NetBSD/gnu/lib/libg++/include/gen/defs.hP

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1996-03-09 03:00:51 +03:00
// 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.
*/
#ifndef _<T>defs_h
#define _<T>defs_h 1
// equality operator
#ifndef <T>EQ
#define <T>EQ(a, b) ((a) == (b))
#endif
// less-than-or-equal
#ifndef <T>LE
#define <T>LE(a, b) ((a) <= (b))
#endif
// comparison : less-than -> < 0; equal -> 0; greater-than -> > 0
#ifndef <T>CMP
#define <T>CMP(a, b) ( ((a) <= (b))? (((a) == (b))? 0 : -1) : 1 )
#endif
// hash function
#ifndef <T>HASH
extern unsigned int hash(<T&>);
#define <T>HASH(x) hash(x)
#endif
// initial capacity for structures requiring one
#ifndef DEFAULT_INITIAL_CAPACITY
#define DEFAULT_INITIAL_CAPACITY 100
#endif
// HASHTABLE_TOO_CROWDED(COUNT, SIZE) is true iff a hash table with COUNT
// elements and SIZE slots is too full, and should be resized.
// This is so if available space is less than 1/8.
#define HASHTABLE_TOO_CROWDED(COUNT, SIZE) ((SIZE) - ((SIZE) >> 3) <= (COUNT))
#endif