1 /*

     2  * Copyright 2008-2009 Sun Microsystems, Inc.  All Rights Reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Sun designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Sun in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any questions.

    24  */

    25 

    26 #include <windows.h>

    27 

    28 #include "jni.h"

    29 #include "jni_util.h"

    30 #include "jlong.h"

    31 

    32 #include "sun_nio_fs_RegistryFileTypeDetector.h"

    33 

    34 

    35 JNIEXPORT jstring JNICALL

    36 Java_sun_nio_fs_RegistryFileTypeDetector_queryStringValue(JNIEnv* env, jclass this,

    37     jlong keyAddress, jlong nameAddress)

    38 {

    39     LPCWSTR lpSubKey= (LPCWSTR)jlong_to_ptr(keyAddress);

    40     LPWSTR lpValueName = (LPWSTR)jlong_to_ptr(nameAddress);

    41     LONG res;

    42     HKEY hKey;

    43     jstring result = NULL;

    44 

    45     res = RegOpenKeyExW(HKEY_CLASSES_ROOT, lpSubKey, 0, KEY_READ, &hKey);

    46     if (res == ERROR_SUCCESS) {

    47         DWORD type;

    48         BYTE data[255];

    49         DWORD size = sizeof(data);

    50 

    51         res = RegQueryValueExW(hKey, lpValueName, NULL, &type, (LPBYTE)&data, &size);

    52         if (res == ERROR_SUCCESS) {

    53             if (type == REG_SZ) {

    54                 jsize len = wcslen((WCHAR*)data);

    55                 result = (*env)->NewString(env, (const jchar*)&data, len);

    56             }

    57         }

    58 

    59         RegCloseKey(hKey);

    60     }

    61     return result;

    62 }