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Issue #3366: Add expm1 function to math module. Thanks Eric Smith for

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testing on Windows.
This commit is contained in:
Mark Dickinson 2009-12-16 20:13:40 +00:00
parent 98e3df38fd
commit 9cae178f21
13 changed files with 162 additions and 10 deletions
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6
Modules/mathmodule.c
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@ -53,6 +53,7 @@ raised for division by zero and mod by zero.
*/
#include "Python.h"
#include "_math.h"
#include "longintrepr.h" /* just for SHIFT */
#ifdef _OSF_SOURCE
@ -686,6 +687,10 @@ FUNC1(cosh, cosh, 1,
"cosh(x)\n\nReturn the hyperbolic cosine of x.")
FUNC1(exp, exp, 1,
"exp(x)\n\nReturn e raised to the power of x.")
FUNC1(expm1, m_expm1, 1,
"expm1(x)\n\nReturn exp(x)-1.\n"
"This function avoids the loss of precision involved in the direct "
"evaluation of exp(x)-1 for small x.")
FUNC1(fabs, fabs, 0,
"fabs(x)\n\nReturn the absolute value of the float x.")
FUNC1(floor, floor, 0,
@ -1420,6 +1425,7 @@ static PyMethodDef math_methods[] = {
{"cosh", math_cosh, METH_O, math_cosh_doc},
{"degrees", math_degrees, METH_O, math_degrees_doc},
{"exp", math_exp, METH_O, math_exp_doc},
{"expm1", math_expm1, METH_O, math_expm1_doc},
{"fabs", math_fabs, METH_O, math_fabs_doc},
{"factorial", math_factorial, METH_O, math_factorial_doc},
{"floor", math_floor, METH_O, math_floor_doc},