Dogcows Code - chaz/yoink/blob - src/stlplus/persistence/persistent_vector.cpp

   1 ////////////////////////////////////////////////////////////////////////////////
   2
   3 //   Author:    Andy Rushton
   4 //   Copyright: (c) Southampton University 1999-2004
   5 //              (c) Andy Rushton           2004-2009
   6 //   License:   BSD License, see ../docs/license.html
   7
   8 ////////////////////////////////////////////////////////////////////////////////
   9 #include "persistent_vector.hpp"
  10
  11 ////////////////////////////////////////////////////////////////////////////////
  12 // specialisation for a vector of bool which has a different implementation to a vector of anything else
  13
  14 void stlplus::dump_vector_bool(stlplus::dump_context& context, const std::vector<bool>& data)
  15   throw(stlplus::persistent_dump_failed)
  16 {
  17   stlplus::dump_unsigned(context,data.size());
  18   unsigned size = data.size();
  19   unsigned bytes = ((size + 7) / 8);
  20   for (unsigned b = 0; b < bytes; b++)
  21   {
  22     unsigned char byte = 0;
  23     unsigned char mask = 1;
  24     for (unsigned e = 0; e < 8; e++)
  25     {
  26       unsigned i = b*8 + e;
  27       if (i >= size) break;
  28       if (data[i]) byte |= mask;
  29       mask <<= 1;
  30     }
  31     context.put(byte);
  32   }
  33 }
  34
  35 void stlplus::restore_vector_bool(stlplus::restore_context& context, std::vector<bool>& data)
  36   throw(stlplus::persistent_restore_failed)
  37 {
  38   unsigned size = 0;
  39   stlplus::restore_unsigned(context,size);
  40   data.resize(size);
  41   unsigned bytes = ((size + 7) / 8);
  42   for (unsigned b = 0; b < bytes; b++)
  43   {
  44     unsigned char byte = context.get();
  45     unsigned char mask = 1;
  46     for (unsigned e = 0; e < 8; e++)
  47     {
  48       unsigned i = b*8 + e;
  49       if (i >= size) break;
  50       data[i] = ((byte & mask) != 0);
  51       mask <<= 1;
  52     }
  53   }
  54 }
  55
  56 ////////////////////////////////////////////////////////////////////////////////