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1998-02-17 15:10 Ulrich Drepper <drepper@cygnus.com> * elf/dl-load.c (open_path): Use __xstat instead of stat. * localedata/tst-locale.sh: Comment out first test for now. 1998-02-14 14:58 H.J. Lu <hjl@gnu.org> * sysdeps/generic/_G_config.h (_G_HAVE_IO_GETLINE_INFO): Defined as 1. * sysdeps/unix/sysv/linux/_G_config.h (_G_HAVE_IO_GETLINE_INFO): Likewise. * libio/iogetline.c (_IO_getline_info): Renamed from _IO_getline. (_IO_getline): Just call _IO_getline_info. * libio/libioP.h (_IO_getline_info): New declaration. * libc.map (_IO_getline_info, __write): Added. 1998-02-17 Andreas Jaeger <aj@arthur.rhein-neckar.de> * sunrpc/rpc_cout.c (inline_struct): Change typo of plus to const char* to shut up gcc. 1998-02-17 11:37 Ulrich Drepper <drepper@cygnus.com> * eld/dl-open.c (_dl_open): Assign correct value to new->l_global. Patch forwarded by Cristian Gafton <gafton@redhat.com>. * math/math.h: Define M_* constants always as `double' and add new macros M_*l which are of type `long double'. * sysdeps/libm-ieee754/s_cacoshl.c: Use M_*l constants now. * sysdeps/libm-ieee754/s_cacosl.c: Likewise. * sysdeps/libm-ieee754/s_casinhl.c: Likewise. * sysdeps/libm-ieee754/s_catanhl.c: Likewise. * sysdeps/libm-ieee754/s_catanl.c: Likewise. * sysdeps/libm-ieee754/s_clog10l.c: Likewise. * sysdeps/libm-ieee754/s_clogl.c: Likewise. * math/libm-tst.c: Likewise. * sysdeps/i386/fpu/bits/mathinline.h (__M_SQRT2): Don't use _Mdbl, define as long double unconditionally. 1998-02-17 Andreas Jaeger <aj@arthur.rhein-neckar.de> * manual/arith.texi (Old-style number conversion): Correct some typos. 1998-02-16 16:28 H.J. Lu <hjl@gnu.org> * time/Makefile (tz-cflags, CFLAGS-tzfile.c, CFLAGS-tzset.c): Restore. * timezone/Makefile (CFLAGS-tzfile.c, CFLAGS-tzset.c): Deleted.
86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
/* Return arc tangent of complex long double value.
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Copyright (C) 1997, 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <complex.h>
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#include <math.h>
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#include "math_private.h"
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__complex__ long double
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__catanl (__complex__ long double x)
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{
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__complex__ long double res;
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int rcls = fpclassify (__real__ x);
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int icls = fpclassify (__imag__ x);
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if (rcls <= FP_INFINITE || icls <= FP_INFINITE)
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{
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if (rcls == FP_INFINITE)
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{
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__real__ res = __copysignl (M_PI_2l, __real__ x);
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__imag__ res = __copysignl (0.0, __imag__ x);
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}
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else if (icls == FP_INFINITE)
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{
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if (rcls >= FP_ZERO)
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__real__ res = __copysignl (M_PI_2l, __real__ x);
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else
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__real__ res = __nanl ("");
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__imag__ res = __copysignl (0.0, __imag__ x);
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}
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else if (icls == FP_ZERO || icls == FP_INFINITE)
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{
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__real__ res = __nanl ("");
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__imag__ res = __copysignl (0.0, __imag__ x);
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}
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else
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{
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__real__ res = __nanl ("");
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__imag__ res = __nanl ("");
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}
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}
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else if (rcls == FP_ZERO && icls == FP_ZERO)
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{
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res = x;
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}
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else
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{
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long double r2, num, den;
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r2 = __real__ x * __real__ x;
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den = 1 - r2 - __imag__ x * __imag__ x;
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__real__ res = 0.5 * __ieee754_atan2l (2.0 * __real__ x, den);
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num = __imag__ x + 1.0;
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num = r2 + num * num;
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den = __imag__ x - 1.0;
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den = r2 + den * den;
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__imag__ res = 0.25 * __ieee754_logl (num / den);
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}
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return res;
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}
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weak_alias (__catanl, catanl)
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