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+
+/* @(#)w_sinh.c 5.1 93/09/24 */
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+
+/*
+FUNCTION
+ <<sinh>>, <<sinhf>>---hyperbolic sine
+
+INDEX
+ sinh
+INDEX
+ sinhf
+
+ANSI_SYNOPSIS
+ #include <math.h>
+ double sinh(double <[x]>);
+ float sinhf(float <[x]>);
+
+TRAD_SYNOPSIS
+ #include <math.h>
+ double sinh(<[x]>)
+ double <[x]>;
+
+ float sinhf(<[x]>)
+ float <[x]>;
+
+DESCRIPTION
+ <<sinh>> computes the hyperbolic sine of the argument <[x]>.
+ Angles are specified in radians. <<sinh>>(<[x]>) is defined as
+ @ifinfo
+ . (exp(<[x]>) - exp(-<[x]>))/2
+ @end ifinfo
+ @tex
+ $${e^x - e^{-x}}\over 2$$
+ @end tex
+
+ <<sinhf>> is identical, save that it takes and returns <<float>> values.
+
+RETURNS
+ The hyperbolic sine of <[x]> is returned.
+
+ When the correct result is too large to be representable (an
+ overflow), <<sinh>> returns <<HUGE_VAL>> with the
+ appropriate sign, and sets the global value <<errno>> to
+ <<ERANGE>>.
+
+ You can modify error handling for these functions with <<matherr>>.
+
+PORTABILITY
+ <<sinh>> is ANSI C.
+ <<sinhf>> is an extension.
+
+QUICKREF
+ sinh ansi pure
+ sinhf - pure
+*/
+
+/*
+ * wrapper sinh(x)
+ */
+
+#include "fdlibm.h"
+#include <errno.h>
+
+#ifndef _DOUBLE_IS_32BITS
+
+#ifdef __STDC__
+ double sinh(double x) /* wrapper sinh */
+#else
+ double sinh(x) /* wrapper sinh */
+ double x;
+#endif
+{
+#ifdef _IEEE_LIBM
+ return __ieee754_sinh(x);
+#else
+ double z;
+ struct exception exc;
+ z = __ieee754_sinh(x);
+ if(_LIB_VERSION == _IEEE_) return z;
+ if(!finite(z)&&finite(x)) {
+ /* sinh(finite) overflow */
+#ifndef HUGE_VAL
+#define HUGE_VAL inf
+ double inf = 0.0;
+
+ SET_HIGH_WORD(inf,0x7ff00000); /* set inf to infinite */
+#endif
+ exc.type = OVERFLOW;
+ exc.name = "sinh";
+ exc.err = 0;
+ exc.arg1 = exc.arg2 = x;
+ if (_LIB_VERSION == _SVID_)
+ exc.retval = ( (x>0.0) ? HUGE : -HUGE);
+ else
+ exc.retval = ( (x>0.0) ? HUGE_VAL : -HUGE_VAL);
+ if (_LIB_VERSION == _POSIX_)
+ errno = ERANGE;
+ else if (!matherr(&exc)) {
+ errno = ERANGE;
+ }
+ if (exc.err != 0)
+ errno = exc.err;
+ return exc.retval;
+ } else
+ return z;
+#endif
+}
+
+#endif /* defined(_DOUBLE_IS_32BITS) */