JNIEXPORT jobjectArray JNICALL Java_org_netbeans_installer_utils_system_windows_WindowsRegistry_getSubkeyNames0()

in src/main/cpp/jnilib/windows/src/jni_WindowsRegistry.c [146:191]

• 38 lines of code
• 7 McCabe index (conditional complexity)

JNIEXPORT jobjectArray JNICALL Java_org_netbeans_installer_utils_system_windows_WindowsRegistry_getSubkeyNames0(JNIEnv *jEnv, jobject jObject, jint jMode, jint jSection, jstring jKey) {
    HKEY  hkey   = 0;
    unsigned short* key    = getWideChars(jEnv, jKey);
    DWORD number = 0;
    int   err    = 0;
    int   index  = 0 ;
    
    unsigned short* buffer = (unsigned short*) MALLOC(sizeof(char) * MAX_LEN_VALUE_NAME);
    
    jobjectArray result = NULL;
    if (RegOpenKeyExW(getHKEY(jSection), key, 0, KEY_READ | getMode(jMode), &hkey) == ERROR_SUCCESS) {
        if (RegQueryInfoKeyW(hkey, NULL, NULL, NULL, &number, NULL, NULL, NULL, NULL, NULL, NULL, NULL) == ERROR_SUCCESS) {
            jclass stringClazz = (*jEnv)->FindClass(jEnv, "java/lang/String");
            result = (*jEnv)->NewObjectArray(jEnv, number, stringClazz, NULL);
            
            do {
                DWORD size = MAX_LEN_VALUE_NAME;
                buffer[0]  = 0;
                
                err = RegEnumKeyExW(hkey, index, buffer, &size, NULL, NULL, NULL, NULL);
                if (err == ERROR_SUCCESS) {
                    (*jEnv)->SetObjectArrayElement(jEnv, result, index, getStringW(jEnv, buffer));
                } else {
                    if (err != ERROR_NO_MORE_ITEMS) {
                        throwException(jEnv, "Cannot get key names");
                    }
                }
                
                index++;
            } while (err == ERROR_SUCCESS);
        } else {
            throwException(jEnv, "Cannot read key data");
        }
    } else {
        throwException(jEnv, "Cannot open key");
    }
    
    if (hkey != 0) {
        RegCloseKey(hkey);
    }
    
    FREE(key);
    FREE(buffer);
    
    return result;
}