src/XmlParser.cc - master - githubmirror/aria2

src/XmlParser.cc
82 строки2 KB
Tatsuhiro Tsujikawa
Fix infinite loop bug when file is not found
20 май 2017, 06:45
20 май 2017, 06:458785342
/* <!-- copyright */
/*
 * aria2 - The high speed download utility
 *
 * Copyright (C) 2012 Tatsuhiro Tsujikawa
 *
 * 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 2 of the License, 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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * In addition, as a special exception, the copyright holders give
 * permission to link the code of portions of this program with the
 * OpenSSL library under certain conditions as described in each
 * individual source file, and distribute linked combinations
 * including the two.
 * You must obey the GNU General Public License in all respects
 * for all of the code used other than OpenSSL.  If you modify
 * file(s) with this exception, you may extend this exception to your
 * version of the file(s), but you are not obligated to do so.  If you
 * do not wish to do so, delete this exception statement from your
 * version.  If you delete this exception statement from all source
 * files in the program, then also delete it here.
 */
/* copyright --> */
#include "XmlParser.h"

#include <array>

#include "a2io.h"
#include "util.h"

namespace aria2 {

namespace xml {

bool parseFile(const std::string& filename, ParserStateMachine* psm)
{
  int fd;
  if (filename == DEV_STDIN) {
    fd = STDIN_FILENO;
  }
  else {
    while ((fd = a2open(utf8ToWChar(filename).c_str(), O_BINARY | O_RDONLY,
                        OPEN_MODE)) == -1 &&
           errno == EINTR)
      ;
    if (fd == -1) {
      return false;
    }
  }
  auto fdclose = defer(fd, close);
  XmlParser ps(psm);
  std::array<char, 4_k> buf;
  ssize_t nread;
  bool retval = true;
  while ((nread = read(fd, buf.data(), buf.size())) > 0) {
    if (ps.parseUpdate(buf.data(), nread) < 0) {
      retval = false;
      break;
    }
  }
  if (nread == 0 && retval) {
    if (ps.parseFinal(nullptr, 0) < 0) {
      retval = false;
    }
  }
  return retval;
}

} // namespace xml

} // namespace aria2