Returning a byte buffer from C extension

[forwardshortleg@gmail.com]

Hello,

I am new to Python programming. So, kindly excuse me if I don't use
correct terminology here below.

I am trying to write an extension function that returns an array of
bytes as shown in the example below:


static PyObject* GetByteBuffer(P yObject* self, PyObject* args)
{
char byteBuffer[100];

// do something to fill byteBuffer with values.

return Py_BuildValue(" y", byteBuffer);
}


Is this valid? I get a run time error in Python 2.5 (actually 2.6) and
Python 3.0 returns null terminated byte string.
My byte buffer may contain one or more zeros and I want is the entire
buffer regardless of its contents. How do I do it?

Thanks,

Eknath

P.S: I know that 2.6 & 3.0 are not meant for a newcomers like me.
Unfortunately 2.5.2 and older for windows are built using MSCVC 6.0
and they pose problems building extensions.

[forwardshortleg@gmail.com]

Re: Returning a byte buffer from C extension

I just realized that I could do this as follows:

static PyObject* GetByteBuffer(P yObject* self, PyObject* args)
{
char byteBuffer[100];

// do something to fill byteBuffer with values.

return Py_BuildValue(" s#", byteBuffer, numberOfBytesTo Return);

}

Sorry for the unnecessary distraction.

Eknath


On Mar 5, 4:42 pm, forwardshort... @gmail.com wrote:

Hello,
>
I am new to Python programming. So, kindly excuse me if I don't use
correct terminology here below.
>
I am trying to write an extension function that returns an array of
bytes as shown in the example below:
>
static PyObject* GetByteBuffer(P yObject* self, PyObject* args)
{
char byteBuffer[100];
>
// do something to fill byteBuffer with values.
>
return Py_BuildValue(" y", byteBuffer);
>
}
>
Is this valid? I get a run time error in Python 2.5 (actually 2.6) and
Python 3.0 returns null terminated byte string.
My byte buffer may contain one or more zeros and I want is the entire
buffer regardless of its contents. How do I do it?
>
Thanks,
>
Eknath
>
P.S: I know that 2.6 & 3.0 are not meant for a newcomers like me.
Unfortunately 2.5.2 and older for windows are built using MSCVC 6.0
and they pose problems building extensions.