Mapping 64 bit int from C to Python-2.2

[Explore_Imagination]

Hi

I want to map 64 bit integers from C to python. I must use Python 2.2
BUT There is no support for 64 bits integers in Python2.2 (Supported
in 2.5).

Now the problem is that I have these four variables:

unit32_t a,b,c;
uint64_t w,x,y,z;

I use this funtion to map values:

Py_BuildValue( "(lllllll)", a,b,c,w,x,y,z );

As I access 32 bit values in Python it works fine BUT 64 bit intergers
in Pythong give garbage values . I think there may be a case of
overflow when 64 bit values in C are mapped to python.

Any Suggestions?

 

[MRAB]

Hi

I want to map 64 bit integers from C to python. I must use Python 2.2
BUT There is no support for 64 bits integers in Python2.2 (Supported
in 2.5).

Now the problem is that I have these four variables:

unit32_t a,b,c;
uint64_t w,x,y,z;

I use this funtion to map values:

Py_BuildValue( "(lllllll)", a,b,c,w,x,y,z );

As I access 32 bit values in Python it works fine BUT 64 bit intergers
in Pythong give garbage values . I think there may be a case of
overflow when 64 bit values in C are mapped to python.

Any Suggestions?

Split the 64-bit values into 2 x 32-bit values?

 

[pruebauno]

Hi

I want to map 64 bit integers from C to python. I must use Python 2.2
BUT There is no support for 64 bits integers in Python2.2 (Supported
in 2.5).

Now the problem is that I have these four variables:

unit32_t a,b,c;
uint64_t w,x,y,z;

I use this funtion to map values:

Py_BuildValue( "(lllllll)", a,b,c,w,x,y,z );

As I access 32 bit values in Python it works fine BUT 64 bit intergers
in Pythong give garbage values . I think there may be a case of
overflow when 64 bit values in C are mapped to python.

Any Suggestions?

You should be able to create PyLong objects from your 64 bit integers.
PyLong objects have unlimited integer precision. Alas I don't know
enough about the internal C code of Python to know what function to
use to do the conversion from an int64 to a PyLong object.

 

[Gabriel Genellina]

En Mon, 09 Mar 2009 13:51:59 -0200, Explore_Imagination

I want to map 64 bit integers from C to python. I must use Python 2.2
BUT There is no support for 64 bits integers in Python2.2 (Supported
in 2.5).

Now the problem is that I have these four variables:

unit32_t a,b,c;
uint64_t w,x,y,z;

I use this funtion to map values:

Py_BuildValue( "(lllllll)", a,b,c,w,x,y,z );

As I access 32 bit values in Python it works fine BUT 64 bit intergers
in Pythong give garbage values . I think there may be a case of
overflow when 64 bit values in C are mapped to python.

You'll have to use a Python long integer. Try PyLong_FromLongLong (I don't
know if it exists in 2.2)

 

[Explore_Imagination]

Split the 64-bit values into 2 x 32-bit values?

I have tried by splitting 64-bit values but still it doesn't make any
difference

 

[Explore_Imagination]

Split the 64-bit values into 2 x 32-bit values?

I have tried by splitting 64-bit values but still it doesn't make any
difference

 

[Explore_Imagination]

Split the 64-bit values into 2 x 32-bit values?

I have tried by splitting 64-bit values but still it doesn't make any
difference

 

[Mark Hammond]

Hi

I want to map 64 bit integers from C to python. I must use Python 2.2
BUT There is no support for 64 bits integers in Python2.2 (Supported
in 2.5).

Now the problem is that I have these four variables:

unit32_t a,b,c;
uint64_t w,x,y,z;

I use this funtion to map values:

Py_BuildValue( "(lllllll)", a,b,c,w,x,y,z );

As I access 32 bit values in Python it works fine BUT 64 bit intergers
in Pythong give garbage values . I think there may be a case of
overflow when 64 bit values in C are mapped to python.

Any Suggestions?

pywin32 had this requirement, and although support was recently removed,
if you look at:

http://pywin32.cvs.sourceforge.net/...PyLARGE_INTEGER.cpp?revision=1.11&view=markup

you should find routines that work without 'longlong' support in Python
itself.

Cheers,

Mark