1 /* A GNU-like <math.h>.
3 Copyright (C) 2002-2003, 2007-2012 Free Software Foundation, Inc.
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
18 #ifndef _@GUARD_PREFIX@_MATH_H
21 @PRAGMA_SYSTEM_HEADER@
25 /* The include_next requires a split double-inclusion guard. */
26 #@INCLUDE_NEXT_AS_FIRST_DIRECTIVE@ @NEXT_AS_FIRST_DIRECTIVE_MATH_H@
28 #ifndef _@GUARD_PREFIX@_MATH_H
29 #define _@GUARD_PREFIX@_MATH_H
32 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
34 /* The definition of _GL_ARG_NONNULL is copied here. */
36 /* The definition of _GL_WARN_ON_USE is copied here. */
39 /* Helper macros to define type-generic function FUNC as overloaded functions,
40 rather than as macros like in C. POSIX declares these with an argument of
41 real-floating (that is, one of float, double, or long double). */
42 # define _GL_MATH_CXX_REAL_FLOATING_DECL_1(func) \
44 _gl_cxx_ ## func ## f (float f) \
49 _gl_cxx_ ## func ## d (double d) \
54 _gl_cxx_ ## func ## l (long double l) \
58 # define _GL_MATH_CXX_REAL_FLOATING_DECL_2(func) \
62 return _gl_cxx_ ## func ## f (f); \
67 return _gl_cxx_ ## func ## d (d); \
70 func (long double l) \
72 return _gl_cxx_ ## func ## l (l); \
76 /* Helper macros to define a portability warning for the
77 classification macro FUNC called with VALUE. POSIX declares the
78 classification macros with an argument of real-floating (that is,
79 one of float, double, or long double). */
80 #define _GL_WARN_REAL_FLOATING_DECL(func) \
82 rpl_ ## func ## f (float f) \
87 rpl_ ## func ## d (double d) \
92 rpl_ ## func ## l (long double l) \
96 _GL_WARN_ON_USE (rpl_ ## func ## f, #func " is unportable - " \
97 "use gnulib module " #func " for portability"); \
98 _GL_WARN_ON_USE (rpl_ ## func ## d, #func " is unportable - " \
99 "use gnulib module " #func " for portability"); \
100 _GL_WARN_ON_USE (rpl_ ## func ## l, #func " is unportable - " \
101 "use gnulib module " #func " for portability")
102 #define _GL_WARN_REAL_FLOATING_IMPL(func, value) \
103 (sizeof (value) == sizeof (float) ? rpl_ ## func ## f (value) \
104 : sizeof (value) == sizeof (double) ? rpl_ ## func ## d (value) \
105 : rpl_ ## func ## l (value))
109 /* Pull in a function that fixes the 'int' to 'long double' conversion
111 _GL_EXTERN_C void _Qp_itoq (long double *, int);
112 static void (*_gl_math_fix_itold) (long double *, int) = _Qp_itoq;
116 /* POSIX allows platforms that don't support NAN. But all major
117 machines in the past 15 years have supported something close to
118 IEEE NaN, so we define this unconditionally. We also must define
119 it on platforms like Solaris 10, where NAN is present but defined
120 as a function pointer rather than a floating point constant. */
121 #if !defined NAN || @REPLACE_NAN@
122 # if !GNULIB_defined_NAN
124 /* The Compaq (ex-DEC) C 6.4 compiler and the Microsoft MSVC 9 compiler
125 choke on the expression 0.0 / 0.0. */
126 # if defined __DECC || defined _MSC_VER
130 static float zero = 0.0f;
133 # define NAN (_NaN())
135 # define NAN (0.0f / 0.0f)
137 # define GNULIB_defined_NAN 1
141 /* Solaris 10 defines HUGE_VAL, but as a function pointer rather
142 than a floating point constant. */
143 #if @REPLACE_HUGE_VAL@
145 # define HUGE_VALF (1.0f / 0.0f)
147 # define HUGE_VAL (1.0 / 0.0)
149 # define HUGE_VALL (1.0L / 0.0L)
152 /* HUGE_VALF is a 'float' Infinity. */
154 # if defined _MSC_VER
155 /* The Microsoft MSVC 9 compiler chokes on the expression 1.0f / 0.0f. */
156 # define HUGE_VALF (1e25f * 1e25f)
158 # define HUGE_VALF (1.0f / 0.0f)
162 /* HUGE_VAL is a 'double' Infinity. */
164 # if defined _MSC_VER
165 /* The Microsoft MSVC 9 compiler chokes on the expression 1.0 / 0.0. */
166 # define HUGE_VAL (1e250 * 1e250)
168 # define HUGE_VAL (1.0 / 0.0)
172 /* HUGE_VALL is a 'long double' Infinity. */
174 # if defined _MSC_VER
175 /* The Microsoft MSVC 9 compiler chokes on the expression 1.0L / 0.0L. */
176 # define HUGE_VALL (1e250L * 1e250L)
178 # define HUGE_VALL (1.0L / 0.0L)
185 _GL_FUNCDECL_SYS (acosf, float, (float x));
187 _GL_CXXALIAS_SYS (acosf, float, (float x));
188 _GL_CXXALIASWARN (acosf);
189 #elif defined GNULIB_POSIXCHECK
191 # if HAVE_RAW_DECL_ACOSF
192 _GL_WARN_ON_USE (acosf, "acosf is unportable - "
193 "use gnulib module acosf for portability");
198 # if !@HAVE_ACOSL@ || !@HAVE_DECL_ACOSL@
200 _GL_FUNCDECL_SYS (acosl, long double, (long double x));
202 _GL_CXXALIAS_SYS (acosl, long double, (long double x));
203 _GL_CXXALIASWARN (acosl);
204 #elif defined GNULIB_POSIXCHECK
206 # if HAVE_RAW_DECL_ACOSL
207 _GL_WARN_ON_USE (acosl, "acosl is unportable - "
208 "use gnulib module mathl for portability");
216 _GL_FUNCDECL_SYS (asinf, float, (float x));
218 _GL_CXXALIAS_SYS (asinf, float, (float x));
219 _GL_CXXALIASWARN (asinf);
220 #elif defined GNULIB_POSIXCHECK
222 # if HAVE_RAW_DECL_ASINF
223 _GL_WARN_ON_USE (asinf, "asinf is unportable - "
224 "use gnulib module asinf for portability");
229 # if !@HAVE_ASINL@ || !@HAVE_DECL_ASINL@
231 _GL_FUNCDECL_SYS (asinl, long double, (long double x));
233 _GL_CXXALIAS_SYS (asinl, long double, (long double x));
234 _GL_CXXALIASWARN (asinl);
235 #elif defined GNULIB_POSIXCHECK
237 # if HAVE_RAW_DECL_ASINL
238 _GL_WARN_ON_USE (asinl, "asinl is unportable - "
239 "use gnulib module mathl for portability");
247 _GL_FUNCDECL_SYS (atanf, float, (float x));
249 _GL_CXXALIAS_SYS (atanf, float, (float x));
250 _GL_CXXALIASWARN (atanf);
251 #elif defined GNULIB_POSIXCHECK
253 # if HAVE_RAW_DECL_ATANF
254 _GL_WARN_ON_USE (atanf, "atanf is unportable - "
255 "use gnulib module atanf for portability");
260 # if !@HAVE_ATANL@ || !@HAVE_DECL_ATANL@
262 _GL_FUNCDECL_SYS (atanl, long double, (long double x));
264 _GL_CXXALIAS_SYS (atanl, long double, (long double x));
265 _GL_CXXALIASWARN (atanl);
266 #elif defined GNULIB_POSIXCHECK
268 # if HAVE_RAW_DECL_ATANL
269 _GL_WARN_ON_USE (atanl, "atanl is unportable - "
270 "use gnulib module mathl for portability");
278 _GL_FUNCDECL_SYS (atan2f, float, (float y, float x));
280 _GL_CXXALIAS_SYS (atan2f, float, (float y, float x));
281 _GL_CXXALIASWARN (atan2f);
282 #elif defined GNULIB_POSIXCHECK
284 # if HAVE_RAW_DECL_ATAN2F
285 _GL_WARN_ON_USE (atan2f, "atan2f is unportable - "
286 "use gnulib module atan2f for portability");
293 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
295 # define ceilf rpl_ceilf
297 _GL_FUNCDECL_RPL (ceilf, float, (float x));
298 _GL_CXXALIAS_RPL (ceilf, float, (float x));
300 # if !@HAVE_DECL_CEILF@
302 _GL_FUNCDECL_SYS (ceilf, float, (float x));
304 _GL_CXXALIAS_SYS (ceilf, float, (float x));
306 _GL_CXXALIASWARN (ceilf);
307 #elif defined GNULIB_POSIXCHECK
309 # if HAVE_RAW_DECL_CEILF
310 _GL_WARN_ON_USE (ceilf, "ceilf is unportable - "
311 "use gnulib module ceilf for portability");
317 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
318 # define ceil rpl_ceil
320 _GL_FUNCDECL_RPL (ceil, double, (double x));
321 _GL_CXXALIAS_RPL (ceil, double, (double x));
323 _GL_CXXALIAS_SYS (ceil, double, (double x));
325 _GL_CXXALIASWARN (ceil);
330 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
332 # define ceill rpl_ceill
334 _GL_FUNCDECL_RPL (ceill, long double, (long double x));
335 _GL_CXXALIAS_RPL (ceill, long double, (long double x));
337 # if !@HAVE_DECL_CEILL@
339 _GL_FUNCDECL_SYS (ceill, long double, (long double x));
341 _GL_CXXALIAS_SYS (ceill, long double, (long double x));
343 _GL_CXXALIASWARN (ceill);
344 #elif defined GNULIB_POSIXCHECK
346 # if HAVE_RAW_DECL_CEILL
347 _GL_WARN_ON_USE (ceill, "ceill is unportable - "
348 "use gnulib module ceill for portability");
353 #if @GNULIB_COPYSIGNF@
354 # if !@HAVE_COPYSIGNF@
355 _GL_FUNCDECL_SYS (copysignf, float, (float x, float y));
357 _GL_CXXALIAS_SYS (copysignf, float, (float x, float y));
358 _GL_CXXALIASWARN (copysignf);
359 #elif defined GNULIB_POSIXCHECK
361 # if HAVE_RAW_DECL_COPYSIGNF
362 _GL_WARN_ON_USE (copysignf, "copysignf is unportable - "
363 "use gnulib module copysignf for portability");
367 #if @GNULIB_COPYSIGN@
368 # if !@HAVE_COPYSIGN@
369 _GL_FUNCDECL_SYS (copysign, double, (double x, double y));
371 _GL_CXXALIAS_SYS (copysign, double, (double x, double y));
372 _GL_CXXALIASWARN (copysign);
373 #elif defined GNULIB_POSIXCHECK
375 # if HAVE_RAW_DECL_COPYSIGN
376 _GL_WARN_ON_USE (copysign, "copysign is unportable - "
377 "use gnulib module copysign for portability");
381 #if @GNULIB_COPYSIGNL@
382 # if !@HAVE_COPYSIGNL@
383 _GL_FUNCDECL_SYS (copysignl, long double, (long double x, long double y));
385 _GL_CXXALIAS_SYS (copysignl, long double, (long double x, long double y));
386 _GL_CXXALIASWARN (copysignl);
387 #elif defined GNULIB_POSIXCHECK
389 # if HAVE_RAW_DECL_COPYSIGNL
390 _GL_WARN_ON_USE (copysign, "copysignl is unportable - "
391 "use gnulib module copysignl for portability");
399 _GL_FUNCDECL_SYS (cosf, float, (float x));
401 _GL_CXXALIAS_SYS (cosf, float, (float x));
402 _GL_CXXALIASWARN (cosf);
403 #elif defined GNULIB_POSIXCHECK
405 # if HAVE_RAW_DECL_COSF
406 _GL_WARN_ON_USE (cosf, "cosf is unportable - "
407 "use gnulib module cosf for portability");
412 # if !@HAVE_COSL@ || !@HAVE_DECL_COSL@
414 _GL_FUNCDECL_SYS (cosl, long double, (long double x));
416 _GL_CXXALIAS_SYS (cosl, long double, (long double x));
417 _GL_CXXALIASWARN (cosl);
418 #elif defined GNULIB_POSIXCHECK
420 # if HAVE_RAW_DECL_COSL
421 _GL_WARN_ON_USE (cosl, "cosl is unportable - "
422 "use gnulib module mathl for portability");
430 _GL_FUNCDECL_SYS (coshf, float, (float x));
432 _GL_CXXALIAS_SYS (coshf, float, (float x));
433 _GL_CXXALIASWARN (coshf);
434 #elif defined GNULIB_POSIXCHECK
436 # if HAVE_RAW_DECL_COSHF
437 _GL_WARN_ON_USE (coshf, "coshf is unportable - "
438 "use gnulib module coshf for portability");
446 _GL_FUNCDECL_SYS (expf, float, (float x));
448 _GL_CXXALIAS_SYS (expf, float, (float x));
449 _GL_CXXALIASWARN (expf);
450 #elif defined GNULIB_POSIXCHECK
452 # if HAVE_RAW_DECL_EXPF
453 _GL_WARN_ON_USE (expf, "expf is unportable - "
454 "use gnulib module expf for portability");
459 # if !@HAVE_EXPL@ || !@HAVE_DECL_EXPL@
461 _GL_FUNCDECL_SYS (expl, long double, (long double x));
463 _GL_CXXALIAS_SYS (expl, long double, (long double x));
464 _GL_CXXALIASWARN (expl);
465 #elif defined GNULIB_POSIXCHECK
467 # if HAVE_RAW_DECL_EXPL
468 _GL_WARN_ON_USE (expl, "expl is unportable - "
469 "use gnulib module mathl for portability");
477 _GL_FUNCDECL_SYS (fabsf, float, (float x));
479 _GL_CXXALIAS_SYS (fabsf, float, (float x));
480 _GL_CXXALIASWARN (fabsf);
481 #elif defined GNULIB_POSIXCHECK
483 # if HAVE_RAW_DECL_FABSF
484 _GL_WARN_ON_USE (fabsf, "fabsf is unportable - "
485 "use gnulib module fabsf for portability");
491 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
493 # define fabsl rpl_fabsl
495 _GL_FUNCDECL_RPL (fabsl, long double, (long double x));
496 _GL_CXXALIAS_RPL (fabsl, long double, (long double x));
500 _GL_FUNCDECL_SYS (fabsl, long double, (long double x));
502 _GL_CXXALIAS_SYS (fabsl, long double, (long double x));
504 _GL_CXXALIASWARN (fabsl);
505 #elif defined GNULIB_POSIXCHECK
507 # if HAVE_RAW_DECL_FABSL
508 _GL_WARN_ON_USE (fabsl, "fabsl is unportable - "
509 "use gnulib module fabsl for portability");
515 # if @REPLACE_FLOORF@
516 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
518 # define floorf rpl_floorf
520 _GL_FUNCDECL_RPL (floorf, float, (float x));
521 _GL_CXXALIAS_RPL (floorf, float, (float x));
523 # if !@HAVE_DECL_FLOORF@
525 _GL_FUNCDECL_SYS (floorf, float, (float x));
527 _GL_CXXALIAS_SYS (floorf, float, (float x));
529 _GL_CXXALIASWARN (floorf);
530 #elif defined GNULIB_POSIXCHECK
532 # if HAVE_RAW_DECL_FLOORF
533 _GL_WARN_ON_USE (floorf, "floorf is unportable - "
534 "use gnulib module floorf for portability");
540 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
541 # define floor rpl_floor
543 _GL_FUNCDECL_RPL (floor, double, (double x));
544 _GL_CXXALIAS_RPL (floor, double, (double x));
546 _GL_CXXALIAS_SYS (floor, double, (double x));
548 _GL_CXXALIASWARN (floor);
552 # if @REPLACE_FLOORL@
553 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
555 # define floorl rpl_floorl
557 _GL_FUNCDECL_RPL (floorl, long double, (long double x));
558 _GL_CXXALIAS_RPL (floorl, long double, (long double x));
560 # if !@HAVE_DECL_FLOORL@
562 _GL_FUNCDECL_SYS (floorl, long double, (long double x));
564 _GL_CXXALIAS_SYS (floorl, long double, (long double x));
566 _GL_CXXALIASWARN (floorl);
567 #elif defined GNULIB_POSIXCHECK
569 # if HAVE_RAW_DECL_FLOORL
570 _GL_WARN_ON_USE (floorl, "floorl is unportable - "
571 "use gnulib module floorl for portability");
578 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
580 # define fmaf rpl_fmaf
582 _GL_FUNCDECL_RPL (fmaf, float, (float x, float y, float z));
583 _GL_CXXALIAS_RPL (fmaf, float, (float x, float y, float z));
586 _GL_FUNCDECL_SYS (fmaf, float, (float x, float y, float z));
588 _GL_CXXALIAS_SYS (fmaf, float, (float x, float y, float z));
590 _GL_CXXALIASWARN (fmaf);
591 #elif defined GNULIB_POSIXCHECK
593 # if HAVE_RAW_DECL_FMAF
594 _GL_WARN_ON_USE (fmaf, "fmaf is unportable - "
595 "use gnulib module fmaf for portability");
601 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
605 _GL_FUNCDECL_RPL (fma, double, (double x, double y, double z));
606 _GL_CXXALIAS_RPL (fma, double, (double x, double y, double z));
609 _GL_FUNCDECL_SYS (fma, double, (double x, double y, double z));
611 _GL_CXXALIAS_SYS (fma, double, (double x, double y, double z));
613 _GL_CXXALIASWARN (fma);
614 #elif defined GNULIB_POSIXCHECK
616 # if HAVE_RAW_DECL_FMA
617 _GL_WARN_ON_USE (fma, "fma is unportable - "
618 "use gnulib module fma for portability");
624 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
626 # define fmal rpl_fmal
628 _GL_FUNCDECL_RPL (fmal, long double,
629 (long double x, long double y, long double z));
630 _GL_CXXALIAS_RPL (fmal, long double,
631 (long double x, long double y, long double z));
634 _GL_FUNCDECL_SYS (fmal, long double,
635 (long double x, long double y, long double z));
637 _GL_CXXALIAS_SYS (fmal, long double,
638 (long double x, long double y, long double z));
640 _GL_CXXALIASWARN (fmal);
641 #elif defined GNULIB_POSIXCHECK
643 # if HAVE_RAW_DECL_FMAL
644 _GL_WARN_ON_USE (fmal, "fmal is unportable - "
645 "use gnulib module fmal for portability");
652 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
654 # define fmodf rpl_fmodf
656 _GL_FUNCDECL_RPL (fmodf, float, (float x, float y));
657 _GL_CXXALIAS_RPL (fmodf, float, (float x, float y));
661 _GL_FUNCDECL_SYS (fmodf, float, (float x, float y));
663 _GL_CXXALIAS_SYS (fmodf, float, (float x, float y));
665 _GL_CXXALIASWARN (fmodf);
666 #elif defined GNULIB_POSIXCHECK
668 # if HAVE_RAW_DECL_FMODF
669 _GL_WARN_ON_USE (fmodf, "fmodf is unportable - "
670 "use gnulib module fmodf for portability");
676 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
678 # define fmod rpl_fmod
680 _GL_FUNCDECL_RPL (fmod, double, (double x, double y));
681 _GL_CXXALIAS_RPL (fmod, double, (double x, double y));
683 _GL_CXXALIAS_SYS (fmod, double, (double x, double y));
685 _GL_CXXALIASWARN (fmod);
686 #elif defined GNULIB_POSIXCHECK
688 # if HAVE_RAW_DECL_FMOD
689 _GL_WARN_ON_USE (fmod, "fmod has portability problems - "
690 "use gnulib module fmod for portability");
696 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
698 # define fmodl rpl_fmodl
700 _GL_FUNCDECL_RPL (fmodl, long double, (long double x, long double y));
701 _GL_CXXALIAS_RPL (fmodl, long double, (long double x, long double y));
705 _GL_FUNCDECL_SYS (fmodl, long double, (long double x, long double y));
707 _GL_CXXALIAS_SYS (fmodl, long double, (long double x, long double y));
709 _GL_CXXALIASWARN (fmodl);
710 #elif defined GNULIB_POSIXCHECK
712 # if HAVE_RAW_DECL_FMODL
713 _GL_WARN_ON_USE (fmodl, "fmodl is unportable - "
714 "use gnulib module fmodl for portability");
722 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
723 If x is zero: mantissa = x, exp = 0.
724 If x is infinite or NaN: mantissa = x, exp unspecified.
725 Store exp in *EXPPTR and return mantissa. */
727 # if @REPLACE_FREXPF@
728 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
730 # define frexpf rpl_frexpf
732 _GL_FUNCDECL_RPL (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
733 _GL_CXXALIAS_RPL (frexpf, float, (float x, int *expptr));
737 _GL_FUNCDECL_SYS (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
739 _GL_CXXALIAS_SYS (frexpf, float, (float x, int *expptr));
741 _GL_CXXALIASWARN (frexpf);
742 #elif defined GNULIB_POSIXCHECK
744 # if HAVE_RAW_DECL_FREXPF
745 _GL_WARN_ON_USE (frexpf, "frexpf is unportable - "
746 "use gnulib module frexpf for portability");
753 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
754 If x is zero: mantissa = x, exp = 0.
755 If x is infinite or NaN: mantissa = x, exp unspecified.
756 Store exp in *EXPPTR and return mantissa. */
759 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
760 # define frexp rpl_frexp
762 _GL_FUNCDECL_RPL (frexp, double, (double x, int *expptr) _GL_ARG_NONNULL ((2)));
763 _GL_CXXALIAS_RPL (frexp, double, (double x, int *expptr));
765 _GL_CXXALIAS_SYS (frexp, double, (double x, int *expptr));
767 _GL_CXXALIASWARN (frexp);
768 #elif defined GNULIB_POSIXCHECK
770 /* Assume frexp is always declared. */
771 _GL_WARN_ON_USE (frexp, "frexp is unportable - "
772 "use gnulib module frexp for portability");
778 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
779 If x is zero: mantissa = x, exp = 0.
780 If x is infinite or NaN: mantissa = x, exp unspecified.
781 Store exp in *EXPPTR and return mantissa. */
782 #if @GNULIB_FREXPL@ && @REPLACE_FREXPL@
783 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
785 # define frexpl rpl_frexpl
787 _GL_FUNCDECL_RPL (frexpl, long double,
788 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
789 _GL_CXXALIAS_RPL (frexpl, long double, (long double x, int *expptr));
791 # if !@HAVE_DECL_FREXPL@
792 _GL_FUNCDECL_SYS (frexpl, long double,
793 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
796 _GL_CXXALIAS_SYS (frexpl, long double, (long double x, int *expptr));
799 #if @GNULIB_FREXPL@ && !(@REPLACE_FREXPL@ && !@HAVE_DECL_FREXPL@)
800 _GL_CXXALIASWARN (frexpl);
802 #if !@GNULIB_FREXPL@ && defined GNULIB_POSIXCHECK
804 # if HAVE_RAW_DECL_FREXPL
805 _GL_WARN_ON_USE (frexpl, "frexpl is unportable - "
806 "use gnulib module frexpl for portability");
811 /* Return sqrt(x^2+y^2). */
813 # if @REPLACE_HYPOTF@
814 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
816 # define hypotf rpl_hypotf
818 _GL_FUNCDECL_RPL (hypotf, float, (float x, float y));
819 _GL_CXXALIAS_RPL (hypotf, float, (float x, float y));
822 _GL_FUNCDECL_SYS (hypotf, float, (float x, float y));
824 _GL_CXXALIAS_SYS (hypotf, float, (float x, float y));
826 _GL_CXXALIASWARN (hypotf);
827 #elif defined GNULIB_POSIXCHECK
829 # if HAVE_RAW_DECL_HYPOTF
830 _GL_WARN_ON_USE (hypotf, "hypotf is unportable - "
831 "use gnulib module hypotf for portability");
835 /* Return sqrt(x^2+y^2). */
838 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
840 # define hypot rpl_hypot
842 _GL_FUNCDECL_RPL (hypot, double, (double x, double y));
843 _GL_CXXALIAS_RPL (hypot, double, (double x, double y));
845 _GL_CXXALIAS_SYS (hypot, double, (double x, double y));
847 _GL_CXXALIASWARN (hypot);
848 #elif defined GNULIB_POSIXCHECK
850 # if HAVE_RAW_DECL_HYPOT
851 _GL_WARN_ON_USE (hypotf, "hypot has portability problems - "
852 "use gnulib module hypot for portability");
856 /* Return sqrt(x^2+y^2). */
858 # if @REPLACE_HYPOTL@
859 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
861 # define hypotl rpl_hypotl
863 _GL_FUNCDECL_RPL (hypotl, long double, (long double x, long double y));
864 _GL_CXXALIAS_RPL (hypotl, long double, (long double x, long double y));
867 _GL_FUNCDECL_SYS (hypotl, long double, (long double x, long double y));
869 _GL_CXXALIAS_SYS (hypotl, long double, (long double x, long double y));
871 _GL_CXXALIASWARN (hypotl);
872 #elif defined GNULIB_POSIXCHECK
874 # if HAVE_RAW_DECL_HYPOTL
875 _GL_WARN_ON_USE (hypotl, "hypotl is unportable - "
876 "use gnulib module hypotl for portability");
881 /* Return x * 2^exp. */
885 _GL_FUNCDECL_SYS (ldexpf, float, (float x, int exp));
887 _GL_CXXALIAS_SYS (ldexpf, float, (float x, int exp));
888 _GL_CXXALIASWARN (ldexpf);
889 #elif defined GNULIB_POSIXCHECK
891 # if HAVE_RAW_DECL_LDEXPF
892 _GL_WARN_ON_USE (ldexpf, "ldexpf is unportable - "
893 "use gnulib module ldexpf for portability");
897 /* Return x * 2^exp. */
898 #if @GNULIB_LDEXPL@ && @REPLACE_LDEXPL@
899 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
901 # define ldexpl rpl_ldexpl
903 _GL_FUNCDECL_RPL (ldexpl, long double, (long double x, int exp));
904 _GL_CXXALIAS_RPL (ldexpl, long double, (long double x, int exp));
906 # if !@HAVE_DECL_LDEXPL@
907 _GL_FUNCDECL_SYS (ldexpl, long double, (long double x, int exp));
910 _GL_CXXALIAS_SYS (ldexpl, long double, (long double x, int exp));
914 _GL_CXXALIASWARN (ldexpl);
916 #if !@GNULIB_LDEXPL@ && defined GNULIB_POSIXCHECK
918 # if HAVE_RAW_DECL_LDEXPL
919 _GL_WARN_ON_USE (ldexpl, "ldexpl is unportable - "
920 "use gnulib module ldexpl for portability");
926 # if !@HAVE_DECL_LOGB@
927 _GL_EXTERN_C double logb (double x);
929 #elif defined GNULIB_POSIXCHECK
931 # if HAVE_RAW_DECL_LOGB
932 _GL_WARN_ON_USE (logb, "logb is unportable - "
933 "use gnulib module logb for portability");
941 _GL_FUNCDECL_SYS (logf, float, (float x));
943 _GL_CXXALIAS_SYS (logf, float, (float x));
944 _GL_CXXALIASWARN (logf);
945 #elif defined GNULIB_POSIXCHECK
947 # if HAVE_RAW_DECL_LOGF
948 _GL_WARN_ON_USE (logf, "logf is unportable - "
949 "use gnulib module logf for portability");
954 # if !@HAVE_LOGL@ || !@HAVE_DECL_LOGL@
956 _GL_FUNCDECL_SYS (logl, long double, (long double x));
958 _GL_CXXALIAS_SYS (logl, long double, (long double x));
959 _GL_CXXALIASWARN (logl);
960 #elif defined GNULIB_POSIXCHECK
962 # if HAVE_RAW_DECL_LOGL
963 _GL_WARN_ON_USE (logl, "logl is unportable - "
964 "use gnulib module mathl for portability");
972 _GL_FUNCDECL_SYS (log10f, float, (float x));
974 _GL_CXXALIAS_SYS (log10f, float, (float x));
975 _GL_CXXALIASWARN (log10f);
976 #elif defined GNULIB_POSIXCHECK
978 # if HAVE_RAW_DECL_LOG10F
979 _GL_WARN_ON_USE (log10f, "log10f is unportable - "
980 "use gnulib module log10f for portability");
985 # if !@HAVE_LOG10L@ || !@HAVE_DECL_LOG10L@
987 _GL_FUNCDECL_SYS (log10l, long double, (long double x));
989 _GL_CXXALIAS_SYS (log10l, long double, (long double x));
990 _GL_CXXALIASWARN (log10l);
991 #elif defined GNULIB_POSIXCHECK
993 # if HAVE_RAW_DECL_LOG10L
994 _GL_WARN_ON_USE (log10l, "log10l is unportable - "
995 "use gnulib module log10l for portability");
1001 # if @REPLACE_MODFF@
1002 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1004 # define modff rpl_modff
1006 _GL_FUNCDECL_RPL (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
1007 _GL_CXXALIAS_RPL (modff, float, (float x, float *iptr));
1011 _GL_FUNCDECL_SYS (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
1013 _GL_CXXALIAS_SYS (modff, float, (float x, float *iptr));
1015 _GL_CXXALIASWARN (modff);
1016 #elif defined GNULIB_POSIXCHECK
1018 # if HAVE_RAW_DECL_MODFF
1019 _GL_WARN_ON_USE (modff, "modff is unportable - "
1020 "use gnulib module modff for portability");
1026 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1028 # define modf rpl_modf
1030 _GL_FUNCDECL_RPL (modf, double, (double x, double *iptr) _GL_ARG_NONNULL ((2)));
1031 _GL_CXXALIAS_RPL (modf, double, (double x, double *iptr));
1033 _GL_CXXALIAS_SYS (modf, double, (double x, double *iptr));
1035 _GL_CXXALIASWARN (modf);
1036 #elif defined GNULIB_POSIXCHECK
1038 # if HAVE_RAW_DECL_MODF
1039 _GL_WARN_ON_USE (modf, "modf has portability problems - "
1040 "use gnulib module modf for portability");
1045 # if @REPLACE_MODFL@
1046 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1048 # define modfl rpl_modfl
1050 _GL_FUNCDECL_RPL (modfl, long double, (long double x, long double *iptr)
1051 _GL_ARG_NONNULL ((2)));
1052 _GL_CXXALIAS_RPL (modfl, long double, (long double x, long double *iptr));
1056 _GL_FUNCDECL_SYS (modfl, long double, (long double x, long double *iptr)
1057 _GL_ARG_NONNULL ((2)));
1059 _GL_CXXALIAS_SYS (modfl, long double, (long double x, long double *iptr));
1061 _GL_CXXALIASWARN (modfl);
1062 #elif defined GNULIB_POSIXCHECK
1064 # if HAVE_RAW_DECL_MODFL
1065 _GL_WARN_ON_USE (modfl, "modfl is unportable - "
1066 "use gnulib module modfl for portability");
1074 _GL_FUNCDECL_SYS (powf, float, (float x, float y));
1076 _GL_CXXALIAS_SYS (powf, float, (float x, float y));
1077 _GL_CXXALIASWARN (powf);
1078 #elif defined GNULIB_POSIXCHECK
1080 # if HAVE_RAW_DECL_POWF
1081 _GL_WARN_ON_USE (powf, "powf is unportable - "
1082 "use gnulib module powf for portability");
1087 #if @GNULIB_REMAINDERF@
1088 # if @REPLACE_REMAINDERF@
1089 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1091 # define remainderf rpl_remainderf
1093 _GL_FUNCDECL_RPL (remainderf, float, (float x, float y));
1094 _GL_CXXALIAS_RPL (remainderf, float, (float x, float y));
1096 # if !@HAVE_REMAINDERF@
1097 _GL_FUNCDECL_SYS (remainderf, float, (float x, float y));
1099 _GL_CXXALIAS_SYS (remainderf, float, (float x, float y));
1101 _GL_CXXALIASWARN (remainderf);
1102 #elif defined GNULIB_POSIXCHECK
1104 # if HAVE_RAW_DECL_REMAINDERF
1105 _GL_WARN_ON_USE (remainderf, "remainderf is unportable - "
1106 "use gnulib module remainderf for portability");
1110 #if @GNULIB_REMAINDER@
1111 # if @REPLACE_REMAINDER@
1112 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1114 # define remainder rpl_remainder
1116 _GL_FUNCDECL_RPL (remainder, double, (double x, double y));
1117 _GL_CXXALIAS_RPL (remainder, double, (double x, double y));
1119 # if !@HAVE_REMAINDER@ || !@HAVE_DECL_REMAINDER@
1120 _GL_FUNCDECL_SYS (remainder, double, (double x, double y));
1122 _GL_CXXALIAS_SYS (remainder, double, (double x, double y));
1124 _GL_CXXALIASWARN (remainder);
1125 #elif defined GNULIB_POSIXCHECK
1127 # if HAVE_RAW_DECL_REMAINDER
1128 _GL_WARN_ON_USE (remainder, "remainder is unportable - "
1129 "use gnulib module remainder for portability");
1133 #if @GNULIB_REMAINDERL@
1134 # if @REPLACE_REMAINDERL@
1135 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1137 # define remainderl rpl_remainderl
1139 _GL_FUNCDECL_RPL (remainderl, long double, (long double x, long double y));
1140 _GL_CXXALIAS_RPL (remainderl, long double, (long double x, long double y));
1142 # if !@HAVE_REMAINDERL@
1143 _GL_FUNCDECL_SYS (remainderl, long double, (long double x, long double y));
1145 _GL_CXXALIAS_SYS (remainderl, long double, (long double x, long double y));
1147 _GL_CXXALIASWARN (remainderl);
1148 #elif defined GNULIB_POSIXCHECK
1150 # if HAVE_RAW_DECL_REMAINDERL
1151 _GL_WARN_ON_USE (remainderl, "remainderl is unportable - "
1152 "use gnulib module remainderl for portability");
1159 _GL_FUNCDECL_SYS (rintf, float, (float x));
1161 _GL_CXXALIAS_SYS (rintf, float, (float x));
1162 _GL_CXXALIASWARN (rintf);
1163 #elif defined GNULIB_POSIXCHECK
1165 # if HAVE_RAW_DECL_RINTF
1166 _GL_WARN_ON_USE (rintf, "rintf is unportable - "
1167 "use gnulib module rintf for portability");
1173 _GL_FUNCDECL_SYS (rint, double, (double x));
1175 _GL_CXXALIAS_SYS (rint, double, (double x));
1176 _GL_CXXALIASWARN (rint);
1177 #elif defined GNULIB_POSIXCHECK
1179 # if HAVE_RAW_DECL_RINT
1180 _GL_WARN_ON_USE (rint, "rint is unportable - "
1181 "use gnulib module rint for portability");
1187 _GL_FUNCDECL_SYS (rintl, long double, (long double x));
1189 _GL_CXXALIAS_SYS (rintl, long double, (long double x));
1190 _GL_CXXALIASWARN (rintl);
1191 #elif defined GNULIB_POSIXCHECK
1193 # if HAVE_RAW_DECL_RINTL
1194 _GL_WARN_ON_USE (rintl, "rintl is unportable - "
1195 "use gnulib module rintl for portability");
1201 # if @REPLACE_ROUNDF@
1202 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1204 # define roundf rpl_roundf
1206 _GL_FUNCDECL_RPL (roundf, float, (float x));
1207 _GL_CXXALIAS_RPL (roundf, float, (float x));
1209 # if !@HAVE_DECL_ROUNDF@
1210 _GL_FUNCDECL_SYS (roundf, float, (float x));
1212 _GL_CXXALIAS_SYS (roundf, float, (float x));
1214 _GL_CXXALIASWARN (roundf);
1215 #elif defined GNULIB_POSIXCHECK
1217 # if HAVE_RAW_DECL_ROUNDF
1218 _GL_WARN_ON_USE (roundf, "roundf is unportable - "
1219 "use gnulib module roundf for portability");
1224 # if @REPLACE_ROUND@
1225 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1227 # define round rpl_round
1229 _GL_FUNCDECL_RPL (round, double, (double x));
1230 _GL_CXXALIAS_RPL (round, double, (double x));
1232 # if !@HAVE_DECL_ROUND@
1233 _GL_FUNCDECL_SYS (round, double, (double x));
1235 _GL_CXXALIAS_SYS (round, double, (double x));
1237 _GL_CXXALIASWARN (round);
1238 #elif defined GNULIB_POSIXCHECK
1240 # if HAVE_RAW_DECL_ROUND
1241 _GL_WARN_ON_USE (round, "round is unportable - "
1242 "use gnulib module round for portability");
1247 # if @REPLACE_ROUNDL@
1248 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1250 # define roundl rpl_roundl
1252 _GL_FUNCDECL_RPL (roundl, long double, (long double x));
1253 _GL_CXXALIAS_RPL (roundl, long double, (long double x));
1255 # if !@HAVE_DECL_ROUNDL@
1256 _GL_FUNCDECL_SYS (roundl, long double, (long double x));
1258 _GL_CXXALIAS_SYS (roundl, long double, (long double x));
1260 _GL_CXXALIASWARN (roundl);
1261 #elif defined GNULIB_POSIXCHECK
1263 # if HAVE_RAW_DECL_ROUNDL
1264 _GL_WARN_ON_USE (roundl, "roundl is unportable - "
1265 "use gnulib module roundl for portability");
1273 _GL_FUNCDECL_SYS (sinf, float, (float x));
1275 _GL_CXXALIAS_SYS (sinf, float, (float x));
1276 _GL_CXXALIASWARN (sinf);
1277 #elif defined GNULIB_POSIXCHECK
1279 # if HAVE_RAW_DECL_SINF
1280 _GL_WARN_ON_USE (sinf, "sinf is unportable - "
1281 "use gnulib module sinf for portability");
1286 # if !@HAVE_SINL@ || !@HAVE_DECL_SINL@
1288 _GL_FUNCDECL_SYS (sinl, long double, (long double x));
1290 _GL_CXXALIAS_SYS (sinl, long double, (long double x));
1291 _GL_CXXALIASWARN (sinl);
1292 #elif defined GNULIB_POSIXCHECK
1294 # if HAVE_RAW_DECL_SINL
1295 _GL_WARN_ON_USE (sinl, "sinl is unportable - "
1296 "use gnulib module mathl for portability");
1304 _GL_FUNCDECL_SYS (sinhf, float, (float x));
1306 _GL_CXXALIAS_SYS (sinhf, float, (float x));
1307 _GL_CXXALIASWARN (sinhf);
1308 #elif defined GNULIB_POSIXCHECK
1310 # if HAVE_RAW_DECL_SINHF
1311 _GL_WARN_ON_USE (sinhf, "sinhf is unportable - "
1312 "use gnulib module sinhf for portability");
1320 _GL_FUNCDECL_SYS (sqrtf, float, (float x));
1322 _GL_CXXALIAS_SYS (sqrtf, float, (float x));
1323 _GL_CXXALIASWARN (sqrtf);
1324 #elif defined GNULIB_POSIXCHECK
1326 # if HAVE_RAW_DECL_SQRTF
1327 _GL_WARN_ON_USE (sqrtf, "sqrtf is unportable - "
1328 "use gnulib module sqrtf for portability");
1333 # if !@HAVE_SQRTL@ || !@HAVE_DECL_SQRTL@
1335 _GL_FUNCDECL_SYS (sqrtl, long double, (long double x));
1337 _GL_CXXALIAS_SYS (sqrtl, long double, (long double x));
1338 _GL_CXXALIASWARN (sqrtl);
1339 #elif defined GNULIB_POSIXCHECK
1341 # if HAVE_RAW_DECL_SQRTL
1342 _GL_WARN_ON_USE (sqrtl, "sqrtl is unportable - "
1343 "use gnulib module mathl for portability");
1351 _GL_FUNCDECL_SYS (tanf, float, (float x));
1353 _GL_CXXALIAS_SYS (tanf, float, (float x));
1354 _GL_CXXALIASWARN (tanf);
1355 #elif defined GNULIB_POSIXCHECK
1357 # if HAVE_RAW_DECL_TANF
1358 _GL_WARN_ON_USE (tanf, "tanf is unportable - "
1359 "use gnulib module tanf for portability");
1364 # if !@HAVE_TANL@ || !@HAVE_DECL_TANL@
1366 _GL_FUNCDECL_SYS (tanl, long double, (long double x));
1368 _GL_CXXALIAS_SYS (tanl, long double, (long double x));
1369 _GL_CXXALIASWARN (tanl);
1370 #elif defined GNULIB_POSIXCHECK
1372 # if HAVE_RAW_DECL_TANL
1373 _GL_WARN_ON_USE (tanl, "tanl is unportable - "
1374 "use gnulib module mathl for portability");
1382 _GL_FUNCDECL_SYS (tanhf, float, (float x));
1384 _GL_CXXALIAS_SYS (tanhf, float, (float x));
1385 _GL_CXXALIASWARN (tanhf);
1386 #elif defined GNULIB_POSIXCHECK
1388 # if HAVE_RAW_DECL_TANHF
1389 _GL_WARN_ON_USE (tanhf, "tanhf is unportable - "
1390 "use gnulib module tanhf for portability");
1396 # if @REPLACE_TRUNCF@
1397 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1398 # define truncf rpl_truncf
1400 _GL_FUNCDECL_RPL (truncf, float, (float x));
1401 _GL_CXXALIAS_RPL (truncf, float, (float x));
1403 # if !@HAVE_DECL_TRUNCF@
1404 _GL_FUNCDECL_SYS (truncf, float, (float x));
1406 _GL_CXXALIAS_SYS (truncf, float, (float x));
1408 _GL_CXXALIASWARN (truncf);
1409 #elif defined GNULIB_POSIXCHECK
1411 # if HAVE_RAW_DECL_TRUNCF
1412 _GL_WARN_ON_USE (truncf, "truncf is unportable - "
1413 "use gnulib module truncf for portability");
1418 # if @REPLACE_TRUNC@
1419 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1420 # define trunc rpl_trunc
1422 _GL_FUNCDECL_RPL (trunc, double, (double x));
1423 _GL_CXXALIAS_RPL (trunc, double, (double x));
1425 # if !@HAVE_DECL_TRUNC@
1426 _GL_FUNCDECL_SYS (trunc, double, (double x));
1428 _GL_CXXALIAS_SYS (trunc, double, (double x));
1430 _GL_CXXALIASWARN (trunc);
1431 #elif defined GNULIB_POSIXCHECK
1433 # if HAVE_RAW_DECL_TRUNC
1434 _GL_WARN_ON_USE (trunc, "trunc is unportable - "
1435 "use gnulib module trunc for portability");
1440 # if @REPLACE_TRUNCL@
1441 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1443 # define truncl rpl_truncl
1445 _GL_FUNCDECL_RPL (truncl, long double, (long double x));
1446 _GL_CXXALIAS_RPL (truncl, long double, (long double x));
1448 # if !@HAVE_DECL_TRUNCL@
1449 _GL_FUNCDECL_SYS (truncl, long double, (long double x));
1451 _GL_CXXALIAS_SYS (truncl, long double, (long double x));
1453 _GL_CXXALIASWARN (truncl);
1454 #elif defined GNULIB_POSIXCHECK
1456 # if HAVE_RAW_DECL_TRUNCL
1457 _GL_WARN_ON_USE (truncl, "truncl is unportable - "
1458 "use gnulib module truncl for portability");
1463 /* Definitions of function-like macros come here, after the function
1467 #if @GNULIB_ISFINITE@
1468 # if @REPLACE_ISFINITE@
1469 _GL_EXTERN_C int gl_isfinitef (float x);
1470 _GL_EXTERN_C int gl_isfinited (double x);
1471 _GL_EXTERN_C int gl_isfinitel (long double x);
1473 # define isfinite(x) \
1474 (sizeof (x) == sizeof (long double) ? gl_isfinitel (x) : \
1475 sizeof (x) == sizeof (double) ? gl_isfinited (x) : \
1480 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isfinite)
1482 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isfinite)
1485 #elif defined GNULIB_POSIXCHECK
1486 # if defined isfinite
1487 _GL_WARN_REAL_FLOATING_DECL (isfinite);
1489 # define isfinite(x) _GL_WARN_REAL_FLOATING_IMPL (isfinite, x)
1495 # if @REPLACE_ISINF@
1496 _GL_EXTERN_C int gl_isinff (float x);
1497 _GL_EXTERN_C int gl_isinfd (double x);
1498 _GL_EXTERN_C int gl_isinfl (long double x);
1501 (sizeof (x) == sizeof (long double) ? gl_isinfl (x) : \
1502 sizeof (x) == sizeof (double) ? gl_isinfd (x) : \
1507 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isinf)
1509 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isinf)
1512 #elif defined GNULIB_POSIXCHECK
1514 _GL_WARN_REAL_FLOATING_DECL (isinf);
1516 # define isinf(x) _GL_WARN_REAL_FLOATING_IMPL (isinf, x)
1522 /* Test for NaN for 'float' numbers. */
1524 /* The original <math.h> included above provides a declaration of isnan macro
1525 or (older) isnanf function. */
1527 /* GCC 4.0 and newer provides three built-ins for isnan. */
1529 # define isnanf(x) __builtin_isnanf ((float)(x))
1530 # elif defined isnan
1532 # define isnanf(x) isnan ((float)(x))
1535 /* Test whether X is a NaN. */
1537 # define isnanf rpl_isnanf
1538 _GL_EXTERN_C int isnanf (float x);
1543 /* Test for NaN for 'double' numbers.
1544 This function is a gnulib extension, unlike isnan() which applied only
1545 to 'double' numbers earlier but now is a type-generic macro. */
1547 /* The original <math.h> included above provides a declaration of isnan
1550 /* GCC 4.0 and newer provides three built-ins for isnan. */
1552 # define isnand(x) __builtin_isnan ((double)(x))
1555 # define isnand(x) isnan ((double)(x))
1558 /* Test whether X is a NaN. */
1560 # define isnand rpl_isnand
1561 _GL_EXTERN_C int isnand (double x);
1566 /* Test for NaN for 'long double' numbers. */
1568 /* The original <math.h> included above provides a declaration of isnan
1569 macro or (older) isnanl function. */
1571 /* GCC 4.0 and newer provides three built-ins for isnan. */
1573 # define isnanl(x) __builtin_isnanl ((long double)(x))
1574 # elif defined isnan
1576 # define isnanl(x) isnan ((long double)(x))
1579 /* Test whether X is a NaN. */
1581 # define isnanl rpl_isnanl
1582 _GL_EXTERN_C int isnanl (long double x) _GL_ATTRIBUTE_CONST;
1586 /* This must come *after* the snippets for GNULIB_ISNANF and GNULIB_ISNANL! */
1588 # if @REPLACE_ISNAN@
1589 /* We can't just use the isnanf macro (e.g.) as exposed by
1590 isnanf.h (e.g.) here, because those may end up being macros
1591 that recursively expand back to isnan. So use the gnulib
1592 replacements for them directly. */
1593 # if @HAVE_ISNANF@ && __GNUC__ >= 4
1594 # define gl_isnan_f(x) __builtin_isnanf ((float)(x))
1596 _GL_EXTERN_C int rpl_isnanf (float x);
1597 # define gl_isnan_f(x) rpl_isnanf (x)
1599 # if @HAVE_ISNAND@ && __GNUC__ >= 4
1600 # define gl_isnan_d(x) __builtin_isnan ((double)(x))
1602 _GL_EXTERN_C int rpl_isnand (double x);
1603 # define gl_isnan_d(x) rpl_isnand (x)
1605 # if @HAVE_ISNANL@ && __GNUC__ >= 4
1606 # define gl_isnan_l(x) __builtin_isnanl ((long double)(x))
1608 _GL_EXTERN_C int rpl_isnanl (long double x) _GL_ATTRIBUTE_CONST;
1609 # define gl_isnan_l(x) rpl_isnanl (x)
1613 (sizeof (x) == sizeof (long double) ? gl_isnan_l (x) : \
1614 sizeof (x) == sizeof (double) ? gl_isnan_d (x) : \
1616 # elif __GNUC__ >= 4
1619 (sizeof (x) == sizeof (long double) ? __builtin_isnanl ((long double)(x)) : \
1620 sizeof (x) == sizeof (double) ? __builtin_isnan ((double)(x)) : \
1621 __builtin_isnanf ((float)(x)))
1625 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isnan)
1627 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isnan)
1630 /* Ensure isnan is a macro. */
1632 # define isnan isnan
1635 #elif defined GNULIB_POSIXCHECK
1637 _GL_WARN_REAL_FLOATING_DECL (isnan);
1639 # define isnan(x) _GL_WARN_REAL_FLOATING_IMPL (isnan, x)
1644 #if @GNULIB_SIGNBIT@
1645 # if @REPLACE_SIGNBIT_USING_GCC@
1647 /* GCC 4.0 and newer provides three built-ins for signbit. */
1648 # define signbit(x) \
1649 (sizeof (x) == sizeof (long double) ? __builtin_signbitl (x) : \
1650 sizeof (x) == sizeof (double) ? __builtin_signbit (x) : \
1651 __builtin_signbitf (x))
1653 # if @REPLACE_SIGNBIT@
1655 _GL_EXTERN_C int gl_signbitf (float arg);
1656 _GL_EXTERN_C int gl_signbitd (double arg);
1657 _GL_EXTERN_C int gl_signbitl (long double arg);
1658 # if __GNUC__ >= 2 && !defined __STRICT_ANSI__
1659 # define _GL_NUM_UINT_WORDS(type) \
1660 ((sizeof (type) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
1661 # if defined FLT_SIGNBIT_WORD && defined FLT_SIGNBIT_BIT && !defined gl_signbitf
1662 # define gl_signbitf_OPTIMIZED_MACRO
1663 # define gl_signbitf(arg) \
1664 ({ union { float _value; \
1665 unsigned int _word[_GL_NUM_UINT_WORDS (float)]; \
1667 _m._value = (arg); \
1668 (_m._word[FLT_SIGNBIT_WORD] >> FLT_SIGNBIT_BIT) & 1; \
1671 # if defined DBL_SIGNBIT_WORD && defined DBL_SIGNBIT_BIT && !defined gl_signbitd
1672 # define gl_signbitd_OPTIMIZED_MACRO
1673 # define gl_signbitd(arg) \
1674 ({ union { double _value; \
1675 unsigned int _word[_GL_NUM_UINT_WORDS (double)]; \
1677 _m._value = (arg); \
1678 (_m._word[DBL_SIGNBIT_WORD] >> DBL_SIGNBIT_BIT) & 1; \
1681 # if defined LDBL_SIGNBIT_WORD && defined LDBL_SIGNBIT_BIT && !defined gl_signbitl
1682 # define gl_signbitl_OPTIMIZED_MACRO
1683 # define gl_signbitl(arg) \
1684 ({ union { long double _value; \
1685 unsigned int _word[_GL_NUM_UINT_WORDS (long double)]; \
1687 _m._value = (arg); \
1688 (_m._word[LDBL_SIGNBIT_WORD] >> LDBL_SIGNBIT_BIT) & 1; \
1692 # define signbit(x) \
1693 (sizeof (x) == sizeof (long double) ? gl_signbitl (x) : \
1694 sizeof (x) == sizeof (double) ? gl_signbitd (x) : \
1699 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (signbit)
1701 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (signbit)
1704 #elif defined GNULIB_POSIXCHECK
1705 # if defined signbit
1706 _GL_WARN_REAL_FLOATING_DECL (signbit);
1708 # define signbit(x) _GL_WARN_REAL_FLOATING_IMPL (signbit, x)
1713 #endif /* _@GUARD_PREFIX@_MATH_H */
1714 #endif /* _@GUARD_PREFIX@_MATH_H */