NAME

       strfmon, strfmon_l - convert monetary value to a string

SYNOPSIS

       #include <monetary.h>

       ssize_t strfmon(char *s, size_t max, const char *format,
       ...);

       ssize_t strfmon_l(char *s, size_t max, locale_t locale,
       const char *" format , ...);

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.

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.

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        │
       └────────────┴───────────────┴────────────────┘

CONFORMING TO

       POSIX.1-2001, POSIX.1-2008.

EXAMPLE

       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]

SEE ALSO

       duplocale(3), setlocale(3), sprintf(3), locale(7)

COLOPHON

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