/* A GNU-like <math.h>.
- Copyright (C) 2002-2003, 2007-2008 Free Software Foundation, Inc.
+ Copyright (C) 2002-2003, 2007-2010 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
#ifndef _GL_MATH_H
+#if __GNUC__ >= 3
@PRAGMA_SYSTEM_HEADER@
+#endif
/* The include_next requires a split double-inclusion guard. */
-#@INCLUDE_NEXT@ @NEXT_MATH_H@
+#@INCLUDE_NEXT_AS_FIRST_DIRECTIVE@ @NEXT_AS_FIRST_DIRECTIVE_MATH_H@
#ifndef _GL_MATH_H
#define _GL_MATH_H
-/* The definition of GL_LINK_WARNING is copied here. */
-
-
-#ifdef __cplusplus
-extern "C" {
-#endif
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
+
+/* The definition of _GL_ARG_NONNULL is copied here. */
+
+/* The definition of _GL_WARN_ON_USE is copied here. */
+
+/* Helper macros to define a portability warning for the
+ classification macro FUNC called with VALUE. POSIX declares the
+ classification macros with an argument of real-floating (that is,
+ one of float, double, or long double). */
+#define _GL_WARN_REAL_FLOATING_DECL(func) \
+static inline int \
+rpl_ ## func ## f (float f) \
+{ \
+ return func (f); \
+} \
+static inline int \
+rpl_ ## func ## d (double d) \
+{ \
+ return func (d); \
+} \
+static inline int \
+rpl_ ## func ## l (long double l) \
+{ \
+ return func (l); \
+} \
+_GL_WARN_ON_USE (rpl_ ## func ## f, #func " is unportable - " \
+ "use gnulib module " #func " for portability"); \
+_GL_WARN_ON_USE (rpl_ ## func ## d, #func " is unportable - " \
+ "use gnulib module " #func " for portability"); \
+_GL_WARN_ON_USE (rpl_ ## func ## l, #func " is unportable - " \
+ "use gnulib module " #func " for portability")
+#define _GL_WARN_REAL_FLOATING_IMPL(func, value) \
+ (sizeof (value) == sizeof (float) ? rpl_ ## func ## f (value) \
+ : sizeof (value) == sizeof (double) ? rpl_ ## func ## d (value) \
+ : rpl_ ## func ## l (value))
/* POSIX allows platforms that don't support NAN. But all major
# define HUGE_VAL (1.0 / 0.0)
#endif
+
/* Write x as
x = mantissa * 2^exp
where
Store exp in *EXPPTR and return mantissa. */
#if @GNULIB_FREXP@
# if @REPLACE_FREXP@
-# define frexp rpl_frexp
-extern double frexp (double x, int *expptr);
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# define frexp rpl_frexp
+# endif
+_GL_FUNCDECL_RPL (frexp, double, (double x, int *expptr) _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (frexp, double, (double x, int *expptr));
+# else
+_GL_CXXALIAS_SYS (frexp, double, (double x, int *expptr));
# endif
+_GL_CXXALIASWARN (frexp);
#elif defined GNULIB_POSIXCHECK
# undef frexp
-# define frexp(x,e) \
- (GL_LINK_WARNING ("frexp is unportable - " \
- "use gnulib module frexp for portability"), \
- frexp (x, e))
+/* Assume frexp is always declared. */
+_GL_WARN_ON_USE (frexp, "frexp is unportable - "
+ "use gnulib module frexp for portability");
#endif
-#if @GNULIB_MATHL@ || !@HAVE_DECL_ACOSL@
-extern long double acosl (long double x);
+#if @GNULIB_LOGB@
+# if !@HAVE_DECL_LOGB@
+_GL_EXTERN_C double logb (double x);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef logb
+# if HAVE_RAW_DECL_LOGB
+_GL_WARN_ON_USE (logb, "logb is unportable - "
+ "use gnulib module logb for portability");
+# endif
#endif
-#if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
+
+
+#if @GNULIB_ACOSL@
+# if !@HAVE_ACOSL@ || !@HAVE_DECL_ACOSL@
+_GL_FUNCDECL_SYS (acosl, long double, (long double x));
+# endif
+_GL_CXXALIAS_SYS (acosl, long double, (long double x));
+_GL_CXXALIASWARN (acosl);
+#elif defined GNULIB_POSIXCHECK
# undef acosl
-# define acosl(x) \
- (GL_LINK_WARNING ("acosl is unportable - " \
- "use gnulib module mathl for portability"), \
- acosl (x))
+# if HAVE_RAW_DECL_ACOSL
+_GL_WARN_ON_USE (acosl, "acosl is unportable - "
+ "use gnulib module mathl for portability");
+# endif
#endif
-#if @GNULIB_MATHL@ || !@HAVE_DECL_ASINL@
-extern long double asinl (long double x);
-#endif
-#if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
+#if @GNULIB_ASINL@
+# if !@HAVE_ASINL@ || !@HAVE_DECL_ASINL@
+_GL_FUNCDECL_SYS (asinl, long double, (long double x));
+# endif
+_GL_CXXALIAS_SYS (asinl, long double, (long double x));
+_GL_CXXALIASWARN (asinl);
+#elif defined GNULIB_POSIXCHECK
# undef asinl
-# define asinl(x) \
- (GL_LINK_WARNING ("asinl is unportable - " \
- "use gnulib module mathl for portability"), \
- asinl (x))
+# if HAVE_RAW_DECL_ASINL
+_GL_WARN_ON_USE (asinl, "asinl is unportable - "
+ "use gnulib module mathl for portability");
+# endif
#endif
-#if @GNULIB_MATHL@ || !@HAVE_DECL_ATANL@
-extern long double atanl (long double x);
-#endif
-#if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
+#if @GNULIB_ATANL@
+# if !@HAVE_ATANL@ || !@HAVE_DECL_ATANL@
+_GL_FUNCDECL_SYS (atanl, long double, (long double x));
+# endif
+_GL_CXXALIAS_SYS (atanl, long double, (long double x));
+_GL_CXXALIASWARN (atanl);
+#elif defined GNULIB_POSIXCHECK
# undef atanl
-# define atanl(x) \
- (GL_LINK_WARNING ("atanl is unportable - " \
- "use gnulib module mathl for portability"), \
- atanl (x))
+# if HAVE_RAW_DECL_ATANL
+_GL_WARN_ON_USE (atanl, "atanl is unportable - "
+ "use gnulib module mathl for portability");
+# endif
#endif
#if @GNULIB_CEILF@
# if @REPLACE_CEILF@
-# define ceilf rpl_ceilf
-extern float ceilf (float x);
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# define ceilf rpl_ceilf
+# endif
+_GL_FUNCDECL_RPL (ceilf, float, (float x));
+_GL_CXXALIAS_RPL (ceilf, float, (float x));
+# else
+# if !@HAVE_DECL_CEILF@
+_GL_FUNCDECL_SYS (ceilf, float, (float x));
+# endif
+_GL_CXXALIAS_SYS (ceilf, float, (float x));
# endif
+_GL_CXXALIASWARN (ceilf);
#elif defined GNULIB_POSIXCHECK
# undef ceilf
-# define ceilf(x) \
- (GL_LINK_WARNING ("ceilf is unportable - " \
- "use gnulib module ceilf for portability"), \
- ceilf (x))
+# if HAVE_RAW_DECL_CEILF
+_GL_WARN_ON_USE (ceilf, "ceilf is unportable - "
+ "use gnulib module ceilf for portability");
+# endif
#endif
#if @GNULIB_CEILL@
# if @REPLACE_CEILL@
-# define ceill rpl_ceill
-extern long double ceill (long double x);
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# define ceill rpl_ceill
+# endif
+_GL_FUNCDECL_RPL (ceill, long double, (long double x));
+_GL_CXXALIAS_RPL (ceill, long double, (long double x));
+# else
+# if !@HAVE_DECL_CEILL@
+_GL_FUNCDECL_SYS (ceill, long double, (long double x));
+# endif
+_GL_CXXALIAS_SYS (ceill, long double, (long double x));
# endif
+_GL_CXXALIASWARN (ceill);
#elif defined GNULIB_POSIXCHECK
# undef ceill
-# define ceill(x) \
- (GL_LINK_WARNING ("ceill is unportable - " \
- "use gnulib module ceill for portability"), \
- ceill (x))
+# if HAVE_RAW_DECL_CEILL
+_GL_WARN_ON_USE (ceill, "ceill is unportable - "
+ "use gnulib module ceill for portability");
+# endif
#endif
-#if @GNULIB_MATHL@ || !@HAVE_DECL_COSL@
-extern long double cosl (long double x);
-#endif
-#if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
+#if @GNULIB_COSL@
+# if !@HAVE_COSL@ || !@HAVE_DECL_COSL@
+_GL_FUNCDECL_SYS (cosl, long double, (long double x));
+# endif
+_GL_CXXALIAS_SYS (cosl, long double, (long double x));
+_GL_CXXALIASWARN (cosl);
+#elif defined GNULIB_POSIXCHECK
# undef cosl
-# define cosl(x) \
- (GL_LINK_WARNING ("cosl is unportable - " \
- "use gnulib module mathl for portability"), \
- cosl (x))
+# if HAVE_RAW_DECL_COSL
+_GL_WARN_ON_USE (cosl, "cosl is unportable - "
+ "use gnulib module mathl for portability");
+# endif
#endif
-#if @GNULIB_MATHL@ || !@HAVE_DECL_EXPL@
-extern long double expl (long double x);
-#endif
-#if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
+#if @GNULIB_EXPL@
+# if !@HAVE_EXPL@ || !@HAVE_DECL_EXPL@
+_GL_FUNCDECL_SYS (expl, long double, (long double x));
+# endif
+_GL_CXXALIAS_SYS (expl, long double, (long double x));
+_GL_CXXALIASWARN (expl);
+#elif defined GNULIB_POSIXCHECK
# undef expl
-# define expl(x) \
- (GL_LINK_WARNING ("expl is unportable - " \
- "use gnulib module mathl for portability"), \
- expl (x))
+# if HAVE_RAW_DECL_EXPL
+_GL_WARN_ON_USE (expl, "expl is unportable - "
+ "use gnulib module mathl for portability");
+# endif
#endif
#if @GNULIB_FLOORF@
# if @REPLACE_FLOORF@
-# define floorf rpl_floorf
-extern float floorf (float x);
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# define floorf rpl_floorf
+# endif
+_GL_FUNCDECL_RPL (floorf, float, (float x));
+_GL_CXXALIAS_RPL (floorf, float, (float x));
+#else
+# if !@HAVE_DECL_FLOORF@
+_GL_FUNCDECL_SYS (floorf, float, (float x));
+# endif
+_GL_CXXALIAS_SYS (floorf, float, (float x));
# endif
+_GL_CXXALIASWARN (floorf);
#elif defined GNULIB_POSIXCHECK
# undef floorf
-# define floorf(x) \
- (GL_LINK_WARNING ("floorf is unportable - " \
- "use gnulib module floorf for portability"), \
- floorf (x))
+# if HAVE_RAW_DECL_FLOORF
+_GL_WARN_ON_USE (floorf, "floorf is unportable - "
+ "use gnulib module floorf for portability");
+# endif
#endif
#if @GNULIB_FLOORL@
# if @REPLACE_FLOORL@
-# define floorl rpl_floorl
-extern long double floorl (long double x);
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# define floorl rpl_floorl
+# endif
+_GL_FUNCDECL_RPL (floorl, long double, (long double x));
+_GL_CXXALIAS_RPL (floorl, long double, (long double x));
+# else
+# if !@HAVE_DECL_FLOORL@
+_GL_FUNCDECL_SYS (floorl, long double, (long double x));
+# endif
+_GL_CXXALIAS_SYS (floorl, long double, (long double x));
# endif
+_GL_CXXALIASWARN (floorl);
#elif defined GNULIB_POSIXCHECK
# undef floorl
-# define floorl(x) \
- (GL_LINK_WARNING ("floorl is unportable - " \
- "use gnulib module floorl for portability"), \
- floorl (x))
+# if HAVE_RAW_DECL_FLOORL
+_GL_WARN_ON_USE (floorl, "floorl is unportable - "
+ "use gnulib module floorl for portability");
+# endif
#endif
If x is infinite or NaN: mantissa = x, exp unspecified.
Store exp in *EXPPTR and return mantissa. */
#if @GNULIB_FREXPL@ && @REPLACE_FREXPL@
-# define frexpl rpl_frexpl
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# define frexpl rpl_frexpl
+# endif
+_GL_FUNCDECL_RPL (frexpl, long double,
+ (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (frexpl, long double, (long double x, int *expptr));
+#else
+# if !@HAVE_DECL_FREXPL@
+_GL_FUNCDECL_SYS (frexpl, long double,
+ (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
+# endif
+# if @GNULIB_FREXPL@
+_GL_CXXALIAS_SYS (frexpl, long double, (long double x, int *expptr));
+# endif
#endif
-#if (@GNULIB_FREXPL@ && @REPLACE_FREXPL@) || !@HAVE_DECL_FREXPL@
-extern long double frexpl (long double x, int *expptr);
+#if @GNULIB_FREXPL@ && !(@REPLACE_FREXPL@ && !@HAVE_DECL_FREXPL@)
+_GL_CXXALIASWARN (frexpl);
#endif
#if !@GNULIB_FREXPL@ && defined GNULIB_POSIXCHECK
# undef frexpl
-# define frexpl(x,e) \
- (GL_LINK_WARNING ("frexpl is unportable - " \
- "use gnulib module frexpl for portability"), \
- frexpl (x, e))
+# if HAVE_RAW_DECL_FREXPL
+_GL_WARN_ON_USE (frexpl, "frexpl is unportable - "
+ "use gnulib module frexpl for portability");
+# endif
#endif
/* Return x * 2^exp. */
#if @GNULIB_LDEXPL@ && @REPLACE_LDEXPL@
-# define ldexpl rpl_ldexpl
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# define ldexpl rpl_ldexpl
+# endif
+_GL_FUNCDECL_RPL (ldexpl, long double, (long double x, int exp));
+_GL_CXXALIAS_RPL (ldexpl, long double, (long double x, int exp));
+#else
+# if !@HAVE_DECL_LDEXPL@
+_GL_FUNCDECL_SYS (ldexpl, long double, (long double x, int exp));
+# endif
+# if @GNULIB_LDEXPL@
+_GL_CXXALIAS_SYS (ldexpl, long double, (long double x, int exp));
+# endif
#endif
-#if (@GNULIB_LDEXPL@ && @REPLACE_LDEXPL@) || !@HAVE_DECL_LDEXPL@
-extern long double ldexpl (long double x, int exp);
+#if @GNULIB_LDEXPL@
+_GL_CXXALIASWARN (ldexpl);
#endif
#if !@GNULIB_LDEXPL@ && defined GNULIB_POSIXCHECK
# undef ldexpl
-# define ldexpl(x,e) \
- (GL_LINK_WARNING ("ldexpl is unportable - " \
- "use gnulib module ldexpl for portability"), \
- ldexpl (x, e))
+# if HAVE_RAW_DECL_LDEXPL
+_GL_WARN_ON_USE (ldexpl, "ldexpl is unportable - "
+ "use gnulib module ldexpl for portability");
+# endif
#endif
-#if @GNULIB_MATHL@ || !@HAVE_DECL_LOGL@
-extern long double logl (long double x);
-#endif
-#if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
+#if @GNULIB_LOGL@
+# if !@HAVE_LOGL@ || !@HAVE_DECL_LOGL@
+_GL_FUNCDECL_SYS (logl, long double, (long double x));
+# endif
+_GL_CXXALIAS_SYS (logl, long double, (long double x));
+_GL_CXXALIASWARN (logl);
+#elif defined GNULIB_POSIXCHECK
# undef logl
-# define logl(x) \
- (GL_LINK_WARNING ("logl is unportable - " \
- "use gnulib module mathl for portability"), \
- logl (x))
+# if HAVE_RAW_DECL_LOGL
+_GL_WARN_ON_USE (logl, "logl is unportable - "
+ "use gnulib module mathl for portability");
+# endif
#endif
#if @GNULIB_ROUNDF@
# if @REPLACE_ROUNDF@
-# undef roundf
-# define roundf rpl_roundf
-extern float roundf (float x);
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef roundf
+# define roundf rpl_roundf
+# endif
+_GL_FUNCDECL_RPL (roundf, float, (float x));
+_GL_CXXALIAS_RPL (roundf, float, (float x));
+# else
+# if !@HAVE_DECL_ROUNDF@
+_GL_FUNCDECL_SYS (roundf, float, (float x));
+# endif
+_GL_CXXALIAS_SYS (roundf, float, (float x));
# endif
+_GL_CXXALIASWARN (roundf);
#elif defined GNULIB_POSIXCHECK
# undef roundf
-# define roundf(x) \
- (GL_LINK_WARNING ("roundf is unportable - " \
- "use gnulib module roundf for portability"), \
- roundf (x))
+# if HAVE_RAW_DECL_ROUNDF
+_GL_WARN_ON_USE (roundf, "roundf is unportable - "
+ "use gnulib module roundf for portability");
+# endif
#endif
#if @GNULIB_ROUND@
# if @REPLACE_ROUND@
-# undef round
-# define round rpl_round
-extern double round (double x);
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef round
+# define round rpl_round
+# endif
+_GL_FUNCDECL_RPL (round, double, (double x));
+_GL_CXXALIAS_RPL (round, double, (double x));
+# else
+# if !@HAVE_DECL_ROUND@
+_GL_FUNCDECL_SYS (round, double, (double x));
+# endif
+_GL_CXXALIAS_SYS (round, double, (double x));
# endif
+_GL_CXXALIASWARN (round);
#elif defined GNULIB_POSIXCHECK
# undef round
-# define round(x) \
- (GL_LINK_WARNING ("round is unportable - " \
- "use gnulib module round for portability"), \
- round (x))
+# if HAVE_RAW_DECL_ROUND
+_GL_WARN_ON_USE (round, "round is unportable - "
+ "use gnulib module round for portability");
+# endif
#endif
#if @GNULIB_ROUNDL@
# if @REPLACE_ROUNDL@
-# undef roundl
-# define roundl rpl_roundl
-extern long double roundl (long double x);
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef roundl
+# define roundl rpl_roundl
+# endif
+_GL_FUNCDECL_RPL (roundl, long double, (long double x));
+_GL_CXXALIAS_RPL (roundl, long double, (long double x));
+# else
+# if !@HAVE_DECL_ROUNDL@
+_GL_FUNCDECL_SYS (roundl, long double, (long double x));
+# endif
+_GL_CXXALIAS_SYS (roundl, long double, (long double x));
# endif
+_GL_CXXALIASWARN (roundl);
#elif defined GNULIB_POSIXCHECK
# undef roundl
-# define roundl(x) \
- (GL_LINK_WARNING ("roundl is unportable - " \
- "use gnulib module roundl for portability"), \
- roundl (x))
+# if HAVE_RAW_DECL_ROUNDL
+_GL_WARN_ON_USE (roundl, "roundl is unportable - "
+ "use gnulib module roundl for portability");
+# endif
#endif
-#if @GNULIB_MATHL@ || !@HAVE_DECL_SINL@
-extern long double sinl (long double x);
-#endif
-#if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
+#if @GNULIB_SINL@
+# if !@HAVE_SINL@ || !@HAVE_DECL_SINL@
+_GL_FUNCDECL_SYS (sinl, long double, (long double x));
+# endif
+_GL_CXXALIAS_SYS (sinl, long double, (long double x));
+_GL_CXXALIASWARN (sinl);
+#elif defined GNULIB_POSIXCHECK
# undef sinl
-# define sinl(x) \
- (GL_LINK_WARNING ("sinl is unportable - " \
- "use gnulib module mathl for portability"), \
- sinl (x))
+# if HAVE_RAW_DECL_SINL
+_GL_WARN_ON_USE (sinl, "sinl is unportable - "
+ "use gnulib module mathl for portability");
+# endif
#endif
-#if @GNULIB_MATHL@ || !@HAVE_DECL_SQRTL@
-extern long double sqrtl (long double x);
-#endif
-#if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
+#if @GNULIB_SQRTL@
+# if !@HAVE_SQRTL@ || !@HAVE_DECL_SQRTL@
+_GL_FUNCDECL_SYS (sqrtl, long double, (long double x));
+# endif
+_GL_CXXALIAS_SYS (sqrtl, long double, (long double x));
+_GL_CXXALIASWARN (sqrtl);
+#elif defined GNULIB_POSIXCHECK
# undef sqrtl
-# define sqrtl(x) \
- (GL_LINK_WARNING ("sqrtl is unportable - " \
- "use gnulib module mathl for portability"), \
- sqrtl (x))
+# if HAVE_RAW_DECL_SQRTL
+_GL_WARN_ON_USE (sqrtl, "sqrtl is unportable - "
+ "use gnulib module mathl for portability");
+# endif
#endif
-#if @GNULIB_MATHL@ || !@HAVE_DECL_TANL@
-extern long double tanl (long double x);
-#endif
-#if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
+#if @GNULIB_TANL@
+# if !@HAVE_TANL@ || !@HAVE_DECL_TANL@
+_GL_FUNCDECL_SYS (tanl, long double, (long double x));
+# endif
+_GL_CXXALIAS_SYS (tanl, long double, (long double x));
+_GL_CXXALIASWARN (tanl);
+#elif defined GNULIB_POSIXCHECK
# undef tanl
-# define tanl(x) \
- (GL_LINK_WARNING ("tanl is unportable - " \
- "use gnulib module mathl for portability"), \
- tanl (x))
+# if HAVE_RAW_DECL_TANL
+_GL_WARN_ON_USE (tanl, "tanl is unportable - "
+ "use gnulib module mathl for portability");
+# endif
#endif
#if @GNULIB_TRUNCF@
# if !@HAVE_DECL_TRUNCF@
-# define truncf rpl_truncf
-extern float truncf (float x);
+_GL_FUNCDECL_SYS (truncf, float, (float x));
# endif
+_GL_CXXALIAS_SYS (truncf, float, (float x));
+_GL_CXXALIASWARN (truncf);
#elif defined GNULIB_POSIXCHECK
# undef truncf
-# define truncf(x) \
- (GL_LINK_WARNING ("truncf is unportable - " \
- "use gnulib module truncf for portability"), \
- truncf (x))
+# if HAVE_RAW_DECL_TRUNCF
+_GL_WARN_ON_USE (truncf, "truncf is unportable - "
+ "use gnulib module truncf for portability");
+# endif
#endif
#if @GNULIB_TRUNC@
# if !@HAVE_DECL_TRUNC@
-# define trunc rpl_trunc
-extern double trunc (double x);
+_GL_FUNCDECL_SYS (trunc, double, (double x));
# endif
+_GL_CXXALIAS_SYS (trunc, double, (double x));
+_GL_CXXALIASWARN (trunc);
#elif defined GNULIB_POSIXCHECK
# undef trunc
-# define trunc(x) \
- (GL_LINK_WARNING ("trunc is unportable - " \
- "use gnulib module trunc for portability"), \
- trunc (x))
+# if HAVE_RAW_DECL_TRUNC
+_GL_WARN_ON_USE (trunc, "trunc is unportable - "
+ "use gnulib module trunc for portability");
+# endif
#endif
#if @GNULIB_TRUNCL@
# if @REPLACE_TRUNCL@
-# undef truncl
-# define truncl rpl_truncl
-extern long double truncl (long double x);
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef truncl
+# define truncl rpl_truncl
+# endif
+_GL_FUNCDECL_RPL (truncl, long double, (long double x));
+_GL_CXXALIAS_RPL (truncl, long double, (long double x));
+# else
+# if !@HAVE_DECL_TRUNCL@
+_GL_FUNCDECL_SYS (truncl, long double, (long double x));
+# endif
+_GL_CXXALIAS_SYS (truncl, long double, (long double x));
# endif
+_GL_CXXALIASWARN (truncl);
#elif defined GNULIB_POSIXCHECK
# undef truncl
-# define truncl(x) \
- (GL_LINK_WARNING ("truncl is unportable - " \
- "use gnulib module truncl for portability"), \
- truncl (x))
+# if HAVE_RAW_DECL_TRUNCL
+_GL_WARN_ON_USE (truncl, "truncl is unportable - "
+ "use gnulib module truncl for portability");
+# endif
#endif
#if @GNULIB_ISFINITE@
# if @REPLACE_ISFINITE@
-extern int gl_isfinitef (float x);
-extern int gl_isfinited (double x);
-extern int gl_isfinitel (long double x);
+_GL_EXTERN_C int gl_isfinitef (float x);
+_GL_EXTERN_C int gl_isfinited (double x);
+_GL_EXTERN_C int gl_isfinitel (long double x);
# undef isfinite
# define isfinite(x) \
(sizeof (x) == sizeof (long double) ? gl_isfinitel (x) : \
gl_isfinitef (x))
# endif
#elif defined GNULIB_POSIXCHECK
- /* How to override a macro? */
+# if defined isfinite
+_GL_WARN_REAL_FLOATING_DECL (isfinite);
+# undef isfinite
+# define isfinite(x) _GL_WARN_REAL_FLOATING_IMPL (isfinite, x)
+# endif
#endif
#if @GNULIB_ISINF@
# if @REPLACE_ISINF@
-extern int gl_isinff (float x);
-extern int gl_isinfd (double x);
-extern int gl_isinfl (long double x);
+_GL_EXTERN_C int gl_isinff (float x);
+_GL_EXTERN_C int gl_isinfd (double x);
+_GL_EXTERN_C int gl_isinfl (long double x);
# undef isinf
# define isinf(x) \
(sizeof (x) == sizeof (long double) ? gl_isinfl (x) : \
gl_isinff (x))
# endif
#elif defined GNULIB_POSIXCHECK
- /* How to override a macro? */
+# if defined isinf
+_GL_WARN_REAL_FLOATING_DECL (isinf);
+# undef isinf
+# define isinf(x) _GL_WARN_REAL_FLOATING_IMPL (isinf, x)
+# endif
+#endif
+
+
+#if @GNULIB_ISNANF@
+/* Test for NaN for 'float' numbers. */
+# if @HAVE_ISNANF@
+/* The original <math.h> included above provides a declaration of isnan macro
+ or (older) isnanf function. */
+# if __GNUC__ >= 4
+ /* GCC 4.0 and newer provides three built-ins for isnan. */
+# undef isnanf
+# define isnanf(x) __builtin_isnanf ((float)(x))
+# elif defined isnan
+# undef isnanf
+# define isnanf(x) isnan ((float)(x))
+# endif
+# else
+/* Test whether X is a NaN. */
+# undef isnanf
+# define isnanf rpl_isnanf
+_GL_EXTERN_C int isnanf (float x);
+# endif
+#endif
+
+#if @GNULIB_ISNAND@
+/* Test for NaN for 'double' numbers.
+ This function is a gnulib extension, unlike isnan() which applied only
+ to 'double' numbers earlier but now is a type-generic macro. */
+# if @HAVE_ISNAND@
+/* The original <math.h> included above provides a declaration of isnan macro. */
+# if __GNUC__ >= 4
+ /* GCC 4.0 and newer provides three built-ins for isnan. */
+# undef isnand
+# define isnand(x) __builtin_isnan ((double)(x))
+# else
+# undef isnand
+# define isnand(x) isnan ((double)(x))
+# endif
+# else
+/* Test whether X is a NaN. */
+# undef isnand
+# define isnand rpl_isnand
+_GL_EXTERN_C int isnand (double x);
+# endif
#endif
+#if @GNULIB_ISNANL@
+/* Test for NaN for 'long double' numbers. */
+# if @HAVE_ISNANL@
+/* The original <math.h> included above provides a declaration of isnan macro or (older) isnanl function. */
+# if __GNUC__ >= 4
+ /* GCC 4.0 and newer provides three built-ins for isnan. */
+# undef isnanl
+# define isnanl(x) __builtin_isnanl ((long double)(x))
+# elif defined isnan
+# undef isnanl
+# define isnanl(x) isnan ((long double)(x))
+# endif
+# else
+/* Test whether X is a NaN. */
+# undef isnanl
+# define isnanl rpl_isnanl
+_GL_EXTERN_C int isnanl (long double x);
+# endif
+#endif
+/* This must come *after* the snippets for GNULIB_ISNANF and GNULIB_ISNANL! */
#if @GNULIB_ISNAN@
# if @REPLACE_ISNAN@
/* We can't just use the isnanf macro (e.g.) as exposed by
isnanf.h (e.g.) here, because those may end up being macros
that recursively expand back to isnan. So use the gnulib
replacements for them directly. */
-# if HAVE_ISNANF && __GNUC__ >= 4
+# if @HAVE_ISNANF@ && __GNUC__ >= 4
# define gl_isnan_f(x) __builtin_isnan ((float)(x))
# else
-extern int rpl_isnanf (float x);
+_GL_EXTERN_C int rpl_isnanf (float x);
# define gl_isnan_f(x) rpl_isnanf (x)
# endif
-# if HAVE_ISNAND && __GNUC__ >= 4
+# if @HAVE_ISNAND@ && __GNUC__ >= 4
# define gl_isnan_d(x) __builtin_isnan ((double)(x))
# else
-extern int rpl_isnand (double x);
+_GL_EXTERN_C int rpl_isnand (double x);
# define gl_isnan_d(x) rpl_isnand (x)
# endif
-# if HAVE_ISNANL && __GNUC__ >= 4
+# if @HAVE_ISNANL@ && __GNUC__ >= 4
# define gl_isnan_l(x) __builtin_isnan ((long double)(x))
# else
-extern int rpl_isnanl (long double x);
+_GL_EXTERN_C int rpl_isnanl (long double x);
# define gl_isnan_l(x) rpl_isnanl (x)
# endif
# undef isnan
gl_isnan_f (x))
# endif
#elif defined GNULIB_POSIXCHECK
- /* How to override a macro? */
+# if defined isnan
+_GL_WARN_REAL_FLOATING_DECL (isnan);
+# undef isnan
+# define isnan(x) _GL_WARN_REAL_FLOATING_IMPL (isnan, x)
+# endif
#endif
# endif
# if @REPLACE_SIGNBIT@
# undef signbit
-extern int gl_signbitf (float arg);
-extern int gl_signbitd (double arg);
-extern int gl_signbitl (long double arg);
+_GL_EXTERN_C int gl_signbitf (float arg);
+_GL_EXTERN_C int gl_signbitd (double arg);
+_GL_EXTERN_C int gl_signbitl (long double arg);
# if __GNUC__ >= 2 && !__STRICT_ANSI__
-# if defined FLT_SIGNBIT_WORD && defined FLT_SIGNBIT_BIT
+# if defined FLT_SIGNBIT_WORD && defined FLT_SIGNBIT_BIT && !defined gl_signbitf
+# define gl_signbitf_OPTIMIZED_MACRO
# define gl_signbitf(arg) \
- ({ union { float _value; \
+ ({ union { float _value; \
unsigned int _word[(sizeof (float) + sizeof (unsigned int) - 1) / sizeof (unsigned int)]; \
- } _m; \
- _m._value = (arg); \
- (_m._word[FLT_SIGNBIT_WORD] >> FLT_SIGNBIT_BIT) & 1; \
+ } _m; \
+ _m._value = (arg); \
+ (_m._word[FLT_SIGNBIT_WORD] >> FLT_SIGNBIT_BIT) & 1; \
})
# endif
-# if defined DBL_SIGNBIT_WORD && defined DBL_SIGNBIT_BIT
+# if defined DBL_SIGNBIT_WORD && defined DBL_SIGNBIT_BIT && !defined gl_signbitd
+# define gl_signbitd_OPTIMIZED_MACRO
# define gl_signbitd(arg) \
- ({ union { double _value; \
+ ({ union { double _value; \
unsigned int _word[(sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int)]; \
- } _m; \
- _m._value = (arg); \
- (_m._word[DBL_SIGNBIT_WORD] >> DBL_SIGNBIT_BIT) & 1; \
+ } _m; \
+ _m._value = (arg); \
+ (_m._word[DBL_SIGNBIT_WORD] >> DBL_SIGNBIT_BIT) & 1; \
})
# endif
-# if defined LDBL_SIGNBIT_WORD && defined LDBL_SIGNBIT_BIT
+# if defined LDBL_SIGNBIT_WORD && defined LDBL_SIGNBIT_BIT && !defined gl_signbitl
+# define gl_signbitl_OPTIMIZED_MACRO
# define gl_signbitl(arg) \
- ({ union { long double _value; \
+ ({ union { long double _value; \
unsigned int _word[(sizeof (long double) + sizeof (unsigned int) - 1) / sizeof (unsigned int)]; \
- } _m; \
- _m._value = (arg); \
- (_m._word[LDBL_SIGNBIT_WORD] >> LDBL_SIGNBIT_BIT) & 1; \
+ } _m; \
+ _m._value = (arg); \
+ (_m._word[LDBL_SIGNBIT_WORD] >> LDBL_SIGNBIT_BIT) & 1; \
})
# endif
# endif
gl_signbitf (x))
# endif
#elif defined GNULIB_POSIXCHECK
- /* How to override a macro? */
+# if defined signbit
+_GL_WARN_REAL_FLOATING_DECL (signbit);
+# undef signbit
+# define signbit(x) _GL_WARN_REAL_FLOATING_IMPL (signbit, x)
+# endif
#endif
-#ifdef __cplusplus
-}
-#endif
-
#endif /* _GL_MATH_H */
#endif /* _GL_MATH_H */
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