Update copyright dates with scripts/update-copyrights.

[thirdparty/glibc.git] / math / math.h

diff --git a/math/math.h b/math/math.h
index d6e4d01f9d6150cdf27f52532e47ac90de6bac57..c7ff16971e98662081e3192a1269038e9419af59 100644 (file)
--- a/math/math.h
+++ b/math/math.h
@@ -1,6 +1,5 @@
 /* Declarations for math functions.
-   Copyright (C) 1991-1993, 1995-1999, 2001, 2002, 2004, 2006, 2009, 2011, 2012
-   Free Software Foundation, Inc.
+   Copyright (C) 1991-2015 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -14,9 +13,8 @@
    Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
 
 /*
  *     ISO C99 Standard: 7.12 Mathematics      <math.h>
@@ -74,7 +72,7 @@ __BEGIN_DECLS
 #undef _Mdouble_END_NAMESPACE
 #undef __MATH_PRECNAME
 
-#if defined __USE_MISC || defined __USE_ISOC99
+#ifdef __USE_ISOC99
 
 
 /* Include the file of declarations again, this time using `float'
@@ -94,7 +92,8 @@ __BEGIN_DECLS
 # undef        __MATH_PRECNAME
 
 # if !(defined __NO_LONG_DOUBLE_MATH && defined _LIBC) \
-     || defined __LDBL_COMPAT
+     || defined __LDBL_COMPAT \
+     || defined _LIBC_TEST
 #  ifdef __LDBL_COMPAT
 
 #   ifdef __USE_ISOC99
@@ -139,7 +138,7 @@ extern long double __REDIRECT_NTH (nexttowardl,
 
 # endif /* !(__NO_LONG_DOUBLE_MATH && _LIBC) || __LDBL_COMPAT */
 
-#endif /* Use misc or ISO C99.  */
+#endif /* Use ISO C99.  */
 #undef __MATHDECL_1
 #undef __MATHDECL
 #undef __MATHCALL
@@ -190,16 +189,21 @@ extern int signgam;
 /* All floating-point numbers can be put in one of these categories.  */
 enum
   {
-    FP_NAN,
-# define FP_NAN FP_NAN
-    FP_INFINITE,
-# define FP_INFINITE FP_INFINITE
-    FP_ZERO,
-# define FP_ZERO FP_ZERO
-    FP_SUBNORMAL,
-# define FP_SUBNORMAL FP_SUBNORMAL
-    FP_NORMAL
-# define FP_NORMAL FP_NORMAL
+    FP_NAN =
+# define FP_NAN 0
+      FP_NAN,
+    FP_INFINITE =
+# define FP_INFINITE 1
+      FP_INFINITE,
+    FP_ZERO =
+# define FP_ZERO 2
+      FP_ZERO,
+    FP_SUBNORMAL =
+# define FP_SUBNORMAL 3
+      FP_SUBNORMAL,
+    FP_NORMAL =
+# define FP_NORMAL 4
+      FP_NORMAL
   };
 
 /* Return number of classification appropriate for X.  */
@@ -279,6 +283,20 @@ enum
 
 #endif /* Use ISO C99.  */
 
+#ifdef __USE_GNU
+/* Return nonzero value if X is a signaling NaN.  */
+# ifdef __NO_LONG_DOUBLE_MATH
+#  define issignaling(x) \
+     (sizeof (x) == sizeof (float) ? __issignalingf (x) : __issignaling (x))
+# else
+#  define issignaling(x) \
+     (sizeof (x) == sizeof (float)                                           \
+      ? __issignalingf (x)                                                   \
+      : sizeof (x) == sizeof (double)                                        \
+      ? __issignaling (x) : __issignalingl (x))
+# endif
+#endif /* Use GNU.  */
+
 #ifdef __USE_MISC
 /* Support for various different standard error handling behaviors.  */
 typedef enum
@@ -297,7 +315,7 @@ extern _LIB_VERSION_TYPE _LIB_VERSION;
 #endif
 
 
-#ifdef __USE_SVID
+#ifdef __USE_MISC
 /* In SVID error handling, `matherr' is called with this description
    of the exceptional condition.
 
@@ -335,18 +353,18 @@ extern int matherr (struct exception *__exc);
 /* SVID mode specifies returning this large value instead of infinity.  */
 # define HUGE          3.40282347e+38F
 
-#else  /* !SVID */
+#else  /* !Misc.  */
 
 # ifdef __USE_XOPEN
 /* X/Open wants another strange constant.  */
 #  define MAXFLOAT     3.40282347e+38F
 # endif
 
-#endif /* SVID */
+#endif /* Misc.  */
 
 
 /* Some useful constants.  */
-#if defined __USE_BSD || defined __USE_XOPEN
+#if defined __USE_MISC || defined __USE_XOPEN
 # define M_E           2.7182818284590452354   /* e */
 # define M_LOG2E       1.4426950408889634074   /* log_2 e */
 # define M_LOG10E      0.43429448190325182765  /* log_10 e */
@@ -366,19 +384,19 @@ extern int matherr (struct exception *__exc);
    Therefore we provide as an extension constants with similar names as a
    GNU extension.  Provide enough digits for the 128-bit IEEE quad.  */
 #ifdef __USE_GNU
-# define M_El          2.7182818284590452353602874713526625L  /* e */
-# define M_LOG2El      1.4426950408889634073599246810018921L  /* log_2 e */
-# define M_LOG10El     0.4342944819032518276511289189166051L  /* log_10 e */
-# define M_LN2l                0.6931471805599453094172321214581766L  /* log_e 2 */
-# define M_LN10l       2.3025850929940456840179914546843642L  /* log_e 10 */
-# define M_PIl         3.1415926535897932384626433832795029L  /* pi */
-# define M_PI_2l       1.5707963267948966192313216916397514L  /* pi/2 */
-# define M_PI_4l       0.7853981633974483096156608458198757L  /* pi/4 */
-# define M_1_PIl       0.3183098861837906715377675267450287L  /* 1/pi */
-# define M_2_PIl       0.6366197723675813430755350534900574L  /* 2/pi */
-# define M_2_SQRTPIl   1.1283791670955125738961589031215452L  /* 2/sqrt(pi) */
-# define M_SQRT2l      1.4142135623730950488016887242096981L  /* sqrt(2) */
-# define M_SQRT1_2l    0.7071067811865475244008443621048490L  /* 1/sqrt(2) */
+# define M_El          2.718281828459045235360287471352662498L /* e */
+# define M_LOG2El      1.442695040888963407359924681001892137L /* log_2 e */
+# define M_LOG10El     0.434294481903251827651128918916605082L /* log_10 e */
+# define M_LN2l                0.693147180559945309417232121458176568L /* log_e 2 */
+# define M_LN10l       2.302585092994045684017991454684364208L /* log_e 10 */
+# define M_PIl         3.141592653589793238462643383279502884L /* pi */
+# define M_PI_2l       1.570796326794896619231321691639751442L /* pi/2 */
+# define M_PI_4l       0.785398163397448309615660845819875721L /* pi/4 */
+# define M_1_PIl       0.318309886183790671537767526745028724L /* 1/pi */
+# define M_2_PIl       0.636619772367581343075535053490057448L /* 2/pi */
+# define M_2_SQRTPIl   1.128379167095512573896158903121545172L /* 2/sqrt(pi) */
+# define M_SQRT2l      1.414213562373095048801688724209698079L /* sqrt(2) */
+# define M_SQRT1_2l    0.707106781186547524400844362104849039L /* 1/sqrt(2) */
 #endif