1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
// Parallel port extension for Win32
// "inp" and "outp" are used to access the parallelport hardware
// needs giveio.sys driver on NT/2k/XP
//
// (C) 2005 Chris Liechti <cliechti@gmx.net>
// this is distributed under a free software license, see license.txt
#include <windows.h>
#include <conio.h>
#define DRIVERNAME "\\\\.\\giveio"
/* module-functions */
WINAPI void outp(int port, int value) {
_outp(port, value);
}
WINAPI int inp(int port) {
int value;
value = _inp(port);
return value;
}
WINAPI int init(void) {
OSVERSIONINFO vi;
//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(DRIVERNAME, 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
//"Couldn't access giveio device";
return 1;
}
//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
}
return 0;
}
|
