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2022-04-16 21:27:49 +08:00

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C++

/**
* @file IFileSystem.h
* @brief Declaration of tc::io::IFileSystem
* @author Jack (jakcron)
* @version 0.6
* @date 2019/06/18
**/
#pragma once
#include <tc/types.h>
#include <tc/ResourceStatus.h>
#include <tc/io/IStream.h>
#include <tc/io/Path.h>
#include <tc/io/FileMode.h>
#include <tc/io/FileAccess.h>
namespace tc { namespace io {
/**
* @struct sDirectoryListing
* @brief Contains basic info about a directory with-in a FileSystem
*
* The includes the absolute path of the directory, and lists of child directory and file names.
*
* @note All strings are UTF-8
**/
struct sDirectoryListing
{
/// Absolute Path
tc::io::Path abs_path;
/// List of child directory names
std::vector<std::string> dir_list;
/// List of child file names
std::vector<std::string> file_list;
};
/**
* @class IFileSystem
*
* @brief An interface for implementing a basic FileSystem handler.
*
* Defines expected functionality including:
* - File access (open)
* - File management (create, remove)
* - Directory traversal (get current directory, change current directory)
* - Directory management (create, remove)
* - Directory listing
*
* @note IFileSystem uses the tc::io::Path class to represent a path, not as a literal string.
* @note It is up to the implementation of IFileSystem to validate and process tc::io::Path objects.
* @note It is up to the implementation to enforce tc::io::FileMode & tc::io::FileAccess.
**/
class IFileSystem
{
public:
/**
* @brief Destructor
**/
virtual ~IFileSystem() = default;
/**
* @brief Get state of IFileSystem
* @return ResourceStatus
**/
virtual tc::ResourceStatus state() = 0;
/**
* @brief Close the filesystem
**/
virtual void dispose() = 0;
/**
* @brief Create a new file
* @param[in] path A relative or absolute path to file.
**/
virtual void createFile(const tc::io::Path& path) = 0;
/**
* @brief Remove a file
* @param[in] path A relative or absolute path to file.
**/
virtual void removeFile(const tc::io::Path& path) = 0;
/**
* @brief Open a file
* @param[in] path A relative or absolute path to file.
* @param[in] mode One of the enumeration values that determines how to open or create the file.
* @param[in] access One of the enumeration values that determines how the file can be accessed by the @ref IStream object. This also determines the values returned by the @ref IStream::canRead and @ref IStream::canWrite methods of the IStream object. @ref IStream::canSeek is true if path specifies a disk file.
* @param[out] stream Pointer to IStream object to be instantiated
**/
virtual void openFile(const tc::io::Path& path, tc::io::FileMode mode, tc::io::FileAccess access, std::shared_ptr<tc::io::IStream>& stream) = 0;
/**
* @brief Create a new directory
* @param[in] path A relative or absolute path to directory.
**/
virtual void createDirectory(const tc::io::Path& path) = 0;
/**
* @brief Remove a directory
* @param[in] path A relative or absolute path to directory.
**/
virtual void removeDirectory(const tc::io::Path& path) = 0;
/**
* @brief Get the full path of the working directory
* @param[out] path Path object to populate
**/
virtual void getWorkingDirectory(tc::io::Path& path) = 0;
/**
* @brief Change the working directory
* @param[in] path A relative or absolute path to directory.
**/
virtual void setWorkingDirectory(const tc::io::Path& path) = 0;
/**
* @brief Get directory listing a directory
* @param[in] path A relative or absolute path to directory.
* @param[out] info sDirectoryListing object to populate
**/
virtual void getDirectoryListing(const tc::io::Path& path, tc::io::sDirectoryListing& info) = 0;
};
}} // namespace tc::io