mirror of https://github.com/python/cpython
229 lines
8.8 KiB
C
229 lines
8.8 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(Py_TYPE(op), Py_TPFLAGS_LONG_SUBCLASS)
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#define PyLong_CheckExact(op) (Py_TYPE(op) == &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(long) PyLong_AsLongAndOverflow(PyObject *, int *);
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PyAPI_FUNC(Py_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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#ifndef Py_LIMITED_API
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PyAPI_FUNC(int) _PyLong_AsInt(PyObject *);
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#endif
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PyAPI_FUNC(PyObject *) PyLong_GetInfo(void);
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/* It may be useful in the future. I've added it in the PyInt -> PyLong
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cleanup to keep the extra information. [CH] */
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#define PyLong_AS_LONG(op) PyLong_AsLong(op)
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/* Issue #1983: pid_t can be longer than a C long on some systems */
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#if !defined(SIZEOF_PID_T) || SIZEOF_PID_T == SIZEOF_INT
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#define _Py_PARSE_PID "i"
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#define PyLong_FromPid PyLong_FromLong
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#define PyLong_AsPid PyLong_AsLong
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#elif SIZEOF_PID_T == SIZEOF_LONG
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#define _Py_PARSE_PID "l"
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#define PyLong_FromPid PyLong_FromLong
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#define PyLong_AsPid PyLong_AsLong
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#elif defined(SIZEOF_LONG_LONG) && SIZEOF_PID_T == SIZEOF_LONG_LONG
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#define _Py_PARSE_PID "L"
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#define PyLong_FromPid PyLong_FromLongLong
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#define PyLong_AsPid PyLong_AsLongLong
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#else
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#error "sizeof(pid_t) is neither sizeof(int), sizeof(long) or sizeof(long long)"
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#endif /* SIZEOF_PID_T */
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#if SIZEOF_VOID_P == SIZEOF_INT
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# define _Py_PARSE_INTPTR "i"
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# define _Py_PARSE_UINTPTR "I"
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#elif SIZEOF_VOID_P == SIZEOF_LONG
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# define _Py_PARSE_INTPTR "l"
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# define _Py_PARSE_UINTPTR "k"
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#elif defined(SIZEOF_LONG_LONG) && SIZEOF_VOID_P == SIZEOF_LONG_LONG
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# define _Py_PARSE_INTPTR "L"
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# define _Py_PARSE_UINTPTR "K"
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#else
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# error "void* different in size from int, long and long long"
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#endif /* SIZEOF_VOID_P */
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#ifndef Py_LIMITED_API
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PyAPI_FUNC(int) _PyLong_UnsignedShort_Converter(PyObject *, void *);
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PyAPI_FUNC(int) _PyLong_UnsignedInt_Converter(PyObject *, void *);
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PyAPI_FUNC(int) _PyLong_UnsignedLong_Converter(PyObject *, void *);
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PyAPI_FUNC(int) _PyLong_UnsignedLongLong_Converter(PyObject *, void *);
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PyAPI_FUNC(int) _PyLong_Size_t_Converter(PyObject *, void *);
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#endif
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/* Used by Python/mystrtoul.c, _PyBytes_FromHex(),
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_PyBytes_DecodeEscapeRecode(), etc. */
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#ifndef Py_LIMITED_API
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PyAPI_DATA(unsigned char) _PyLong_DigitValue[256];
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#endif
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/* _PyLong_Frexp returns a double x and an exponent e such that the
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true value is approximately equal to x * 2**e. e is >= 0. x is
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0.0 if and only if the input is 0 (in which case, e and x are both
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zeroes); otherwise, 0.5 <= abs(x) < 1.0. On overflow, which is
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possible if the number of bits doesn't fit into a Py_ssize_t, sets
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OverflowError and returns -1.0 for x, 0 for e. */
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#ifndef Py_LIMITED_API
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PyAPI_FUNC(double) _PyLong_Frexp(PyLongObject *a, Py_ssize_t *e);
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#endif
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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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PyAPI_FUNC(PyObject *) PyLong_FromLongLong(long long);
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PyAPI_FUNC(PyObject *) PyLong_FromUnsignedLongLong(unsigned long long);
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PyAPI_FUNC(long long) PyLong_AsLongLong(PyObject *);
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PyAPI_FUNC(unsigned long long) PyLong_AsUnsignedLongLong(PyObject *);
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PyAPI_FUNC(unsigned long long) PyLong_AsUnsignedLongLongMask(PyObject *);
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PyAPI_FUNC(long long) PyLong_AsLongLongAndOverflow(PyObject *, int *);
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PyAPI_FUNC(PyObject *) PyLong_FromString(const char *, char **, int);
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#ifndef Py_LIMITED_API
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PyAPI_FUNC(PyObject *) PyLong_FromUnicode(Py_UNICODE*, Py_ssize_t, int) Py_DEPRECATED(3.3);
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PyAPI_FUNC(PyObject *) PyLong_FromUnicodeObject(PyObject *u, int base);
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PyAPI_FUNC(PyObject *) _PyLong_FromBytes(const char *, Py_ssize_t, int);
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#endif
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#ifndef Py_LIMITED_API
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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_DivmodNear. Given integers a and b, compute the nearest
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integer q to the exact quotient a / b, rounding to the nearest even integer
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in the case of a tie. Return (q, r), where r = a - q*b. The remainder r
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will satisfy abs(r) <= abs(b)/2, with equality possible only if q is
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even.
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*/
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PyAPI_FUNC(PyObject *) _PyLong_DivmodNear(PyObject *, PyObject *);
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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 int 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 int.
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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-significant 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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/* _PyLong_FromNbInt: Convert the given object to a PyLongObject
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using the nb_int slot, if available. Raise TypeError if either the
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nb_int slot is not available or the result of the call to nb_int
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returns something not of type int.
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*/
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PyAPI_FUNC(PyLongObject *)_PyLong_FromNbInt(PyObject *);
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/* _PyLong_Format: Convert the long to a string object with given base,
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appending a base prefix of 0[box] if base is 2, 8 or 16. */
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PyAPI_FUNC(PyObject *) _PyLong_Format(PyObject *obj, int base);
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PyAPI_FUNC(int) _PyLong_FormatWriter(
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_PyUnicodeWriter *writer,
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PyObject *obj,
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int base,
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int alternate);
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PyAPI_FUNC(char*) _PyLong_FormatBytesWriter(
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_PyBytesWriter *writer,
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char *str,
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PyObject *obj,
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int base,
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int alternate);
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/* Format the object based on the format_spec, as defined in PEP 3101
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(Advanced String Formatting). */
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PyAPI_FUNC(int) _PyLong_FormatAdvancedWriter(
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_PyUnicodeWriter *writer,
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PyObject *obj,
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PyObject *format_spec,
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Py_ssize_t start,
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Py_ssize_t end);
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#endif /* Py_LIMITED_API */
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/* These aren't really part of the int object, but they're handy. The
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functions are in Python/mystrtoul.c.
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*/
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PyAPI_FUNC(unsigned long) PyOS_strtoul(const char *, char **, int);
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PyAPI_FUNC(long) PyOS_strtol(const char *, char **, int);
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#ifndef Py_LIMITED_API
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/* For use by the gcd function in mathmodule.c */
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PyAPI_FUNC(PyObject *) _PyLong_GCD(PyObject *, PyObject *);
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#endif /* !Py_LIMITED_API */
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#ifndef Py_LIMITED_API
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PyAPI_DATA(PyObject *) _PyLong_Zero;
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PyAPI_DATA(PyObject *) _PyLong_One;
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#endif
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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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