curl_getdate man page on Oracle

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curl_getdate(3)			libcurl Manual		       curl_getdate(3)

       curl_getdate - Convert a date string to number of seconds since January
       1, 1970

       #include <curl/curl.h>

       time_t curl_getdate(char *datestring, time_t *now );

       This function returns the number of seconds since January 1st  1970  in
       the  UTC time zone, for the date and time that the datestring parameter
       specifies. The now parameter is not used, pass a NULL there.

       NOTE: This function was rewritten for the 7.12.2 release and this docu‐
       mentation  covers  the functionality of the new one. The new one is not
       feature-complete with the old one, but most of the formats supported by
       the new one was supported by the old too.

       A  "date" is a string containing several items separated by whitespace.
       The order of the items is immaterial.  A date string may	 contain  many
       flavors of items:

       calendar date items
	       Can  be	specified several ways. Month names can only be three-
	       letter english abbreviations, numbers can be zero-prefixed  and
	       the  year  may  use  2  or  4  digits.	Examples: 06 Nov 1994,
	       06-Nov-94 and Nov-94 6.

       time of the day items
	       This string specifies the time on a given day. You must specify
	       it  with 6 digits with two colons: HH:MM:SS. To not include the
	       time in a date string, will make the function assume  00:00:00.
	       Example: 18:19:21.

       time zone items
	       Specifies  international	 time  zone.  There are a few acronyms
	       supported, but in general you should instead use	 the  specific
	       relative	 time  compared	 to  UTC.  Supported  formats include:
	       -1200, MST, +0100.

       day of the week items
	       Specifies a day of the week. Days of the week  may  be  spelled
	       out  in	full  (using english): `Sunday', `Monday', etc or they
	       may be abbreviated to their first three letters. This  is  usu‐
	       ally not info that adds anything.

       pure numbers
	       If  a decimal number of the form YYYYMMDD appears, then YYYY is
	       read as the year, MM as the month number and DD as the  day  of
	       the month, for the specified calendar date.

       Sun, 06 Nov 1994 08:49:37 GMT
       Sunday, 06-Nov-94 08:49:37 GMT
       Sun Nov	6 08:49:37 1994
       06 Nov 1994 08:49:37 GMT
       06-Nov-94 08:49:37 GMT
       Nov  6 08:49:37 1994
       06 Nov 1994 08:49:37
       06-Nov-94 08:49:37
       1994 Nov 6 08:49:37
       GMT 08:49:37 06-Nov-94 Sunday
       94 6 Nov 08:49:37
       1994 Nov 6
       Sun Nov 6 94
       Sun, 06 Nov 1994 08:49:37 CET
       06 Nov 1994 08:49:37 EST
       Sun, 12 Sep 2004 15:05:58 -0700
       Sat, 11 Sep 2004 21:32:11 +0200
       20040912 15:05:58 -0700
       20040911 +0200

       This  parser  was  written  to handle date formats specified in RFC 822
       (including the update in RFC 1123) using time zone name	or  time  zone
       delta  and  RFC 850 (obsoleted by RFC 1036) and ANSI C's asctime() for‐
       mat. These formats are the only ones RFC2616 says HTTP applications may

       This function returns -1 when it fails to parse the date string. Other‐
       wise it returns the number of seconds as described.

       If the year is larger than 2037 on systems with	32  bit	 time_t,  this
       function	 will  return  0x7fffffff  (since that is the largest possible
       signed 32 bit number).

       Having a 64 bit time_t is not a guarantee that  dates  beyond  03:14:07
       UTC,  January  19, 2038 will work fine. On systems with a 64 bit time_t
       but with a crippled mktime(), curl_getdate will return -1 in this case.

       The former version of this function was built with  yacc	 and  was  not
       only  very large, it was also never quite understood and it wasn't pos‐
       sible to build with non-GNU tools since only GNU Bison  could  make  it

       The  rewrite  was done for 7.12.2. The new one is much smaller and uses
       simpler code.

libcurl 7.0			  12 Aug 2005		       curl_getdate(3)

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