1 files changed, 91 insertions, 0 deletions
diff --git a/pyparallel/src/win32/_pyparallel.c b/pyparallel/src/win32/_pyparallel.c
new file mode 100644
index 0000000..7f906c5
--- /dev/null
+++ b/pyparallel/src/win32/_pyparallel.c
@@ -0,0 +1,91 @@
+// Parallel port extension for Win32
+// "inp" and "outp" are used to access the parallelport hardware
+// needs giveio.sys driver on NT/2k/XP
+//
+// (C) 2002 Chris Liechti <cliechti@gmx.net>
+// this is distributed under a free software license, see license.txt
+
+#include <Python.h>
+#include <windows.h>
+#include <conio.h>
+#include "loaddrv.h"
+
+#define DRIVERNAME      "giveio.sys"
+#define SERVICENAME     "giveio"
+
+/* module-functions */
+
+static PyObject*
+py_outp(PyObject *self, PyObject *args)
+{
+    int port, value;
+    if(!PyArg_ParseTuple(args, "ii", &port, &value))
+        return 0;
+    _outp(port, value);
+    Py_INCREF(Py_None);
+    return Py_None;
+}
+
+static PyObject*
+py_inp(PyObject *self, PyObject *args)
+{
+    int port, value;
+    if(!PyArg_ParseTuple(args, "i", &port))
+        return 0;
+    value = _inp(port);
+    return Py_BuildValue("i", value);
+}
+
+
+
+static PyMethodDef pypar_methods[] = {
+    {"outp",   py_outp,   METH_VARARGS},
+    {"inp",    py_inp,    METH_VARARGS},
+    {0, 0}
+};
+
+/* module entry-point (module-initialization) function */
+void init_pyparallel(void) {
+    int dwStatus;
+    //~ char buf[256];
+    OSVERSIONINFO vi;
+    
+    /* Create the module and add the functions */
+    PyObject *m = Py_InitModule("_pyparallel", pypar_methods);
+    
+    //detect OS, on NT,2k,XP the driver needs to be loaded
+    vi.dwOSVersionInfoSize = sizeof(vi);
+    GetVersionEx(&vi);
+    if (vi.dwPlatformId == VER_PLATFORM_WIN32_NT) {
+        HANDLE h;
+        //try to open driver
+        h = CreateFile("\\\\.\\giveio", GENERIC_READ, 0, NULL,
+                        OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
+        if (h == INVALID_HANDLE_VALUE) {
+            //failed, try to load sys file fom disk
+            dwStatus = LoadDriverInit();        //init loaddriver module
+            //~ printf("init %d\n", dwStatus);
+            //driver not running, try to start it
+            //~ dwStatus = getcwd(buf, sizeof buf);
+            //~ snprintf(buf, sizeof buf, "%s\\%s", buf, SERVICENAME);
+            //~ printf("path %d %s %s\n", dwStatus, buf, SERVICENAME);
+            //~ dwStatus = DriverInstall(buf, SERVICENAME);
+            //install the driver. this returns an error if already installed
+            //but who cares?
+            dwStatus = DriverInstall(DRIVERNAME, SERVICENAME);
+            dwStatus = DriverStart(SERVICENAME);//now start the driver
+            LoadDriverCleanup();                //close loaddriver module
+            //retry to open the file
+            h = CreateFile("\\\\.\\giveio", GENERIC_READ, 0, NULL,
+                            OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
+            if (h == INVALID_HANDLE_VALUE) {
+                //if it fails again, then we have a problem... -> exception
+                PyErr_Format(PyExc_ImportError, "Couldn't access giveio device");
+            }
+        }
+        //close again immediately.
+        //the process is now tagged to have the rights it needs,
+        //the giveio driver remembers that
+        if (h != NULL) CloseHandle(h);          //close the driver's file
+    }
+}