将时间戳转换为MYSQL_TIME

Question

I want to insert unix timestamp into MySQL using C library.

According to MySQL doc , I should use MYSQL_TIME struct, like so:

MYSQL_TIME  ts;

ts.year= 2002;
ts.month= 02;
ts.day= 03;

ts.hour= 10;
ts.minute= 45;
ts.second= 20;

What is the correct way to convert integer value that holds timestamp into this struct?

Is there any solution other than pure parsing of the number?

This is my goal:

std::time_t t = 1534963754;
MYSQL_TIME mysql_time = convert_to_MYSQL_TIME(t);

Answer 1

My approach would be using localtime() which takes timer values in seconds and fills the tm structure. Use tm structure to fill MYSQL_TIME structure.

definition of tm structure is

struct tm {
   int tm_sec;         /* seconds,  range 0 to 59          */
   int tm_min;         /* minutes, range 0 to 59           */
   int tm_hour;        /* hours, range 0 to 23             */
   int tm_mday;        /* day of the month, range 1 to 31  */
   int tm_mon;         /* month, range 0 to 11             */
   int tm_year;        /* The number of years since 1900   */
   int tm_wday;        /* day of the week, range 0 to 6    */
   int tm_yday;        /* day in the year, range 0 to 365  */
   int tm_isdst;       /* daylight saving time             */   
};

And your convert_to_MYSQL_TIME function will look like below.

 MYSQL_TIME  convert_to_MYSQL_TIME(time_t t)
    {
       struct tm * timeinfo;
       MYSQL_TIME sqlTime;

       timeinfo = localtime (&t);
       sqlTime.year = timeinfo.tm_year;
       sqlTime.month = timeinfo.tm_mon;
       sqlTime.day = timeinfo.tm_mday;
       sqlTime.hour = timeinfo.tm_hour;
       sqlTime.minute = timeinfo.tm_min;
       sqlTime.second = timeinfo.tm_sec;

      return sqlTime;
    }