1 /* A GNU-like <math.h>.
3 Copyright (C) 2002-2003, 2007 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 2, or (at your option)
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, write to the Free Software Foundation,
17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
21 /* The include_next requires a split double-inclusion guard. */
22 #@INCLUDE_NEXT@ @NEXT_MATH_H@
28 /* The definition of GL_LINK_WARNING is copied here. */
39 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
40 If x is zero: mantissa = x, exp = 0.
41 If x is infinite or NaN: mantissa = x, exp unspecified.
42 Store exp and return mantissa. */
45 # define frexp rpl_frexp
46 extern double frexp (double x, int *exp);
48 #elif defined GNULIB_POSIXCHECK
51 (GL_LINK_WARNING ("frexp is unportable - " \
52 "use gnulib module frexp for portability"), \
57 #if @GNULIB_MATHL@ || !@HAVE_DECL_ACOSL@
58 extern long double acosl (long double x);
60 #if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
63 (GL_LINK_WARNING ("acosl is unportable - " \
64 "use gnulib module mathl for portability"), \
68 #if @GNULIB_MATHL@ || !@HAVE_DECL_ASINL@
69 extern long double asinl (long double x);
71 #if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
74 (GL_LINK_WARNING ("asinl is unportable - " \
75 "use gnulib module mathl for portability"), \
79 #if @GNULIB_MATHL@ || !@HAVE_DECL_ATANL@
80 extern long double atanl (long double x);
82 #if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
85 (GL_LINK_WARNING ("atanl is unportable - " \
86 "use gnulib module mathl for portability"), \
90 #if @GNULIB_MATHL@ || !@HAVE_DECL_CEILL@
91 extern long double ceill (long double x);
93 #if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
96 (GL_LINK_WARNING ("ceill is unportable - " \
97 "use gnulib module mathl for portability"), \
101 #if @GNULIB_MATHL@ || !@HAVE_DECL_COSL@
102 extern long double cosl (long double x);
104 #if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
107 (GL_LINK_WARNING ("cosl is unportable - " \
108 "use gnulib module mathl for portability"), \
112 #if @GNULIB_MATHL@ || !@HAVE_DECL_EXPL@
113 extern long double expl (long double x);
115 #if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
118 (GL_LINK_WARNING ("expl is unportable - " \
119 "use gnulib module mathl for portability"), \
123 #if @GNULIB_MATHL@ || !@HAVE_DECL_FLOORL@
124 extern long double floorl (long double x);
126 #if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
129 (GL_LINK_WARNING ("floorl is unportable - " \
130 "use gnulib module mathl for portability"), \
137 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
138 If x is zero: mantissa = x, exp = 0.
139 If x is infinite or NaN: mantissa = x, exp unspecified.
140 Store exp and return mantissa. */
141 #if @GNULIB_FREXPL@ && @REPLACE_FREXPL@
142 # define frexpl rpl_frexpl
144 #if (@GNULIB_FREXPL@ && @REPLACE_FREXPL@) || !@HAVE_DECL_FREXPL@
145 extern long double frexpl (long double x, int *exp);
147 #if !@GNULIB_FREXPL@ && defined GNULIB_POSIXCHECK
149 # define frexpl(x,e) \
150 (GL_LINK_WARNING ("frexpl is unportable - " \
151 "use gnulib module frexpl for portability"), \
155 /* Return x * 2^exp. */
156 #if @GNULIB_LDEXPL@ && @REPLACE_LDEXPL@
157 # define ldexpl rpl_ldexpl
159 #if (@GNULIB_LDEXPL@ && @REPLACE_LDEXPL@) || !@HAVE_DECL_LDEXPL@
160 extern long double ldexpl (long double x, int exp);
162 #if !@GNULIB_LDEXPL@ && defined GNULIB_POSIXCHECK
164 # define ldexpl(x,e) \
165 (GL_LINK_WARNING ("ldexpl is unportable - " \
166 "use gnulib module ldexpl for portability"), \
170 #if @GNULIB_MATHL@ || !@HAVE_DECL_LOGL@
171 extern long double logl (long double x);
173 #if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
176 (GL_LINK_WARNING ("logl is unportable - " \
177 "use gnulib module mathl for portability"), \
181 #if @GNULIB_MATHL@ || !@HAVE_DECL_SINL@
182 extern long double sinl (long double x);
184 #if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
187 (GL_LINK_WARNING ("sinl is unportable - " \
188 "use gnulib module mathl for portability"), \
192 #if @GNULIB_MATHL@ || !@HAVE_DECL_SQRTL@
193 extern long double sqrtl (long double x);
195 #if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
198 (GL_LINK_WARNING ("sqrtl is unportable - " \
199 "use gnulib module mathl for portability"), \
203 #if @GNULIB_MATHL@ || !@HAVE_DECL_TANL@
204 extern long double tanl (long double x);
206 #if !@GNULIB_MATHL@ && defined GNULIB_POSIXCHECK
209 (GL_LINK_WARNING ("tanl is unportable - " \
210 "use gnulib module mathl for portability"), \
215 # if !@HAVE_DECL_TRUNC@
216 # define trunc rpl_trunc
217 extern double trunc (double x);
219 #elif defined GNULIB_POSIXCHECK
222 (GL_LINK_WARNING ("trunc is unportable - " \
223 "use gnulib module trunc for portability"), \
229 # if @REPLACE_SIGNBIT@
231 extern int gl_signbitf (float arg);
232 extern int gl_signbitd (double arg);
233 extern int gl_signbitl (long double arg);
234 # if __GNUC__ >= 2 && !__STRICT_ANSI__
235 # if defined FLT_SIGNBIT_WORD && defined FLT_SIGNBIT_BIT
236 # define gl_signbitf(arg) \
237 ({ union { float _value; \
238 unsigned int _word[(sizeof (float) + sizeof (unsigned int) - 1) / sizeof (unsigned int)]; \
241 (_m._word[FLT_SIGNBIT_WORD] >> FLT_SIGNBIT_BIT) & 1; \
244 # if defined DBL_SIGNBIT_WORD && defined DBL_SIGNBIT_BIT
245 # define gl_signbitd(arg) \
246 ({ union { double _value; \
247 unsigned int _word[(sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int)]; \
250 (_m._word[DBL_SIGNBIT_WORD] >> DBL_SIGNBIT_BIT) & 1; \
253 # if defined LDBL_SIGNBIT_WORD && defined LDBL_SIGNBIT_BIT
254 # define gl_signbitl(arg) \
255 ({ union { long double _value; \
256 unsigned int _word[(sizeof (long double) + sizeof (unsigned int) - 1) / sizeof (unsigned int)]; \
259 (_m._word[LDBL_SIGNBIT_WORD] >> LDBL_SIGNBIT_BIT) & 1; \
263 # define signbit(x) \
264 (sizeof (x) == sizeof (long double) ? gl_signbitl (x) : \
265 sizeof (x) == sizeof (double) ? gl_signbitd (x) : \
268 #elif defined GNULIB_POSIXCHECK
269 /* How to override a macro? */
277 #endif /* _GL_MATH_H */
278 #endif /* _GL_MATH_H */