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vfs: Add RealVfsFilesystem implementation

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This commit is contained in:
Zach Hilman
2018-08-03 11:50:00 -04:00
parent 3f82dad1e4
commit 2de2ec25d6
2 changed files with 290 additions and 81 deletions
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44
src/core/file_sys/vfs_real.h
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@ -6,18 +6,45 @@
#include <string_view>
#include <boost/container/flat_map.hpp>
#include "common/file_util.h"
#include "core/file_sys/mode.h"
#include "core/file_sys/vfs.h"
namespace FileSys {
class RealVfsFilesystem : public VfsFilesystem {
public:
RealVfsFilesystem();
std::string GetName() const override;
bool IsReadable() const override;
bool IsWritable() const override;
VfsEntryType GetEntryType(std::string_view path) const override;
VirtualFile OpenFile(std::string_view path, Mode perms = Mode::Read) override;
VirtualFile CreateFile(std::string_view path, Mode perms = Mode::ReadWrite) override;
VirtualFile CopyFile(std::string_view old_path, std::string_view new_path) override;
VirtualFile MoveFile(std::string_view old_path, std::string_view new_path) override;
bool DeleteFile(std::string_view path) override;
VirtualDir OpenDirectory(std::string_view path, Mode perms = Mode::Read) override;
VirtualDir CreateDirectory(std::string_view path, Mode perms = Mode::ReadWrite) override;
VirtualDir CopyDirectory(std::string_view old_path, std::string_view new_path) override;
VirtualDir MoveDirectory(std::string_view old_path, std::string_view new_path) override;
bool DeleteDirectory(std::string_view path) override;
private:
boost::container::flat_map<std::string, std::weak_ptr<FileUtil::IOFile>> cache;
};
// An implmentation of VfsFile that represents a file on the user's computer.
struct RealVfsFile : public VfsFile {
friend struct RealVfsDirectory;
class RealVfsFile : public VfsFile {
friend class RealVfsDirectory;
friend class RealVfsFilesystem;
RealVfsFile(const std::string& name, Mode perms = Mode::Read);
RealVfsFile(RealVfsFilesystem& base, std::shared_ptr<FileUtil::IOFile> backing,
const std::string& path, Mode perms = Mode::Read);
public:
std::string GetName() const override;
size_t GetSize() const override;
bool Resize(size_t new_size) override;
@ -31,7 +58,8 @@ struct RealVfsFile : public VfsFile {
private:
bool Close();
FileUtil::IOFile backing;
RealVfsFilesystem& base;
std::shared_ptr<FileUtil::IOFile> backing;
std::string path;
std::string parent_path;
std::vector<std::string> path_components;
@ -40,9 +68,12 @@ private:
};
// An implementation of VfsDirectory that represents a directory on the user's computer.
struct RealVfsDirectory : public VfsDirectory {
RealVfsDirectory(const std::string& path, Mode perms = Mode::Read);
class RealVfsDirectory : public VfsDirectory {
friend class RealVfsFilesystem;
RealVfsDirectory(RealVfsFilesystem& base, const std::string& path, Mode perms = Mode::Read);
public:
std::vector<std::shared_ptr<VfsFile>> GetFiles() const override;
std::vector<std::shared_ptr<VfsDirectory>> GetSubdirectories() const override;
bool IsWritable() const override;
@ -60,6 +91,7 @@ protected:
bool ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) override;
private:
RealVfsFilesystem& base;
std::string path;
std::string parent_path;
std::vector<std::string> path_components;