date and time conversion to EPOCH seconds

[Rajmohan]

Hi All,

I can convert a current time in time_t form to user understandable form
using the apis - time, gmtime and strftime.

How can i convert in the reverse way? ie take a time and date string in the
form "Thu, 21 Feb 2002 13:02:03 GMT" and convert into time_t seconds? Is
there any c library api available for accomplishing this?

Thanks in advance,

regards,
Rajmohan

 

[Jun Woong]

Hi All,

I can convert a current time in time_t form to user understandable form
using the apis - time, gmtime and strftime.

How can i convert in the reverse way? ie take a time and date string in the
form "Thu, 21 Feb 2002 13:02:03 GMT" and convert into time_t seconds? Is
there any c library api available for accomplishing this?

You can convert the tm structure to the time_t value by using
mktime(); you can also do the time arithmetic with it. But there is
no standard function to convert a string to the time_t value or the
tm structure; some implementations provide a non-portable function for
that purpose as an extension. Use it if any, or make yours if none or
it doesn't taste to yours.

 

[Mark McIntyre]

Richard,

Thanks a lot. But none of the routines - strptime/partime/getdate are
available on Win32 platform. Could u please point to links for win32...

simplest way with a format like that would be to parse it yourself
into a struct tm. Should take about 30 mins to write the code, faster
than searching the web.