/* A GNU-like <math.h>.
- Copyright (C) 2002-2003, 2007-2009 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
/* The definition of GL_LINK_WARNING is copied here. */
+/* The definition of _GL_ARG_NONNULL 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))
+
#ifdef __cplusplus
extern "C" {
#if @GNULIB_FREXP@
# if @REPLACE_FREXP@
# define frexp rpl_frexp
-extern double frexp (double x, int *expptr);
+extern double frexp (double x, int *expptr) _GL_ARG_NONNULL ((2));
# endif
#elif defined GNULIB_POSIXCHECK
# undef frexp
#endif
-#if @GNULIB_MATHL@ || !@HAVE_DECL_ACOSL@
+#if @GNULIB_ACOSL@
+# if !@HAVE_ACOSL@ || !@HAVE_DECL_ACOSL@
extern long double acosl (long double x);
-#endif
-#if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
+# endif
+#elif defined GNULIB_POSIXCHECK
# undef acosl
# define acosl(x) \
(GL_LINK_WARNING ("acosl is unportable - " \
#endif
-#if @GNULIB_MATHL@ || !@HAVE_DECL_ASINL@
+#if @GNULIB_ASINL@
+# if !@HAVE_ASINL@ || !@HAVE_DECL_ASINL@
extern long double asinl (long double x);
-#endif
-#if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
+# endif
+#elif defined GNULIB_POSIXCHECK
# undef asinl
# define asinl(x) \
(GL_LINK_WARNING ("asinl is unportable - " \
#endif
-#if @GNULIB_MATHL@ || !@HAVE_DECL_ATANL@
+#if @GNULIB_ATANL@
+# if !@HAVE_ATANL@ || !@HAVE_DECL_ATANL@
extern long double atanl (long double x);
-#endif
-#if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
+# endif
+#elif defined GNULIB_POSIXCHECK
# undef atanl
# define atanl(x) \
(GL_LINK_WARNING ("atanl is unportable - " \
#endif
-#if @GNULIB_MATHL@ || (!@HAVE_DECL_COSL@ && !defined cosl)
-# undef cosl
+#if @GNULIB_COSL@
+# if !@HAVE_COSL@
+# undef cosl
+# define cosl rpl_cosl
+# endif
+# if !@HAVE_COSL@ || !@HAVE_DECL_COSL@
extern long double cosl (long double x);
-#endif
-#if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
+# endif
+#elif defined GNULIB_POSIXCHECK
# undef cosl
# define cosl(x) \
(GL_LINK_WARNING ("cosl is unportable - " \
#endif
-#if @GNULIB_MATHL@ || !@HAVE_DECL_EXPL@
+#if @GNULIB_EXPL@
+# if !@HAVE_EXPL@ || !@HAVE_DECL_EXPL@
extern long double expl (long double x);
-#endif
-#if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
+# endif
+#elif defined GNULIB_POSIXCHECK
# undef expl
# define expl(x) \
(GL_LINK_WARNING ("expl is unportable - " \
# define frexpl rpl_frexpl
#endif
#if (@GNULIB_FREXPL@ && @REPLACE_FREXPL@) || !@HAVE_DECL_FREXPL@
-extern long double frexpl (long double x, int *expptr);
+extern long double frexpl (long double x, int *expptr) _GL_ARG_NONNULL ((2));
#endif
#if !@GNULIB_FREXPL@ && defined GNULIB_POSIXCHECK
# undef frexpl
#endif
-#if @GNULIB_MATHL@ || (!@HAVE_DECL_LOGL@ && !defined logl)
-# undef logl
+#if @GNULIB_LOGL@
+# if !@HAVE_LOGL@
+# undef logl
+# define logl rpl_logl
+# endif
+# if !@HAVE_LOGL@ || !@HAVE_DECL_LOGL@
extern long double logl (long double x);
-#endif
-#if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
+# endif
+#elif defined GNULIB_POSIXCHECK
# undef logl
# define logl(x) \
(GL_LINK_WARNING ("logl is unportable - " \
#endif
-#if @GNULIB_MATHL@ || (!@HAVE_DECL_SINL@ && !defined sinl)
-# undef sinl
+#if @GNULIB_SINL@
+# if !@HAVE_SINL@
+# undef sinl
+# define sinl rpl_sinl
+# endif
+# if !@HAVE_SINL@ || !@HAVE_DECL_SINL@
extern long double sinl (long double x);
-#endif
-#if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
+# endif
+#elif defined GNULIB_POSIXCHECK
# undef sinl
# define sinl(x) \
(GL_LINK_WARNING ("sinl is unportable - " \
#endif
-#if @GNULIB_MATHL@ || !@HAVE_DECL_SQRTL@
+#if @GNULIB_SQRTL@
+# if !@HAVE_SQRTL@ || !@HAVE_DECL_SQRTL@
extern long double sqrtl (long double x);
-#endif
-#if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
+# endif
+#elif defined GNULIB_POSIXCHECK
# undef sqrtl
# define sqrtl(x) \
(GL_LINK_WARNING ("sqrtl is unportable - " \
#endif
-#if @GNULIB_MATHL@ || !@HAVE_DECL_TANL@
+#if @GNULIB_TANL@
+# if !@HAVE_TANL@ || !@HAVE_DECL_TANL@
extern long double tanl (long double x);
-#endif
-#if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
+# endif
+#elif defined GNULIB_POSIXCHECK
# undef tanl
# define tanl(x) \
(GL_LINK_WARNING ("tanl is unportable - " \
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
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 @HAVE_ISNANF@
/* The original <math.h> included above provides a declaration of isnan macro
or (older) isnanf function. */
-# include <math.h>
# if __GNUC__ >= 4
/* GCC 4.0 and newer provides three built-ins for isnan. */
# undef isnanf
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. */
-# include <math.h>
# if __GNUC__ >= 4
/* GCC 4.0 and newer provides three built-ins for isnan. */
# undef isnand
/* 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. */
-# include <math.h>
# if __GNUC__ >= 4
/* GCC 4.0 and newer provides three built-ins for isnan. */
# undef isnanl
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
# 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 && !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 && !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
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