Parse torrent file on the fly if --follow-torrent=mem is given

In this changes, Bencode parser in bencode2 is removed and the request
is delegated to BencodeParser.

1 files changed, 111 insertions, 0 deletions

diff --git a/src/ValueBaseDiskWriter.h b/src/ValueBaseDiskWriter.h
new file mode 100644
index 00000000..3f326c96
--- /dev/null
+++ b/src/ValueBaseDiskWriter.h
@@ -0,0 +1,111 @@
+/* <!-- copyright */
+/*
+ * aria2 - The high speed download utility
+ *
+ * Copyright (C) 2012 Tatsuhiro Tsujikawa
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of portions of this program with the
+ * OpenSSL library under certain conditions as described in each
+ * individual source file, and distribute linked combinations
+ * including the two.
+ * You must obey the GNU General Public License in all respects
+ * for all of the code used other than OpenSSL.  If you modify
+ * file(s) with this exception, you may extend this exception to your
+ * version of the file(s), but you are not obligated to do so.  If you
+ * do not wish to do so, delete this exception statement from your
+ * version.  If you delete this exception statement from all source
+ * files in the program, then also delete it here.
+ */
+/* copyright --> */
+#ifndef D_VALUE_BASE_DISK_WRITER_H
+#define D_VALUE_BASE_DISK_WRITER_H
+
+#include "DiskWriter.h"
+#include "ValueBaseStructParserStateMachine.h"
+
+namespace aria2 {
+
+// DiskWriter backed with ValueBaseParser. The written bytes are
+// consumed by ValueBaseParser. It is only capable of sequential write
+// so offset argument in write() will be ignored. It also does not
+// offer read().
+template<class ValueBaseParser>
+class ValueBaseDiskWriter : public DiskWriter {
+public:
+  ValueBaseDiskWriter()
+    : parser_(&psm_)
+  {}
+
+  virtual ~ValueBaseDiskWriter()
+  {}
+
+  virtual void initAndOpenFile(int64_t totalLength = 0)
+  {
+    parser_.reset();
+  }
+
+  virtual void openFile(int64_t totalLength = 0)
+  {
+    initAndOpenFile(totalLength);
+  }
+
+  virtual void closeFile() {}
+
+  virtual void openExistingFile(int64_t totalLength = 0)
+  {
+    initAndOpenFile(totalLength);
+  }
+
+  virtual int64_t size()
+  {
+    return 0;
+  }
+
+  virtual void writeData(const unsigned char* data, size_t len, int64_t offset)
+  {
+    // Return value is ignored here but handled in finalize()
+    parser_.parseUpdate(reinterpret_cast<const char*>(data), len);
+  }
+
+  virtual ssize_t readData(unsigned char* data, size_t len, int64_t offset)
+  {
+    return 0;
+  }
+
+  int finalize()
+  {
+    return parser_.parseFinal(0, 0);
+  }
+
+  SharedHandle<ValueBase> getResult() const
+  {
+    return psm_.getResult();
+  }
+
+  void reset()
+  {
+    parser_.reset();
+  }
+private:
+  ValueBaseStructParserStateMachine psm_;
+  ValueBaseParser parser_;
+};
+
+} // namespace aria2
+
+#endif // D_VALUE_BASE_DISK_WRITER_H