# HG changeset patch # User Bruno Haible # Date 1191541193 -7200 # Node ID ec7800681aff53ea977f8a849ddd550151b8ed16 # Parent 8af2c249410b0f00cb33651f20929f16b8159f5a New module 'truncl'. diff --git a/ChangeLog b/ChangeLog --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,15 @@ +2007-10-04 Bruno Haible + + * modules/truncl: New file. + * lib/truncl.c: New file. + * m4/truncl.m4: New file. + * lib/math.in.h (truncl): New declaration. + * m4/math_h.m4 (gl_MATH_H_DEFAULTS): Initialize GNULIB_TRUNCL and + HAVE_DECL_TRUNCL. + * modules/math (Makefile.am): Substitute also GNULIB_TRUNCL and + HAVE_DECL_TRUNCL. + * doc/functions/truncl.texi: Mention the 'truncl' module. + 2007-10-04 Bruno Haible * modules/truncf-tests: New file. diff --git a/doc/functions/truncl.texi b/doc/functions/truncl.texi --- a/doc/functions/truncl.texi +++ b/doc/functions/truncl.texi @@ -4,15 +4,15 @@ POSIX specification: @url{http://www.opengroup.org/susv3xsh/truncl.html} -Gnulib module: --- +Gnulib module: truncl Portability problems fixed by Gnulib: @itemize -@end itemize - -Portability problems not fixed by Gnulib: -@itemize @item This function is missing on some platforms: FreeBSD 5.2.1, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 9, Cygwin, Interix 3.5, BeOS. @end itemize + +Portability problems not fixed by Gnulib: +@itemize +@end itemize diff --git a/lib/math.in.h b/lib/math.in.h --- a/lib/math.in.h +++ b/lib/math.in.h @@ -250,6 +250,19 @@ trunc (x)) #endif +#if @GNULIB_TRUNCL@ +# if !@HAVE_DECL_TRUNCL@ +# define truncl rpl_truncl +extern long double truncl (long double x); +# endif +#elif defined GNULIB_POSIXCHECK +# undef truncl +# define truncl(x) \ + (GL_LINK_WARNING ("truncl is unportable - " \ + "use gnulib module truncl for portability"), \ + truncl (x)) +#endif + #if @GNULIB_SIGNBIT@ # if @REPLACE_SIGNBIT@ diff --git a/lib/truncl.c b/lib/truncl.c new file mode 100644 --- /dev/null +++ b/lib/truncl.c @@ -0,0 +1,21 @@ +/* Round towards zero. + Copyright (C) 2007 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 2, 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, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + +/* Written by Bruno Haible , 2007. */ + +#define USE_LONG_DOUBLE +#include "trunc.c" diff --git a/m4/math_h.m4 b/m4/math_h.m4 --- a/m4/math_h.m4 +++ b/m4/math_h.m4 @@ -26,6 +26,7 @@ GNULIB_SIGNBIT=0; AC_SUBST([GNULIB_SIGNBIT]) GNULIB_TRUNC=0; AC_SUBST([GNULIB_TRUNC]) GNULIB_TRUNCF=0; AC_SUBST([GNULIB_TRUNCF]) + GNULIB_TRUNCL=0; AC_SUBST([GNULIB_TRUNCL]) dnl Assume proper GNU behavior unless another module says otherwise. HAVE_DECL_ACOSL=1; AC_SUBST([HAVE_DECL_ACOSL]) HAVE_DECL_ASINL=1; AC_SUBST([HAVE_DECL_ASINL]) @@ -42,6 +43,7 @@ HAVE_DECL_TANL=1; AC_SUBST([HAVE_DECL_TANL]) HAVE_DECL_TRUNC=1; AC_SUBST([HAVE_DECL_TRUNC]) HAVE_DECL_TRUNCF=1; AC_SUBST([HAVE_DECL_TRUNCF]) + HAVE_DECL_TRUNCL=1; AC_SUBST([HAVE_DECL_TRUNCL]) REPLACE_FREXP=0; AC_SUBST([REPLACE_FREXP]) REPLACE_FREXPL=0; AC_SUBST([REPLACE_FREXPL]) REPLACE_LDEXPL=0; AC_SUBST([REPLACE_LDEXPL]) diff --git a/m4/truncl.m4 b/m4/truncl.m4 new file mode 100644 --- /dev/null +++ b/m4/truncl.m4 @@ -0,0 +1,48 @@ +# truncl.m4 serial 1 +dnl Copyright (C) 2007 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_TRUNCL], +[ + AC_REQUIRE([gl_MATH_H_DEFAULTS]) + dnl Persuade glibc to declare truncl(). + AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) + dnl Test whether truncl() is declared. + AC_CHECK_DECLS([truncl], , , [#include ]) + if test "$ac_cv_have_decl_truncl" = yes; then + dnl Test whether truncl() can be used without libm. + TRUNCL_LIBM=? + AC_TRY_LINK([ + #ifndef __NO_MATH_INLINES + # define __NO_MATH_INLINES 1 /* for glibc */ + #endif + #include + long double x;], + [x = truncl(x);], + [TRUNCL_LIBM=]) + if test "$TRUNCL_LIBM" = "?"; then + save_LIBS="$LIBS" + LIBS="$LIBS -lm" + AC_TRY_LINK([ + #ifndef __NO_MATH_INLINES + # define __NO_MATH_INLINES 1 /* for glibc */ + #endif + #include + long double x;], + [x = truncl(x);], + [TRUNCL_LIBM="-lm"]) + LIBS="$save_LIBS" + fi + if test "$TRUNCL_LIBM" = "?"; then + TRUNCL_LIBM= + fi + else + HAVE_DECL_TRUNCL=0 + AC_LIBOBJ([truncl]) + TRUNCL_LIBM= + fi + AC_SUBST([HAVE_DECL_TRUNCL]) + AC_SUBST([TRUNCL_LIBM]) +]) diff --git a/modules/math b/modules/math --- a/modules/math +++ b/modules/math @@ -29,6 +29,7 @@ -e 's|@''GNULIB_SIGNBIT''@|$(GNULIB_SIGNBIT)|g' \ -e 's|@''GNULIB_TRUNC''@|$(GNULIB_TRUNC)|g' \ -e 's|@''GNULIB_TRUNCF''@|$(GNULIB_TRUNCF)|g' \ + -e 's|@''GNULIB_TRUNCL''@|$(GNULIB_TRUNCL)|g' \ -e 's|@''HAVE_DECL_ACOSL''@|$(HAVE_DECL_ACOSL)|g' \ -e 's|@''HAVE_DECL_ASINL''@|$(HAVE_DECL_ASINL)|g' \ -e 's|@''HAVE_DECL_ATANL''@|$(HAVE_DECL_ATANL)|g' \ @@ -44,6 +45,7 @@ -e 's|@''HAVE_DECL_TANL''@|$(HAVE_DECL_TANL)|g' \ -e 's|@''HAVE_DECL_TRUNC''@|$(HAVE_DECL_TRUNC)|g' \ -e 's|@''HAVE_DECL_TRUNCF''@|$(HAVE_DECL_TRUNCF)|g' \ + -e 's|@''HAVE_DECL_TRUNCL''@|$(HAVE_DECL_TRUNCL)|g' \ -e 's|@''REPLACE_FREXP''@|$(REPLACE_FREXP)|g' \ -e 's|@''REPLACE_FREXPL''@|$(REPLACE_FREXPL)|g' \ -e 's|@''REPLACE_LDEXPL''@|$(REPLACE_LDEXPL)|g' \ diff --git a/modules/truncl b/modules/truncl new file mode 100644 --- /dev/null +++ b/modules/truncl @@ -0,0 +1,31 @@ +Description: +truncl() function: round towards zero. + +Files: +lib/truncl.c +lib/trunc.c +m4/truncl.m4 + +Depends-on: +math +extensions +float + +configure.ac: +gl_FUNC_TRUNCL +gl_MATH_MODULE_INDICATOR([truncl]) + +Makefile.am: + +Include: + + +Link: +$(TRUNCL_LIBM) + +License: +LGPL + +Maintainer: +Bruno Haible +