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strptime(3) [osx man page]

STRPTIME(3)						   BSD Library Functions Manual 					       STRPTIME(3)

NAME
strptime, strptime_l -- parse date and time string LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <time.h> char * strptime(const char *restrict buf, const char *restrict format, struct tm *restrict tm); #include <time.h> #include <xlocale.h> char * strptime_l(const char *restrict buf, const char *restrict format, struct tm *restrict tm, locale_t loc); DESCRIPTION
The strptime() function parses the string in the buffer buf, according to the string pointed to by format, and fills in the elements of the structure pointed to by tm. The resulting values will be relative to the local time zone. Thus, it can be considered the reverse operation of strftime(3). The format string consists of zero or more conversion specifications and ordinary characters. All ordinary characters are matched exactly with the buffer, where white space in the format string will match any amount of white space in the buffer. All conversion specifications are identical to those described in strftime(3). Two-digit year values, including formats %y and %D, are now interpreted as beginning at 1969 per POSIX requirements. Years 69-00 are inter- preted in the 20th century (1969-2000), years 01-68 in the 21st century (2001-2068). If the format string does not contain enough conversion specifications to completely specify the resulting struct tm, the unspecified members of tm are left untouched. For example, if format is ``%H:%M:%S'', only tm_hour, tm_sec and tm_min will be modified. If time relative to today is desired, initialize the tm structure with today's date before passing it to strptime(). While the strptime() function uses the current locale, the strptime_l() function may be passed a locale directly. See xlocale(3) for more information. RETURN VALUES
Upon successful completion, strptime() returns the pointer to the first character in buf that has not been required to satisfy the specified conversions in format. It returns NULL if one of the conversions failed. LEGACY DESCRIPTION
In legacy mode, the %Y format specifier expects exactly 4 digits (leaving any trailing digits for the next specifier). SEE ALSO
date(1), scanf(3), strftime(3), xlocale(3) HISTORY
The strptime() function appeared in FreeBSD 3.0. AUTHORS
The strptime() function has been contributed by Powerdog Industries. This man page was written by Jorg Wunsch. BUGS
Both the %e and %l format specifiers may incorrectly scan one too many digits if the intended values comprise only a single digit and that digit is followed immediately by another digit. Both specifiers accept zero-padded values, even though they are both defined as taking unpadded values. The %p format specifier has no effect unless it is parsed after hour-related specifiers. Specifying %l without %p will produce undefined results. Note that 12AM (ante meridiem) is taken as midnight and 12PM (post meridiem) is taken as noon. The and format specifiers accept any value within the range 00 to 53 without validating against other values supplied (like month or day of the year, for example). The format specifier only accepts time zone abbreviations of the local time zone, or the value "GMT". This limitation is because of ambiguity due to of the over loading of time zone abbreviations. One such example is which is both Eastern Standard Time and Eastern Australia Summer Time. The function does not correctly handle multibyte characters in the format argument. BSD
January 4, 2003 BSD

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STRFTIME(3)						   BSD Library Functions Manual 					       STRFTIME(3)

NAME
strftime, strftime_l -- format date and time LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <time.h> size_t strftime(char *restrict s, size_t maxsize, const char *restrict format, const struct tm *restrict timeptr); #include <time.h> #include <xlocale.h> size_t strftime_l(char *restrict s, size_t maxsize, const char *restrict format, const struct tm *restrict timeptr, locale_t loc); DESCRIPTION
The strftime() function formats the information from timeptr into the buffer s, according to the string pointed to by format. The format string consists of zero or more conversion specifications and ordinary characters. All ordinary characters are copied directly into the buffer. A conversion specification consists of a percent sign ``'%''' and one other character. No more than maxsize characters will be placed into the array. If the total number of resulting characters, including the terminating NUL character, is not more than maxsize, strftime() returns the number of characters in the array, not counting the terminating NUL. Otherwise, zero is returned and the buffer contents are indeterminate. Although the strftime() function uses the current locale, the strftime_l() function may be passed a locale directly. See xlocale(3) for more information. The conversion specifications are copied to the buffer after expansion as follows:- %A is replaced by national representation of the full weekday name. %a is replaced by national representation of the abbreviated weekday name. %B is replaced by national representation of the full month name. %b is replaced by national representation of the abbreviated month name. %C is replaced by (year / 100) as decimal number; single digits are preceded by a zero. %c is replaced by national representation of time and date. %D is equivalent to ``%m/%d/%y''. %d is replaced by the day of the month as a decimal number (01-31). %E* %O* POSIX locale extensions. The sequences %Ec %EC %Ex %EX %Ey %EY %Od %Oe %OH %OI %Om %OM %OS %Ou %OU %OV %Ow %OW %Oy are supposed to provide alternate representations. Additionally %OB implemented to represent alternative months names (used standalone, without day mentioned). %e is replaced by the day of the month as a decimal number (1-31); single digits are preceded by a blank. %F is equivalent to ``%Y-%m-%d''. %G is replaced by a year as a decimal number with century. This year is the one that contains the greater part of the week (Monday as the first day of the week). %g is replaced by the same year as in ``%G'', but as a decimal number without century (00-99). %H is replaced by the hour (24-hour clock) as a decimal number (00-23). %h the same as %b. %I is replaced by the hour (12-hour clock) as a decimal number (01-12). %j is replaced by the day of the year as a decimal number (001-366). %k is replaced by the hour (24-hour clock) as a decimal number (0-23); single digits are preceded by a blank. %l is replaced by the hour (12-hour clock) as a decimal number (1-12); single digits are preceded by a blank. %M is replaced by the minute as a decimal number (00-59). %m is replaced by the month as a decimal number (01-12). %n is replaced by a newline. %O* the same as %E*. %p is replaced by national representation of either "ante meridiem" (a.m.) or "post meridiem" (p.m.) as appropriate. %R is equivalent to ``%H:%M''. %r is equivalent to ``%I:%M:%S %p''. %S is replaced by the second as a decimal number (00-60). %s is replaced by the number of seconds since the Epoch, UTC (see mktime(3)). %T is equivalent to ``%H:%M:%S''. %t is replaced by a tab. %U is replaced by the week number of the year (Sunday as the first day of the week) as a decimal number (00-53). %u is replaced by the weekday (Monday as the first day of the week) as a decimal number (1-7). %V is replaced by the week number of the year (Monday as the first day of the week) as a decimal number (01-53). If the week containing January 1 has four or more days in the new year, then it is week 1; otherwise it is the last week of the previous year, and the next week is week 1. %v is equivalent to ``%e-%b-%Y''. %W is replaced by the week number of the year (Monday as the first day of the week) as a decimal number (00-53). %w is replaced by the weekday (Sunday as the first day of the week) as a decimal number (0-6). %X is replaced by national representation of the time. %x is replaced by national representation of the date. %Y is replaced by the year with century as a decimal number. %y is replaced by the year without century as a decimal number (00-99). %Z is replaced by the time zone name. %z is replaced by the time zone offset from UTC; a leading plus sign stands for east of UTC, a minus sign for west of UTC, hours and min- utes follow with two digits each and no delimiter between them (common form for RFC 822 date headers). %+ is replaced by national representation of the date and time (the format is similar to that produced by date(1)). %-* GNU libc extension. Do not do any padding when performing numerical outputs. %_* GNU libc extension. Explicitly specify space for padding. %0* GNU libc extension. Explicitly specify zero for padding. %% is replaced by '%'. SEE ALSO
date(1), printf(1), ctime(3), printf(3), strptime(3), wcsftime(3), xlocale(3) STANDARDS
The strftime() function conforms to ISO/IEC 9899:1990 (``ISO C90'') with a lot of extensions including '''', '%E*', '%e', '%G', '%g', '%h', '%k', '%l', '%n', '%O*', '%R', '%r', '%s', '%T', '%t', '%u', '%V', '%z', and '%+'. The peculiar week number and year in the replacements of '%G', '%g', and '%V' are defined in ISO 8601: 1988. BUGS
There is no conversion specification for the phase of the moon. The strftime() function does not correctly handle multibyte characters in the format argument. BSD
November 4, 2004 BSD

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