man pages section 3: Library Interfaces and Headers

langinfo(3HEAD)

Name

langinfo.h, langinfo– language information constants

Synopsis

#include <langinfo.h>

Description

The <langinfo.h> header contains the constants used to identify items of langinfo data (see nl_langinfo(3C)). The type of the constant, nl_item, is defined as described in <nl_types.h>.

The following constants are defined. The entries under Category indicate in which setlocale(3C) category each item is defined.

Constant	Category	Meaning
`CODESET`	`LC_CTYPE`	codeset name
`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
`AM_STR`	`LC_TIME`	ante-meridiem affix
`PM_STR`	`LC_TIME`	post-meridiem affix
`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 seventh 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
`RADIXCHAR`	`LC_NUMERIC`	radix character
`THOUSEP`	`LC_NUMERIC`	separator for thousands
`YESEXPR`	`LC_MESSAGES`	affirmative response expression
`NOEXPR`	`LC_MESSAGES`	negative response expression
`YESSTR`	`LC_MESSAGES`	affirmative response for yes/no queries
`NOSTR`	`LC_MESSAGES`	negative response ro yes/no queries
`CRNCYSTR`	`LC_MONETARY`	local currency symbol, preceded by '-' if the symbol sould appear before the value, '+' if the symbol should appear after the value, or '.' if the symbol should replace the radix character

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 <langinfo.h> header declares the following as a function:

char *nl_langinfo(nl_item);

Inclusion of <langinfo.h> header may also make visible all symbols from <nl_types.h>.

Usage

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(3C) function should be used to access date and time information defined in category LC_TIME. The localeconv(3C) function should be used to access information corresponding to RADIXCHAR, THOUSEP, and CRNCYSTR.

Attributes

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Interface Stability	Standard