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");
174 _GL_FUNCDECL_SYS (atanf, float, (float x));
176 _GL_CXXALIAS_SYS (atanf, float, (float x));
177 _GL_CXXALIASWARN (atanf);
178 #elif defined GNULIB_POSIXCHECK
180 # if HAVE_RAW_DECL_ATANF
181 _GL_WARN_ON_USE (atanf, "atanf is unportable - "
182 "use gnulib module atanf for portability");
187 # if !@HAVE_ATANL@ || !@HAVE_DECL_ATANL@
188 _GL_FUNCDECL_SYS (atanl, long double, (long double x));
190 _GL_CXXALIAS_SYS (atanl, long double, (long double x));
191 _GL_CXXALIASWARN (atanl);
192 #elif defined GNULIB_POSIXCHECK
194 # if HAVE_RAW_DECL_ATANL
195 _GL_WARN_ON_USE (atanl, "atanl is unportable - "
196 "use gnulib module mathl for portability");
203 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
205 # define ceilf rpl_ceilf
207 _GL_FUNCDECL_RPL (ceilf, float, (float x));
208 _GL_CXXALIAS_RPL (ceilf, float, (float x));
210 # if !@HAVE_DECL_CEILF@
211 _GL_FUNCDECL_SYS (ceilf, float, (float x));
213 _GL_CXXALIAS_SYS (ceilf, float, (float x));
215 _GL_CXXALIASWARN (ceilf);
216 #elif defined GNULIB_POSIXCHECK
218 # if HAVE_RAW_DECL_CEILF
219 _GL_WARN_ON_USE (ceilf, "ceilf is unportable - "
220 "use gnulib module ceilf for portability");
226 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
227 # define ceil rpl_ceil
229 _GL_FUNCDECL_RPL (ceil, double, (double x));
230 _GL_CXXALIAS_RPL (ceil, double, (double x));
232 _GL_CXXALIAS_SYS (ceil, double, (double x));
234 _GL_CXXALIASWARN (ceil);
239 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
241 # define ceill rpl_ceill
243 _GL_FUNCDECL_RPL (ceill, long double, (long double x));
244 _GL_CXXALIAS_RPL (ceill, long double, (long double x));
246 # if !@HAVE_DECL_CEILL@
247 _GL_FUNCDECL_SYS (ceill, long double, (long double x));
249 _GL_CXXALIAS_SYS (ceill, long double, (long double x));
251 _GL_CXXALIASWARN (ceill);
252 #elif defined GNULIB_POSIXCHECK
254 # if HAVE_RAW_DECL_CEILL
255 _GL_WARN_ON_USE (ceill, "ceill is unportable - "
256 "use gnulib module ceill for portability");
264 _GL_FUNCDECL_SYS (cosf, float, (float x));
266 _GL_CXXALIAS_SYS (cosf, float, (float x));
267 _GL_CXXALIASWARN (cosf);
268 #elif defined GNULIB_POSIXCHECK
270 # if HAVE_RAW_DECL_COSF
271 _GL_WARN_ON_USE (cosf, "cosf is unportable - "
272 "use gnulib module cosf for portability");
277 # if !@HAVE_COSL@ || !@HAVE_DECL_COSL@
278 _GL_FUNCDECL_SYS (cosl, long double, (long double x));
280 _GL_CXXALIAS_SYS (cosl, long double, (long double x));
281 _GL_CXXALIASWARN (cosl);
282 #elif defined GNULIB_POSIXCHECK
284 # if HAVE_RAW_DECL_COSL
285 _GL_WARN_ON_USE (cosl, "cosl is unportable - "
286 "use gnulib module mathl for portability");
294 _GL_FUNCDECL_SYS (expf, float, (float x));
296 _GL_CXXALIAS_SYS (expf, float, (float x));
297 _GL_CXXALIASWARN (expf);
298 #elif defined GNULIB_POSIXCHECK
300 # if HAVE_RAW_DECL_EXPF
301 _GL_WARN_ON_USE (expf, "expf is unportable - "
302 "use gnulib module expf for portability");
307 # if !@HAVE_EXPL@ || !@HAVE_DECL_EXPL@
308 _GL_FUNCDECL_SYS (expl, long double, (long double x));
310 _GL_CXXALIAS_SYS (expl, long double, (long double x));
311 _GL_CXXALIASWARN (expl);
312 #elif defined GNULIB_POSIXCHECK
314 # if HAVE_RAW_DECL_EXPL
315 _GL_WARN_ON_USE (expl, "expl is unportable - "
316 "use gnulib module mathl for portability");
324 _GL_FUNCDECL_SYS (fabsf, float, (float x));
326 _GL_CXXALIAS_SYS (fabsf, float, (float x));
327 _GL_CXXALIASWARN (fabsf);
328 #elif defined GNULIB_POSIXCHECK
330 # if HAVE_RAW_DECL_FABSF
331 _GL_WARN_ON_USE (fabsf, "fabsf is unportable - "
332 "use gnulib module fabsf for portability");
338 # if @REPLACE_FLOORF@
339 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
341 # define floorf rpl_floorf
343 _GL_FUNCDECL_RPL (floorf, float, (float x));
344 _GL_CXXALIAS_RPL (floorf, float, (float x));
346 # if !@HAVE_DECL_FLOORF@
347 _GL_FUNCDECL_SYS (floorf, float, (float x));
349 _GL_CXXALIAS_SYS (floorf, float, (float x));
351 _GL_CXXALIASWARN (floorf);
352 #elif defined GNULIB_POSIXCHECK
354 # if HAVE_RAW_DECL_FLOORF
355 _GL_WARN_ON_USE (floorf, "floorf is unportable - "
356 "use gnulib module floorf for portability");
362 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
363 # define floor rpl_floor
365 _GL_FUNCDECL_RPL (floor, double, (double x));
366 _GL_CXXALIAS_RPL (floor, double, (double x));
368 _GL_CXXALIAS_SYS (floor, double, (double x));
370 _GL_CXXALIASWARN (floor);
374 # if @REPLACE_FLOORL@
375 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
377 # define floorl rpl_floorl
379 _GL_FUNCDECL_RPL (floorl, long double, (long double x));
380 _GL_CXXALIAS_RPL (floorl, long double, (long double x));
382 # if !@HAVE_DECL_FLOORL@
383 _GL_FUNCDECL_SYS (floorl, long double, (long double x));
385 _GL_CXXALIAS_SYS (floorl, long double, (long double x));
387 _GL_CXXALIASWARN (floorl);
388 #elif defined GNULIB_POSIXCHECK
390 # if HAVE_RAW_DECL_FLOORL
391 _GL_WARN_ON_USE (floorl, "floorl is unportable - "
392 "use gnulib module floorl for portability");
400 _GL_FUNCDECL_SYS (fmodf, float, (float x, float y));
402 _GL_CXXALIAS_SYS (fmodf, float, (float x, float y));
403 _GL_CXXALIASWARN (fmodf);
404 #elif defined GNULIB_POSIXCHECK
406 # if HAVE_RAW_DECL_FMODF
407 _GL_WARN_ON_USE (fmodf, "fmodf is unportable - "
408 "use gnulib module fmodf for portability");
416 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
417 If x is zero: mantissa = x, exp = 0.
418 If x is infinite or NaN: mantissa = x, exp unspecified.
419 Store exp in *EXPPTR and return mantissa. */
421 # if @REPLACE_FREXPF@
422 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
424 # define frexpf rpl_frexpf
426 _GL_FUNCDECL_RPL (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
427 _GL_CXXALIAS_RPL (frexpf, float, (float x, int *expptr));
431 _GL_FUNCDECL_SYS (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
433 _GL_CXXALIAS_SYS (frexpf, float, (float x, int *expptr));
435 _GL_CXXALIASWARN (frexpf);
436 #elif defined GNULIB_POSIXCHECK
438 # if HAVE_RAW_DECL_FREXPF
439 _GL_WARN_ON_USE (frexpf, "frexpf is unportable - "
440 "use gnulib module frexpf for portability");
447 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
448 If x is zero: mantissa = x, exp = 0.
449 If x is infinite or NaN: mantissa = x, exp unspecified.
450 Store exp in *EXPPTR and return mantissa. */
453 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
454 # define frexp rpl_frexp
456 _GL_FUNCDECL_RPL (frexp, double, (double x, int *expptr) _GL_ARG_NONNULL ((2)));
457 _GL_CXXALIAS_RPL (frexp, double, (double x, int *expptr));
459 _GL_CXXALIAS_SYS (frexp, double, (double x, int *expptr));
461 _GL_CXXALIASWARN (frexp);
462 #elif defined GNULIB_POSIXCHECK
464 /* Assume frexp is always declared. */
465 _GL_WARN_ON_USE (frexp, "frexp is unportable - "
466 "use gnulib module frexp for portability");
472 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
473 If x is zero: mantissa = x, exp = 0.
474 If x is infinite or NaN: mantissa = x, exp unspecified.
475 Store exp in *EXPPTR and return mantissa. */
476 #if @GNULIB_FREXPL@ && @REPLACE_FREXPL@
477 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
479 # define frexpl rpl_frexpl
481 _GL_FUNCDECL_RPL (frexpl, long double,
482 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
483 _GL_CXXALIAS_RPL (frexpl, long double, (long double x, int *expptr));
485 # if !@HAVE_DECL_FREXPL@
486 _GL_FUNCDECL_SYS (frexpl, long double,
487 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
490 _GL_CXXALIAS_SYS (frexpl, long double, (long double x, int *expptr));
493 #if @GNULIB_FREXPL@ && !(@REPLACE_FREXPL@ && !@HAVE_DECL_FREXPL@)
494 _GL_CXXALIASWARN (frexpl);
496 #if !@GNULIB_FREXPL@ && defined GNULIB_POSIXCHECK
498 # if HAVE_RAW_DECL_FREXPL
499 _GL_WARN_ON_USE (frexpl, "frexpl is unportable - "
500 "use gnulib module frexpl for portability");
505 /* Return x * 2^exp. */
509 _GL_FUNCDECL_SYS (ldexpf, float, (float x, int exp));
511 _GL_CXXALIAS_SYS (ldexpf, float, (float x, int exp));
512 _GL_CXXALIASWARN (ldexpf);
513 #elif defined GNULIB_POSIXCHECK
515 # if HAVE_RAW_DECL_LDEXPF
516 _GL_WARN_ON_USE (ldexpf, "ldexpf is unportable - "
517 "use gnulib module ldexpf for portability");
521 /* Return x * 2^exp. */
522 #if @GNULIB_LDEXPL@ && @REPLACE_LDEXPL@
523 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
525 # define ldexpl rpl_ldexpl
527 _GL_FUNCDECL_RPL (ldexpl, long double, (long double x, int exp));
528 _GL_CXXALIAS_RPL (ldexpl, long double, (long double x, int exp));
530 # if !@HAVE_DECL_LDEXPL@
531 _GL_FUNCDECL_SYS (ldexpl, long double, (long double x, int exp));
534 _GL_CXXALIAS_SYS (ldexpl, long double, (long double x, int exp));
538 _GL_CXXALIASWARN (ldexpl);
540 #if !@GNULIB_LDEXPL@ && defined GNULIB_POSIXCHECK
542 # if HAVE_RAW_DECL_LDEXPL
543 _GL_WARN_ON_USE (ldexpl, "ldexpl is unportable - "
544 "use gnulib module ldexpl for portability");
550 # if !@HAVE_DECL_LOGB@
551 _GL_EXTERN_C double logb (double x);
553 #elif defined GNULIB_POSIXCHECK
555 # if HAVE_RAW_DECL_LOGB
556 _GL_WARN_ON_USE (logb, "logb is unportable - "
557 "use gnulib module logb for portability");
565 _GL_FUNCDECL_SYS (logf, float, (float x));
567 _GL_CXXALIAS_SYS (logf, float, (float x));
568 _GL_CXXALIASWARN (logf);
569 #elif defined GNULIB_POSIXCHECK
571 # if HAVE_RAW_DECL_LOGF
572 _GL_WARN_ON_USE (logf, "logf is unportable - "
573 "use gnulib module logf for portability");
578 # if !@HAVE_LOGL@ || !@HAVE_DECL_LOGL@
579 _GL_FUNCDECL_SYS (logl, long double, (long double x));
581 _GL_CXXALIAS_SYS (logl, long double, (long double x));
582 _GL_CXXALIASWARN (logl);
583 #elif defined GNULIB_POSIXCHECK
585 # if HAVE_RAW_DECL_LOGL
586 _GL_WARN_ON_USE (logl, "logl is unportable - "
587 "use gnulib module mathl for portability");
595 _GL_FUNCDECL_SYS (log10f, float, (float x));
597 _GL_CXXALIAS_SYS (log10f, float, (float x));
598 _GL_CXXALIASWARN (log10f);
599 #elif defined GNULIB_POSIXCHECK
601 # if HAVE_RAW_DECL_LOG10F
602 _GL_WARN_ON_USE (log10f, "log10f is unportable - "
603 "use gnulib module log10f for portability");
611 _GL_FUNCDECL_SYS (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
613 _GL_CXXALIAS_SYS (modff, float, (float x, float *iptr));
614 _GL_CXXALIASWARN (modff);
615 #elif defined GNULIB_POSIXCHECK
617 # if HAVE_RAW_DECL_MODFF
618 _GL_WARN_ON_USE (modff, "modff is unportable - "
619 "use gnulib module modff for portability");
627 _GL_FUNCDECL_SYS (powf, float, (float x, float y));
629 _GL_CXXALIAS_SYS (powf, float, (float x, float y));
630 _GL_CXXALIASWARN (powf);
631 #elif defined GNULIB_POSIXCHECK
633 # if HAVE_RAW_DECL_POWF
634 _GL_WARN_ON_USE (powf, "powf is unportable - "
635 "use gnulib module powf for portability");
641 # if @REPLACE_ROUNDF@
642 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
644 # define roundf rpl_roundf
646 _GL_FUNCDECL_RPL (roundf, float, (float x));
647 _GL_CXXALIAS_RPL (roundf, float, (float x));
649 # if !@HAVE_DECL_ROUNDF@
650 _GL_FUNCDECL_SYS (roundf, float, (float x));
652 _GL_CXXALIAS_SYS (roundf, float, (float x));
654 _GL_CXXALIASWARN (roundf);
655 #elif defined GNULIB_POSIXCHECK
657 # if HAVE_RAW_DECL_ROUNDF
658 _GL_WARN_ON_USE (roundf, "roundf is unportable - "
659 "use gnulib module roundf for portability");
665 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
667 # define round rpl_round
669 _GL_FUNCDECL_RPL (round, double, (double x));
670 _GL_CXXALIAS_RPL (round, double, (double x));
672 # if !@HAVE_DECL_ROUND@
673 _GL_FUNCDECL_SYS (round, double, (double x));
675 _GL_CXXALIAS_SYS (round, double, (double x));
677 _GL_CXXALIASWARN (round);
678 #elif defined GNULIB_POSIXCHECK
680 # if HAVE_RAW_DECL_ROUND
681 _GL_WARN_ON_USE (round, "round is unportable - "
682 "use gnulib module round for portability");
687 # if @REPLACE_ROUNDL@
688 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
690 # define roundl rpl_roundl
692 _GL_FUNCDECL_RPL (roundl, long double, (long double x));
693 _GL_CXXALIAS_RPL (roundl, long double, (long double x));
695 # if !@HAVE_DECL_ROUNDL@
696 _GL_FUNCDECL_SYS (roundl, long double, (long double x));
698 _GL_CXXALIAS_SYS (roundl, long double, (long double x));
700 _GL_CXXALIASWARN (roundl);
701 #elif defined GNULIB_POSIXCHECK
703 # if HAVE_RAW_DECL_ROUNDL
704 _GL_WARN_ON_USE (roundl, "roundl is unportable - "
705 "use gnulib module roundl for portability");
713 _GL_FUNCDECL_SYS (sinf, float, (float x));
715 _GL_CXXALIAS_SYS (sinf, float, (float x));
716 _GL_CXXALIASWARN (sinf);
717 #elif defined GNULIB_POSIXCHECK
719 # if HAVE_RAW_DECL_SINF
720 _GL_WARN_ON_USE (sinf, "sinf is unportable - "
721 "use gnulib module sinf for portability");
726 # if !@HAVE_SINL@ || !@HAVE_DECL_SINL@
727 _GL_FUNCDECL_SYS (sinl, long double, (long double x));
729 _GL_CXXALIAS_SYS (sinl, long double, (long double x));
730 _GL_CXXALIASWARN (sinl);
731 #elif defined GNULIB_POSIXCHECK
733 # if HAVE_RAW_DECL_SINL
734 _GL_WARN_ON_USE (sinl, "sinl is unportable - "
735 "use gnulib module mathl for portability");
743 _GL_FUNCDECL_SYS (sqrtf, float, (float x));
745 _GL_CXXALIAS_SYS (sqrtf, float, (float x));
746 _GL_CXXALIASWARN (sqrtf);
747 #elif defined GNULIB_POSIXCHECK
749 # if HAVE_RAW_DECL_SQRTF
750 _GL_WARN_ON_USE (sqrtf, "sqrtf is unportable - "
751 "use gnulib module sqrtf for portability");
756 # if !@HAVE_SQRTL@ || !@HAVE_DECL_SQRTL@
757 _GL_FUNCDECL_SYS (sqrtl, long double, (long double x));
759 _GL_CXXALIAS_SYS (sqrtl, long double, (long double x));
760 _GL_CXXALIASWARN (sqrtl);
761 #elif defined GNULIB_POSIXCHECK
763 # if HAVE_RAW_DECL_SQRTL
764 _GL_WARN_ON_USE (sqrtl, "sqrtl is unportable - "
765 "use gnulib module mathl for portability");
773 _GL_FUNCDECL_SYS (tanf, float, (float x));
775 _GL_CXXALIAS_SYS (tanf, float, (float x));
776 _GL_CXXALIASWARN (tanf);
777 #elif defined GNULIB_POSIXCHECK
779 # if HAVE_RAW_DECL_TANF
780 _GL_WARN_ON_USE (tanf, "tanf is unportable - "
781 "use gnulib module tanf for portability");
786 # if !@HAVE_TANL@ || !@HAVE_DECL_TANL@
787 _GL_FUNCDECL_SYS (tanl, long double, (long double x));
789 _GL_CXXALIAS_SYS (tanl, long double, (long double x));
790 _GL_CXXALIASWARN (tanl);
791 #elif defined GNULIB_POSIXCHECK
793 # if HAVE_RAW_DECL_TANL
794 _GL_WARN_ON_USE (tanl, "tanl is unportable - "
795 "use gnulib module mathl for portability");
801 # if @REPLACE_TRUNCF@
802 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
803 # define truncf rpl_truncf
805 _GL_FUNCDECL_RPL (truncf, float, (float x));
806 _GL_CXXALIAS_RPL (truncf, float, (float x));
808 # if !@HAVE_DECL_TRUNCF@
809 _GL_FUNCDECL_SYS (truncf, float, (float x));
811 _GL_CXXALIAS_SYS (truncf, float, (float x));
813 _GL_CXXALIASWARN (truncf);
814 #elif defined GNULIB_POSIXCHECK
816 # if HAVE_RAW_DECL_TRUNCF
817 _GL_WARN_ON_USE (truncf, "truncf is unportable - "
818 "use gnulib module truncf for portability");
824 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
825 # define trunc rpl_trunc
827 _GL_FUNCDECL_RPL (trunc, double, (double x));
828 _GL_CXXALIAS_RPL (trunc, double, (double x));
830 # if !@HAVE_DECL_TRUNC@
831 _GL_FUNCDECL_SYS (trunc, double, (double x));
833 _GL_CXXALIAS_SYS (trunc, double, (double x));
835 _GL_CXXALIASWARN (trunc);
836 #elif defined GNULIB_POSIXCHECK
838 # if HAVE_RAW_DECL_TRUNC
839 _GL_WARN_ON_USE (trunc, "trunc is unportable - "
840 "use gnulib module trunc for portability");
845 # if @REPLACE_TRUNCL@
846 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
848 # define truncl rpl_truncl
850 _GL_FUNCDECL_RPL (truncl, long double, (long double x));
851 _GL_CXXALIAS_RPL (truncl, long double, (long double x));
853 # if !@HAVE_DECL_TRUNCL@
854 _GL_FUNCDECL_SYS (truncl, long double, (long double x));
856 _GL_CXXALIAS_SYS (truncl, long double, (long double x));
858 _GL_CXXALIASWARN (truncl);
859 #elif defined GNULIB_POSIXCHECK
861 # if HAVE_RAW_DECL_TRUNCL
862 _GL_WARN_ON_USE (truncl, "truncl is unportable - "
863 "use gnulib module truncl for portability");
868 /* Definitions of function-like macros come here, after the function
872 #if @GNULIB_ISFINITE@
873 # if @REPLACE_ISFINITE@
874 _GL_EXTERN_C int gl_isfinitef (float x);
875 _GL_EXTERN_C int gl_isfinited (double x);
876 _GL_EXTERN_C int gl_isfinitel (long double x);
878 # define isfinite(x) \
879 (sizeof (x) == sizeof (long double) ? gl_isfinitel (x) : \
880 sizeof (x) == sizeof (double) ? gl_isfinited (x) : \
883 #elif defined GNULIB_POSIXCHECK
884 # if defined isfinite
885 _GL_WARN_REAL_FLOATING_DECL (isfinite);
887 # define isfinite(x) _GL_WARN_REAL_FLOATING_IMPL (isfinite, x)
894 _GL_EXTERN_C int gl_isinff (float x);
895 _GL_EXTERN_C int gl_isinfd (double x);
896 _GL_EXTERN_C int gl_isinfl (long double x);
899 (sizeof (x) == sizeof (long double) ? gl_isinfl (x) : \
900 sizeof (x) == sizeof (double) ? gl_isinfd (x) : \
903 #elif defined GNULIB_POSIXCHECK
905 _GL_WARN_REAL_FLOATING_DECL (isinf);
907 # define isinf(x) _GL_WARN_REAL_FLOATING_IMPL (isinf, x)
913 /* Test for NaN for 'float' numbers. */
915 /* The original <math.h> included above provides a declaration of isnan macro
916 or (older) isnanf function. */
918 /* GCC 4.0 and newer provides three built-ins for isnan. */
920 # define isnanf(x) __builtin_isnanf ((float)(x))
923 # define isnanf(x) isnan ((float)(x))
926 /* Test whether X is a NaN. */
928 # define isnanf rpl_isnanf
929 _GL_EXTERN_C int isnanf (float x);
934 /* Test for NaN for 'double' numbers.
935 This function is a gnulib extension, unlike isnan() which applied only
936 to 'double' numbers earlier but now is a type-generic macro. */
938 /* The original <math.h> included above provides a declaration of isnan
941 /* GCC 4.0 and newer provides three built-ins for isnan. */
943 # define isnand(x) __builtin_isnan ((double)(x))
946 # define isnand(x) isnan ((double)(x))
949 /* Test whether X is a NaN. */
951 # define isnand rpl_isnand
952 _GL_EXTERN_C int isnand (double x);
957 /* Test for NaN for 'long double' numbers. */
959 /* The original <math.h> included above provides a declaration of isnan
960 macro or (older) isnanl function. */
962 /* GCC 4.0 and newer provides three built-ins for isnan. */
964 # define isnanl(x) __builtin_isnanl ((long double)(x))
967 # define isnanl(x) isnan ((long double)(x))
970 /* Test whether X is a NaN. */
972 # define isnanl rpl_isnanl
973 _GL_EXTERN_C int isnanl (long double x);
977 /* This must come *after* the snippets for GNULIB_ISNANF and GNULIB_ISNANL! */
980 /* We can't just use the isnanf macro (e.g.) as exposed by
981 isnanf.h (e.g.) here, because those may end up being macros
982 that recursively expand back to isnan. So use the gnulib
983 replacements for them directly. */
984 # if @HAVE_ISNANF@ && __GNUC__ >= 4
985 # define gl_isnan_f(x) __builtin_isnanf ((float)(x))
987 _GL_EXTERN_C int rpl_isnanf (float x);
988 # define gl_isnan_f(x) rpl_isnanf (x)
990 # if @HAVE_ISNAND@ && __GNUC__ >= 4
991 # define gl_isnan_d(x) __builtin_isnan ((double)(x))
993 _GL_EXTERN_C int rpl_isnand (double x);
994 # define gl_isnan_d(x) rpl_isnand (x)
996 # if @HAVE_ISNANL@ && __GNUC__ >= 4
997 # define gl_isnan_l(x) __builtin_isnanl ((long double)(x))
999 _GL_EXTERN_C int rpl_isnanl (long double x);
1000 # define gl_isnan_l(x) rpl_isnanl (x)
1004 (sizeof (x) == sizeof (long double) ? gl_isnan_l (x) : \
1005 sizeof (x) == sizeof (double) ? gl_isnan_d (x) : \
1007 # elif __GNUC__ >= 4
1010 (sizeof (x) == sizeof (long double) ? __builtin_isnanl ((long double)(x)) : \
1011 sizeof (x) == sizeof (double) ? __builtin_isnan ((double)(x)) : \
1012 __builtin_isnanf ((float)(x)))
1014 /* Ensure isnan is a macro. */
1016 # define isnan isnan
1018 #elif defined GNULIB_POSIXCHECK
1020 _GL_WARN_REAL_FLOATING_DECL (isnan);
1022 # define isnan(x) _GL_WARN_REAL_FLOATING_IMPL (isnan, x)
1027 #if @GNULIB_SIGNBIT@
1028 # if @REPLACE_SIGNBIT_USING_GCC@
1030 /* GCC 4.0 and newer provides three built-ins for signbit. */
1031 # define signbit(x) \
1032 (sizeof (x) == sizeof (long double) ? __builtin_signbitl (x) : \
1033 sizeof (x) == sizeof (double) ? __builtin_signbit (x) : \
1034 __builtin_signbitf (x))
1036 # if @REPLACE_SIGNBIT@
1038 _GL_EXTERN_C int gl_signbitf (float arg);
1039 _GL_EXTERN_C int gl_signbitd (double arg);
1040 _GL_EXTERN_C int gl_signbitl (long double arg);
1041 # if __GNUC__ >= 2 && !__STRICT_ANSI__
1042 # define _GL_NUM_UINT_WORDS(type) \
1043 ((sizeof (type) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
1044 # if defined FLT_SIGNBIT_WORD && defined FLT_SIGNBIT_BIT && !defined gl_signbitf
1045 # define gl_signbitf_OPTIMIZED_MACRO
1046 # define gl_signbitf(arg) \
1047 ({ union { float _value; \
1048 unsigned int _word[_GL_NUM_UINT_WORDS (float)]; \
1050 _m._value = (arg); \
1051 (_m._word[FLT_SIGNBIT_WORD] >> FLT_SIGNBIT_BIT) & 1; \
1054 # if defined DBL_SIGNBIT_WORD && defined DBL_SIGNBIT_BIT && !defined gl_signbitd
1055 # define gl_signbitd_OPTIMIZED_MACRO
1056 # define gl_signbitd(arg) \
1057 ({ union { double _value; \
1058 unsigned int _word[_GL_NUM_UINT_WORDS (double)]; \
1060 _m._value = (arg); \
1061 (_m._word[DBL_SIGNBIT_WORD] >> DBL_SIGNBIT_BIT) & 1; \
1064 # if defined LDBL_SIGNBIT_WORD && defined LDBL_SIGNBIT_BIT && !defined gl_signbitl
1065 # define gl_signbitl_OPTIMIZED_MACRO
1066 # define gl_signbitl(arg) \
1067 ({ union { long double _value; \
1068 unsigned int _word[_GL_NUM_UINT_WORDS (long double)]; \
1070 _m._value = (arg); \
1071 (_m._word[LDBL_SIGNBIT_WORD] >> LDBL_SIGNBIT_BIT) & 1; \
1075 # define signbit(x) \
1076 (sizeof (x) == sizeof (long double) ? gl_signbitl (x) : \
1077 sizeof (x) == sizeof (double) ? gl_signbitd (x) : \
1080 #elif defined GNULIB_POSIXCHECK
1081 # if defined signbit
1082 _GL_WARN_REAL_FLOATING_DECL (signbit);
1084 # define signbit(x) _GL_WARN_REAL_FLOATING_IMPL (signbit, x)
1089 #endif /* _@GUARD_PREFIX@_MATH_H */
1090 #endif /* _@GUARD_PREFIX@_MATH_H */