@node snprintf
@section @code{snprintf}
@findex snprintf

POSIX specification: @url{http://www.opengroup.org/susv3xsh/snprintf.html}

Gnulib module: snprintf or snprintf-posix

Portability problems fixed by either Gnulib module @code{snprintf} or @code{snprintf-posix}:
@itemize
@item
This function is missing on some platforms:
OSF/1 4.0, Solaris 2.5.1.
@end itemize

Portability problems fixed by Gnulib module @code{snprintf-posix}:
@itemize
@item
This function does not support size specifiers as in C99 (@code{hh}, @code{ll},
@code{j}, @code{t}, @code{z}) on some platforms:
AIX 5.1, HP-UX 11.23, IRIX 6.5, OSF/1 5.1, Solaris 9, Cygwin 2006, mingw, BeOS.
@item
This function does not support the @samp{a} and @samp{A} directives on some
platforms:
glibc-2.3.6, MacOS X 10.3, NetBSD 3.0, OpenBSD 4.0, AIX 5.2, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin, mingw, BeOS.
@item
This function does not support the @samp{F} directive on some platforms:
NetBSD 3.0, AIX 5.1, HP-UX 11.23, IRIX 6.5, OSF/1 5.1, Solaris 9, Cygwin, mingw, BeOS.
@item
This function does not support format directives that access arguments in an
arbitrary order, such as @code{"%2$s"}, on some platforms:
NetBSD 3.0, mingw, BeOS.
@item
This function doesn't support the @code{'} flag on some platforms:
NetBSD 3.0, mingw.
@item
This function does not truncate the result as specified in C99 on some platforms:
mingw.
@item
This function does not return a byte count as specified in C99 on some platforms:
HP-UX 11, IRIX 6.5, OSF/1 5.1, mingw.
@item
This function does not fully support the @samp{n} directive on some platforms:
HP-UX 11, mingw.
@item
This function overwrites memory even when a zero size argument is passed on some
platforms:
OSF/1 5.1.
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@item
printf @code{"%010f"} of NaN and Infinity yields an incorrect result (padded
with zeroes) on some platforms:
FreeBSD 6.0.
@item
printf of @samp{long double} numbers is unsupported on some platforms:
mingw.
@end itemize