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vsnprintf-gnu: New module.

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* m4/vsnprintf-posix.m4 (gl_FUNC_VSNPRINTF_IS_POSIX): New macro,
extracted from gl_FUNC_VSNPRINTF_POSIX.
(gl_FUNC_VSNPRINTF_POSIX): Require it. Invoke
gl_PREREQ_VASNPRINTF_WITH_POSIX_EXTRAS.
* m4/vsnprintf-gnu.m4: New file, based on m4/vsnprintf-posix.m4.
* modules/vsnprintf-gnu: New file, based on modules/vasnprintf-gnu.
* doc/posix-functions/vsnprintf.texi: Mention the new module.
This commit is contained in:
Bruno Haible
2023-03-24 11:05:38 +01:00
parent 1bd54c4369
commit 1d4cd9aec7
5 changed files with 88 additions and 21 deletions
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11
ChangeLog
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@@ -1,3 +1,14 @@
2023-03-24 Bruno Haible <bruno@clisp.org>
vsnprintf-gnu: New module.
* m4/vsnprintf-posix.m4 (gl_FUNC_VSNPRINTF_IS_POSIX): New macro,
extracted from gl_FUNC_VSNPRINTF_POSIX.
(gl_FUNC_VSNPRINTF_POSIX): Require it. Invoke
gl_PREREQ_VASNPRINTF_WITH_POSIX_EXTRAS.
* m4/vsnprintf-gnu.m4: New file, based on m4/vsnprintf-posix.m4.
* modules/vsnprintf-gnu: New file, based on modules/vasnprintf-gnu.
* doc/posix-functions/vsnprintf.texi: Mention the new module.
2023-03-23 Bruno Haible <bruno@clisp.org>
vasnprintf-gnu: Add tests.

13
doc/posix-functions/vsnprintf.texi
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@@ -4,9 +4,9 @@
POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/vsnprintf.html}
Gnulib module: vsnprintf or vsnprintf-posix
Gnulib module: vsnprintf or vsnprintf-posix or vsnprintf-gnu
Portability problems fixed by either Gnulib module @code{vsnprintf} or @code{vsnprintf-posix}:
Portability problems fixed by either Gnulib module @code{vsnprintf} or @code{vsnprintf-posix} or @code{vsnprintf-gnu}:
@itemize
@item
This function does not support format directives that access arguments in an
@@ -18,7 +18,7 @@ platforms:
HP-UX 11, IRIX 6.5, Solaris 9, mingw, MSVC 14.
@end itemize
Portability problems fixed by Gnulib module @code{vsnprintf-posix}:
Portability problems fixed by either Gnulib module @code{vsnprintf-posix} or @code{vsnprintf-gnu}:
@itemize
@item
This function does not support size specifiers as in C99 (@code{hh}, @code{ll},
@@ -92,6 +92,13 @@ platforms:
HP-UX 11.
@end itemize
Portability problems fixed by Gnulib module @code{vsnprintf-gnu}:
@itemize
@item
This function does not support the @samp{B} directive on some platforms:
glibc 2.34, FreeBSD 13.1, NetBSD 9.0, OpenBSD 7.2, macOS 12.5, AIX 7.2, Solaris 11.4, and others.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
@item

25
m4/vsnprintf-gnu.m4 Normal file
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@@ -0,0 +1,25 @@
# vsnprintf-gnu.m4 serial 1
dnl Copyright (C) 2023 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_VSNPRINTF_GNU],
[
AC_REQUIRE([gl_FUNC_VSNPRINTF_IS_POSIX])
AC_REQUIRE([gl_PRINTF_DIRECTIVE_UPPERCASE_B])
gl_cv_func_vsnprintf_gnu=no
if test $gl_cv_func_vsnprintf_posix = yes; then
case "$gl_cv_func_printf_directive_uppercase_b" in
*yes)
# vsnprintf exists and is already POSIX compliant and GNU compatible.
gl_cv_func_vsnprintf_gnu=yes
;;
esac
fi
if test $gl_cv_func_vsnprintf_gnu = no; then
gl_PREREQ_VASNPRINTF_WITH_GNU_EXTRAS
gl_REPLACE_VASNPRINTF
gl_REPLACE_VSNPRINTF
fi
])

31
m4/vsnprintf-posix.m4
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@@ -1,10 +1,22 @@
# vsnprintf-posix.m4 serial 17
# vsnprintf-posix.m4 serial 18
dnl Copyright (C) 2007-2023 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_VSNPRINTF_POSIX],
[
AC_REQUIRE([gl_FUNC_VSNPRINTF_IS_POSIX])
if test $gl_cv_func_vsnprintf_posix = no; then
gl_PREREQ_VASNPRINTF_WITH_POSIX_EXTRAS
gl_REPLACE_VASNPRINTF
gl_REPLACE_VSNPRINTF
fi
])
dnl Test whether vsnprintf exists and is POSIX compliant.
dnl Result is gl_cv_func_vsnprintf_posix.
AC_DEFUN([gl_FUNC_VSNPRINTF_IS_POSIX],
[
AC_REQUIRE([gl_PRINTF_SIZES_C99])
AC_REQUIRE([gl_PRINTF_LONG_DOUBLE])
@@ -119,21 +131,4 @@ AC_DEFUN([gl_FUNC_VSNPRINTF_POSIX],
;;
esac
fi
if test $gl_cv_func_vsnprintf_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_B
gl_PREREQ_VASNPRINTF_DIRECTIVE_F
gl_PREREQ_VASNPRINTF_DIRECTIVE_LS
gl_PREREQ_VASNPRINTF_DIRECTIVE_LC
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_VSNPRINTF
fi
])

29
modules/vsnprintf-gnu Normal file
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@@ -0,0 +1,29 @@
Description:
POSIX and GNU compatible vsnprintf() function: print formatted output to
a fixed length string
Comment:
This module should not be used as a dependency from a test module,
otherwise when this module occurs as a tests-related module, it will
have side effects on the compilation of the 'vasnprintf' module, if
that module occurs among the main modules in lib/.
Files:
m4/vsnprintf-gnu.m4
Depends-on:
vsnprintf-posix
configure.ac:
gl_FUNC_VSNPRINTF_GNU
Makefile.am:
Include:
<stdio.h>
License:
LGPL
Maintainer:
all