Merge native

app/src/main/java/com/hippo/UriArchiveAccessor.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2022 Tarsin Norbin
+ *
+ * This file is part of EhViewer
+ *
+ * EhViewer is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * EhViewer is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with EhViewer.
+ * If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.hippo;
+
+import android.content.Context;
+import android.net.Uri;
+import android.os.ParcelFileDescriptor;
+import android.system.Os;
+import android.system.OsConstants;
+
+import java.io.FileDescriptor;
+
+public class UriArchiveAccessor {
+    ParcelFileDescriptor pfd;
+    FileDescriptor fd;
+    long archiveAddr;
+    Context ctx;
+    Uri uri;
+
+    public UriArchiveAccessor(Context ctx, Uri uri) {
+        this.ctx = ctx;
+        this.uri = uri;
+    }
+
+    public int open() throws Exception {
+        pfd = ctx.getContentResolver().openFileDescriptor(uri, "r");
+        fd = pfd.getFileDescriptor();
+        archiveAddr = Os.mmap(0, pfd.getStatSize(), OsConstants.PROT_READ, OsConstants.MAP_PRIVATE, fd, 0);
+        return openArchive(archiveAddr, pfd.getStatSize());
+    }
+
+    private native int openArchive(long addr, long size);
+
+    public native long extracttoOutputStream(int index);
+
+    public native boolean needPassword();
+
+    public native boolean providePassword(String str);
+
+    private native void closeArchive();
+
+    public void close() throws Exception {
+        closeArchive();
+        Os.munmap(archiveAddr, pfd.getStatSize());
+        Os.close(fd);
+        pfd.close();
+    }
+}