1 /* A GNU-like <math.h>.
3 Copyright (C) 2002-2003, 2007-2011 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. */
38 /* Helper macros to define a portability warning for the
39 classification macro FUNC called with VALUE. POSIX declares the
40 classification macros with an argument of real-floating (that is,
41 one of float, double, or long double). */
42 #define _GL_WARN_REAL_FLOATING_DECL(func) \
44 rpl_ ## func ## f (float f) \
49 rpl_ ## func ## d (double d) \
54 rpl_ ## func ## l (long double l) \
58 _GL_WARN_ON_USE (rpl_ ## func ## f, #func " is unportable - " \
59 "use gnulib module " #func " for portability"); \
60 _GL_WARN_ON_USE (rpl_ ## func ## d, #func " is unportable - " \
61 "use gnulib module " #func " for portability"); \
62 _GL_WARN_ON_USE (rpl_ ## func ## l, #func " is unportable - " \
63 "use gnulib module " #func " for portability")
64 #define _GL_WARN_REAL_FLOATING_IMPL(func, value) \
65 (sizeof (value) == sizeof (float) ? rpl_ ## func ## f (value) \
66 : sizeof (value) == sizeof (double) ? rpl_ ## func ## d (value) \
67 : rpl_ ## func ## l (value))
71 /* Pull in a function that fixes the 'int' to 'long double' conversion
73 _GL_EXTERN_C void _Qp_itoq (long double *, int);
74 static void (*_gl_math_fix_itold) (long double *, int) = _Qp_itoq;
78 /* POSIX allows platforms that don't support NAN. But all major
79 machines in the past 15 years have supported something close to
80 IEEE NaN, so we define this unconditionally. We also must define
81 it on platforms like Solaris 10, where NAN is present but defined
82 as a function pointer rather than a floating point constant. */
83 #if !defined NAN || @REPLACE_NAN@
84 # if !GNULIB_defined_NAN
86 /* The Compaq (ex-DEC) C 6.4 compiler and the Microsoft MSVC 9 compiler
87 choke on the expression 0.0 / 0.0. */
88 # if defined __DECC || defined _MSC_VER
92 static float zero = 0.0f;
97 # define NAN (0.0f / 0.0f)
99 # define GNULIB_defined_NAN 1
103 /* Solaris 10 defines HUGE_VAL, but as a function pointer rather
104 than a floating point constant. */
105 #if @REPLACE_HUGE_VAL@
107 # define HUGE_VAL (1.0 / 0.0)
112 # if !@HAVE_ACOSL@ || !@HAVE_DECL_ACOSL@
113 _GL_FUNCDECL_SYS (acosl, long double, (long double x));
115 _GL_CXXALIAS_SYS (acosl, long double, (long double x));
116 _GL_CXXALIASWARN (acosl);
117 #elif defined GNULIB_POSIXCHECK
119 # if HAVE_RAW_DECL_ACOSL
120 _GL_WARN_ON_USE (acosl, "acosl is unportable - "
121 "use gnulib module mathl for portability");
127 # if !@HAVE_ASINL@ || !@HAVE_DECL_ASINL@
128 _GL_FUNCDECL_SYS (asinl, long double, (long double x));
130 _GL_CXXALIAS_SYS (asinl, long double, (long double x));
131 _GL_CXXALIASWARN (asinl);
132 #elif defined GNULIB_POSIXCHECK
134 # if HAVE_RAW_DECL_ASINL
135 _GL_WARN_ON_USE (asinl, "asinl is unportable - "
136 "use gnulib module mathl for portability");
142 # if !@HAVE_ATANL@ || !@HAVE_DECL_ATANL@
143 _GL_FUNCDECL_SYS (atanl, long double, (long double x));
145 _GL_CXXALIAS_SYS (atanl, long double, (long double x));
146 _GL_CXXALIASWARN (atanl);
147 #elif defined GNULIB_POSIXCHECK
149 # if HAVE_RAW_DECL_ATANL
150 _GL_WARN_ON_USE (atanl, "atanl is unportable - "
151 "use gnulib module mathl for portability");
158 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
160 # define ceilf rpl_ceilf
162 _GL_FUNCDECL_RPL (ceilf, float, (float x));
163 _GL_CXXALIAS_RPL (ceilf, float, (float x));
165 # if !@HAVE_DECL_CEILF@
166 _GL_FUNCDECL_SYS (ceilf, float, (float x));
168 _GL_CXXALIAS_SYS (ceilf, float, (float x));
170 _GL_CXXALIASWARN (ceilf);
171 #elif defined GNULIB_POSIXCHECK
173 # if HAVE_RAW_DECL_CEILF
174 _GL_WARN_ON_USE (ceilf, "ceilf is unportable - "
175 "use gnulib module ceilf for portability");
181 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
182 # define ceil rpl_ceil
184 _GL_FUNCDECL_RPL (ceil, double, (double x));
185 _GL_CXXALIAS_RPL (ceil, double, (double x));
187 _GL_CXXALIAS_SYS (ceil, double, (double x));
189 _GL_CXXALIASWARN (ceil);
194 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
196 # define ceill rpl_ceill
198 _GL_FUNCDECL_RPL (ceill, long double, (long double x));
199 _GL_CXXALIAS_RPL (ceill, long double, (long double x));
201 # if !@HAVE_DECL_CEILL@
202 _GL_FUNCDECL_SYS (ceill, long double, (long double x));
204 _GL_CXXALIAS_SYS (ceill, long double, (long double x));
206 _GL_CXXALIASWARN (ceill);
207 #elif defined GNULIB_POSIXCHECK
209 # if HAVE_RAW_DECL_CEILL
210 _GL_WARN_ON_USE (ceill, "ceill is unportable - "
211 "use gnulib module ceill for portability");
217 # if !@HAVE_COSL@ || !@HAVE_DECL_COSL@
218 _GL_FUNCDECL_SYS (cosl, long double, (long double x));
220 _GL_CXXALIAS_SYS (cosl, long double, (long double x));
221 _GL_CXXALIASWARN (cosl);
222 #elif defined GNULIB_POSIXCHECK
224 # if HAVE_RAW_DECL_COSL
225 _GL_WARN_ON_USE (cosl, "cosl is unportable - "
226 "use gnulib module mathl for portability");
234 _GL_FUNCDECL_SYS (expf, float, (float x));
236 _GL_CXXALIAS_SYS (expf, float, (float x));
237 _GL_CXXALIASWARN (expf);
238 #elif defined GNULIB_POSIXCHECK
240 # if HAVE_RAW_DECL_EXPF
241 _GL_WARN_ON_USE (expf, "expf is unportable - "
242 "use gnulib module expf for portability");
247 # if !@HAVE_EXPL@ || !@HAVE_DECL_EXPL@
248 _GL_FUNCDECL_SYS (expl, long double, (long double x));
250 _GL_CXXALIAS_SYS (expl, long double, (long double x));
251 _GL_CXXALIASWARN (expl);
252 #elif defined GNULIB_POSIXCHECK
254 # if HAVE_RAW_DECL_EXPL
255 _GL_WARN_ON_USE (expl, "expl is unportable - "
256 "use gnulib module mathl for portability");
264 _GL_FUNCDECL_SYS (fabsf, float, (float x));
266 _GL_CXXALIAS_SYS (fabsf, float, (float x));
267 _GL_CXXALIASWARN (fabsf);
268 #elif defined GNULIB_POSIXCHECK
270 # if HAVE_RAW_DECL_FABSF
271 _GL_WARN_ON_USE (fabsf, "fabsf is unportable - "
272 "use gnulib module fabsf for portability");
278 # if @REPLACE_FLOORF@
279 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
281 # define floorf rpl_floorf
283 _GL_FUNCDECL_RPL (floorf, float, (float x));
284 _GL_CXXALIAS_RPL (floorf, float, (float x));
286 # if !@HAVE_DECL_FLOORF@
287 _GL_FUNCDECL_SYS (floorf, float, (float x));
289 _GL_CXXALIAS_SYS (floorf, float, (float x));
291 _GL_CXXALIASWARN (floorf);
292 #elif defined GNULIB_POSIXCHECK
294 # if HAVE_RAW_DECL_FLOORF
295 _GL_WARN_ON_USE (floorf, "floorf is unportable - "
296 "use gnulib module floorf for portability");
302 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
303 # define floor rpl_floor
305 _GL_FUNCDECL_RPL (floor, double, (double x));
306 _GL_CXXALIAS_RPL (floor, double, (double x));
308 _GL_CXXALIAS_SYS (floor, double, (double x));
310 _GL_CXXALIASWARN (floor);
314 # if @REPLACE_FLOORL@
315 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
317 # define floorl rpl_floorl
319 _GL_FUNCDECL_RPL (floorl, long double, (long double x));
320 _GL_CXXALIAS_RPL (floorl, long double, (long double x));
322 # if !@HAVE_DECL_FLOORL@
323 _GL_FUNCDECL_SYS (floorl, long double, (long double x));
325 _GL_CXXALIAS_SYS (floorl, long double, (long double x));
327 _GL_CXXALIASWARN (floorl);
328 #elif defined GNULIB_POSIXCHECK
330 # if HAVE_RAW_DECL_FLOORL
331 _GL_WARN_ON_USE (floorl, "floorl is unportable - "
332 "use gnulib module floorl for portability");
340 _GL_FUNCDECL_SYS (fmodf, float, (float x, float y));
342 _GL_CXXALIAS_SYS (fmodf, float, (float x, float y));
343 _GL_CXXALIASWARN (fmodf);
344 #elif defined GNULIB_POSIXCHECK
346 # if HAVE_RAW_DECL_FMODF
347 _GL_WARN_ON_USE (fmodf, "fmodf is unportable - "
348 "use gnulib module fmodf for portability");
356 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
357 If x is zero: mantissa = x, exp = 0.
358 If x is infinite or NaN: mantissa = x, exp unspecified.
359 Store exp in *EXPPTR and return mantissa. */
361 # if @REPLACE_FREXPF@
362 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
364 # define frexpf rpl_frexpf
366 _GL_FUNCDECL_RPL (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
367 _GL_CXXALIAS_RPL (frexpf, float, (float x, int *expptr));
371 _GL_FUNCDECL_SYS (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
373 _GL_CXXALIAS_SYS (frexpf, float, (float x, int *expptr));
375 _GL_CXXALIASWARN (frexpf);
376 #elif defined GNULIB_POSIXCHECK
378 # if HAVE_RAW_DECL_FREXPF
379 _GL_WARN_ON_USE (frexpf, "frexpf is unportable - "
380 "use gnulib module frexpf for portability");
387 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
388 If x is zero: mantissa = x, exp = 0.
389 If x is infinite or NaN: mantissa = x, exp unspecified.
390 Store exp in *EXPPTR and return mantissa. */
393 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
394 # define frexp rpl_frexp
396 _GL_FUNCDECL_RPL (frexp, double, (double x, int *expptr) _GL_ARG_NONNULL ((2)));
397 _GL_CXXALIAS_RPL (frexp, double, (double x, int *expptr));
399 _GL_CXXALIAS_SYS (frexp, double, (double x, int *expptr));
401 _GL_CXXALIASWARN (frexp);
402 #elif defined GNULIB_POSIXCHECK
404 /* Assume frexp is always declared. */
405 _GL_WARN_ON_USE (frexp, "frexp is unportable - "
406 "use gnulib module frexp for portability");
412 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
413 If x is zero: mantissa = x, exp = 0.
414 If x is infinite or NaN: mantissa = x, exp unspecified.
415 Store exp in *EXPPTR and return mantissa. */
416 #if @GNULIB_FREXPL@ && @REPLACE_FREXPL@
417 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
419 # define frexpl rpl_frexpl
421 _GL_FUNCDECL_RPL (frexpl, long double,
422 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
423 _GL_CXXALIAS_RPL (frexpl, long double, (long double x, int *expptr));
425 # if !@HAVE_DECL_FREXPL@
426 _GL_FUNCDECL_SYS (frexpl, long double,
427 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
430 _GL_CXXALIAS_SYS (frexpl, long double, (long double x, int *expptr));
433 #if @GNULIB_FREXPL@ && !(@REPLACE_FREXPL@ && !@HAVE_DECL_FREXPL@)
434 _GL_CXXALIASWARN (frexpl);
436 #if !@GNULIB_FREXPL@ && defined GNULIB_POSIXCHECK
438 # if HAVE_RAW_DECL_FREXPL
439 _GL_WARN_ON_USE (frexpl, "frexpl is unportable - "
440 "use gnulib module frexpl for portability");
445 /* Return x * 2^exp. */
449 _GL_FUNCDECL_SYS (ldexpf, float, (float x, int exp));
451 _GL_CXXALIAS_SYS (ldexpf, float, (float x, int exp));
452 _GL_CXXALIASWARN (ldexpf);
453 #elif defined GNULIB_POSIXCHECK
455 # if HAVE_RAW_DECL_LDEXPF
456 _GL_WARN_ON_USE (ldexpf, "ldexpf is unportable - "
457 "use gnulib module ldexpf for portability");
461 /* Return x * 2^exp. */
462 #if @GNULIB_LDEXPL@ && @REPLACE_LDEXPL@
463 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
465 # define ldexpl rpl_ldexpl
467 _GL_FUNCDECL_RPL (ldexpl, long double, (long double x, int exp));
468 _GL_CXXALIAS_RPL (ldexpl, long double, (long double x, int exp));
470 # if !@HAVE_DECL_LDEXPL@
471 _GL_FUNCDECL_SYS (ldexpl, long double, (long double x, int exp));
474 _GL_CXXALIAS_SYS (ldexpl, long double, (long double x, int exp));
478 _GL_CXXALIASWARN (ldexpl);
480 #if !@GNULIB_LDEXPL@ && defined GNULIB_POSIXCHECK
482 # if HAVE_RAW_DECL_LDEXPL
483 _GL_WARN_ON_USE (ldexpl, "ldexpl is unportable - "
484 "use gnulib module ldexpl for portability");
490 # if !@HAVE_DECL_LOGB@
491 _GL_EXTERN_C double logb (double x);
493 #elif defined GNULIB_POSIXCHECK
495 # if HAVE_RAW_DECL_LOGB
496 _GL_WARN_ON_USE (logb, "logb is unportable - "
497 "use gnulib module logb for portability");
505 _GL_FUNCDECL_SYS (logf, float, (float x));
507 _GL_CXXALIAS_SYS (logf, float, (float x));
508 _GL_CXXALIASWARN (logf);
509 #elif defined GNULIB_POSIXCHECK
511 # if HAVE_RAW_DECL_LOGF
512 _GL_WARN_ON_USE (logf, "logf is unportable - "
513 "use gnulib module logf for portability");
518 # if !@HAVE_LOGL@ || !@HAVE_DECL_LOGL@
519 _GL_FUNCDECL_SYS (logl, long double, (long double x));
521 _GL_CXXALIAS_SYS (logl, long double, (long double x));
522 _GL_CXXALIASWARN (logl);
523 #elif defined GNULIB_POSIXCHECK
525 # if HAVE_RAW_DECL_LOGL
526 _GL_WARN_ON_USE (logl, "logl is unportable - "
527 "use gnulib module mathl for portability");
535 _GL_FUNCDECL_SYS (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
537 _GL_CXXALIAS_SYS (modff, float, (float x, float *iptr));
538 _GL_CXXALIASWARN (modff);
539 #elif defined GNULIB_POSIXCHECK
541 # if HAVE_RAW_DECL_MODFF
542 _GL_WARN_ON_USE (modff, "modff is unportable - "
543 "use gnulib module modff for portability");
549 # if @REPLACE_ROUNDF@
550 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
552 # define roundf rpl_roundf
554 _GL_FUNCDECL_RPL (roundf, float, (float x));
555 _GL_CXXALIAS_RPL (roundf, float, (float x));
557 # if !@HAVE_DECL_ROUNDF@
558 _GL_FUNCDECL_SYS (roundf, float, (float x));
560 _GL_CXXALIAS_SYS (roundf, float, (float x));
562 _GL_CXXALIASWARN (roundf);
563 #elif defined GNULIB_POSIXCHECK
565 # if HAVE_RAW_DECL_ROUNDF
566 _GL_WARN_ON_USE (roundf, "roundf is unportable - "
567 "use gnulib module roundf for portability");
573 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
575 # define round rpl_round
577 _GL_FUNCDECL_RPL (round, double, (double x));
578 _GL_CXXALIAS_RPL (round, double, (double x));
580 # if !@HAVE_DECL_ROUND@
581 _GL_FUNCDECL_SYS (round, double, (double x));
583 _GL_CXXALIAS_SYS (round, double, (double x));
585 _GL_CXXALIASWARN (round);
586 #elif defined GNULIB_POSIXCHECK
588 # if HAVE_RAW_DECL_ROUND
589 _GL_WARN_ON_USE (round, "round is unportable - "
590 "use gnulib module round for portability");
595 # if @REPLACE_ROUNDL@
596 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
598 # define roundl rpl_roundl
600 _GL_FUNCDECL_RPL (roundl, long double, (long double x));
601 _GL_CXXALIAS_RPL (roundl, long double, (long double x));
603 # if !@HAVE_DECL_ROUNDL@
604 _GL_FUNCDECL_SYS (roundl, long double, (long double x));
606 _GL_CXXALIAS_SYS (roundl, long double, (long double x));
608 _GL_CXXALIASWARN (roundl);
609 #elif defined GNULIB_POSIXCHECK
611 # if HAVE_RAW_DECL_ROUNDL
612 _GL_WARN_ON_USE (roundl, "roundl is unportable - "
613 "use gnulib module roundl for portability");
619 # if !@HAVE_SINL@ || !@HAVE_DECL_SINL@
620 _GL_FUNCDECL_SYS (sinl, long double, (long double x));
622 _GL_CXXALIAS_SYS (sinl, long double, (long double x));
623 _GL_CXXALIASWARN (sinl);
624 #elif defined GNULIB_POSIXCHECK
626 # if HAVE_RAW_DECL_SINL
627 _GL_WARN_ON_USE (sinl, "sinl is unportable - "
628 "use gnulib module mathl for portability");
636 _GL_FUNCDECL_SYS (sqrtf, float, (float x));
638 _GL_CXXALIAS_SYS (sqrtf, float, (float x));
639 _GL_CXXALIASWARN (sqrtf);
640 #elif defined GNULIB_POSIXCHECK
642 # if HAVE_RAW_DECL_SQRTF
643 _GL_WARN_ON_USE (sqrtf, "sqrtf is unportable - "
644 "use gnulib module sqrtf for portability");
649 # if !@HAVE_SQRTL@ || !@HAVE_DECL_SQRTL@
650 _GL_FUNCDECL_SYS (sqrtl, long double, (long double x));
652 _GL_CXXALIAS_SYS (sqrtl, long double, (long double x));
653 _GL_CXXALIASWARN (sqrtl);
654 #elif defined GNULIB_POSIXCHECK
656 # if HAVE_RAW_DECL_SQRTL
657 _GL_WARN_ON_USE (sqrtl, "sqrtl is unportable - "
658 "use gnulib module mathl for portability");
664 # if !@HAVE_TANL@ || !@HAVE_DECL_TANL@
665 _GL_FUNCDECL_SYS (tanl, long double, (long double x));
667 _GL_CXXALIAS_SYS (tanl, long double, (long double x));
668 _GL_CXXALIASWARN (tanl);
669 #elif defined GNULIB_POSIXCHECK
671 # if HAVE_RAW_DECL_TANL
672 _GL_WARN_ON_USE (tanl, "tanl is unportable - "
673 "use gnulib module mathl for portability");
679 # if @REPLACE_TRUNCF@
680 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
681 # define truncf rpl_truncf
683 _GL_FUNCDECL_RPL (truncf, float, (float x));
684 _GL_CXXALIAS_RPL (truncf, float, (float x));
686 # if !@HAVE_DECL_TRUNCF@
687 _GL_FUNCDECL_SYS (truncf, float, (float x));
689 _GL_CXXALIAS_SYS (truncf, float, (float x));
691 _GL_CXXALIASWARN (truncf);
692 #elif defined GNULIB_POSIXCHECK
694 # if HAVE_RAW_DECL_TRUNCF
695 _GL_WARN_ON_USE (truncf, "truncf is unportable - "
696 "use gnulib module truncf for portability");
702 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
703 # define trunc rpl_trunc
705 _GL_FUNCDECL_RPL (trunc, double, (double x));
706 _GL_CXXALIAS_RPL (trunc, double, (double x));
708 # if !@HAVE_DECL_TRUNC@
709 _GL_FUNCDECL_SYS (trunc, double, (double x));
711 _GL_CXXALIAS_SYS (trunc, double, (double x));
713 _GL_CXXALIASWARN (trunc);
714 #elif defined GNULIB_POSIXCHECK
716 # if HAVE_RAW_DECL_TRUNC
717 _GL_WARN_ON_USE (trunc, "trunc is unportable - "
718 "use gnulib module trunc for portability");
723 # if @REPLACE_TRUNCL@
724 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
726 # define truncl rpl_truncl
728 _GL_FUNCDECL_RPL (truncl, long double, (long double x));
729 _GL_CXXALIAS_RPL (truncl, long double, (long double x));
731 # if !@HAVE_DECL_TRUNCL@
732 _GL_FUNCDECL_SYS (truncl, long double, (long double x));
734 _GL_CXXALIAS_SYS (truncl, long double, (long double x));
736 _GL_CXXALIASWARN (truncl);
737 #elif defined GNULIB_POSIXCHECK
739 # if HAVE_RAW_DECL_TRUNCL
740 _GL_WARN_ON_USE (truncl, "truncl is unportable - "
741 "use gnulib module truncl for portability");
746 /* Definitions of function-like macros come here, after the function
750 #if @GNULIB_ISFINITE@
751 # if @REPLACE_ISFINITE@
752 _GL_EXTERN_C int gl_isfinitef (float x);
753 _GL_EXTERN_C int gl_isfinited (double x);
754 _GL_EXTERN_C int gl_isfinitel (long double x);
756 # define isfinite(x) \
757 (sizeof (x) == sizeof (long double) ? gl_isfinitel (x) : \
758 sizeof (x) == sizeof (double) ? gl_isfinited (x) : \
761 #elif defined GNULIB_POSIXCHECK
762 # if defined isfinite
763 _GL_WARN_REAL_FLOATING_DECL (isfinite);
765 # define isfinite(x) _GL_WARN_REAL_FLOATING_IMPL (isfinite, x)
772 _GL_EXTERN_C int gl_isinff (float x);
773 _GL_EXTERN_C int gl_isinfd (double x);
774 _GL_EXTERN_C int gl_isinfl (long double x);
777 (sizeof (x) == sizeof (long double) ? gl_isinfl (x) : \
778 sizeof (x) == sizeof (double) ? gl_isinfd (x) : \
781 #elif defined GNULIB_POSIXCHECK
783 _GL_WARN_REAL_FLOATING_DECL (isinf);
785 # define isinf(x) _GL_WARN_REAL_FLOATING_IMPL (isinf, x)
791 /* Test for NaN for 'float' numbers. */
793 /* The original <math.h> included above provides a declaration of isnan macro
794 or (older) isnanf function. */
796 /* GCC 4.0 and newer provides three built-ins for isnan. */
798 # define isnanf(x) __builtin_isnanf ((float)(x))
801 # define isnanf(x) isnan ((float)(x))
804 /* Test whether X is a NaN. */
806 # define isnanf rpl_isnanf
807 _GL_EXTERN_C int isnanf (float x);
812 /* Test for NaN for 'double' numbers.
813 This function is a gnulib extension, unlike isnan() which applied only
814 to 'double' numbers earlier but now is a type-generic macro. */
816 /* The original <math.h> included above provides a declaration of isnan
819 /* GCC 4.0 and newer provides three built-ins for isnan. */
821 # define isnand(x) __builtin_isnan ((double)(x))
824 # define isnand(x) isnan ((double)(x))
827 /* Test whether X is a NaN. */
829 # define isnand rpl_isnand
830 _GL_EXTERN_C int isnand (double x);
835 /* Test for NaN for 'long double' numbers. */
837 /* The original <math.h> included above provides a declaration of isnan
838 macro or (older) isnanl function. */
840 /* GCC 4.0 and newer provides three built-ins for isnan. */
842 # define isnanl(x) __builtin_isnanl ((long double)(x))
845 # define isnanl(x) isnan ((long double)(x))
848 /* Test whether X is a NaN. */
850 # define isnanl rpl_isnanl
851 _GL_EXTERN_C int isnanl (long double x);
855 /* This must come *after* the snippets for GNULIB_ISNANF and GNULIB_ISNANL! */
858 /* We can't just use the isnanf macro (e.g.) as exposed by
859 isnanf.h (e.g.) here, because those may end up being macros
860 that recursively expand back to isnan. So use the gnulib
861 replacements for them directly. */
862 # if @HAVE_ISNANF@ && __GNUC__ >= 4
863 # define gl_isnan_f(x) __builtin_isnanf ((float)(x))
865 _GL_EXTERN_C int rpl_isnanf (float x);
866 # define gl_isnan_f(x) rpl_isnanf (x)
868 # if @HAVE_ISNAND@ && __GNUC__ >= 4
869 # define gl_isnan_d(x) __builtin_isnan ((double)(x))
871 _GL_EXTERN_C int rpl_isnand (double x);
872 # define gl_isnan_d(x) rpl_isnand (x)
874 # if @HAVE_ISNANL@ && __GNUC__ >= 4
875 # define gl_isnan_l(x) __builtin_isnanl ((long double)(x))
877 _GL_EXTERN_C int rpl_isnanl (long double x);
878 # define gl_isnan_l(x) rpl_isnanl (x)
882 (sizeof (x) == sizeof (long double) ? gl_isnan_l (x) : \
883 sizeof (x) == sizeof (double) ? gl_isnan_d (x) : \
888 (sizeof (x) == sizeof (long double) ? __builtin_isnanl ((long double)(x)) : \
889 sizeof (x) == sizeof (double) ? __builtin_isnan ((double)(x)) : \
890 __builtin_isnanf ((float)(x)))
892 /* Ensure isnan is a macro. */
896 #elif defined GNULIB_POSIXCHECK
898 _GL_WARN_REAL_FLOATING_DECL (isnan);
900 # define isnan(x) _GL_WARN_REAL_FLOATING_IMPL (isnan, x)
906 # if @REPLACE_SIGNBIT_USING_GCC@
908 /* GCC 4.0 and newer provides three built-ins for signbit. */
909 # define signbit(x) \
910 (sizeof (x) == sizeof (long double) ? __builtin_signbitl (x) : \
911 sizeof (x) == sizeof (double) ? __builtin_signbit (x) : \
912 __builtin_signbitf (x))
914 # if @REPLACE_SIGNBIT@
916 _GL_EXTERN_C int gl_signbitf (float arg);
917 _GL_EXTERN_C int gl_signbitd (double arg);
918 _GL_EXTERN_C int gl_signbitl (long double arg);
919 # if __GNUC__ >= 2 && !__STRICT_ANSI__
920 # define _GL_NUM_UINT_WORDS(type) \
921 ((sizeof (type) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
922 # if defined FLT_SIGNBIT_WORD && defined FLT_SIGNBIT_BIT && !defined gl_signbitf
923 # define gl_signbitf_OPTIMIZED_MACRO
924 # define gl_signbitf(arg) \
925 ({ union { float _value; \
926 unsigned int _word[_GL_NUM_UINT_WORDS (float)]; \
929 (_m._word[FLT_SIGNBIT_WORD] >> FLT_SIGNBIT_BIT) & 1; \
932 # if defined DBL_SIGNBIT_WORD && defined DBL_SIGNBIT_BIT && !defined gl_signbitd
933 # define gl_signbitd_OPTIMIZED_MACRO
934 # define gl_signbitd(arg) \
935 ({ union { double _value; \
936 unsigned int _word[_GL_NUM_UINT_WORDS (double)]; \
939 (_m._word[DBL_SIGNBIT_WORD] >> DBL_SIGNBIT_BIT) & 1; \
942 # if defined LDBL_SIGNBIT_WORD && defined LDBL_SIGNBIT_BIT && !defined gl_signbitl
943 # define gl_signbitl_OPTIMIZED_MACRO
944 # define gl_signbitl(arg) \
945 ({ union { long double _value; \
946 unsigned int _word[_GL_NUM_UINT_WORDS (long double)]; \
949 (_m._word[LDBL_SIGNBIT_WORD] >> LDBL_SIGNBIT_BIT) & 1; \
953 # define signbit(x) \
954 (sizeof (x) == sizeof (long double) ? gl_signbitl (x) : \
955 sizeof (x) == sizeof (double) ? gl_signbitd (x) : \
958 #elif defined GNULIB_POSIXCHECK
960 _GL_WARN_REAL_FLOATING_DECL (signbit);
962 # define signbit(x) _GL_WARN_REAL_FLOATING_IMPL (signbit, x)
967 #endif /* _@GUARD_PREFIX@_MATH_H */
968 #endif /* _@GUARD_PREFIX@_MATH_H */