Another 'long double' function: modfl().
2012-02-25 Bruno Haible <[email protected]> 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. ================================= lib/modfl.c ================================= /* 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 ================================= m4/modfl.m4 ================================= # 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]) ]) ================================ modules/modfl ================================ 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 =============================================================================== --- doc/posix-functions/modfl.texi.orig Sat Feb 25 15:17:49 2012 +++ doc/posix-functions/modfl.texi Sat Feb 25 13:37:25 2012 @@ -4,14 +4,10 @@ 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. @@ -19,3 +15,7 @@ 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 --- lib/math.in.h.orig Sat Feb 25 15:17:49 2012 +++ lib/math.in.h Sat Feb 25 13:39:37 2012 @@ -841,6 +841,22 @@ # 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@ --- m4/math_h.m4.orig Sat Feb 25 15:17:50 2012 +++ m4/math_h.m4 Sat Feb 25 13:40:30 2012 @@ -1,4 +1,4 @@ -# 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, @@ -42,7 +42,7 @@ [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]) ]) @@ -101,6 +101,7 @@ 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]) @@ -151,6 +152,7 @@ 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]) --- modules/math.orig Sat Feb 25 15:17:50 2012 +++ modules/math Sat Feb 25 13:41:08 2012 @@ -71,6 +71,7 @@ -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' \ @@ -121,6 +122,7 @@ -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' \
