--- /dev/null
+/*
+ * Copyright (c) 1999
+ * Silicon Graphics Computer Systems, Inc.
+ *
+ * Copyright (c) 1999
+ * Boris Fomitchev
+ *
+ * This material is provided "as is", with absolutely no warranty expressed
+ * or implied. Any use is at your own risk.
+ *
+ * Permission to use or copy this software for any purpose is hereby granted
+ * without fee, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ *
+ */
+#include "stlport_prefix.h"
+
+
+// Trigonometric and hyperbolic functions for complex<float>,
+// complex<double>, and complex<long double>
+#include <complex>
+#include <cfloat>
+#include <cmath>
+
+_STLP_BEGIN_NAMESPACE
+
+
+//----------------------------------------------------------------------
+// helpers
+#if defined (__sgi)
+ static const union { unsigned int i; float f; } float_ulimit = { 0x42b2d4fc };
+ static const float float_limit = float_ulimit.f;
+ static union {
+ struct { unsigned int h; unsigned int l; } w;
+ double d;
+ } double_ulimit = { 0x408633ce, 0x8fb9f87d };
+ static const double double_limit = double_ulimit.d;
+ static union {
+ struct { unsigned int h[2]; unsigned int l[2]; } w;
+ long double ld;
+ } ldouble_ulimit = {0x408633ce, 0x8fb9f87e, 0xbd23b659, 0x4e9bd8b1};
+# if !defined (_STLP_NO_LONG_DOUBLE)
+ static const long double ldouble_limit = ldouble_ulimit.ld;
+# endif
+#else
+# if defined (M_LN2) && defined (FLT_MAX_EXP)
+ static const float float_limit = float(M_LN2 * FLT_MAX_EXP);
+ static const double double_limit = M_LN2 * DBL_MAX_EXP;
+# else
+ static const float float_limit = ::log(FLT_MAX);
+ static const double double_limit = ::log(DBL_MAX);
+# endif
+# if !defined (_STLP_NO_LONG_DOUBLE)
+# if defined (M_LN2l)
+ static const long double ldouble_limit = M_LN2l * LDBL_MAX_EXP;
+# else
+ static const long double ldouble_limit = ::log(LDBL_MAX);
+# endif
+# endif
+#endif
+
+
+//----------------------------------------------------------------------
+// sin
+template <class _Tp>
+static complex<_Tp> sinT(const complex<_Tp>& z) {
+ return complex<_Tp>(::sin(z._M_re) * ::cosh(z._M_im),
+ ::cos(z._M_re) * ::sinh(z._M_im));
+}
+
+_STLP_DECLSPEC complex<float> _STLP_CALL sin(const complex<float>& z)
+{ return sinT(z); }
+
+_STLP_DECLSPEC complex<double> _STLP_CALL sin(const complex<double>& z)
+{ return sinT(z); }
+
+#if !defined (_STLP_NO_LONG_DOUBLE)
+_STLP_DECLSPEC complex<long double> _STLP_CALL sin(const complex<long double>& z)
+{ return sinT(z); }
+#endif
+
+//----------------------------------------------------------------------
+// cos
+template <class _Tp>
+static complex<_Tp> cosT(const complex<_Tp>& z) {
+ return complex<_Tp>(::cos(z._M_re) * ::cosh(z._M_im),
+ -::sin(z._M_re) * ::sinh(z._M_im));
+}
+
+_STLP_DECLSPEC complex<float> _STLP_CALL cos(const complex<float>& z)
+{ return cosT(z); }
+
+_STLP_DECLSPEC complex<double> _STLP_CALL cos(const complex<double>& z)
+{ return cosT(z); }
+
+#if !defined (_STLP_NO_LONG_DOUBLE)
+_STLP_DECLSPEC complex<long double> _STLP_CALL cos(const complex<long double>& z)
+{ return cosT(z); }
+#endif
+
+//----------------------------------------------------------------------
+// tan
+template <class _Tp>
+static complex<_Tp> tanT(const complex<_Tp>& z, const _Tp& Tp_limit) {
+ _Tp re2 = 2.f * z._M_re;
+ _Tp im2 = 2.f * z._M_im;
+
+ if (::abs(im2) > Tp_limit)
+ return complex<_Tp>(0.f, (im2 > 0 ? 1.f : -1.f));
+ else {
+ _Tp den = ::cos(re2) + ::cosh(im2);
+ return complex<_Tp>(::sin(re2) / den, ::sinh(im2) / den);
+ }
+}
+
+_STLP_DECLSPEC complex<float> _STLP_CALL tan(const complex<float>& z)
+{ return tanT(z, float_limit); }
+
+_STLP_DECLSPEC complex<double> _STLP_CALL tan(const complex<double>& z)
+{ return tanT(z, double_limit); }
+
+#if !defined (_STLP_NO_LONG_DOUBLE)
+_STLP_DECLSPEC complex<long double> _STLP_CALL tan(const complex<long double>& z)
+{ return tanT(z, ldouble_limit); }
+#endif
+
+//----------------------------------------------------------------------
+// sinh
+template <class _Tp>
+static complex<_Tp> sinhT(const complex<_Tp>& z) {
+ return complex<_Tp>(::sinh(z._M_re) * ::cos(z._M_im),
+ ::cosh(z._M_re) * ::sin(z._M_im));
+}
+
+_STLP_DECLSPEC complex<float> _STLP_CALL sinh(const complex<float>& z)
+{ return sinhT(z); }
+
+_STLP_DECLSPEC complex<double> _STLP_CALL sinh(const complex<double>& z)
+{ return sinhT(z); }
+
+#if !defined (_STLP_NO_LONG_DOUBLE)
+_STLP_DECLSPEC complex<long double> _STLP_CALL sinh(const complex<long double>& z)
+{ return sinhT(z); }
+#endif
+
+//----------------------------------------------------------------------
+// cosh
+template <class _Tp>
+static complex<_Tp> coshT(const complex<_Tp>& z) {
+ return complex<_Tp>(::cosh(z._M_re) * ::cos(z._M_im),
+ ::sinh(z._M_re) * ::sin(z._M_im));
+}
+
+_STLP_DECLSPEC complex<float> _STLP_CALL cosh(const complex<float>& z)
+{ return coshT(z); }
+
+_STLP_DECLSPEC complex<double> _STLP_CALL cosh(const complex<double>& z)
+{ return coshT(z); }
+
+#if !defined (_STLP_NO_LONG_DOUBLE)
+_STLP_DECLSPEC complex<long double> _STLP_CALL cosh(const complex<long double>& z)
+{ return coshT(z); }
+#endif
+
+//----------------------------------------------------------------------
+// tanh
+template <class _Tp>
+static complex<_Tp> tanhT(const complex<_Tp>& z, const _Tp& Tp_limit) {
+ _Tp re2 = 2.f * z._M_re;
+ _Tp im2 = 2.f * z._M_im;
+ if (::abs(re2) > Tp_limit)
+ return complex<_Tp>((re2 > 0 ? 1.f : -1.f), 0.f);
+ else {
+ _Tp den = ::cosh(re2) + ::cos(im2);
+ return complex<_Tp>(::sinh(re2) / den, ::sin(im2) / den);
+ }
+}
+
+_STLP_DECLSPEC complex<float> _STLP_CALL tanh(const complex<float>& z)
+{ return tanhT(z, float_limit); }
+
+_STLP_DECLSPEC complex<double> _STLP_CALL tanh(const complex<double>& z)
+{ return tanhT(z, double_limit); }
+
+#if !defined (_STLP_NO_LONG_DOUBLE)
+_STLP_DECLSPEC complex<long double> _STLP_CALL tanh(const complex<long double>& z)
+{ return tanhT(z, ldouble_limit); }
+#endif
+
+_STLP_END_NAMESPACE
projects / polintos / scott / priv.git / blobdiff