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b4012b7542
1997-04-21 13:25 Ulrich Drepper <drepper@cygnus.com>
* manual/arith.texi: Add description for INFINITY, _Imaginary_I,
fpclassify & friends, and complex number operations.
Update various other math functions for ISO C 9X.
* manual/math.texi: Update various entries for ISO C 9X.
Add description for complex number functions.
Add description of rand48 function family.
* manual/string.h: Add description of a64l and l64a.
* math/cmathcalls.h: Fix typo.
* stdlib/a64l.c: Pretty printing.
* stdlib/seed48_r.c: Also reset `a' and `c' to default values.
* stdlib/srand48_r.c: Likewise.
* stdlib/stdlib.h: Pretty printing.
* sysdeps/i386/fpu/__math.h: Fix typo.
* sysdeps/libm-ieee754/s_nearbyintf.c: Correctly name function.
* sysdeps/libm-ieee754/s_nearbyintl.c: Likewise.
1997-04-19 22:16 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* sysdeps/m68k/fpu/e_pow.c: Rewrite handling of integral exponent.
1997-04-18 19:34 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* sysdeps/m68k/fpu/__math.h: Define optimized versions of
isgreater, isgreaterequal, isless, islessequal, islessgreater, and
isunordered.
1997-04-20 01:28 Richard Henderson <rth@tamu.edu>
* rellns-sh: Handle files in the same directory correctly.
1997-04-20 11:22 Ulrich Drepper <drepper@cygnus.com>
* csu/initfini.c: Place ALIGN instruction at correct positions.
Patch by Richard Henderson <richard@twiddle.rth.home>.
1997-04-19 17:12 Ulrich Drepper <drepper@cygnus.com>
* Make-dist: Don't automatically ignore .c files if the .S or .s file
is ignored.
* csu/Makefile (distribute): Add defs.awk.
1997-04-19 15:39 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/stub/shmat.c: Update to XPG4.2 interface.
* sysdeps/stub/shmdt.c: Likewise.
Reported by Thomas Bushnell, n/BSG.
1997-04-19 13:22 Ulrich Drepper <drepper@cygnus.com>
* manual/stdio.texi: Add description of printf_size and
printf_size_info. Partly based on the documentation by Larry McVoy.
1997-04-19 02:21 Ulrich Drepper <drepper@cygnus.com>
* stdio-common/printf_size.c (printf_size): Correct values for
`units'.
Report by Larry McVoy <lm@neteng.engr.sgi.com>.
* stdio-common/tst-printfsz.c: New file.
* stdio-common/Makefile (tests): Add tst-printfsz.c.
(CFLAGS-tst-printfsz.c): Define to prevent warnings about format
strings.
1997-04-18 15:48 Ulrich Drepper <drepper@cygnus.com>
* login/utmp.h: Add prototype for updwtmp.
* login/logwtmp.c: Add new function updwtmp which allows to write
a complete record to the wtmp file.
Patch by Miquel van Smoorenburg <miquels@cistron.nl>.
1997-04-17 17:57 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* math/Makefile (headers): Add mathbits.h.
1997-04-16 21:20 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* sysdeps/m68k/fpu/__math.h: Add inlined sincos{,l,f}.
* sysdeps/m68k/fpu/s_sincos.c: New file.
* sysdeps/m68k/fpu/s_sincosf.c: New file.
* sysdeps/m68k/fpu/s_sincosl.c: New file.
* sysdeps/libm-ieee754/e_scalb.c: Use internal names of the
functions.
* sysdeps/libm-ieee754/e_scalbl.c: Likewise.
* sysdeps/libm-ieee754/s_ctanh.c: Use isfinite instead of finite.
* sysdeps/libm-ieee754/s_ctanhf.c: Likewise.
* sysdeps/libm-ieee754/s_ctanhl.c: Likewise.
* sysdeps/libm-ieee754/s_ctan.c: Likewise.
* sysdeps/libm-ieee754/s_ctanf.c: Likewise.
* sysdeps/libm-ieee754/s_ctanl.c: Likewise. Fix type of `res'.
1997-04-18 11:21 Ulrich Drepper <drepper@cygnus.com>
* shadow/fgetspent_r.c: Set *RESULT to NULL before returning error.
Patch by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>.
69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
/* Complex tangent function for double.
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Copyright (C) 1997 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__ double
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__ctan (__complex__ double x)
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{
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__complex__ double res;
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if (!isfinite (__real__ x) || !isfinite (__imag__ x))
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{
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if (__isinf (__imag__ x))
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{
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__real__ res = __copysign (0.0, __real__ x);
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__imag__ res = __copysign (1.0, __imag__ x);
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}
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else if (__real__ x == 0.0)
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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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__real__ res = __nan ("");
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__imag__ res = __nan ("");
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}
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}
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else
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{
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double sin2rx, cos2rx;
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double den;
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__sincos (2.0 * __real__ x, &sin2rx, &cos2rx);
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den = cos2rx + __ieee754_cosh (2.0 * __imag__ x);
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__real__ res = sin2rx / den;
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__imag__ res = __ieee754_sinh (2.0 * __imag__ x) / den;
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}
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return res;
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}
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weak_alias (__ctan, ctan)
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#ifdef NO_LONG_DOUBLE
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strong_alias (__ctan, __ctanl)
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weak_alias (__ctan, ctanl)
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#endif
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