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- #ifndef Py_LONGOBJECT_H
- #define Py_LONGOBJECT_H
- #ifdef __cplusplus
- extern "C" {
- #endif
-
-
- /* Long (arbitrary precision) integer object interface */
-
- typedef struct _longobject PyLongObject; /* Revealed in longintrepr.h */
-
- PyAPI_DATA(PyTypeObject) PyLong_Type;
-
- #define PyLong_Check(op) PyObject_TypeCheck(op, &PyLong_Type)
- #define PyLong_CheckExact(op) ((op)->ob_type == &PyLong_Type)
-
- PyAPI_FUNC(PyObject *) PyLong_FromLong(long);
- PyAPI_FUNC(PyObject *) PyLong_FromUnsignedLong(unsigned long);
- PyAPI_FUNC(PyObject *) PyLong_FromDouble(double);
- PyAPI_FUNC(long) PyLong_AsLong(PyObject *);
- PyAPI_FUNC(unsigned long) PyLong_AsUnsignedLong(PyObject *);
- PyAPI_FUNC(unsigned long) PyLong_AsUnsignedLongMask(PyObject *);
-
- /* _PyLong_AsScaledDouble returns a double x and an exponent e such that
- the true value is approximately equal to x * 2**(SHIFT*e). e is >= 0.
- x is 0.0 if and only if the input is 0 (in which case, e and x are both
- zeroes). Overflow is impossible. Note that the exponent returned must
- be multiplied by SHIFT! There may not be enough room in an int to store
- e*SHIFT directly. */
- PyAPI_FUNC(double) _PyLong_AsScaledDouble(PyObject *vv, int *e);
-
- PyAPI_FUNC(double) PyLong_AsDouble(PyObject *);
- PyAPI_FUNC(PyObject *) PyLong_FromVoidPtr(void *);
- PyAPI_FUNC(void *) PyLong_AsVoidPtr(PyObject *);
-
- #ifdef HAVE_LONG_LONG
- PyAPI_FUNC(PyObject *) PyLong_FromLongLong(PY_LONG_LONG);
- PyAPI_FUNC(PyObject *) PyLong_FromUnsignedLongLong(unsigned PY_LONG_LONG);
- PyAPI_FUNC(PY_LONG_LONG) PyLong_AsLongLong(PyObject *);
- PyAPI_FUNC(unsigned PY_LONG_LONG) PyLong_AsUnsignedLongLong(PyObject *);
- PyAPI_FUNC(unsigned PY_LONG_LONG) PyLong_AsUnsignedLongLongMask(PyObject *);
- #endif /* HAVE_LONG_LONG */
-
- PyAPI_FUNC(PyObject *) PyLong_FromString(char *, char **, int);
- #ifdef Py_USING_UNICODE
- PyAPI_FUNC(PyObject *) PyLong_FromUnicode(Py_UNICODE*, int, int);
- #endif
-
- /* _PyLong_Sign. Return 0 if v is 0, -1 if v < 0, +1 if v > 0.
- v must not be NULL, and must be a normalized long.
- There are no error cases.
- */
- PyAPI_FUNC(int) _PyLong_Sign(PyObject *v);
-
-
- PyAPI_FUNC(size_t) _PyLong_NumBits(PyObject *v);
- /* _PyLong_NumBits. Return the number of bits needed to represent the
- absolute value of a long. For example, this returns 1 for 1 and -1, 2
- for 2 and -2, and 2 for 3 and -3. It returns 0 for 0.
- v must not be NULL, and must be a normalized long.
- (size_t)-1 is returned and OverflowError set if the true result doesn't
- fit in a size_t.
- */
- PyAPI_FUNC(size_t) _PyLong_NumBits(PyObject *v);
-
- /* _PyLong_FromByteArray: View the n unsigned bytes as a binary integer in
- base 256, and return a Python long with the same numeric value.
- If n is 0, the integer is 0. Else:
- If little_endian is 1/true, bytes[n-1] is the MSB and bytes[0] the LSB;
- else (little_endian is 0/false) bytes[0] is the MSB and bytes[n-1] the
- LSB.
- If is_signed is 0/false, view the bytes as a non-negative integer.
- If is_signed is 1/true, view the bytes as a 2's-complement integer,
- non-negative if bit 0x80 of the MSB is clear, negative if set.
- Error returns:
- + Return NULL with the appropriate exception set if there's not
- enough memory to create the Python long.
- */
- PyAPI_FUNC(PyObject *) _PyLong_FromByteArray(
- const unsigned char* bytes, size_t n,
- int little_endian, int is_signed);
-
- /* _PyLong_AsByteArray: Convert the least-significant 8*n bits of long
- v to a base-256 integer, stored in array bytes. Normally return 0,
- return -1 on error.
- If little_endian is 1/true, store the MSB at bytes[n-1] and the LSB at
- bytes[0]; else (little_endian is 0/false) store the MSB at bytes[0] and
- the LSB at bytes[n-1].
- If is_signed is 0/false, it's an error if v < 0; else (v >= 0) n bytes
- are filled and there's nothing special about bit 0x80 of the MSB.
- If is_signed is 1/true, bytes is filled with the 2's-complement
- representation of v's value. Bit 0x80 of the MSB is the sign bit.
- Error returns (-1):
- + is_signed is 0 and v < 0. TypeError is set in this case, and bytes
- isn't altered.
- + n isn't big enough to hold the full mathematical value of v. For
- example, if is_signed is 0 and there are more digits in the v than
- fit in n; or if is_signed is 1, v < 0, and n is just 1 bit shy of
- being large enough to hold a sign bit. OverflowError is set in this
- case, but bytes holds the least-signficant n bytes of the true value.
- */
- PyAPI_FUNC(int) _PyLong_AsByteArray(PyLongObject* v,
- unsigned char* bytes, size_t n,
- int little_endian, int is_signed);
-
- #ifdef __cplusplus
- }
- #endif
- #endif /* !Py_LONGOBJECT_H */
-