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");
129 _GL_FUNCDECL_SYS (asinf, float, (float x));
131 _GL_CXXALIAS_SYS (asinf, float, (float x));
132 _GL_CXXALIASWARN (asinf);
133 #elif defined GNULIB_POSIXCHECK
135 # if HAVE_RAW_DECL_ASINF
136 _GL_WARN_ON_USE (asinf, "asinf is unportable - "
137 "use gnulib module asinf for portability");
142 # if !@HAVE_ASINL@ || !@HAVE_DECL_ASINL@
143 _GL_FUNCDECL_SYS (asinl, long double, (long double x));
145 _GL_CXXALIAS_SYS (asinl, long double, (long double x));
146 _GL_CXXALIASWARN (asinl);
147 #elif defined GNULIB_POSIXCHECK
149 # if HAVE_RAW_DECL_ASINL
150 _GL_WARN_ON_USE (asinl, "asinl is unportable - "
151 "use gnulib module mathl for portability");
157 # if !@HAVE_ATANL@ || !@HAVE_DECL_ATANL@
158 _GL_FUNCDECL_SYS (atanl, long double, (long double x));
160 _GL_CXXALIAS_SYS (atanl, long double, (long double x));
161 _GL_CXXALIASWARN (atanl);
162 #elif defined GNULIB_POSIXCHECK
164 # if HAVE_RAW_DECL_ATANL
165 _GL_WARN_ON_USE (atanl, "atanl is unportable - "
166 "use gnulib module mathl for portability");
173 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
175 # define ceilf rpl_ceilf
177 _GL_FUNCDECL_RPL (ceilf, float, (float x));
178 _GL_CXXALIAS_RPL (ceilf, float, (float x));
180 # if !@HAVE_DECL_CEILF@
181 _GL_FUNCDECL_SYS (ceilf, float, (float x));
183 _GL_CXXALIAS_SYS (ceilf, float, (float x));
185 _GL_CXXALIASWARN (ceilf);
186 #elif defined GNULIB_POSIXCHECK
188 # if HAVE_RAW_DECL_CEILF
189 _GL_WARN_ON_USE (ceilf, "ceilf is unportable - "
190 "use gnulib module ceilf for portability");
196 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
197 # define ceil rpl_ceil
199 _GL_FUNCDECL_RPL (ceil, double, (double x));
200 _GL_CXXALIAS_RPL (ceil, double, (double x));
202 _GL_CXXALIAS_SYS (ceil, double, (double x));
204 _GL_CXXALIASWARN (ceil);
209 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
211 # define ceill rpl_ceill
213 _GL_FUNCDECL_RPL (ceill, long double, (long double x));
214 _GL_CXXALIAS_RPL (ceill, long double, (long double x));
216 # if !@HAVE_DECL_CEILL@
217 _GL_FUNCDECL_SYS (ceill, long double, (long double x));
219 _GL_CXXALIAS_SYS (ceill, long double, (long double x));
221 _GL_CXXALIASWARN (ceill);
222 #elif defined GNULIB_POSIXCHECK
224 # if HAVE_RAW_DECL_CEILL
225 _GL_WARN_ON_USE (ceill, "ceill is unportable - "
226 "use gnulib module ceill for portability");
234 _GL_FUNCDECL_SYS (cosf, float, (float x));
236 _GL_CXXALIAS_SYS (cosf, float, (float x));
237 _GL_CXXALIASWARN (cosf);
238 #elif defined GNULIB_POSIXCHECK
240 # if HAVE_RAW_DECL_COSF
241 _GL_WARN_ON_USE (cosf, "cosf is unportable - "
242 "use gnulib module cosf for portability");
247 # if !@HAVE_COSL@ || !@HAVE_DECL_COSL@
248 _GL_FUNCDECL_SYS (cosl, long double, (long double x));
250 _GL_CXXALIAS_SYS (cosl, long double, (long double x));
251 _GL_CXXALIASWARN (cosl);
252 #elif defined GNULIB_POSIXCHECK
254 # if HAVE_RAW_DECL_COSL
255 _GL_WARN_ON_USE (cosl, "cosl is unportable - "
256 "use gnulib module mathl for portability");
264 _GL_FUNCDECL_SYS (expf, float, (float x));
266 _GL_CXXALIAS_SYS (expf, float, (float x));
267 _GL_CXXALIASWARN (expf);
268 #elif defined GNULIB_POSIXCHECK
270 # if HAVE_RAW_DECL_EXPF
271 _GL_WARN_ON_USE (expf, "expf is unportable - "
272 "use gnulib module expf for portability");
277 # if !@HAVE_EXPL@ || !@HAVE_DECL_EXPL@
278 _GL_FUNCDECL_SYS (expl, long double, (long double x));
280 _GL_CXXALIAS_SYS (expl, long double, (long double x));
281 _GL_CXXALIASWARN (expl);
282 #elif defined GNULIB_POSIXCHECK
284 # if HAVE_RAW_DECL_EXPL
285 _GL_WARN_ON_USE (expl, "expl is unportable - "
286 "use gnulib module mathl for portability");
294 _GL_FUNCDECL_SYS (fabsf, float, (float x));
296 _GL_CXXALIAS_SYS (fabsf, float, (float x));
297 _GL_CXXALIASWARN (fabsf);
298 #elif defined GNULIB_POSIXCHECK
300 # if HAVE_RAW_DECL_FABSF
301 _GL_WARN_ON_USE (fabsf, "fabsf is unportable - "
302 "use gnulib module fabsf for portability");
308 # if @REPLACE_FLOORF@
309 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
311 # define floorf rpl_floorf
313 _GL_FUNCDECL_RPL (floorf, float, (float x));
314 _GL_CXXALIAS_RPL (floorf, float, (float x));
316 # if !@HAVE_DECL_FLOORF@
317 _GL_FUNCDECL_SYS (floorf, float, (float x));
319 _GL_CXXALIAS_SYS (floorf, float, (float x));
321 _GL_CXXALIASWARN (floorf);
322 #elif defined GNULIB_POSIXCHECK
324 # if HAVE_RAW_DECL_FLOORF
325 _GL_WARN_ON_USE (floorf, "floorf is unportable - "
326 "use gnulib module floorf for portability");
332 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
333 # define floor rpl_floor
335 _GL_FUNCDECL_RPL (floor, double, (double x));
336 _GL_CXXALIAS_RPL (floor, double, (double x));
338 _GL_CXXALIAS_SYS (floor, double, (double x));
340 _GL_CXXALIASWARN (floor);
344 # if @REPLACE_FLOORL@
345 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
347 # define floorl rpl_floorl
349 _GL_FUNCDECL_RPL (floorl, long double, (long double x));
350 _GL_CXXALIAS_RPL (floorl, long double, (long double x));
352 # if !@HAVE_DECL_FLOORL@
353 _GL_FUNCDECL_SYS (floorl, long double, (long double x));
355 _GL_CXXALIAS_SYS (floorl, long double, (long double x));
357 _GL_CXXALIASWARN (floorl);
358 #elif defined GNULIB_POSIXCHECK
360 # if HAVE_RAW_DECL_FLOORL
361 _GL_WARN_ON_USE (floorl, "floorl is unportable - "
362 "use gnulib module floorl for portability");
370 _GL_FUNCDECL_SYS (fmodf, float, (float x, float y));
372 _GL_CXXALIAS_SYS (fmodf, float, (float x, float y));
373 _GL_CXXALIASWARN (fmodf);
374 #elif defined GNULIB_POSIXCHECK
376 # if HAVE_RAW_DECL_FMODF
377 _GL_WARN_ON_USE (fmodf, "fmodf is unportable - "
378 "use gnulib module fmodf for portability");
386 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
387 If x is zero: mantissa = x, exp = 0.
388 If x is infinite or NaN: mantissa = x, exp unspecified.
389 Store exp in *EXPPTR and return mantissa. */
391 # if @REPLACE_FREXPF@
392 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
394 # define frexpf rpl_frexpf
396 _GL_FUNCDECL_RPL (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
397 _GL_CXXALIAS_RPL (frexpf, float, (float x, int *expptr));
401 _GL_FUNCDECL_SYS (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
403 _GL_CXXALIAS_SYS (frexpf, float, (float x, int *expptr));
405 _GL_CXXALIASWARN (frexpf);
406 #elif defined GNULIB_POSIXCHECK
408 # if HAVE_RAW_DECL_FREXPF
409 _GL_WARN_ON_USE (frexpf, "frexpf is unportable - "
410 "use gnulib module frexpf for portability");
417 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
418 If x is zero: mantissa = x, exp = 0.
419 If x is infinite or NaN: mantissa = x, exp unspecified.
420 Store exp in *EXPPTR and return mantissa. */
423 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
424 # define frexp rpl_frexp
426 _GL_FUNCDECL_RPL (frexp, double, (double x, int *expptr) _GL_ARG_NONNULL ((2)));
427 _GL_CXXALIAS_RPL (frexp, double, (double x, int *expptr));
429 _GL_CXXALIAS_SYS (frexp, double, (double x, int *expptr));
431 _GL_CXXALIASWARN (frexp);
432 #elif defined GNULIB_POSIXCHECK
434 /* Assume frexp is always declared. */
435 _GL_WARN_ON_USE (frexp, "frexp is unportable - "
436 "use gnulib module frexp for portability");
442 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
443 If x is zero: mantissa = x, exp = 0.
444 If x is infinite or NaN: mantissa = x, exp unspecified.
445 Store exp in *EXPPTR and return mantissa. */
446 #if @GNULIB_FREXPL@ && @REPLACE_FREXPL@
447 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
449 # define frexpl rpl_frexpl
451 _GL_FUNCDECL_RPL (frexpl, long double,
452 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
453 _GL_CXXALIAS_RPL (frexpl, long double, (long double x, int *expptr));
455 # if !@HAVE_DECL_FREXPL@
456 _GL_FUNCDECL_SYS (frexpl, long double,
457 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
460 _GL_CXXALIAS_SYS (frexpl, long double, (long double x, int *expptr));
463 #if @GNULIB_FREXPL@ && !(@REPLACE_FREXPL@ && !@HAVE_DECL_FREXPL@)
464 _GL_CXXALIASWARN (frexpl);
466 #if !@GNULIB_FREXPL@ && defined GNULIB_POSIXCHECK
468 # if HAVE_RAW_DECL_FREXPL
469 _GL_WARN_ON_USE (frexpl, "frexpl is unportable - "
470 "use gnulib module frexpl for portability");
475 /* Return x * 2^exp. */
479 _GL_FUNCDECL_SYS (ldexpf, float, (float x, int exp));
481 _GL_CXXALIAS_SYS (ldexpf, float, (float x, int exp));
482 _GL_CXXALIASWARN (ldexpf);
483 #elif defined GNULIB_POSIXCHECK
485 # if HAVE_RAW_DECL_LDEXPF
486 _GL_WARN_ON_USE (ldexpf, "ldexpf is unportable - "
487 "use gnulib module ldexpf for portability");
491 /* Return x * 2^exp. */
492 #if @GNULIB_LDEXPL@ && @REPLACE_LDEXPL@
493 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
495 # define ldexpl rpl_ldexpl
497 _GL_FUNCDECL_RPL (ldexpl, long double, (long double x, int exp));
498 _GL_CXXALIAS_RPL (ldexpl, long double, (long double x, int exp));
500 # if !@HAVE_DECL_LDEXPL@
501 _GL_FUNCDECL_SYS (ldexpl, long double, (long double x, int exp));
504 _GL_CXXALIAS_SYS (ldexpl, long double, (long double x, int exp));
508 _GL_CXXALIASWARN (ldexpl);
510 #if !@GNULIB_LDEXPL@ && defined GNULIB_POSIXCHECK
512 # if HAVE_RAW_DECL_LDEXPL
513 _GL_WARN_ON_USE (ldexpl, "ldexpl is unportable - "
514 "use gnulib module ldexpl for portability");
520 # if !@HAVE_DECL_LOGB@
521 _GL_EXTERN_C double logb (double x);
523 #elif defined GNULIB_POSIXCHECK
525 # if HAVE_RAW_DECL_LOGB
526 _GL_WARN_ON_USE (logb, "logb is unportable - "
527 "use gnulib module logb for portability");
535 _GL_FUNCDECL_SYS (logf, float, (float x));
537 _GL_CXXALIAS_SYS (logf, float, (float x));
538 _GL_CXXALIASWARN (logf);
539 #elif defined GNULIB_POSIXCHECK
541 # if HAVE_RAW_DECL_LOGF
542 _GL_WARN_ON_USE (logf, "logf is unportable - "
543 "use gnulib module logf for portability");
548 # if !@HAVE_LOGL@ || !@HAVE_DECL_LOGL@
549 _GL_FUNCDECL_SYS (logl, long double, (long double x));
551 _GL_CXXALIAS_SYS (logl, long double, (long double x));
552 _GL_CXXALIASWARN (logl);
553 #elif defined GNULIB_POSIXCHECK
555 # if HAVE_RAW_DECL_LOGL
556 _GL_WARN_ON_USE (logl, "logl is unportable - "
557 "use gnulib module mathl for portability");
565 _GL_FUNCDECL_SYS (log10f, float, (float x));
567 _GL_CXXALIAS_SYS (log10f, float, (float x));
568 _GL_CXXALIASWARN (log10f);
569 #elif defined GNULIB_POSIXCHECK
571 # if HAVE_RAW_DECL_LOG10F
572 _GL_WARN_ON_USE (log10f, "log10f is unportable - "
573 "use gnulib module log10f for portability");
581 _GL_FUNCDECL_SYS (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
583 _GL_CXXALIAS_SYS (modff, float, (float x, float *iptr));
584 _GL_CXXALIASWARN (modff);
585 #elif defined GNULIB_POSIXCHECK
587 # if HAVE_RAW_DECL_MODFF
588 _GL_WARN_ON_USE (modff, "modff is unportable - "
589 "use gnulib module modff for portability");
597 _GL_FUNCDECL_SYS (powf, float, (float x, float y));
599 _GL_CXXALIAS_SYS (powf, float, (float x, float y));
600 _GL_CXXALIASWARN (powf);
601 #elif defined GNULIB_POSIXCHECK
603 # if HAVE_RAW_DECL_POWF
604 _GL_WARN_ON_USE (powf, "powf is unportable - "
605 "use gnulib module powf for portability");
611 # if @REPLACE_ROUNDF@
612 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
614 # define roundf rpl_roundf
616 _GL_FUNCDECL_RPL (roundf, float, (float x));
617 _GL_CXXALIAS_RPL (roundf, float, (float x));
619 # if !@HAVE_DECL_ROUNDF@
620 _GL_FUNCDECL_SYS (roundf, float, (float x));
622 _GL_CXXALIAS_SYS (roundf, float, (float x));
624 _GL_CXXALIASWARN (roundf);
625 #elif defined GNULIB_POSIXCHECK
627 # if HAVE_RAW_DECL_ROUNDF
628 _GL_WARN_ON_USE (roundf, "roundf is unportable - "
629 "use gnulib module roundf for portability");
635 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
637 # define round rpl_round
639 _GL_FUNCDECL_RPL (round, double, (double x));
640 _GL_CXXALIAS_RPL (round, double, (double x));
642 # if !@HAVE_DECL_ROUND@
643 _GL_FUNCDECL_SYS (round, double, (double x));
645 _GL_CXXALIAS_SYS (round, double, (double x));
647 _GL_CXXALIASWARN (round);
648 #elif defined GNULIB_POSIXCHECK
650 # if HAVE_RAW_DECL_ROUND
651 _GL_WARN_ON_USE (round, "round is unportable - "
652 "use gnulib module round for portability");
657 # if @REPLACE_ROUNDL@
658 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
660 # define roundl rpl_roundl
662 _GL_FUNCDECL_RPL (roundl, long double, (long double x));
663 _GL_CXXALIAS_RPL (roundl, long double, (long double x));
665 # if !@HAVE_DECL_ROUNDL@
666 _GL_FUNCDECL_SYS (roundl, long double, (long double x));
668 _GL_CXXALIAS_SYS (roundl, long double, (long double x));
670 _GL_CXXALIASWARN (roundl);
671 #elif defined GNULIB_POSIXCHECK
673 # if HAVE_RAW_DECL_ROUNDL
674 _GL_WARN_ON_USE (roundl, "roundl is unportable - "
675 "use gnulib module roundl for portability");
683 _GL_FUNCDECL_SYS (sinf, float, (float x));
685 _GL_CXXALIAS_SYS (sinf, float, (float x));
686 _GL_CXXALIASWARN (sinf);
687 #elif defined GNULIB_POSIXCHECK
689 # if HAVE_RAW_DECL_SINF
690 _GL_WARN_ON_USE (sinf, "sinf is unportable - "
691 "use gnulib module sinf for portability");
696 # if !@HAVE_SINL@ || !@HAVE_DECL_SINL@
697 _GL_FUNCDECL_SYS (sinl, long double, (long double x));
699 _GL_CXXALIAS_SYS (sinl, long double, (long double x));
700 _GL_CXXALIASWARN (sinl);
701 #elif defined GNULIB_POSIXCHECK
703 # if HAVE_RAW_DECL_SINL
704 _GL_WARN_ON_USE (sinl, "sinl is unportable - "
705 "use gnulib module mathl for portability");
713 _GL_FUNCDECL_SYS (sqrtf, float, (float x));
715 _GL_CXXALIAS_SYS (sqrtf, float, (float x));
716 _GL_CXXALIASWARN (sqrtf);
717 #elif defined GNULIB_POSIXCHECK
719 # if HAVE_RAW_DECL_SQRTF
720 _GL_WARN_ON_USE (sqrtf, "sqrtf is unportable - "
721 "use gnulib module sqrtf for portability");
726 # if !@HAVE_SQRTL@ || !@HAVE_DECL_SQRTL@
727 _GL_FUNCDECL_SYS (sqrtl, long double, (long double x));
729 _GL_CXXALIAS_SYS (sqrtl, long double, (long double x));
730 _GL_CXXALIASWARN (sqrtl);
731 #elif defined GNULIB_POSIXCHECK
733 # if HAVE_RAW_DECL_SQRTL
734 _GL_WARN_ON_USE (sqrtl, "sqrtl is unportable - "
735 "use gnulib module mathl for portability");
743 _GL_FUNCDECL_SYS (tanf, float, (float x));
745 _GL_CXXALIAS_SYS (tanf, float, (float x));
746 _GL_CXXALIASWARN (tanf);
747 #elif defined GNULIB_POSIXCHECK
749 # if HAVE_RAW_DECL_TANF
750 _GL_WARN_ON_USE (tanf, "tanf is unportable - "
751 "use gnulib module tanf for portability");
756 # if !@HAVE_TANL@ || !@HAVE_DECL_TANL@
757 _GL_FUNCDECL_SYS (tanl, long double, (long double x));
759 _GL_CXXALIAS_SYS (tanl, long double, (long double x));
760 _GL_CXXALIASWARN (tanl);
761 #elif defined GNULIB_POSIXCHECK
763 # if HAVE_RAW_DECL_TANL
764 _GL_WARN_ON_USE (tanl, "tanl is unportable - "
765 "use gnulib module mathl for portability");
771 # if @REPLACE_TRUNCF@
772 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
773 # define truncf rpl_truncf
775 _GL_FUNCDECL_RPL (truncf, float, (float x));
776 _GL_CXXALIAS_RPL (truncf, float, (float x));
778 # if !@HAVE_DECL_TRUNCF@
779 _GL_FUNCDECL_SYS (truncf, float, (float x));
781 _GL_CXXALIAS_SYS (truncf, float, (float x));
783 _GL_CXXALIASWARN (truncf);
784 #elif defined GNULIB_POSIXCHECK
786 # if HAVE_RAW_DECL_TRUNCF
787 _GL_WARN_ON_USE (truncf, "truncf is unportable - "
788 "use gnulib module truncf for portability");
794 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
795 # define trunc rpl_trunc
797 _GL_FUNCDECL_RPL (trunc, double, (double x));
798 _GL_CXXALIAS_RPL (trunc, double, (double x));
800 # if !@HAVE_DECL_TRUNC@
801 _GL_FUNCDECL_SYS (trunc, double, (double x));
803 _GL_CXXALIAS_SYS (trunc, double, (double x));
805 _GL_CXXALIASWARN (trunc);
806 #elif defined GNULIB_POSIXCHECK
808 # if HAVE_RAW_DECL_TRUNC
809 _GL_WARN_ON_USE (trunc, "trunc is unportable - "
810 "use gnulib module trunc for portability");
815 # if @REPLACE_TRUNCL@
816 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
818 # define truncl rpl_truncl
820 _GL_FUNCDECL_RPL (truncl, long double, (long double x));
821 _GL_CXXALIAS_RPL (truncl, long double, (long double x));
823 # if !@HAVE_DECL_TRUNCL@
824 _GL_FUNCDECL_SYS (truncl, long double, (long double x));
826 _GL_CXXALIAS_SYS (truncl, long double, (long double x));
828 _GL_CXXALIASWARN (truncl);
829 #elif defined GNULIB_POSIXCHECK
831 # if HAVE_RAW_DECL_TRUNCL
832 _GL_WARN_ON_USE (truncl, "truncl is unportable - "
833 "use gnulib module truncl for portability");
838 /* Definitions of function-like macros come here, after the function
842 #if @GNULIB_ISFINITE@
843 # if @REPLACE_ISFINITE@
844 _GL_EXTERN_C int gl_isfinitef (float x);
845 _GL_EXTERN_C int gl_isfinited (double x);
846 _GL_EXTERN_C int gl_isfinitel (long double x);
848 # define isfinite(x) \
849 (sizeof (x) == sizeof (long double) ? gl_isfinitel (x) : \
850 sizeof (x) == sizeof (double) ? gl_isfinited (x) : \
853 #elif defined GNULIB_POSIXCHECK
854 # if defined isfinite
855 _GL_WARN_REAL_FLOATING_DECL (isfinite);
857 # define isfinite(x) _GL_WARN_REAL_FLOATING_IMPL (isfinite, x)
864 _GL_EXTERN_C int gl_isinff (float x);
865 _GL_EXTERN_C int gl_isinfd (double x);
866 _GL_EXTERN_C int gl_isinfl (long double x);
869 (sizeof (x) == sizeof (long double) ? gl_isinfl (x) : \
870 sizeof (x) == sizeof (double) ? gl_isinfd (x) : \
873 #elif defined GNULIB_POSIXCHECK
875 _GL_WARN_REAL_FLOATING_DECL (isinf);
877 # define isinf(x) _GL_WARN_REAL_FLOATING_IMPL (isinf, x)
883 /* Test for NaN for 'float' numbers. */
885 /* The original <math.h> included above provides a declaration of isnan macro
886 or (older) isnanf function. */
888 /* GCC 4.0 and newer provides three built-ins for isnan. */
890 # define isnanf(x) __builtin_isnanf ((float)(x))
893 # define isnanf(x) isnan ((float)(x))
896 /* Test whether X is a NaN. */
898 # define isnanf rpl_isnanf
899 _GL_EXTERN_C int isnanf (float x);
904 /* Test for NaN for 'double' numbers.
905 This function is a gnulib extension, unlike isnan() which applied only
906 to 'double' numbers earlier but now is a type-generic macro. */
908 /* The original <math.h> included above provides a declaration of isnan
911 /* GCC 4.0 and newer provides three built-ins for isnan. */
913 # define isnand(x) __builtin_isnan ((double)(x))
916 # define isnand(x) isnan ((double)(x))
919 /* Test whether X is a NaN. */
921 # define isnand rpl_isnand
922 _GL_EXTERN_C int isnand (double x);
927 /* Test for NaN for 'long double' numbers. */
929 /* The original <math.h> included above provides a declaration of isnan
930 macro or (older) isnanl function. */
932 /* GCC 4.0 and newer provides three built-ins for isnan. */
934 # define isnanl(x) __builtin_isnanl ((long double)(x))
937 # define isnanl(x) isnan ((long double)(x))
940 /* Test whether X is a NaN. */
942 # define isnanl rpl_isnanl
943 _GL_EXTERN_C int isnanl (long double x);
947 /* This must come *after* the snippets for GNULIB_ISNANF and GNULIB_ISNANL! */
950 /* We can't just use the isnanf macro (e.g.) as exposed by
951 isnanf.h (e.g.) here, because those may end up being macros
952 that recursively expand back to isnan. So use the gnulib
953 replacements for them directly. */
954 # if @HAVE_ISNANF@ && __GNUC__ >= 4
955 # define gl_isnan_f(x) __builtin_isnanf ((float)(x))
957 _GL_EXTERN_C int rpl_isnanf (float x);
958 # define gl_isnan_f(x) rpl_isnanf (x)
960 # if @HAVE_ISNAND@ && __GNUC__ >= 4
961 # define gl_isnan_d(x) __builtin_isnan ((double)(x))
963 _GL_EXTERN_C int rpl_isnand (double x);
964 # define gl_isnan_d(x) rpl_isnand (x)
966 # if @HAVE_ISNANL@ && __GNUC__ >= 4
967 # define gl_isnan_l(x) __builtin_isnanl ((long double)(x))
969 _GL_EXTERN_C int rpl_isnanl (long double x);
970 # define gl_isnan_l(x) rpl_isnanl (x)
974 (sizeof (x) == sizeof (long double) ? gl_isnan_l (x) : \
975 sizeof (x) == sizeof (double) ? gl_isnan_d (x) : \
980 (sizeof (x) == sizeof (long double) ? __builtin_isnanl ((long double)(x)) : \
981 sizeof (x) == sizeof (double) ? __builtin_isnan ((double)(x)) : \
982 __builtin_isnanf ((float)(x)))
984 /* Ensure isnan is a macro. */
988 #elif defined GNULIB_POSIXCHECK
990 _GL_WARN_REAL_FLOATING_DECL (isnan);
992 # define isnan(x) _GL_WARN_REAL_FLOATING_IMPL (isnan, x)
998 # if @REPLACE_SIGNBIT_USING_GCC@
1000 /* GCC 4.0 and newer provides three built-ins for signbit. */
1001 # define signbit(x) \
1002 (sizeof (x) == sizeof (long double) ? __builtin_signbitl (x) : \
1003 sizeof (x) == sizeof (double) ? __builtin_signbit (x) : \
1004 __builtin_signbitf (x))
1006 # if @REPLACE_SIGNBIT@
1008 _GL_EXTERN_C int gl_signbitf (float arg);
1009 _GL_EXTERN_C int gl_signbitd (double arg);
1010 _GL_EXTERN_C int gl_signbitl (long double arg);
1011 # if __GNUC__ >= 2 && !__STRICT_ANSI__
1012 # define _GL_NUM_UINT_WORDS(type) \
1013 ((sizeof (type) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
1014 # if defined FLT_SIGNBIT_WORD && defined FLT_SIGNBIT_BIT && !defined gl_signbitf
1015 # define gl_signbitf_OPTIMIZED_MACRO
1016 # define gl_signbitf(arg) \
1017 ({ union { float _value; \
1018 unsigned int _word[_GL_NUM_UINT_WORDS (float)]; \
1020 _m._value = (arg); \
1021 (_m._word[FLT_SIGNBIT_WORD] >> FLT_SIGNBIT_BIT) & 1; \
1024 # if defined DBL_SIGNBIT_WORD && defined DBL_SIGNBIT_BIT && !defined gl_signbitd
1025 # define gl_signbitd_OPTIMIZED_MACRO
1026 # define gl_signbitd(arg) \
1027 ({ union { double _value; \
1028 unsigned int _word[_GL_NUM_UINT_WORDS (double)]; \
1030 _m._value = (arg); \
1031 (_m._word[DBL_SIGNBIT_WORD] >> DBL_SIGNBIT_BIT) & 1; \
1034 # if defined LDBL_SIGNBIT_WORD && defined LDBL_SIGNBIT_BIT && !defined gl_signbitl
1035 # define gl_signbitl_OPTIMIZED_MACRO
1036 # define gl_signbitl(arg) \
1037 ({ union { long double _value; \
1038 unsigned int _word[_GL_NUM_UINT_WORDS (long double)]; \
1040 _m._value = (arg); \
1041 (_m._word[LDBL_SIGNBIT_WORD] >> LDBL_SIGNBIT_BIT) & 1; \
1045 # define signbit(x) \
1046 (sizeof (x) == sizeof (long double) ? gl_signbitl (x) : \
1047 sizeof (x) == sizeof (double) ? gl_signbitd (x) : \
1050 #elif defined GNULIB_POSIXCHECK
1051 # if defined signbit
1052 _GL_WARN_REAL_FLOATING_DECL (signbit);
1054 # define signbit(x) _GL_WARN_REAL_FLOATING_IMPL (signbit, x)
1059 #endif /* _@GUARD_PREFIX@_MATH_H */
1060 #endif /* _@GUARD_PREFIX@_MATH_H */