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_VAL (1.0 / 0.0)
152 _GL_FUNCDECL_SYS (acosf, float, (float x));
154 _GL_CXXALIAS_SYS (acosf, float, (float x));
155 _GL_CXXALIASWARN (acosf);
156 #elif defined GNULIB_POSIXCHECK
158 # if HAVE_RAW_DECL_ACOSF
159 _GL_WARN_ON_USE (acosf, "acosf is unportable - "
160 "use gnulib module acosf for portability");
165 # if !@HAVE_ACOSL@ || !@HAVE_DECL_ACOSL@
167 _GL_FUNCDECL_SYS (acosl, long double, (long double x));
169 _GL_CXXALIAS_SYS (acosl, long double, (long double x));
170 _GL_CXXALIASWARN (acosl);
171 #elif defined GNULIB_POSIXCHECK
173 # if HAVE_RAW_DECL_ACOSL
174 _GL_WARN_ON_USE (acosl, "acosl is unportable - "
175 "use gnulib module mathl for portability");
183 _GL_FUNCDECL_SYS (asinf, float, (float x));
185 _GL_CXXALIAS_SYS (asinf, float, (float x));
186 _GL_CXXALIASWARN (asinf);
187 #elif defined GNULIB_POSIXCHECK
189 # if HAVE_RAW_DECL_ASINF
190 _GL_WARN_ON_USE (asinf, "asinf is unportable - "
191 "use gnulib module asinf for portability");
196 # if !@HAVE_ASINL@ || !@HAVE_DECL_ASINL@
198 _GL_FUNCDECL_SYS (asinl, long double, (long double x));
200 _GL_CXXALIAS_SYS (asinl, long double, (long double x));
201 _GL_CXXALIASWARN (asinl);
202 #elif defined GNULIB_POSIXCHECK
204 # if HAVE_RAW_DECL_ASINL
205 _GL_WARN_ON_USE (asinl, "asinl is unportable - "
206 "use gnulib module mathl for portability");
214 _GL_FUNCDECL_SYS (atanf, float, (float x));
216 _GL_CXXALIAS_SYS (atanf, float, (float x));
217 _GL_CXXALIASWARN (atanf);
218 #elif defined GNULIB_POSIXCHECK
220 # if HAVE_RAW_DECL_ATANF
221 _GL_WARN_ON_USE (atanf, "atanf is unportable - "
222 "use gnulib module atanf for portability");
227 # if !@HAVE_ATANL@ || !@HAVE_DECL_ATANL@
229 _GL_FUNCDECL_SYS (atanl, long double, (long double x));
231 _GL_CXXALIAS_SYS (atanl, long double, (long double x));
232 _GL_CXXALIASWARN (atanl);
233 #elif defined GNULIB_POSIXCHECK
235 # if HAVE_RAW_DECL_ATANL
236 _GL_WARN_ON_USE (atanl, "atanl is unportable - "
237 "use gnulib module mathl for portability");
245 _GL_FUNCDECL_SYS (atan2f, float, (float y, float x));
247 _GL_CXXALIAS_SYS (atan2f, float, (float y, float x));
248 _GL_CXXALIASWARN (atan2f);
249 #elif defined GNULIB_POSIXCHECK
251 # if HAVE_RAW_DECL_ATAN2F
252 _GL_WARN_ON_USE (atan2f, "atan2f is unportable - "
253 "use gnulib module atan2f for portability");
260 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
262 # define ceilf rpl_ceilf
264 _GL_FUNCDECL_RPL (ceilf, float, (float x));
265 _GL_CXXALIAS_RPL (ceilf, float, (float x));
267 # if !@HAVE_DECL_CEILF@
269 _GL_FUNCDECL_SYS (ceilf, float, (float x));
271 _GL_CXXALIAS_SYS (ceilf, float, (float x));
273 _GL_CXXALIASWARN (ceilf);
274 #elif defined GNULIB_POSIXCHECK
276 # if HAVE_RAW_DECL_CEILF
277 _GL_WARN_ON_USE (ceilf, "ceilf is unportable - "
278 "use gnulib module ceilf for portability");
284 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
285 # define ceil rpl_ceil
287 _GL_FUNCDECL_RPL (ceil, double, (double x));
288 _GL_CXXALIAS_RPL (ceil, double, (double x));
290 _GL_CXXALIAS_SYS (ceil, double, (double x));
292 _GL_CXXALIASWARN (ceil);
297 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
299 # define ceill rpl_ceill
301 _GL_FUNCDECL_RPL (ceill, long double, (long double x));
302 _GL_CXXALIAS_RPL (ceill, long double, (long double x));
304 # if !@HAVE_DECL_CEILL@
306 _GL_FUNCDECL_SYS (ceill, long double, (long double x));
308 _GL_CXXALIAS_SYS (ceill, long double, (long double x));
310 _GL_CXXALIASWARN (ceill);
311 #elif defined GNULIB_POSIXCHECK
313 # if HAVE_RAW_DECL_CEILL
314 _GL_WARN_ON_USE (ceill, "ceill is unportable - "
315 "use gnulib module ceill for portability");
320 #if @GNULIB_COPYSIGNF@
321 # if !@HAVE_COPYSIGNF@
322 _GL_FUNCDECL_SYS (copysignf, float, (float x, float y));
324 _GL_CXXALIAS_SYS (copysignf, float, (float x, float y));
325 _GL_CXXALIASWARN (copysignf);
326 #elif defined GNULIB_POSIXCHECK
328 # if HAVE_RAW_DECL_COPYSIGNF
329 _GL_WARN_ON_USE (copysignf, "copysignf is unportable - "
330 "use gnulib module copysignf for portability");
334 #if @GNULIB_COPYSIGN@
335 # if !@HAVE_COPYSIGN@
336 _GL_FUNCDECL_SYS (copysign, double, (double x, double y));
338 _GL_CXXALIAS_SYS (copysign, double, (double x, double y));
339 _GL_CXXALIASWARN (copysign);
340 #elif defined GNULIB_POSIXCHECK
342 # if HAVE_RAW_DECL_COPYSIGN
343 _GL_WARN_ON_USE (copysign, "copysign is unportable - "
344 "use gnulib module copysign for portability");
348 #if @GNULIB_COPYSIGNL@
349 # if !@HAVE_COPYSIGNL@
350 _GL_FUNCDECL_SYS (copysignl, long double, (long double x, long double y));
352 _GL_CXXALIAS_SYS (copysignl, long double, (long double x, long double y));
353 _GL_CXXALIASWARN (copysignl);
354 #elif defined GNULIB_POSIXCHECK
356 # if HAVE_RAW_DECL_COPYSIGNL
357 _GL_WARN_ON_USE (copysign, "copysignl is unportable - "
358 "use gnulib module copysignl for portability");
366 _GL_FUNCDECL_SYS (cosf, float, (float x));
368 _GL_CXXALIAS_SYS (cosf, float, (float x));
369 _GL_CXXALIASWARN (cosf);
370 #elif defined GNULIB_POSIXCHECK
372 # if HAVE_RAW_DECL_COSF
373 _GL_WARN_ON_USE (cosf, "cosf is unportable - "
374 "use gnulib module cosf for portability");
379 # if !@HAVE_COSL@ || !@HAVE_DECL_COSL@
381 _GL_FUNCDECL_SYS (cosl, long double, (long double x));
383 _GL_CXXALIAS_SYS (cosl, long double, (long double x));
384 _GL_CXXALIASWARN (cosl);
385 #elif defined GNULIB_POSIXCHECK
387 # if HAVE_RAW_DECL_COSL
388 _GL_WARN_ON_USE (cosl, "cosl is unportable - "
389 "use gnulib module mathl for portability");
397 _GL_FUNCDECL_SYS (coshf, float, (float x));
399 _GL_CXXALIAS_SYS (coshf, float, (float x));
400 _GL_CXXALIASWARN (coshf);
401 #elif defined GNULIB_POSIXCHECK
403 # if HAVE_RAW_DECL_COSHF
404 _GL_WARN_ON_USE (coshf, "coshf is unportable - "
405 "use gnulib module coshf for portability");
413 _GL_FUNCDECL_SYS (expf, float, (float x));
415 _GL_CXXALIAS_SYS (expf, float, (float x));
416 _GL_CXXALIASWARN (expf);
417 #elif defined GNULIB_POSIXCHECK
419 # if HAVE_RAW_DECL_EXPF
420 _GL_WARN_ON_USE (expf, "expf is unportable - "
421 "use gnulib module expf for portability");
426 # if !@HAVE_EXPL@ || !@HAVE_DECL_EXPL@
428 _GL_FUNCDECL_SYS (expl, long double, (long double x));
430 _GL_CXXALIAS_SYS (expl, long double, (long double x));
431 _GL_CXXALIASWARN (expl);
432 #elif defined GNULIB_POSIXCHECK
434 # if HAVE_RAW_DECL_EXPL
435 _GL_WARN_ON_USE (expl, "expl is unportable - "
436 "use gnulib module mathl for portability");
444 _GL_FUNCDECL_SYS (fabsf, float, (float x));
446 _GL_CXXALIAS_SYS (fabsf, float, (float x));
447 _GL_CXXALIASWARN (fabsf);
448 #elif defined GNULIB_POSIXCHECK
450 # if HAVE_RAW_DECL_FABSF
451 _GL_WARN_ON_USE (fabsf, "fabsf is unportable - "
452 "use gnulib module fabsf for portability");
458 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
460 # define fabsl rpl_fabsl
462 _GL_FUNCDECL_RPL (fabsl, long double, (long double x));
463 _GL_CXXALIAS_RPL (fabsl, long double, (long double x));
467 _GL_FUNCDECL_SYS (fabsl, long double, (long double x));
469 _GL_CXXALIAS_SYS (fabsl, long double, (long double x));
471 _GL_CXXALIASWARN (fabsl);
472 #elif defined GNULIB_POSIXCHECK
474 # if HAVE_RAW_DECL_FABSL
475 _GL_WARN_ON_USE (fabsl, "fabsl is unportable - "
476 "use gnulib module fabsl for portability");
482 # if @REPLACE_FLOORF@
483 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
485 # define floorf rpl_floorf
487 _GL_FUNCDECL_RPL (floorf, float, (float x));
488 _GL_CXXALIAS_RPL (floorf, float, (float x));
490 # if !@HAVE_DECL_FLOORF@
492 _GL_FUNCDECL_SYS (floorf, float, (float x));
494 _GL_CXXALIAS_SYS (floorf, float, (float x));
496 _GL_CXXALIASWARN (floorf);
497 #elif defined GNULIB_POSIXCHECK
499 # if HAVE_RAW_DECL_FLOORF
500 _GL_WARN_ON_USE (floorf, "floorf is unportable - "
501 "use gnulib module floorf for portability");
507 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
508 # define floor rpl_floor
510 _GL_FUNCDECL_RPL (floor, double, (double x));
511 _GL_CXXALIAS_RPL (floor, double, (double x));
513 _GL_CXXALIAS_SYS (floor, double, (double x));
515 _GL_CXXALIASWARN (floor);
519 # if @REPLACE_FLOORL@
520 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
522 # define floorl rpl_floorl
524 _GL_FUNCDECL_RPL (floorl, long double, (long double x));
525 _GL_CXXALIAS_RPL (floorl, long double, (long double x));
527 # if !@HAVE_DECL_FLOORL@
529 _GL_FUNCDECL_SYS (floorl, long double, (long double x));
531 _GL_CXXALIAS_SYS (floorl, long double, (long double x));
533 _GL_CXXALIASWARN (floorl);
534 #elif defined GNULIB_POSIXCHECK
536 # if HAVE_RAW_DECL_FLOORL
537 _GL_WARN_ON_USE (floorl, "floorl is unportable - "
538 "use gnulib module floorl for portability");
545 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
547 # define fmaf rpl_fmaf
549 _GL_FUNCDECL_RPL (fmaf, float, (float x, float y, float z));
550 _GL_CXXALIAS_RPL (fmaf, float, (float x, float y, float z));
553 _GL_FUNCDECL_SYS (fmaf, float, (float x, float y, float z));
555 _GL_CXXALIAS_SYS (fmaf, float, (float x, float y, float z));
557 _GL_CXXALIASWARN (fmaf);
558 #elif defined GNULIB_POSIXCHECK
560 # if HAVE_RAW_DECL_FMAF
561 _GL_WARN_ON_USE (fmaf, "fmaf is unportable - "
562 "use gnulib module fmaf for portability");
568 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
572 _GL_FUNCDECL_RPL (fma, double, (double x, double y, double z));
573 _GL_CXXALIAS_RPL (fma, double, (double x, double y, double z));
576 _GL_FUNCDECL_SYS (fma, double, (double x, double y, double z));
578 _GL_CXXALIAS_SYS (fma, double, (double x, double y, double z));
580 _GL_CXXALIASWARN (fma);
581 #elif defined GNULIB_POSIXCHECK
583 # if HAVE_RAW_DECL_FMA
584 _GL_WARN_ON_USE (fma, "fma is unportable - "
585 "use gnulib module fma for portability");
591 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
593 # define fmal rpl_fmal
595 _GL_FUNCDECL_RPL (fmal, long double,
596 (long double x, long double y, long double z));
597 _GL_CXXALIAS_RPL (fmal, long double,
598 (long double x, long double y, long double z));
601 _GL_FUNCDECL_SYS (fmal, long double,
602 (long double x, long double y, long double z));
604 _GL_CXXALIAS_SYS (fmal, long double,
605 (long double x, long double y, long double z));
607 _GL_CXXALIASWARN (fmal);
608 #elif defined GNULIB_POSIXCHECK
610 # if HAVE_RAW_DECL_FMAL
611 _GL_WARN_ON_USE (fmal, "fmal is unportable - "
612 "use gnulib module fmal for portability");
620 _GL_FUNCDECL_SYS (fmodf, float, (float x, float y));
622 _GL_CXXALIAS_SYS (fmodf, float, (float x, float y));
623 _GL_CXXALIASWARN (fmodf);
624 #elif defined GNULIB_POSIXCHECK
626 # if HAVE_RAW_DECL_FMODF
627 _GL_WARN_ON_USE (fmodf, "fmodf is unportable - "
628 "use gnulib module fmodf for portability");
634 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
636 # define fmodl rpl_fmodl
638 _GL_FUNCDECL_RPL (fmodl, long double, (long double x, long double y));
639 _GL_CXXALIAS_RPL (fmodl, long double, (long double x, long double y));
643 _GL_FUNCDECL_SYS (fmodl, long double, (long double x, long double y));
645 _GL_CXXALIAS_SYS (fmodl, long double, (long double x, long double y));
647 _GL_CXXALIASWARN (fmodl);
648 #elif defined GNULIB_POSIXCHECK
650 # if HAVE_RAW_DECL_FMODL
651 _GL_WARN_ON_USE (fmodl, "fmodl is unportable - "
652 "use gnulib module fmodl for portability");
660 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
661 If x is zero: mantissa = x, exp = 0.
662 If x is infinite or NaN: mantissa = x, exp unspecified.
663 Store exp in *EXPPTR and return mantissa. */
665 # if @REPLACE_FREXPF@
666 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
668 # define frexpf rpl_frexpf
670 _GL_FUNCDECL_RPL (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
671 _GL_CXXALIAS_RPL (frexpf, float, (float x, int *expptr));
675 _GL_FUNCDECL_SYS (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
677 _GL_CXXALIAS_SYS (frexpf, float, (float x, int *expptr));
679 _GL_CXXALIASWARN (frexpf);
680 #elif defined GNULIB_POSIXCHECK
682 # if HAVE_RAW_DECL_FREXPF
683 _GL_WARN_ON_USE (frexpf, "frexpf is unportable - "
684 "use gnulib module frexpf for portability");
691 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
692 If x is zero: mantissa = x, exp = 0.
693 If x is infinite or NaN: mantissa = x, exp unspecified.
694 Store exp in *EXPPTR and return mantissa. */
697 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
698 # define frexp rpl_frexp
700 _GL_FUNCDECL_RPL (frexp, double, (double x, int *expptr) _GL_ARG_NONNULL ((2)));
701 _GL_CXXALIAS_RPL (frexp, double, (double x, int *expptr));
703 _GL_CXXALIAS_SYS (frexp, double, (double x, int *expptr));
705 _GL_CXXALIASWARN (frexp);
706 #elif defined GNULIB_POSIXCHECK
708 /* Assume frexp is always declared. */
709 _GL_WARN_ON_USE (frexp, "frexp is unportable - "
710 "use gnulib module frexp for portability");
716 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
717 If x is zero: mantissa = x, exp = 0.
718 If x is infinite or NaN: mantissa = x, exp unspecified.
719 Store exp in *EXPPTR and return mantissa. */
720 #if @GNULIB_FREXPL@ && @REPLACE_FREXPL@
721 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
723 # define frexpl rpl_frexpl
725 _GL_FUNCDECL_RPL (frexpl, long double,
726 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
727 _GL_CXXALIAS_RPL (frexpl, long double, (long double x, int *expptr));
729 # if !@HAVE_DECL_FREXPL@
730 _GL_FUNCDECL_SYS (frexpl, long double,
731 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
734 _GL_CXXALIAS_SYS (frexpl, long double, (long double x, int *expptr));
737 #if @GNULIB_FREXPL@ && !(@REPLACE_FREXPL@ && !@HAVE_DECL_FREXPL@)
738 _GL_CXXALIASWARN (frexpl);
740 #if !@GNULIB_FREXPL@ && defined GNULIB_POSIXCHECK
742 # if HAVE_RAW_DECL_FREXPL
743 _GL_WARN_ON_USE (frexpl, "frexpl is unportable - "
744 "use gnulib module frexpl for portability");
749 /* Return x * 2^exp. */
753 _GL_FUNCDECL_SYS (ldexpf, float, (float x, int exp));
755 _GL_CXXALIAS_SYS (ldexpf, float, (float x, int exp));
756 _GL_CXXALIASWARN (ldexpf);
757 #elif defined GNULIB_POSIXCHECK
759 # if HAVE_RAW_DECL_LDEXPF
760 _GL_WARN_ON_USE (ldexpf, "ldexpf is unportable - "
761 "use gnulib module ldexpf for portability");
765 /* Return x * 2^exp. */
766 #if @GNULIB_LDEXPL@ && @REPLACE_LDEXPL@
767 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
769 # define ldexpl rpl_ldexpl
771 _GL_FUNCDECL_RPL (ldexpl, long double, (long double x, int exp));
772 _GL_CXXALIAS_RPL (ldexpl, long double, (long double x, int exp));
774 # if !@HAVE_DECL_LDEXPL@
775 _GL_FUNCDECL_SYS (ldexpl, long double, (long double x, int exp));
778 _GL_CXXALIAS_SYS (ldexpl, long double, (long double x, int exp));
782 _GL_CXXALIASWARN (ldexpl);
784 #if !@GNULIB_LDEXPL@ && defined GNULIB_POSIXCHECK
786 # if HAVE_RAW_DECL_LDEXPL
787 _GL_WARN_ON_USE (ldexpl, "ldexpl is unportable - "
788 "use gnulib module ldexpl for portability");
794 # if !@HAVE_DECL_LOGB@
795 _GL_EXTERN_C double logb (double x);
797 #elif defined GNULIB_POSIXCHECK
799 # if HAVE_RAW_DECL_LOGB
800 _GL_WARN_ON_USE (logb, "logb is unportable - "
801 "use gnulib module logb for portability");
809 _GL_FUNCDECL_SYS (logf, float, (float x));
811 _GL_CXXALIAS_SYS (logf, float, (float x));
812 _GL_CXXALIASWARN (logf);
813 #elif defined GNULIB_POSIXCHECK
815 # if HAVE_RAW_DECL_LOGF
816 _GL_WARN_ON_USE (logf, "logf is unportable - "
817 "use gnulib module logf for portability");
822 # if !@HAVE_LOGL@ || !@HAVE_DECL_LOGL@
824 _GL_FUNCDECL_SYS (logl, long double, (long double x));
826 _GL_CXXALIAS_SYS (logl, long double, (long double x));
827 _GL_CXXALIASWARN (logl);
828 #elif defined GNULIB_POSIXCHECK
830 # if HAVE_RAW_DECL_LOGL
831 _GL_WARN_ON_USE (logl, "logl is unportable - "
832 "use gnulib module mathl for portability");
840 _GL_FUNCDECL_SYS (log10f, float, (float x));
842 _GL_CXXALIAS_SYS (log10f, float, (float x));
843 _GL_CXXALIASWARN (log10f);
844 #elif defined GNULIB_POSIXCHECK
846 # if HAVE_RAW_DECL_LOG10F
847 _GL_WARN_ON_USE (log10f, "log10f is unportable - "
848 "use gnulib module log10f for portability");
856 _GL_FUNCDECL_SYS (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
858 _GL_CXXALIAS_SYS (modff, float, (float x, float *iptr));
859 _GL_CXXALIASWARN (modff);
860 #elif defined GNULIB_POSIXCHECK
862 # if HAVE_RAW_DECL_MODFF
863 _GL_WARN_ON_USE (modff, "modff is unportable - "
864 "use gnulib module modff for portability");
871 _GL_FUNCDECL_SYS (modfl, long double, (long double x, long double *iptr)
872 _GL_ARG_NONNULL ((2)));
874 _GL_CXXALIAS_SYS (modfl, long double, (long double x, long double *iptr));
875 _GL_CXXALIASWARN (modfl);
876 #elif defined GNULIB_POSIXCHECK
878 # if HAVE_RAW_DECL_MODFL
879 _GL_WARN_ON_USE (modfl, "modfl is unportable - "
880 "use gnulib module modfl for portability");
888 _GL_FUNCDECL_SYS (powf, float, (float x, float y));
890 _GL_CXXALIAS_SYS (powf, float, (float x, float y));
891 _GL_CXXALIASWARN (powf);
892 #elif defined GNULIB_POSIXCHECK
894 # if HAVE_RAW_DECL_POWF
895 _GL_WARN_ON_USE (powf, "powf is unportable - "
896 "use gnulib module powf for portability");
901 #if @GNULIB_REMAINDERF@
902 # if !@HAVE_REMAINDERF@
903 _GL_FUNCDECL_SYS (remainderf, float, (float x, float y));
905 _GL_CXXALIAS_SYS (remainderf, float, (float x, float y));
906 _GL_CXXALIASWARN (remainderf);
907 #elif defined GNULIB_POSIXCHECK
909 # if HAVE_RAW_DECL_REMAINDERF
910 _GL_WARN_ON_USE (remainderf, "remainderf is unportable - "
911 "use gnulib module remainderf for portability");
915 #if @GNULIB_REMAINDER@
916 # if !@HAVE_REMAINDER@ || !@HAVE_DECL_REMAINDER@
917 _GL_FUNCDECL_SYS (remainder, double, (double x, double y));
919 _GL_CXXALIAS_SYS (remainder, double, (double x, double y));
920 _GL_CXXALIASWARN (remainder);
921 #elif defined GNULIB_POSIXCHECK
923 # if HAVE_RAW_DECL_REMAINDER
924 _GL_WARN_ON_USE (remainder, "remainder is unportable - "
925 "use gnulib module remainder for portability");
929 #if @GNULIB_REMAINDERL@
930 # if !@HAVE_REMAINDERL@
931 _GL_FUNCDECL_SYS (remainderl, long double, (long double x, long double y));
933 _GL_CXXALIAS_SYS (remainderl, long double, (long double x, long double y));
934 _GL_CXXALIASWARN (remainderl);
935 #elif defined GNULIB_POSIXCHECK
937 # if HAVE_RAW_DECL_REMAINDERL
938 _GL_WARN_ON_USE (remainderl, "remainderl is unportable - "
939 "use gnulib module remainderl for portability");
946 _GL_FUNCDECL_SYS (rintf, float, (float x));
948 _GL_CXXALIAS_SYS (rintf, float, (float x));
949 _GL_CXXALIASWARN (rintf);
950 #elif defined GNULIB_POSIXCHECK
952 # if HAVE_RAW_DECL_RINTF
953 _GL_WARN_ON_USE (rintf, "rintf is unportable - "
954 "use gnulib module rintf for portability");
960 _GL_FUNCDECL_SYS (rint, double, (double x));
962 _GL_CXXALIAS_SYS (rint, double, (double x));
963 _GL_CXXALIASWARN (rint);
964 #elif defined GNULIB_POSIXCHECK
966 # if HAVE_RAW_DECL_RINT
967 _GL_WARN_ON_USE (rint, "rint is unportable - "
968 "use gnulib module rint for portability");
974 _GL_FUNCDECL_SYS (rintl, long double, (long double x));
976 _GL_CXXALIAS_SYS (rintl, long double, (long double x));
977 _GL_CXXALIASWARN (rintl);
978 #elif defined GNULIB_POSIXCHECK
980 # if HAVE_RAW_DECL_RINTL
981 _GL_WARN_ON_USE (rintl, "rintl is unportable - "
982 "use gnulib module rintl for portability");
988 # if @REPLACE_ROUNDF@
989 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
991 # define roundf rpl_roundf
993 _GL_FUNCDECL_RPL (roundf, float, (float x));
994 _GL_CXXALIAS_RPL (roundf, float, (float x));
996 # if !@HAVE_DECL_ROUNDF@
997 _GL_FUNCDECL_SYS (roundf, float, (float x));
999 _GL_CXXALIAS_SYS (roundf, float, (float x));
1001 _GL_CXXALIASWARN (roundf);
1002 #elif defined GNULIB_POSIXCHECK
1004 # if HAVE_RAW_DECL_ROUNDF
1005 _GL_WARN_ON_USE (roundf, "roundf is unportable - "
1006 "use gnulib module roundf for portability");
1011 # if @REPLACE_ROUND@
1012 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1014 # define round rpl_round
1016 _GL_FUNCDECL_RPL (round, double, (double x));
1017 _GL_CXXALIAS_RPL (round, double, (double x));
1019 # if !@HAVE_DECL_ROUND@
1020 _GL_FUNCDECL_SYS (round, double, (double x));
1022 _GL_CXXALIAS_SYS (round, double, (double x));
1024 _GL_CXXALIASWARN (round);
1025 #elif defined GNULIB_POSIXCHECK
1027 # if HAVE_RAW_DECL_ROUND
1028 _GL_WARN_ON_USE (round, "round is unportable - "
1029 "use gnulib module round for portability");
1034 # if @REPLACE_ROUNDL@
1035 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1037 # define roundl rpl_roundl
1039 _GL_FUNCDECL_RPL (roundl, long double, (long double x));
1040 _GL_CXXALIAS_RPL (roundl, long double, (long double x));
1042 # if !@HAVE_DECL_ROUNDL@
1043 _GL_FUNCDECL_SYS (roundl, long double, (long double x));
1045 _GL_CXXALIAS_SYS (roundl, long double, (long double x));
1047 _GL_CXXALIASWARN (roundl);
1048 #elif defined GNULIB_POSIXCHECK
1050 # if HAVE_RAW_DECL_ROUNDL
1051 _GL_WARN_ON_USE (roundl, "roundl is unportable - "
1052 "use gnulib module roundl for portability");
1060 _GL_FUNCDECL_SYS (sinf, float, (float x));
1062 _GL_CXXALIAS_SYS (sinf, float, (float x));
1063 _GL_CXXALIASWARN (sinf);
1064 #elif defined GNULIB_POSIXCHECK
1066 # if HAVE_RAW_DECL_SINF
1067 _GL_WARN_ON_USE (sinf, "sinf is unportable - "
1068 "use gnulib module sinf for portability");
1073 # if !@HAVE_SINL@ || !@HAVE_DECL_SINL@
1075 _GL_FUNCDECL_SYS (sinl, long double, (long double x));
1077 _GL_CXXALIAS_SYS (sinl, long double, (long double x));
1078 _GL_CXXALIASWARN (sinl);
1079 #elif defined GNULIB_POSIXCHECK
1081 # if HAVE_RAW_DECL_SINL
1082 _GL_WARN_ON_USE (sinl, "sinl is unportable - "
1083 "use gnulib module mathl for portability");
1091 _GL_FUNCDECL_SYS (sinhf, float, (float x));
1093 _GL_CXXALIAS_SYS (sinhf, float, (float x));
1094 _GL_CXXALIASWARN (sinhf);
1095 #elif defined GNULIB_POSIXCHECK
1097 # if HAVE_RAW_DECL_SINHF
1098 _GL_WARN_ON_USE (sinhf, "sinhf is unportable - "
1099 "use gnulib module sinhf for portability");
1107 _GL_FUNCDECL_SYS (sqrtf, float, (float x));
1109 _GL_CXXALIAS_SYS (sqrtf, float, (float x));
1110 _GL_CXXALIASWARN (sqrtf);
1111 #elif defined GNULIB_POSIXCHECK
1113 # if HAVE_RAW_DECL_SQRTF
1114 _GL_WARN_ON_USE (sqrtf, "sqrtf is unportable - "
1115 "use gnulib module sqrtf for portability");
1120 # if !@HAVE_SQRTL@ || !@HAVE_DECL_SQRTL@
1122 _GL_FUNCDECL_SYS (sqrtl, long double, (long double x));
1124 _GL_CXXALIAS_SYS (sqrtl, long double, (long double x));
1125 _GL_CXXALIASWARN (sqrtl);
1126 #elif defined GNULIB_POSIXCHECK
1128 # if HAVE_RAW_DECL_SQRTL
1129 _GL_WARN_ON_USE (sqrtl, "sqrtl is unportable - "
1130 "use gnulib module mathl for portability");
1138 _GL_FUNCDECL_SYS (tanf, float, (float x));
1140 _GL_CXXALIAS_SYS (tanf, float, (float x));
1141 _GL_CXXALIASWARN (tanf);
1142 #elif defined GNULIB_POSIXCHECK
1144 # if HAVE_RAW_DECL_TANF
1145 _GL_WARN_ON_USE (tanf, "tanf is unportable - "
1146 "use gnulib module tanf for portability");
1151 # if !@HAVE_TANL@ || !@HAVE_DECL_TANL@
1153 _GL_FUNCDECL_SYS (tanl, long double, (long double x));
1155 _GL_CXXALIAS_SYS (tanl, long double, (long double x));
1156 _GL_CXXALIASWARN (tanl);
1157 #elif defined GNULIB_POSIXCHECK
1159 # if HAVE_RAW_DECL_TANL
1160 _GL_WARN_ON_USE (tanl, "tanl is unportable - "
1161 "use gnulib module mathl for portability");
1169 _GL_FUNCDECL_SYS (tanhf, float, (float x));
1171 _GL_CXXALIAS_SYS (tanhf, float, (float x));
1172 _GL_CXXALIASWARN (tanhf);
1173 #elif defined GNULIB_POSIXCHECK
1175 # if HAVE_RAW_DECL_TANHF
1176 _GL_WARN_ON_USE (tanhf, "tanhf is unportable - "
1177 "use gnulib module tanhf for portability");
1183 # if @REPLACE_TRUNCF@
1184 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1185 # define truncf rpl_truncf
1187 _GL_FUNCDECL_RPL (truncf, float, (float x));
1188 _GL_CXXALIAS_RPL (truncf, float, (float x));
1190 # if !@HAVE_DECL_TRUNCF@
1191 _GL_FUNCDECL_SYS (truncf, float, (float x));
1193 _GL_CXXALIAS_SYS (truncf, float, (float x));
1195 _GL_CXXALIASWARN (truncf);
1196 #elif defined GNULIB_POSIXCHECK
1198 # if HAVE_RAW_DECL_TRUNCF
1199 _GL_WARN_ON_USE (truncf, "truncf is unportable - "
1200 "use gnulib module truncf for portability");
1205 # if @REPLACE_TRUNC@
1206 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1207 # define trunc rpl_trunc
1209 _GL_FUNCDECL_RPL (trunc, double, (double x));
1210 _GL_CXXALIAS_RPL (trunc, double, (double x));
1212 # if !@HAVE_DECL_TRUNC@
1213 _GL_FUNCDECL_SYS (trunc, double, (double x));
1215 _GL_CXXALIAS_SYS (trunc, double, (double x));
1217 _GL_CXXALIASWARN (trunc);
1218 #elif defined GNULIB_POSIXCHECK
1220 # if HAVE_RAW_DECL_TRUNC
1221 _GL_WARN_ON_USE (trunc, "trunc is unportable - "
1222 "use gnulib module trunc for portability");
1227 # if @REPLACE_TRUNCL@
1228 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1230 # define truncl rpl_truncl
1232 _GL_FUNCDECL_RPL (truncl, long double, (long double x));
1233 _GL_CXXALIAS_RPL (truncl, long double, (long double x));
1235 # if !@HAVE_DECL_TRUNCL@
1236 _GL_FUNCDECL_SYS (truncl, long double, (long double x));
1238 _GL_CXXALIAS_SYS (truncl, long double, (long double x));
1240 _GL_CXXALIASWARN (truncl);
1241 #elif defined GNULIB_POSIXCHECK
1243 # if HAVE_RAW_DECL_TRUNCL
1244 _GL_WARN_ON_USE (truncl, "truncl is unportable - "
1245 "use gnulib module truncl for portability");
1250 /* Definitions of function-like macros come here, after the function
1254 #if @GNULIB_ISFINITE@
1255 # if @REPLACE_ISFINITE@
1256 _GL_EXTERN_C int gl_isfinitef (float x);
1257 _GL_EXTERN_C int gl_isfinited (double x);
1258 _GL_EXTERN_C int gl_isfinitel (long double x);
1260 # define isfinite(x) \
1261 (sizeof (x) == sizeof (long double) ? gl_isfinitel (x) : \
1262 sizeof (x) == sizeof (double) ? gl_isfinited (x) : \
1267 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isfinite)
1269 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isfinite)
1272 #elif defined GNULIB_POSIXCHECK
1273 # if defined isfinite
1274 _GL_WARN_REAL_FLOATING_DECL (isfinite);
1276 # define isfinite(x) _GL_WARN_REAL_FLOATING_IMPL (isfinite, x)
1282 # if @REPLACE_ISINF@
1283 _GL_EXTERN_C int gl_isinff (float x);
1284 _GL_EXTERN_C int gl_isinfd (double x);
1285 _GL_EXTERN_C int gl_isinfl (long double x);
1288 (sizeof (x) == sizeof (long double) ? gl_isinfl (x) : \
1289 sizeof (x) == sizeof (double) ? gl_isinfd (x) : \
1294 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isinf)
1296 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isinf)
1299 #elif defined GNULIB_POSIXCHECK
1301 _GL_WARN_REAL_FLOATING_DECL (isinf);
1303 # define isinf(x) _GL_WARN_REAL_FLOATING_IMPL (isinf, x)
1309 /* Test for NaN for 'float' numbers. */
1311 /* The original <math.h> included above provides a declaration of isnan macro
1312 or (older) isnanf function. */
1314 /* GCC 4.0 and newer provides three built-ins for isnan. */
1316 # define isnanf(x) __builtin_isnanf ((float)(x))
1317 # elif defined isnan
1319 # define isnanf(x) isnan ((float)(x))
1322 /* Test whether X is a NaN. */
1324 # define isnanf rpl_isnanf
1325 _GL_EXTERN_C int isnanf (float x);
1330 /* Test for NaN for 'double' numbers.
1331 This function is a gnulib extension, unlike isnan() which applied only
1332 to 'double' numbers earlier but now is a type-generic macro. */
1334 /* The original <math.h> included above provides a declaration of isnan
1337 /* GCC 4.0 and newer provides three built-ins for isnan. */
1339 # define isnand(x) __builtin_isnan ((double)(x))
1342 # define isnand(x) isnan ((double)(x))
1345 /* Test whether X is a NaN. */
1347 # define isnand rpl_isnand
1348 _GL_EXTERN_C int isnand (double x);
1353 /* Test for NaN for 'long double' numbers. */
1355 /* The original <math.h> included above provides a declaration of isnan
1356 macro or (older) isnanl function. */
1358 /* GCC 4.0 and newer provides three built-ins for isnan. */
1360 # define isnanl(x) __builtin_isnanl ((long double)(x))
1361 # elif defined isnan
1363 # define isnanl(x) isnan ((long double)(x))
1366 /* Test whether X is a NaN. */
1368 # define isnanl rpl_isnanl
1369 _GL_EXTERN_C int isnanl (long double x) _GL_ATTRIBUTE_CONST;
1373 /* This must come *after* the snippets for GNULIB_ISNANF and GNULIB_ISNANL! */
1375 # if @REPLACE_ISNAN@
1376 /* We can't just use the isnanf macro (e.g.) as exposed by
1377 isnanf.h (e.g.) here, because those may end up being macros
1378 that recursively expand back to isnan. So use the gnulib
1379 replacements for them directly. */
1380 # if @HAVE_ISNANF@ && __GNUC__ >= 4
1381 # define gl_isnan_f(x) __builtin_isnanf ((float)(x))
1383 _GL_EXTERN_C int rpl_isnanf (float x);
1384 # define gl_isnan_f(x) rpl_isnanf (x)
1386 # if @HAVE_ISNAND@ && __GNUC__ >= 4
1387 # define gl_isnan_d(x) __builtin_isnan ((double)(x))
1389 _GL_EXTERN_C int rpl_isnand (double x);
1390 # define gl_isnan_d(x) rpl_isnand (x)
1392 # if @HAVE_ISNANL@ && __GNUC__ >= 4
1393 # define gl_isnan_l(x) __builtin_isnanl ((long double)(x))
1395 _GL_EXTERN_C int rpl_isnanl (long double x) _GL_ATTRIBUTE_CONST;
1396 # define gl_isnan_l(x) rpl_isnanl (x)
1400 (sizeof (x) == sizeof (long double) ? gl_isnan_l (x) : \
1401 sizeof (x) == sizeof (double) ? gl_isnan_d (x) : \
1403 # elif __GNUC__ >= 4
1406 (sizeof (x) == sizeof (long double) ? __builtin_isnanl ((long double)(x)) : \
1407 sizeof (x) == sizeof (double) ? __builtin_isnan ((double)(x)) : \
1408 __builtin_isnanf ((float)(x)))
1412 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isnan)
1414 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isnan)
1417 /* Ensure isnan is a macro. */
1419 # define isnan isnan
1422 #elif defined GNULIB_POSIXCHECK
1424 _GL_WARN_REAL_FLOATING_DECL (isnan);
1426 # define isnan(x) _GL_WARN_REAL_FLOATING_IMPL (isnan, x)
1431 #if @GNULIB_SIGNBIT@
1432 # if @REPLACE_SIGNBIT_USING_GCC@
1434 /* GCC 4.0 and newer provides three built-ins for signbit. */
1435 # define signbit(x) \
1436 (sizeof (x) == sizeof (long double) ? __builtin_signbitl (x) : \
1437 sizeof (x) == sizeof (double) ? __builtin_signbit (x) : \
1438 __builtin_signbitf (x))
1440 # if @REPLACE_SIGNBIT@
1442 _GL_EXTERN_C int gl_signbitf (float arg);
1443 _GL_EXTERN_C int gl_signbitd (double arg);
1444 _GL_EXTERN_C int gl_signbitl (long double arg);
1445 # if __GNUC__ >= 2 && !defined __STRICT_ANSI__
1446 # define _GL_NUM_UINT_WORDS(type) \
1447 ((sizeof (type) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
1448 # if defined FLT_SIGNBIT_WORD && defined FLT_SIGNBIT_BIT && !defined gl_signbitf
1449 # define gl_signbitf_OPTIMIZED_MACRO
1450 # define gl_signbitf(arg) \
1451 ({ union { float _value; \
1452 unsigned int _word[_GL_NUM_UINT_WORDS (float)]; \
1454 _m._value = (arg); \
1455 (_m._word[FLT_SIGNBIT_WORD] >> FLT_SIGNBIT_BIT) & 1; \
1458 # if defined DBL_SIGNBIT_WORD && defined DBL_SIGNBIT_BIT && !defined gl_signbitd
1459 # define gl_signbitd_OPTIMIZED_MACRO
1460 # define gl_signbitd(arg) \
1461 ({ union { double _value; \
1462 unsigned int _word[_GL_NUM_UINT_WORDS (double)]; \
1464 _m._value = (arg); \
1465 (_m._word[DBL_SIGNBIT_WORD] >> DBL_SIGNBIT_BIT) & 1; \
1468 # if defined LDBL_SIGNBIT_WORD && defined LDBL_SIGNBIT_BIT && !defined gl_signbitl
1469 # define gl_signbitl_OPTIMIZED_MACRO
1470 # define gl_signbitl(arg) \
1471 ({ union { long double _value; \
1472 unsigned int _word[_GL_NUM_UINT_WORDS (long double)]; \
1474 _m._value = (arg); \
1475 (_m._word[LDBL_SIGNBIT_WORD] >> LDBL_SIGNBIT_BIT) & 1; \
1479 # define signbit(x) \
1480 (sizeof (x) == sizeof (long double) ? gl_signbitl (x) : \
1481 sizeof (x) == sizeof (double) ? gl_signbitd (x) : \
1486 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (signbit)
1488 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (signbit)
1491 #elif defined GNULIB_POSIXCHECK
1492 # if defined signbit
1493 _GL_WARN_REAL_FLOATING_DECL (signbit);
1495 # define signbit(x) _GL_WARN_REAL_FLOATING_IMPL (signbit, x)
1500 #endif /* _@GUARD_PREFIX@_MATH_H */
1501 #endif /* _@GUARD_PREFIX@_MATH_H */