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//-----------------------------------------------------------------------------
/** @file libpentobi_base/TreeUtil.cpp
@author Markus Enzenberger
@copyright GNU General Public License version 3 or later */
//-----------------------------------------------------------------------------
#include "TreeUtil.h"
namespace libpentobi_base {
//-----------------------------------------------------------------------------
const SgfNode* get_move_node(const PentobiTree& tree, const SgfNode& node,
unsigned n)
{
auto move_number = get_move_number(tree, node);
if (n == move_number)
return &node;
if (n < move_number)
{
auto current = &node;
do
{
if (tree.has_move(*current))
{
if (move_number == n)
return current;
--move_number;
}
if (libpentobi_base::has_setup(*current))
break;
current = current->get_parent_or_null();
}
while (current != nullptr);
}
else
{
auto current = node.get_first_child_or_null();
while (current != nullptr)
{
if (libpentobi_base::has_setup(*current))
break;
if (tree.has_move(*current))
{
++move_number;
if (move_number == n)
return current;
}
current = current->get_first_child_or_null();
}
}
return nullptr;
}
unsigned get_move_number(const PentobiTree& tree, const SgfNode& node)
{
unsigned move_number = 0;
auto current = &node;
do
{
if (tree.has_move(*current))
++move_number;
if (libpentobi_base::has_setup(*current))
break;
current = current->get_parent_or_null();
}
while (current != nullptr);
return move_number;
}
unsigned get_moves_left(const PentobiTree& tree, const SgfNode& node)
{
unsigned moves_left = 0;
auto current = node.get_first_child_or_null();
while (current != nullptr)
{
if (libpentobi_base::has_setup(*current))
break;
if (tree.has_move(*current))
++moves_left;
current = current->get_first_child_or_null();
}
return moves_left;
}
//-----------------------------------------------------------------------------
} // namespace libpentobi_base
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