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 #include "precompiled.hpp"

    26 #include "classfile/classListParser.hpp"

    27 #include "runtime/os.hpp"

    28 #include "runtime/java.hpp"

    29 

    30 ClassListParser::ClassListParser(const char* file) {

    31   _classlist_file = file;

    32   _file = fopen(file, "r");

    33   if (_file == NULL) {

    34     char errmsg[JVM_MAXPATHLEN];

    35     os::lasterror(errmsg, JVM_MAXPATHLEN);

    36     vm_exit_during_initialization("Loading classlist failed", errmsg);

    37   }

    38 }

    39 

    40 ClassListParser::~ClassListParser() {

    41   if (_file) {

    42     fclose(_file);

    43   }

    44 }

    45 

    46 bool ClassListParser::parse_one_line() {

    47   for (;;) {

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

    49       return false;

    50     }

    51     int line_len = (int)strlen(_line);

    52     if (line_len > _max_allowed_line_len) {

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

    54       vm_exit_during_initialization("Loading classlist failed");

    55     }

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

    57       continue;

    58     }

    59     break;

    60   }

    61 

    62   // Remove trailing \r\n

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

    64   return true;

    65 }

    66