1#ifndef Py_LONGOBJECT_H
2#define Py_LONGOBJECT_H
3#ifdef __cplusplus
4extern "C" {
5#endif
6
7
8/* Long (arbitrary precision) integer object interface */
9
10typedef struct _longobject PyLongObject; /* Revealed in longintrepr.h */
11
12PyAPI_DATA(PyTypeObject) PyLong_Type;
13
14#define PyLong_Check(op) \
15 PyType_FastSubclass(Py_TYPE(op), Py_TPFLAGS_LONG_SUBCLASS)
16#define PyLong_CheckExact(op) (Py_TYPE(op) == &PyLong_Type)
17
18PyAPI_FUNC(PyObject *) PyLong_FromLong(long);
19PyAPI_FUNC(PyObject *) PyLong_FromUnsignedLong(unsigned long);
20PyAPI_FUNC(PyObject *) PyLong_FromDouble(double);
21PyAPI_FUNC(PyObject *) PyLong_FromSize_t(size_t);
22PyAPI_FUNC(PyObject *) PyLong_FromSsize_t(Py_ssize_t);
23PyAPI_FUNC(long) PyLong_AsLong(PyObject *);
24PyAPI_FUNC(long) PyLong_AsLongAndOverflow(PyObject *, int *);
25PyAPI_FUNC(unsigned long) PyLong_AsUnsignedLong(PyObject *);
26PyAPI_FUNC(unsigned long) PyLong_AsUnsignedLongMask(PyObject *);
27PyAPI_FUNC(Py_ssize_t) PyLong_AsSsize_t(PyObject *);
28PyAPI_FUNC(int) _PyLong_AsInt(PyObject *);
29PyAPI_FUNC(PyObject *) PyLong_GetInfo(void);
30
31/* For use by intobject.c only */
32#define _PyLong_AsSsize_t PyLong_AsSsize_t
33#define _PyLong_FromSize_t PyLong_FromSize_t
34#define _PyLong_FromSsize_t PyLong_FromSsize_t
35PyAPI_DATA(int) _PyLong_DigitValue[256];
36
37/* _PyLong_Frexp returns a double x and an exponent e such that the
38 true value is approximately equal to x * 2**e. e is >= 0. x is
39 0.0 if and only if the input is 0 (in which case, e and x are both
40 zeroes); otherwise, 0.5 <= abs(x) < 1.0. On overflow, which is
41 possible if the number of bits doesn't fit into a Py_ssize_t, sets
42 OverflowError and returns -1.0 for x, 0 for e. */
43PyAPI_FUNC(double) _PyLong_Frexp(PyLongObject *a, Py_ssize_t *e);
44
45PyAPI_FUNC(double) PyLong_AsDouble(PyObject *);
46PyAPI_FUNC(PyObject *) PyLong_FromVoidPtr(void *);
47PyAPI_FUNC(void *) PyLong_AsVoidPtr(PyObject *);
48
49#ifdef HAVE_LONG_LONG
50PyAPI_FUNC(PyObject *) PyLong_FromLongLong(PY_LONG_LONG);
51PyAPI_FUNC(PyObject *) PyLong_FromUnsignedLongLong(unsigned PY_LONG_LONG);
52PyAPI_FUNC(PY_LONG_LONG) PyLong_AsLongLong(PyObject *);
53PyAPI_FUNC(unsigned PY_LONG_LONG) PyLong_AsUnsignedLongLong(PyObject *);
54PyAPI_FUNC(unsigned PY_LONG_LONG) PyLong_AsUnsignedLongLongMask(PyObject *);
55PyAPI_FUNC(PY_LONG_LONG) PyLong_AsLongLongAndOverflow(PyObject *, int *);
56#endif /* HAVE_LONG_LONG */
57
58PyAPI_FUNC(PyObject *) PyLong_FromString(char *, char **, int);
59#ifdef Py_USING_UNICODE
60PyAPI_FUNC(PyObject *) PyLong_FromUnicode(Py_UNICODE*, Py_ssize_t, int);
61#endif
62
63/* _PyLong_Sign. Return 0 if v is 0, -1 if v < 0, +1 if v > 0.
64 v must not be NULL, and must be a normalized long.
65 There are no error cases.
66*/
67PyAPI_FUNC(int) _PyLong_Sign(PyObject *v);
68
69
70/* _PyLong_NumBits. Return the number of bits needed to represent the
71 absolute value of a long. For example, this returns 1 for 1 and -1, 2
72 for 2 and -2, and 2 for 3 and -3. It returns 0 for 0.
73 v must not be NULL, and must be a normalized long.
74 (size_t)-1 is returned and OverflowError set if the true result doesn't
75 fit in a size_t.
76*/
77PyAPI_FUNC(size_t) _PyLong_NumBits(PyObject *v);
78
79/* _PyLong_FromByteArray: View the n unsigned bytes as a binary integer in
80 base 256, and return a Python long with the same numeric value.
81 If n is 0, the integer is 0. Else:
82 If little_endian is 1/true, bytes[n-1] is the MSB and bytes[0] the LSB;
83 else (little_endian is 0/false) bytes[0] is the MSB and bytes[n-1] the
84 LSB.
85 If is_signed is 0/false, view the bytes as a non-negative integer.
86 If is_signed is 1/true, view the bytes as a 2's-complement integer,
87 non-negative if bit 0x80 of the MSB is clear, negative if set.
88 Error returns:
89 + Return NULL with the appropriate exception set if there's not
90 enough memory to create the Python long.
91*/
92PyAPI_FUNC(PyObject *) _PyLong_FromByteArray(
93 const unsigned char* bytes, size_t n,
94 int little_endian, int is_signed);
95
96/* _PyLong_AsByteArray: Convert the least-significant 8*n bits of long
97 v to a base-256 integer, stored in array bytes. Normally return 0,
98 return -1 on error.
99 If little_endian is 1/true, store the MSB at bytes[n-1] and the LSB at
100 bytes[0]; else (little_endian is 0/false) store the MSB at bytes[0] and
101 the LSB at bytes[n-1].
102 If is_signed is 0/false, it's an error if v < 0; else (v >= 0) n bytes
103 are filled and there's nothing special about bit 0x80 of the MSB.
104 If is_signed is 1/true, bytes is filled with the 2's-complement
105 representation of v's value. Bit 0x80 of the MSB is the sign bit.
106 Error returns (-1):
107 + is_signed is 0 and v < 0. TypeError is set in this case, and bytes
108 isn't altered.
109 + n isn't big enough to hold the full mathematical value of v. For
110 example, if is_signed is 0 and there are more digits in the v than
111 fit in n; or if is_signed is 1, v < 0, and n is just 1 bit shy of
112 being large enough to hold a sign bit. OverflowError is set in this
113 case, but bytes holds the least-signficant n bytes of the true value.
114*/
115PyAPI_FUNC(int) _PyLong_AsByteArray(PyLongObject* v,
116 unsigned char* bytes, size_t n,
117 int little_endian, int is_signed);
118
119/* _PyLong_Format: Convert the long to a string object with given base,
120 appending a base prefix of 0[box] if base is 2, 8 or 16.
121 Add a trailing "L" if addL is non-zero.
122 If newstyle is zero, then use the pre-2.6 behavior of octal having
123 a leading "0", instead of the prefix "0o" */
124PyAPI_FUNC(PyObject *) _PyLong_Format(PyObject *aa, int base, int addL, int newstyle);
125
126/* Format the object based on the format_spec, as defined in PEP 3101
127 (Advanced String Formatting). */
128PyAPI_FUNC(PyObject *) _PyLong_FormatAdvanced(PyObject *obj,
129 char *format_spec,
130 Py_ssize_t format_spec_len);
131
132#ifdef __cplusplus
133}
134#endif
135#endif /* !Py_LONGOBJECT_H */
136