src/java.prefs/windows/native/libprefs/WindowsPreferences.c
author phh
Sat, 30 Nov 2019 14:33:05 -0800
changeset 59330 5b96c12f909d
parent 50471 f0aeede1b855
permissions -rw-r--r--
8234541: C1 emits an empty message when it inlines successfully Summary: Use "inline" as the message when successfull Reviewed-by: thartmann, mdoerr Contributed-by: navy.xliu@gmail.com
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/*
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 * Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.  Oracle designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Oracle in the LICENSE file that accompanied this code.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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#include <stdlib.h>
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#include <windows.h>
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#include "jni.h"
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#include "jni_util.h"
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#include "jvm.h"
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#include "java_util_prefs_WindowsPreferences.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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 * Declare library specific JNI_Onload entry if static build
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 */
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DEF_STATIC_JNI_OnLoad
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JNIEXPORT jlongArray JNICALL
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Java_java_util_prefs_WindowsPreferences_WindowsRegOpenKey(JNIEnv* env,
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    jclass this_class, jlong hKey, jbyteArray lpSubKey, jint securityMask) {
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    char* str = (*env)->GetByteArrayElements(env, lpSubKey, NULL);
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    CHECK_NULL_RETURN(str, NULL);
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    HKEY handle;
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    int errorCode = RegOpenKeyEx((HKEY) hKey, str, 0, securityMask, &handle);
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    (*env)->ReleaseByteArrayElements(env, lpSubKey, str, 0);
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    jlong tmp[2];
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    tmp[0] = (jlong) handle;
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    tmp[1] = errorCode;
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    jlongArray result = (*env)->NewLongArray(env, 2);
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    if (result != NULL) {
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        (*env)->SetLongArrayRegion(env, result, 0, 2, tmp);
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    }
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    return result;
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}
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JNIEXPORT jint JNICALL
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Java_java_util_prefs_WindowsPreferences_WindowsRegCloseKey(JNIEnv* env,
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    jclass this_class, jlong hKey) {
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    return (jint) RegCloseKey((HKEY) hKey);
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};
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JNIEXPORT jlongArray JNICALL
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Java_java_util_prefs_WindowsPreferences_WindowsRegCreateKeyEx(JNIEnv* env,
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    jclass this_class, jlong hKey, jbyteArray lpSubKey) {
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    char* str = (*env)->GetByteArrayElements(env, lpSubKey, NULL);
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    CHECK_NULL_RETURN(str, NULL);
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    HKEY handle;
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    DWORD lpdwDisposition;
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    int errorCode = RegCreateKeyEx((HKEY) hKey, str, 0, NULL,
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        REG_OPTION_NON_VOLATILE, KEY_READ,
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        NULL, &handle, &lpdwDisposition);
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    (*env)->ReleaseByteArrayElements(env, lpSubKey, str, 0);
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    jlong tmp[3];
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    tmp[0] = (jlong) handle;
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    tmp[1] = errorCode;
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    tmp[2] = lpdwDisposition;
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    jlongArray result = (*env)->NewLongArray(env, 3);
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    if (result != NULL) {
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        (*env)->SetLongArrayRegion(env, result, 0, 3, tmp);
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    }
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    return result;
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}
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JNIEXPORT jint JNICALL
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Java_java_util_prefs_WindowsPreferences_WindowsRegDeleteKey(JNIEnv* env,
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    jclass this_class, jlong hKey, jbyteArray lpSubKey) {
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    char* str = (*env)->GetByteArrayElements(env, lpSubKey, NULL);
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    CHECK_NULL_RETURN(str, -1);
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    int result = RegDeleteKey((HKEY) hKey, str);
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    (*env)->ReleaseByteArrayElements(env, lpSubKey, str, 0);
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    return result;
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};
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JNIEXPORT jint JNICALL
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Java_java_util_prefs_WindowsPreferences_WindowsRegFlushKey(JNIEnv* env,
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    jclass this_class, jlong hKey) {
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    return RegFlushKey((HKEY) hKey);
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}
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JNIEXPORT jbyteArray JNICALL
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Java_java_util_prefs_WindowsPreferences_WindowsRegQueryValueEx(JNIEnv* env,
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    jclass this_class, jlong hKey, jbyteArray valueName) {
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    char* valueNameStr = (*env)->GetByteArrayElements(env, valueName, NULL);
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    CHECK_NULL_RETURN(valueNameStr, NULL);
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    DWORD valueType;
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    DWORD valueSize;
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    if (RegQueryValueEx((HKEY) hKey, valueNameStr, NULL, &valueType, NULL,
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        &valueSize) != ERROR_SUCCESS) {
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        (*env)->ReleaseByteArrayElements(env, valueName, valueNameStr, 0);
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        return NULL;
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    }
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    char* buffer = (char*) malloc(valueSize);
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    if (buffer != NULL) {
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        if (RegQueryValueEx((HKEY) hKey, valueNameStr, NULL, &valueType, buffer,
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            &valueSize) != ERROR_SUCCESS) {
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            free(buffer);
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            (*env)->ReleaseByteArrayElements(env, valueName, valueNameStr, 0);
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            return NULL;
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        }
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    } else {
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        JNU_ThrowOutOfMemoryError(env, "native memory allocation failed");
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        (*env)->ReleaseByteArrayElements(env, valueName, valueNameStr, 0);
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        return NULL;
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    }
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    jbyteArray result;
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    if (valueType == REG_SZ) {
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        result = (*env)->NewByteArray(env, valueSize);
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        if (result != NULL) {
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            (*env)->SetByteArrayRegion(env, result, 0, valueSize, buffer);
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        }
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    } else {
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        result = NULL;
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    }
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    free(buffer);
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    (*env)->ReleaseByteArrayElements(env, valueName, valueNameStr, 0);
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    return result;
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}
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JNIEXPORT jint JNICALL
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Java_java_util_prefs_WindowsPreferences_WindowsRegSetValueEx(JNIEnv* env,
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    jclass this_class, jlong hKey, jbyteArray valueName, jbyteArray data) {
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    if ((valueName == NULL) || (data == NULL)) {
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        return -1;
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    }
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    int size = (*env)->GetArrayLength(env, data);
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    char* dataStr = (*env)->GetByteArrayElements(env, data, NULL);
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    CHECK_NULL_RETURN(dataStr, -1);
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    char* valueNameStr = (*env)->GetByteArrayElements(env, valueName, NULL);
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    int error_code = -1;
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    if (valueNameStr != NULL) {
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        error_code = RegSetValueEx((HKEY) hKey, valueNameStr, 0,
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            REG_SZ, dataStr, size);
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        (*env)->ReleaseByteArrayElements(env, valueName, valueNameStr, 0);
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    }
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    (*env)->ReleaseByteArrayElements(env, data, dataStr, 0);
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    return error_code;
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}
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JNIEXPORT jint JNICALL
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Java_java_util_prefs_WindowsPreferences_WindowsRegDeleteValue(JNIEnv* env,
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    jclass this_class, jlong hKey, jbyteArray valueName) {
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    if (valueName == NULL) {
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        return -1;
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    }
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    char* valueNameStr = (*env)->GetByteArrayElements(env, valueName, NULL);
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    CHECK_NULL_RETURN(valueNameStr, -1);
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    int error_code = RegDeleteValue((HKEY) hKey, valueNameStr);
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    (*env)->ReleaseByteArrayElements(env, valueName, valueNameStr, 0);
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    return error_code;
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}
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JNIEXPORT jlongArray JNICALL
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Java_java_util_prefs_WindowsPreferences_WindowsRegQueryInfoKey(JNIEnv* env,
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    jclass this_class, jlong hKey) {
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    int subKeysNumber;
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    int maxSubKeyLength;
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    int valuesNumber;
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    int maxValueNameLength;
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    int errorCode = RegQueryInfoKey((HKEY) hKey, NULL, NULL, NULL,
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        &subKeysNumber, &maxSubKeyLength, NULL,
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        &valuesNumber, &maxValueNameLength,
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        NULL, NULL, NULL);
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    jlong tmp[5];
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    tmp[0] = subKeysNumber;
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    tmp[1] = errorCode;
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    tmp[2] = valuesNumber;
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    tmp[3] = maxSubKeyLength;
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    tmp[4] = maxValueNameLength;
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    jintArray result = (*env)->NewLongArray(env, 5);
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    if (result != NULL) {
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        (*env)->SetLongArrayRegion(env, result, 0, 5, tmp);
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    }
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    return result;
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}
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JNIEXPORT jbyteArray JNICALL
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Java_java_util_prefs_WindowsPreferences_WindowsRegEnumKeyEx(JNIEnv* env,
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    jclass this_class, jlong hKey, jint subKeyIndex, jint maxKeyLength) {
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    int size = maxKeyLength;
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    char* buffer = (char*) malloc(maxKeyLength);
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    if (buffer == NULL) {
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        JNU_ThrowOutOfMemoryError(env, "native memory allocation failed");
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        return NULL;
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    }
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    if (RegEnumKeyEx((HKEY) hKey, subKeyIndex, buffer, &size, NULL, NULL,
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        NULL, NULL) != ERROR_SUCCESS) {
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        free(buffer);
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        return NULL;
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    }
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    jbyteArray result = (*env)->NewByteArray(env, size + 1);
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    if (result != NULL) {
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        (*env)->SetByteArrayRegion(env, result, 0, size + 1, buffer);
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    }
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    free(buffer);
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    return result;
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}
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JNIEXPORT jbyteArray JNICALL
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Java_java_util_prefs_WindowsPreferences_WindowsRegEnumValue(JNIEnv* env,
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    jclass this_class, jlong hKey, jint valueIndex, jint maxValueNameLength) {
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    int size = maxValueNameLength;
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    char* buffer = (char*) malloc(maxValueNameLength);
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    if (buffer == NULL) {
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        JNU_ThrowOutOfMemoryError(env, "native memory allocation failed");
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        return NULL;
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    }
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    int error_code = RegEnumValue((HKEY) hKey, valueIndex, buffer,
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        &size, NULL, NULL, NULL, NULL);
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    if (error_code != ERROR_SUCCESS) {
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        free(buffer);
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        return NULL;
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    }
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    jbyteArray result = (*env)->NewByteArray(env, size + 1);
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    if (result != NULL) {
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        (*env)->SetByteArrayRegion(env, result, 0, size + 1, buffer);
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    }
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    free(buffer);
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    return result;
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}
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#ifdef __cplusplus
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}
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#endif