Atmosphere/stratosphere/ams_mitm/source/fs_mitm/fs_ifile.hpp

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/*
* Copyright (c) 2018 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <switch.h>
#include <stratosphere.hpp>
#include "fs_shim.h"
enum FsIFileCmd : u32 {
FsIFileCmd_Read = 0,
FsIFileCmd_Write = 1,
FsIFileCmd_Flush = 2,
FsIFileCmd_SetSize = 3,
FsIFileCmd_GetSize = 4,
FsIFileCmd_OperateRange = 5,
};
class IFile {
public:
virtual ~IFile() {}
Result Read(uint64_t *out, uint64_t offset, void *buffer, uint64_t size, uint32_t flags) {
(void)(flags);
if (out == nullptr) {
return ResultFsNullptrArgument;
}
if (size == 0) {
*out = 0;
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return ResultSuccess;
}
if (buffer == nullptr) {
return ResultFsNullptrArgument;
}
return ReadImpl(out, offset, buffer, size);
}
Result Read(uint64_t *out, uint64_t offset, void *buffer, uint64_t size) {
return Read(out, offset, buffer, size, 0);
}
Result GetSize(uint64_t *out) {
if (out == nullptr) {
return ResultFsNullptrArgument;
}
return GetSizeImpl(out);
}
Result Flush() {
return FlushImpl();
}
Result Write(uint64_t offset, void *buffer, uint64_t size, uint32_t flags) {
if (size == 0) {
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return ResultSuccess;
}
if (buffer == nullptr) {
return ResultFsNullptrArgument;
}
const bool flush = (flags & 1) != 0;
return WriteImpl(offset, buffer, size, flush);
}
Result Write(uint64_t offset, void *buffer, uint64_t size, bool flush = false) {
if (size == 0) {
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return ResultSuccess;
}
if (buffer == nullptr) {
return ResultFsNullptrArgument;
}
return WriteImpl(offset, buffer, size, flush);
}
Result SetSize(uint64_t size) {
return SetSizeImpl(size);
}
Result OperateRange(u32 operation_type, u64 offset, u64 size, FsRangeInfo *out_range_info) {
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if (operation_type == 3) {
return OperateRangeImpl(operation_type, offset, size, out_range_info);
}
return ResultFsUnsupportedOperation;
}
protected:
/* ...? */
private:
virtual Result ReadImpl(u64 *out, u64 offset, void *buffer, u64 size) = 0;
virtual Result GetSizeImpl(u64 *out) = 0;
virtual Result FlushImpl() = 0;
virtual Result WriteImpl(u64 offset, void *buffer, u64 size, bool flush) = 0;
virtual Result SetSizeImpl(u64 size) = 0;
virtual Result OperateRangeImpl(u32 operation_type, u64 offset, u64 size, FsRangeInfo *out_range_info) = 0;
};
class IFileInterface : public IServiceObject {
private:
std::unique_ptr<IFile> base_file;
public:
IFileInterface(IFile *f) : base_file(f) {
/* ... */
};
IFileInterface(std::unique_ptr<IFile> f) : base_file(std::move(f)) {
/* ... */
};
private:
/* Actual command API. */
virtual Result Read(OutBuffer<u8, BufferType_Type1> buffer, Out<u64> out_read, u64 offset, u64 size, u32 read_flags) final {
return this->base_file->Read(out_read.GetPointer(), offset, buffer.buffer, std::min(buffer.num_elements, size), read_flags);
};
virtual Result Write(InBuffer<u8, BufferType_Type1> buffer, u64 offset, u64 size, u32 write_flags) final {
return this->base_file->Write(offset, buffer.buffer, std::min(buffer.num_elements, size), write_flags);
};
virtual Result Flush() final {
return this->base_file->Flush();
};
virtual Result SetSize(u64 size) final {
return this->base_file->SetSize(size);
};
virtual Result GetSize(Out<u64> size) final {
return this->base_file->GetSize(size.GetPointer());
};
virtual Result OperateRange(Out<FsRangeInfo> range_info, u32 operation_type, u64 offset, u64 size) final {
return this->base_file->OperateRange(operation_type, offset, size, range_info.GetPointer());
};
public:
DEFINE_SERVICE_DISPATCH_TABLE {
/* 1.0.0- */
MakeServiceCommandMeta<FsIFileCmd_Read, &IFileInterface::Read>(),
MakeServiceCommandMeta<FsIFileCmd_Write, &IFileInterface::Write>(),
MakeServiceCommandMeta<FsIFileCmd_Flush, &IFileInterface::Flush>(),
MakeServiceCommandMeta<FsIFileCmd_SetSize, &IFileInterface::SetSize>(),
MakeServiceCommandMeta<FsIFileCmd_GetSize, &IFileInterface::GetSize>(),
/* 4.0.0- */
MakeServiceCommandMeta<FsIFileCmd_OperateRange, &IFileInterface::OperateRange, FirmwareVersion_400>(),
};
};
class ProxyFile : public IFile {
private:
std::unique_ptr<FsFile> base_file;
public:
ProxyFile(FsFile *f) : base_file(f) {
/* ... */
}
ProxyFile(std::unique_ptr<FsFile> f) : base_file(std::move(f)) {
/* ... */
}
ProxyFile(FsFile f) {
this->base_file = std::make_unique<FsFile>(f);
}
virtual ~ProxyFile() {
fsFileClose(this->base_file.get());
}
public:
virtual Result ReadImpl(u64 *out, u64 offset, void *buffer, u64 size) override {
size_t out_sz;
Result rc = fsFileRead(this->base_file.get(), offset, buffer, size, &out_sz);
if (R_SUCCEEDED(rc)) {
*out = out_sz;
}
return rc;
}
virtual Result GetSizeImpl(u64 *out) override {
return fsFileGetSize(this->base_file.get(), out);
}
virtual Result FlushImpl() override {
return fsFileFlush(this->base_file.get());
}
virtual Result WriteImpl(u64 offset, void *buffer, u64 size, bool flush) override {
Result rc = fsFileWrite(this->base_file.get(), offset, buffer, size);
if (R_SUCCEEDED(rc)) {
/* libnx doesn't allow passing the flush flag. */
rc = fsFileFlush(this->base_file.get());
}
return rc;
}
virtual Result SetSizeImpl(u64 size) override {
return fsFileSetSize(this->base_file.get(), size);
}
virtual Result OperateRangeImpl(u32 operation_type, u64 offset, u64 size, FsRangeInfo *out_range_info) override {
return fsFileOperateRange(this->base_file.get(), operation_type, offset, size, out_range_info);
}
};