111 lines
3.0 KiB
C++
111 lines
3.0 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2
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// Refer to the license.txt file included.
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#include <sys/stat.h>
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#include "common/common_types.h"
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#include "common/file_util.h"
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#include "core/file_sys/file_sdmc.h"
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#include "core/file_sys/archive_sdmc.h"
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// FileSys namespace
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namespace FileSys {
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File_SDMC::File_SDMC(const Archive_SDMC* archive, const Path& path, const Mode mode) {
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// TODO(Link Mauve): normalize path into an absolute path without "..", it can currently bypass
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// the root directory we set while opening the archive.
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// For example, opening /../../etc/passwd can give the emulated program your users list.
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this->path = archive->GetMountPoint() + path.AsString();
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this->mode.hex = mode.hex;
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}
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File_SDMC::~File_SDMC() {
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Close();
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}
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/**
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* Open the file
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* @return true if the file opened correctly
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*/
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bool File_SDMC::Open() {
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if (!mode.create_flag && !FileUtil::Exists(path)) {
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LOG_ERROR(Service_FS, "Non-existing file %s can’t be open without mode create.", path.c_str());
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return false;
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}
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std::string mode_string;
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if (mode.create_flag)
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mode_string = "w+";
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else if (mode.write_flag)
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mode_string = "r+"; // Files opened with Write access can be read from
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else if (mode.read_flag)
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mode_string = "r";
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// Open the file in binary mode, to avoid problems with CR/LF on Windows systems
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mode_string += "b";
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file = new FileUtil::IOFile(path, mode_string.c_str());
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return true;
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}
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/**
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* Read data from the file
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* @param offset Offset in bytes to start reading data from
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* @param length Length in bytes of data to read from file
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* @param buffer Buffer to read data into
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* @return Number of bytes read
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*/
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size_t File_SDMC::Read(const u64 offset, const u32 length, u8* buffer) const {
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file->Seek(offset, SEEK_SET);
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return file->ReadBytes(buffer, length);
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}
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/**
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* Write data to the file
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* @param offset Offset in bytes to start writing data to
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* @param length Length in bytes of data to write to file
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* @param flush The flush parameters (0 == do not flush)
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* @param buffer Buffer to read data from
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* @return Number of bytes written
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*/
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size_t File_SDMC::Write(const u64 offset, const u32 length, const u32 flush, const u8* buffer) const {
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file->Seek(offset, SEEK_SET);
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size_t written = file->WriteBytes(buffer, length);
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if (flush)
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file->Flush();
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return written;
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}
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/**
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* Get the size of the file in bytes
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* @return Size of the file in bytes
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*/
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size_t File_SDMC::GetSize() const {
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return static_cast<size_t>(file->GetSize());
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}
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/**
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* Set the size of the file in bytes
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* @param size New size of the file
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* @return true if successful
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*/
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bool File_SDMC::SetSize(const u64 size) const {
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file->Resize(size);
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file->Flush();
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return true;
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}
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/**
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* Close the file
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* @return true if the file closed correctly
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*/
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bool File_SDMC::Close() const {
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return file->Close();
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}
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} // namespace FileSys
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