
|
count = 0;
|
|
}
|
|
else
|
|
{
|
|
while (i != 0)
|
|
{
|
|
--count;
|
|
next(i);
|
|
p.del_after(trail);
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
int cmp = <T>CMP(p(i), b.p(j));
|
|
|
|
if (cmp == 0)
|
|
{
|
|
trail = i;
|
|
next(i);
|
|
b.next(j);
|
|
}
|
|
else if (cmp < 0)
|
|
{
|
|
--count;
|
|
if (trail == 0)
|
|
{
|
|
p.del_front();
|
|
i = p.first();
|
|
}
|
|
else
|
|
{
|
|
next(i);
|
|
p.del_after(trail);
|
|
}
|
|
}
|
|
else
|
|
b.next(j);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
int <T>OSLSet::OK()
|
|
{
|
|
int v = p.OK();
|
|
v &= count == p.length();
|
|
Pix trail = p.first();
|
|
if (trail == 0)
|
|
v &= count == 0;
|
|
else
|
|
{
|
|
Pix i = trail; next(i);
|
|
while (i != 0)
|
|
{
|
|
v &= <T>CMP(p(trail), p(i)) < 0;
|
|
trail = i;
|
|
next(i);
|
|
}
|
|
}
|
|
if (!v) error("invariant failure");
|
|
return v;
|
|
}
|