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");
219 _GL_FUNCDECL_SYS (cosf, float, (float x));
221 _GL_CXXALIAS_SYS (cosf, float, (float x));
222 _GL_CXXALIASWARN (cosf);
223 #elif defined GNULIB_POSIXCHECK
225 # if HAVE_RAW_DECL_COSF
226 _GL_WARN_ON_USE (cosf, "cosf is unportable - "
227 "use gnulib module cosf for portability");
232 # if !@HAVE_COSL@ || !@HAVE_DECL_COSL@
233 _GL_FUNCDECL_SYS (cosl, long double, (long double x));
235 _GL_CXXALIAS_SYS (cosl, long double, (long double x));
236 _GL_CXXALIASWARN (cosl);
237 #elif defined GNULIB_POSIXCHECK
239 # if HAVE_RAW_DECL_COSL
240 _GL_WARN_ON_USE (cosl, "cosl is unportable - "
241 "use gnulib module mathl for portability");
249 _GL_FUNCDECL_SYS (expf, float, (float x));
251 _GL_CXXALIAS_SYS (expf, float, (float x));
252 _GL_CXXALIASWARN (expf);
253 #elif defined GNULIB_POSIXCHECK
255 # if HAVE_RAW_DECL_EXPF
256 _GL_WARN_ON_USE (expf, "expf is unportable - "
257 "use gnulib module expf for portability");
262 # if !@HAVE_EXPL@ || !@HAVE_DECL_EXPL@
263 _GL_FUNCDECL_SYS (expl, long double, (long double x));
265 _GL_CXXALIAS_SYS (expl, long double, (long double x));
266 _GL_CXXALIASWARN (expl);
267 #elif defined GNULIB_POSIXCHECK
269 # if HAVE_RAW_DECL_EXPL
270 _GL_WARN_ON_USE (expl, "expl is unportable - "
271 "use gnulib module mathl for portability");
279 _GL_FUNCDECL_SYS (fabsf, float, (float x));
281 _GL_CXXALIAS_SYS (fabsf, float, (float x));
282 _GL_CXXALIASWARN (fabsf);
283 #elif defined GNULIB_POSIXCHECK
285 # if HAVE_RAW_DECL_FABSF
286 _GL_WARN_ON_USE (fabsf, "fabsf is unportable - "
287 "use gnulib module fabsf for portability");
293 # if @REPLACE_FLOORF@
294 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
296 # define floorf rpl_floorf
298 _GL_FUNCDECL_RPL (floorf, float, (float x));
299 _GL_CXXALIAS_RPL (floorf, float, (float x));
301 # if !@HAVE_DECL_FLOORF@
302 _GL_FUNCDECL_SYS (floorf, float, (float x));
304 _GL_CXXALIAS_SYS (floorf, float, (float x));
306 _GL_CXXALIASWARN (floorf);
307 #elif defined GNULIB_POSIXCHECK
309 # if HAVE_RAW_DECL_FLOORF
310 _GL_WARN_ON_USE (floorf, "floorf is unportable - "
311 "use gnulib module floorf for portability");
317 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
318 # define floor rpl_floor
320 _GL_FUNCDECL_RPL (floor, double, (double x));
321 _GL_CXXALIAS_RPL (floor, double, (double x));
323 _GL_CXXALIAS_SYS (floor, double, (double x));
325 _GL_CXXALIASWARN (floor);
329 # if @REPLACE_FLOORL@
330 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
332 # define floorl rpl_floorl
334 _GL_FUNCDECL_RPL (floorl, long double, (long double x));
335 _GL_CXXALIAS_RPL (floorl, long double, (long double x));
337 # if !@HAVE_DECL_FLOORL@
338 _GL_FUNCDECL_SYS (floorl, long double, (long double x));
340 _GL_CXXALIAS_SYS (floorl, long double, (long double x));
342 _GL_CXXALIASWARN (floorl);
343 #elif defined GNULIB_POSIXCHECK
345 # if HAVE_RAW_DECL_FLOORL
346 _GL_WARN_ON_USE (floorl, "floorl is unportable - "
347 "use gnulib module floorl for portability");
355 _GL_FUNCDECL_SYS (fmodf, float, (float x, float y));
357 _GL_CXXALIAS_SYS (fmodf, float, (float x, float y));
358 _GL_CXXALIASWARN (fmodf);
359 #elif defined GNULIB_POSIXCHECK
361 # if HAVE_RAW_DECL_FMODF
362 _GL_WARN_ON_USE (fmodf, "fmodf is unportable - "
363 "use gnulib module fmodf for portability");
371 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
372 If x is zero: mantissa = x, exp = 0.
373 If x is infinite or NaN: mantissa = x, exp unspecified.
374 Store exp in *EXPPTR and return mantissa. */
376 # if @REPLACE_FREXPF@
377 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
379 # define frexpf rpl_frexpf
381 _GL_FUNCDECL_RPL (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
382 _GL_CXXALIAS_RPL (frexpf, float, (float x, int *expptr));
386 _GL_FUNCDECL_SYS (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
388 _GL_CXXALIAS_SYS (frexpf, float, (float x, int *expptr));
390 _GL_CXXALIASWARN (frexpf);
391 #elif defined GNULIB_POSIXCHECK
393 # if HAVE_RAW_DECL_FREXPF
394 _GL_WARN_ON_USE (frexpf, "frexpf is unportable - "
395 "use gnulib module frexpf for portability");
402 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
403 If x is zero: mantissa = x, exp = 0.
404 If x is infinite or NaN: mantissa = x, exp unspecified.
405 Store exp in *EXPPTR and return mantissa. */
408 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
409 # define frexp rpl_frexp
411 _GL_FUNCDECL_RPL (frexp, double, (double x, int *expptr) _GL_ARG_NONNULL ((2)));
412 _GL_CXXALIAS_RPL (frexp, double, (double x, int *expptr));
414 _GL_CXXALIAS_SYS (frexp, double, (double x, int *expptr));
416 _GL_CXXALIASWARN (frexp);
417 #elif defined GNULIB_POSIXCHECK
419 /* Assume frexp is always declared. */
420 _GL_WARN_ON_USE (frexp, "frexp is unportable - "
421 "use gnulib module frexp for portability");
427 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
428 If x is zero: mantissa = x, exp = 0.
429 If x is infinite or NaN: mantissa = x, exp unspecified.
430 Store exp in *EXPPTR and return mantissa. */
431 #if @GNULIB_FREXPL@ && @REPLACE_FREXPL@
432 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
434 # define frexpl rpl_frexpl
436 _GL_FUNCDECL_RPL (frexpl, long double,
437 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
438 _GL_CXXALIAS_RPL (frexpl, long double, (long double x, int *expptr));
440 # if !@HAVE_DECL_FREXPL@
441 _GL_FUNCDECL_SYS (frexpl, long double,
442 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
445 _GL_CXXALIAS_SYS (frexpl, long double, (long double x, int *expptr));
448 #if @GNULIB_FREXPL@ && !(@REPLACE_FREXPL@ && !@HAVE_DECL_FREXPL@)
449 _GL_CXXALIASWARN (frexpl);
451 #if !@GNULIB_FREXPL@ && defined GNULIB_POSIXCHECK
453 # if HAVE_RAW_DECL_FREXPL
454 _GL_WARN_ON_USE (frexpl, "frexpl is unportable - "
455 "use gnulib module frexpl for portability");
460 /* Return x * 2^exp. */
464 _GL_FUNCDECL_SYS (ldexpf, float, (float x, int exp));
466 _GL_CXXALIAS_SYS (ldexpf, float, (float x, int exp));
467 _GL_CXXALIASWARN (ldexpf);
468 #elif defined GNULIB_POSIXCHECK
470 # if HAVE_RAW_DECL_LDEXPF
471 _GL_WARN_ON_USE (ldexpf, "ldexpf is unportable - "
472 "use gnulib module ldexpf for portability");
476 /* Return x * 2^exp. */
477 #if @GNULIB_LDEXPL@ && @REPLACE_LDEXPL@
478 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
480 # define ldexpl rpl_ldexpl
482 _GL_FUNCDECL_RPL (ldexpl, long double, (long double x, int exp));
483 _GL_CXXALIAS_RPL (ldexpl, long double, (long double x, int exp));
485 # if !@HAVE_DECL_LDEXPL@
486 _GL_FUNCDECL_SYS (ldexpl, long double, (long double x, int exp));
489 _GL_CXXALIAS_SYS (ldexpl, long double, (long double x, int exp));
493 _GL_CXXALIASWARN (ldexpl);
495 #if !@GNULIB_LDEXPL@ && defined GNULIB_POSIXCHECK
497 # if HAVE_RAW_DECL_LDEXPL
498 _GL_WARN_ON_USE (ldexpl, "ldexpl is unportable - "
499 "use gnulib module ldexpl for portability");
505 # if !@HAVE_DECL_LOGB@
506 _GL_EXTERN_C double logb (double x);
508 #elif defined GNULIB_POSIXCHECK
510 # if HAVE_RAW_DECL_LOGB
511 _GL_WARN_ON_USE (logb, "logb is unportable - "
512 "use gnulib module logb for portability");
520 _GL_FUNCDECL_SYS (logf, float, (float x));
522 _GL_CXXALIAS_SYS (logf, float, (float x));
523 _GL_CXXALIASWARN (logf);
524 #elif defined GNULIB_POSIXCHECK
526 # if HAVE_RAW_DECL_LOGF
527 _GL_WARN_ON_USE (logf, "logf is unportable - "
528 "use gnulib module logf for portability");
533 # if !@HAVE_LOGL@ || !@HAVE_DECL_LOGL@
534 _GL_FUNCDECL_SYS (logl, long double, (long double x));
536 _GL_CXXALIAS_SYS (logl, long double, (long double x));
537 _GL_CXXALIASWARN (logl);
538 #elif defined GNULIB_POSIXCHECK
540 # if HAVE_RAW_DECL_LOGL
541 _GL_WARN_ON_USE (logl, "logl is unportable - "
542 "use gnulib module mathl for portability");
550 _GL_FUNCDECL_SYS (log10f, float, (float x));
552 _GL_CXXALIAS_SYS (log10f, float, (float x));
553 _GL_CXXALIASWARN (log10f);
554 #elif defined GNULIB_POSIXCHECK
556 # if HAVE_RAW_DECL_LOG10F
557 _GL_WARN_ON_USE (log10f, "log10f is unportable - "
558 "use gnulib module log10f for portability");
566 _GL_FUNCDECL_SYS (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
568 _GL_CXXALIAS_SYS (modff, float, (float x, float *iptr));
569 _GL_CXXALIASWARN (modff);
570 #elif defined GNULIB_POSIXCHECK
572 # if HAVE_RAW_DECL_MODFF
573 _GL_WARN_ON_USE (modff, "modff is unportable - "
574 "use gnulib module modff for portability");
582 _GL_FUNCDECL_SYS (powf, float, (float x, float y));
584 _GL_CXXALIAS_SYS (powf, float, (float x, float y));
585 _GL_CXXALIASWARN (powf);
586 #elif defined GNULIB_POSIXCHECK
588 # if HAVE_RAW_DECL_POWF
589 _GL_WARN_ON_USE (powf, "powf is unportable - "
590 "use gnulib module powf for portability");
596 # if @REPLACE_ROUNDF@
597 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
599 # define roundf rpl_roundf
601 _GL_FUNCDECL_RPL (roundf, float, (float x));
602 _GL_CXXALIAS_RPL (roundf, float, (float x));
604 # if !@HAVE_DECL_ROUNDF@
605 _GL_FUNCDECL_SYS (roundf, float, (float x));
607 _GL_CXXALIAS_SYS (roundf, float, (float x));
609 _GL_CXXALIASWARN (roundf);
610 #elif defined GNULIB_POSIXCHECK
612 # if HAVE_RAW_DECL_ROUNDF
613 _GL_WARN_ON_USE (roundf, "roundf is unportable - "
614 "use gnulib module roundf for portability");
620 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
622 # define round rpl_round
624 _GL_FUNCDECL_RPL (round, double, (double x));
625 _GL_CXXALIAS_RPL (round, double, (double x));
627 # if !@HAVE_DECL_ROUND@
628 _GL_FUNCDECL_SYS (round, double, (double x));
630 _GL_CXXALIAS_SYS (round, double, (double x));
632 _GL_CXXALIASWARN (round);
633 #elif defined GNULIB_POSIXCHECK
635 # if HAVE_RAW_DECL_ROUND
636 _GL_WARN_ON_USE (round, "round is unportable - "
637 "use gnulib module round for portability");
642 # if @REPLACE_ROUNDL@
643 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
645 # define roundl rpl_roundl
647 _GL_FUNCDECL_RPL (roundl, long double, (long double x));
648 _GL_CXXALIAS_RPL (roundl, long double, (long double x));
650 # if !@HAVE_DECL_ROUNDL@
651 _GL_FUNCDECL_SYS (roundl, long double, (long double x));
653 _GL_CXXALIAS_SYS (roundl, long double, (long double x));
655 _GL_CXXALIASWARN (roundl);
656 #elif defined GNULIB_POSIXCHECK
658 # if HAVE_RAW_DECL_ROUNDL
659 _GL_WARN_ON_USE (roundl, "roundl is unportable - "
660 "use gnulib module roundl for portability");
668 _GL_FUNCDECL_SYS (sinf, float, (float x));
670 _GL_CXXALIAS_SYS (sinf, float, (float x));
671 _GL_CXXALIASWARN (sinf);
672 #elif defined GNULIB_POSIXCHECK
674 # if HAVE_RAW_DECL_SINF
675 _GL_WARN_ON_USE (sinf, "sinf is unportable - "
676 "use gnulib module sinf for portability");
681 # if !@HAVE_SINL@ || !@HAVE_DECL_SINL@
682 _GL_FUNCDECL_SYS (sinl, long double, (long double x));
684 _GL_CXXALIAS_SYS (sinl, long double, (long double x));
685 _GL_CXXALIASWARN (sinl);
686 #elif defined GNULIB_POSIXCHECK
688 # if HAVE_RAW_DECL_SINL
689 _GL_WARN_ON_USE (sinl, "sinl is unportable - "
690 "use gnulib module mathl for portability");
698 _GL_FUNCDECL_SYS (sqrtf, float, (float x));
700 _GL_CXXALIAS_SYS (sqrtf, float, (float x));
701 _GL_CXXALIASWARN (sqrtf);
702 #elif defined GNULIB_POSIXCHECK
704 # if HAVE_RAW_DECL_SQRTF
705 _GL_WARN_ON_USE (sqrtf, "sqrtf is unportable - "
706 "use gnulib module sqrtf for portability");
711 # if !@HAVE_SQRTL@ || !@HAVE_DECL_SQRTL@
712 _GL_FUNCDECL_SYS (sqrtl, long double, (long double x));
714 _GL_CXXALIAS_SYS (sqrtl, long double, (long double x));
715 _GL_CXXALIASWARN (sqrtl);
716 #elif defined GNULIB_POSIXCHECK
718 # if HAVE_RAW_DECL_SQRTL
719 _GL_WARN_ON_USE (sqrtl, "sqrtl is unportable - "
720 "use gnulib module mathl for portability");
726 # if !@HAVE_TANL@ || !@HAVE_DECL_TANL@
727 _GL_FUNCDECL_SYS (tanl, long double, (long double x));
729 _GL_CXXALIAS_SYS (tanl, long double, (long double x));
730 _GL_CXXALIASWARN (tanl);
731 #elif defined GNULIB_POSIXCHECK
733 # if HAVE_RAW_DECL_TANL
734 _GL_WARN_ON_USE (tanl, "tanl is unportable - "
735 "use gnulib module mathl for portability");
741 # if @REPLACE_TRUNCF@
742 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
743 # define truncf rpl_truncf
745 _GL_FUNCDECL_RPL (truncf, float, (float x));
746 _GL_CXXALIAS_RPL (truncf, float, (float x));
748 # if !@HAVE_DECL_TRUNCF@
749 _GL_FUNCDECL_SYS (truncf, float, (float x));
751 _GL_CXXALIAS_SYS (truncf, float, (float x));
753 _GL_CXXALIASWARN (truncf);
754 #elif defined GNULIB_POSIXCHECK
756 # if HAVE_RAW_DECL_TRUNCF
757 _GL_WARN_ON_USE (truncf, "truncf is unportable - "
758 "use gnulib module truncf for portability");
764 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
765 # define trunc rpl_trunc
767 _GL_FUNCDECL_RPL (trunc, double, (double x));
768 _GL_CXXALIAS_RPL (trunc, double, (double x));
770 # if !@HAVE_DECL_TRUNC@
771 _GL_FUNCDECL_SYS (trunc, double, (double x));
773 _GL_CXXALIAS_SYS (trunc, double, (double x));
775 _GL_CXXALIASWARN (trunc);
776 #elif defined GNULIB_POSIXCHECK
778 # if HAVE_RAW_DECL_TRUNC
779 _GL_WARN_ON_USE (trunc, "trunc is unportable - "
780 "use gnulib module trunc for portability");
785 # if @REPLACE_TRUNCL@
786 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
788 # define truncl rpl_truncl
790 _GL_FUNCDECL_RPL (truncl, long double, (long double x));
791 _GL_CXXALIAS_RPL (truncl, long double, (long double x));
793 # if !@HAVE_DECL_TRUNCL@
794 _GL_FUNCDECL_SYS (truncl, long double, (long double x));
796 _GL_CXXALIAS_SYS (truncl, long double, (long double x));
798 _GL_CXXALIASWARN (truncl);
799 #elif defined GNULIB_POSIXCHECK
801 # if HAVE_RAW_DECL_TRUNCL
802 _GL_WARN_ON_USE (truncl, "truncl is unportable - "
803 "use gnulib module truncl for portability");
808 /* Definitions of function-like macros come here, after the function
812 #if @GNULIB_ISFINITE@
813 # if @REPLACE_ISFINITE@
814 _GL_EXTERN_C int gl_isfinitef (float x);
815 _GL_EXTERN_C int gl_isfinited (double x);
816 _GL_EXTERN_C int gl_isfinitel (long double x);
818 # define isfinite(x) \
819 (sizeof (x) == sizeof (long double) ? gl_isfinitel (x) : \
820 sizeof (x) == sizeof (double) ? gl_isfinited (x) : \
823 #elif defined GNULIB_POSIXCHECK
824 # if defined isfinite
825 _GL_WARN_REAL_FLOATING_DECL (isfinite);
827 # define isfinite(x) _GL_WARN_REAL_FLOATING_IMPL (isfinite, x)
834 _GL_EXTERN_C int gl_isinff (float x);
835 _GL_EXTERN_C int gl_isinfd (double x);
836 _GL_EXTERN_C int gl_isinfl (long double x);
839 (sizeof (x) == sizeof (long double) ? gl_isinfl (x) : \
840 sizeof (x) == sizeof (double) ? gl_isinfd (x) : \
843 #elif defined GNULIB_POSIXCHECK
845 _GL_WARN_REAL_FLOATING_DECL (isinf);
847 # define isinf(x) _GL_WARN_REAL_FLOATING_IMPL (isinf, x)
853 /* Test for NaN for 'float' numbers. */
855 /* The original <math.h> included above provides a declaration of isnan macro
856 or (older) isnanf function. */
858 /* GCC 4.0 and newer provides three built-ins for isnan. */
860 # define isnanf(x) __builtin_isnanf ((float)(x))
863 # define isnanf(x) isnan ((float)(x))
866 /* Test whether X is a NaN. */
868 # define isnanf rpl_isnanf
869 _GL_EXTERN_C int isnanf (float x);
874 /* Test for NaN for 'double' numbers.
875 This function is a gnulib extension, unlike isnan() which applied only
876 to 'double' numbers earlier but now is a type-generic macro. */
878 /* The original <math.h> included above provides a declaration of isnan
881 /* GCC 4.0 and newer provides three built-ins for isnan. */
883 # define isnand(x) __builtin_isnan ((double)(x))
886 # define isnand(x) isnan ((double)(x))
889 /* Test whether X is a NaN. */
891 # define isnand rpl_isnand
892 _GL_EXTERN_C int isnand (double x);
897 /* Test for NaN for 'long double' numbers. */
899 /* The original <math.h> included above provides a declaration of isnan
900 macro or (older) isnanl function. */
902 /* GCC 4.0 and newer provides three built-ins for isnan. */
904 # define isnanl(x) __builtin_isnanl ((long double)(x))
907 # define isnanl(x) isnan ((long double)(x))
910 /* Test whether X is a NaN. */
912 # define isnanl rpl_isnanl
913 _GL_EXTERN_C int isnanl (long double x);
917 /* This must come *after* the snippets for GNULIB_ISNANF and GNULIB_ISNANL! */
920 /* We can't just use the isnanf macro (e.g.) as exposed by
921 isnanf.h (e.g.) here, because those may end up being macros
922 that recursively expand back to isnan. So use the gnulib
923 replacements for them directly. */
924 # if @HAVE_ISNANF@ && __GNUC__ >= 4
925 # define gl_isnan_f(x) __builtin_isnanf ((float)(x))
927 _GL_EXTERN_C int rpl_isnanf (float x);
928 # define gl_isnan_f(x) rpl_isnanf (x)
930 # if @HAVE_ISNAND@ && __GNUC__ >= 4
931 # define gl_isnan_d(x) __builtin_isnan ((double)(x))
933 _GL_EXTERN_C int rpl_isnand (double x);
934 # define gl_isnan_d(x) rpl_isnand (x)
936 # if @HAVE_ISNANL@ && __GNUC__ >= 4
937 # define gl_isnan_l(x) __builtin_isnanl ((long double)(x))
939 _GL_EXTERN_C int rpl_isnanl (long double x);
940 # define gl_isnan_l(x) rpl_isnanl (x)
944 (sizeof (x) == sizeof (long double) ? gl_isnan_l (x) : \
945 sizeof (x) == sizeof (double) ? gl_isnan_d (x) : \
950 (sizeof (x) == sizeof (long double) ? __builtin_isnanl ((long double)(x)) : \
951 sizeof (x) == sizeof (double) ? __builtin_isnan ((double)(x)) : \
952 __builtin_isnanf ((float)(x)))
954 /* Ensure isnan is a macro. */
958 #elif defined GNULIB_POSIXCHECK
960 _GL_WARN_REAL_FLOATING_DECL (isnan);
962 # define isnan(x) _GL_WARN_REAL_FLOATING_IMPL (isnan, x)
968 # if @REPLACE_SIGNBIT_USING_GCC@
970 /* GCC 4.0 and newer provides three built-ins for signbit. */
971 # define signbit(x) \
972 (sizeof (x) == sizeof (long double) ? __builtin_signbitl (x) : \
973 sizeof (x) == sizeof (double) ? __builtin_signbit (x) : \
974 __builtin_signbitf (x))
976 # if @REPLACE_SIGNBIT@
978 _GL_EXTERN_C int gl_signbitf (float arg);
979 _GL_EXTERN_C int gl_signbitd (double arg);
980 _GL_EXTERN_C int gl_signbitl (long double arg);
981 # if __GNUC__ >= 2 && !__STRICT_ANSI__
982 # define _GL_NUM_UINT_WORDS(type) \
983 ((sizeof (type) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
984 # if defined FLT_SIGNBIT_WORD && defined FLT_SIGNBIT_BIT && !defined gl_signbitf
985 # define gl_signbitf_OPTIMIZED_MACRO
986 # define gl_signbitf(arg) \
987 ({ union { float _value; \
988 unsigned int _word[_GL_NUM_UINT_WORDS (float)]; \
991 (_m._word[FLT_SIGNBIT_WORD] >> FLT_SIGNBIT_BIT) & 1; \
994 # if defined DBL_SIGNBIT_WORD && defined DBL_SIGNBIT_BIT && !defined gl_signbitd
995 # define gl_signbitd_OPTIMIZED_MACRO
996 # define gl_signbitd(arg) \
997 ({ union { double _value; \
998 unsigned int _word[_GL_NUM_UINT_WORDS (double)]; \
1000 _m._value = (arg); \
1001 (_m._word[DBL_SIGNBIT_WORD] >> DBL_SIGNBIT_BIT) & 1; \
1004 # if defined LDBL_SIGNBIT_WORD && defined LDBL_SIGNBIT_BIT && !defined gl_signbitl
1005 # define gl_signbitl_OPTIMIZED_MACRO
1006 # define gl_signbitl(arg) \
1007 ({ union { long double _value; \
1008 unsigned int _word[_GL_NUM_UINT_WORDS (long double)]; \
1010 _m._value = (arg); \
1011 (_m._word[LDBL_SIGNBIT_WORD] >> LDBL_SIGNBIT_BIT) & 1; \
1015 # define signbit(x) \
1016 (sizeof (x) == sizeof (long double) ? gl_signbitl (x) : \
1017 sizeof (x) == sizeof (double) ? gl_signbitd (x) : \
1020 #elif defined GNULIB_POSIXCHECK
1021 # if defined signbit
1022 _GL_WARN_REAL_FLOATING_DECL (signbit);
1024 # define signbit(x) _GL_WARN_REAL_FLOATING_IMPL (signbit, x)
1029 #endif /* _@GUARD_PREFIX@_MATH_H */
1030 #endif /* _@GUARD_PREFIX@_MATH_H */