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      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #define LOG_TAG "UsbDeviceJNI"
     18 
     19 #include "utils/Log.h"
     20 
     21 #include "jni.h"
     22 #include "JNIHelp.h"
     23 #include "android_runtime/AndroidRuntime.h"
     24 
     25 #include <usbhost/usbhost.h>
     26 
     27 using namespace android;
     28 
     29 static jint
     30 android_hardware_UsbDevice_get_device_id(JNIEnv *env, jobject clazz, jstring name)
     31 {
     32     const char *nameStr = env->GetStringUTFChars(name, NULL);
     33     int id = usb_device_get_unique_id_from_name(nameStr);
     34     env->ReleaseStringUTFChars(name, nameStr);
     35     return id;
     36 }
     37 
     38 static jstring
     39 android_hardware_UsbDevice_get_device_name(JNIEnv *env, jobject clazz, jint id)
     40 {
     41     char* name = usb_device_get_name_from_unique_id(id);
     42     jstring result = env->NewStringUTF(name);
     43     free(name);
     44     return result;
     45 }
     46 
     47 static JNINativeMethod method_table[] = {
     48     // static methods
     49     { "native_get_device_id", "(Ljava/lang/String;)I",
     50                                         (void*)android_hardware_UsbDevice_get_device_id },
     51     { "native_get_device_name", "(I)Ljava/lang/String;",
     52                                         (void*)android_hardware_UsbDevice_get_device_name },
     53 };
     54 
     55 int register_android_hardware_UsbDevice(JNIEnv *env)
     56 {
     57     return AndroidRuntime::registerNativeMethods(env, "android/hardware/usb/UsbDevice",
     58             method_table, NELEM(method_table));
     59 }
     60