The <langinfo.h> header contains the constants used to identify items of langinfo data (see nl_langinfo()). The type of the constant, nl_item, shall be defined as described in <nl_types.h> .
The following constants shall be defined. The entries under Category indicate in which setlocale() category each item is defined.
|D_T_FMT||LC_TIME||String for formatting date and time.|
|D_FMT||LC_TIME||Date format string.|
|T_FMT||LC_TIME||Time format string.|
|T_FMT_AMPM||LC_TIME||a.m. or p.m. time format string.|
|DAY_1||LC_TIME||Name of the first day of the week (for example, Sunday).|
|DAY_2||LC_TIME||Name of the second day of the week (for example, Monday).|
|DAY_3||LC_TIME||Name of the third day of the week (for example, Tuesday).|
|DAY_4||LC_TIME||Name of the fourth day of the week|
|(for example, Wednesday).|
|DAY_5||LC_TIME||Name of the fifth day of the week (for example, Thursday).|
|DAY_6||LC_TIME||Name of the sixth day of the week (for example, Friday).|
|DAY_7||LC_TIME||Name of the seventh day of the week|
|(for example, Saturday).|
|ABDAY_1||LC_TIME||Abbreviated name of the first day of the week.|
|ABDAY_2||LC_TIME||Abbreviated name of the second day of the week.|
|ABDAY_3||LC_TIME||Abbreviated name of the third day of the week.|
|ABDAY_4||LC_TIME||Abbreviated name of the fourth day of the week.|
|ABDAY_5||LC_TIME||Abbreviated name of the fifth day of the week.|
|ABDAY_6||LC_TIME||Abbreviated name of the sixth day of the week.|
|ABDAY_7||LC_TIME||Abbreviated name of the seventh day of the week.|
|MON_1||LC_TIME||Name of the first month of the year.|
|MON_2||LC_TIME||Name of the second month.|
|MON_3||LC_TIME||Name of the third month.|
|MON_4||LC_TIME||Name of the fourth month.|
|MON_5||LC_TIME||Name of the fifth month.|
|MON_6||LC_TIME||Name of the sixth month.|
|MON_7||LC_TIME||Name of the seventh month.|
|MON_8||LC_TIME||Name of the eighth month.|
|MON_9||LC_TIME||Name of the ninth month.|
|MON_10||LC_TIME||Name of the tenth month.|
|MON_11||LC_TIME||Name of the eleventh month.|
|MON_12||LC_TIME||Name of the twelfth month.|
|ABMON_1||LC_TIME||Abbreviated name of the first month.|
|ABMON_2||LC_TIME||Abbreviated name of the second month.|
|ABMON_3||LC_TIME||Abbreviated name of the third month.|
|ABMON_4||LC_TIME||Abbreviated name of the fourth month.|
|ABMON_5||LC_TIME||Abbreviated name of the fifth month.|
|ABMON_6||LC_TIME||Abbreviated name of the sixth month.|
|ABMON_7||LC_TIME||Abbreviated name of the seventh month.|
|ABMON_8||LC_TIME||Abbreviated name of the eighth month.|
|ABMON_9||LC_TIME||Abbreviated name of the ninth month.|
|ABMON_10||LC_TIME||Abbreviated name of the tenth month.|
|ABMON_11||LC_TIME||Abbreviated name of the eleventh month.|
|ABMON_12||LC_TIME||Abbreviated name of the twelfth month.|
|ERA||LC_TIME||Era description segments.|
|ERA_D_FMT||LC_TIME||Era date format string.|
|ERA_D_T_FMT||LC_TIME||Era date and time format string.|
|ERA_T_FMT||LC_TIME||Era time format string.|
|ALT_DIGITS||LC_TIME||Alternative symbols for digits.|
|THOUSEP||LC_NUMERIC||Separator for thousands.|
|YESEXPR||LC_MESSAGES||Affirmative response expression.|
|NOEXPR||LC_MESSAGES||Negative response expression.|
|CRNCYSTR||LC_MONETARY||Local currency symbol, preceded by '-' if the symbol should appear before the value, '+' if the symbol should appear after the value, or '.' if the symbol should replace the radix character. If the local currency symbol is the empty string, implementations may return the empty string ( "" ).|
If the locale's values for p_cs_precedes and n_cs_precedes do not match, the value of nl_langinfo(CRNCYSTR) is unspecified.
The following shall be declared as a function and may also be defined as a macro. A function prototype shall be provided.
Inclusion of the <langinfo.h> header may also make visible all symbols from <nl_types.h>.
The following sections are informative.
Wherever possible, users are advised to use functions compatible with those in the ISO C standard to access items of langinfo data. In particular, the strftime() function should be used to access date and time information defined in category LC_TIME . The localeconv() function should be used to access information corresponding to RADIXCHAR, THOUSEP, and CRNCYSTR.
COPYRIGHTPortions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .