STRFMON(3) Linux Programmer's Manual STRFMON(3)
NAME
strfmon - convert monetary value to a string
SYNOPSIS
#include <monetary.h>
ssize_t strfmon(char *s, size_t max, const char *format, ...);
DESCRIPTION
The strfmon() function formats the specified amounts according to the format specification format and places the result in the character
array s of size max.
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 speci-
fied, 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 han-
dled 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 charac-
ter 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 dif-
fer 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.
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 unde-
fined.
CONFORMING TO
Not in POSIX.1-2001. Present on several other systems.
EXAMPLE
The call
strfmon(buf, sizeof(buf), "[%^=*#6n] [%=*#6i]",
1234.567, 1234.567);
outputs
[ fl **1234,57] [ NLG **1 234,57]
in the Dutch locale (with fl for "florijnen" and NLG for Netherlands Guilders). The grouping character is very ugly because it takes as
much space as a digit, while it should not take more than half that, and will no doubt cause confusion. Surprisingly, the "fl" is preceded
and followed by a space, and "NLG" is preceded by one and followed by two spaces. This may be a bug in the locale files. The Italian,
Australian, Swiss and Portuguese locales yield
[ L. **1235] [ ITL **1.235]
[ $**1234.57] [ AUD **1,234.57]
[Fr. **1234,57] [CHF **1.234,57]
[ **1234$57Esc] [ **1.234$57PTE ]
SEE ALSO
setlocale(3), sprintf(3), locale(7)
COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2000-12-05 STRFMON(3)