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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)
-
- 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 <builtin.h>
- #include "<T>.Set.h"
-
-
- Pix <T>Set::seek(<T&> item)
- {
- for (Pix i = first(); i != 0 && !(<T>EQ((*this)(i), item)); next(i));
- return i;
- }
-
- int <T>Set::owns(Pix idx)
- {
- if (idx == 0) return 0;
- for (Pix i = first(); i; next(i)) if (i == idx) return 1;
- return 0;
- }
-
- void <T>Set::clear()
- {
- Pix i = first();
- while (i != 0)
- {
- del((*this)(i));
- i = first();
- }
- }
-
- int <T>Set::contains (<T&> item)
- {
- return seek(item) != 0;
- }
-
- int <T>Set::operator <= (<T>Set& b)
- {
- if (count > b.count) return 0;
- if (count == 0) return 1;
- for (Pix i = first(); i; next(i)) if (b.seek((*this)(i)) == 0) return 0;
- return 1;
- }
-
- int <T>Set::operator == (<T>Set& b)
- {
- int n = count;
- if (n != b.count) return 0;
- if (n == 0) return 1;
- Pix i = first();
- Pix j = b.first();
- while (n-- > 0)
- {
- if ((b.seek((*this)(i)) == 0) || (seek(b(j)) == 0)) return 0;
- next(i);
- b.next(j);
- }
- return 1;
- }
-
- int <T>Set::operator != (<T>Set& b)
- {
- return !(*this == b);
- }
-
- void <T>Set::operator |= (<T>Set& b)
- {
- if (&b != this)
- for (Pix i = b.first(); i; b.next(i)) add(b(i));
- }
-
- void <T>Set::operator -= (<T>Set& b)
- {
- if (&b == this)
- clear();
- else
- for (Pix i = b.first(); i; b.next(i)) del(b(i));
- }
-
-
- void <T>Set::operator &= (<T>Set& b)
- {
- if (&b != this)
- {
- Pix i = first();
- Pix n = i;
- while (i != 0)
- {
- next(n);
- if (b.seek((*this)(i)) == 0) del((*this)(i));
- i = n;
- }
- }
- }
-
- void <T>Set::error(const char* msg)
- {
- (*lib_error_handler)("Set", msg);
- }
-