[pywin32-checkins] pywin32/win32/src _win32sysloader.cpp,NONE,1.1

[Mark H. <mha...@us...>]

Update of /cvsroot/pywin32/pywin32/win32/src
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv2524/win32/src

Added Files:
	_win32sysloader.cpp 
Log Message:
Give up on trying to safely import pywintypesXX.dll without help from an
extension - so we have a new _win32sysloader.cpp which only claim to fame
is that it does not link to pywintypes.dll.

This prevents errors seen in Zope, when an (existing) pywintypesXX.dll
lives in system32, and Zope installs its own next to its python.exe.  In
this case, importing (eg) win32api before pywintypes would cause bizarre 
type errors as the module was loaded twice.


--- NEW FILE: _win32sysloader.cpp ---
/***********************************************************************

_win32sysloader.cpp -- a helper module for loading the
PyWin32 "system" modules pywintypes and pythoncom.

Note that this module does (and must) *NOT* link to pywintypesXX.dll

See pywintypes.py for more information.

********************************************************************/
#include "windows.h"
#include "Python.h"

// GetModuleHandle and GetModuleFilename rolled into 1
static PyObject *PyGetModuleFilename(PyObject *self, PyObject *args)
{
    char *modName;
    if (!PyArg_ParseTuple(args, "s", &modName))
        return NULL;
    HINSTANCE hinst = GetModuleHandle(modName);
    if (hinst == NULL) {
        Py_INCREF(Py_None);
        return Py_None;
    }
    char buf[_MAX_PATH];
    if (GetModuleFileName(hinst, buf, sizeof(buf))==0) {
        Py_INCREF(Py_None);
        return Py_None;
    }
    return PyString_FromString(buf);
}

static PyObject *PyLoadModule(PyObject *self, PyObject *args)
{
    char *modName;
    if (!PyArg_ParseTuple(args, "s", &modName))
        return NULL;
    HINSTANCE hinst = LoadLibrary(modName);
    if (hinst == NULL) {
        Py_INCREF(Py_None);
        return Py_None;
    }
    char buf[_MAX_PATH];
    if (GetModuleFileName(hinst, buf, sizeof(buf))==0) {
        Py_INCREF(Py_None);
        return Py_None;
    }
    return PyString_FromString(buf);
}

static struct PyMethodDef functions[] = {
    {"GetModuleFilename",   PyGetModuleFilename,1},
    {"LoadModule",          PyLoadModule,1},
    { NULL }
};

extern "C" __declspec(dllexport) void
init_win32sysloader(void)
{
    Py_InitModule("_win32sysloader", functions);
}