/*

 * Copyright (c) 2015, 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.

 *

 */

#include "precompiled.hpp"

#include "classfile/classListParser.hpp"

#include "runtime/os.hpp"

#include "runtime/java.hpp"

ClassListParser::ClassListParser(const char* file) {

  _classlist_file = file;

  _file = fopen(file, "r");

  if (_file == NULL) {

    char errmsg[JVM_MAXPATHLEN];

    os::lasterror(errmsg, JVM_MAXPATHLEN);

    vm_exit_during_initialization("Loading classlist failed", errmsg);

  }

}

ClassListParser::~ClassListParser() {

  if (_file) {

    fclose(_file);

  }

}

bool ClassListParser::parse_one_line() {

  for (;;) {

    if (fgets(_line, sizeof(_line), _file) == NULL) {

      return false;

    }

    int line_len = (int)strlen(_line);

    if (line_len > _max_allowed_line_len) {

      tty->print_cr("input line too long (must be no longer than %d chars)", _max_allowed_line_len);

      vm_exit_during_initialization("Loading classlist failed");

    }

    if (*_line == '#') { // comment

      continue;

    }

    break;

  }

  // Remove trailing \r\n

  _line[strcspn(_line, "\r\n")] = 0;

  return true;

}