| @node dprintf |
| @section @code{dprintf} |
| @findex dprintf |
| |
| POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/dprintf.html} |
| |
| Gnulib module: dprintf or dprintf-posix |
| |
| Portability problems fixed by either Gnulib module @code{dprintf} or @code{dprintf-posix}: |
| @itemize |
| @item |
| This function is missing on many non-glibc platforms: |
| Mac OS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 11.3, Cygwin 1.5.x, mingw, MSVC 14. |
| @end itemize |
| |
| Portability problems fixed by Gnulib module @code{dprintf-posix}: |
| @itemize |
| @item |
| printf @code{"%f"}, @code{"%e"}, @code{"%g"} of Infinity and NaN yields an |
| incorrect result on some platforms: |
| Solaris 11.4. |
| @item |
| This function does not support the @samp{a} and @samp{A} directives on some |
| platforms: |
| glibc-2.3.6. |
| @item |
| printf @code{"%010f"} of NaN and Infinity yields an incorrect result (padded |
| with zeroes, or wrong capitalization) on some platforms: |
| Solaris 11.4. |
| @item |
| This function does not support precisions larger than 512 or 1024 in integer, |
| floating-point and pointer output on some platforms: |
| AIX 7.1. |
| @end itemize |
| |
| Portability problems not fixed by Gnulib: |
| @itemize |
| @item |
| The @code{%m} directive is not portable, use @code{%s} mapped to an |
| argument of @code{strerror(errno)} (or a version of @code{strerror_r}) |
| instead. |
| @item |
| Formatting noncanonical @samp{long double} numbers produces |
| nonmeaningful results on some platforms: |
| glibc and others, on x86, x86_64, IA-64 CPUs. |
| @item |
| When formatting an integer with grouping flag, this function inserts thousands |
| separators even in the "C" locale on some platforms: |
| NetBSD 5.1. |
| @item |
| On some platforms, this function does not set @code{errno} or the |
| stream error indicator on attempts to write to a read-only stream: |
| Cygwin 1.7.9. |
| @end itemize |