diff options
Diffstat (limited to 'sal/inc/rtl/math.h')
| -rw-r--r-- | sal/inc/rtl/math.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/sal/inc/rtl/math.h b/sal/inc/rtl/math.h index 96e2a02045b5..12cf825da464 100644 --- a/sal/inc/rtl/math.h +++ b/sal/inc/rtl/math.h @@ -406,6 +406,24 @@ double SAL_CALL rtl_math_pow10Exp(double fValue, int nExp) SAL_THROW_EXTERN_C(); */ double SAL_CALL rtl_math_approxValue(double fValue) SAL_THROW_EXTERN_C(); +/** Returns more accurate e^x-1 for x near 0 than calculating directly. + + expm1 is part of the C99 standard, but not provided by some compilers. + + @param fValue + The value x in the term e^x-1. + */ +double SAL_CALL rtl_math_expm1(double fValue) SAL_THROW_EXTERN_C(); + +/** Returns more accurate log(1+x) for x near 0 than calculating directly. + + log1p is part of the C99 standard, but not provided by some compilers. + + @param fValue + The value x in the term log(1+x). + */ +double SAL_CALL rtl_math_log1p(double fValue) SAL_THROW_EXTERN_C(); + #if defined __cplusplus } #endif /* __cplusplus */ |