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/*
* Copyright (C) 2009 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.
*/
#define LOG_TAG "FileBackupHelper_native"
#include <utils/Log.h>
#include "JNIHelp.h"
#include <android_runtime/AndroidRuntime.h>
#include <utils/BackupHelpers.h>
namespace android
{
static jfieldID s_descriptorField = 0;
static int
ctor_native(JNIEnv* env, jobject clazz, jobject fileDescriptor)
{
int err;
int fd = env->GetIntField(fileDescriptor, s_descriptorField);
if (fd == -1) {
return NULL;
}
return (int)new BackupDataWriter(fd);
}
static void
dtor_native(JNIEnv* env, jobject clazz, int w)
{
delete (BackupDataWriter*)w;
}
static jint
writeEntityHeader_native(JNIEnv* env, jobject clazz, int w, jstring key, int dataSize)
{
int err;
BackupDataWriter* writer = (BackupDataWriter*)w;
const char* keyUTF = env->GetStringUTFChars(key, NULL);
if (keyUTF == NULL) {
return -1;
}
err = writer->WriteEntityHeader(String8(keyUTF), dataSize);
env->ReleaseStringUTFChars(key, keyUTF);
return err;
}
static jint
writeEntityData_native(JNIEnv* env, jobject clazz, int w, jbyteArray data, int size)
{
int err;
BackupDataWriter* writer = (BackupDataWriter*)w;
if (env->GetArrayLength(data) > size) {
// size mismatch
return -1;
}
jbyte* dataBytes = env->GetByteArrayElements(data, NULL);
if (dataBytes == NULL) {
return -1;
}
err = writer->WriteEntityData(dataBytes, size);
env->ReleaseByteArrayElements(data, dataBytes, JNI_ABORT);
return err;
}
static const JNINativeMethod g_methods[] = {
{ "ctor", "(Ljava/io/FileDescriptor;)I", (void*)ctor_native },
{ "dtor", "(I)V", (void*)dtor_native },
{ "writeEntityHeader_native", "(ILjava/lang/String;I)I", (void*)writeEntityHeader_native },
{ "writeEntityData_native", "(I[BI)I", (void*)writeEntityData_native },
};
int register_android_backup_BackupDataOutput(JNIEnv* env)
{
//LOGD("register_android_backup_BackupDataOutput");
jclass clazz;
clazz = env->FindClass("java/io/FileDescriptor");
LOG_FATAL_IF(clazz == NULL, "Unable to find class java.io.FileDescriptor");
s_descriptorField = env->GetFieldID(clazz, "descriptor", "I");
LOG_FATAL_IF(s_descriptorField == NULL,
"Unable to find descriptor field in java.io.FileDescriptor");
return AndroidRuntime::registerNativeMethods(env, "android/backup/BackupDataOutput",
g_methods, NELEM(g_methods));
}
}
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