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/*
* libfud
* Copyright 2024 Dominick Allen
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef FUD_DIRECTORY_HPP
#define FUD_DIRECTORY_HPP
#include "fud_result.hpp"
#include "fud_status.hpp"
#include "fud_string.hpp"
#include <cstdint>
#include <cstdio>
#include <ctime>
#include <dirent.h>
#include <optional>
namespace fud {
enum class DirectoryEntryType : uint8_t
{
Block,
Character,
Directory,
NamedPipe,
SymbolicLink,
RegularFile,
UnixSocket,
Unknown
};
constexpr const char* DirectoryEntryTypeToString(DirectoryEntryType entryType)
{
switch (entryType) {
case DirectoryEntryType::Block:
return "Block";
case DirectoryEntryType::Character:
return "Character";
case DirectoryEntryType::Directory:
return "Directory";
case DirectoryEntryType::NamedPipe:
return "Named Pipe";
case DirectoryEntryType::SymbolicLink:
return "Symbolic Link";
case DirectoryEntryType::RegularFile:
return "Regular File";
case DirectoryEntryType::UnixSocket:
return "Unix Socket";
case DirectoryEntryType::Unknown:
default:
return "Unknown";
}
}
struct Stat;
/** \brief Simplified Directory Entry */
struct DirectoryEntry {
String name;
size_t inode;
size_t size;
size_t links;
time_t modificationTime;
DirectoryEntryType entryType;
static Result<DirectoryEntry, FudStatus> fromStat(const String& name, const Stat& statBuffer);
[[nodiscard]] constexpr bool isDirectory() const
{
return entryType == DirectoryEntryType::Directory;
}
[[nodiscard]] constexpr bool isRegularFile() const
{
return entryType == DirectoryEntryType::RegularFile;
}
};
class Directory {
public:
explicit Directory(String name);
Directory(const Directory& rhs) = delete;
Directory(Directory&& rhs);
~Directory();
Directory& operator=(const Directory& rhs) = delete;
Directory& operator=(Directory&& rhs) = delete;
constexpr const String& name() const {
return m_name;
}
constexpr FudStatus status() const
{
return m_status;
}
constexpr int errorCode() const
{
return m_errorCode;
}
Result<DirectoryEntry, FudStatus> info();
Result<std::optional<DirectoryEntry>, FudStatus> getNextEntry();
FudStatus reset();
private:
bool valid() const;
String m_name{};
DIR* m_directory{nullptr};
FudStatus m_status{FudStatus::ObjectInvalid};
int m_errorCode{-1};
int m_dirFd{-1};
};
} // namespace fud
#endif
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