localeconv - determine the program locale
#include <locale.h>
struct lconv *localeconv(void);
The localeconv() function sets the components of an object with the type struct lconv with the values appropriate for the formatting of numeric quantities (monetary and otherwise) according to the rules of the current locale.
The members of the structure with type char * are pointers to strings, any of which (except decimal_point) can point to "", 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} to indicate that the value is not available in the current locale.
The members include the following:
- char *decimal_point
- The radix character used to format non-monetary quantities.
- char *thousands_sep
- The character used to separate groups of digits before the decimal-point character in formatted non-monetary quantities.
- char *grouping
- A string whose elements taken as one-byte integer values indicate the size of each group of digits in formatted non-monetary quantities.
- char *int_curr_symbol
- The international currency symbol applicable to the current locale. The first three characters contain the alphabetic international currency symbol in accordance with those specified in the . The fourth character (immediately preceding the null byte) is the character used to separate the international currency symbol from the monetary quantity.
- char *currency_symbol
- The local currency symbol applicable to the current locale.
- char *mon_decimal_point
- The radix character used to format monetary quantities.
- char *mon_thousands_sep
- The separator for groups of digits before the decimal-point in formatted monetary quantities.
- char *mon_grouping
- A string whose elements taken as one-byte integer values indicate the size of each group of digits in formatted monetary quantities.
- char *positive_sign
- The string used to indicate a non-negative valued formatted 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 after the decimal-point) to be displayed in an internationally formatted monetary quantity.
- char frac_digits
- The number of fractional digits (those after the decimal-point) to be displayed in a formatted monetary quantity.
- char p_cs_precedes
- Set to 1 if the currency_symbol or int_curr_symbol precedes the value for a non-negative formatted monetary quantity. Set to 0 if the symbol succeeds the value.
- char p_sep_by_space
- Set to 0 if no space separates the currency_symbol or int_curr_symbol from the value for a non-negative formatted monetary quantity. Set to 1 if a space separates the symbol from the value; and set to 2 if a space separates the symbol and the sign string, if adjacent.
- char n_cs_precedes
- Set to 1 if the currency_symbol or int_curr_symbol precedes the value for a negative formatted monetary quantity. Set to 0 if the symbol succeeds the value.
- char n_sep_by_space
- Set to 0 if no space separates the currency_symbol or int_curr_symbol from the value for a negative formatted monetary quantity. Set to 1 if a space separates the symbol from the value; and set to 2 if a space separates the symbol and the sign string, if adjacent.
- char p_sign_posn
- Set to a value indicating the positioning of the positive_sign for a non-negative formatted monetary quantity.
- char n_sign_posn
- Set to a value indicating the positioning of the negative_sign for a negative formatted monetary quantity.
The elements of grouping and mon_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 integer 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 before the current group.
The values of p_sign_posn and n_sign_posn are interpreted according to the following:
- 0
- Parentheses surround the quantity and currency_symbol or int_curr_symbol.
- 1
- The sign string precedes the quantity and currency_symbol or int_curr_symbol.
- 2
- The sign string succeeds the quantity and currency_symbol or int_curr_symbol.
- 3
- The sign string immediately precedes the currency_symbol or int_curr_symbol.
- 4
- The sign string immediately succeeds the currency_symbol or int_curr_symbol.
The implementation will behave as if no function in this specification calls localeconv().
The localeconv() function returns a pointer to the filled-in object. The structure pointed to by the return value must not be modified by the program, but may be overwritten by a subsequent call to localeconv(). In addition, calls to setlocale() with the categories LC_ALL, LC_MONETARY, or LC_NUMERIC may overwrite the contents of the structure.
No errors are defined.
None.
The following table illustrates the rules which may be used by four countries to format monetary quantities.
Country Positive Format Negative Format International Format Italy L.1.230 -L.1.230 ITL.1.230 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:
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
None.
isalpha()
, isascii(), nl_langinfo(), printf(), scanf(), setlocale(), strcat(), strchr(), strcmp(), strcoll(), strcpy(), strftime(), strlen(), strpbrk(), strspn(), strtok(), strxfrm(), strtod(), <langinfo.h>, <locale.h>.
Derived from the ANSI C standard.