4073a59300
casinhl.c catanl.c catanhl.c ccosl.c ccoshl.c cexpl.c cimagl.c clogl.c cpowl.c cprojl.c creall.c csinl.c csinhl.c csqrtl.c ctanl.c ctanhl.c): New files. * mingwex/Makefile.in (COMPLEX_DISTFILES): Adjust. (COMPLEX_OBJS): Adjust. * include/complex.h (cabsl, cacosl, cacoshl, cargl, casinf. casinhl, catanl, catanhl, ccosl, ccoshl, cexpl, cimagl, clogl, cpowl, cprojl, creall, csinl, csinhl, csqrtl, ctanl, ctanhl): Declare.
42 lines
815 B
C
Executable File
42 lines
815 B
C
Executable File
/* ctanl.c */
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/*
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Contributed by Danny Smith
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2005-01-04
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*/
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#include <math.h>
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#include <complex.h>
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#include <errno.h>
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/* ctan (x + I * y) = (sin (2 * x) + I * sinh(2 * y))
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/ (cos (2 * x) + cosh (2 * y)) */
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long double complex ctanl (long double complex Z)
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{
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long double complex Res;
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long double two_I = 2.0L * __imag__ Z;
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long double two_R = 2.0L * __real__ Z;
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long double denom = cosl (two_R) + coshl (two_I);
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if (denom == 0.0L)
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{
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errno = ERANGE;
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__real__ Res = HUGE_VALL;
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__imag__ Res = HUGE_VALL;
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}
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else if (isinf (denom))
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{
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errno = ERANGE;
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__real__ Res = 0.0;
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__imag__ Res = two_I > 0 ? 1.0L : -1.0L;
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}
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else
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{
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__real__ Res = sinl (two_R) / denom;
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__imag__ Res = sinhl (two_I) / denom;
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}
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return Res;
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}
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