88 lines
1.9 KiB
C++
88 lines
1.9 KiB
C++
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/*
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* Copyright (C) 2003-2013 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_FS_DIRECTORY_READER_HXX
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#define MPD_FS_DIRECTORY_READER_HXX
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#include "check.h"
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#include "Path.hxx"
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#include <dirent.h>
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/**
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* Reader for directory entries.
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*/
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class DirectoryReader {
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DIR *const dirp;
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dirent *ent;
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public:
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/**
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* Creates new directory reader for the specified #dir.
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*/
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explicit DirectoryReader(const Path &dir)
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: dirp(opendir(dir.c_str())),
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ent(nullptr) {
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}
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DirectoryReader(const DirectoryReader &other) = delete;
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DirectoryReader &operator=(const DirectoryReader &other) = delete;
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/**
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* Destroys this instance.
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*/
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~DirectoryReader() {
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if (!Failed())
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closedir(dirp);
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}
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/**
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* Checks if directory failed to open.
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*/
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bool Failed() const {
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return dirp == nullptr;
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}
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/**
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* Checks if directory entry is available.
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*/
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bool HasEntry() const {
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assert(!Failed());
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return ent != nullptr;
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}
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/**
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* Reads next directory entry.
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*/
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bool ReadEntry() {
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assert(!Failed());
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ent = readdir(dirp);
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return HasEntry();
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}
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/**
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* Extracts directory entry that was previously read by #ReadEntry.
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*/
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Path GetEntry() const {
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assert(HasEntry());
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return Path::FromFS(ent->d_name);
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}
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};
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#endif
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