std::time_put<CharT,OutputIt>::put,std::time_put<CharT,OutputIt>::do_put (3) - Linux Manuals

std::time_put<CharT,OutputIt>::put,std::time_put<CharT,OutputIt>::do_put: std::time_put<CharT,OutputIt>::put,std::time_put<CharT,OutputIt>::do_put

NAME

std::time_put<CharT,OutputIt>::put,std::time_put<CharT,OutputIt>::do_put - std::time_put<CharT,OutputIt>::put,std::time_put<CharT,OutputIt>::do_put

Synopsis

Defined in header <locale>
public:
iter_type put( iter_type out, std::ios_base& str, (1)
char_type fill, const std::tm* t,
const CharT* fmtbeg, const CharT* fmtend ) const;
public:
iter_type put( iter_type out, std::ios_base& str, (2)
char_type fill, const std::tm* t,
char format, char modifier = 0 ) const;
protected:
virtual iter_type do_put( iter_type out, std::ios_base& str, (3)
char_type fill, const std::tm* t,
char format, char modifier ) const;

Converts the calendar date and time stored in the std::tm object pointed to by t into a character string, according to the format string [fmtbeg, fmtend). The format string is the same as used by std::srtftime, but each format specifier is processed by an individual call to do_put(), which can be customized by extending this facet.
1) Steps through the character sequence [fmtbeg, fmtend), examining the characters. Every character that is not a part of a format sequence is written to the output iterator out immediately. To identify format sequences, this function narrows the next character c in [fmtbeg, fmtend) as if by std::ctype<char_type>(str.getloc()).narrow(c,0) and if it equals '%', the next one or two characters are compared to the list of format sequences recognized by std::strftime plus any additional implementation-defined formats supported by this locale. For each valid format sequence, a call to do_put(out, str, fill, t, format, modifier) is made, where format is the format sequence character, and modifier is the optional format sequence modifier ('E' or 'O'). A value of '\0' is used if the modifier is absent.
2) Calls the do_put member function of the most derived class.
3) Converts the calendar date and time stored in the std::tm object pointed to by t into a character string, according to the format conversion sequence formed by concatenating '%', the value of modifier if not '\0', and the value of format. The format is interpreted the same way as the function std::strftime, except that the formats that are described as locale-dependent are defined by this locale, and additional format specifiers may be supported (the fill argument is provided for these implementation-defined format specifiers to use). The string is written to the output iterator out.

Parameters

out - output iterator where the result of the conversion is written
str - a stream object that this function uses to obtain locale facets when needed, e.g. std::ctype to narrow characters
t - pointer to the std::tm object from which the date/time values are obtained
           pointer to the first character of a sequence of char_type characters specifying the conversion format
           The format string consists of zero or more conversion specifiers and ordinary characters (except %). All ordinary characters, including the terminating null character, are copied to the output string without modification. Each conversion specification begins with % character, optionally followed by E or O modifier (ignored if unsupported by the locale), followed by the character that determines the behavior of the specifier. The following format specifiers are available:

           Conversion Explanation Used fields
           specifier
           % writes literal %. The full conversion specification must be %%.
           n writes newline character
           (C++11)
           t writes horizontal tab character
           (C++11)
           Year
           Y writes year as a decimal number, e.g. 2017 tm_year
           EY writes year in the alternative representation, e.g.平成23年 (year Heisei 23) instead of 2011年 (year 2011) in ja_JP loctm_year
           (C++11)
           y writes last 2 digits of year as a decimal number (range [00,99]) tm_year
           Oy writes last 2 digits of year using the alternative numeric system, e.g. 十一 instead of 11 in ja_JP locale tm_year
           (C++11)
           Ey writes year as offset from locale's alternative calendar period %EC (locale-dependent) tm_year
           (C++11)
           C writes first 2 digits of year as a decimal number (range [00,99]) tm_year
           (C++11)
           EC writes name of the base year (period) in the locale's alternative representation, e.g. 平成 (Heisei era) in ja_JP tm_year
           (C++11)
                      writes ISO 8601 week-based year, i.e. the year that contains the specified week.
                      In IS0 8601 weeks begin with Monday and the first week of the year must satisfy the following requirements:
           G tm_year, tm_wday, tm_yday
           (C++11) * Includes January 4
                      * Includes first Thursday of the year

                      writes last 2 digits of ISO 8601 week-based year, i.e. the year that contains the specified week (range [00,99]).
                      In IS0 8601 weeks begin with Monday and the first week of the year must satisfy the following requirements:
           g tm_year, tm_wday, tm_yday
           (C++11) * Includes January 4
                      * Includes first Thursday of the year

           Month
           b writes abbreviated month name, e.g. Oct (locale dependent) tm_mon
           h synonym of b tm_mon
           (C++11)
           B writes full month name, e.g. October (locale dependent) tm_mon
           m writes month as a decimal number (range [01,12]) tm_mon
           Om writes month using the alternative numeric system, e.g. 十二 instead of 12 in ja_JP locale tm_mon
           (C++11)
           Week
           U writes week of the year as a decimal number (Sunday is the first day of the week) (range [00,53]) tm_year, tm_wday, tm_yday
           OU writes week of the year, as by %U, using the alternative numeric system, e.g. 五十二 instead of 52 in ja_JP locale tm_year, tm_wday, tm_yday
           (C++11)
           W writes week of the year as a decimal number (Monday is the first day of the week) (range [00,53]) tm_year, tm_wday, tm_yday
           OW writes week of the year, as by %W, using the alternative numeric system, e.g. 五十二 instead of 52 in ja_JP locale tm_year, tm_wday, tm_yday
           (C++11)
                      writes ISO 8601 week of the year (range [01,53]).
                      In IS0 8601 weeks begin with Monday and the first week of the year must satisfy the following requirements:
           V tm_year, tm_wday, tm_yday
           (C++11) * Includes January 4
                      * Includes first Thursday of the year

           OV writes week of the year, as by %V, using the alternative numeric system, e.g. 五十二 instead of 52 in ja_JP locale tm_year, tm_wday, tm_yday
fmtbeg - (C++11)
           Day of the year/month
           j writes day of the year as a decimal number (range [001,366]) tm_yday
           d writes day of the month as a decimal number (range [01,31]) tm_mday
           Od writes zero-based day of the month using the alternative numeric system, e.g 二十七 instead of 27 in ja_JP locale tm_mday
           (C++11) Single character is preceded by a space.
           e writes day of the month as a decimal number (range [1,31]). tm_mday
           (C++11) Single digit is preceded by a space.
           Oe writes one-based day of the month using the alternative numeric system, e.g. 二十七 instead of 27 in ja_JP locale tm_mday
           (C++11) Single character is preceded by a space.
           Day of the week
           a writes abbreviated weekday name, e.g. Fri (locale dependent) tm_wday
           A writes full weekday name, e.g. Friday (locale dependent) tm_wday
           w writes weekday as a decimal number, where Sunday is 0 (range [0-6]) tm_wday
           Ow writes weekday, where Sunday is 0, using the alternative numeric system, e.g. 二 instead of 2 in ja_JP locale tm_wday
           (C++11)
           u writes weekday as a decimal number, where Monday is 1 (ISO 8601 format) (range [1-7]) tm_wday
           (C++11)
           Ou writes weekday, where Monday is 1, using the alternative numeric system, e.g. 二 instead of 2 in ja_JP locale tm_wday
           (C++11)
           Hour, minute, second
           H writes hour as a decimal number, 24 hour clock (range [00-23]) tm_hour
           OH writes hour from 24-hour clock using the alternative numeric system, e.g. 十八 instead of 18 in ja_JP locale tm_hour
           (C++11)
           I writes hour as a decimal number, 12 hour clock (range [01,12]) tm_hour
           OI writes hour from 12-hour clock using the alternative numeric system, e.g. 六 instead of 06 in ja_JP locale tm_hour
           (C++11)
           M writes minute as a decimal number (range [00,59]) tm_min
           OM writes minute using the alternative numeric system, e.g. 二十五 instead of 25 in ja_JP locale tm_min
           (C++11)
           S writes second as a decimal number (range [00,60]) tm_sec
           OS writes second using the alternative numeric system, e.g. 二十四 instead of 24 in ja_JP locale tm_sec
           (C++11)

Other

           c writes standard date and time string, e.g. Sun Oct 17 04:41:13 2010 (locale dependent) all
           Ec writes alternative date and time string, e.g. using 平成23年 (year Heisei 23) instead of 2011年 (year 2011) in ja_JP loalle
           (C++11)
           x writes localized date representation (locale dependent) all
           Ex writes alternative date representation, e.g. using 平成23年 (year Heisei 23) instead of 2011年 (year 2011) in ja_JP locall
           (C++11)
           X writes localized time representation (locale dependent) all
           EX writes alternative time representation (locale dependent) all
           (C++11)
           D equivalent to "%m/%d/%y" tm_mon, tm_mday, tm_year
           (C++11)
           F equivalent to "%Y-%m-%d" (the ISO 8601 date format) tm_mon, tm_mday, tm_year
           (C++11)
           r writes localized 12-hour clock time (locale dependent) tm_hour, tm_min, tm_sec
           (C++11)
           R equivalent to "%H:%M" tm_hour, tm_min
           (C++11)
           T equivalent to "%H:%M:%S" (the ISO 8601 time format) tm_hour, tm_min, tm_sec
           (C++11)
           p writes localized a.m. or p.m. (locale dependent) tm_hour
           z writes offset from UTC in the ISO 8601 format (e.g. -0430), or no characters if the time zone information is not available tm_isdst
           (C++11)
           Z writes locale-dependent time zone name or abbreviation, or no characters if the time zone information is not available tm_isdst

fmtend - pointer one past the last character of a sequence of char_type characters specifying the conversion format
fill - fill character (usually space)
format - the character that names a conversion specifier
modifier - the optional modifier that may appear between % and the conversion specifier

Return value

Iterator pointing one past the last character that was produced .

Notes

No error handling is provided.
The fill character is provided for those implementation-defined format specifiers and for the user-defined overrides of do_put() that use padding and filling logic. Such implementations typically make use of the formatting flags from str.

Example

// Run this code

  #include <iostream>
  #include <sstream>
  #include <iomanip>
  #include <ctime>

  void try_time_put(const std::tm* t, const std::string& fmt)
  {
          std::cout.imbue(std::locale());
          std::cout << "In the locale '" << std::cout.getloc().name() << "' : '";

          std::use_facet<std::time_put<char>>(std::cout.getloc()).put(
                      {std::cout}, std::cout, ' ', t, &fmt[0], &fmt[0] + fmt.size());

          std::cout << "'\n";
  }

  int main()
  {
      std::time_t t = std::time(NULL);
      std::tm tm = *std::localtime(&t);

      std::string fmt = "%c";
      std::cout << "Using the format string '" << fmt
                << "' to format the time: " << std::ctime(&t) << '\n';

      std::locale::global(std::locale("de_DE.utf8"));
      try_time_put(&tm, fmt);

      std::locale::global(std::locale("el_GR.utf8"));
      try_time_put(&tm, fmt);

      std::locale::global(std::locale("ja_JP.utf8"));
      try_time_put(&tm, fmt);
  }

Output:

  Using the format string '%c' to format the time: Mon Feb 11 22:58:50 2013

  In the locale 'de_DE.utf8' : 'Mo 11 Feb 2013 23:02:38 EST'
  In the locale 'el_GR.utf8' : 'Δευ 11 Φεβ 2013 11:02:38 μμ EST'
  In the locale 'ja_JP.utf8' : '2013年02月11日 23時02分38秒'