1 files changed, 79 insertions, 0 deletions
diff --git a/core/jni/android_backup_FileBackupHelper.cpp b/core/jni/android_backup_FileBackupHelper.cpp
new file mode 100644
index 0000000..e8d60a0
--- /dev/null
+++ b/core/jni/android_backup_FileBackupHelper.cpp
@@ -0,0 +1,79 @@
+/*
+ * 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.
+ */
+
+#include "JNIHelp.h"
+#include <android_runtime/AndroidRuntime.h>
+
+#include <utils/backup_helpers.h>
+
+namespace android
+{
+
+static jfieldID s_descriptorField;
+
+static int
+performBackup_native(JNIEnv* env, jstring basePath,
+            jobject oldSnapshot, jobject newSnapshot,
+            jobject data, jobjectArray files)
+{
+    int err;
+
+    // all parameters have already been checked against null
+
+    int oldSnapshotFD = env->GetIntField(oldSnapshot, s_descriptorField);
+    int newSnapshotFD = env->GetIntField(newSnapshot, s_descriptorField);
+    int dataFD = env->GetIntField(data, s_descriptorField);
+
+    char const* basePathUTF = env->GetStringUTFChars(basePath, NULL);
+    const int fileCount = env->GetArrayLength(files);
+    char const** filesUTF = (char const**)malloc(sizeof(char*)*fileCount);
+    for (int i=0; i<fileCount; i++) {
+        filesUTF[i] = env->GetStringUTFChars((jstring)env->GetObjectArrayElement(files, i), NULL);
+    }
+
+    err = back_up_files(oldSnapshotFD, newSnapshotFD, dataFD, basePathUTF, filesUTF, fileCount);
+
+    for (int i=0; i<fileCount; i++) {
+        env->ReleaseStringUTFChars((jstring)env->GetObjectArrayElement(files, i), filesUTF[i]);
+    }
+    free(filesUTF);
+    env->ReleaseStringUTFChars(basePath, basePathUTF);
+
+    return err;
+}
+
+static const JNINativeMethod g_methods[] = {
+    { "performBackup_native",
+        "(Ljava/lang/String;Ljava/io/FileDescriptor;Ljava/io/FileDescriptor;"
+        "Ljava/io/FileDescriptor;[Ljava/lang/String;)I",
+        (void*)performBackup_native },
+};
+
+int register_android_backup_FileBackupHelper(JNIEnv* env)
+{
+    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/FileBackupHelper",
+            g_methods, NELEM(g_methods));
+}
+
+}