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)
114 _GL_FUNCDECL_SYS (acosf, float, (float x));
116 _GL_CXXALIAS_SYS (acosf, float, (float x));
117 _GL_CXXALIASWARN (acosf);
118 #elif defined GNULIB_POSIXCHECK
120 # if HAVE_RAW_DECL_ACOSF
121 _GL_WARN_ON_USE (acosf, "acosf is unportable - "
122 "use gnulib module acosf for portability");
127 # if !@HAVE_ACOSL@ || !@HAVE_DECL_ACOSL@
128 _GL_FUNCDECL_SYS (acosl, long double, (long double x));
130 _GL_CXXALIAS_SYS (acosl, long double, (long double x));
131 _GL_CXXALIASWARN (acosl);
132 #elif defined GNULIB_POSIXCHECK
134 # if HAVE_RAW_DECL_ACOSL
135 _GL_WARN_ON_USE (acosl, "acosl is unportable - "
136 "use gnulib module mathl for portability");
144 _GL_FUNCDECL_SYS (asinf, float, (float x));
146 _GL_CXXALIAS_SYS (asinf, float, (float x));
147 _GL_CXXALIASWARN (asinf);
148 #elif defined GNULIB_POSIXCHECK
150 # if HAVE_RAW_DECL_ASINF
151 _GL_WARN_ON_USE (asinf, "asinf is unportable - "
152 "use gnulib module asinf for portability");
157 # if !@HAVE_ASINL@ || !@HAVE_DECL_ASINL@
158 _GL_FUNCDECL_SYS (asinl, long double, (long double x));
160 _GL_CXXALIAS_SYS (asinl, long double, (long double x));
161 _GL_CXXALIASWARN (asinl);
162 #elif defined GNULIB_POSIXCHECK
164 # if HAVE_RAW_DECL_ASINL
165 _GL_WARN_ON_USE (asinl, "asinl is unportable - "
166 "use gnulib module mathl for portability");
172 # if !@HAVE_ATANL@ || !@HAVE_DECL_ATANL@
173 _GL_FUNCDECL_SYS (atanl, long double, (long double x));
175 _GL_CXXALIAS_SYS (atanl, long double, (long double x));
176 _GL_CXXALIASWARN (atanl);
177 #elif defined GNULIB_POSIXCHECK
179 # if HAVE_RAW_DECL_ATANL
180 _GL_WARN_ON_USE (atanl, "atanl is unportable - "
181 "use gnulib module mathl for portability");
188 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
190 # define ceilf rpl_ceilf
192 _GL_FUNCDECL_RPL (ceilf, float, (float x));
193 _GL_CXXALIAS_RPL (ceilf, float, (float x));
195 # if !@HAVE_DECL_CEILF@
196 _GL_FUNCDECL_SYS (ceilf, float, (float x));
198 _GL_CXXALIAS_SYS (ceilf, float, (float x));
200 _GL_CXXALIASWARN (ceilf);
201 #elif defined GNULIB_POSIXCHECK
203 # if HAVE_RAW_DECL_CEILF
204 _GL_WARN_ON_USE (ceilf, "ceilf is unportable - "
205 "use gnulib module ceilf for portability");
211 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
212 # define ceil rpl_ceil
214 _GL_FUNCDECL_RPL (ceil, double, (double x));
215 _GL_CXXALIAS_RPL (ceil, double, (double x));
217 _GL_CXXALIAS_SYS (ceil, double, (double x));
219 _GL_CXXALIASWARN (ceil);
224 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
226 # define ceill rpl_ceill
228 _GL_FUNCDECL_RPL (ceill, long double, (long double x));
229 _GL_CXXALIAS_RPL (ceill, long double, (long double x));
231 # if !@HAVE_DECL_CEILL@
232 _GL_FUNCDECL_SYS (ceill, long double, (long double x));
234 _GL_CXXALIAS_SYS (ceill, long double, (long double x));
236 _GL_CXXALIASWARN (ceill);
237 #elif defined GNULIB_POSIXCHECK
239 # if HAVE_RAW_DECL_CEILL
240 _GL_WARN_ON_USE (ceill, "ceill is unportable - "
241 "use gnulib module ceill for portability");
249 _GL_FUNCDECL_SYS (cosf, float, (float x));
251 _GL_CXXALIAS_SYS (cosf, float, (float x));
252 _GL_CXXALIASWARN (cosf);
253 #elif defined GNULIB_POSIXCHECK
255 # if HAVE_RAW_DECL_COSF
256 _GL_WARN_ON_USE (cosf, "cosf is unportable - "
257 "use gnulib module cosf for portability");
262 # if !@HAVE_COSL@ || !@HAVE_DECL_COSL@
263 _GL_FUNCDECL_SYS (cosl, long double, (long double x));
265 _GL_CXXALIAS_SYS (cosl, long double, (long double x));
266 _GL_CXXALIASWARN (cosl);
267 #elif defined GNULIB_POSIXCHECK
269 # if HAVE_RAW_DECL_COSL
270 _GL_WARN_ON_USE (cosl, "cosl is unportable - "
271 "use gnulib module mathl for portability");
279 _GL_FUNCDECL_SYS (expf, float, (float x));
281 _GL_CXXALIAS_SYS (expf, float, (float x));
282 _GL_CXXALIASWARN (expf);
283 #elif defined GNULIB_POSIXCHECK
285 # if HAVE_RAW_DECL_EXPF
286 _GL_WARN_ON_USE (expf, "expf is unportable - "
287 "use gnulib module expf for portability");
292 # if !@HAVE_EXPL@ || !@HAVE_DECL_EXPL@
293 _GL_FUNCDECL_SYS (expl, long double, (long double x));
295 _GL_CXXALIAS_SYS (expl, long double, (long double x));
296 _GL_CXXALIASWARN (expl);
297 #elif defined GNULIB_POSIXCHECK
299 # if HAVE_RAW_DECL_EXPL
300 _GL_WARN_ON_USE (expl, "expl is unportable - "
301 "use gnulib module mathl for portability");
309 _GL_FUNCDECL_SYS (fabsf, float, (float x));
311 _GL_CXXALIAS_SYS (fabsf, float, (float x));
312 _GL_CXXALIASWARN (fabsf);
313 #elif defined GNULIB_POSIXCHECK
315 # if HAVE_RAW_DECL_FABSF
316 _GL_WARN_ON_USE (fabsf, "fabsf is unportable - "
317 "use gnulib module fabsf for portability");
323 # if @REPLACE_FLOORF@
324 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
326 # define floorf rpl_floorf
328 _GL_FUNCDECL_RPL (floorf, float, (float x));
329 _GL_CXXALIAS_RPL (floorf, float, (float x));
331 # if !@HAVE_DECL_FLOORF@
332 _GL_FUNCDECL_SYS (floorf, float, (float x));
334 _GL_CXXALIAS_SYS (floorf, float, (float x));
336 _GL_CXXALIASWARN (floorf);
337 #elif defined GNULIB_POSIXCHECK
339 # if HAVE_RAW_DECL_FLOORF
340 _GL_WARN_ON_USE (floorf, "floorf is unportable - "
341 "use gnulib module floorf for portability");
347 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
348 # define floor rpl_floor
350 _GL_FUNCDECL_RPL (floor, double, (double x));
351 _GL_CXXALIAS_RPL (floor, double, (double x));
353 _GL_CXXALIAS_SYS (floor, double, (double x));
355 _GL_CXXALIASWARN (floor);
359 # if @REPLACE_FLOORL@
360 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
362 # define floorl rpl_floorl
364 _GL_FUNCDECL_RPL (floorl, long double, (long double x));
365 _GL_CXXALIAS_RPL (floorl, long double, (long double x));
367 # if !@HAVE_DECL_FLOORL@
368 _GL_FUNCDECL_SYS (floorl, long double, (long double x));
370 _GL_CXXALIAS_SYS (floorl, long double, (long double x));
372 _GL_CXXALIASWARN (floorl);
373 #elif defined GNULIB_POSIXCHECK
375 # if HAVE_RAW_DECL_FLOORL
376 _GL_WARN_ON_USE (floorl, "floorl is unportable - "
377 "use gnulib module floorl for portability");
385 _GL_FUNCDECL_SYS (fmodf, float, (float x, float y));
387 _GL_CXXALIAS_SYS (fmodf, float, (float x, float y));
388 _GL_CXXALIASWARN (fmodf);
389 #elif defined GNULIB_POSIXCHECK
391 # if HAVE_RAW_DECL_FMODF
392 _GL_WARN_ON_USE (fmodf, "fmodf is unportable - "
393 "use gnulib module fmodf for portability");
401 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
402 If x is zero: mantissa = x, exp = 0.
403 If x is infinite or NaN: mantissa = x, exp unspecified.
404 Store exp in *EXPPTR and return mantissa. */
406 # if @REPLACE_FREXPF@
407 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
409 # define frexpf rpl_frexpf
411 _GL_FUNCDECL_RPL (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
412 _GL_CXXALIAS_RPL (frexpf, float, (float x, int *expptr));
416 _GL_FUNCDECL_SYS (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
418 _GL_CXXALIAS_SYS (frexpf, float, (float x, int *expptr));
420 _GL_CXXALIASWARN (frexpf);
421 #elif defined GNULIB_POSIXCHECK
423 # if HAVE_RAW_DECL_FREXPF
424 _GL_WARN_ON_USE (frexpf, "frexpf is unportable - "
425 "use gnulib module frexpf for portability");
432 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
433 If x is zero: mantissa = x, exp = 0.
434 If x is infinite or NaN: mantissa = x, exp unspecified.
435 Store exp in *EXPPTR and return mantissa. */
438 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
439 # define frexp rpl_frexp
441 _GL_FUNCDECL_RPL (frexp, double, (double x, int *expptr) _GL_ARG_NONNULL ((2)));
442 _GL_CXXALIAS_RPL (frexp, double, (double x, int *expptr));
444 _GL_CXXALIAS_SYS (frexp, double, (double x, int *expptr));
446 _GL_CXXALIASWARN (frexp);
447 #elif defined GNULIB_POSIXCHECK
449 /* Assume frexp is always declared. */
450 _GL_WARN_ON_USE (frexp, "frexp is unportable - "
451 "use gnulib module frexp for portability");
457 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
458 If x is zero: mantissa = x, exp = 0.
459 If x is infinite or NaN: mantissa = x, exp unspecified.
460 Store exp in *EXPPTR and return mantissa. */
461 #if @GNULIB_FREXPL@ && @REPLACE_FREXPL@
462 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
464 # define frexpl rpl_frexpl
466 _GL_FUNCDECL_RPL (frexpl, long double,
467 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
468 _GL_CXXALIAS_RPL (frexpl, long double, (long double x, int *expptr));
470 # if !@HAVE_DECL_FREXPL@
471 _GL_FUNCDECL_SYS (frexpl, long double,
472 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
475 _GL_CXXALIAS_SYS (frexpl, long double, (long double x, int *expptr));
478 #if @GNULIB_FREXPL@ && !(@REPLACE_FREXPL@ && !@HAVE_DECL_FREXPL@)
479 _GL_CXXALIASWARN (frexpl);
481 #if !@GNULIB_FREXPL@ && defined GNULIB_POSIXCHECK
483 # if HAVE_RAW_DECL_FREXPL
484 _GL_WARN_ON_USE (frexpl, "frexpl is unportable - "
485 "use gnulib module frexpl for portability");
490 /* Return x * 2^exp. */
494 _GL_FUNCDECL_SYS (ldexpf, float, (float x, int exp));
496 _GL_CXXALIAS_SYS (ldexpf, float, (float x, int exp));
497 _GL_CXXALIASWARN (ldexpf);
498 #elif defined GNULIB_POSIXCHECK
500 # if HAVE_RAW_DECL_LDEXPF
501 _GL_WARN_ON_USE (ldexpf, "ldexpf is unportable - "
502 "use gnulib module ldexpf for portability");
506 /* Return x * 2^exp. */
507 #if @GNULIB_LDEXPL@ && @REPLACE_LDEXPL@
508 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
510 # define ldexpl rpl_ldexpl
512 _GL_FUNCDECL_RPL (ldexpl, long double, (long double x, int exp));
513 _GL_CXXALIAS_RPL (ldexpl, long double, (long double x, int exp));
515 # if !@HAVE_DECL_LDEXPL@
516 _GL_FUNCDECL_SYS (ldexpl, long double, (long double x, int exp));
519 _GL_CXXALIAS_SYS (ldexpl, long double, (long double x, int exp));
523 _GL_CXXALIASWARN (ldexpl);
525 #if !@GNULIB_LDEXPL@ && defined GNULIB_POSIXCHECK
527 # if HAVE_RAW_DECL_LDEXPL
528 _GL_WARN_ON_USE (ldexpl, "ldexpl is unportable - "
529 "use gnulib module ldexpl for portability");
535 # if !@HAVE_DECL_LOGB@
536 _GL_EXTERN_C double logb (double x);
538 #elif defined GNULIB_POSIXCHECK
540 # if HAVE_RAW_DECL_LOGB
541 _GL_WARN_ON_USE (logb, "logb is unportable - "
542 "use gnulib module logb for portability");
550 _GL_FUNCDECL_SYS (logf, float, (float x));
552 _GL_CXXALIAS_SYS (logf, float, (float x));
553 _GL_CXXALIASWARN (logf);
554 #elif defined GNULIB_POSIXCHECK
556 # if HAVE_RAW_DECL_LOGF
557 _GL_WARN_ON_USE (logf, "logf is unportable - "
558 "use gnulib module logf for portability");
563 # if !@HAVE_LOGL@ || !@HAVE_DECL_LOGL@
564 _GL_FUNCDECL_SYS (logl, long double, (long double x));
566 _GL_CXXALIAS_SYS (logl, long double, (long double x));
567 _GL_CXXALIASWARN (logl);
568 #elif defined GNULIB_POSIXCHECK
570 # if HAVE_RAW_DECL_LOGL
571 _GL_WARN_ON_USE (logl, "logl is unportable - "
572 "use gnulib module mathl for portability");
580 _GL_FUNCDECL_SYS (log10f, float, (float x));
582 _GL_CXXALIAS_SYS (log10f, float, (float x));
583 _GL_CXXALIASWARN (log10f);
584 #elif defined GNULIB_POSIXCHECK
586 # if HAVE_RAW_DECL_LOG10F
587 _GL_WARN_ON_USE (log10f, "log10f is unportable - "
588 "use gnulib module log10f for portability");
596 _GL_FUNCDECL_SYS (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
598 _GL_CXXALIAS_SYS (modff, float, (float x, float *iptr));
599 _GL_CXXALIASWARN (modff);
600 #elif defined GNULIB_POSIXCHECK
602 # if HAVE_RAW_DECL_MODFF
603 _GL_WARN_ON_USE (modff, "modff is unportable - "
604 "use gnulib module modff for portability");
612 _GL_FUNCDECL_SYS (powf, float, (float x, float y));
614 _GL_CXXALIAS_SYS (powf, float, (float x, float y));
615 _GL_CXXALIASWARN (powf);
616 #elif defined GNULIB_POSIXCHECK
618 # if HAVE_RAW_DECL_POWF
619 _GL_WARN_ON_USE (powf, "powf is unportable - "
620 "use gnulib module powf for portability");
626 # if @REPLACE_ROUNDF@
627 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
629 # define roundf rpl_roundf
631 _GL_FUNCDECL_RPL (roundf, float, (float x));
632 _GL_CXXALIAS_RPL (roundf, float, (float x));
634 # if !@HAVE_DECL_ROUNDF@
635 _GL_FUNCDECL_SYS (roundf, float, (float x));
637 _GL_CXXALIAS_SYS (roundf, float, (float x));
639 _GL_CXXALIASWARN (roundf);
640 #elif defined GNULIB_POSIXCHECK
642 # if HAVE_RAW_DECL_ROUNDF
643 _GL_WARN_ON_USE (roundf, "roundf is unportable - "
644 "use gnulib module roundf for portability");
650 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
652 # define round rpl_round
654 _GL_FUNCDECL_RPL (round, double, (double x));
655 _GL_CXXALIAS_RPL (round, double, (double x));
657 # if !@HAVE_DECL_ROUND@
658 _GL_FUNCDECL_SYS (round, double, (double x));
660 _GL_CXXALIAS_SYS (round, double, (double x));
662 _GL_CXXALIASWARN (round);
663 #elif defined GNULIB_POSIXCHECK
665 # if HAVE_RAW_DECL_ROUND
666 _GL_WARN_ON_USE (round, "round is unportable - "
667 "use gnulib module round for portability");
672 # if @REPLACE_ROUNDL@
673 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
675 # define roundl rpl_roundl
677 _GL_FUNCDECL_RPL (roundl, long double, (long double x));
678 _GL_CXXALIAS_RPL (roundl, long double, (long double x));
680 # if !@HAVE_DECL_ROUNDL@
681 _GL_FUNCDECL_SYS (roundl, long double, (long double x));
683 _GL_CXXALIAS_SYS (roundl, long double, (long double x));
685 _GL_CXXALIASWARN (roundl);
686 #elif defined GNULIB_POSIXCHECK
688 # if HAVE_RAW_DECL_ROUNDL
689 _GL_WARN_ON_USE (roundl, "roundl is unportable - "
690 "use gnulib module roundl for portability");
698 _GL_FUNCDECL_SYS (sinf, float, (float x));
700 _GL_CXXALIAS_SYS (sinf, float, (float x));
701 _GL_CXXALIASWARN (sinf);
702 #elif defined GNULIB_POSIXCHECK
704 # if HAVE_RAW_DECL_SINF
705 _GL_WARN_ON_USE (sinf, "sinf is unportable - "
706 "use gnulib module sinf for portability");
711 # if !@HAVE_SINL@ || !@HAVE_DECL_SINL@
712 _GL_FUNCDECL_SYS (sinl, long double, (long double x));
714 _GL_CXXALIAS_SYS (sinl, long double, (long double x));
715 _GL_CXXALIASWARN (sinl);
716 #elif defined GNULIB_POSIXCHECK
718 # if HAVE_RAW_DECL_SINL
719 _GL_WARN_ON_USE (sinl, "sinl is unportable - "
720 "use gnulib module mathl for portability");
728 _GL_FUNCDECL_SYS (sqrtf, float, (float x));
730 _GL_CXXALIAS_SYS (sqrtf, float, (float x));
731 _GL_CXXALIASWARN (sqrtf);
732 #elif defined GNULIB_POSIXCHECK
734 # if HAVE_RAW_DECL_SQRTF
735 _GL_WARN_ON_USE (sqrtf, "sqrtf is unportable - "
736 "use gnulib module sqrtf for portability");
741 # if !@HAVE_SQRTL@ || !@HAVE_DECL_SQRTL@
742 _GL_FUNCDECL_SYS (sqrtl, long double, (long double x));
744 _GL_CXXALIAS_SYS (sqrtl, long double, (long double x));
745 _GL_CXXALIASWARN (sqrtl);
746 #elif defined GNULIB_POSIXCHECK
748 # if HAVE_RAW_DECL_SQRTL
749 _GL_WARN_ON_USE (sqrtl, "sqrtl is unportable - "
750 "use gnulib module mathl for portability");
758 _GL_FUNCDECL_SYS (tanf, float, (float x));
760 _GL_CXXALIAS_SYS (tanf, float, (float x));
761 _GL_CXXALIASWARN (tanf);
762 #elif defined GNULIB_POSIXCHECK
764 # if HAVE_RAW_DECL_TANF
765 _GL_WARN_ON_USE (tanf, "tanf is unportable - "
766 "use gnulib module tanf for portability");
771 # if !@HAVE_TANL@ || !@HAVE_DECL_TANL@
772 _GL_FUNCDECL_SYS (tanl, long double, (long double x));
774 _GL_CXXALIAS_SYS (tanl, long double, (long double x));
775 _GL_CXXALIASWARN (tanl);
776 #elif defined GNULIB_POSIXCHECK
778 # if HAVE_RAW_DECL_TANL
779 _GL_WARN_ON_USE (tanl, "tanl is unportable - "
780 "use gnulib module mathl for portability");
786 # if @REPLACE_TRUNCF@
787 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
788 # define truncf rpl_truncf
790 _GL_FUNCDECL_RPL (truncf, float, (float x));
791 _GL_CXXALIAS_RPL (truncf, float, (float x));
793 # if !@HAVE_DECL_TRUNCF@
794 _GL_FUNCDECL_SYS (truncf, float, (float x));
796 _GL_CXXALIAS_SYS (truncf, float, (float x));
798 _GL_CXXALIASWARN (truncf);
799 #elif defined GNULIB_POSIXCHECK
801 # if HAVE_RAW_DECL_TRUNCF
802 _GL_WARN_ON_USE (truncf, "truncf is unportable - "
803 "use gnulib module truncf for portability");
809 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
810 # define trunc rpl_trunc
812 _GL_FUNCDECL_RPL (trunc, double, (double x));
813 _GL_CXXALIAS_RPL (trunc, double, (double x));
815 # if !@HAVE_DECL_TRUNC@
816 _GL_FUNCDECL_SYS (trunc, double, (double x));
818 _GL_CXXALIAS_SYS (trunc, double, (double x));
820 _GL_CXXALIASWARN (trunc);
821 #elif defined GNULIB_POSIXCHECK
823 # if HAVE_RAW_DECL_TRUNC
824 _GL_WARN_ON_USE (trunc, "trunc is unportable - "
825 "use gnulib module trunc for portability");
830 # if @REPLACE_TRUNCL@
831 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
833 # define truncl rpl_truncl
835 _GL_FUNCDECL_RPL (truncl, long double, (long double x));
836 _GL_CXXALIAS_RPL (truncl, long double, (long double x));
838 # if !@HAVE_DECL_TRUNCL@
839 _GL_FUNCDECL_SYS (truncl, long double, (long double x));
841 _GL_CXXALIAS_SYS (truncl, long double, (long double x));
843 _GL_CXXALIASWARN (truncl);
844 #elif defined GNULIB_POSIXCHECK
846 # if HAVE_RAW_DECL_TRUNCL
847 _GL_WARN_ON_USE (truncl, "truncl is unportable - "
848 "use gnulib module truncl for portability");
853 /* Definitions of function-like macros come here, after the function
857 #if @GNULIB_ISFINITE@
858 # if @REPLACE_ISFINITE@
859 _GL_EXTERN_C int gl_isfinitef (float x);
860 _GL_EXTERN_C int gl_isfinited (double x);
861 _GL_EXTERN_C int gl_isfinitel (long double x);
863 # define isfinite(x) \
864 (sizeof (x) == sizeof (long double) ? gl_isfinitel (x) : \
865 sizeof (x) == sizeof (double) ? gl_isfinited (x) : \
868 #elif defined GNULIB_POSIXCHECK
869 # if defined isfinite
870 _GL_WARN_REAL_FLOATING_DECL (isfinite);
872 # define isfinite(x) _GL_WARN_REAL_FLOATING_IMPL (isfinite, x)
879 _GL_EXTERN_C int gl_isinff (float x);
880 _GL_EXTERN_C int gl_isinfd (double x);
881 _GL_EXTERN_C int gl_isinfl (long double x);
884 (sizeof (x) == sizeof (long double) ? gl_isinfl (x) : \
885 sizeof (x) == sizeof (double) ? gl_isinfd (x) : \
888 #elif defined GNULIB_POSIXCHECK
890 _GL_WARN_REAL_FLOATING_DECL (isinf);
892 # define isinf(x) _GL_WARN_REAL_FLOATING_IMPL (isinf, x)
898 /* Test for NaN for 'float' numbers. */
900 /* The original <math.h> included above provides a declaration of isnan macro
901 or (older) isnanf function. */
903 /* GCC 4.0 and newer provides three built-ins for isnan. */
905 # define isnanf(x) __builtin_isnanf ((float)(x))
908 # define isnanf(x) isnan ((float)(x))
911 /* Test whether X is a NaN. */
913 # define isnanf rpl_isnanf
914 _GL_EXTERN_C int isnanf (float x);
919 /* Test for NaN for 'double' numbers.
920 This function is a gnulib extension, unlike isnan() which applied only
921 to 'double' numbers earlier but now is a type-generic macro. */
923 /* The original <math.h> included above provides a declaration of isnan
926 /* GCC 4.0 and newer provides three built-ins for isnan. */
928 # define isnand(x) __builtin_isnan ((double)(x))
931 # define isnand(x) isnan ((double)(x))
934 /* Test whether X is a NaN. */
936 # define isnand rpl_isnand
937 _GL_EXTERN_C int isnand (double x);
942 /* Test for NaN for 'long double' numbers. */
944 /* The original <math.h> included above provides a declaration of isnan
945 macro or (older) isnanl function. */
947 /* GCC 4.0 and newer provides three built-ins for isnan. */
949 # define isnanl(x) __builtin_isnanl ((long double)(x))
952 # define isnanl(x) isnan ((long double)(x))
955 /* Test whether X is a NaN. */
957 # define isnanl rpl_isnanl
958 _GL_EXTERN_C int isnanl (long double x);
962 /* This must come *after* the snippets for GNULIB_ISNANF and GNULIB_ISNANL! */
965 /* We can't just use the isnanf macro (e.g.) as exposed by
966 isnanf.h (e.g.) here, because those may end up being macros
967 that recursively expand back to isnan. So use the gnulib
968 replacements for them directly. */
969 # if @HAVE_ISNANF@ && __GNUC__ >= 4
970 # define gl_isnan_f(x) __builtin_isnanf ((float)(x))
972 _GL_EXTERN_C int rpl_isnanf (float x);
973 # define gl_isnan_f(x) rpl_isnanf (x)
975 # if @HAVE_ISNAND@ && __GNUC__ >= 4
976 # define gl_isnan_d(x) __builtin_isnan ((double)(x))
978 _GL_EXTERN_C int rpl_isnand (double x);
979 # define gl_isnan_d(x) rpl_isnand (x)
981 # if @HAVE_ISNANL@ && __GNUC__ >= 4
982 # define gl_isnan_l(x) __builtin_isnanl ((long double)(x))
984 _GL_EXTERN_C int rpl_isnanl (long double x);
985 # define gl_isnan_l(x) rpl_isnanl (x)
989 (sizeof (x) == sizeof (long double) ? gl_isnan_l (x) : \
990 sizeof (x) == sizeof (double) ? gl_isnan_d (x) : \
995 (sizeof (x) == sizeof (long double) ? __builtin_isnanl ((long double)(x)) : \
996 sizeof (x) == sizeof (double) ? __builtin_isnan ((double)(x)) : \
997 __builtin_isnanf ((float)(x)))
999 /* Ensure isnan is a macro. */
1001 # define isnan isnan
1003 #elif defined GNULIB_POSIXCHECK
1005 _GL_WARN_REAL_FLOATING_DECL (isnan);
1007 # define isnan(x) _GL_WARN_REAL_FLOATING_IMPL (isnan, x)
1012 #if @GNULIB_SIGNBIT@
1013 # if @REPLACE_SIGNBIT_USING_GCC@
1015 /* GCC 4.0 and newer provides three built-ins for signbit. */
1016 # define signbit(x) \
1017 (sizeof (x) == sizeof (long double) ? __builtin_signbitl (x) : \
1018 sizeof (x) == sizeof (double) ? __builtin_signbit (x) : \
1019 __builtin_signbitf (x))
1021 # if @REPLACE_SIGNBIT@
1023 _GL_EXTERN_C int gl_signbitf (float arg);
1024 _GL_EXTERN_C int gl_signbitd (double arg);
1025 _GL_EXTERN_C int gl_signbitl (long double arg);
1026 # if __GNUC__ >= 2 && !__STRICT_ANSI__
1027 # define _GL_NUM_UINT_WORDS(type) \
1028 ((sizeof (type) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
1029 # if defined FLT_SIGNBIT_WORD && defined FLT_SIGNBIT_BIT && !defined gl_signbitf
1030 # define gl_signbitf_OPTIMIZED_MACRO
1031 # define gl_signbitf(arg) \
1032 ({ union { float _value; \
1033 unsigned int _word[_GL_NUM_UINT_WORDS (float)]; \
1035 _m._value = (arg); \
1036 (_m._word[FLT_SIGNBIT_WORD] >> FLT_SIGNBIT_BIT) & 1; \
1039 # if defined DBL_SIGNBIT_WORD && defined DBL_SIGNBIT_BIT && !defined gl_signbitd
1040 # define gl_signbitd_OPTIMIZED_MACRO
1041 # define gl_signbitd(arg) \
1042 ({ union { double _value; \
1043 unsigned int _word[_GL_NUM_UINT_WORDS (double)]; \
1045 _m._value = (arg); \
1046 (_m._word[DBL_SIGNBIT_WORD] >> DBL_SIGNBIT_BIT) & 1; \
1049 # if defined LDBL_SIGNBIT_WORD && defined LDBL_SIGNBIT_BIT && !defined gl_signbitl
1050 # define gl_signbitl_OPTIMIZED_MACRO
1051 # define gl_signbitl(arg) \
1052 ({ union { long double _value; \
1053 unsigned int _word[_GL_NUM_UINT_WORDS (long double)]; \
1055 _m._value = (arg); \
1056 (_m._word[LDBL_SIGNBIT_WORD] >> LDBL_SIGNBIT_BIT) & 1; \
1060 # define signbit(x) \
1061 (sizeof (x) == sizeof (long double) ? gl_signbitl (x) : \
1062 sizeof (x) == sizeof (double) ? gl_signbitd (x) : \
1065 #elif defined GNULIB_POSIXCHECK
1066 # if defined signbit
1067 _GL_WARN_REAL_FLOATING_DECL (signbit);
1069 # define signbit(x) _GL_WARN_REAL_FLOATING_IMPL (signbit, x)
1074 #endif /* _@GUARD_PREFIX@_MATH_H */
1075 #endif /* _@GUARD_PREFIX@_MATH_H */