--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/adlc/filebuff.hpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_ADLC_FILEBUFF_HPP
+#define SHARE_VM_ADLC_FILEBUFF_HPP
+
+// FILEBUFF.HPP - Definitions for parser file buffering routines
+
+// STRUCTURE FOR HANDLING INPUT AND OUTPUT FILES
+
+class BufferedFile {
+ public:
+  const char *_name;
+  FILE *_fp;
+  inline BufferedFile() { _name = NULL; _fp = NULL; };
+  inline ~BufferedFile() {};
+};
+
+class ArchDesc;
+
+//------------------------------FileBuff--------------------------------------
+// This class defines a nicely behaved buffer of text.  Entire file of text
+// is read into buffer at creation, with sentinels at start and end.
+class FileBuff {
+ private:
+  long  _bufferSize;            // Size of text holding buffer.
+  long  _offset;                // Expected filepointer offset.
+  long  _bufoff;                // Start of buffer file offset
+
+  char *_buf;                   // The buffer itself.
+  char *_bigbuf;                // The buffer plus sentinels; actual heap area
+  char *_bufmax;                // A pointer to the buffer end sentinel
+  char *_bufeol;                // A pointer to the last complete line end
+
+  int   _err;                   // Error flag for file seek/read operations
+  long  _filepos;               // Current offset from start of file
+  int   _linenum;
+
+  ArchDesc& _AD;                // Reference to Architecture Description
+
+  // Error reporting function
+  void file_error(int flag, int linenum, const char *fmt, ...);
+
+ public:
+  const BufferedFile *_fp;           // File to be buffered
+
+  FileBuff(BufferedFile *fp, ArchDesc& archDesc); // Constructor
+  ~FileBuff();                  // Destructor
+
+  // This returns a pointer to the start of the current line in the buffer,
+  // and increments bufeol and filepos to point at the end of that line.
+  char *get_line(void);
+  int linenum() const { return _linenum; }
+  void set_linenum(int line) { _linenum = line; }
+
+  // This converts a pointer into the buffer to a file offset.  It only works
+  // when the pointer is valid (i.e. just obtained from getline()).
+  long getoff(const char* s) { return _bufoff + (long)(s - _buf); }
+};
+#endif // SHARE_VM_ADLC_FILEBUFF_HPP