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 <android_runtime/AndroidRuntime.h>
22
23 #include <androidfw/BackupHelpers.h>
24
25 namespace android
26 {
27
28 static int
ctor_native(JNIEnv * env,jobject clazz,jobject fileDescriptor)29 ctor_native(JNIEnv* env, jobject clazz, jobject fileDescriptor)
30 {
31 int fd = jniGetFDFromFileDescriptor(env, fileDescriptor);
32 if (fd == -1) {
33 return NULL;
34 }
35
36 return (int)new BackupDataWriter(fd);
37 }
38
39 static void
dtor_native(JNIEnv * env,jobject clazz,int w)40 dtor_native(JNIEnv* env, jobject clazz, int w)
41 {
42 delete (BackupDataWriter*)w;
43 }
44
45 static jint
writeEntityHeader_native(JNIEnv * env,jobject clazz,int w,jstring key,int dataSize)46 writeEntityHeader_native(JNIEnv* env, jobject clazz, int w, jstring key, int 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 err;
60 }
61
62 static jint
writeEntityData_native(JNIEnv * env,jobject clazz,int w,jbyteArray data,int size)63 writeEntityData_native(JNIEnv* env, jobject clazz, int w, jbyteArray data, int 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 err;
83 }
84
85 static void
setKeyPrefix_native(JNIEnv * env,jobject clazz,int w,jstring keyPrefixObj)86 setKeyPrefix_native(JNIEnv* env, jobject clazz, int w, jstring keyPrefixObj)
87 {
88 int err;
89 BackupDataWriter* writer = (BackupDataWriter*)w;
90
91 const char* keyPrefixUTF = env->GetStringUTFChars(keyPrefixObj, NULL);
92 String8 keyPrefix(keyPrefixUTF ? keyPrefixUTF : "");
93
94 writer->SetKeyPrefix(keyPrefix);
95
96 env->ReleaseStringUTFChars(keyPrefixObj, keyPrefixUTF);
97 }
98
99 static const JNINativeMethod g_methods[] = {
100 { "ctor", "(Ljava/io/FileDescriptor;)I", (void*)ctor_native },
101 { "dtor", "(I)V", (void*)dtor_native },
102 { "writeEntityHeader_native", "(ILjava/lang/String;I)I", (void*)writeEntityHeader_native },
103 { "writeEntityData_native", "(I[BI)I", (void*)writeEntityData_native },
104 { "setKeyPrefix_native", "(ILjava/lang/String;)V", (void*)setKeyPrefix_native },
105 };
106
register_android_backup_BackupDataOutput(JNIEnv * env)107 int register_android_backup_BackupDataOutput(JNIEnv* env)
108 {
109 //ALOGD("register_android_backup_BackupDataOutput");
110 return AndroidRuntime::registerNativeMethods(env, "android/app/backup/BackupDataOutput",
111 g_methods, NELEM(g_methods));
112 }
113
114 }
115