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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 GNU CC.
-
- GNU CC is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY. No author or distributor
- accepts responsibility to anyone for the consequences of using it
- or for whether it serves any particular purpose or works at all,
- unless he says so in writing. Refer to the GNU CC General Public
- License for full details.
-
- Everyone is granted permission to copy, modify and redistribute
- GNU CC, but only under the conditions described in the
- GNU CC General Public License. A copy of this license is
- supposed to have been given to you along with GNU CC so you
- can know your rights and responsibilities. It should be in a
- file named COPYING. Among other things, the copyright notice
- and this notice must be preserved on all copies.
- */
-
- #include <builtin.h>
- #include "<T>.Set.h"
-
-
- // non-implemented virtuals
- // these are defined to do nonsensical but type-legal things
- // They need to be defined in order to fill the vtable
-
- Pix <T>Set::add(<T&>) { error("unimplemented"); return 0; }
- void <T>Set::del(<T&>) { error("unimplemented"); }
- Pix <T>Set::first() { error("unimplemented"); return 0; }
- void <T>Set::next(Pix&) { error("unimplemented"); }
- <T>& <T>Set::operator()(Pix) { error("unimplemented"); return *((<T>*)0); }
- int <T>Set::OK() { error("unimplemented"); return 0; }
-
- 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(char* msg)
- {
- (*lib_error_handler)("Set", msg);
- }
-