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