преобразовать денежное значение в строку (convert monetary value to a string)
Имя (Name)
strfmon, strfmon_l - convert monetary value to a string
Синопсис (Synopsis)
#include <monetary.h>
ssize_t strfmon(char *restrict s, size_t max,
const char *restrict format, ...);
ssize_t strfmon_l(char *restrict s, size_t max, locale_t locale,
const char *restrict format, ...);
Описание (Description)
The strfmon() function formats the specified monetary amount
according to the current locale and format specification format
and places the result in the character array s of size max.
The strfmon_l() function performs the same task, but uses the
locale specified by locale. The behavior of strfmon_l() is
undefined if locale is the special locale object LC_GLOBAL_LOCALE
(see duplocale(3)) or is not a valid locale object handle.
Ordinary characters in format are copied to s without conversion.
Conversion specifiers are introduced by a '%' character.
Immediately following it there can be zero or more of the
following flags:
=f The single-byte character f is used as the numeric fill
character (to be used with a left precision, see below).
When not specified, the space character is used.
^ Do not use any grouping characters that might be defined
for the current locale. By default, grouping is enabled.
( or + The ( flag indicates that negative amounts should be
enclosed between parentheses. The + flag indicates that
signs should be handled in the default way, that is,
amounts are preceded by the locale's sign indication, for
example, nothing for positive, "-" for negative.
! Omit the currency symbol.
- Left justify all fields. The default is right
justification.
Next, there may be a field width: a decimal digit string
specifying a minimum field width in bytes. The default is 0. A
result smaller than this width is padded with spaces (on the
left, unless the left-justify flag was given).
Next, there may be a left precision of the form "#" followed by a
decimal digit string. If the number of digits left of the radix
character is smaller than this, the representation is padded on
the left with the numeric fill character. Grouping characters
are not counted in this field width.
Next, there may be a right precision of the form "." followed by
a decimal digit string. The amount being formatted is rounded to
the specified number of digits prior to formatting. The default
is specified in the frac_digits and int_frac_digits items of the
current locale. If the right precision is 0, no radix character
is printed. (The radix character here is determined by
LC_MONETARY, and may differ from that specified by LC_NUMERIC.)
Finally, the conversion specification must be ended with a
conversion character. The three conversion characters are
% (In this case, the entire specification must be exactly
"%%".) Put a '%' character in the result string.
i One argument of type double is converted using the
locale's international currency format.
n One argument of type double is converted using the
locale's national currency format.
Возвращаемое значение (Return value)
The strfmon() function returns the number of characters placed in
the array s, not including the terminating null byte, provided
the string, including the terminating null byte, fits.
Otherwise, it sets errno to E2BIG, returns -1, and the contents
of the array is undefined.
Атрибуты (Attributes)
For an explanation of the terms used in this section, see
attributes(7).
┌───────────────────────────────┬───────────────┬────────────────┐
│Interface │ Attribute │ Value │
├───────────────────────────────┼───────────────┼────────────────┤
│strfmon() │ Thread safety │ MT-Safe locale │
├───────────────────────────────┼───────────────┼────────────────┤
│strfmon_l() │ Thread safety │ MT-Safe │
└───────────────────────────────┴───────────────┴────────────────┘
Стандарты (Conforming to)
POSIX.1-2001, POSIX.1-2008.
Примеры (Examples)
The call
strfmon(buf, sizeof(buf), "[%^=*#6n] [%=*#6i]",
1234.567, 1234.567);
outputs
[€ **1234,57] [EUR **1 234,57]
in the nl_NL locale. The de_DE, de_CH, en_AU, and en_GB locales
yield
[ **1234,57 €] [ **1.234,57 EUR]
[ Fr. **1234.57] [ CHF **1'234.57]
[ $**1234.57] [ AUD**1,234.57]
[ £**1234.57] [ GBP**1,234.57]
Смотри также (See also)
duplocale(3), setlocale(3), sprintf(3), locale(7)
