strfmon(3) - phpMan
STRFMON(3) Linux Programmer's Manual STRFMON(3)
strfmon - convert monetary value to a string
ssize_t strfmon(char *s, size_t max, const char *format, ...);
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 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 pos‐
itive, "-" 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 representa‐
tion 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 format‐
ting. The default is specified in the frac_digits and int_frac_digits items of the cur‐
rent 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
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
n One argument of type double is converted using the locale's national currency for‐
The strfmon() function returns the number of characters placed in the array s, not includ‐
ing 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
Not in POSIX.1-2001. Present on several other systems.
strfmon(buf, sizeof(buf), "[%^=*#6n] [%=*#6i]",
[ 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 spa‐
ces. This may be a bug in the locale files. The Italian, Australian, Swiss, and Por‐
tuguese 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 ]
setlocale(3), sprintf(3), locale(7)
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Linux 2000-12-05 STRFMON(3)