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Manual Pages  — STRFMON


strfmon – convert monetary value to string



Standard C Library (libc, -lc)


#include <monetary.h>

strfmon(char * restrict s, size_t maxsize, const char * restrict format, ...);

strfmon_l(char * restrict s, size_t maxsize, locale_t loc, const char * restrict format, ...);


The strfmon() function places characters into the array pointed to by s as controlled by the string pointed to by format. No more than maxsize bytes are placed into the array.

The strfmon_l() function does the same as strfmon() but takes an explicit locale rather than using the current locale.

The format string is composed of zero or more directives: ordinary characters (not %), which are copied unchanged to the output stream; and conversion specifications, each of which results in fetching zero or more subsequent arguments. Each conversion specification is introduced by the % character. After the %, the following appear in sequence:


If the total number of resulting bytes including the terminating NUL byte is not more than maxsize, strfmon() returns the number of bytes placed into the array pointed to by s, not including the terminating NUL byte. Otherwise, -1 is returned, the contents of the array are indeterminate, and errno is set to indicate the error.

The strfmon_l() function returns the same values as strfmon().


The strfmon() function will fail if:
  Conversion stopped due to lack of space in the buffer.
  The format string is invalid.
  Not enough memory for temporary buffers.




The strfmon() function conforms to IEEE Std 1003.1-2001 ("POSIX.1"). The strfmon_l() function conforms to IEEE Std 1003.1-2008 ("POSIX.1").


The strfmon() function was implemented by Alexey Zelkin <Mt phantom@FreeBSD.org>.

This manual page was written by Jeroen Ruigrok van der Werven <Mt asmodai@FreeBSD.org> based on the standards' text.


The strfmon() function does not correctly handle multibyte characters in the format argument.

STRFMON (3) June 25, 2012

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