PATCH: reverse return from CDROM_Verify

[Alex Pasadyn <ajp@mail.utexas.edu>]

The function CDROM_Verify seems to be returning the opposite of what is 
expected.  Along with the trivial patch I have attached a test program 
that simply prints out whether or not a disc is in the drive.  CVS Wine 
is giving the opposite answer from Win2000.  (Note that this API is not 
supported on Win9x.)

Alex Pasadyn
ajp@mail.utexas.edu

ChangeLog:
- Fix return from IOCTL_CDROM_CHECK_VERIFY




Index: dlls/ntdll/cdrom.c
===================================================================
RCS file: /home/wine/wine/dlls/ntdll/cdrom.c,v
retrieving revision 1.20
diff -u -r1.20 cdrom.c
--- dlls/ntdll/cdrom.c	13 Sep 2002 21:42:28 -0000	1.20
+++ dlls/ntdll/cdrom.c	12 Dec 2002 02:36:31 -0000
@@ -759,7 +759,7 @@
     SUB_Q_CHANNEL_DATA          data;
 
     fmt.Format = IOCTL_CDROM_CURRENT_POSITION;
-    return CDROM_ReadQChannel(dev, &fmt, &data) ? 0 : 1;
+    return CDROM_ReadQChannel(dev, &fmt, &data) ? 1 : 0;
 }
 
 /******************************************************************
// TestCdromVerify.cpp
// To compile with MSVC: CL TestCdromVerify.cpp

#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <stdio.h>
#include <winioctl.h>

int main (int argc, char **argv) {

    HANDLE hDevice;
    BOOL bPresent = false;
    DWORD dwOutput;
    char sDriveString[10];

    if (argc<2 || strlen(argv[1])>1) {
        printf("Call is\n%s x\nwhere x is the drive letter for the cdrom\n", argv[0]);
        return 1;
    }
    sprintf(sDriveString,"\\\\.\\%s:",argv[1]);

    hDevice = CreateFile(sDriveString, GENERIC_READ, FILE_SHARE_READ,
                         0, OPEN_EXISTING, 0, 0);
    
    if (hDevice != INVALID_HANDLE_VALUE) {
        bPresent = DeviceIoControl(hDevice, IOCTL_STORAGE_CHECK_VERIFY,
                                   NULL, 0, NULL, 0, &dwOutput, NULL);
        if (bPresent) {
            printf("a CD is present in the drive\n");
        } else {
            printf("there is nothing in the drive or an error was encountered\n");
        }
    } else {
        printf("error accessing drive");
    }
    CloseHandle(hDevice);

    return 0;
}