You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
109 lines
4.6 KiB
109 lines
4.6 KiB
#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 */
|
|
|