modules/up/src/gnug++/int.defs.h

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FUNCTIONS

This source file includes following functions.
  1. intEQ
  2. intLE
  3. intCMP
  4. intHASH
  5. HASHTABLE_TOO_CROWDED

   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, 675 Mass Ave, Cambridge, MA 02139, USA.
  17 */
  18 
  19 
  20 #ifndef _intdefs_h
  21 #define _intdefs_h 1
  22 
  23 
  24 // equality operator
  25 #ifndef intEQ
  26 #define intEQ(a, b)  ((a) == (b))
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  27 #endif
  28 
  29 // less-than-or-equal
  30 #ifndef intLE
  31 #define intLE(a, b)  ((a) <= (b))
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  32 #endif
  33 
  34 // comparison : less-than -> < 0; equal -> 0; greater-than -> > 0
  35 #ifndef intCMP
  36 #define intCMP(a, b) ( a - b )
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  37 #endif
  38 
  39 // hash function
  40 #ifndef intHASH
  41 //extern unsigned int hash(int );
  42 #define intHASH(x)  (x)
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  43 #endif
  44 
  45 // initial capacity for structures requiring one
  46 
  47 #ifndef DEFAULT_INITIAL_CAPACITY
  48 #define DEFAULT_INITIAL_CAPACITY 100
  49 #endif
  50 
  51 // HASHTABLE_TOO_CROWDED(COUNT, SIZE) is true iff a hash table with COUNT
  52 // elements and SIZE slots is too full, and should be resized.
  53 // This is so if available space is less than 1/8.
  54 
  55 #define HASHTABLE_TOO_CROWDED(COUNT, SIZE) ((SIZE) - ((SIZE) >> 3) <= (COUNT))
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  56 
  57 #endif

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