1 files changed, 128 insertions, 0 deletions
diff --git a/core/jni/android_backup_BackupDataOutput.cpp b/core/jni/android_backup_BackupDataOutput.cpp
new file mode 100644
index 0000000..d02590e
--- /dev/null
+++ b/core/jni/android_backup_BackupDataOutput.cpp
@@ -0,0 +1,128 @@
+/*
+ * 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 void
+setKeyPrefix_native(JNIEnv* env, jobject clazz, int w, jstring keyPrefixObj)
+{
+    int err;
+    BackupDataWriter* writer = (BackupDataWriter*)w;
+
+    const char* keyPrefixUTF = env->GetStringUTFChars(keyPrefixObj, NULL);
+    String8 keyPrefix(keyPrefixUTF ? keyPrefixUTF : "");
+
+    writer->SetKeyPrefix(keyPrefix);
+
+    env->ReleaseStringUTFChars(keyPrefixObj, keyPrefixUTF);
+}
+
+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 },
+    { "setKeyPrefix_native", "(ILjava/lang/String;)V", (void*)setKeyPrefix_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));
+}
+
+}