1#ifndef Py_CPYTHON_LONGOBJECT_H
2#  error "this header file must not be included directly"
3#endif
4
5PyAPI_FUNC(int) _PyLong_AsInt(PyObject *);
6
7PyAPI_FUNC(int) _PyLong_UnsignedShort_Converter(PyObject *, void *);
8PyAPI_FUNC(int) _PyLong_UnsignedInt_Converter(PyObject *, void *);
9PyAPI_FUNC(int) _PyLong_UnsignedLong_Converter(PyObject *, void *);
10PyAPI_FUNC(int) _PyLong_UnsignedLongLong_Converter(PyObject *, void *);
11PyAPI_FUNC(int) _PyLong_Size_t_Converter(PyObject *, void *);
12
13/* _PyLong_Frexp returns a double x and an exponent e such that the
14   true value is approximately equal to x * 2**e.  e is >= 0.  x is
15   0.0 if and only if the input is 0 (in which case, e and x are both
16   zeroes); otherwise, 0.5 <= abs(x) < 1.0.  On overflow, which is
17   possible if the number of bits doesn't fit into a Py_ssize_t, sets
18   OverflowError and returns -1.0 for x, 0 for e. */
19PyAPI_FUNC(double) _PyLong_Frexp(PyLongObject *a, Py_ssize_t *e);
20
21PyAPI_FUNC(PyObject *) PyLong_FromUnicodeObject(PyObject *u, int base);
22PyAPI_FUNC(PyObject *) _PyLong_FromBytes(const char *, Py_ssize_t, int);
23
24/* _PyLong_Sign.  Return 0 if v is 0, -1 if v < 0, +1 if v > 0.
25   v must not be NULL, and must be a normalized long.
26   There are no error cases.
27*/
28PyAPI_FUNC(int) _PyLong_Sign(PyObject *v);
29
30/* _PyLong_NumBits.  Return the number of bits needed to represent the
31   absolute value of a long.  For example, this returns 1 for 1 and -1, 2
32   for 2 and -2, and 2 for 3 and -3.  It returns 0 for 0.
33   v must not be NULL, and must be a normalized long.
34   (size_t)-1 is returned and OverflowError set if the true result doesn't
35   fit in a size_t.
36*/
37PyAPI_FUNC(size_t) _PyLong_NumBits(PyObject *v);
38
39/* _PyLong_DivmodNear.  Given integers a and b, compute the nearest
40   integer q to the exact quotient a / b, rounding to the nearest even integer
41   in the case of a tie.  Return (q, r), where r = a - q*b.  The remainder r
42   will satisfy abs(r) <= abs(b)/2, with equality possible only if q is
43   even.
44*/
45PyAPI_FUNC(PyObject *) _PyLong_DivmodNear(PyObject *, PyObject *);
46
47/* _PyLong_FromByteArray:  View the n unsigned bytes as a binary integer in
48   base 256, and return a Python int with the same numeric value.
49   If n is 0, the integer is 0.  Else:
50   If little_endian is 1/true, bytes[n-1] is the MSB and bytes[0] the LSB;
51   else (little_endian is 0/false) bytes[0] is the MSB and bytes[n-1] the
52   LSB.
53   If is_signed is 0/false, view the bytes as a non-negative integer.
54   If is_signed is 1/true, view the bytes as a 2's-complement integer,
55   non-negative if bit 0x80 of the MSB is clear, negative if set.
56   Error returns:
57   + Return NULL with the appropriate exception set if there's not
58     enough memory to create the Python int.
59*/
60PyAPI_FUNC(PyObject *) _PyLong_FromByteArray(
61    const unsigned char* bytes, size_t n,
62    int little_endian, int is_signed);
63
64/* _PyLong_AsByteArray: Convert the least-significant 8*n bits of long
65   v to a base-256 integer, stored in array bytes.  Normally return 0,
66   return -1 on error.
67   If little_endian is 1/true, store the MSB at bytes[n-1] and the LSB at
68   bytes[0]; else (little_endian is 0/false) store the MSB at bytes[0] and
69   the LSB at bytes[n-1].
70   If is_signed is 0/false, it's an error if v < 0; else (v >= 0) n bytes
71   are filled and there's nothing special about bit 0x80 of the MSB.
72   If is_signed is 1/true, bytes is filled with the 2's-complement
73   representation of v's value.  Bit 0x80 of the MSB is the sign bit.
74   Error returns (-1):
75   + is_signed is 0 and v < 0.  TypeError is set in this case, and bytes
76     isn't altered.
77   + n isn't big enough to hold the full mathematical value of v.  For
78     example, if is_signed is 0 and there are more digits in the v than
79     fit in n; or if is_signed is 1, v < 0, and n is just 1 bit shy of
80     being large enough to hold a sign bit.  OverflowError is set in this
81     case, but bytes holds the least-significant n bytes of the true value.
82*/
83PyAPI_FUNC(int) _PyLong_AsByteArray(PyLongObject* v,
84    unsigned char* bytes, size_t n,
85    int little_endian, int is_signed);
86
87/* _PyLong_Format: Convert the long to a string object with given base,
88   appending a base prefix of 0[box] if base is 2, 8 or 16. */
89PyAPI_FUNC(PyObject *) _PyLong_Format(PyObject *obj, int base);
90
91/* For use by the gcd function in mathmodule.c */
92PyAPI_FUNC(PyObject *) _PyLong_GCD(PyObject *, PyObject *);
93
94PyAPI_FUNC(PyObject *) _PyLong_Rshift(PyObject *, size_t);
95PyAPI_FUNC(PyObject *) _PyLong_Lshift(PyObject *, size_t);
96