lib-src/contain/variset.cc

   1 //////////////////////////////////////////////////////////////////////////////
   2 // NOTICE:
   3 //
   4 // ADLib, Prop and their related set of tools and documentation are in the
   5 // public domain.   The author(s) of this software reserve no copyrights on
   6 // the source code and any code generated using the tools.  You are encouraged
   7 // to use ADLib and Prop to develop software, in both academic and commercial
   8 // settings, and are free to incorporate any part of ADLib and Prop into
   9 // your programs.
  10 //
  11 // Although you are under no obligation to do so, we strongly recommend that
  12 // you give away all software developed using our tools.
  13 //
  14 // We also ask that credit be given to us when ADLib and/or Prop are used in
  15 // your programs, and that this notice be preserved intact in all the source
  16 // code.
  17 //
  18 // This software is still under development and we welcome any suggestions
  19 // and help from the users.
  20 //
  21 // Allen Leung
  22 // 1994
  23 //////////////////////////////////////////////////////////////////////////////
  24
  25 #include <string.h>
  26 #include <stdlib.h>
  27 #include <iostream>
  28 #include <AD/contain/variset.h>
  29
  30 VarIntSet::VarIntSet(size_t init_size, size_t g)
  31    {  limit  = (init_size + sizeof(Glob) * 8 - 1) / (sizeof(Glob) * 8);
  32       growth = g;
  33       array  = new Glob [limit];
  34       memset(array,0,limit * sizeof(Glob));
  35    }
  36 VarIntSet::~VarIntSet() { delete [] array; }
  37
  38 void VarIntSet::grow(size_t new_limit)
  39 {  if (new_limit >= 8*1024*1024)
  40    {  std::cerr << "Limit exceeded in VarIntSet::grow(): " << new_limit << '\n';
  41       exit(1);
  42    }
  43    Glob * a = new Glob [ new_limit ];
  44    memcpy(a,array,limit * sizeof(Glob));
  45    memset(a+limit, 0, (new_limit - limit) * sizeof(Glob));
  46    delete [] array;
  47    array = a;
  48    limit = new_limit;
  49 }