* lib/math.in.h (ilogbf): New declaration.
* lib/ilogbf.c: New file.
* m4/ilogbf.m4: New file.
* m4/math_h.m4 (gl_MATH_H): Test whether ilogbf is declared.
(gl_MATH_H_DEFAULTS): Initialize GNULIB_ILOGBF, HAVE_ILOGBF,
REPLACE_ILOGBF.
* modules/math (Makefile.am): Substitute GNULIB_ILOGBF, HAVE_ILOGBF,
REPLACE_ILOGBF.
* modules/ilogbf: New file.
* tests/test-math-c++.cc: Check the declaration of ilogbf.
* doc/posix-functions/ilogbf.texi: Mention the new module.
+2012-04-03 Bruno Haible <bruno@clisp.org>
+
+ New module 'ilogbf'.
+ * lib/math.in.h (ilogbf): New declaration.
+ * lib/ilogbf.c: New file.
+ * m4/ilogbf.m4: New file.
+ * m4/math_h.m4 (gl_MATH_H): Test whether ilogbf is declared.
+ (gl_MATH_H_DEFAULTS): Initialize GNULIB_ILOGBF, HAVE_ILOGBF,
+ REPLACE_ILOGBF.
+ * modules/math (Makefile.am): Substitute GNULIB_ILOGBF, HAVE_ILOGBF,
+ REPLACE_ILOGBF.
+ * modules/ilogbf: New file.
+ * tests/test-math-c++.cc: Check the declaration of ilogbf.
+ * doc/posix-functions/ilogbf.texi: Mention the new module.
+
2012-04-03 Bruno Haible <bruno@clisp.org>
Tests for module 'ilogb'.
POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/ilogbf.html}
-Gnulib module: ---
+Gnulib module: ilogbf
Portability problems fixed by Gnulib:
@itemize
+@item
+This function is missing on some platforms:
+Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 9, MSVC 9.
+@item
+This function returns a wrong result for a zero argument on some platforms:
+OpenBSD 4.9.
+@item
+This function returns a wrong result for an infinite argument on some platforms:
+NetBSD 5.1, OpenBSD 4.9.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
-@item
-This function is missing on some platforms:
-Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 9, MSVC 9.
@end itemize
--- /dev/null
+/* Floating-point exponent.
+ 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>
+
+#define USE_FLOAT
+#include "ilogb.c"
#endif
+#if @GNULIB_ILOGBF@
+# if @REPLACE_ILOGBF@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef ilogbf
+# define ilogbf rpl_ilogbf
+# endif
+_GL_FUNCDECL_RPL (ilogbf, int, (float x));
+_GL_CXXALIAS_RPL (ilogbf, int, (float x));
+# else
+# if !@HAVE_ILOGBF@
+_GL_FUNCDECL_SYS (ilogbf, int, (float x));
+# endif
+_GL_CXXALIAS_SYS (ilogbf, int, (float x));
+# endif
+_GL_CXXALIASWARN (ilogbf);
+#elif defined GNULIB_POSIXCHECK
+# undef ilogbf
+# if HAVE_RAW_DECL_ILOGBF
+_GL_WARN_ON_USE (ilogbf, "ilogbf is unportable - "
+ "use gnulib module ilogbf for portability");
+# endif
+#endif
+
#if @GNULIB_ILOGB@
# if @REPLACE_ILOGB@
# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
--- /dev/null
+# ilogbf.m4 serial 1
+dnl Copyright (C) 2010-2012 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_ILOGBF],
+[
+ AC_REQUIRE([gl_MATH_H_DEFAULTS])
+
+ dnl Persuade glibc <math.h> to declare ilogbf().
+ AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
+ dnl Determine ILOGBF_LIBM.
+ gl_MATHFUNC([ilogbf], [int], [(float)])
+ if test $gl_cv_func_ilogbf_no_libm = yes \
+ || test $gl_cv_func_ilogbf_in_libm = yes; then
+ save_LIBS="$LIBS"
+ LIBS="$LIBS $ILOGBF_LIBM"
+ gl_FUNC_ILOGBF_WORKS
+ LIBS="$save_LIBS"
+ case "$gl_cv_func_ilogbf_works" in
+ *yes) ;;
+ *) REPLACE_ILOGBF=1 ;;
+ esac
+ else
+ HAVE_ILOGBF=0
+ fi
+ if test $HAVE_ILOGBF = 0 || test $REPLACE_ILOGBF = 1; then
+ dnl Find libraries needed to link lib/ilogbf.c.
+ AC_REQUIRE([gl_FUNC_FREXPF])
+ AC_REQUIRE([gl_FUNC_ISNANF])
+ ILOGBF_LIBM=
+ dnl Append $FREXPF_LIBM to ILOGBF_LIBM, avoiding gratuitous duplicates.
+ case " $ILOGBF_LIBM " in
+ *" $FREXPF_LIBM "*) ;;
+ *) ILOGBF_LIBM="$ILOGBF_LIBM $FREXPF_LIBM" ;;
+ esac
+ dnl Append $ISNANF_LIBM to ILOGBF_LIBM, avoiding gratuitous duplicates.
+ case " $ILOGBF_LIBM " in
+ *" $ISNANF_LIBM "*) ;;
+ *) ILOGBF_LIBM="$ILOGBF_LIBM $ISNANF_LIBM" ;;
+ esac
+ fi
+ AC_SUBST([ILOGBF_LIBM])
+])
+
+dnl Test whether ilogbf() works.
+dnl On OpenBSD 4.9, ilogbf(0.0) is wrong.
+dnl On NetBSD 5.1, OpenBSD 4.9, ilogbf(Infinity) is wrong.
+AC_DEFUN([gl_FUNC_ILOGBF_WORKS],
+[
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CACHE_CHECK([whether ilogbf works], [gl_cv_func_ilogbf_works],
+ [
+ AC_RUN_IFELSE(
+ [AC_LANG_SOURCE([[
+#include <limits.h>
+#include <math.h>
+/* Provide FP_ILOGB0, FP_ILOGBNAN, like in math.in.h. */
+#if !(defined FP_ILOGB0 && defined FP_ILOGBNAN)
+# if defined __NetBSD__ || defined __sgi
+ /* NetBSD, IRIX 6.5: match what ilogbf() does */
+# define FP_ILOGB0 INT_MIN
+# define FP_ILOGBNAN INT_MIN
+# elif defined _AIX
+ /* AIX 5.1: match what ilogbf() does in AIX >= 5.2 */
+# define FP_ILOGB0 INT_MIN
+# define FP_ILOGBNAN INT_MAX
+# elif defined __sun
+ /* Solaris 9: match what ilogbf() does */
+# define FP_ILOGB0 (- INT_MAX)
+# define FP_ILOGBNAN INT_MAX
+# endif
+#endif
+volatile float x;
+static float zero;
+static int dummy (float x) { return 0; }
+int main (int argc, char *argv[])
+{
+ int (*my_ilogbf) (float) = argc ? ilogbf : dummy;
+ int result = 0;
+ /* This test fails on OpenBSD 4.9. */
+ {
+ x = 0.0f;
+ if (my_ilogbf (x) != FP_ILOGB0)
+ result |= 1;
+ }
+ /* This test fails on NetBSD 5.1, OpenBSD 4.9. */
+ {
+ x = 1.0f / zero;
+ if (my_ilogbf (x) != INT_MAX)
+ result |= 2;
+ }
+ return result;
+}
+]])],
+ [gl_cv_func_ilogbf_works=yes],
+ [gl_cv_func_ilogbf_works=no],
+ [case "$host_os" in
+ openbsd* | netbsd*) gl_cv_func_ilogbf_works="guessing no";;
+ *) gl_cv_func_ilogbf_works="guessing yes";;
+ esac
+ ])
+ ])
+])
-# math_h.m4 serial 111
+# math_h.m4 serial 112
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,
expf expl exp2 exp2f exp2l expm1 expm1f expm1l
fabsf fabsl floorf floorl fma fmaf fmal
fmod fmodf fmodl frexpf frexpl hypotf hypotl
- ilogb
+ ilogb ilogbf
ldexpf ldexpl
log logf logl log10 log10f log10l log1p log1pf log1pl log2 log2f log2l
logb logbf logbl
GNULIB_HYPOTF=0; AC_SUBST([GNULIB_HYPOTF])
GNULIB_HYPOTL=0; AC_SUBST([GNULIB_HYPOTL])
GNULIB_ILOGB=0; AC_SUBST([GNULIB_ILOGB])
+ GNULIB_ILOGBF=0; AC_SUBST([GNULIB_ILOGBF])
GNULIB_ISFINITE=0; AC_SUBST([GNULIB_ISFINITE])
GNULIB_ISINF=0; AC_SUBST([GNULIB_ISINF])
GNULIB_ISNAN=0; AC_SUBST([GNULIB_ISNAN])
HAVE_HYPOTF=1; AC_SUBST([HAVE_HYPOTF])
HAVE_HYPOTL=1; AC_SUBST([HAVE_HYPOTL])
HAVE_ILOGB=1; AC_SUBST([HAVE_ILOGB])
+ HAVE_ILOGBF=1; AC_SUBST([HAVE_ILOGBF])
HAVE_ISNANF=1; AC_SUBST([HAVE_ISNANF])
HAVE_ISNAND=1; AC_SUBST([HAVE_ISNAND])
HAVE_ISNANL=1; AC_SUBST([HAVE_ISNANL])
REPLACE_HYPOTF=0; AC_SUBST([REPLACE_HYPOTF])
REPLACE_HYPOTL=0; AC_SUBST([REPLACE_HYPOTL])
REPLACE_ILOGB=0; AC_SUBST([REPLACE_ILOGB])
+ REPLACE_ILOGBF=0; AC_SUBST([REPLACE_ILOGBF])
REPLACE_ISFINITE=0; AC_SUBST([REPLACE_ISFINITE])
REPLACE_ISINF=0; AC_SUBST([REPLACE_ISINF])
REPLACE_ISNAN=0; AC_SUBST([REPLACE_ISNAN])
--- /dev/null
+Description:
+ilogbf() function: get exponent as integer.
+
+Files:
+lib/ilogbf.c
+lib/ilogb.c
+m4/ilogbf.m4
+m4/mathfunc.m4
+
+Depends-on:
+math
+extensions
+isfinite [test $HAVE_ILOGBF = 0 || test $REPLACE_ILOGBF = 1]
+frexpf [test $HAVE_ILOGBF = 0 || test $REPLACE_ILOGBF = 1]
+isnanf [test $HAVE_ILOGBF = 0 || test $REPLACE_ILOGBF = 1]
+
+configure.ac:
+gl_FUNC_ILOGBF
+if test $HAVE_ILOGBF = 0 || test $REPLACE_ILOGBF = 1; then
+ AC_LIBOBJ([ilogbf])
+fi
+gl_MATH_MODULE_INDICATOR([ilogbf])
+
+Makefile.am:
+
+Include:
+<math.h>
+
+Link:
+$(ILOGBF_LIBM)
+
+License:
+LGPL
+
+Maintainer:
+Bruno Haible
-e 's/@''GNULIB_HYPOTF''@/$(GNULIB_HYPOTF)/g' \
-e 's/@''GNULIB_HYPOTL''@/$(GNULIB_HYPOTL)/g' \
-e 's/@''GNULIB_ILOGB''@/$(GNULIB_ILOGB)/g' \
+ -e 's/@''GNULIB_ILOGBF''@/$(GNULIB_ILOGBF)/g' \
-e 's/@''GNULIB_ISFINITE''@/$(GNULIB_ISFINITE)/g' \
-e 's/@''GNULIB_ISINF''@/$(GNULIB_ISINF)/g' \
-e 's/@''GNULIB_ISNAN''@/$(GNULIB_ISNAN)/g' \
-e 's|@''HAVE_HYPOTF''@|$(HAVE_HYPOTF)|g' \
-e 's|@''HAVE_HYPOTL''@|$(HAVE_HYPOTL)|g' \
-e 's|@''HAVE_ILOGB''@|$(HAVE_ILOGB)|g' \
+ -e 's|@''HAVE_ILOGBF''@|$(HAVE_ILOGBF)|g' \
-e 's|@''HAVE_ISNANF''@|$(HAVE_ISNANF)|g' \
-e 's|@''HAVE_ISNAND''@|$(HAVE_ISNAND)|g' \
-e 's|@''HAVE_ISNANL''@|$(HAVE_ISNANL)|g' \
-e 's|@''REPLACE_HYPOTF''@|$(REPLACE_HYPOTF)|g' \
-e 's|@''REPLACE_HYPOTL''@|$(REPLACE_HYPOTL)|g' \
-e 's|@''REPLACE_ILOGB''@|$(REPLACE_ILOGB)|g' \
+ -e 's|@''REPLACE_ILOGBF''@|$(REPLACE_ILOGBF)|g' \
-e 's|@''REPLACE_ISFINITE''@|$(REPLACE_ISFINITE)|g' \
-e 's|@''REPLACE_ISINF''@|$(REPLACE_ISINF)|g' \
-e 's|@''REPLACE_ISNAN''@|$(REPLACE_ISNAN)|g' \
(long double, long double));
#endif
+#if GNULIB_TEST_ILOGBF
+SIGNATURE_CHECK (GNULIB_NAMESPACE::ilogbf, int, (float));
+#endif
#if GNULIB_TEST_ILOGB
SIGNATURE_CHECK (GNULIB_NAMESPACE::ilogb, int, (double));
#endif