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new modules vdprintf, vdprintf-posix


From: Bruno Haible
Subject: new modules vdprintf, vdprintf-posix
Date: Sun, 18 Jan 2009 02:48:18 +0100
User-agent: KMail/1.9.9

Among the new functions in POSIX:2008 is vdprintf(), which does formatted
output to a file descriptor. These two modules implement it.


2009-01-17  Bruno Haible  <address@hidden>

        New modules 'vdprintf', 'vdprintf-posix'.
        * lib/stdio.in.h (vdprintf): New declaration.
        * lib/vdprintf.c: New file.
        * m4/vdprintf.m4: New file.
        * m4/vdprintf-posix.m4: New file.
        * modules/vdprintf: New file.
        * modules/vdprintf-posix: New file.
        * m4/stdio_h.m4 (gl_STDIO_H_DEFAULTS): Initialize GNULIB_VDPRINTF,
        HAVE_VDPRINTF, REPLACE_VDPRINTF.
        * modules/stdio (Makefile.am): Substitute also GNULIB_VDPRINTF,
        HAVE_VDPRINTF, REPLACE_VDPRINTF.
        * doc/posix-functions/vdprintf.texi: Mention the new modules.

==================================== lib/vdprintf.c ===========================
/* Formatted output to a file descriptor.
   Copyright (C) 2009 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

/* Specification.  */
#include <stdio.h>

#include <errno.h>
#include <limits.h>
#include <stdarg.h>
#include <stdlib.h>

#include "full-write.h"
#include "vasnprintf.h"

int
vdprintf (int fd, const char *format, va_list args)
{
  char buf[2000];
  char *output;
  size_t len;
  size_t lenbuf = sizeof (buf);

  output = vasnprintf (buf, &lenbuf, format, args);
  len = lenbuf;

  if (!output)
    return -1;

  if (full_write (fd, output, len) < len)
    {
      if (output != buf)
        {
          int saved_errno = errno;
          free (output);
          errno = saved_errno;
        }
      return -1;
    }

  if (len > INT_MAX)
    {
      errno = EOVERFLOW;
      return -1;
    }

  return len;
}
==================================== m4/vdprintf.m4 ===========================
# vdprintf.m4 serial 1
dnl Copyright (C) 2009 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.

AC_DEFUN([gl_FUNC_VDPRINTF],
[
  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
  AC_CHECK_FUNCS_ONCE([vdprintf])
  if test $ac_cv_func_vdprintf = no; then
    HAVE_VDPRINTF=0
    gl_REPLACE_VDPRINTF
  fi
])

AC_DEFUN([gl_REPLACE_VDPRINTF],
[
  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
  AC_LIBOBJ([vdprintf])
  if test $ac_cv_func_vdprintf = yes; then
    REPLACE_VDPRINTF=1
  fi
  gl_PREREQ_VDPRINTF
])

# Prerequisites of lib/vdprintf.c.
AC_DEFUN([gl_PREREQ_VDPRINTF], [:])
================================= m4/vdprintf-posix.m4 ========================
# vdprintf-posix.m4 serial 1
dnl Copyright (C) 2007-2009 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.

AC_DEFUN([gl_FUNC_VDPRINTF_POSIX],
[
  AC_REQUIRE([gl_PRINTF_SIZES_C99])
  AC_REQUIRE([gl_PRINTF_LONG_DOUBLE])
  AC_REQUIRE([gl_PRINTF_INFINITE])
  AC_REQUIRE([gl_PRINTF_INFINITE_LONG_DOUBLE])
  AC_REQUIRE([gl_PRINTF_DIRECTIVE_A])
  AC_REQUIRE([gl_PRINTF_DIRECTIVE_F])
  AC_REQUIRE([gl_PRINTF_DIRECTIVE_N])
  AC_REQUIRE([gl_PRINTF_POSITIONS])
  AC_REQUIRE([gl_PRINTF_FLAG_GROUPING])
  AC_REQUIRE([gl_PRINTF_FLAG_LEFTADJUST])
  AC_REQUIRE([gl_PRINTF_FLAG_ZERO])
  AC_REQUIRE([gl_PRINTF_PRECISION])
  AC_REQUIRE([gl_PRINTF_ENOMEM])
  gl_cv_func_vdprintf_posix=no
  AC_CHECK_FUNCS_ONCE([vdprintf])
  if test $ac_cv_func_vdprintf = yes; then
    case "$gl_cv_func_printf_sizes_c99" in
      *yes)
        case "$gl_cv_func_printf_long_double" in
          *yes)
            case "$gl_cv_func_printf_infinite" in
              *yes)
                case "$gl_cv_func_printf_infinite_long_double" in
                  *yes)
                    case "$gl_cv_func_printf_directive_a" in
                      *yes)
                        case "$gl_cv_func_printf_directive_f" in
                          *yes)
                            case "$gl_cv_func_printf_directive_n" in
                              *yes)
                                case "$gl_cv_func_printf_positions" in
                                  *yes)
                                    case "$gl_cv_func_printf_flag_grouping" in
                                      *yes)
                                        case 
"$gl_cv_func_printf_flag_leftadjust" in
                                          *yes)
                                            case "$gl_cv_func_printf_flag_zero" 
in
                                              *yes)
                                                case 
"$gl_cv_func_printf_precision" in
                                                  *yes)
                                                    case 
"$gl_cv_func_printf_enomem" in
                                                      *yes)
                                                        # vdprintf exists and is
                                                        # already POSIX 
compliant.
                                                        
gl_cv_func_vdprintf_posix=yes
                                                        ;;
                                                    esac
                                                    ;;
                                                esac
                                                ;;
                                            esac
                                            ;;
                                        esac
                                        ;;
                                    esac
                                    ;;
                                esac
                                ;;
                            esac
                            ;;
                        esac
                        ;;
                    esac
                    ;;
                esac
                ;;
            esac
            ;;
        esac
        ;;
    esac
  fi
  if test $gl_cv_func_vdprintf_posix = no; then
    gl_PREREQ_VASNPRINTF_LONG_DOUBLE
    gl_PREREQ_VASNPRINTF_INFINITE_DOUBLE
    gl_PREREQ_VASNPRINTF_INFINITE_LONG_DOUBLE
    gl_PREREQ_VASNPRINTF_DIRECTIVE_A
    gl_PREREQ_VASNPRINTF_DIRECTIVE_F
    gl_PREREQ_VASNPRINTF_FLAG_GROUPING
    gl_PREREQ_VASNPRINTF_FLAG_LEFTADJUST
    gl_PREREQ_VASNPRINTF_FLAG_ZERO
    gl_PREREQ_VASNPRINTF_PRECISION
    gl_PREREQ_VASNPRINTF_ENOMEM
    gl_REPLACE_VASNPRINTF
    gl_REPLACE_VDPRINTF
  fi
])
=================================== modules/vdprintf ==========================
Description:
vdprintf() function: print formatted output to a file descriptor

Files:
lib/vdprintf.c
m4/vdprintf.m4

Depends-on:
stdio
vasnprintf
full-write
errno

configure.ac:
gl_FUNC_VDPRINTF
gl_STDIO_MODULE_INDICATOR([vdprintf])

Makefile.am:

Include:
<stdio.h>

License:
LGPL

Maintainer:
Bruno Haible

================================ modules/vdprintf-posix =======================
Description:
POSIX compatible vdprintf() function: print formatted output to a file
descriptor

Files:
m4/vdprintf-posix.m4
m4/printf.m4

Depends-on:
vdprintf
vasnprintf
isnand-nolibm
isnanl-nolibm
frexp-nolibm
frexpl-nolibm
printf-frexp
printf-frexpl
signbit
fpucw
nocrash
printf-safe
multiarch

configure.ac:
gl_FUNC_VDPRINTF_POSIX

Makefile.am:

Include:
<stdio.h>

License:
LGPL

Maintainer:
Bruno Haible

===============================================================================
--- lib/stdio.in.h.orig 2009-01-18 02:41:06.000000000 +0100
+++ lib/stdio.in.h      2009-01-18 02:11:00.000000000 +0100
@@ -216,6 +216,22 @@
      vsprintf (b, f, a))
 #endif
 
+#if @GNULIB_VDPRINTF@
+# if @REPLACE_VDPRINTF@
+#  define vdprintf rpl_vdprintf
+# endif
+# if @REPLACE_VDPRINTF@ || address@hidden@
+extern int vdprintf (int fd, const char *format, va_list args)
+       __attribute__ ((__format__ (__printf__, 2, 0)));
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef vdprintf
+# define vdprintf(d,f,a) \
+    (GL_LINK_WARNING ("vdprintf is unportable - " \
+                      "use gnulib module vdprintf for portability"), \
+     vdprintf (d, f, a))
+#endif
+
 #if @GNULIB_VASPRINTF@
 # if @REPLACE_VASPRINTF@
 #  define asprintf rpl_asprintf
--- m4/stdio_h.m4.orig  2009-01-18 02:41:06.000000000 +0100
+++ m4/stdio_h.m4       2009-01-18 02:11:54.000000000 +0100
@@ -1,5 +1,5 @@
-# stdio_h.m4 serial 14
-dnl Copyright (C) 2007-2008 Free Software Foundation, Inc.
+# stdio_h.m4 serial 15
+dnl Copyright (C) 2007-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -53,6 +53,7 @@
   GNULIB_VPRINTF_POSIX=0;        AC_SUBST([GNULIB_VPRINTF_POSIX])
   GNULIB_VSNPRINTF=0;            AC_SUBST([GNULIB_VSNPRINTF])
   GNULIB_VSPRINTF_POSIX=0;       AC_SUBST([GNULIB_VSPRINTF_POSIX])
+  GNULIB_VDPRINTF=0;             AC_SUBST([GNULIB_VDPRINTF])
   GNULIB_VASPRINTF=0;            AC_SUBST([GNULIB_VASPRINTF])
   GNULIB_OBSTACK_PRINTF=0;       AC_SUBST([GNULIB_OBSTACK_PRINTF])
   GNULIB_OBSTACK_PRINTF_POSIX=0; AC_SUBST([GNULIB_OBSTACK_PRINTF_POSIX])
@@ -86,6 +87,8 @@
   HAVE_DECL_VSNPRINTF=1;         AC_SUBST([HAVE_DECL_VSNPRINTF])
   REPLACE_SPRINTF=0;             AC_SUBST([REPLACE_SPRINTF])
   REPLACE_VSPRINTF=0;            AC_SUBST([REPLACE_VSPRINTF])
+  HAVE_VDPRINTF=1;               AC_SUBST([HAVE_VDPRINTF])
+  REPLACE_VDPRINTF=0;            AC_SUBST([REPLACE_VDPRINTF])
   HAVE_VASPRINTF=1;              AC_SUBST([HAVE_VASPRINTF])
   REPLACE_VASPRINTF=0;           AC_SUBST([REPLACE_VASPRINTF])
   HAVE_DECL_OBSTACK_PRINTF=1;    AC_SUBST([HAVE_DECL_OBSTACK_PRINTF])
--- modules/stdio.orig  2009-01-18 02:41:06.000000000 +0100
+++ modules/stdio       2009-01-18 02:11:30.000000000 +0100
@@ -37,6 +37,7 @@
              -e 's|@''GNULIB_VPRINTF_POSIX''@|$(GNULIB_VPRINTF_POSIX)|g' \
              -e 's|@''GNULIB_VSNPRINTF''@|$(GNULIB_VSNPRINTF)|g' \
              -e 's|@''GNULIB_VSPRINTF_POSIX''@|$(GNULIB_VSPRINTF_POSIX)|g' \
+             -e 's|@''GNULIB_VDPRINTF''@|$(GNULIB_VDPRINTF)|g' \
              -e 's|@''GNULIB_VASPRINTF''@|$(GNULIB_VASPRINTF)|g' \
              -e 's|@''GNULIB_OBSTACK_PRINTF''@|$(GNULIB_OBSTACK_PRINTF)|g' \
              -e 
's|@''GNULIB_OBSTACK_PRINTF_POSIX''@|$(GNULIB_OBSTACK_PRINTF_POSIX)|g' \
@@ -69,6 +70,8 @@
              -e 's|@''HAVE_DECL_VSNPRINTF''@|$(HAVE_DECL_VSNPRINTF)|g' \
              -e 's|@''REPLACE_SPRINTF''@|$(REPLACE_SPRINTF)|g' \
              -e 's|@''REPLACE_VSPRINTF''@|$(REPLACE_VSPRINTF)|g' \
+             -e 's|@''HAVE_VDPRINTF''@|$(HAVE_VDPRINTF)|g' \
+             -e 's|@''REPLACE_VDPRINTF''@|$(REPLACE_VDPRINTF)|g' \
              -e 's|@''HAVE_VASPRINTF''@|$(HAVE_VASPRINTF)|g' \
              -e 's|@''REPLACE_VASPRINTF''@|$(REPLACE_VASPRINTF)|g' \
              -e 
's|@''HAVE_DECL_OBSTACK_PRINTF''@|$(HAVE_DECL_OBSTACK_PRINTF)|g' \
--- doc/posix-functions/vdprintf.texi.orig      2009-01-18 02:41:06.000000000 
+0100
+++ doc/posix-functions/vdprintf.texi   2009-01-18 02:39:48.000000000 +0100
@@ -4,15 +4,41 @@
 
 POSIX specification: 
@url{http://www.opengroup.org/onlinepubs/9699919799/functions/vdprintf.html}
 
-Gnulib module: ---
+Gnulib module: vdprintf or vdprintf-posix
 
-Portability problems fixed by Gnulib:
+Portability problems fixed by either Gnulib module @code{vdprintf} or 
@code{vdprintf-posix}:
 @itemize
address@hidden
+This function is missing on some platforms:
+MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, HP-UX 11, IRIX 
6.5, OSF/1 5.1, Solaris 10, Cygwin, mingw, Interix 3.5.
 @end itemize
 
-Portability problems not fixed by Gnulib:
+Portability problems fixed by Gnulib module @code{vdprintf-posix}:
 @itemize
 @item
-This function is missing on some platforms:
-MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, HP-UX 11, IRIX 
6.5, OSF/1 5.1, Solaris 10, Cygwin, mingw, Interix 3.5.
+This function does not support size specifiers as in C99 (@code{hh}, @code{ll},
address@hidden, @code{t}, @code{z}) on some platforms:
+BeOS.
address@hidden
+printf of @samp{long double} numbers is unsupported on some platforms:
+BeOS.
address@hidden
+This function does not support the @samp{a} and @samp{A} directives on some
+platforms:
+glibc-2.3.6, BeOS.
address@hidden
+This function does not support the @samp{F} directive on some platforms:
+BeOS.
address@hidden
+This function does not support format directives that access arguments in an
+arbitrary order, such as @code{"%2$s"}, on some platforms:
+BeOS.
address@hidden
+This function does not support precisions larger than 512 or 1024 in integer,
+floating-point and pointer output on some platforms:
+BeOS.
address@hidden itemize
+
+Portability problems not fixed by Gnulib:
address@hidden
 @end itemize




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