* lib/math.in.h (modfl): New declaration.
* lib/modfl.c: New file.
* m4/modfl.m4: New file.
* m4/math_h.m4 (gl_MATH_H): Test whether modfl is declared.
(gl_MATH_H_DEFAULTS): Initialize GNULIB_MODFL, HAVE_MODFL.
* modules/math (Makefile.am): Substitute GNULIB_MODFL, HAVE_MODFL.
* modules/modfl: New file.
* doc/posix-functions/modfl.texi: Mention the new module.
+2012-02-25 Bruno Haible <bruno@clisp.org>
+
+ New module 'modfl'.
+ * lib/math.in.h (modfl): New declaration.
+ * lib/modfl.c: New file.
+ * m4/modfl.m4: New file.
+ * m4/math_h.m4 (gl_MATH_H): Test whether modfl is declared.
+ (gl_MATH_H_DEFAULTS): Initialize GNULIB_MODFL, HAVE_MODFL.
+ * modules/math (Makefile.am): Substitute GNULIB_MODFL, HAVE_MODFL.
+ * modules/modfl: New file.
+ * doc/posix-functions/modfl.texi: Mention the new module.
+
2012-02-25 Bruno Haible <bruno@clisp.org>
Tests for module 'fabsl'.
POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/modfl.html}
-Gnulib module: ---
+Gnulib module: modfl
Portability problems fixed by Gnulib:
@itemize
-@end itemize
-
-Portability problems not fixed by Gnulib:
-@itemize
@item
This function is missing on some platforms:
FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, HP-UX 11, IRIX 6.5, Solaris 9, Cygwin, Interix 3.5.
This function is only defined as a macro with arguments on some platforms:
MSVC 9.
@end itemize
+
+Portability problems not fixed by Gnulib:
+@itemize
+@end itemize
# endif
#endif
+#if @GNULIB_MODFL@
+# if !@HAVE_MODFL@
+# undef modfl
+_GL_FUNCDECL_SYS (modfl, long double, (long double x, long double *iptr)
+ _GL_ARG_NONNULL ((2)));
+# endif
+_GL_CXXALIAS_SYS (modfl, long double, (long double x, long double *iptr));
+_GL_CXXALIASWARN (modfl);
+#elif defined GNULIB_POSIXCHECK
+# undef modfl
+# if HAVE_RAW_DECL_MODFL
+_GL_WARN_ON_USE (modfl, "modfl is unportable - "
+ "use gnulib module modfl for portability");
+# endif
+#endif
+
#if @GNULIB_POWF@
# if !@HAVE_POWF@
--- /dev/null
+/* Get signed integer and fractional parts of a floating-point number.
+ Copyright (C) 2012 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/>. */
+
+#include <config.h>
+
+/* Specification. */
+#include <math.h>
+
+#if HAVE_SAME_LONG_DOUBLE_AS_DOUBLE
+
+long double
+modfl (long double x, long double *iptr)
+{
+ double integer_part;
+ double fractional_part = modf (x, &integer_part);
+ *iptr = integer_part;
+ return fractional_part;
+}
+
+#else
+
+long double
+modfl (long double x, long double *iptr)
+{
+ long double integer_part = truncl (x);
+ *iptr = integer_part;
+ return x - integer_part;
+}
+
+#endif
-# math_h.m4 serial 57
+# math_h.m4 serial 58
dnl Copyright (C) 2007-2012 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
[acosf acosl asinf asinl atanf atanl
ceilf ceill copysign copysignf copysignl cosf cosl coshf
expf expl fabsf fabsl floorf floorl fma fmaf fmal fmodf frexpf frexpl
- ldexpf ldexpl logb logf logl log10f modff powf
+ ldexpf ldexpl logb logf logl log10f modff modfl powf
rint rintf rintl round roundf roundl sinf sinl sinhf sqrtf sqrtl
tanf tanl tanhf trunc truncf truncl])
])
GNULIB_LOGL=0; AC_SUBST([GNULIB_LOGL])
GNULIB_LOG10F=0; AC_SUBST([GNULIB_LOG10F])
GNULIB_MODFF=0; AC_SUBST([GNULIB_MODFF])
+ GNULIB_MODFL=0; AC_SUBST([GNULIB_MODFL])
GNULIB_POWF=0; AC_SUBST([GNULIB_POWF])
GNULIB_RINT=0; AC_SUBST([GNULIB_RINT])
GNULIB_RINTF=0; AC_SUBST([GNULIB_RINTF])
HAVE_LOGL=1; AC_SUBST([HAVE_LOGL])
HAVE_LOG10F=1; AC_SUBST([HAVE_LOG10F])
HAVE_MODFF=1; AC_SUBST([HAVE_MODFF])
+ HAVE_MODFL=1; AC_SUBST([HAVE_MODFL])
HAVE_POWF=1; AC_SUBST([HAVE_POWF])
HAVE_RINT=1; AC_SUBST([HAVE_RINT])
HAVE_RINTF=1; AC_SUBST([HAVE_RINTF])
--- /dev/null
+# modfl.m4 serial 1
+dnl Copyright (C) 2011-2012 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_MODFL],
+[
+ AC_REQUIRE([gl_MATH_H_DEFAULTS])
+ AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
+
+ dnl Test whether modfl() exists. We cannot assume that modfl(), if it
+ dnl exists, is defined in the same library as modf(). This is not the case
+ dnl on FreeBSD, Solaris.
+ gl_MATHFUNC([modfl], [long double], [(long double, long double *)])
+ if test $gl_cv_func_modfl_no_libm = no \
+ && test $gl_cv_func_modfl_in_libm = no; then
+ HAVE_MODFL=0
+ if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
+ AC_REQUIRE([gl_FUNC_MODF])
+ MODFL_LIBM="$MODF_LIBM"
+ else
+ AC_REQUIRE([gl_FUNC_TRUNCL])
+ MODFL_LIBM="$TRUNCL_LIBM"
+ fi
+ fi
+ AC_SUBST([MODFL_LIBM])
+])
-e 's/@''GNULIB_LOGL''@/$(GNULIB_LOGL)/g' \
-e 's/@''GNULIB_LOG10F''@/$(GNULIB_LOG10F)/g' \
-e 's/@''GNULIB_MODFF''@/$(GNULIB_MODFF)/g' \
+ -e 's/@''GNULIB_MODFL''@/$(GNULIB_MODFL)/g' \
-e 's/@''GNULIB_POWF''@/$(GNULIB_POWF)/g' \
-e 's/@''GNULIB_RINT''@/$(GNULIB_RINT)/g' \
-e 's/@''GNULIB_RINTF''@/$(GNULIB_RINTF)/g' \
-e 's|@''HAVE_LOGL''@|$(HAVE_LOGL)|g' \
-e 's|@''HAVE_LOG10F''@|$(HAVE_LOG10F)|g' \
-e 's|@''HAVE_MODFF''@|$(HAVE_MODFF)|g' \
+ -e 's|@''HAVE_MODFL''@|$(HAVE_MODFL)|g' \
-e 's|@''HAVE_POWF''@|$(HAVE_POWF)|g' \
-e 's|@''HAVE_RINT''@|$(HAVE_RINT)|g' \
-e 's|@''HAVE_RINTF''@|$(HAVE_RINTF)|g' \
--- /dev/null
+Description:
+modfl() function: get signed integer and fractional parts.
+
+Files:
+lib/modfl.c
+m4/modfl.m4
+m4/mathfunc.m4
+
+Depends-on:
+math
+modf [test $HAVE_MODFL = 0 && test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1]
+truncl [test $HAVE_MODFL = 0 && test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 0]
+
+configure.ac:
+gl_FUNC_MODFL
+if test $HAVE_MODFL = 0; then
+ AC_LIBOBJ([modfl])
+fi
+gl_MATH_MODULE_INDICATOR([modfl])
+
+Makefile.am:
+
+Include:
+<math.h>
+
+Link:
+$(MODFL_LIBM)
+
+License:
+LGPL
+
+Maintainer:
+Bruno Haible