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[3.6] fixes bpo-31373: fix undefined floating-point demotions (GH-3396) (#3424)

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(cherry picked from commit a853a8ba78)
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Miss Islington (bot) 2017-09-07 11:35:03 -07:00 • committed by Benjamin Peterson
parent b0d0217c0e
commit b03623227e
5 changed files with 51 additions and 30 deletions
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5
Python/getargs.c
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@ -4,6 +4,7 @@
#include "Python.h"
#include <ctype.h>
#include <float.h>
#ifdef __cplusplus
@ -810,6 +811,10 @@ convertsimple(PyObject *arg, const char **p_format, va_list *p_va, int flags,
double dval = PyFloat_AsDouble(arg);
if (PyErr_Occurred())
RETURN_ERR_OCCURRED;
else if (dval > FLT_MAX)
*p = (float)INFINITY;
else if (dval < -FLT_MAX)
*p = (float)-INFINITY;
else
*p = (float) dval;
break;