Large integers from C

[Phil Mayers]

In article <c76ff6fc.0202201519.509ec73e at posting.google.com>, "John
Machin" <sjmachin at lexicon.net> wrote:

> Gustavo Niemeyer <niemeyer at conectiva.com> wrote in message
> 
> It is possible that the OP wants, but is not looking very hard for,
> this:
> 
> [from Python 2.2 source, in include/longobject.h] """
> /* _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.
> */
> extern DL_IMPORT(PyObject *) _PyLong_FromByteArray(
>         const unsigned char* bytes, size_t n, int little_endian, int
>         is_signed);
> """

Ah, I should probably point out I am restricted to using Python 1.5.2 for
various dull reasons, but in theory that is what I'm looking for.
However, I note that API isn't listed in the C API documentation.

I'll probably try the PyLong_FromString, and see if that helps.

Cheers,
Phil