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Feature #1534

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Added PyFloat_GetMax(), PyFloat_GetMin() and PyFloat_GetInfo() to the float API.
Added a dictionary sys.float_info with information about the internal floating point type to the sys module.
This commit is contained in:
Christian Heimes 2007-12-01 11:20:10 +00:00
parent 9f6d4ceb43
commit dfdfaab1c5
7 changed files with 120 additions and 0 deletions
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47
Objects/floatobject.c
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@ -7,6 +7,7 @@
#include "Python.h"
#include <ctype.h>
#include <float.h>
#if !defined(__STDC__)
extern double fmod(double, double);
@ -46,6 +47,52 @@ fill_free_list(void)
return p + N_FLOATOBJECTS - 1;
}
double
PyFloat_GetMax(void)
{
return DBL_MAX;
}
double
PyFloat_GetMin(void)
{
return DBL_MIN;
}
PyObject *
PyFloat_GetInfo(void)
{
PyObject *d, *tmp;
#define SET_FLOAT_CONST(d, key, const) \
tmp = PyFloat_FromDouble(const); \
if (tmp == NULL) return NULL; \
if (PyDict_SetItemString(d, key, tmp)) return NULL; \
Py_DECREF(tmp)
#define SET_INT_CONST(d, key, const) \
tmp = PyInt_FromLong(const); \
if (tmp == NULL) return NULL; \
if (PyDict_SetItemString(d, key, tmp)) return NULL; \
Py_DECREF(tmp)
d = PyDict_New();
SET_FLOAT_CONST(d, "max", DBL_MAX);
SET_INT_CONST(d, "max_exp", DBL_MAX_EXP);
SET_INT_CONST(d, "max_10_exp", DBL_MAX_10_EXP);
SET_FLOAT_CONST(d, "min", DBL_MIN);
SET_INT_CONST(d, "min_exp", DBL_MIN_EXP);
SET_INT_CONST(d, "min_10_exp", DBL_MIN_10_EXP);
SET_INT_CONST(d, "dig", DBL_DIG);
SET_INT_CONST(d, "mant_dig", DBL_MANT_DIG);
SET_FLOAT_CONST(d, "epsilon", DBL_EPSILON);
SET_INT_CONST(d, "radix", FLT_RADIX);
SET_INT_CONST(d, "rounds", FLT_ROUNDS);
return d;
}
PyObject *
PyFloat_FromDouble(double fval)
{