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langinfo.h, langinfo - language information constants

#include <langinfo.h>

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>.

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.

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

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Interface Stability	Standard

mkmsgs(1), localeconv(3C), nl_langinfo(3C), nl_types.h(3HEAD), setlocale(3C), strftime(3C), attributes(5), standards(5)