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v0.5.1
v0.5.1
https://github.com/python/cpython
Tip revision: 74f4bd53e03ded8408bcc2de67cf0f5a4ac5b1a1 authored by Barry Warsaw on 23 February 2012, 15:59:38 UTC
Bump some more copyright years (as per PEP 101), since this is the first
Bump some more copyright years (as per PEP 101), since this is the first
Tip revision: 74f4bd5
fpetestmodule.c
/*
---------------------------------------------------------------------
/ Copyright (c) 1996. \
| The Regents of the University of California. |
| All rights reserved. |
| |
| Permission to use, copy, modify, and distribute this software for |
| any purpose without fee is hereby granted, provided that this en- |
| tire notice is included in all copies of any software which is or |
| includes a copy or modification of this software and in all |
| copies of the supporting documentation for such software. |
| |
| This work was produced at the University of California, Lawrence |
| Livermore National Laboratory under contract no. W-7405-ENG-48 |
| between the U.S. Department of Energy and The Regents of the |
| University of California for the operation of UC LLNL. |
| |
| DISCLAIMER |
| |
| This software was prepared as an account of work sponsored by an |
| agency of the United States Government. Neither the United States |
| Government nor the University of California nor any of their em- |
| ployees, makes any warranty, express or implied, or assumes any |
| liability or responsibility for the accuracy, completeness, or |
| usefulness of any information, apparatus, product, or process |
| disclosed, or represents that its use would not infringe |
| privately-owned rights. Reference herein to any specific commer- |
| cial products, process, or service by trade name, trademark, |
| manufacturer, or otherwise, does not necessarily constitute or |
| imply its endorsement, recommendation, or favoring by the United |
| States Government or the University of California. The views and |
| opinions of authors expressed herein do not necessarily state or |
| reflect those of the United States Government or the University |
| of California, and shall not be used for advertising or product |
\ endorsement purposes. /
---------------------------------------------------------------------
*/
/*
Floating point exception test module.
*/
#include "Python.h"
static PyObject *fpe_error;
PyMODINIT_FUNC initfpetest(void);
static PyObject *test(PyObject *self,PyObject *args);
static double db0(double);
static double overflow(double);
static double nest1(int, double);
static double nest2(int, double);
static double nest3(double);
static void printerr(double);
static PyMethodDef fpetest_methods[] = {
{"test", (PyCFunction) test, METH_VARARGS},
{0,0}
};
static PyObject *test(PyObject *self,PyObject *args)
{
double r;
fprintf(stderr,"overflow");
r = overflow(1.e160);
printerr(r);
fprintf(stderr,"\ndiv by 0");
r = db0(0.0);
printerr(r);
fprintf(stderr,"\nnested outer");
r = nest1(0, 0.0);
printerr(r);
fprintf(stderr,"\nnested inner");
r = nest1(1, 1.0);
printerr(r);
fprintf(stderr,"\ntrailing outer");
r = nest1(2, 2.0);
printerr(r);
fprintf(stderr,"\nnested prior");
r = nest2(0, 0.0);
printerr(r);
fprintf(stderr,"\nnested interior");
r = nest2(1, 1.0);
printerr(r);
fprintf(stderr,"\nnested trailing");
r = nest2(2, 2.0);
printerr(r);
Py_INCREF (Py_None);
return Py_None;
}
static void printerr(double r)
{
if(r == 3.1416){
fprintf(stderr,"\tPASS\n");
PyErr_Print();
}else{
fprintf(stderr,"\tFAIL\n");
}
PyErr_Clear();
}
static double nest1(int i, double x)
{
double a = 1.0;
PyFPE_START_PROTECT("Division by zero, outer zone", return 3.1416)
if(i == 0){
a = 1./x;
}else if(i == 1){
/* This (following) message is never seen. */
PyFPE_START_PROTECT("Division by zero, inner zone", return 3.1416)
a = 1./(1. - x);
PyFPE_END_PROTECT(a)
}else if(i == 2){
a = 1./(2. - x);
}
PyFPE_END_PROTECT(a)
return a;
}
static double nest2(int i, double x)
{
double a = 1.0;
PyFPE_START_PROTECT("Division by zero, prior error", return 3.1416)
if(i == 0){
a = 1./x;
}else if(i == 1){
a = nest3(x);
}else if(i == 2){
a = 1./(2. - x);
}
PyFPE_END_PROTECT(a)
return a;
}
static double nest3(double x)
{
double result;
/* This (following) message is never seen. */
PyFPE_START_PROTECT("Division by zero, nest3 error", return 3.1416)
result = 1./(1. - x);
PyFPE_END_PROTECT(result)
return result;
}
static double db0(double x)
{
double a;
PyFPE_START_PROTECT("Division by zero", return 3.1416)
a = 1./x;
PyFPE_END_PROTECT(a)
return a;
}
static double overflow(double b)
{
double a;
PyFPE_START_PROTECT("Overflow", return 3.1416)
a = b*b;
PyFPE_END_PROTECT(a)
return a;
}
PyMODINIT_FUNC initfpetest(void)
{
PyObject *m, *d;
m = Py_InitModule("fpetest", fpetest_methods);
if (m == NULL)
return;
d = PyModule_GetDict(m);
fpe_error = PyErr_NewException("fpetest.error", NULL, NULL);
if (fpe_error != NULL)
PyDict_SetItemString(d, "error", fpe_error);
}