strptime(3C)

Synopsis

char strptime(const char buf, const char format, struct tm tm);

Description

format is composed of zero or more directives where each directive is composed of one of the following:

• one or more white-space characters as specified by the isspace function

• an ordinary character (neither % or non white-space character)

• a conversion specification

Conversion specifications

%a

locale's full or abbreviated weekday name

%A

same as %a

%b

locale's full or abbreviated month name

%B

same as %b

%c

locale's appropriate date and time representation (for example, %x %X)

%C

number of the century (00 - 99), leading zeros are optional

%d

day of month ( 01 - 31 ), leading zeros are optional

%D

date as %m/%d/%y

%e

same as %d

%h

same as %b

%H

hour ( 00 - 23 ), leading zeros are optional

%I

hour ( 01 - 12 ), leading zeros are optional

%j

day number of year ( 001 - 366 ), leading zeros are optional

%m

month number ( 01 - 12 ), leading zeros are optional

%M

minute ( 00 - 59 ), leading zeros are optional

%N

date and time

%n

any white space

%p

locale's equivalent of either AM or PM

%r

locale's time with 12-hour clock

%R

time as %H:%M

%S

seconds ( 00 - 61 ), allows for leap seconds, leading zeros are optional

%t

any white space

%T

time as %H:%M:%S

%U

week number of year ( 00 - 53 ), Sunday is the first day of week 1, leading zeros are optional

%w

weekday number ( 0 - 6 ), Sunday = 0, leading zeros are optional

%W

week number of year ( 00 - 53 ), Monday is the first day of week 1, leading zeros are optional

%x

locale's appropriate date representation

%X

locale's appropriate time representation

%y

year within century ( 00 - 99 ), leading zeros are optional

%Y

year as ccyy (for example, 1986)

%%

same as %

Modified conversion specifiers

%Od

the day of the month, using the locale's alternative digit symbols filled as needed with leading zeros if available, otherwise, filled with spaces.

%Oe

same as %Od

%OH

the hour (24 hour clock), using the locale's alternative digit symbols.

%OI

the hour (12 hour clock), using the locale's alternative digit symbols.

%Om

the month using the locale's alternative digit symbols.

%OM

the minutes using the locale's alternative digit symbols.

%OS

the seconds using the locale's alternative digit symbols.

%OU

the week number using the locale's alternative digit symbols (see rules for %U).

%Ow

the weekday as a number using the locale's alternative digit symbols (Sunday = 0).

%OW

the week number using the locale's alternative digit symbols (see rules for %W).

%Oy

the year (offset from %C) using the locale's alternative digit symbols.

%E is a modifier used to match the date using different era information as specified in the LC_TIME locale data file.

%Ec

the locale's alternative representation for date and time.

%EC

the locale's alternative representation for the name of the base year (period).

%Ex

the locale's alternative representation for the date.

%EX

the locale's alternative representation for the time.

%Ey

the offset from %EC in the locale's alternative representation (year only).

%EY

the full alternative year representation.

A directive comprised of white-space characters is executed by scanning input up to the first character that is not white space 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 %n, %t, white-space characters or any combination 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 associated with the conversion specifier. If a match is found, values for the appropriate tm structure members are set to values corresponding to the locale information. Case is ignored when matching items are in buf such as month or weekday names. If no match is found, strptime fails and no more characters are scanned.

Return values

Usage

References