1 files changed, 51 insertions, 0 deletions
diff --git a/gprofng/src/DataStream.h b/gprofng/src/DataStream.h
new file mode 100644
index 00000000000..59ee293292f
--- /dev/null
+++ b/gprofng/src/DataStream.h
@@ -0,0 +1,51 @@
+/* Copyright (C) 2021 Free Software Foundation, Inc.
+   Contributed by Oracle.
+
+   This file is part of GNU Binutils.
+
+   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 3, 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, 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+#ifndef _DATASTREAM_H
+#define _DATASTREAM_H
+
+#include "Data_window.h"
+
+// sequential access to the file
+class DataStream : public Data_window
+{
+public:
+  // Create an empty data window.
+  DataStream (char *file_name);
+  ~DataStream ();
+  void set_span (int64_t f_offset, int64_t sz);
+  int64_t read (void *buf, int64_t len);
+
+  template <typename Key_t> inline int64_t
+  read (Key_t &val)
+  {
+    int64_t sz = read (&val, sizeof (val));
+    if (need_swap_endian && sz == sizeof (val))
+      swapByteOrder (&val, sizeof (val));
+    return sz;
+  }
+
+private:
+  int64_t span_offset;
+  int64_t span_size;        // the window size
+  int64_t span_fileoffset;  // the window begin on the file
+};
+
+#endif /* _DATASTREAM_H */