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glibc  2.9
Functions
s_ccoshl.c File Reference
#include <complex.h>
#include <fenv.h>
#include <math.h>
#include "math_private.h"
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Functions

__complex__ long double __ccoshl (__complex__ long double x)

Function Documentation

__complex__ long double __ccoshl ( __complex__ long double  x)

Definition at line 29 of file s_ccoshl.c.

{
  __complex__ long double retval;
  int rcls = fpclassify (__real__ x);
  int icls = fpclassify (__imag__ x);

  if (rcls >= FP_ZERO)
    {
      /* Real part is finite.  */
      if (icls >= FP_ZERO)
       {
         /* Imaginary part is finite.  */
         long double sinh_val = __ieee754_sinhl (__real__ x);
         long double cosh_val = __ieee754_coshl (__real__ x);
         long double sinix, cosix;

         __sincosl (__imag__ x, &sinix, &cosix);

         __real__ retval = cosh_val * cosix;
         __imag__ retval = sinh_val * sinix;
       }
      else
       {
         __imag__ retval = __real__ x == 0.0 ? 0.0 : __nanl ("");
         __real__ retval = __nanl ("") + __nanl ("");

#ifdef FE_INVALID
         if (icls == FP_INFINITE)
           feraiseexcept (FE_INVALID);
#endif
       }
    }
  else if (rcls == FP_INFINITE)
    {
      /* Real part is infinite.  */
      if (icls == FP_ZERO)
       {
         /* Imaginary part is 0.0.  */
         __real__ retval = HUGE_VALL;
         __imag__ retval = __imag__ x * __copysignl (1.0, __real__ x);
       }
      else if (icls > FP_ZERO)
       {
         /* Imaginary part is finite.  */
         long double sinix, cosix;

         __sincosl (__imag__ x, &sinix, &cosix);

         __real__ retval = __copysignl (HUGE_VALL, cosix);
         __imag__ retval = (__copysignl (HUGE_VALL, sinix)
                          * __copysignl (1.0, __real__ x));
       }
      else
       {
         /* The addition raises the invalid exception.  */
         __real__ retval = HUGE_VALL;
         __imag__ retval = __nanl ("") + __nanl ("");

#ifdef FE_INVALID
         if (icls == FP_INFINITE)
           feraiseexcept (FE_INVALID);
#endif
       }
    }
  else
    {
      __real__ retval = __nanl ("");
      __imag__ retval = __imag__ x == 0.0 ? __imag__ x : __nanl ("");
    }

  return retval;
}

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