lib/math.in.h

   1 /* A GNU-like <math.h>.
   2
   3    Copyright (C) 2002-2003, 2007-2011 Free Software Foundation, Inc.
   4
   5    This program is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU Lesser 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.
   9
  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 Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _@GUARD_PREFIX@_MATH_H
  19
  20 #if __GNUC__ >= 3
  21 @PRAGMA_SYSTEM_HEADER@
  22 #endif
  23 @PRAGMA_COLUMNS@
  24
  25 /* The include_next requires a split double-inclusion guard.  */
  26 #@INCLUDE_NEXT_AS_FIRST_DIRECTIVE@ @NEXT_AS_FIRST_DIRECTIVE_MATH_H@
  27
  28 #ifndef _@GUARD_PREFIX@_MATH_H
  29 #define _@GUARD_PREFIX@_MATH_H
  30
  31
  32 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
  33
  34 /* The definition of _GL_ARG_NONNULL is copied here.  */
  35
  36 /* The definition of _GL_WARN_ON_USE is copied here.  */
  37
  38 #ifdef __cplusplus
  39 /* Helper macros to define type-generic function FUNC as overloaded functions,
  40    rather than as macros like in C.  POSIX declares these with an argument of
  41    real-floating (that is, one of float, double, or long double).  */
  42 # define _GL_MATH_CXX_REAL_FLOATING_DECL_1(func) \
  43 static inline int                                                   \
  44 _gl_cxx_ ## func ## f (float f)                                     \
  45 {                                                                   \
  46   return func (f);                                                  \
  47 }                                                                   \
  48 static inline int                                                   \
  49 _gl_cxx_ ## func ## d (double d)                                    \
  50 {                                                                   \
  51   return func (d);                                                  \
  52 }                                                                   \
  53 static inline int                                                   \
  54 _gl_cxx_ ## func ## l (long double l)                               \
  55 {                                                                   \
  56   return func (l);                                                  \
  57 }
  58 # define _GL_MATH_CXX_REAL_FLOATING_DECL_2(func) \
  59 inline int                                                          \
  60 func (float f)                                                      \
  61 {                                                                   \
  62   return _gl_cxx_ ## func ## f (f);                                 \
  63 }                                                                   \
  64 inline int                                                          \
  65 func (double d)                                                     \
  66 {                                                                   \
  67   return _gl_cxx_ ## func ## d (d);                                 \
  68 }                                                                   \
  69 inline int                                                          \
  70 func (long double l)                                                \
  71 {                                                                   \
  72   return _gl_cxx_ ## func ## l (l);                                 \
  73 }
  74 #endif
  75
  76 /* Helper macros to define a portability warning for the
  77    classification macro FUNC called with VALUE.  POSIX declares the
  78    classification macros with an argument of real-floating (that is,
  79    one of float, double, or long double).  */
  80 #define _GL_WARN_REAL_FLOATING_DECL(func) \
  81 static inline int                                                   \
  82 rpl_ ## func ## f (float f)                                         \
  83 {                                                                   \
  84   return func (f);                                                  \
  85 }                                                                   \
  86 static inline int                                                   \
  87 rpl_ ## func ## d (double d)                                        \
  88 {                                                                   \
  89   return func (d);                                                  \
  90 }                                                                   \
  91 static inline int                                                   \
  92 rpl_ ## func ## l (long double l)                                   \
  93 {                                                                   \
  94   return func (l);                                                  \
  95 }                                                                   \
  96 _GL_WARN_ON_USE (rpl_ ## func ## f, #func " is unportable - "       \
  97                  "use gnulib module " #func " for portability");    \
  98 _GL_WARN_ON_USE (rpl_ ## func ## d, #func " is unportable - "       \
  99                  "use gnulib module " #func " for portability");    \
 100 _GL_WARN_ON_USE (rpl_ ## func ## l, #func " is unportable - "       \
 101                  "use gnulib module " #func " for portability")
 102 #define _GL_WARN_REAL_FLOATING_IMPL(func, value) \
 103   (sizeof (value) == sizeof (float) ? rpl_ ## func ## f (value)     \
 104    : sizeof (value) == sizeof (double) ? rpl_ ## func ## d (value)  \
 105    : rpl_ ## func ## l (value))
 106
 107
 108 #if @REPLACE_ITOLD@
 109 /* Pull in a function that fixes the 'int' to 'long double' conversion
 110    of glibc 2.7.  */
 111 _GL_EXTERN_C void _Qp_itoq (long double *, int);
 112 static void (*_gl_math_fix_itold) (long double *, int) = _Qp_itoq;
 113 #endif
 114
 115
 116 /* POSIX allows platforms that don't support NAN.  But all major
 117    machines in the past 15 years have supported something close to
 118    IEEE NaN, so we define this unconditionally.  We also must define
 119    it on platforms like Solaris 10, where NAN is present but defined
 120    as a function pointer rather than a floating point constant.  */
 121 #if !defined NAN || @REPLACE_NAN@
 122 # if !GNULIB_defined_NAN
 123 #  undef NAN
 124   /* The Compaq (ex-DEC) C 6.4 compiler and the Microsoft MSVC 9 compiler
 125      choke on the expression 0.0 / 0.0.  */
 126 #  if defined __DECC || defined _MSC_VER
 127 static float
 128 _NaN ()
 129 {
 130   static float zero = 0.0f;
 131   return zero / zero;
 132 }
 133 #   define NAN (_NaN())
 134 #  else
 135 #   define NAN (0.0f / 0.0f)
 136 #  endif
 137 #  define GNULIB_defined_NAN 1
 138 # endif
 139 #endif
 140
 141 /* Solaris 10 defines HUGE_VAL, but as a function pointer rather
 142    than a floating point constant.  */
 143 #if @REPLACE_HUGE_VAL@
 144 # undef HUGE_VAL
 145 # define HUGE_VAL (1.0 / 0.0)
 146 #endif
 147
 148
 149 #if @GNULIB_ACOSF@
 150 # if !@HAVE_ACOSF@
 151 #  undef acosf
 152 _GL_FUNCDECL_SYS (acosf, float, (float x));
 153 # endif
 154 _GL_CXXALIAS_SYS (acosf, float, (float x));
 155 _GL_CXXALIASWARN (acosf);
 156 #elif defined GNULIB_POSIXCHECK
 157 # undef acosf
 158 # if HAVE_RAW_DECL_ACOSF
 159 _GL_WARN_ON_USE (acosf, "acosf is unportable - "
 160                  "use gnulib module acosf for portability");
 161 # endif
 162 #endif
 163
 164 #if @GNULIB_ACOSL@
 165 # if !@HAVE_ACOSL@ || !@HAVE_DECL_ACOSL@
 166 _GL_FUNCDECL_SYS (acosl, long double, (long double x));
 167 # endif
 168 _GL_CXXALIAS_SYS (acosl, long double, (long double x));
 169 _GL_CXXALIASWARN (acosl);
 170 #elif defined GNULIB_POSIXCHECK
 171 # undef acosl
 172 # if HAVE_RAW_DECL_ACOSL
 173 _GL_WARN_ON_USE (acosl, "acosl is unportable - "
 174                  "use gnulib module mathl for portability");
 175 # endif
 176 #endif
 177
 178
 179 #if @GNULIB_ASINF@
 180 # if !@HAVE_ASINF@
 181 #  undef asinf
 182 _GL_FUNCDECL_SYS (asinf, float, (float x));
 183 # endif
 184 _GL_CXXALIAS_SYS (asinf, float, (float x));
 185 _GL_CXXALIASWARN (asinf);
 186 #elif defined GNULIB_POSIXCHECK
 187 # undef asinf
 188 # if HAVE_RAW_DECL_ASINF
 189 _GL_WARN_ON_USE (asinf, "asinf is unportable - "
 190                  "use gnulib module asinf for portability");
 191 # endif
 192 #endif
 193
 194 #if @GNULIB_ASINL@
 195 # if !@HAVE_ASINL@ || !@HAVE_DECL_ASINL@
 196 _GL_FUNCDECL_SYS (asinl, long double, (long double x));
 197 # endif
 198 _GL_CXXALIAS_SYS (asinl, long double, (long double x));
 199 _GL_CXXALIASWARN (asinl);
 200 #elif defined GNULIB_POSIXCHECK
 201 # undef asinl
 202 # if HAVE_RAW_DECL_ASINL
 203 _GL_WARN_ON_USE (asinl, "asinl is unportable - "
 204                  "use gnulib module mathl for portability");
 205 # endif
 206 #endif
 207
 208
 209 #if @GNULIB_ATANF@
 210 # if !@HAVE_ATANF@
 211 #  undef atanf
 212 _GL_FUNCDECL_SYS (atanf, float, (float x));
 213 # endif
 214 _GL_CXXALIAS_SYS (atanf, float, (float x));
 215 _GL_CXXALIASWARN (atanf);
 216 #elif defined GNULIB_POSIXCHECK
 217 # undef atanf
 218 # if HAVE_RAW_DECL_ATANF
 219 _GL_WARN_ON_USE (atanf, "atanf is unportable - "
 220                  "use gnulib module atanf for portability");
 221 # endif
 222 #endif
 223
 224 #if @GNULIB_ATANL@
 225 # if !@HAVE_ATANL@ || !@HAVE_DECL_ATANL@
 226 _GL_FUNCDECL_SYS (atanl, long double, (long double x));
 227 # endif
 228 _GL_CXXALIAS_SYS (atanl, long double, (long double x));
 229 _GL_CXXALIASWARN (atanl);
 230 #elif defined GNULIB_POSIXCHECK
 231 # undef atanl
 232 # if HAVE_RAW_DECL_ATANL
 233 _GL_WARN_ON_USE (atanl, "atanl is unportable - "
 234                  "use gnulib module mathl for portability");
 235 # endif
 236 #endif
 237
 238
 239 #if @GNULIB_ATAN2F@
 240 # if !@HAVE_ATAN2F@
 241 #  undef atan2f
 242 _GL_FUNCDECL_SYS (atan2f, float, (float y, float x));
 243 # endif
 244 _GL_CXXALIAS_SYS (atan2f, float, (float y, float x));
 245 _GL_CXXALIASWARN (atan2f);
 246 #elif defined GNULIB_POSIXCHECK
 247 # undef atan2f
 248 # if HAVE_RAW_DECL_ATAN2F
 249 _GL_WARN_ON_USE (atan2f, "atan2f is unportable - "
 250                  "use gnulib module atan2f for portability");
 251 # endif
 252 #endif
 253
 254
 255 #if @GNULIB_CEILF@
 256 # if @REPLACE_CEILF@
 257 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 258 #   undef ceilf
 259 #   define ceilf rpl_ceilf
 260 #  endif
 261 _GL_FUNCDECL_RPL (ceilf, float, (float x));
 262 _GL_CXXALIAS_RPL (ceilf, float, (float x));
 263 # else
 264 #  if !@HAVE_DECL_CEILF@
 265 _GL_FUNCDECL_SYS (ceilf, float, (float x));
 266 #  endif
 267 _GL_CXXALIAS_SYS (ceilf, float, (float x));
 268 # endif
 269 _GL_CXXALIASWARN (ceilf);
 270 #elif defined GNULIB_POSIXCHECK
 271 # undef ceilf
 272 # if HAVE_RAW_DECL_CEILF
 273 _GL_WARN_ON_USE (ceilf, "ceilf is unportable - "
 274                  "use gnulib module ceilf for portability");
 275 # endif
 276 #endif
 277
 278 #if @GNULIB_CEIL@
 279 # if @REPLACE_CEIL@
 280 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 281 #   define ceil rpl_ceil
 282 #  endif
 283 _GL_FUNCDECL_RPL (ceil, double, (double x));
 284 _GL_CXXALIAS_RPL (ceil, double, (double x));
 285 # else
 286 _GL_CXXALIAS_SYS (ceil, double, (double x));
 287 # endif
 288 _GL_CXXALIASWARN (ceil);
 289 #endif
 290
 291 #if @GNULIB_CEILL@
 292 # if @REPLACE_CEILL@
 293 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 294 #   undef ceill
 295 #   define ceill rpl_ceill
 296 #  endif
 297 _GL_FUNCDECL_RPL (ceill, long double, (long double x));
 298 _GL_CXXALIAS_RPL (ceill, long double, (long double x));
 299 # else
 300 #  if !@HAVE_DECL_CEILL@
 301 _GL_FUNCDECL_SYS (ceill, long double, (long double x));
 302 #  endif
 303 _GL_CXXALIAS_SYS (ceill, long double, (long double x));
 304 # endif
 305 _GL_CXXALIASWARN (ceill);
 306 #elif defined GNULIB_POSIXCHECK
 307 # undef ceill
 308 # if HAVE_RAW_DECL_CEILL
 309 _GL_WARN_ON_USE (ceill, "ceill is unportable - "
 310                  "use gnulib module ceill for portability");
 311 # endif
 312 #endif
 313
 314
 315 #if @GNULIB_COPYSIGNF@
 316 # if !@HAVE_COPYSIGNF@
 317 _GL_FUNCDECL_SYS (copysignf, float, (float x, float y));
 318 # endif
 319 _GL_CXXALIAS_SYS (copysignf, float, (float x, float y));
 320 _GL_CXXALIASWARN (copysignf);
 321 #elif defined GNULIB_POSIXCHECK
 322 # undef copysignf
 323 # if HAVE_RAW_DECL_COPYSIGNF
 324 _GL_WARN_ON_USE (copysignf, "copysignf is unportable - "
 325                  "use gnulib module copysignf for portability");
 326 # endif
 327 #endif
 328
 329 #if @GNULIB_COPYSIGN@
 330 # if !@HAVE_COPYSIGN@
 331 _GL_FUNCDECL_SYS (copysign, double, (double x, double y));
 332 # endif
 333 _GL_CXXALIAS_SYS (copysign, double, (double x, double y));
 334 _GL_CXXALIASWARN (copysign);
 335 #elif defined GNULIB_POSIXCHECK
 336 # undef copysign
 337 # if HAVE_RAW_DECL_COPYSIGN
 338 _GL_WARN_ON_USE (copysign, "copysign is unportable - "
 339                  "use gnulib module copysign for portability");
 340 # endif
 341 #endif
 342
 343 #if @GNULIB_COPYSIGNL@
 344 # if !@HAVE_COPYSIGNL@
 345 _GL_FUNCDECL_SYS (copysignl, long double, (long double x, long double y));
 346 # endif
 347 _GL_CXXALIAS_SYS (copysignl, long double, (long double x, long double y));
 348 _GL_CXXALIASWARN (copysignl);
 349 #elif defined GNULIB_POSIXCHECK
 350 # undef copysignl
 351 # if HAVE_RAW_DECL_COPYSIGNL
 352 _GL_WARN_ON_USE (copysign, "copysignl is unportable - "
 353                  "use gnulib module copysignl for portability");
 354 # endif
 355 #endif
 356
 357
 358 #if @GNULIB_COSF@
 359 # if !@HAVE_COSF@
 360 #  undef cosf
 361 _GL_FUNCDECL_SYS (cosf, float, (float x));
 362 # endif
 363 _GL_CXXALIAS_SYS (cosf, float, (float x));
 364 _GL_CXXALIASWARN (cosf);
 365 #elif defined GNULIB_POSIXCHECK
 366 # undef cosf
 367 # if HAVE_RAW_DECL_COSF
 368 _GL_WARN_ON_USE (cosf, "cosf is unportable - "
 369                  "use gnulib module cosf for portability");
 370 # endif
 371 #endif
 372
 373 #if @GNULIB_COSL@
 374 # if !@HAVE_COSL@ || !@HAVE_DECL_COSL@
 375 _GL_FUNCDECL_SYS (cosl, long double, (long double x));
 376 # endif
 377 _GL_CXXALIAS_SYS (cosl, long double, (long double x));
 378 _GL_CXXALIASWARN (cosl);
 379 #elif defined GNULIB_POSIXCHECK
 380 # undef cosl
 381 # if HAVE_RAW_DECL_COSL
 382 _GL_WARN_ON_USE (cosl, "cosl is unportable - "
 383                  "use gnulib module mathl for portability");
 384 # endif
 385 #endif
 386
 387
 388 #if @GNULIB_COSHF@
 389 # if !@HAVE_COSHF@
 390 #  undef coshf
 391 _GL_FUNCDECL_SYS (coshf, float, (float x));
 392 # endif
 393 _GL_CXXALIAS_SYS (coshf, float, (float x));
 394 _GL_CXXALIASWARN (coshf);
 395 #elif defined GNULIB_POSIXCHECK
 396 # undef coshf
 397 # if HAVE_RAW_DECL_COSHF
 398 _GL_WARN_ON_USE (coshf, "coshf is unportable - "
 399                  "use gnulib module coshf for portability");
 400 # endif
 401 #endif
 402
 403
 404 #if @GNULIB_EXPF@
 405 # if !@HAVE_EXPF@
 406 #  undef expf
 407 _GL_FUNCDECL_SYS (expf, float, (float x));
 408 # endif
 409 _GL_CXXALIAS_SYS (expf, float, (float x));
 410 _GL_CXXALIASWARN (expf);
 411 #elif defined GNULIB_POSIXCHECK
 412 # undef expf
 413 # if HAVE_RAW_DECL_EXPF
 414 _GL_WARN_ON_USE (expf, "expf is unportable - "
 415                  "use gnulib module expf for portability");
 416 # endif
 417 #endif
 418
 419 #if @GNULIB_EXPL@
 420 # if !@HAVE_EXPL@ || !@HAVE_DECL_EXPL@
 421 _GL_FUNCDECL_SYS (expl, long double, (long double x));
 422 # endif
 423 _GL_CXXALIAS_SYS (expl, long double, (long double x));
 424 _GL_CXXALIASWARN (expl);
 425 #elif defined GNULIB_POSIXCHECK
 426 # undef expl
 427 # if HAVE_RAW_DECL_EXPL
 428 _GL_WARN_ON_USE (expl, "expl is unportable - "
 429                  "use gnulib module mathl for portability");
 430 # endif
 431 #endif
 432
 433
 434 #if @GNULIB_FABSF@
 435 # if !@HAVE_FABSF@
 436 #  undef fabsf
 437 _GL_FUNCDECL_SYS (fabsf, float, (float x));
 438 # endif
 439 _GL_CXXALIAS_SYS (fabsf, float, (float x));
 440 _GL_CXXALIASWARN (fabsf);
 441 #elif defined GNULIB_POSIXCHECK
 442 # undef fabsf
 443 # if HAVE_RAW_DECL_FABSF
 444 _GL_WARN_ON_USE (fabsf, "fabsf is unportable - "
 445                  "use gnulib module fabsf for portability");
 446 # endif
 447 #endif
 448
 449
 450 #if @GNULIB_FLOORF@
 451 # if @REPLACE_FLOORF@
 452 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 453 #   undef floorf
 454 #   define floorf rpl_floorf
 455 #  endif
 456 _GL_FUNCDECL_RPL (floorf, float, (float x));
 457 _GL_CXXALIAS_RPL (floorf, float, (float x));
 458 # else
 459 #  if !@HAVE_DECL_FLOORF@
 460 _GL_FUNCDECL_SYS (floorf, float, (float x));
 461 #  endif
 462 _GL_CXXALIAS_SYS (floorf, float, (float x));
 463 # endif
 464 _GL_CXXALIASWARN (floorf);
 465 #elif defined GNULIB_POSIXCHECK
 466 # undef floorf
 467 # if HAVE_RAW_DECL_FLOORF
 468 _GL_WARN_ON_USE (floorf, "floorf is unportable - "
 469                  "use gnulib module floorf for portability");
 470 # endif
 471 #endif
 472
 473 #if @GNULIB_FLOOR@
 474 # if @REPLACE_FLOOR@
 475 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 476 #   define floor rpl_floor
 477 #  endif
 478 _GL_FUNCDECL_RPL (floor, double, (double x));
 479 _GL_CXXALIAS_RPL (floor, double, (double x));
 480 # else
 481 _GL_CXXALIAS_SYS (floor, double, (double x));
 482 # endif
 483 _GL_CXXALIASWARN (floor);
 484 #endif
 485
 486 #if @GNULIB_FLOORL@
 487 # if @REPLACE_FLOORL@
 488 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 489 #   undef floorl
 490 #   define floorl rpl_floorl
 491 #  endif
 492 _GL_FUNCDECL_RPL (floorl, long double, (long double x));
 493 _GL_CXXALIAS_RPL (floorl, long double, (long double x));
 494 # else
 495 #  if !@HAVE_DECL_FLOORL@
 496 _GL_FUNCDECL_SYS (floorl, long double, (long double x));
 497 #  endif
 498 _GL_CXXALIAS_SYS (floorl, long double, (long double x));
 499 # endif
 500 _GL_CXXALIASWARN (floorl);
 501 #elif defined GNULIB_POSIXCHECK
 502 # undef floorl
 503 # if HAVE_RAW_DECL_FLOORL
 504 _GL_WARN_ON_USE (floorl, "floorl is unportable - "
 505                  "use gnulib module floorl for portability");
 506 # endif
 507 #endif
 508
 509
 510 #if @GNULIB_FMODF@
 511 # if !@HAVE_FMODF@
 512 #  undef fmodf
 513 _GL_FUNCDECL_SYS (fmodf, float, (float x, float y));
 514 # endif
 515 _GL_CXXALIAS_SYS (fmodf, float, (float x, float y));
 516 _GL_CXXALIASWARN (fmodf);
 517 #elif defined GNULIB_POSIXCHECK
 518 # undef fmodf
 519 # if HAVE_RAW_DECL_FMODF
 520 _GL_WARN_ON_USE (fmodf, "fmodf is unportable - "
 521                  "use gnulib module fmodf for portability");
 522 # endif
 523 #endif
 524
 525
 526 /* Write x as
 527      x = mantissa * 2^exp
 528    where
 529      If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
 530      If x is zero: mantissa = x, exp = 0.
 531      If x is infinite or NaN: mantissa = x, exp unspecified.
 532    Store exp in *EXPPTR and return mantissa.  */
 533 #if @GNULIB_FREXPF@
 534 # if @REPLACE_FREXPF@
 535 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 536 #   undef frexpf
 537 #   define frexpf rpl_frexpf
 538 #  endif
 539 _GL_FUNCDECL_RPL (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
 540 _GL_CXXALIAS_RPL (frexpf, float, (float x, int *expptr));
 541 # else
 542 #  if !@HAVE_FREXPF@
 543 #   undef frexpf
 544 _GL_FUNCDECL_SYS (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
 545 #  endif
 546 _GL_CXXALIAS_SYS (frexpf, float, (float x, int *expptr));
 547 # endif
 548 _GL_CXXALIASWARN (frexpf);
 549 #elif defined GNULIB_POSIXCHECK
 550 # undef frexpf
 551 # if HAVE_RAW_DECL_FREXPF
 552 _GL_WARN_ON_USE (frexpf, "frexpf is unportable - "
 553                  "use gnulib module frexpf for portability");
 554 # endif
 555 #endif
 556
 557 /* Write x as
 558      x = mantissa * 2^exp
 559    where
 560      If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
 561      If x is zero: mantissa = x, exp = 0.
 562      If x is infinite or NaN: mantissa = x, exp unspecified.
 563    Store exp in *EXPPTR and return mantissa.  */
 564 #if @GNULIB_FREXP@
 565 # if @REPLACE_FREXP@
 566 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 567 #   define frexp rpl_frexp
 568 #  endif
 569 _GL_FUNCDECL_RPL (frexp, double, (double x, int *expptr) _GL_ARG_NONNULL ((2)));
 570 _GL_CXXALIAS_RPL (frexp, double, (double x, int *expptr));
 571 # else
 572 _GL_CXXALIAS_SYS (frexp, double, (double x, int *expptr));
 573 # endif
 574 _GL_CXXALIASWARN (frexp);
 575 #elif defined GNULIB_POSIXCHECK
 576 # undef frexp
 577 /* Assume frexp is always declared.  */
 578 _GL_WARN_ON_USE (frexp, "frexp is unportable - "
 579                  "use gnulib module frexp for portability");
 580 #endif
 581
 582 /* Write x as
 583      x = mantissa * 2^exp
 584    where
 585      If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
 586      If x is zero: mantissa = x, exp = 0.
 587      If x is infinite or NaN: mantissa = x, exp unspecified.
 588    Store exp in *EXPPTR and return mantissa.  */
 589 #if @GNULIB_FREXPL@ && @REPLACE_FREXPL@
 590 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 591 #  undef frexpl
 592 #  define frexpl rpl_frexpl
 593 # endif
 594 _GL_FUNCDECL_RPL (frexpl, long double,
 595                   (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
 596 _GL_CXXALIAS_RPL (frexpl, long double, (long double x, int *expptr));
 597 #else
 598 # if !@HAVE_DECL_FREXPL@
 599 _GL_FUNCDECL_SYS (frexpl, long double,
 600                   (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
 601 # endif
 602 # if @GNULIB_FREXPL@
 603 _GL_CXXALIAS_SYS (frexpl, long double, (long double x, int *expptr));
 604 # endif
 605 #endif
 606 #if @GNULIB_FREXPL@ && !(@REPLACE_FREXPL@ && !@HAVE_DECL_FREXPL@)
 607 _GL_CXXALIASWARN (frexpl);
 608 #endif
 609 #if !@GNULIB_FREXPL@ && defined GNULIB_POSIXCHECK
 610 # undef frexpl
 611 # if HAVE_RAW_DECL_FREXPL
 612 _GL_WARN_ON_USE (frexpl, "frexpl is unportable - "
 613                  "use gnulib module frexpl for portability");
 614 # endif
 615 #endif
 616
 617
 618 /* Return x * 2^exp.  */
 619 #if @GNULIB_LDEXPF@
 620 # if !@HAVE_LDEXPF@
 621 #  undef ldexpf
 622 _GL_FUNCDECL_SYS (ldexpf, float, (float x, int exp));
 623 # endif
 624 _GL_CXXALIAS_SYS (ldexpf, float, (float x, int exp));
 625 _GL_CXXALIASWARN (ldexpf);
 626 #elif defined GNULIB_POSIXCHECK
 627 # undef ldexpf
 628 # if HAVE_RAW_DECL_LDEXPF
 629 _GL_WARN_ON_USE (ldexpf, "ldexpf is unportable - "
 630                  "use gnulib module ldexpf for portability");
 631 # endif
 632 #endif
 633
 634 /* Return x * 2^exp.  */
 635 #if @GNULIB_LDEXPL@ && @REPLACE_LDEXPL@
 636 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 637 #  undef ldexpl
 638 #  define ldexpl rpl_ldexpl
 639 # endif
 640 _GL_FUNCDECL_RPL (ldexpl, long double, (long double x, int exp));
 641 _GL_CXXALIAS_RPL (ldexpl, long double, (long double x, int exp));
 642 #else
 643 # if !@HAVE_DECL_LDEXPL@
 644 _GL_FUNCDECL_SYS (ldexpl, long double, (long double x, int exp));
 645 # endif
 646 # if @GNULIB_LDEXPL@
 647 _GL_CXXALIAS_SYS (ldexpl, long double, (long double x, int exp));
 648 # endif
 649 #endif
 650 #if @GNULIB_LDEXPL@
 651 _GL_CXXALIASWARN (ldexpl);
 652 #endif
 653 #if !@GNULIB_LDEXPL@ && defined GNULIB_POSIXCHECK
 654 # undef ldexpl
 655 # if HAVE_RAW_DECL_LDEXPL
 656 _GL_WARN_ON_USE (ldexpl, "ldexpl is unportable - "
 657                  "use gnulib module ldexpl for portability");
 658 # endif
 659 #endif
 660
 661
 662 #if @GNULIB_LOGB@
 663 # if !@HAVE_DECL_LOGB@
 664 _GL_EXTERN_C double logb (double x);
 665 # endif
 666 #elif defined GNULIB_POSIXCHECK
 667 # undef logb
 668 # if HAVE_RAW_DECL_LOGB
 669 _GL_WARN_ON_USE (logb, "logb is unportable - "
 670                  "use gnulib module logb for portability");
 671 # endif
 672 #endif
 673
 674
 675 #if @GNULIB_LOGF@
 676 # if !@HAVE_LOGF@
 677 #  undef logf
 678 _GL_FUNCDECL_SYS (logf, float, (float x));
 679 # endif
 680 _GL_CXXALIAS_SYS (logf, float, (float x));
 681 _GL_CXXALIASWARN (logf);
 682 #elif defined GNULIB_POSIXCHECK
 683 # undef logf
 684 # if HAVE_RAW_DECL_LOGF
 685 _GL_WARN_ON_USE (logf, "logf is unportable - "
 686                  "use gnulib module logf for portability");
 687 # endif
 688 #endif
 689
 690 #if @GNULIB_LOGL@
 691 # if !@HAVE_LOGL@ || !@HAVE_DECL_LOGL@
 692 _GL_FUNCDECL_SYS (logl, long double, (long double x));
 693 # endif
 694 _GL_CXXALIAS_SYS (logl, long double, (long double x));
 695 _GL_CXXALIASWARN (logl);
 696 #elif defined GNULIB_POSIXCHECK
 697 # undef logl
 698 # if HAVE_RAW_DECL_LOGL
 699 _GL_WARN_ON_USE (logl, "logl is unportable - "
 700                  "use gnulib module mathl for portability");
 701 # endif
 702 #endif
 703
 704
 705 #if @GNULIB_LOG10F@
 706 # if !@HAVE_LOG10F@
 707 #  undef log10f
 708 _GL_FUNCDECL_SYS (log10f, float, (float x));
 709 # endif
 710 _GL_CXXALIAS_SYS (log10f, float, (float x));
 711 _GL_CXXALIASWARN (log10f);
 712 #elif defined GNULIB_POSIXCHECK
 713 # undef log10f
 714 # if HAVE_RAW_DECL_LOG10F
 715 _GL_WARN_ON_USE (log10f, "log10f is unportable - "
 716                  "use gnulib module log10f for portability");
 717 # endif
 718 #endif
 719
 720
 721 #if @GNULIB_MODFF@
 722 # if !@HAVE_MODFF@
 723 #  undef modff
 724 _GL_FUNCDECL_SYS (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
 725 # endif
 726 _GL_CXXALIAS_SYS (modff, float, (float x, float *iptr));
 727 _GL_CXXALIASWARN (modff);
 728 #elif defined GNULIB_POSIXCHECK
 729 # undef modff
 730 # if HAVE_RAW_DECL_MODFF
 731 _GL_WARN_ON_USE (modff, "modff is unportable - "
 732                  "use gnulib module modff for portability");
 733 # endif
 734 #endif
 735
 736
 737 #if @GNULIB_POWF@
 738 # if !@HAVE_POWF@
 739 #  undef powf
 740 _GL_FUNCDECL_SYS (powf, float, (float x, float y));
 741 # endif
 742 _GL_CXXALIAS_SYS (powf, float, (float x, float y));
 743 _GL_CXXALIASWARN (powf);
 744 #elif defined GNULIB_POSIXCHECK
 745 # undef powf
 746 # if HAVE_RAW_DECL_POWF
 747 _GL_WARN_ON_USE (powf, "powf is unportable - "
 748                  "use gnulib module powf for portability");
 749 # endif
 750 #endif
 751
 752
 753 #if @GNULIB_RINTF@
 754 # if !@HAVE_RINTF@
 755 _GL_FUNCDECL_SYS (rintf, float, (float x));
 756 # endif
 757 _GL_CXXALIAS_SYS (rintf, float, (float x));
 758 _GL_CXXALIASWARN (rintf);
 759 #elif defined GNULIB_POSIXCHECK
 760 # undef rintf
 761 # if HAVE_RAW_DECL_RINTF
 762 _GL_WARN_ON_USE (rintf, "rintf is unportable - "
 763                  "use gnulib module rintf for portability");
 764 # endif
 765 #endif
 766
 767 #if @GNULIB_RINT@
 768 # if !@HAVE_RINT@
 769 _GL_FUNCDECL_SYS (rint, double, (double x));
 770 # endif
 771 _GL_CXXALIAS_SYS (rint, double, (double x));
 772 _GL_CXXALIASWARN (rint);
 773 #elif defined GNULIB_POSIXCHECK
 774 # undef rint
 775 # if HAVE_RAW_DECL_RINT
 776 _GL_WARN_ON_USE (rint, "rint is unportable - "
 777                  "use gnulib module rint for portability");
 778 # endif
 779 #endif
 780
 781 #if @GNULIB_RINTL@
 782 # if !@HAVE_RINTL@
 783 _GL_FUNCDECL_SYS (rintl, long double, (long double x));
 784 # endif
 785 _GL_CXXALIAS_SYS (rintl, long double, (long double x));
 786 _GL_CXXALIASWARN (rintl);
 787 #elif defined GNULIB_POSIXCHECK
 788 # undef rintl
 789 # if HAVE_RAW_DECL_RINTL
 790 _GL_WARN_ON_USE (rintl, "rintl is unportable - "
 791                  "use gnulib module rintl for portability");
 792 # endif
 793 #endif
 794
 795
 796 #if @GNULIB_ROUNDF@
 797 # if @REPLACE_ROUNDF@
 798 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 799 #   undef roundf
 800 #   define roundf rpl_roundf
 801 #  endif
 802 _GL_FUNCDECL_RPL (roundf, float, (float x));
 803 _GL_CXXALIAS_RPL (roundf, float, (float x));
 804 # else
 805 #  if !@HAVE_DECL_ROUNDF@
 806 _GL_FUNCDECL_SYS (roundf, float, (float x));
 807 #  endif
 808 _GL_CXXALIAS_SYS (roundf, float, (float x));
 809 # endif
 810 _GL_CXXALIASWARN (roundf);
 811 #elif defined GNULIB_POSIXCHECK
 812 # undef roundf
 813 # if HAVE_RAW_DECL_ROUNDF
 814 _GL_WARN_ON_USE (roundf, "roundf is unportable - "
 815                  "use gnulib module roundf for portability");
 816 # endif
 817 #endif
 818
 819 #if @GNULIB_ROUND@
 820 # if @REPLACE_ROUND@
 821 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 822 #   undef round
 823 #   define round rpl_round
 824 #  endif
 825 _GL_FUNCDECL_RPL (round, double, (double x));
 826 _GL_CXXALIAS_RPL (round, double, (double x));
 827 # else
 828 #  if !@HAVE_DECL_ROUND@
 829 _GL_FUNCDECL_SYS (round, double, (double x));
 830 #  endif
 831 _GL_CXXALIAS_SYS (round, double, (double x));
 832 # endif
 833 _GL_CXXALIASWARN (round);
 834 #elif defined GNULIB_POSIXCHECK
 835 # undef round
 836 # if HAVE_RAW_DECL_ROUND
 837 _GL_WARN_ON_USE (round, "round is unportable - "
 838                  "use gnulib module round for portability");
 839 # endif
 840 #endif
 841
 842 #if @GNULIB_ROUNDL@
 843 # if @REPLACE_ROUNDL@
 844 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 845 #   undef roundl
 846 #   define roundl rpl_roundl
 847 #  endif
 848 _GL_FUNCDECL_RPL (roundl, long double, (long double x));
 849 _GL_CXXALIAS_RPL (roundl, long double, (long double x));
 850 # else
 851 #  if !@HAVE_DECL_ROUNDL@
 852 _GL_FUNCDECL_SYS (roundl, long double, (long double x));
 853 #  endif
 854 _GL_CXXALIAS_SYS (roundl, long double, (long double x));
 855 # endif
 856 _GL_CXXALIASWARN (roundl);
 857 #elif defined GNULIB_POSIXCHECK
 858 # undef roundl
 859 # if HAVE_RAW_DECL_ROUNDL
 860 _GL_WARN_ON_USE (roundl, "roundl is unportable - "
 861                  "use gnulib module roundl for portability");
 862 # endif
 863 #endif
 864
 865
 866 #if @GNULIB_SINF@
 867 # if !@HAVE_SINF@
 868 #  undef sinf
 869 _GL_FUNCDECL_SYS (sinf, float, (float x));
 870 # endif
 871 _GL_CXXALIAS_SYS (sinf, float, (float x));
 872 _GL_CXXALIASWARN (sinf);
 873 #elif defined GNULIB_POSIXCHECK
 874 # undef sinf
 875 # if HAVE_RAW_DECL_SINF
 876 _GL_WARN_ON_USE (sinf, "sinf is unportable - "
 877                  "use gnulib module sinf for portability");
 878 # endif
 879 #endif
 880
 881 #if @GNULIB_SINL@
 882 # if !@HAVE_SINL@ || !@HAVE_DECL_SINL@
 883 _GL_FUNCDECL_SYS (sinl, long double, (long double x));
 884 # endif
 885 _GL_CXXALIAS_SYS (sinl, long double, (long double x));
 886 _GL_CXXALIASWARN (sinl);
 887 #elif defined GNULIB_POSIXCHECK
 888 # undef sinl
 889 # if HAVE_RAW_DECL_SINL
 890 _GL_WARN_ON_USE (sinl, "sinl is unportable - "
 891                  "use gnulib module mathl for portability");
 892 # endif
 893 #endif
 894
 895
 896 #if @GNULIB_SINHF@
 897 # if !@HAVE_SINHF@
 898 #  undef sinhf
 899 _GL_FUNCDECL_SYS (sinhf, float, (float x));
 900 # endif
 901 _GL_CXXALIAS_SYS (sinhf, float, (float x));
 902 _GL_CXXALIASWARN (sinhf);
 903 #elif defined GNULIB_POSIXCHECK
 904 # undef sinhf
 905 # if HAVE_RAW_DECL_SINHF
 906 _GL_WARN_ON_USE (sinhf, "sinhf is unportable - "
 907                  "use gnulib module sinhf for portability");
 908 # endif
 909 #endif
 910
 911
 912 #if @GNULIB_SQRTF@
 913 # if !@HAVE_SQRTF@
 914 #  undef sqrtf
 915 _GL_FUNCDECL_SYS (sqrtf, float, (float x));
 916 # endif
 917 _GL_CXXALIAS_SYS (sqrtf, float, (float x));
 918 _GL_CXXALIASWARN (sqrtf);
 919 #elif defined GNULIB_POSIXCHECK
 920 # undef sqrtf
 921 # if HAVE_RAW_DECL_SQRTF
 922 _GL_WARN_ON_USE (sqrtf, "sqrtf is unportable - "
 923                  "use gnulib module sqrtf for portability");
 924 # endif
 925 #endif
 926
 927 #if @GNULIB_SQRTL@
 928 # if !@HAVE_SQRTL@ || !@HAVE_DECL_SQRTL@
 929 _GL_FUNCDECL_SYS (sqrtl, long double, (long double x));
 930 # endif
 931 _GL_CXXALIAS_SYS (sqrtl, long double, (long double x));
 932 _GL_CXXALIASWARN (sqrtl);
 933 #elif defined GNULIB_POSIXCHECK
 934 # undef sqrtl
 935 # if HAVE_RAW_DECL_SQRTL
 936 _GL_WARN_ON_USE (sqrtl, "sqrtl is unportable - "
 937                  "use gnulib module mathl for portability");
 938 # endif
 939 #endif
 940
 941
 942 #if @GNULIB_TANF@
 943 # if !@HAVE_TANF@
 944 #  undef tanf
 945 _GL_FUNCDECL_SYS (tanf, float, (float x));
 946 # endif
 947 _GL_CXXALIAS_SYS (tanf, float, (float x));
 948 _GL_CXXALIASWARN (tanf);
 949 #elif defined GNULIB_POSIXCHECK
 950 # undef tanf
 951 # if HAVE_RAW_DECL_TANF
 952 _GL_WARN_ON_USE (tanf, "tanf is unportable - "
 953                  "use gnulib module tanf for portability");
 954 # endif
 955 #endif
 956
 957 #if @GNULIB_TANL@
 958 # if !@HAVE_TANL@ || !@HAVE_DECL_TANL@
 959 _GL_FUNCDECL_SYS (tanl, long double, (long double x));
 960 # endif
 961 _GL_CXXALIAS_SYS (tanl, long double, (long double x));
 962 _GL_CXXALIASWARN (tanl);
 963 #elif defined GNULIB_POSIXCHECK
 964 # undef tanl
 965 # if HAVE_RAW_DECL_TANL
 966 _GL_WARN_ON_USE (tanl, "tanl is unportable - "
 967                  "use gnulib module mathl for portability");
 968 # endif
 969 #endif
 970
 971
 972 #if @GNULIB_TANHF@
 973 # if !@HAVE_TANHF@
 974 #  undef tanhf
 975 _GL_FUNCDECL_SYS (tanhf, float, (float x));
 976 # endif
 977 _GL_CXXALIAS_SYS (tanhf, float, (float x));
 978 _GL_CXXALIASWARN (tanhf);
 979 #elif defined GNULIB_POSIXCHECK
 980 # undef tanhf
 981 # if HAVE_RAW_DECL_TANHF
 982 _GL_WARN_ON_USE (tanhf, "tanhf is unportable - "
 983                  "use gnulib module tanhf for portability");
 984 # endif
 985 #endif
 986
 987
 988 #if @GNULIB_TRUNCF@
 989 # if @REPLACE_TRUNCF@
 990 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 991 #   define truncf rpl_truncf
 992 #  endif
 993 _GL_FUNCDECL_RPL (truncf, float, (float x));
 994 _GL_CXXALIAS_RPL (truncf, float, (float x));
 995 # else
 996 #  if !@HAVE_DECL_TRUNCF@
 997 _GL_FUNCDECL_SYS (truncf, float, (float x));
 998 #  endif
 999 _GL_CXXALIAS_SYS (truncf, float, (float x));
1000 # endif
1001 _GL_CXXALIASWARN (truncf);
1002 #elif defined GNULIB_POSIXCHECK
1003 # undef truncf
1004 # if HAVE_RAW_DECL_TRUNCF
1005 _GL_WARN_ON_USE (truncf, "truncf is unportable - "
1006                  "use gnulib module truncf for portability");
1007 # endif
1008 #endif
1009
1010 #if @GNULIB_TRUNC@
1011 # if @REPLACE_TRUNC@
1012 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1013 #   define trunc rpl_trunc
1014 #  endif
1015 _GL_FUNCDECL_RPL (trunc, double, (double x));
1016 _GL_CXXALIAS_RPL (trunc, double, (double x));
1017 # else
1018 #  if !@HAVE_DECL_TRUNC@
1019 _GL_FUNCDECL_SYS (trunc, double, (double x));
1020 #  endif
1021 _GL_CXXALIAS_SYS (trunc, double, (double x));
1022 # endif
1023 _GL_CXXALIASWARN (trunc);
1024 #elif defined GNULIB_POSIXCHECK
1025 # undef trunc
1026 # if HAVE_RAW_DECL_TRUNC
1027 _GL_WARN_ON_USE (trunc, "trunc is unportable - "
1028                  "use gnulib module trunc for portability");
1029 # endif
1030 #endif
1031
1032 #if @GNULIB_TRUNCL@
1033 # if @REPLACE_TRUNCL@
1034 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1035 #   undef truncl
1036 #   define truncl rpl_truncl
1037 #  endif
1038 _GL_FUNCDECL_RPL (truncl, long double, (long double x));
1039 _GL_CXXALIAS_RPL (truncl, long double, (long double x));
1040 # else
1041 #  if !@HAVE_DECL_TRUNCL@
1042 _GL_FUNCDECL_SYS (truncl, long double, (long double x));
1043 #  endif
1044 _GL_CXXALIAS_SYS (truncl, long double, (long double x));
1045 # endif
1046 _GL_CXXALIASWARN (truncl);
1047 #elif defined GNULIB_POSIXCHECK
1048 # undef truncl
1049 # if HAVE_RAW_DECL_TRUNCL
1050 _GL_WARN_ON_USE (truncl, "truncl is unportable - "
1051                  "use gnulib module truncl for portability");
1052 # endif
1053 #endif
1054
1055
1056 /* Definitions of function-like macros come here, after the function
1057    declarations.  */
1058
1059
1060 #if @GNULIB_ISFINITE@
1061 # if @REPLACE_ISFINITE@
1062 _GL_EXTERN_C int gl_isfinitef (float x);
1063 _GL_EXTERN_C int gl_isfinited (double x);
1064 _GL_EXTERN_C int gl_isfinitel (long double x);
1065 #  undef isfinite
1066 #  define isfinite(x) \
1067    (sizeof (x) == sizeof (long double) ? gl_isfinitel (x) : \
1068     sizeof (x) == sizeof (double) ? gl_isfinited (x) : \
1069     gl_isfinitef (x))
1070 # endif
1071 # ifdef __cplusplus
1072 #  ifdef isfinite
1073 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isfinite)
1074 #   undef isfinite
1075 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isfinite)
1076 #  endif
1077 # endif
1078 #elif defined GNULIB_POSIXCHECK
1079 # if defined isfinite
1080 _GL_WARN_REAL_FLOATING_DECL (isfinite);
1081 #  undef isfinite
1082 #  define isfinite(x) _GL_WARN_REAL_FLOATING_IMPL (isfinite, x)
1083 # endif
1084 #endif
1085
1086
1087 #if @GNULIB_ISINF@
1088 # if @REPLACE_ISINF@
1089 _GL_EXTERN_C int gl_isinff (float x);
1090 _GL_EXTERN_C int gl_isinfd (double x);
1091 _GL_EXTERN_C int gl_isinfl (long double x);
1092 #  undef isinf
1093 #  define isinf(x) \
1094    (sizeof (x) == sizeof (long double) ? gl_isinfl (x) : \
1095     sizeof (x) == sizeof (double) ? gl_isinfd (x) : \
1096     gl_isinff (x))
1097 # endif
1098 # ifdef __cplusplus
1099 #  ifdef isinf
1100 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isinf)
1101 #   undef isinf
1102 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isinf)
1103 #  endif
1104 # endif
1105 #elif defined GNULIB_POSIXCHECK
1106 # if defined isinf
1107 _GL_WARN_REAL_FLOATING_DECL (isinf);
1108 #  undef isinf
1109 #  define isinf(x) _GL_WARN_REAL_FLOATING_IMPL (isinf, x)
1110 # endif
1111 #endif
1112
1113
1114 #if @GNULIB_ISNANF@
1115 /* Test for NaN for 'float' numbers.  */
1116 # if @HAVE_ISNANF@
1117 /* The original <math.h> included above provides a declaration of isnan macro
1118    or (older) isnanf function.  */
1119 #  if __GNUC__ >= 4
1120     /* GCC 4.0 and newer provides three built-ins for isnan.  */
1121 #   undef isnanf
1122 #   define isnanf(x) __builtin_isnanf ((float)(x))
1123 #  elif defined isnan
1124 #   undef isnanf
1125 #   define isnanf(x) isnan ((float)(x))
1126 #  endif
1127 # else
1128 /* Test whether X is a NaN.  */
1129 #  undef isnanf
1130 #  define isnanf rpl_isnanf
1131 _GL_EXTERN_C int isnanf (float x);
1132 # endif
1133 #endif
1134
1135 #if @GNULIB_ISNAND@
1136 /* Test for NaN for 'double' numbers.
1137    This function is a gnulib extension, unlike isnan() which applied only
1138    to 'double' numbers earlier but now is a type-generic macro.  */
1139 # if @HAVE_ISNAND@
1140 /* The original <math.h> included above provides a declaration of isnan
1141    macro.  */
1142 #  if __GNUC__ >= 4
1143     /* GCC 4.0 and newer provides three built-ins for isnan.  */
1144 #   undef isnand
1145 #   define isnand(x) __builtin_isnan ((double)(x))
1146 #  else
1147 #   undef isnand
1148 #   define isnand(x) isnan ((double)(x))
1149 #  endif
1150 # else
1151 /* Test whether X is a NaN.  */
1152 #  undef isnand
1153 #  define isnand rpl_isnand
1154 _GL_EXTERN_C int isnand (double x);
1155 # endif
1156 #endif
1157
1158 #if @GNULIB_ISNANL@
1159 /* Test for NaN for 'long double' numbers.  */
1160 # if @HAVE_ISNANL@
1161 /* The original <math.h> included above provides a declaration of isnan
1162    macro or (older) isnanl function.  */
1163 #  if __GNUC__ >= 4
1164     /* GCC 4.0 and newer provides three built-ins for isnan.  */
1165 #   undef isnanl
1166 #   define isnanl(x) __builtin_isnanl ((long double)(x))
1167 #  elif defined isnan
1168 #   undef isnanl
1169 #   define isnanl(x) isnan ((long double)(x))
1170 #  endif
1171 # else
1172 /* Test whether X is a NaN.  */
1173 #  undef isnanl
1174 #  define isnanl rpl_isnanl
1175 _GL_EXTERN_C int isnanl (long double x);
1176 # endif
1177 #endif
1178
1179 /* This must come *after* the snippets for GNULIB_ISNANF and GNULIB_ISNANL!  */
1180 #if @GNULIB_ISNAN@
1181 # if @REPLACE_ISNAN@
1182 /* We can't just use the isnanf macro (e.g.) as exposed by
1183    isnanf.h (e.g.) here, because those may end up being macros
1184    that recursively expand back to isnan.  So use the gnulib
1185    replacements for them directly. */
1186 #  if @HAVE_ISNANF@ && __GNUC__ >= 4
1187 #   define gl_isnan_f(x) __builtin_isnanf ((float)(x))
1188 #  else
1189 _GL_EXTERN_C int rpl_isnanf (float x);
1190 #   define gl_isnan_f(x) rpl_isnanf (x)
1191 #  endif
1192 #  if @HAVE_ISNAND@ && __GNUC__ >= 4
1193 #   define gl_isnan_d(x) __builtin_isnan ((double)(x))
1194 #  else
1195 _GL_EXTERN_C int rpl_isnand (double x);
1196 #   define gl_isnan_d(x) rpl_isnand (x)
1197 #  endif
1198 #  if @HAVE_ISNANL@ && __GNUC__ >= 4
1199 #   define gl_isnan_l(x) __builtin_isnanl ((long double)(x))
1200 #  else
1201 _GL_EXTERN_C int rpl_isnanl (long double x);
1202 #   define gl_isnan_l(x) rpl_isnanl (x)
1203 #  endif
1204 #  undef isnan
1205 #  define isnan(x) \
1206    (sizeof (x) == sizeof (long double) ? gl_isnan_l (x) : \
1207     sizeof (x) == sizeof (double) ? gl_isnan_d (x) : \
1208     gl_isnan_f (x))
1209 # elif __GNUC__ >= 4
1210 #  undef isnan
1211 #  define isnan(x) \
1212    (sizeof (x) == sizeof (long double) ? __builtin_isnanl ((long double)(x)) : \
1213     sizeof (x) == sizeof (double) ? __builtin_isnan ((double)(x)) : \
1214     __builtin_isnanf ((float)(x)))
1215 # endif
1216 # ifdef __cplusplus
1217 #  ifdef isnan
1218 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isnan)
1219 #   undef isnan
1220 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isnan)
1221 #  endif
1222 # else
1223 /* Ensure isnan is a macro.  */
1224 #  ifndef isnan
1225 #   define isnan isnan
1226 #  endif
1227 # endif
1228 #elif defined GNULIB_POSIXCHECK
1229 # if defined isnan
1230 _GL_WARN_REAL_FLOATING_DECL (isnan);
1231 #  undef isnan
1232 #  define isnan(x) _GL_WARN_REAL_FLOATING_IMPL (isnan, x)
1233 # endif
1234 #endif
1235
1236
1237 #if @GNULIB_SIGNBIT@
1238 # if @REPLACE_SIGNBIT_USING_GCC@
1239 #  undef signbit
1240    /* GCC 4.0 and newer provides three built-ins for signbit.  */
1241 #  define signbit(x) \
1242    (sizeof (x) == sizeof (long double) ? __builtin_signbitl (x) : \
1243     sizeof (x) == sizeof (double) ? __builtin_signbit (x) : \
1244     __builtin_signbitf (x))
1245 # endif
1246 # if @REPLACE_SIGNBIT@
1247 #  undef signbit
1248 _GL_EXTERN_C int gl_signbitf (float arg);
1249 _GL_EXTERN_C int gl_signbitd (double arg);
1250 _GL_EXTERN_C int gl_signbitl (long double arg);
1251 #  if __GNUC__ >= 2 && !defined __STRICT_ANSI__
1252 #   define _GL_NUM_UINT_WORDS(type) \
1253       ((sizeof (type) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
1254 #   if defined FLT_SIGNBIT_WORD && defined FLT_SIGNBIT_BIT && !defined gl_signbitf
1255 #    define gl_signbitf_OPTIMIZED_MACRO
1256 #    define gl_signbitf(arg) \
1257        ({ union { float _value;                                         \
1258                   unsigned int _word[_GL_NUM_UINT_WORDS (float)];       \
1259                 } _m;                                                   \
1260           _m._value = (arg);                                            \
1261           (_m._word[FLT_SIGNBIT_WORD] >> FLT_SIGNBIT_BIT) & 1;          \
1262         })
1263 #   endif
1264 #   if defined DBL_SIGNBIT_WORD && defined DBL_SIGNBIT_BIT && !defined gl_signbitd
1265 #    define gl_signbitd_OPTIMIZED_MACRO
1266 #    define gl_signbitd(arg) \
1267        ({ union { double _value;                                        \
1268                   unsigned int _word[_GL_NUM_UINT_WORDS (double)];      \
1269                 } _m;                                                   \
1270           _m._value = (arg);                                            \
1271           (_m._word[DBL_SIGNBIT_WORD] >> DBL_SIGNBIT_BIT) & 1;          \
1272         })
1273 #   endif
1274 #   if defined LDBL_SIGNBIT_WORD && defined LDBL_SIGNBIT_BIT && !defined gl_signbitl
1275 #    define gl_signbitl_OPTIMIZED_MACRO
1276 #    define gl_signbitl(arg) \
1277        ({ union { long double _value;                                   \
1278                   unsigned int _word[_GL_NUM_UINT_WORDS (long double)]; \
1279                 } _m;                                                   \
1280           _m._value = (arg);                                            \
1281           (_m._word[LDBL_SIGNBIT_WORD] >> LDBL_SIGNBIT_BIT) & 1;        \
1282         })
1283 #   endif
1284 #  endif
1285 #  define signbit(x) \
1286    (sizeof (x) == sizeof (long double) ? gl_signbitl (x) : \
1287     sizeof (x) == sizeof (double) ? gl_signbitd (x) : \
1288     gl_signbitf (x))
1289 # endif
1290 # ifdef __cplusplus
1291 #  ifdef signbit
1292 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (signbit)
1293 #   undef signbit
1294 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (signbit)
1295 #  endif
1296 # endif
1297 #elif defined GNULIB_POSIXCHECK
1298 # if defined signbit
1299 _GL_WARN_REAL_FLOATING_DECL (signbit);
1300 #  undef signbit
1301 #  define signbit(x) _GL_WARN_REAL_FLOATING_IMPL (signbit, x)
1302 # endif
1303 #endif
1304
1305
1306 #endif /* _@GUARD_PREFIX@_MATH_H */
1307 #endif /* _@GUARD_PREFIX@_MATH_H */