0,0 → 1,784 |
|
/* @(#)k_standard.c 5.1 93/09/24 */ |
/* |
* ==================================================== |
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
* |
* Developed at SunPro, a Sun Microsystems, Inc. business. |
* Permission to use, copy, modify, and distribute this |
* software is freely granted, provided that this notice |
* is preserved. |
* ==================================================== |
* |
*/ |
|
#include "fdlibm.h" |
#include <errno.h> |
|
#ifndef _USE_WRITE |
#include <stdio.h> /* fputs(), stderr */ |
#define WRITE2(u,v) fputs(u, stderr) |
#else /* !defined(_USE_WRITE) */ |
#include <unistd.h> /* write */ |
#define WRITE2(u,v) write(2, u, v) |
#undef fflush |
#endif /* !defined(_USE_WRITE) */ |
|
#ifdef __STDC__ |
static const double zero = 0.0; /* used as const */ |
#else |
static double zero = 0.0; /* used as const */ |
#endif |
|
/* |
* Standard conformance (non-IEEE) on exception cases. |
* Mapping: |
* 1 -- acos(|x|>1) |
* 2 -- asin(|x|>1) |
* 3 -- atan2(+-0,+-0) |
* 4 -- hypot overflow |
* 5 -- cosh overflow |
* 6 -- exp overflow |
* 7 -- exp underflow |
* 8 -- y0(0) |
* 9 -- y0(-ve) |
* 10-- y1(0) |
* 11-- y1(-ve) |
* 12-- yn(0) |
* 13-- yn(-ve) |
* 14-- lgamma(finite) overflow |
* 15-- lgamma(-integer) |
* 16-- log(0) |
* 17-- log(x<0) |
* 18-- log10(0) |
* 19-- log10(x<0) |
* 20-- pow(0.0,0.0) |
* 21-- pow(x,y) overflow |
* 22-- pow(x,y) underflow |
* 23-- pow(0,negative) |
* 24-- pow(neg,non-integral) |
* 25-- sinh(finite) overflow |
* 26-- sqrt(negative) |
* 27-- fmod(x,0) |
* 28-- remainder(x,0) |
* 29-- acosh(x<1) |
* 30-- atanh(|x|>1) |
* 31-- atanh(|x|=1) |
* 32-- scalb overflow |
* 33-- scalb underflow |
* 34-- j0(|x|>X_TLOSS) |
* 35-- y0(x>X_TLOSS) |
* 36-- j1(|x|>X_TLOSS) |
* 37-- y1(x>X_TLOSS) |
* 38-- jn(|x|>X_TLOSS, n) |
* 39-- yn(x>X_TLOSS, n) |
* 40-- gamma(finite) overflow |
* 41-- gamma(-integer) |
* 42-- pow(NaN,0.0) |
*/ |
|
|
#ifdef __STDC__ |
double __kernel_standard(double x, double y, int type) |
#else |
double __kernel_standard(x,y,type) |
double x,y; int type; |
#endif |
{ |
struct exception exc; |
#ifndef HUGE_VAL /* this is the only routine that uses HUGE_VAL */ |
#define HUGE_VAL inf |
double inf = 0.0; |
|
SET_HIGH_WORD(inf,0x7ff00000); /* set inf to infinite */ |
#endif |
|
#ifdef _USE_WRITE |
/* (void) fflush(_stdout_r(p)); */ |
#endif |
exc.arg1 = x; |
exc.arg2 = y; |
exc.err = 0; |
switch(type) { |
case 1: |
case 101: |
/* acos(|x|>1) */ |
exc.type = DOMAIN; |
exc.name = type < 100 ? "acos" : "acosf"; |
exc.retval = zero; |
if (_LIB_VERSION == _POSIX_) |
errno = EDOM; |
else if (!matherr(&exc)) { |
/* if(_LIB_VERSION == _SVID_) { |
(void) WRITE2("acos: DOMAIN error\n", 19); |
} */ |
errno = EDOM; |
} |
break; |
case 2: |
case 102: |
/* asin(|x|>1) */ |
exc.type = DOMAIN; |
exc.name = type < 100 ? "asin" : "asinf"; |
exc.retval = zero; |
if(_LIB_VERSION == _POSIX_) |
errno = EDOM; |
else if (!matherr(&exc)) { |
/* if(_LIB_VERSION == _SVID_) { |
(void) WRITE2("asin: DOMAIN error\n", 19); |
} */ |
errno = EDOM; |
} |
break; |
case 3: |
case 103: |
/* atan2(+-0,+-0) */ |
exc.arg1 = y; |
exc.arg2 = x; |
exc.type = DOMAIN; |
exc.name = type < 100 ? "atan2" : "atan2f"; |
exc.retval = zero; |
if(_LIB_VERSION == _POSIX_) |
errno = EDOM; |
else if (!matherr(&exc)) { |
/* if(_LIB_VERSION == _SVID_) { |
(void) WRITE2("atan2: DOMAIN error\n", 20); |
} */ |
errno = EDOM; |
} |
break; |
case 4: |
case 104: |
/* hypot(finite,finite) overflow */ |
exc.type = OVERFLOW; |
exc.name = type < 100 ? "hypot" : "hypotf"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = HUGE; |
else |
exc.retval = HUGE_VAL; |
if (_LIB_VERSION == _POSIX_) |
errno = ERANGE; |
else if (!matherr(&exc)) { |
errno = ERANGE; |
} |
break; |
case 5: |
case 105: |
/* cosh(finite) overflow */ |
exc.type = OVERFLOW; |
exc.name = type < 100 ? "cosh" : "coshf"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = HUGE; |
else |
exc.retval = HUGE_VAL; |
if (_LIB_VERSION == _POSIX_) |
errno = ERANGE; |
else if (!matherr(&exc)) { |
errno = ERANGE; |
} |
break; |
case 6: |
case 106: |
/* exp(finite) overflow */ |
exc.type = OVERFLOW; |
exc.name = type < 100 ? "exp" : "expf"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = HUGE; |
else |
exc.retval = HUGE_VAL; |
if (_LIB_VERSION == _POSIX_) |
errno = ERANGE; |
else if (!matherr(&exc)) { |
errno = ERANGE; |
} |
break; |
case 7: |
case 107: |
/* exp(finite) underflow */ |
exc.type = UNDERFLOW; |
exc.name = type < 100 ? "exp" : "expf"; |
exc.retval = zero; |
if (_LIB_VERSION == _POSIX_) |
errno = ERANGE; |
else if (!matherr(&exc)) { |
errno = ERANGE; |
} |
break; |
case 8: |
case 108: |
/* y0(0) = -inf */ |
exc.type = DOMAIN; /* should be SING for IEEE */ |
exc.name = type < 100 ? "y0" : "y0f"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = -HUGE; |
else |
exc.retval = -HUGE_VAL; |
if (_LIB_VERSION == _POSIX_) |
errno = EDOM; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2("y0: DOMAIN error\n", 17); |
} */ |
errno = EDOM; |
} |
break; |
case 9: |
case 109: |
/* y0(x<0) = NaN */ |
exc.type = DOMAIN; |
exc.name = type < 100 ? "y0" : "y0f"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = -HUGE; |
else |
exc.retval = -HUGE_VAL; |
if (_LIB_VERSION == _POSIX_) |
errno = EDOM; |
else if (!matherr(&exc)) { |
/*if (_LIB_VERSION == _SVID_) { |
(void) WRITE2("y0: DOMAIN error\n", 17); |
} */ |
errno = EDOM; |
} |
break; |
case 10: |
case 110: |
/* y1(0) = -inf */ |
exc.type = DOMAIN; /* should be SING for IEEE */ |
exc.name = type < 100 ? "y1" : "y1f"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = -HUGE; |
else |
exc.retval = -HUGE_VAL; |
if (_LIB_VERSION == _POSIX_) |
errno = EDOM; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2("y1: DOMAIN error\n", 17); |
} */ |
errno = EDOM; |
} |
break; |
case 11: |
case 111: |
/* y1(x<0) = NaN */ |
exc.type = DOMAIN; |
exc.name = type < 100 ? "y1" : "y1f"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = -HUGE; |
else |
exc.retval = -HUGE_VAL; |
if (_LIB_VERSION == _POSIX_) |
errno = EDOM; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2("y1: DOMAIN error\n", 17); |
} */ |
errno = EDOM; |
} |
break; |
case 12: |
case 112: |
/* yn(n,0) = -inf */ |
exc.type = DOMAIN; /* should be SING for IEEE */ |
exc.name = type < 100 ? "yn" : "ynf"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = -HUGE; |
else |
exc.retval = -HUGE_VAL; |
if (_LIB_VERSION == _POSIX_) |
errno = EDOM; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2("yn: DOMAIN error\n", 17); |
} */ |
errno = EDOM; |
} |
break; |
case 13: |
case 113: |
/* yn(x<0) = NaN */ |
exc.type = DOMAIN; |
exc.name = type < 100 ? "yn" : "ynf"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = -HUGE; |
else |
exc.retval = -HUGE_VAL; |
if (_LIB_VERSION == _POSIX_) |
errno = EDOM; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2("yn: DOMAIN error\n", 17); |
} */ |
errno = EDOM; |
} |
break; |
case 14: |
case 114: |
/* lgamma(finite) overflow */ |
exc.type = OVERFLOW; |
exc.name = type < 100 ? "lgamma" : "lgammaf"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = HUGE; |
else |
exc.retval = HUGE_VAL; |
if (_LIB_VERSION == _POSIX_) |
errno = ERANGE; |
else if (!matherr(&exc)) { |
errno = ERANGE; |
} |
break; |
case 15: |
case 115: |
/* lgamma(-integer) or lgamma(0) */ |
exc.type = SING; |
exc.name = type < 100 ? "lgamma" : "lgammaf"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = HUGE; |
else |
exc.retval = HUGE_VAL; |
if (_LIB_VERSION == _POSIX_) |
errno = EDOM; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2("lgamma: SING error\n", 19); |
} */ |
errno = EDOM; |
} |
break; |
case 16: |
case 116: |
/* log(0) */ |
exc.type = SING; |
exc.name = type < 100 ? "log" : "logf"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = -HUGE; |
else |
exc.retval = -HUGE_VAL; |
if (_LIB_VERSION == _POSIX_) |
errno = ERANGE; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2("log: SING error\n", 16); |
} */ |
errno = EDOM; |
} |
break; |
case 17: |
case 117: |
/* log(x<0) */ |
exc.type = DOMAIN; |
exc.name = type < 100 ? "log" : "logf"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = -HUGE; |
else |
exc.retval = -HUGE_VAL; |
if (_LIB_VERSION == _POSIX_) |
errno = EDOM; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2("log: DOMAIN error\n", 18); |
} */ |
errno = EDOM; |
} |
break; |
case 18: |
case 118: |
/* log10(0) */ |
exc.type = SING; |
exc.name = type < 100 ? "log10" : "log10f"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = -HUGE; |
else |
exc.retval = -HUGE_VAL; |
if (_LIB_VERSION == _POSIX_) |
errno = ERANGE; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2("log10: SING error\n", 18); |
} */ |
errno = EDOM; |
} |
break; |
case 19: |
case 119: |
/* log10(x<0) */ |
exc.type = DOMAIN; |
exc.name = type < 100 ? "log10" : "log10f"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = -HUGE; |
else |
exc.retval = -HUGE_VAL; |
if (_LIB_VERSION == _POSIX_) |
errno = EDOM; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2("log10: DOMAIN error\n", 20); |
} */ |
errno = EDOM; |
} |
break; |
case 20: |
case 120: |
/* pow(0.0,0.0) */ |
/* error only if _LIB_VERSION == _SVID_ */ |
exc.type = DOMAIN; |
exc.name = type < 100 ? "pow" : "powf"; |
exc.retval = zero; |
if (_LIB_VERSION != _SVID_) exc.retval = 1.0; |
else if (!matherr(&exc)) { |
/* (void) WRITE2("pow(0,0): DOMAIN error\n", 23); */ |
errno = EDOM; |
} |
break; |
case 21: |
case 121: |
/* pow(x,y) overflow */ |
exc.type = OVERFLOW; |
exc.name = type < 100 ? "pow" : "powf"; |
if (_LIB_VERSION == _SVID_) { |
exc.retval = HUGE; |
y *= 0.5; |
if(x<zero&&rint(y)!=y) exc.retval = -HUGE; |
} else { |
exc.retval = HUGE_VAL; |
y *= 0.5; |
if(x<zero&&rint(y)!=y) exc.retval = -HUGE_VAL; |
} |
if (_LIB_VERSION == _POSIX_) |
errno = ERANGE; |
else if (!matherr(&exc)) { |
errno = ERANGE; |
} |
break; |
case 22: |
case 122: |
/* pow(x,y) underflow */ |
exc.type = UNDERFLOW; |
exc.name = type < 100 ? "pow" : "powf"; |
exc.retval = zero; |
if (_LIB_VERSION == _POSIX_) |
errno = ERANGE; |
else if (!matherr(&exc)) { |
errno = ERANGE; |
} |
break; |
case 23: |
case 123: |
/* 0**neg */ |
exc.type = DOMAIN; |
exc.name = type < 100 ? "pow" : "powf"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = zero; |
else |
exc.retval = -HUGE_VAL; |
if (_LIB_VERSION == _POSIX_) |
errno = EDOM; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2("pow(0,neg): DOMAIN error\n", 25); |
} */ |
errno = EDOM; |
} |
break; |
case 24: |
case 124: |
/* neg**non-integral */ |
exc.type = DOMAIN; |
exc.name = type < 100 ? "pow" : "powf"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = zero; |
else |
exc.retval = zero/zero; /* X/Open allow NaN */ |
if (_LIB_VERSION == _POSIX_) |
errno = EDOM; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2("neg**non-integral: DOMAIN error\n", 32); |
} */ |
errno = EDOM; |
} |
break; |
case 25: |
case 125: |
/* sinh(finite) overflow */ |
exc.type = OVERFLOW; |
exc.name = type < 100 ? "sinh" : "sinhf"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = ( (x>zero) ? HUGE : -HUGE); |
else |
exc.retval = ( (x>zero) ? HUGE_VAL : -HUGE_VAL); |
if (_LIB_VERSION == _POSIX_) |
errno = ERANGE; |
else if (!matherr(&exc)) { |
errno = ERANGE; |
} |
break; |
case 26: |
case 126: |
/* sqrt(x<0) */ |
exc.type = DOMAIN; |
exc.name = type < 100 ? "sqrt" : "sqrtf"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = zero; |
else |
exc.retval = zero/zero; |
if (_LIB_VERSION == _POSIX_) |
errno = EDOM; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2("sqrt: DOMAIN error\n", 19); |
} */ |
errno = EDOM; |
} |
break; |
case 27: |
case 127: |
/* fmod(x,0) */ |
exc.type = DOMAIN; |
exc.name = type < 100 ? "fmod" : "fmodf"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = x; |
else |
exc.retval = zero/zero; |
if (_LIB_VERSION == _POSIX_) |
errno = EDOM; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2("fmod: DOMAIN error\n", 20); |
} */ |
errno = EDOM; |
} |
break; |
case 28: |
case 128: |
/* remainder(x,0) */ |
exc.type = DOMAIN; |
exc.name = type < 100 ? "remainder" : "remainderf"; |
exc.retval = zero/zero; |
if (_LIB_VERSION == _POSIX_) |
errno = EDOM; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2("remainder: DOMAIN error\n", 24); |
} */ |
errno = EDOM; |
} |
break; |
case 29: |
case 129: |
/* acosh(x<1) */ |
exc.type = DOMAIN; |
exc.name = type < 100 ? "acosh" : "acoshf"; |
exc.retval = zero/zero; |
if (_LIB_VERSION == _POSIX_) |
errno = EDOM; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2("acosh: DOMAIN error\n", 20); |
} */ |
errno = EDOM; |
} |
break; |
case 30: |
case 130: |
/* atanh(|x|>1) */ |
exc.type = DOMAIN; |
exc.name = type < 100 ? "atanh" : "atanhf"; |
exc.retval = zero/zero; |
if (_LIB_VERSION == _POSIX_) |
errno = EDOM; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2("atanh: DOMAIN error\n", 20); |
} */ |
errno = EDOM; |
} |
break; |
case 31: |
case 131: |
/* atanh(|x|=1) */ |
exc.type = SING; |
exc.name = type < 100 ? "atanh" : "atanhf"; |
exc.retval = x/zero; /* sign(x)*inf */ |
if (_LIB_VERSION == _POSIX_) |
errno = EDOM; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2("atanh: SING error\n", 18); |
} */ |
errno = EDOM; |
} |
break; |
case 32: |
case 132: |
/* scalb overflow; SVID also returns +-HUGE_VAL */ |
exc.type = OVERFLOW; |
exc.name = type < 100 ? "scalb" : "scalbf"; |
exc.retval = x > zero ? HUGE_VAL : -HUGE_VAL; |
if (_LIB_VERSION == _POSIX_) |
errno = ERANGE; |
else if (!matherr(&exc)) { |
errno = ERANGE; |
} |
break; |
case 33: |
case 133: |
/* scalb underflow */ |
exc.type = UNDERFLOW; |
exc.name = type < 100 ? "scalb" : "scalbf"; |
exc.retval = copysign(zero,x); |
if (_LIB_VERSION == _POSIX_) |
errno = ERANGE; |
else if (!matherr(&exc)) { |
errno = ERANGE; |
} |
break; |
case 34: |
case 134: |
/* j0(|x|>X_TLOSS) */ |
exc.type = TLOSS; |
exc.name = type < 100 ? "j0" : "j0f"; |
exc.retval = zero; |
if (_LIB_VERSION == _POSIX_) |
errno = ERANGE; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2(exc.name, 2); |
(void) WRITE2(": TLOSS error\n", 14); |
} */ |
errno = ERANGE; |
} |
break; |
case 35: |
case 135: |
/* y0(x>X_TLOSS) */ |
exc.type = TLOSS; |
exc.name = type < 100 ? "y0" : "y0f"; |
exc.retval = zero; |
if (_LIB_VERSION == _POSIX_) |
errno = ERANGE; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2(exc.name, 2); |
(void) WRITE2(": TLOSS error\n", 14); |
} */ |
errno = ERANGE; |
} |
break; |
case 36: |
case 136: |
/* j1(|x|>X_TLOSS) */ |
exc.type = TLOSS; |
exc.name = type < 100 ? "j1" : "j1f"; |
exc.retval = zero; |
if (_LIB_VERSION == _POSIX_) |
errno = ERANGE; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2(exc.name, 2); |
(void) WRITE2(": TLOSS error\n", 14); |
} */ |
errno = ERANGE; |
} |
break; |
case 37: |
case 137: |
/* y1(x>X_TLOSS) */ |
exc.type = TLOSS; |
exc.name = type < 100 ? "y1" : "y1f"; |
exc.retval = zero; |
if (_LIB_VERSION == _POSIX_) |
errno = ERANGE; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2(exc.name, 2); |
(void) WRITE2(": TLOSS error\n", 14); |
} */ |
errno = ERANGE; |
} |
break; |
case 38: |
case 138: |
/* jn(|x|>X_TLOSS) */ |
exc.type = TLOSS; |
exc.name = type < 100 ? "jn" : "jnf"; |
exc.retval = zero; |
if (_LIB_VERSION == _POSIX_) |
errno = ERANGE; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2(exc.name, 2); |
(void) WRITE2(": TLOSS error\n", 14); |
} */ |
errno = ERANGE; |
} |
break; |
case 39: |
case 139: |
/* yn(x>X_TLOSS) */ |
exc.type = TLOSS; |
exc.name = type < 100 ? "yn" : "ynf"; |
exc.retval = zero; |
if (_LIB_VERSION == _POSIX_) |
errno = ERANGE; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2(exc.name, 2); |
(void) WRITE2(": TLOSS error\n", 14); |
} */ |
errno = ERANGE; |
} |
break; |
case 40: |
case 140: |
/* gamma(finite) overflow */ |
exc.type = OVERFLOW; |
exc.name = type < 100 ? "gamma" : "gammaf"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = HUGE; |
else |
exc.retval = HUGE_VAL; |
if (_LIB_VERSION == _POSIX_) |
errno = ERANGE; |
else if (!matherr(&exc)) { |
errno = ERANGE; |
} |
break; |
case 41: |
case 141: |
/* gamma(-integer) or gamma(0) */ |
exc.type = SING; |
exc.name = type < 100 ? "gamma" : "gammaf"; |
if (_LIB_VERSION == _SVID_) |
exc.retval = HUGE; |
else |
exc.retval = HUGE_VAL; |
if (_LIB_VERSION == _POSIX_) |
errno = EDOM; |
else if (!matherr(&exc)) { |
/* if (_LIB_VERSION == _SVID_) { |
(void) WRITE2("gamma: SING error\n", 18); |
} */ |
errno = EDOM; |
} |
break; |
case 42: |
case 142: |
/* pow(NaN,0.0) */ |
/* error only if _LIB_VERSION == _SVID_ & _XOPEN_ */ |
exc.type = DOMAIN; |
exc.name = type < 100 ? "pow" : "powf"; |
exc.retval = x; |
if (_LIB_VERSION == _IEEE_ || |
_LIB_VERSION == _POSIX_) exc.retval = 1.0; |
else if (!matherr(&exc)) { |
errno = EDOM; |
} |
break; |
} |
if (exc.err != 0) |
errno = exc.err; |
return exc.retval; |
} |
|
|