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PATH: opt / bitninja-python-dojo / embedded / include / python3.9

/* Float object interface */

/*
PyFloatObject represents a (double precision) floating point number.
*/

#ifndef Py_FLOATOBJECT_H
#define Py_FLOATOBJECT_H
#ifdef __cplusplus
extern "C" {
#endif

#ifndef Py_LIMITED_API
typedef struct {
    PyObject_HEAD
    double ob_fval;
} PyFloatObject;
#endif

PyAPI_DATA(PyTypeObject) PyFloat_Type;

#define PyFloat_Check(op) PyObject_TypeCheck(op, &PyFloat_Type)
#define PyFloat_CheckExact(op) Py_IS_TYPE(op, &PyFloat_Type)

#ifdef Py_NAN
#define Py_RETURN_NAN return PyFloat_FromDouble(Py_NAN)
#endif

#define Py_RETURN_INF(sign) do                     \
    if (copysign(1., sign) == 1.) {                \
        return PyFloat_FromDouble(Py_HUGE_VAL);    \
    } else {                        \
        return PyFloat_FromDouble(-Py_HUGE_VAL);   \
    } while(0)

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
   speed. */
PyAPI_FUNC(double) PyFloat_AsDouble(PyObject *);
#ifndef Py_LIMITED_API
#define PyFloat_AS_DOUBLE(op) (((PyFloatObject *)(op))->ob_fval)
#endif

#ifndef Py_LIMITED_API
/* _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
 * first, at p).
 * 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);

/* 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(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,
    PyObject *obj,
    PyObject *format_spec,
    Py_ssize_t start,
    Py_ssize_t end);
#endif /* Py_LIMITED_API */

#ifdef __cplusplus
}
#endif
#endif /* !Py_FLOATOBJECT_H */

[-] picklebufobject.h [edit]
[-] pystate.h [edit]
[-] pyexpat.h [edit]
[-] rangeobject.h [edit]
[-] eval.h [edit]
[-] namespaceobject.h [edit]
[-] funcobject.h [edit]
[-] pyfpe.h [edit]
[-] intrcheck.h [edit]
[-] pyport.h [edit]
[-] pythread.h [edit]
[-] longintrepr.h [edit]
[-] fileutils.h [edit]
[-] ceval.h [edit]
[-] dictobject.h [edit]
[-] bytesobject.h [edit]
[-] ast.h [edit]
[-] object.h [edit]
[-] modsupport.h [edit]
[-] floatobject.h [edit]
[-] enumobject.h [edit]
[-] grammar.h [edit]
[-] pystrcmp.h [edit]
[+] ..
[-] pymath.h [edit]
[-] objimpl.h [edit]
[-] opcode.h [edit]
[-] pycapsule.h [edit]
[-] warnings.h [edit]
[-] symtable.h [edit]
[-] exports.h [edit]
[-] longobject.h [edit]
[-] classobject.h [edit]
[-] import.h [edit]
[-] boolobject.h [edit]
[-] code.h [edit]
[-] genericaliasobject.h [edit]
[-] pyerrors.h [edit]
[-] datetime.h [edit]
[-] traceback.h [edit]
[-] structmember.h [edit]
[-] marshal.h [edit]
[-] osdefs.h [edit]
[-] fileobject.h [edit]
[-] genobject.h [edit]
[-] pyconfig.h [edit]
[-] typeslots.h [edit]
[-] pythonrun.h [edit]
[-] parsetok.h [edit]
[-] complexobject.h [edit]
[-] frameobject.h [edit]
[-] abstract.h [edit]
[-] descrobject.h [edit]
[-] sliceobject.h [edit]
[-] interpreteridobject.h [edit]
[-] pyframe.h [edit]
[-] iterobject.h [edit]
[-] unicodeobject.h [edit]
[-] pystrhex.h [edit]
[-] cellobject.h [edit]
[-] methodobject.h [edit]
[-] tupleobject.h [edit]
[-] pyctype.h [edit]
[-] moduleobject.h [edit]
[-] Python-ast.h [edit]
[-] patchlevel.h [edit]
[-] errcode.h [edit]
[-] bitset.h [edit]
[-] py_curses.h [edit]
[-] weakrefobject.h [edit]
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[-] bltinmodule.h [edit]
[-] pymacconfig.h [edit]
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[-] compile.h [edit]
[-] listobject.h [edit]
[-] node.h [edit]
[-] pylifecycle.h [edit]
[-] pyhash.h [edit]
[-] graminit.h [edit]
[-] pymacro.h [edit]
[-] bytearrayobject.h [edit]
[-] pydtrace.h [edit]
[+] internal
[-] memoryobject.h [edit]
[+] cpython
[-] sysmodule.h [edit]
[-] pymem.h [edit]
[-] codecs.h [edit]
[-] asdl.h [edit]
[-] dynamic_annotations.h [edit]
[-] structseq.h [edit]
[-] pydebug.h [edit]
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[-] token.h [edit]
[-] Python.h [edit]
[-] pyarena.h [edit]
[-] setobject.h [edit]
[-] pytime.h [edit]
[-] odictobject.h [edit]
[-] osmodule.h [edit]
[-] ucnhash.h [edit]