Manpage of JSTRFTIME

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# JSTRFTIME

Section: libjalali Manual (3)
Updated: 2011-05-28
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## NAME

jstrftime - format jalali date and time

## SYNOPSIS

    #include <jtime.h>

    size_t jstrftime(char *s, size_t max, const char *format,
                    const struct tm *jtm);

Link with -ljalali

## DESCRIPTION

The jstrftime() function formats the broken-down jalali time jtm according to the format specification format and places the result in the character array s of size max.

The format specification is a null-terminated string and may contain special character sequences called conversion specifications, each of which is introduced by a aq%aq character and terminated by some other character known as a conversion specifier character. All other character sequences are ordinary character sequences.

The characters of ordinary character sequences (including the null byte) are copied verbatim from format to s. However, the characters of conversion specifications are replaced as follows:

%a
  The abbreviated weekday name.
%A
  The full weekday name.
%b
  The abbreviated month name.
%B
  The full month name.
%c
  The preferred date and time representation.
%C
  The century number (year/100) as a 2-digit integer.
%d
  The day of the month as a decimal number (range 01 to 31).
%D
  Equivalent to %Y/%m/%d.
%e
  Like %d The day of the month as a decimal number, but a leading zero is replaced by a space. (SU)
%E
  The preferred date and time in Farsi. (utf8)
%F
  Equivalent to %Y-%m-%d (similar to the ISO 8601 date format). (C99)
%h
  The abbreviated Farsi transliterated weekday name.
%q
  The full Farsi transliterated weekday name.
%g
  The abbreviated Farsi weekday name. (utf8)
%G
  The full Farsi weekday name. (utf8)
%v
  The abbreviated Farsi month name. (utf8)
%V
  The full Farsi month name. (utf8)
%H
  The hour as a decimal number using a 24-hour clock (range 00 to 23).
%I
  The hour as a decimal number using a 12-hour clock (range 01 to 12).
%j
  The day of the year as a decimal number (range 001 to 366).
%k
  The hour (24-hour clock) as a decimal number (range 0 to 23); single digits are preceded by a blank. (See also %H.) (TZ)
%l
  The hour (12-hour clock) as a decimal number (range 1 to 12); single digits are preceded by a blank. (See also %I.) (TZ)
%m
  The month as a decimal number (range 01 to 12).
%M
  The minute as a decimal number (range 00 to 59).
%n
  A newline character. (SU)
%O
  AM or PM notation for the given time in Farsi equivalent. (utf8)
%p
  Either "AM" or "PM" according to the given time value. Noon is treated as "PM" and midnight as "AM".
%P
  Like %p but in lowercase: "am" or "pm"
%r
  The time in a.m. or p.m. notation. In the POSIX locale this is equivalent to %I:%M:%S %p. (SU)
%R
  The time in 24-hour notation (%H:%M). (SU) For a version including the seconds, see %T below.
%s
  The number of seconds since the Epoch, 1970-01-01 (1348-10-11) 00:00:00 +0000 (UTC). (TZ)
%S
  The second as a decimal number (range 00 to 59).
%t
  A tab character. (SU)
%T
  The time in 24-hour notation (%H:%M:%S). (SU)
%u
  The day of the week as a decimal, range 1 to 7, Saturday being 1. See also %w. (SU)
%U
  The week number of the current year as a decimal number, range 00 to 53, starting with the first Sunday as the first day of week 01.
%w
  The day of the week as a decimal, range 0 to 6, Saturday being 0. See also %u.
%W
  The preferred date in %Y/%m/%d format and Farsi. (utf8)
%x
  The preferred date representation without the time.
%X
  The preferred time representation without the date in Farsi. (utf8)
%y
  The year as a decimal number without a century (range 00 to 99).
%Y
  The year as a decimal number including the century.
%z
  The +hhmm or -hhmm numeric timezone (that is, the hour and minute offset from UTC). (SU)
%Z
  The timezone or name or abbreviation.
%%
  A literal aq%aq character.

The broken-down time structure tm is defined in <jtime.h>. See also jctime(3).

## RETURN VALUE

The jstrftime() function returns the number of characters placed in the array s, not including the terminating null byte, provided the string, including the terminating null byte, fits. Otherwise, it returns max, and the contents of the array is undefined.

## ENVIRONMENT

The environment variables TZ and LC_TIME are used.

## CONFORMING TO

C99.

## EXAMPLES

RFC 2822-compliant date format (with an English locale for %a and %b)

"%a, %d %b %Y %T %z"

RFC 822-compliant date format (with an English locale for %a and %b)

"%a, %d %b %y %T %z"

### Example Program

The program below can be used to experiment with jstrftime().

Some examples of the result string produced by the libjalali implementation of jstrftime() are as follows:

    $ ./a.out aq%maq
    Result string is "11"

Here's the program source:

    #include <stdio.h>
    #include <stdlib.h>
    #include <time.h>
    #include <jalali.h>
    #include <jtime.h>

    int
    main(int argc, char *argv[])
    {
        char outstr[200];
        time_t t;
        struct tm *tmp;

        t = time(NULL);
        tmp = jlocaltime(&t);
        if (tmp == NULL) {
            perror("jlocaltime");
            exit(EXIT_FAILURE);
        }

        if (jstrftime(outstr, sizeof(outstr), argv[1], tmp) == 0) {
            fprintf(stderr, "jstrftime returned 0");
            exit(EXIT_FAILURE);
        }

        printf("Result string is \"%s\"\n", outstr);
        exit(EXIT_SUCCESS);
    }

## SEE ALSO

jdate(1), jcal(1), time(2), jctime(3), sprintf(3), jstrptime(3)

## COLOPHON

This page is part of release 0.2 of the libjalali man-pages

## AUTHOR

Written by Ashkan Ghassemi. <ghassemi@ftml.net>

## REPORTING BUGS

Report libjalali bugs to <ghassemi@ftml.net>

libjalali home page: <http://savannah.nongnu.org/projects/jcal/>

## COPYRIGHT

Copyright (C) 2011 Ashkan Ghassemi.

License LGPLv3+: GNU LGPL version 3 or later <http://gnu.org/licenses/lgpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

## Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ENVIRONMENT
CONFORMING TO
EXAMPLES
  Example Program
SEE ALSO
COLOPHON
AUTHOR
REPORTING BUGS
COPYRIGHT

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Time: 00:22:18 GMT, June 15, 2011