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//-----------------------------------------------------------------------------
/** @file libboardgame_gtp/CmdLine.h
@author Markus Enzenberger
@copyright GNU General Public License version 3 or later */
//-----------------------------------------------------------------------------
#ifndef LIBBOARDGAME_GTP_CMDLINE_H
#define LIBBOARDGAME_GTP_CMDLINE_H
#include <cassert>
#include <iostream>
#include <string>
#include <string_view>
#include <vector>
namespace libboardgame_gtp {
using namespace std;
//-----------------------------------------------------------------------------
/** Parsed GTP command line.
Only used internally by libboardgame_gtp::Engine. GTP command handlers
query arguments of the command line through the instance of class Arguments
given as a function argument by class Engine to the command handler. */
class CmdLine
{
public:
/** Construct empty command.
@warning An empty command cannot be used, before init() was called.
This constructor exists only to reuse instances. */
CmdLine() = default;
/** Construct with a command line.
@see init() */
explicit CmdLine(const string& line);
~CmdLine();
void init(const string& line);
void init(const CmdLine& c);
const string& get_line() const { return m_line; }
/** Get command name. */
string_view get_name() const { return m_elem[m_idx_name]; }
void write_id(ostream& out) const;
string_view get_trimmed_line_after_elem(unsigned i) const;
const vector<string_view>& get_elements() const { return m_elem; }
const string_view& get_element(unsigned i) const;
unsigned get_idx_name() const { return m_idx_name; }
private:
unsigned m_idx_name;
/** Full command line. */
string m_line;
vector<string_view> m_elem;
void add_elem(string::const_iterator begin, string::const_iterator end);
void find_elem();
void parse_id();
};
inline const string_view& CmdLine::get_element(unsigned i) const
{
assert(i < m_elem.size());
return m_elem[i];
}
inline void CmdLine::write_id(ostream& out) const
{
if (m_idx_name != 0)
out << m_elem[0];
}
//-----------------------------------------------------------------------------
} // namespace libboardgame_gtp
#endif // LIBBOARDGAME_GTP_CMDLINE_H
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