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73 lines
1.6 KiB
C
73 lines
1.6 KiB
C
/* -*- Mode: C; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/* vim: set filetype=c tabstop=2 shiftwidth=2 expandtab: */
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/*
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* sin.d - trascendental functions: sine
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*
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* Copyright (c) 1984 Taiichi Yuasa and Masami Hagiya
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* Copyright (c) 1990 Giuseppe Attardi
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* Copyright (c) 2001 Juan Jose Garcia Ripoll
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*
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* See file 'LICENSE' for the copyright details.
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*
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*/
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#define ECL_INCLUDE_MATH_H
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#include <ecl/ecl.h>
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#include <ecl/internal.h>
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#include <ecl/impl/math_dispatch.h>
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#pragma STDC FENV_ACCESS ON
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cl_object
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cl_sin(cl_object x)
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{
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@(return ecl_sin(x));
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}
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static cl_object
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ecl_sin_rational(cl_object x)
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{
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return ecl_make_single_float(sinf(ecl_to_float(x)));
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}
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static cl_object
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ecl_sin_single_float(cl_object x)
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{
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return ecl_make_single_float(sinf(ecl_single_float(x)));
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}
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static cl_object
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ecl_sin_double_float(cl_object x)
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{
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return ecl_make_double_float(sin(ecl_double_float(x)));
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}
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#ifdef ECL_LONG_FLOAT
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static cl_object
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ecl_sin_long_float(cl_object x)
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{
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return ecl_make_long_float(sinl(ecl_long_float(x)));
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}
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#endif
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static cl_object
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ecl_sin_complex(cl_object x)
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{
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/*
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z = x + I y
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z = x + I y
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sin(z) = sinh(I z) = sinh(-y + I x)
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*/
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cl_object dx = x->complex.real;
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cl_object dy = x->complex.imag;
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cl_object a = ecl_times(ecl_sin(dx), ecl_cosh(dy));
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cl_object b = ecl_times(ecl_cos(dx), ecl_sinh(dy));
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return ecl_make_complex(a, b);
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}
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MATH_DEF_DISPATCH1(sin, @[sin], @[number],
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ecl_sin_rational, ecl_sin_rational, ecl_sin_rational,
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ecl_sin_single_float, ecl_sin_double_float, ecl_sin_long_float,
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ecl_sin_complex);
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