| /* |
| This Software is provided under the Zope Public License (ZPL) Version 2.1. |
| |
| Copyright (c) 2009, 2010 by the mingw-w64 project |
| |
| See the AUTHORS file for the list of contributors to the mingw-w64 project. |
| |
| This license has been certified as open source. It has also been designated |
| as GPL compatible by the Free Software Foundation (FSF). |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions are met: |
| |
| 1. Redistributions in source code must retain the accompanying copyright |
| notice, this list of conditions, and the following disclaimer. |
| 2. Redistributions in binary form must reproduce the accompanying |
| copyright notice, this list of conditions, and the following disclaimer |
| in the documentation and/or other materials provided with the |
| distribution. |
| 3. Names of the copyright holders must not be used to endorse or promote |
| products derived from this software without prior written permission |
| from the copyright holders. |
| 4. The right to distribute this software or to use it for any purpose does |
| not give you the right to use Servicemarks (sm) or Trademarks (tm) of |
| the copyright holders. Use of them is covered by separate agreement |
| with the copyright holders. |
| 5. If any files are modified, you must cause the modified files to carry |
| prominent notices stating that you changed the files and the date of |
| any change. |
| |
| Disclaimer |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY EXPRESSED |
| OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
| EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, |
| OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
| EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| __FLT_TYPE __complex__ __cdecl |
| __FLT_ABI(ctanh) (__FLT_TYPE __complex__ z) |
| { |
| __complex__ __FLT_TYPE ret; |
| __FLT_TYPE s, c, d; |
| |
| if (!isfinite (__real__ z) || !isfinite (__imag__ z)) |
| { |
| if (isinf (__real__ z)) |
| { |
| __real__ ret = __FLT_ABI(copysign) (__FLT_CST(1.0), __real__ z); |
| |
| /* fmod will return NaN if __imag__ z is infinity. This is actually |
| OK, because imaginary infinity returns a + or - zero (unspecified). |
| For +x, sin (x) is negative if fmod (x, 2pi) > pi. |
| For -x, sin (x) is positive if fmod (x, 2pi) < pi. |
| We use epsilon to ensure that the zeros are detected properly with |
| float and long double comparisons. */ |
| s = __FLT_ABI(fmod) (__imag__ z, __FLT_PI); |
| if (signbit (__imag__ z)) |
| __imag__ ret = s + __FLT_PI_2 < -__FLT_EPSILON ? 0.0 : -0.0; |
| else |
| __imag__ ret = s - __FLT_PI_2 > __FLT_EPSILON ? -0.0 : 0.0; |
| return ret; |
| } |
| |
| if (__imag__ z == __FLT_CST(0.0)) |
| return z; |
| |
| __real__ ret = __FLT_NAN; |
| __imag__ ret = __FLT_NAN; |
| return ret; |
| } |
| |
| __FLT_ABI(sincos) (__FLT_CST(2.0) * __imag__ z, &s, &c); |
| |
| d = (__FLT_ABI(cosh) (__FLT_CST(2.0) * __real__ z) + c); |
| |
| if (d == __FLT_CST(0.0)) |
| { |
| __complex__ __FLT_TYPE ez = __FLT_ABI(cexp) (z); |
| __complex__ __FLT_TYPE emz = __FLT_ABI(cexp) (-z); |
| |
| return (ez - emz) / (ez + emz); |
| } |
| |
| __real__ ret = __FLT_ABI(sinh) (__FLT_CST(2.0) * __real__ z) / d; |
| __imag__ ret = s / d; |
| return ret; |
| } |