constants.hpp

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#pragma once
#ifndef _TIME_SHIELD_CONSTANTS_HPP_INCLUDED
#define _TIME_SHIELD_CONSTANTS_HPP_INCLUDED
 
#include <cstdint>
#include <limits>
 
namespace time_shield {
 
    // Nanoseconds and microseconds
    constexpr int64_t NS_PER_US     = 1000;         
    constexpr int64_t NS_PER_MS     = 1000000;      
    constexpr int64_t NS_PER_SEC    = 1000000000;   
 
    // Microseconds and milliseconds
    constexpr int64_t US_PER_SEC        = 1000000;  
    constexpr int64_t MS_PER_SEC        = 1000;     
    constexpr int64_t MS_PER_MIN        = 60000;    
    constexpr int64_t MS_PER_HALF_HOUR  = 1800000;  
    constexpr int64_t MS_PER_HOUR       = 3600000;  
    constexpr int64_t MS_PER_DAY        = 86400000; 
 
    // Seconds
    constexpr int64_t SEC_PER_MIN       = 60;       
    constexpr int64_t SEC_PER_HALF_HOUR = 1800;     
    constexpr int64_t SEC_PER_HOUR      = 3600;     
    constexpr int64_t SEC_PER_DAY       = 86400;    
    constexpr int64_t SEC_PER_YEAR      = 31536000; 
    constexpr int64_t AVG_SEC_PER_YEAR  = 31557600; 
    constexpr int64_t SEC_PER_LEAP_YEAR = 31622400; 
    constexpr int64_t SEC_PER_4_YEARS   = 126230400;
    constexpr int64_t SEC_PER_FIRST_100_YEARS = 3155760000; 
    constexpr int64_t SEC_PER_100_YEARS = 3155673600;   
    constexpr int64_t SEC_PER_400_YEARS = 12622780800;  
    constexpr int64_t MAX_SEC_PER_DAY   = 86399;    
 
    // Minutes
    constexpr int64_t MIN_PER_HOUR      = 60;       
    constexpr int64_t MIN_PER_DAY       = 1440;     
    constexpr int64_t MIN_PER_WEEK      = 10080;    
    constexpr int64_t MIN_PER_MONTH     = 40320;    
    constexpr int64_t MAX_MOON_MIN      = 42523;    
 
    // Hours and days
    constexpr int64_t HOURS_PER_DAY     = 24;       
    constexpr int64_t DAYS_PER_WEEK     = 7;        
    constexpr int64_t DAYS_PER_LEAP_YEAR = 366;     
    constexpr int64_t DAYS_PER_YEAR     = 365;      
    constexpr int64_t DAYS_PER_4_YEARS  = 1461;     
 
    // Months and years
    const int64_t MONTHS_PER_YEAR       = 12;       
    const int64_t MAX_DAYS_PER_MONTH    = 31;       
    const int64_t LEAP_YEAR_PER_100_YEAR = 24;      
    const int64_t LEAP_YEAR_PER_400_YEAR = 97;      
 
    // Epoch and maximum values
    constexpr int64_t UNIX_EPOCH        = 1970;     
    constexpr int64_t OLE_EPOCH         = 25569;    
    constexpr int64_t MAX_YEAR          = 292277022000LL;   
    constexpr int64_t MIN_YEAR          = -2967369602200LL; 
    constexpr int64_t ERROR_YEAR        = 9223372036854770000LL; 
    constexpr int64_t MAX_TIMESTAMP     = 9223371890843040000LL; 
    constexpr int64_t ERROR_TIMESTAMP   = 9223372036854770000LL; 
    constexpr double MAX_OADATE         = std::numeric_limits<double>::max();   
    constexpr double AVG_DAYS_PER_YEAR  = 365.25;   
 
}; // namespace time_shield
 
#endif // _TIME_SHIELD_CONSTANTS_HPP_INCLUDED