Originální popis anglicky:
localeconv - return locale-specific information
Návod, kniha: POSIX Programmer's Manual
#include <locale.h>
struct lconv *localeconv(void);
The
localeconv() function shall set 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 ISO 4217:1995
standard. 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 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 a value indicating the separation of the currency_symbol, the
sign string, and the value for a non-negative formatted monetary
quantity.
- char n_cs_precedes
-
Set to 1 if the currency_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 a value indicating the separation of the currency_symbol, the
sign string, and 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.
- char n_sign_posn
-
Set to a value indicating the positioning of the negative_sign for a
negative formatted monetary quantity.
- char int_p_cs_precedes
-
Set to 1 or 0 if the int_curr_symbol respectively precedes or
succeeds the value for a non-negative internationally formatted monetary
quantity.
- char int_n_cs_precedes
-
Set to 1 or 0 if the int_curr_symbol respectively precedes or
succeeds the value for a negative internationally formatted monetary
quantity.
- char int_p_sep_by_space
-
Set to a value indicating the separation of the int_curr_symbol, the
sign string, and the value for a non-negative internationally formatted
monetary quantity.
- char int_n_sep_by_space
-
Set to a value indicating the separation of the int_curr_symbol, the
sign string, and the value for a negative internationally formatted
monetary quantity.
- char int_p_sign_posn
-
Set to a value indicating the positioning of the positive_sign for a
non-negative internationally formatted monetary quantity.
- char int_n_sign_posn
-
Set to a value indicating the positioning of the negative_sign for a
negative internationally 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_sep_by_space,
n_sep_by_space,
int_p_sep_by_space, and
int_n_sep_by_space are interpreted
according to the following:
- 0
- No space separates the currency symbol and value.
- 1
- If the currency symbol and sign string are adjacent, a
space separates them from the value; otherwise, a space separates the
currency symbol from the value.
- 2
- If the currency symbol and sign string are adjacent, a
space separates them; otherwise, a space separates the sign string from
the value.
For
int_p_sep_by_space and
int_n_sep_by_space, the fourth
character of
int_curr_symbol is used instead of a space.
The values of
p_sign_posn,
n_sign_posn,
int_p_sign_posn,
and
int_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 shall behave as if no function in this volume of
IEEE Std 1003.1-2001 calls
localeconv().
The
localeconv() function need not be reentrant. A function that is not
required to be reentrant is not required to be thread-safe.
The
localeconv() function shall return a pointer to the filled-in object.
The application shall not modify the structure pointed to by the return value
which 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.
The following sections are informative.
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 |
| int_p_cs_precedes |
1 |
1 |
1 |
1 |
| int_n_cs_precedes |
1 |
1 |
1 |
1 |
| int_p_sep_by_space |
0 |
0 |
0 |
0 |
| int_n_sep_by_space |
0 |
0 |
0 |
0 |
| int_p_sign_posn |
1 |
1 |
1 |
1 |
| int_n_sign_posn |
1 |
4 |
4 |
2 |
None.
None.
isalpha() ,
isascii() ,
nl_langinfo() ,
printf() ,
scanf() ,
setlocale() ,
strcat() ,
strchr() ,
strcmp() ,
strcoll() ,
strcpy() ,
strftime() ,
strlen() ,
strpbrk() ,
strspn() ,
strtok() ,
strxfrm() ,
strtod() , the Base Definitions volume of
IEEE Std 1003.1-2001,
<langinfo.h>,
<locale.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
