## modules/up/src/rpsl/gnu/SymID.Set.cc

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## FUNCTIONS

This source file includes following functions.

1. seek
2. owns
3. clear
4. contains
5. error

       1 // This may look like C code, but it is really -*- C++ -*-
       2 /*
       3 Copyright (C) 1988 Free Software Foundation
       4     written by Doug Lea (dl@rocky.oswego.edu)
       5
       6 This file is part of the GNU C++ Library.  This library is free
       7 software; you can redistribute it and/or modify it under the terms of
       8 the GNU Library General Public License as published by the Free
       9 Software Foundation; either version 2 of the License, or (at your
      10 option) any later version.  This library is distributed in the hope
      11 that it will be useful, but WITHOUT ANY WARRANTY; without even the
      12 implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
      13 PURPOSE.  See the GNU Library General Public License for more details.
      14 You should have received a copy of the GNU Library General Public
      15 License along with this library; if not, write to the Free Software
      16 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
      17 */
      18
      19 #ifdef __GNUG__
      20 #pragma implementation
      21 #endif
      22 #include "config.h"
      23 #include <builtin.h>
      24 #include "SymID.Set.h"
      25
      26
      27 Pix SymIDSet::seek(SymID  item) const
         /* [<][>][^][v][top][bottom][index][help] */
      28 {
      29   Pix i;
      30   for (i = first(); i != 0 && !(SymIDEQ((*this)(i), item)); next(i));
      31   return i;
      32 }
      33
      34 int SymIDSet::owns(Pix idx)
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      35 {
      36   if (idx == 0) return 0;
      37   for (Pix i = first(); i; next(i)) if (i == idx) return 1;
      38   return 0;
      39 }
      40
      41 void SymIDSet::clear()
         /* [<][>][^][v][top][bottom][index][help] */
      42 {
      43   Pix i = first();
      44   while (i != 0)
      45   {
      46     del((*this)(i));
      47     i = first();
      48   }
      49 }
      50
      51 int SymIDSet::contains (SymID  item) const
         /* [<][>][^][v][top][bottom][index][help] */
      52 {
      53   return seek(item) != 0;
      54 }
      55
      56 int SymIDSet::operator <= (const SymIDSet& b) const
      57 {
      58   if (count > b.count) return 0;
      59   if (count == 0) return 1;
      60   for (Pix i = first(); i; next(i)) if (b.seek((*this)(i)) == 0) return 0;
      61   return 1;
      62 }
      63
      64 int SymIDSet::operator == (const SymIDSet& b) const
      65 {
      66   int n = count;
      67   if (n != b.count) return 0;
      68   if (n == 0) return 1;
      69   Pix i = first();
      70   Pix j = b.first();
      71   while (n-- > 0)
      72   {
      73     if ((b.seek((*this)(i)) == 0) || (seek(b(j)) == 0)) return 0;
      74     next(i);
      75     b.next(j);
      76   }
      77   return 1;
      78 }
      79
      80 int SymIDSet::operator != (const SymIDSet& b) const
      81 {
      82   return !(*this == b);
      83 }
      84
      85 void SymIDSet::operator |= (SymIDSet& b)
      86 {
      87   if (&b != this)
      88     for (Pix i = b.first(); i; b.next(i)) add(b(i));
      89 }
      90
      91 void SymIDSet::operator -= (SymIDSet& b)
      92 {
      93   if (&b == this)
      94     clear();
      95   else
      96     for (Pix i = b.first(); i; b.next(i)) del(b(i));
      97 }
      98
      99
     100 void SymIDSet::operator &= (SymIDSet& b)
     101 {
     102   if (&b != this)
     103   {
     104     Pix i = first();
     105     Pix n = i;
     106     while (i != 0)
     107     {
     108       next(n);
     109       if (b.seek((*this)(i)) == 0) del((*this)(i));
     110       i = n;
     111     }
     112   }
     113 }
     114
     115 void SymIDSet::error(const char* msg) const
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     116 {
     117   (*lib_error_handler)("Set", msg);
     118 }

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