/* Float object interface */
PyFloatObject represents a (double precision) floating point number.
PyAPI_DATA(PyTypeObject) PyFloat_Type;
#define PyFloat_Check(op) PyObject_TypeCheck(op, &PyFloat_Type)
#define PyFloat_CheckExact(op) (Py_TYPE(op) == &PyFloat_Type)
#define Py_RETURN_NAN return PyFloat_FromDouble(Py_NAN)
#define Py_RETURN_INF(sign) do \
if (copysign(1., sign) == 1.) { \
return PyFloat_FromDouble(Py_HUGE_VAL); \
return PyFloat_FromDouble(-Py_HUGE_VAL); \
PyAPI_FUNC(double) PyFloat_GetMax(void);
PyAPI_FUNC(double) PyFloat_GetMin(void);
PyAPI_FUNC(PyObject *) PyFloat_GetInfo(void);
/* Return Python float from string PyObject. */
PyAPI_FUNC(PyObject *) PyFloat_FromString(PyObject*);
/* Return Python float from C double. */
PyAPI_FUNC(PyObject *) PyFloat_FromDouble(double);
/* Extract C double from Python float. The macro version trades safety for
PyAPI_FUNC(double) PyFloat_AsDouble(PyObject *);
#define PyFloat_AS_DOUBLE(op) (((PyFloatObject *)(op))->ob_fval)
/* _PyFloat_{Pack,Unpack}{4,8}
* The struct and pickle (at least) modules need an efficient platform-
* independent way to store floating-point values as byte strings.
* The Pack routines produce a string from a C double, and the Unpack
* routines produce a C double from such a string. The suffix (4 or 8)
* specifies the number of bytes in the string.
* On platforms that appear to use (see _PyFloat_Init()) IEEE-754 formats
* these functions work by copying bits. On other platforms, the formats the
* 4- byte format is identical to the IEEE-754 single precision format, and
* the 8-byte format to the IEEE-754 double precision format, although the
* packing of INFs and NaNs (if such things exist on the platform) isn't
* handled correctly, and attempting to unpack a string containing an IEEE
* INF or NaN will raise an exception.
* On non-IEEE platforms with more precision, or larger dynamic range, than
* 754 supports, not all values can be packed; on non-IEEE platforms with less
* precision, or smaller dynamic range, not all values can be unpacked. What
* happens in such cases is partly accidental (alas).
/* The pack routines write 2, 4 or 8 bytes, starting at p. le is a bool
* argument, true if you want the string in little-endian format (exponent
* last, at p+1, p+3 or p+7), false if you want big-endian format (exponent
* Return value: 0 if all is OK, -1 if error (and an exception is
* set, most likely OverflowError).
* There are two problems on non-IEEE platforms:
* 1): What this does is undefined if x is a NaN or infinity.
* 2): -0.0 and +0.0 produce the same string.
PyAPI_FUNC(int) _PyFloat_Pack2(double x, unsigned char *p, int le);
PyAPI_FUNC(int) _PyFloat_Pack4(double x, unsigned char *p, int le);
PyAPI_FUNC(int) _PyFloat_Pack8(double x, unsigned char *p, int le);
/* Needed for the old way for marshal to store a floating point number.
Returns the string length copied into p, -1 on error.
PyAPI_FUNC(int) _PyFloat_Repr(double x, char *p, size_t len);
/* Used to get the important decimal digits of a double */
PyAPI_FUNC(int) _PyFloat_Digits(char *buf, double v, int *signum);
PyAPI_FUNC(void) _PyFloat_DigitsInit(void);
/* The unpack routines read 2, 4 or 8 bytes, starting at p. le is a bool
* argument, true if the string is in little-endian format (exponent
* last, at p+1, p+3 or p+7), false if big-endian (exponent first, at p).
* Return value: The unpacked double. On error, this is -1.0 and
* PyErr_Occurred() is true (and an exception is set, most likely
* OverflowError). Note that on a non-IEEE platform this will refuse
* to unpack a string that represents a NaN or infinity.
PyAPI_FUNC(double) _PyFloat_Unpack2(const unsigned char *p, int le);
PyAPI_FUNC(double) _PyFloat_Unpack4(const unsigned char *p, int le);
PyAPI_FUNC(double) _PyFloat_Unpack8(const unsigned char *p, int le);
PyAPI_FUNC(int) PyFloat_ClearFreeList(void);
PyAPI_FUNC(void) _PyFloat_DebugMallocStats(FILE* out);
/* Format the object based on the format_spec, as defined in PEP 3101
(Advanced String Formatting). */
PyAPI_FUNC(int) _PyFloat_FormatAdvancedWriter(
_PyUnicodeWriter *writer,
#endif /* Py_LIMITED_API */
#endif /* !Py_FLOATOBJECT_H */
It is recommended that you Edit text format, this type of Fix handles quite a lot in one request
