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svn+ssh://pythondev@svn.python.org/python/trunk ........ r53899 | neal.norwitz | 2007-02-25 16:52:27 +0100 (Sun, 25 Feb 2007) | 1 line Add more details when releasing interned strings ........ r53900 | neal.norwitz | 2007-02-25 16:53:36 +0100 (Sun, 25 Feb 2007) | 1 line Whitespace only changes ........ r53901 | jeremy.hylton | 2007-02-25 16:57:45 +0100 (Sun, 25 Feb 2007) | 8 lines Fix crash in exec when unicode filename can't be decoded. I can't think of an easy way to test this behavior. It only occurs when the file system default encoding and the interpreter default encoding are different, such that you can open the file but not decode its name. ........ r53902 | jeremy.hylton | 2007-02-25 17:01:58 +0100 (Sun, 25 Feb 2007) | 2 lines Put declarations before code. ........ r53910 | fred.drake | 2007-02-25 18:56:27 +0100 (Sun, 25 Feb 2007) | 3 lines - SF patch #1657613: add documentation for the Element interface - clean up bogus use of the {datadescni} environment everywhere ........ r53911 | neal.norwitz | 2007-02-25 20:44:48 +0100 (Sun, 25 Feb 2007) | 17 lines Variation of patch # 1624059 to speed up checking if an object is a subclass of some of the common builtin types. Use a bit in tp_flags for each common builtin type. Check the bit to determine if any instance is a subclass of these common types. The check avoids a function call and O(n) search of the base classes. The check is done in the various Py*_Check macros rather than calling PyType_IsSubtype(). All the bits are set in tp_flags when the type is declared in the Objects/*object.c files because PyType_Ready() is not called for all the types. Should PyType_Ready() be called for all types? If so and the change is made, the changes to the Objects/*object.c files can be reverted (remove setting the tp_flags). Objects/typeobject.c would also have to be modified to add conditions for Py*_CheckExact() in addition to each the PyType_IsSubtype check. ........
118 lines
4.8 KiB
C
118 lines
4.8 KiB
C
#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) \
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PyType_FastSubclass((op)->ob_type, Py_TPFLAGS_LONG_SUBCLASS)
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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_FromSize_t(size_t);
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PyAPI_FUNC(PyObject *) PyLong_FromSsize_t(Py_ssize_t);
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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(ssize_t) PyLong_AsSsize_t(PyObject *);
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PyAPI_FUNC(size_t) PyLong_AsSize_t(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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/* For use by intobject.c only */
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PyAPI_DATA(int) _PyLong_DigitValue[256];
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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(int) _PyLong_FitsInLong(PyObject* vv);
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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*, Py_ssize_t, 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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/* _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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