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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4921 | Serge | 1 | /* |
| 2 | * return (*acc) scaled by 10**dexp. |
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| 3 | */ |
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| 4 | |||
| 5 | #include <_ansi.h> |
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| 6 | #include |
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| 7 | #include "std.h" |
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| 8 | |||
| 9 | #define abs(x) (((x) < 0) ? -(x) : (x)) |
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| 10 | |||
| 11 | double |
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| 12 | _DEFUN (__adjust, (ptr, acc, dexp, sign), |
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| 13 | struct _reent *ptr _AND |
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| 14 | double *acc _AND |
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| 15 | int dexp _AND |
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| 16 | int sign) |
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| 17 | /* *acc the 64 bit accumulator */ |
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| 18 | /* dexp decimal exponent */ |
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| 19 | /* sign sign flag */ |
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| 20 | { |
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| 21 | double r; |
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| 22 | |||
| 23 | if (dexp > MAXE) |
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| 24 | { |
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| 25 | ptr->_errno = ERANGE; |
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| 26 | return (sign) ? -HUGE_VAL : HUGE_VAL; |
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| 27 | } |
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| 28 | else if (dexp < MINE) |
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| 29 | { |
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| 30 | ptr->_errno = ERANGE; |
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| 31 | return 0.0; |
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| 32 | } |
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| 33 | |||
| 34 | r = *acc; |
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| 35 | if (sign) |
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| 36 | r = -r; |
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| 37 | if (dexp == 0) |
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| 38 | return r; |
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| 39 | |||
| 40 | if (dexp < 0) |
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| 41 | return r / __exp10 (abs (dexp)); |
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| 42 | else |
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| 43 | return r * __exp10 (dexp); |
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| 44 | } |