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// license:BSD-3-Clause
// copyright-holders:Nicola Salmoria
/*************************************************************************
xtal.h
Documentation and consistent naming for known existing crystals.
See the .cpp file for details
***************************************************************************/
#ifndef MAME_EMU_DRIVERS_XTAL_H
#define MAME_EMU_DRIVERS_XTAL_H
#pragma once
class XTAL {
public:
constexpr XTAL(double base_clock) : m_base_clock(base_clock), m_current_clock(base_clock) {}
constexpr double dvalue() const noexcept { return m_current_clock; }
constexpr u32 value() const noexcept { return u32(m_current_clock); }
constexpr double base() const noexcept { return m_base_clock; }
constexpr XTAL operator *(int mult) const noexcept { return XTAL(m_base_clock, m_current_clock * mult); }
constexpr XTAL operator *(unsigned int mult) const noexcept { return XTAL(m_base_clock, m_current_clock * mult); }
constexpr XTAL operator *(double mult) const noexcept { return XTAL(m_base_clock, m_current_clock * mult); }
constexpr XTAL operator /(int div) const noexcept { return XTAL(m_base_clock, m_current_clock / div); }
constexpr XTAL operator /(unsigned int div) const noexcept { return XTAL(m_base_clock, m_current_clock / div); }
constexpr XTAL operator /(double div) const noexcept { return XTAL(m_base_clock, m_current_clock / div); }
friend constexpr XTAL operator /(int div, const XTAL &xtal);
friend constexpr XTAL operator /(unsigned int div, const XTAL &xtal);
friend constexpr XTAL operator /(double div, const XTAL &xtal);
friend constexpr XTAL operator *(int mult, const XTAL &xtal);
friend constexpr XTAL operator *(unsigned int mult, const XTAL &xtal);
friend constexpr XTAL operator *(double mult, const XTAL &xtal);
void check(const char *message) const;
void check(const std::string &message) const;
private:
double m_base_clock, m_current_clock;
constexpr XTAL(double base_clock, double current_clock) noexcept : m_base_clock(base_clock), m_current_clock(current_clock) {}
static const double known_xtals[];
static double last_correct_value, xtal_error_low, xtal_error_high;
static void fail(double base_clock, std::string message);
static bool check(double base_clock);
static void check_ordering();
};
inline constexpr XTAL operator /(int div, const XTAL &xtal) { return XTAL(xtal.base(), div / xtal.dvalue()); }
inline constexpr XTAL operator /(unsigned int div, const XTAL &xtal) { return XTAL(xtal.base(), div / xtal.dvalue()); }
inline constexpr XTAL operator /(double div, const XTAL &xtal) { return XTAL(xtal.base(), div / xtal.dvalue()); }
inline constexpr XTAL operator *(int mult, const XTAL &xtal) { return XTAL(xtal.base(), mult * xtal.dvalue()); }
inline constexpr XTAL operator *(unsigned int mult, const XTAL &xtal) { return XTAL(xtal.base(), mult * xtal.dvalue()); }
inline constexpr XTAL operator *(double mult, const XTAL &xtal) { return XTAL(xtal.base(), mult * xtal.dvalue()); }
#endif // MAME_EMU_DRIVERS_XTAL_H
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