[Python-checkins] gh-102839: remove AC for math.log (GH-102863)
rhettinger
webhook-mailer at python.org
Tue Mar 21 19:48:26 EDT 2023
https://github.com/python/cpython/commit/d1a89ce5156cd4e1eff5823ec2200885c43e395e
commit: d1a89ce5156cd4e1eff5823ec2200885c43e395e
branch: main
author: Sergey B Kirpichev <skirpichev at gmail.com>
committer: rhettinger <rhettinger at users.noreply.github.com>
date: 2023-03-21T18:48:19-05:00
summary:
gh-102839: remove AC for math.log (GH-102863)
files:
A Misc/NEWS.d/next/Library/2023-03-20-12-21-19.gh-issue-102839.RjRi12.rst
M Modules/clinic/mathmodule.c.h
M Modules/mathmodule.c
diff --git a/Misc/NEWS.d/next/Library/2023-03-20-12-21-19.gh-issue-102839.RjRi12.rst b/Misc/NEWS.d/next/Library/2023-03-20-12-21-19.gh-issue-102839.RjRi12.rst
new file mode 100644
index 000000000000..673b38974e4d
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2023-03-20-12-21-19.gh-issue-102839.RjRi12.rst
@@ -0,0 +1 @@
+Improve performance of :func:`math.log` arguments handling by removing the argument clinic.
diff --git a/Modules/clinic/mathmodule.c.h b/Modules/clinic/mathmodule.c.h
index 1f9725883b98..bc5bbceb4c92 100644
--- a/Modules/clinic/mathmodule.c.h
+++ b/Modules/clinic/mathmodule.c.h
@@ -186,49 +186,6 @@ math_modf(PyObject *module, PyObject *arg)
return return_value;
}
-PyDoc_STRVAR(math_log__doc__,
-"log(x, [base=math.e])\n"
-"Return the logarithm of x to the given base.\n"
-"\n"
-"If the base not specified, returns the natural logarithm (base e) of x.");
-
-#define MATH_LOG_METHODDEF \
- {"log", (PyCFunction)math_log, METH_VARARGS, math_log__doc__},
-
-static PyObject *
-math_log_impl(PyObject *module, PyObject *x, int group_right_1,
- PyObject *base);
-
-static PyObject *
-math_log(PyObject *module, PyObject *args)
-{
- PyObject *return_value = NULL;
- PyObject *x;
- int group_right_1 = 0;
- PyObject *base = NULL;
-
- switch (PyTuple_GET_SIZE(args)) {
- case 1:
- if (!PyArg_ParseTuple(args, "O:log", &x)) {
- goto exit;
- }
- break;
- case 2:
- if (!PyArg_ParseTuple(args, "OO:log", &x, &base)) {
- goto exit;
- }
- group_right_1 = 1;
- break;
- default:
- PyErr_SetString(PyExc_TypeError, "math.log requires 1 to 2 arguments");
- goto exit;
- }
- return_value = math_log_impl(module, x, group_right_1, base);
-
-exit:
- return return_value;
-}
-
PyDoc_STRVAR(math_log2__doc__,
"log2($module, x, /)\n"
"--\n"
@@ -954,4 +911,4 @@ math_ulp(PyObject *module, PyObject *arg)
exit:
return return_value;
}
-/*[clinic end generated code: output=899211ec70e4506c input=a9049054013a1b77]*/
+/*[clinic end generated code: output=a6437a3ba18c486a input=a9049054013a1b77]*/
diff --git a/Modules/mathmodule.c b/Modules/mathmodule.c
index c9a2be668639..473936edb3f5 100644
--- a/Modules/mathmodule.c
+++ b/Modules/mathmodule.c
@@ -2284,33 +2284,22 @@ loghelper(PyObject* arg, double (*func)(double))
}
-/*[clinic input]
-math.log
-
- x: object
- [
- base: object(c_default="NULL") = math.e
- ]
- /
-
-Return the logarithm of x to the given base.
-
-If the base not specified, returns the natural logarithm (base e) of x.
-[clinic start generated code]*/
-
+/* AC: cannot convert yet, see gh-102839 and gh-89381, waiting
+ for support of multiple signatures */
static PyObject *
-math_log_impl(PyObject *module, PyObject *x, int group_right_1,
- PyObject *base)
-/*[clinic end generated code: output=7b5a39e526b73fc9 input=0f62d5726cbfebbd]*/
+math_log(PyObject *module, PyObject * const *args, Py_ssize_t nargs)
{
PyObject *num, *den;
PyObject *ans;
- num = loghelper(x, m_log);
- if (num == NULL || base == NULL)
+ if (!_PyArg_CheckPositional("log", nargs, 1, 2))
+ return NULL;
+
+ num = loghelper(args[0], m_log);
+ if (num == NULL || nargs == 1)
return num;
- den = loghelper(base, m_log);
+ den = loghelper(args[1], m_log);
if (den == NULL) {
Py_DECREF(num);
return NULL;
@@ -2322,6 +2311,10 @@ math_log_impl(PyObject *module, PyObject *x, int group_right_1,
return ans;
}
+PyDoc_STRVAR(math_log_doc,
+"log(x, [base=math.e])\n\
+Return the logarithm of x to the given base.\n\n\
+If the base not specified, returns the natural logarithm (base e) of x.");
/*[clinic input]
math.log2
@@ -4045,7 +4038,7 @@ static PyMethodDef math_methods[] = {
{"lcm", _PyCFunction_CAST(math_lcm), METH_FASTCALL, math_lcm_doc},
MATH_LDEXP_METHODDEF
{"lgamma", math_lgamma, METH_O, math_lgamma_doc},
- MATH_LOG_METHODDEF
+ {"log", _PyCFunction_CAST(math_log), METH_FASTCALL, math_log_doc},
{"log1p", math_log1p, METH_O, math_log1p_doc},
MATH_LOG10_METHODDEF
MATH_LOG2_METHODDEF
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