2 @section @code{vsnprintf}
5 POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/vsnprintf.html}
7 Gnulib module: vsnprintf or vsnprintf-posix
9 Portability problems fixed by either Gnulib module @code{vsnprintf} or @code{vsnprintf-posix}:
12 This function is missing on some platforms:
13 IRIX 5.3, OSF/1 4.0, Solaris 2.5.1.
15 This function does not support format directives that access arguments in an
16 arbitrary order, such as @code{"%2$s"}, on some platforms:
17 NetBSD 3.0, mingw, MSVC 9, BeOS.
19 This function overwrites memory even when a size argument of 1 is passed on some
23 This function does not return a byte count as specified in C99 on some
25 HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 9, mingw, MSVC 9.
28 Portability problems fixed by Gnulib module @code{vsnprintf-posix}:
31 This function does not support size specifiers as in C99 (@code{hh}, @code{ll},
32 @code{j}, @code{t}, @code{z}) on some platforms:
33 AIX 5.1, HP-UX 11.23, IRIX 6.5, OSF/1 5.1, Solaris 9, Cygwin 1.5.24, mingw, MSVC 9, BeOS.
35 printf of @samp{long double} numbers is unsupported on some platforms:
38 printf @code{"%f"}, @code{"%e"}, @code{"%g"} of Infinity and NaN yields an
39 incorrect result on some platforms:
40 AIX 5.2, OSF/1 5.1, Solaris 11 2011-11, mingw, MSVC 9.
42 This function does not support the @samp{a} and @samp{A} directives on some
44 glibc-2.3.6, Mac OS X 10.5, NetBSD 5.0, OpenBSD 4.0, AIX 5.2, HP-UX 11,
45 IRIX 6.5, OSF/1 5.1, Solaris 11 2011-11, Cygwin 1.5.x, mingw, MSVC 9, BeOS.
47 This function does not support the @samp{F} directive on some platforms:
48 NetBSD 3.0, AIX 5.1, HP-UX 11.23, IRIX 6.5, OSF/1 5.1, Solaris 9,
49 Cygwin 1.5.x, mingw, MSVC 9, BeOS.
51 This function does not support the @samp{ls} directive on some platforms:
52 OpenBSD 4.0, IRIX 6.5, Solaris 2.6, Cygwin 1.5.x, Haiku.
54 This function does not support precisions in the @samp{ls} directive correctly
58 This function doesn't support the @code{'} flag on some platforms:
59 NetBSD 3.0, Cygwin 1.5.24, mingw, MSVC 9.
61 This function behaves incorrectly when a @samp{-} flag and a negative width
62 are specified together, on some platforms:
65 printf @code{"%010f"} of NaN and Infinity yields an incorrect result (padded
66 with zeroes) on some platforms:
67 Mac OS X 10.5, FreeBSD 6.0, NetBSD 5.0, AIX 5.2, IRIX 6.5, OSF/1 5.1, Solaris 11 2011-11, Cygwin 1.5.x, mingw, MSVC 9.
69 This function does not support precisions larger than 512 or 1024 in integer,
70 floating-point and pointer output on some platforms:
71 AIX 7.1, Solaris 10/x86, mingw, MSVC 9, BeOS.
73 This function mishandles large floating point precisions
74 (for example, formatting 1.0 with @samp{"%.511f"})
78 This function can crash in out-of-memory conditions on some platforms:
79 Mac OS X 10.3, FreeBSD 6.0, NetBSD 5.0.
81 This function does not truncate the result as specified in C99 on some platforms:
84 This function does not fully support the @samp{n} directive on some platforms:
85 HP-UX 11, mingw, MSVC 9.
87 This function overwrites memory even when a zero size argument is passed on some
92 Portability problems not fixed by Gnulib:
95 Formatting noncanonical @samp{long double} numbers produces
96 nonmeaningful results on some platforms:
97 glibc and others, on x86, x86_64, IA-64 CPUs.
99 When formatting an integer with grouping flag, this function inserts thousands
100 separators even in the "C" locale on some platforms: