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SETLOCALE(3)		 BSD Library Functions Manual		  SETLOCALE(3)

     setlocale,	localeconv -- natural language formatting for C

     Standard C	Library	(libc, -lc)

     #include <locale.h>

     char *
     setlocale(int category, const char	*locale);

     struct lconv *

     The setlocale() function sets the C library's notion of natural language
     formatting	style for particular sets of routines.	Each such style	is
     called a `locale' and is invoked using an appropriate name	passed as a C
     string.  The localeconv() routine returns the current locale's parameters
     for formatting numbers.

     The setlocale() function recognizes several categories of routines.
     These are the categories and the sets of routines they select:

     LC_ALL	  Set the entire locale	generically.

     LC_COLLATE	  Set a	locale for string collation routines.  This controls
		  alphabetic ordering in strcoll() and strxfrm().

     LC_CTYPE	  Set a	locale for the ctype(3), mbrune(3), multibyte(3) and
		  rune(3) functions.  This controls recognition	of upper and
		  lower	case, alphabetic or non-alphabetic characters, and so
		  on.  The real	work is	done by	the setrunelocale() function.

     LC_MESSAGES  Set a	locale for message catalogs, see catopen(3) function.

     LC_MONETARY  Set a	locale for formatting monetary values; this affects
		  the localeconv() function.

     LC_NUMERIC	  Set a	locale for formatting numbers.	This controls the for-
		  matting of decimal points in input and output	of floating
		  point	numbers	in functions such as printf() and scanf(), as
		  well as values returned by localeconv().

     LC_TIME	  Set a	locale for formatting dates and	times using the
		  strftime() function.

     Only three	locales	are defined by default,	the empty string "" which de-
     notes the native environment, and the "C" and "POSIX" locales, which de-
     note the C	language environment.  A locale	argument of NULL causes
     setlocale() to return the current locale.	By default, C programs start
     in	the "C"	locale.	 The only function in the library that sets the	locale
     is	setlocale(); the locale	is never changed as a side effect of some
     other routine.

     The localeconv() function returns a pointer to a structure	which provides
     parameters	for formatting numbers,	especially currency values:

	   struct lconv	{
		   char	   *decimal_point;
		   char	   *thousands_sep;
		   char	   *grouping;
		   char	   *int_curr_symbol;
		   char	   *currency_symbol;
		   char	   *mon_decimal_point;
		   char	   *mon_thousands_sep;
		   char	   *mon_grouping;
		   char	   *positive_sign;
		   char	   *negative_sign;
		   char	   int_frac_digits;
		   char	   frac_digits;
		   char	   p_cs_precedes;
		   char	   p_sep_by_space;
		   char	   n_cs_precedes;
		   char	   n_sep_by_space;
		   char	   p_sign_posn;
		   char	   n_sign_posn;

     The individual fields have	the following meanings:

     decimal_point	The decimal point character, except for	currency val-

     thousands_sep	The separator between groups of	digits before the dec-
			imal point, except for currency	values.

     grouping		The sizes of the groups	of digits, except for currency
			values.	 This is a pointer to a	vector of integers,
			each of	size char, representing	group size from	low
			order digit groups to high order (right	to left).  The
			list may be terminated with 0 or CHAR_MAX.  If the
			list is	terminated with	0, the last group size before
			the 0 is repeated to account for all the digits.  If
			the list is terminated with CHAR_MAX, no more grouping
			is performed.

     int_curr_symbol	The standardized international currency	symbol.

     currency_symbol	The local currency symbol.

     mon_decimal_point	The decimal point character for	currency values.

     mon_thousands_sep	The separator for digit	groups in currency values.

     mon_grouping	Like grouping but for currency values.

     positive_sign	The character used to denote nonnegative currency val-
			ues, usually the empty string.

     negative_sign	The character used to denote negative currency values,
			usually	a minus	sign.

     int_frac_digits	The number of digits after the decimal point in	an in-
			ternational-style currency value.

     frac_digits	The number of digits after the decimal point in	the
			local style for	currency values.

     p_cs_precedes	1 if the currency symbol precedes the currency value
			for nonnegative	values,	0 if it	follows.

     p_sep_by_space	1 if a space is	inserted between the currency symbol
			and the	currency value for nonnegative values, 0 oth-

     n_cs_precedes	Like p_cs_precedes but for negative values.

     n_sep_by_space	Like p_sep_by_space but	for negative values.

     p_sign_posn	The location of	the positive_sign with respect to a
			nonnegative quantity and the currency_symbol, coded as
			0    Parentheses around	the entire string.
			1    Before the	string.
			2    After the string.
			3    Just before currency_symbol.
			4    Just after	currency_symbol.

     n_sign_posn	Like p_sign_posn but for negative currency values.

     Unless mentioned above, an	empty string as	a value	for a field indicates
     a zero length result or a value that is not in the	current	locale.	 A
     CHAR_MAX result similarly denotes an unavailable value.

     Upon successful completion, setlocale() returns the string	associated
     with the specified	category for the requested locale.  The	setlocale()
     function returns NULL and fails to	change the locale if the given combi-
     nation of category	and locale makes no sense.  The	localeconv() function
     returns a pointer to a static object which	may be altered by later	calls
     to	setlocale() or localeconv().

     No	errors are defined.

     /usr/share/locale/locale/category	locale file for	the locale locale and
					the category category.

     colldef(1), mklocale(1), catopen(3), ctype(3), mbrune(3), multibyte(3),
     rune(3), strcoll(3), strxfrm(3), euc(4), utf2(4)

     The setlocale() and localeconv() functions	conform	to ISO/IEC 9899:1990
     ("ISO C90").

     The setlocale() and localeconv() functions	first appeared in 4.4BSD.

BSD				 June 9, 1993				   BSD


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