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gh-106320: Re-add some PyLong/PyDict C-API functions (GH-#111162)

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* gh-106320: Re-add _PyLong_FromByteArray(), _PyLong_AsByteArray() and _PyLong_GCD() to the public header files since they are used by third-party packages and there is no efficient replacement.

See https://github.com/python/cpython/issues/111140
See https://github.com/python/cpython/issues/111139

* gh-111262: Re-add _PyDict_Pop() to have a C-API until a new public one is designed.
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scoder 2023-10-25 11:33:48 +02:00 • committed by GitHub
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46
Include/internal/pycore_long.h
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@ -128,57 +128,11 @@ extern PyObject* _PyLong_FromBytes(const char *, Py_ssize_t, int);
// Export for '_datetime' shared extension.
PyAPI_DATA(PyObject*) _PyLong_DivmodNear(PyObject *, PyObject *);
// _PyLong_FromByteArray: View the n unsigned bytes as a binary integer in
// base 256, and return a Python int 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 int.
//
// Export for '_multibytecodec' shared extension.
PyAPI_DATA(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-significant n bytes of the true value.
//
// Export for '_struct' shared extension.
PyAPI_DATA(int) _PyLong_AsByteArray(PyLongObject* v,
unsigned char* bytes, size_t n,
int little_endian, int is_signed);
// _PyLong_Format: Convert the long to a string object with given base,
// appending a base prefix of 0[box] if base is 2, 8 or 16.
// Export for '_tkinter' shared extension.
PyAPI_DATA(PyObject*) _PyLong_Format(PyObject *obj, int base);
// For use by the math.gcd() function.
// Export for 'math' shared extension.
PyAPI_DATA(PyObject*) _PyLong_GCD(PyObject *, PyObject *);
// Export for 'math' shared extension
PyAPI_DATA(PyObject*) _PyLong_Rshift(PyObject *, size_t);