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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// derived from dir_reader_linux.h
#ifndef BASE_DIR_READER_BSD_H_
#define BASE_DIR_READER_BSD_H_
#pragma once
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <stdint.h>
#include <unistd.h>
#include "base/logging.h"
#include "base/eintr_wrapper.h"
// See the comments in dir_reader_posix.h about this.
namespace base {
class DirReaderBSD {
public:
explicit DirReaderBSD(const char* directory_path)
#ifdef O_DIRECTORY
: fd_(open(directory_path, O_RDONLY | O_DIRECTORY)),
#else
: fd_(open(directory_path, O_RDONLY)),
#endif
offset_(0),
size_(0) {
memset(buf_, 0, sizeof(buf_));
}
~DirReaderBSD() {
if (fd_ >= 0) {
if (HANDLE_EINTR(close(fd_)))
DLOG(ERROR) << "Failed to close directory handle";
}
}
bool IsValid() const {
return fd_ >= 0;
}
// Move to the next entry returning false if the iteration is complete.
bool Next() {
if (size_) {
struct dirent* dirent = reinterpret_cast<struct dirent*>(&buf_[offset_]);
#ifdef OS_DRAGONFLY
offset_ += _DIRENT_DIRSIZ(dirent);
#else
offset_ += dirent->d_reclen;
#endif
}
if (offset_ != size_)
return true;
const int r = getdents(fd_, buf_, sizeof(buf_));
if (r == 0)
return false;
if (r == -1) {
DLOG(ERROR) << "getdents returned an error: " << errno;
return false;
}
size_ = r;
offset_ = 0;
return true;
}
const char* name() const {
if (!size_)
return NULL;
const struct dirent* dirent =
reinterpret_cast<const struct dirent*>(&buf_[offset_]);
return dirent->d_name;
}
int fd() const {
return fd_;
}
static bool IsFallback() {
return false;
}
private:
const int fd_;
char buf_[512];
size_t offset_, size_;
DISALLOW_COPY_AND_ASSIGN(DirReaderBSD);
};
} // namespace base
#endif // BASE_DIR_READER_BSD_H_
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