localeconv(3C)
NAME
localeconv - get numeric formatting information
SYNOPSIS
#include <locale.h>
struct lconv *localeconv(void);
DESCRIPTION
The localeconv() function sets the components of an object
with type struct lconv (defined in <locale.h>) with the
values appropriate for the formatting of numeric quantities
(monetary and otherwise) according to the rules of the
current locale (see setlocale(3C)). The definition of struct
lconv is given below (the values for the fields in the "C"
locale are given in comments).
char *decimal_point; /* "." */
char *thousands_sep; /* "" (zero length string) */
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_MAX */
char frac_digits; /* CHAR_MAX */
char p_cs_precedes; /* CHAR_MAX */
char p_sep_by_space; /* CHAR_MAX */
char n_cs_precedes; /* CHAR_MAX */
char n_sep_by_space; /* CHAR_MAX */
char p_sign_posn; /* CHAR_MAX*/
char n_sign_posn; /* CHAR_MAX */
The members of the structure with type char * are strings,
any of which (except decimal_point) can point to a null
string (""), to indicate that the value is not available in
the current locale or is of zero length. The members with
type char are non-negative numbers, any of which can be
CHAR_MAX (defined in the <limits.h> header) to indicate that
the value is not available in the current locale. The
members are the following:
char *decimal_point
The decimal-point character used to format non-
monetary quantities.
char *thousands_sep
The character used to separate groups of digits to the
left of the decimal-point character in formatted non-
monetary quantities.
char *grouping
A string in which each element is taken as an integer
that indicates the number of digits that comprise the
current group in a formatted non-monetary quantity.
The elements of grouping are interpreted according to
the following:
CHAR_MAX
No further grouping is to be performed.
0 The previous element is to be repeatedly used
for the remainder of the digits.
other The value is the number of digits that comprise
the current group. The next element is examined
to determine the size of the next group of
digits to the left of the current group.
char *int_curr_symbol
The international currency symbol applicable to the
current locale, left-justified within a four-character
space-padded field. The character sequences should
match with those specified in ISO 4217 Codes for the
Representation of Currency and Funds.
char *currency_symbol
The local currency symbol applicable to the current
locale.
char *mon_decimal_point
The decimal point used to format monetary quantities.
char *mon_thousands_sep
The separator for groups of digits to the left of the
decimal point in formatted monetary quantities.
char *mon_grouping
A string in which each element is taken as an integer
that indicates the number of digits that comprise the
current group in a formatted monetary quantity. The
elements of mon_grouping are interpreted according to
the rules described under grouping.
char *positive_sign
The string used to indicate a non-negative-valued for-
matted monetary quantity.
char *negative_sign
The string used to indicate a negative-valued
formatted monetary quantity.
char int_frac_digits
The number of fractional digits (those to the right of
the decimal point) to be displayed in an internation-
ally formatted monetary quantity.
char frac_digits
The number of fractional digits (those to the right of
the decimal point) to be displayed in a formatted
monetary quantity.
char p_cs_precedes
Set to 1 or 0 if the currency_symbol respectively pre-
cedes or succeeds the value for a non-negative format-
ted monetary quantity.
char p_sep_by_space
Set to 1 or 0 if the currency_symbol respectively is
or is not separated by a space from the value for a
non-negative formatted monetary quantity.
char n_cs_precedes
Set to 1 or 0 if the currency_symbol respectively pre-
cedes or succeeds the value for a negative formatted
monetary quantity.
char n_sep_by_space
Set to 1 or 0 if the currency_symbol respectively is
or is not separated by a space from the value for a
negative formatted monetary quantity.
char p_sign_posn
Set to a value indicating the positioning of the
positive_sign for a non-negative formatted monetary
quantity. The value of p_sign_posn is interpreted
according to the following:
0 Parentheses surround the quantity and
currency_symbol.
1 The sign string precedes the quantity and
currency_symbol.
2 The sign string succeeds the quantity and
currency_symbol.
3 The sign string immediately precedes the
currency_symbol.
4 The sign string immediately succeeds the
currency_symbol.
char n_sign_posn
Set to a value indicating the positioning of the
negative_sign for a negative formatted monetary quan-
tity. The value of n_sign_posn is interpreted accord-
ing to the rules described under p_sign_posn.
RETURN VALUES
The localeconv() function returns a pointer to the filled-in
object. The structure pointed to by the return value may be
overwritten by a subsequent call to localeconv().
USAGE
The localeconv() function can be used safely in mul-
tithreaded applications, as long as setlocale(3C) is not
being called to change the locale.
EXAMPLES
Example 1: Rules used by four countries to format monetary
quantities.
The following table illustrates the rules used by four coun-
tries to format monetary quantities.
Country Positive format Negative format International format
Italy L.1.234 -l.1.234 ITL.1.234
Netherlands F 1.234,56 F -1.234,56 NLG 1.234,56
Norway kr1.234,56 kr1.234,56- NOK 1.234,56
Switzerland SFrs.1,234.56 SFrs.1,234.56C CHF 1,234.56
For these four countries, the respective values for the
monetary members of the structure returned by localeconv()
are as follows:
Italy Netherlands Norway Switzerland
int_curr_symbol "ITL." "NLG " "NOK " "CHF "
currency_symbol "L." "F" "kr" "SFrs."
mon_decimal_point "" "," "," "."
mon_thousands_sep "." "." "." ","
mon_grouping "\3" "\3" "\3" "\3"
positive_sign "" "" "" ""
negative_sign "-" "-" "-" "C"
int_frac_digits 0 2 2 2
frac_digits 0 2 2 2
p_cs_precedes 1 1 1 1
p_sep_by_space 0 1 0 0
n_cs_precedes 1 1 1 1
n_sep_by_space 0 1 0 0
p_sign_posn 1 1 1 1
n_sign_posn 1 4 2 2
FILES
/usr/lib/locale/locale/LC_MONETARY/monetary
LC_MONETARY database for locale
/usr/lib/locale/locale/LC_NUMERIC/numeric
LC_NUMERIC database for locale
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| MT-Level | MT-Safe with exceptions |
|_____________________________|_____________________________|
| CSI | Enabled |
|_____________________________|_____________________________|
SEE ALSO
setlocale(3C), attributes(5), environ(5)
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