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* libc/locale/locale.c: Use double quotes in code. * libc/locale/locale.tex: Likewise. * libc/libc.texinfo: Hyphenate "floating-point". * libc/machine/necv70/necv70.tex: Likewise. * libc/stdio/sprintf.c: Likewise. * libc/stdio/sscanf.c: Likewise. * libc/stdlib/atof.c: Likewise. * libc/stdlib/ldtoa.c: Fix comment typo. * libc/stdlib/div.c: Use @ifnottex instead of @ifinfo. * libc/stdlib/ldiv.c: Likewise. * libm/common/s_expm1.c: Likewise. * libm/common/s_ilogb.c: Hyphenate "floating-point". Use "nonzero". * libm/common/s_infinity: Hyphenate "double- and single-precision". * libm/common/s_nan.c: Likewise. Also correct the FUNCTION summary. * libm/common/s_nextafter.c: Fix typo. Hyphenate "double-precision" and "floating-point". * libm/common/s_scalbn.c: Correct the FUNCTION summary. * libm/math/e_pow.c: Fix comment typo. * libm/math/math.tex: Hyphenate "single-precision" and "floating-point". * libm/math/s_asinh.c: Use @ifnottex instead of @ifinfo. * libm/math/s_atan.c: Likewise. * libm/math/s_frexp.c: Likewise. Also use "nonzero". * libm/math/s_isnan.c: Hyphenate "single-precision" and "floating-point". Use "nonzero". * libm/math/s_ldexp.c: Use @ifnottex instead of @ifinfo. * libm/math/w_acos.c: Likewise. * libm/math/w_acosh.c: Likewise. * libm/math/w_asin.c: Likewise. * libm/math/w_atan2.c: Likewise. * libm/math/w_atanh.c: Likewise. * libm/math/w_cosh.c: Likewise. * libm/math/w_exp.c: Likewise. * libm/math/w_exp2.c: Likewise. Add missing @end and missing @tex version of 2^x in the description. * libm/math/w_fmod.c: Use @ifnottex instead of @ifinfo. * libm/math/w_gamma.c: Likewise. * libm/math/w_hypot.c: Likewise. * libm/math/w_j0.c: Likewise. * libm/math/w_sinh.c: Likewise. * libm/math/w_pow.c: Replace "exp1.0nt" with "exponent". * libm/mathfp/mathfp.tex: Hyphenate "single-precision" and "floating-point". * libm/mathfp/e_acosh.c: Use @ifnottex instead of @ifinfo. * libm/mathfp/e_atanh.c: Likewise. * libm/mathfp/e_hypot.c: Likewise. * libm/mathfp/er_lgamma.c: Likewise. * libm/mathfp/s_acos.c: Likewise. * libm/mathfp/s_asine.c: Likewise. * libm/mathfp/s_asinh.c: Likewise. * libm/mathfp/s_atan.c: Likewise. * libm/mathfp/s_atan2.c: Likewise. * libm/mathfp/s_atangent.c: Likewise. * libm/mathfp/s_cosh.c: Likewise. * libm/mathfp/s_exp.c: Likewise. * libm/mathfp/s_fmod.c: Likewise. * libm/mathfp/s_frexp.c: Likewise. Also use "nonzero". * libm/mathfp/s_isnan.c: Hyphenate "single-precision" and "floating-point". Use "nonzero". * libm/math/s_pow.c: Replace "exp1.0nt" with "exponent". * libm/mathfp/s_ldexp.c: Use @ifnottex instead of @ifinfo. * libm/mathfp/s_sineh.c: Likewise. * libm/mathfp/w_jn.c: Likewise.
123 lines
2.5 KiB
C
123 lines
2.5 KiB
C
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/* @(#)w_acosh.c 5.1 93/09/24 */
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*
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*/
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/*
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FUNCTION
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<<acosh>>, <<acoshf>>---inverse hyperbolic cosine
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INDEX
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acosh
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INDEX
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acoshf
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ANSI_SYNOPSIS
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#include <math.h>
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double acosh(double <[x]>);
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float acoshf(float <[x]>);
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TRAD_SYNOPSIS
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#include <math.h>
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double acosh(<[x]>)
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double <[x]>;
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float acoshf(<[x]>)
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float <[x]>;
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DESCRIPTION
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<<acosh>> calculates the inverse hyperbolic cosine of <[x]>.
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<<acosh>> is defined as
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@ifnottex
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. log(<[x]> + sqrt(<[x]>*<[x]>-1))
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@end ifnottex
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@tex
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$$ln\Bigl(x + \sqrt{x^2-1}\Bigr)$$
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@end tex
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<[x]> must be a number greater than or equal to 1.
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<<acoshf>> is identical, other than taking and returning floats.
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RETURNS
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<<acosh>> and <<acoshf>> return the calculated value. If <[x]>
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less than 1, the return value is NaN and <<errno>> is set to <<EDOM>>.
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You can change the error-handling behavior with the non-ANSI
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<<matherr>> function.
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PORTABILITY
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Neither <<acosh>> nor <<acoshf>> are ANSI C. They are not recommended
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for portable programs.
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QUICKREF ANSI SVID POSIX RENTRANT
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acos n,n,n,m
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acosf n,n,n,m
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MATHREF
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acosh, NAN, arg,DOMAIN,EDOM
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acosh, < 1.0, NAN,DOMAIN,EDOM
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acosh, >=1.0, acosh(arg),,,
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MATHREF
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acoshf, NAN, arg,DOMAIN,EDOM
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acoshf, < 1.0, NAN,DOMAIN,EDOM
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acoshf, >=1.0, acosh(arg),,,
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*/
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/*
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* wrapper acosh(x)
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*/
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#include "fdlibm.h"
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#include <errno.h>
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#ifndef _DOUBLE_IS_32BITS
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#ifdef __STDC__
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double acosh(double x) /* wrapper acosh */
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#else
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double acosh(x) /* wrapper acosh */
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double x;
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#endif
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{
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#ifdef _IEEE_LIBM
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return __ieee754_acosh(x);
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#else
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double z;
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struct exception exc;
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z = __ieee754_acosh(x);
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if(_LIB_VERSION == _IEEE_ || isnan(x)) return z;
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if(x<1.0) {
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/* acosh(x<1) */
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exc.type = DOMAIN;
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exc.name = "acosh";
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exc.err = 0;
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exc.arg1 = exc.arg2 = x;
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exc.retval = 0.0/0.0;
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if (_LIB_VERSION == _POSIX_)
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errno = EDOM;
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else if (!matherr(&exc)) {
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errno = EDOM;
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}
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if (exc.err != 0)
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errno = exc.err;
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return exc.retval;
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} else
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return z;
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#endif
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}
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#endif /* defined(_DOUBLE_IS_32BITS) */
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