1/*
2 * Copyright (C) 2009 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 "FileBackupHelper_native"
18#include <utils/Log.h>
19
20#include "JNIHelp.h"
21#include "core_jni_helpers.h"
22
23#include <androidfw/BackupHelpers.h>
24
25namespace android
26{
27
28static jlong
29ctor_native(JNIEnv* env, jobject clazz, jobject fileDescriptor)
30{
31    int fd = jniGetFDFromFileDescriptor(env, fileDescriptor);
32    if (fd == -1) {
33        return (jlong)NULL;
34    }
35
36    return (jlong)new BackupDataWriter(fd);
37}
38
39static void
40dtor_native(JNIEnv* env, jobject clazz, jlong w)
41{
42    delete (BackupDataWriter*)w;
43}
44
45static jint
46writeEntityHeader_native(JNIEnv* env, jobject clazz, jlong w, jstring key, jint dataSize)
47{
48    int err;
49    BackupDataWriter* writer = (BackupDataWriter*)w;
50
51    const char* keyUTF = env->GetStringUTFChars(key, NULL);
52    if (keyUTF == NULL) {
53        return -1;
54    }
55    err = writer->WriteEntityHeader(String8(keyUTF), dataSize);
56
57    env->ReleaseStringUTFChars(key, keyUTF);
58
59    return (jint)err;
60}
61
62static jint
63writeEntityData_native(JNIEnv* env, jobject clazz, jlong w, jbyteArray data, jint size)
64{
65    int err;
66    BackupDataWriter* writer = (BackupDataWriter*)w;
67
68    if (env->GetArrayLength(data) < size) {
69        // size mismatch
70        return -1;
71    }
72
73    jbyte* dataBytes = env->GetByteArrayElements(data, NULL);
74    if (dataBytes == NULL) {
75        return -1;
76    }
77
78    err = writer->WriteEntityData(dataBytes, size);
79
80    env->ReleaseByteArrayElements(data, dataBytes, JNI_ABORT);
81
82    return (jint)err;
83}
84
85static void
86setKeyPrefix_native(JNIEnv* env, jobject clazz, jlong w, jstring keyPrefixObj)
87{
88    BackupDataWriter* writer = (BackupDataWriter*)w;
89
90    const char* keyPrefixUTF = env->GetStringUTFChars(keyPrefixObj, NULL);
91    String8 keyPrefix(keyPrefixUTF ? keyPrefixUTF : "");
92
93    writer->SetKeyPrefix(keyPrefix);
94
95    env->ReleaseStringUTFChars(keyPrefixObj, keyPrefixUTF);
96}
97
98static const JNINativeMethod g_methods[] = {
99    { "ctor", "(Ljava/io/FileDescriptor;)J", (void*)ctor_native },
100    { "dtor", "(J)V", (void*)dtor_native },
101    { "writeEntityHeader_native", "(JLjava/lang/String;I)I", (void*)writeEntityHeader_native },
102    { "writeEntityData_native", "(J[BI)I", (void*)writeEntityData_native },
103    { "setKeyPrefix_native", "(JLjava/lang/String;)V", (void*)setKeyPrefix_native },
104};
105
106int register_android_backup_BackupDataOutput(JNIEnv* env)
107{
108    //ALOGD("register_android_backup_BackupDataOutput");
109    return RegisterMethodsOrDie(env, "android/app/backup/BackupDataOutput",
110            g_methods, NELEM(g_methods));
111}
112
113}
114