metaforce/Runtime/CBasics.hpp

#pragma once

#include <cstdint>
#include <cstdlib>
#include <chrono>

#include "RetroTypes.hpp"

namespace urde
{

using OSTime = s64;

struct OSCalendarTime
{
    int x0_sec;    // seconds after the minute [0, 61]
    int x4_min;    // minutes after the hour [0, 59]
    int x8_hour;   // hours since midnight [0, 23]
    int xc_mday;   // day of the month [1, 31]
    int x10_mon;    // month since January [0, 11]
    int x14_year;   // years in AD [1, ...]
    int x18_wday;   // days since Sunday [0, 6]
    int x1c_yday;   // days since January 1 [0, 365]

    int x20_msec;   // milliseconds after the second [0,999]
    int x24_usec;   // microseconds after the millisecond [0,999]
};

class CBasics
{
public:
    static void Initialize();
    static const char* Stringize(const char* fmt, ...);

    static const u64 SECONDS_TO_2000;
    static const u64 TICKS_PER_SECOND;

    static OSTime ToWiiTime(std::chrono::system_clock::time_point time);
    static std::chrono::system_clock::time_point FromWiiTime(OSTime wiiTime);

    static u64 GetGCTicks();
    static constexpr u64 GetGCTicksPerSec() { return 486000000ull; }

    static OSCalendarTime ToCalendarTime(OSTime time) { return ToCalendarTime(FromWiiTime(time)); }
    static OSCalendarTime ToCalendarTime(std::chrono::system_clock::time_point time);
};

}