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| Rev | Author | Line No. | Line |
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| 4349 | Serge | 1 | |
| 2 | /* |
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| 3 | * ==================================================== |
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| 4 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
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| 5 | * |
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| 6 | * Developed at SunPro, a Sun Microsystems, Inc. business. |
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| 7 | * Permission to use, copy, modify, and distribute this |
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| 8 | * software is freely granted, provided that this notice |
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| 9 | * is preserved. |
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| 10 | * ==================================================== |
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| 11 | */ |
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| 12 | |||
| 13 | |||
| 14 | * wrapper double gamma_r(double x, int *signgamp) |
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| 15 | */ |
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| 16 | |||
| 17 | |||
| 18 | #include |
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| 19 | |||
| 20 | |||
| 21 | |||
| 22 | |||
| 23 | double gamma_r(double x, int *signgamp) /* wrapper lgamma_r */ |
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| 24 | #else |
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| 25 | double gamma_r(x,signgamp) /* wrapper lgamma_r */ |
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| 26 | double x; int *signgamp; |
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| 27 | #endif |
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| 28 | { |
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| 29 | #ifdef _IEEE_LIBM |
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| 30 | return __ieee754_gamma_r(x,signgamp); |
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| 31 | #else |
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| 32 | double y; |
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| 33 | struct exception exc; |
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| 34 | y = __ieee754_gamma_r(x,signgamp); |
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| 35 | if(_LIB_VERSION == _IEEE_) return y; |
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| 36 | if(!finite(y)&&finite(x)) { |
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| 37 | #ifndef HUGE_VAL |
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| 38 | #define HUGE_VAL inf |
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| 39 | double inf = 0.0; |
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| 40 | |||
| 41 | |||
| 42 | #endif |
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| 43 | exc.name = "gamma"; |
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| 44 | exc.err = 0; |
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| 45 | exc.arg1 = exc.arg2 = (double)x; |
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| 46 | if (_LIB_VERSION == _SVID_) |
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| 47 | exc.retval = HUGE; |
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| 48 | else |
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| 49 | exc.retval = HUGE_VAL; |
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| 50 | if(floor(x)==x&&x<=0.0) { |
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| 51 | /* gamma(-integer) or gamma(0) */ |
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| 52 | exc.type = SING; |
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| 53 | if (_LIB_VERSION == _POSIX_) |
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| 54 | errno = EDOM; |
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| 55 | else if (!matherr(&exc)) { |
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| 56 | errno = EDOM; |
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| 57 | } |
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| 58 | } else { |
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| 59 | /* gamma(finite) overflow */ |
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| 60 | exc.type = OVERFLOW; |
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| 61 | if (_LIB_VERSION == _POSIX_) |
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| 62 | errno = ERANGE; |
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| 63 | else if (!matherr(&exc)) { |
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| 64 | errno = ERANGE; |
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| 65 | } |
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| 66 | } |
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| 67 | if (exc.err != 0) |
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| 68 | errno = exc.err; |
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| 69 | return exc.retval; |
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| 70 | } else |
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| 71 | return y; |
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| 72 | #endif |
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| 73 | } |
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| 74 | |||
| 75 | |||
| 76 |