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// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "core/file_sys/errors.h"
#include "core/hle/service/filesystem/fsp/fs_i_file.h"
#include "core/hle/service/ipc_helpers.h"
namespace Service::FileSystem {
IFile::IFile(Core::System& system_, FileSys::VirtualFile backend_)
: ServiceFramework{system_, "IFile"}, backend(std::move(backend_)) {
static const FunctionInfo functions[] = {
{0, &IFile::Read, "Read"},
{1, &IFile::Write, "Write"},
{2, &IFile::Flush, "Flush"},
{3, &IFile::SetSize, "SetSize"},
{4, &IFile::GetSize, "GetSize"},
{5, nullptr, "OperateRange"},
{6, nullptr, "OperateRangeWithBuffer"},
};
RegisterHandlers(functions);
}
void IFile::Read(HLERequestContext& ctx) {
IPC::RequestParser rp{ctx};
const u64 option = rp.Pop<u64>();
const s64 offset = rp.Pop<s64>();
const s64 length = rp.Pop<s64>();
LOG_DEBUG(Service_FS, "called, option={}, offset=0x{:X}, length={}", option, offset, length);
// Error checking
if (length < 0) {
LOG_ERROR(Service_FS, "Length is less than 0, length={}", length);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(FileSys::ERROR_INVALID_SIZE);
return;
}
if (offset < 0) {
LOG_ERROR(Service_FS, "Offset is less than 0, offset={}", offset);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(FileSys::ERROR_INVALID_OFFSET);
return;
}
// Read the data from the Storage backend
std::vector<u8> output = backend->ReadBytes(length, offset);
// Write the data to memory
ctx.WriteBuffer(output);
IPC::ResponseBuilder rb{ctx, 4};
rb.Push(ResultSuccess);
rb.Push(static_cast<u64>(output.size()));
}
void IFile::Write(HLERequestContext& ctx) {
IPC::RequestParser rp{ctx};
const u64 option = rp.Pop<u64>();
const s64 offset = rp.Pop<s64>();
const s64 length = rp.Pop<s64>();
LOG_DEBUG(Service_FS, "called, option={}, offset=0x{:X}, length={}", option, offset, length);
// Error checking
if (length < 0) {
LOG_ERROR(Service_FS, "Length is less than 0, length={}", length);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(FileSys::ERROR_INVALID_SIZE);
return;
}
if (offset < 0) {
LOG_ERROR(Service_FS, "Offset is less than 0, offset={}", offset);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(FileSys::ERROR_INVALID_OFFSET);
return;
}
const auto data = ctx.ReadBuffer();
ASSERT_MSG(static_cast<s64>(data.size()) <= length,
"Attempting to write more data than requested (requested={:016X}, actual={:016X}).",
length, data.size());
// Write the data to the Storage backend
const auto write_size =
static_cast<std::size_t>(std::distance(data.begin(), data.begin() + length));
const std::size_t written = backend->Write(data.data(), write_size, offset);
ASSERT_MSG(static_cast<s64>(written) == length,
"Could not write all bytes to file (requested={:016X}, actual={:016X}).", length,
written);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ResultSuccess);
}
void IFile::Flush(HLERequestContext& ctx) {
LOG_DEBUG(Service_FS, "called");
// Exists for SDK compatibiltity -- No need to flush file.
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ResultSuccess);
}
void IFile::SetSize(HLERequestContext& ctx) {
IPC::RequestParser rp{ctx};
const u64 size = rp.Pop<u64>();
LOG_DEBUG(Service_FS, "called, size={}", size);
backend->Resize(size);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ResultSuccess);
}
void IFile::GetSize(HLERequestContext& ctx) {
const u64 size = backend->GetSize();
LOG_DEBUG(Service_FS, "called, size={}", size);
IPC::ResponseBuilder rb{ctx, 4};
rb.Push(ResultSuccess);
rb.Push<u64>(size);
}
} // namespace Service::FileSystem
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