42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
|
/*
|
||
|
|
* Copyright (C) 2022 The Android Open Source Project
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <usbhost/usbhost_jni.h>
|
||
|
|
|
||
|
|
#include "usbhost_private.h"
|
||
|
|
|
||
|
|
#include <errno.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
|
||
|
|
jbyteArray usb_jni_read_descriptors(JNIEnv* env, int fd) {
|
||
|
|
if (TEMP_FAILURE_RETRY(lseek(fd, 0, SEEK_SET)) == -1) {
|
||
|
|
ALOGE("usb_jni_read_descriptors(%d): lseek() failed: %s", fd, strerror(errno));
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
jbyte buf[MAX_DESCRIPTORS_LENGTH];
|
||
|
|
ssize_t n = TEMP_FAILURE_RETRY(read(fd, buf, sizeof(buf)));
|
||
|
|
if (n == -1) {
|
||
|
|
ALOGE("usb_jni_read_descriptors: read failed: %s", strerror(errno));
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
jbyteArray result = env->NewByteArray(n);
|
||
|
|
if (result) env->SetByteArrayRegion(result, 0, n, buf);
|
||
|
|
return result;
|
||
|
|
}
|