strptime(3C) strptime(3C)
NAME
strptime() - date and time conversion
SYNOPSIS
DESCRIPTION
The function converts the character string pointed to by buf to values which are stored in the structure pointed to by tm, using the format
specified by format.
The format is composed of zero or more directives. Each directive is composed of one of the following: one or more white-space characters
(as specified by the function); an ordinary character (neither nor a white-space character); or a conversion specification. Each conver-
sion specification is composed of a character followed by a conversion character which specifies the replacement required. There must be
whitespace or other non-alphanumeric characters between any two conversion specifications. The following conversion specifications are
supported:
is the day of week, using the locale's weekday names; either the abbreviated
or full name may be specified.
is the same as
is the month, using the locale's month names; either the abbreviated or full
name may be specified.
is the same as
is the date and time, using locale's date and time format (for example, as
is the century number [0,99]; leading zeros are permitted but not required.
is the day of month [1,31]; leading zeros are permitted but not required.
is the date as
is the same as
is the same as
is the hour (24-hour clock) [0,23]; leading zeros are permitted but not
required.
is the hour (12-hour clock) [1,12]; leading zeros are permitted but not
required.
is the day number of the year [1,366]; leading zeros are permitted but not
required.
is the month number [1,12]; leading zeros are permitted but not required.
is the minute [0,59]; leading zeros are permitted but not required.
is any whitespace.
is the locale's equivalent of a.m or p.m.
is the 12-hour clock time in AM/PM notation equivalent to
format or the format specified in of the portion of the current locale, if it is not empty. Otherwise, returns NULL.
is the time as
is the seconds [0,60]; leading zeros are permitted but not required.
is any whitespace.
is the time as
is the week number of the year (Sunday as the first day of the week) as a
decimal number [0,53]; leading zeros are permitted but not required. All days in a year preceding the first Sunday are con-
sidered to be in week 0.
is the weekday as a decimal number [0,6], with 0 representing Sunday;
leading zeros are permitted but not required.
is the week number of the year (Monday as the first day of the week) as a
decimal number [0,53]; leading zeros are permitted but not required. All days in a year preceding the first Monday are con-
sidered to be in week 0.
is the date, using the locale's date format.
is the time, using the locale's time format.
is the year within the century [0,99]; leading zeros are permitted but
not required. If no century has been specified (for example, via the directive), the 20th century(1900s) is assumed for
inputs in the range 69-99, and the 21st century(2000s) is assumed for inputs in the range 00-68.
is the year, including the century (for example, 1992).
is replaced by
Modified Directives
Some directives can be modified by the and modifier characters to indicate that an alternative format or specification should be used
rather than the one normally used by the unmodified directive. If the alternative format or specification does not exist in the current
locale, the behavior will be as if the unmodified directive were used.
is the locale's alternative appropriate date and time representation.
is the name of the base year (period) in the locale's alternative representation.
is the locale's alternative date representation.
is the locale's alternative time representation.
is the offset from
(year only) in the locale's alternative representation.
is the full alternative year representation.
is the day of the month using the locale's alternative numeric symbols; leading
zeros are permitted by not required.
is the same as
is the hour (24-hour clock) using the locale's alternative numeric symbols.
is the hour (12-hour clock) using the locale's alternative numeric symbols.
is the month using the locale's alternative numeric symbols.
is the minutes using the locale's alternative numeric symbols.
is the seconds using the locale's alternative numeric symbols.
is the week number of the year (Sunday as the first day of the week)
using the locale's alternative numeric symbols.
is the number of the weekday (Sunday=0) using the locale's alternative numeric
symbols.
is the week number of the year (Monday as the first day of the week) using the locale's
alternative numeric symbols.
is the year (offset from
in the locale's alternative representation and using the locale's alternative numeric symbols.
A directive composed of whitespace characters is executed by scanning input up to the first character that is not whitespace (which remains
unscanned), or until no more characters can be scanned.
A directive that is an ordinary character is executed by scanning the next character from the buffer. If the character scanned from the
buffer differs from the one comprising the directive, the directive fails, and the differing and subsequent characters remain unscanned.
A series of directives composed of whitespace characters or any combination thereof is executed by scanning up to the first character that
is not white space (which remains unscanned), or until no more characters can be scanned.
Any other conversion specification is executed by scanning characters until a character matching the next directive is scanned, or until no
more characters can be scanned. These characters, except the one matching the next directive, are then compared to the locale values asso-
ciated with the conversion specifier. If a match is found, values for the appropriate structure members are set to values corresponding to
the locale information. Case is ignored when matching items in buf such as month or weekday names. If no match is found, fails and no
more characters are scanned. If the date specified exceeds the maximum time representable by the data type in 32-bit HP-UX (which repre-
sents Tuesday January 19 03:14:07 UTC, 2038) or if the date exceeds the maximum date supported in 64-bit HP-UX (which is Friday December 31
23:59:59 UTC, 9999), fails and a null pointer is returned.
EXTERNAL INFLUENCES
Environment Variables
may define the alternative symbols (alt_digit; see localedef(4)) used by the modifier. The alt_digit definition has precedence over
alt_digits (Support for alt_digit may be removed in a future release of HP-UX.
determines the characters to be interpreted for those directives described above as being from the locale.
determines the interpretation of the bytes within format as single- and/or multibyte characters.
International Code Set Support
Single- and multibyte character code sets are supported.
RETURN VALUE
Upon successful completion, returns a pointer to the character following the last character parsed. Otherwise, a null pointer is returned.
EXAMPLES
The following program segment uses to convert the string (first argument) to values according to the format specified in the second argu-
ment.
struct tm t;
setlocale(LC_TIME, "en_US.iso88591");
strptime("1:04:23 PM on 10/6/92", "%I:%M:%S %p on %D", &t);
The converted value is stored in the structure t as follows:
t.tm_sec = 23
t.tm_min = 4
t.tm_hour = 13
t.tm_mday = 6
t.tm_mon = 9
t.tm_year = 92
t.tm_wday = 2
t.tm_yday = 279
t.tm_isdst = 1
AUTHOR
was developed by OSF and HP.
SEE ALSO
scanf(3S), strftime(3C), getdate(3C), ctime(3C), setlocale(3C), thread_safety(5).
STANDARDS CONFORMANCE
strptime(3C)