campo-sirio/include/stack.cpp

#include <stack.h>

TStack::TStack(int size) : _data(size), _sp(0)
{}

void TStack::push(const TObject& o)
{
  _data.add(o, _sp++);
}

void TStack::push(TObject* o)
{
  _data.add(o, _sp++);
}

TObject& TStack::pop()
{
  CHECK(_sp > 0, "Stack underflow!");
  return _data[--_sp];
}

TObject& TStack::peek(int depth) const
{
  CHECKD(depth >= 0 && depth < _sp, "Stack depth error: ", depth);
  return _data[_sp-depth-1];
}

bool TStack::destroy_base()
{
  if (_sp > 0) _sp--;
  return _data.destroy(0, TRUE);
}