1 /*
   2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_MEMORY_CLASSLISTPARSER_HPP
  26 #define SHARE_VM_MEMORY_CLASSLISTPARSER_HPP
  27 
  28 #include "utilities/exceptions.hpp"
  29 #include "utilities/globalDefinitions.hpp"
  30 
  31 class ClassListParser : public StackObj {
  32   enum {
  33     // Max number of bytes allowed per line in the classlist.
  34     // Theoretically Java class names could be 65535 bytes in length. In reality,
  35     // 4K bytes is more than enough.
  36     _max_allowed_line_len = 4096,
  37     _line_buf_extra       = 10, // for detecting input too long
  38     _line_buf_size        = _max_allowed_line_len + _line_buf_extra
  39   };
  40 
  41   const char* _classlist_file;
  42   FILE* _file;
  43   char  _line[_line_buf_size];  // The buffer that holds the current line.
  44 
  45 public:
  46   ClassListParser(const char* file);
  47   ~ClassListParser();
  48   bool parse_one_line();
  49 
  50   const char* current_class_name() {
  51     return _line;
  52   }
  53 };
  54 
  55 
  56 #endif // SHARE_VM_MEMORY_CLASSLISTPARSER_HPP