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// -*- Mode: C++; tab-width: 2; -*-
// vi: set ts=2:
//
// $Id: enumerator.C,v 1.14 2003/08/26 09:17:44 oliver Exp $
//
#include <BALL/COMMON/global.h>
#include <BALL/COMMON/exception.h>
#include <BALL/DATATYPE/string.h>
#include <BALL/CONCEPT/enumerator.h>
#include <algorithm>
#include <functional>
namespace BALL
{
EnumeratorIndex::IncompatibleIndex::IncompatibleIndex
(const char* file, int line)
: Exception::GeneralException(file, line, "IncompatibleIndex", "")
{
message_ = "different enumerator moduli occurred.";
Exception::globalHandler.setMessage(message_);
}
EnumeratorIndex::EnumeratorIndex()
: vector<Position>(),
modulus_(),
base_multipliers_()
{
}
EnumeratorIndex::~EnumeratorIndex()
{
}
EnumeratorIndex& EnumeratorIndex::operator ++ ()
{
Index i;
bool add_one = true;
for (i = (Index) size() - 1; (i >= 0) && add_one; i--)
{
operator[](i)++;
add_one = false;
if ((operator[](i)) >= modulus_[i])
{
operator[](i) = 0;
add_one = true;
}
}
if (add_one)
{
throw Exception::IndexOverflow(__FILE__, __LINE__);
}
return *this;
}
EnumeratorIndex& EnumeratorIndex::operator -- ()
{
Index i;
bool sub_one = true;
for (i = (Index)size() - 1; (i >= 0) && sub_one; i--)
{
if (operator[](i) == 0)
{
operator[](i) = modulus_[i] - 1;
}
else
{
operator[](i)--;
sub_one = false;
}
}
if (sub_one)
{
throw Exception::IndexUnderflow(__FILE__, __LINE__);
}
return *this;
}
const EnumeratorIndex& EnumeratorIndex::operator = (const EnumeratorIndex& rhs)
{
std::vector<Position>::operator = (rhs);
modulus_ = rhs.modulus_;
base_multipliers_ = rhs.base_multipliers_;
return *this;
}
const EnumeratorIndex& EnumeratorIndex::operator = (Position index)
{
for (Position i = 0; i < std::vector<Position>::size(); ++i)
{
Position digit = index / base_multipliers_[i];
if (digit >= modulus_[i])
{
throw Exception::IndexOverflow(__FILE__, __LINE__, index);
}
std::vector<Position>::operator[](i) = digit;
index -= base_multipliers_[i] * digit;
}
return *this;
}
EnumeratorIndex& EnumeratorIndex::operator << (Size modulus)
{
// there's no point in counting in the unary system or below
if (modulus < 2)
{
throw Exception::OutOfRange(__FILE__, __LINE__);
}
// initialize the new digit
std::vector<Position>::push_back(0);
// update the modulus array
modulus_.push_back(modulus);
// transform the multipliers for each digit (by multiplying
// the old contents with the new modulus and adding a one
// for the new digit)
std::transform(base_multipliers_.begin(), base_multipliers_.end(),
base_multipliers_.begin(),
std::bind2nd(std::multiplies<Position>(), modulus));
base_multipliers_.push_back(1);
return *this;
}
bool EnumeratorIndex::operator == (const EnumeratorIndex& rhs) const
{
return (modulus_ == rhs.modulus_) && (static_cast<const vector<Position>&>(*this) == static_cast<const vector<Position>&>(rhs));
}
bool EnumeratorIndex::operator != (const EnumeratorIndex& rhs) const
{
return (modulus_ != rhs.modulus_) || (static_cast<const vector<Position>&>(*this) != static_cast<const vector<Position>&>(rhs));
}
bool EnumeratorIndex::operator < (const EnumeratorIndex& rhs) const
{
if (modulus_ != rhs.modulus_)
{
throw EnumeratorIndex::IncompatibleIndex(__FILE__, __LINE__);
}
return (static_cast<const vector<Position>&>(*this) < static_cast<const vector<Position>&>(rhs));
}
bool EnumeratorIndex::operator > (const EnumeratorIndex& rhs) const
{
if (modulus_ != rhs.modulus_)
{
throw EnumeratorIndex::IncompatibleIndex(__FILE__, __LINE__);
}
return (static_cast<const vector<Position>&>(*this) > static_cast<const vector<Position>&>(rhs));
}
bool EnumeratorIndex::operator <= (const EnumeratorIndex& rhs) const
{
if (modulus_ != rhs.modulus_)
{
throw EnumeratorIndex::IncompatibleIndex(__FILE__, __LINE__);
}
return (static_cast<const vector<Position>&>(*this) <= static_cast<const vector<Position>&>(rhs));
}
bool EnumeratorIndex::operator >= (const EnumeratorIndex& rhs) const
{
if (modulus_ != rhs.modulus_)
{
throw EnumeratorIndex::IncompatibleIndex(__FILE__, __LINE__);
}
return (static_cast<const vector<Position>&>(*this) >= static_cast<const vector<Position>&>(rhs));
}
# ifdef BALL_NO_INLINE_FUNCTIONS
# include <BALL/CONCEPT/enumerator.iC>
# endif
}
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