fs: Add path class

This commit is contained in:
FearlessTobi 2024-01-18 23:08:37 +01:00 committed by Liam
parent 54372fdff5
commit 2c049ae06d
11 changed files with 2228 additions and 30 deletions

View file

@ -19,4 +19,21 @@ inline T WrappingAdd(T lhs, T rhs) {
return BitCast<T>(lhs_u + rhs_u);
}
template <typename T>
requires(std::is_integral_v<T> && std::is_signed_v<T>)
inline bool CanAddWithoutOverflow(T lhs, T rhs) {
#ifdef _MSC_VER
if (lhs >= 0 && rhs >= 0) {
return WrappingAdd(lhs, rhs) >= std::max(lhs, rhs);
} else if (lhs < 0 && rhs < 0) {
return WrappingAdd(lhs, rhs) <= std::min(lhs, rhs);
} else {
return true;
}
#else
T res;
return !__builtin_add_overflow(lhs, rhs, &res);
#endif
}
} // namespace Common

View file

@ -58,7 +58,7 @@ add_library(core STATIC
file_sys/fs_operate_range.h
file_sys/fs_path.h
file_sys/fs_path_utility.h
file_sys/fs_util_character_encoding.h
file_sys/fs_string_util.h
file_sys/fsmitm_romfsbuild.cpp
file_sys/fsmitm_romfsbuild.h
file_sys/fssystem/fs_i_storage.h
@ -104,25 +104,10 @@ add_library(core STATIC
file_sys/fssystem/fssystem_switch_storage.h
file_sys/fssystem/fssystem_utility.cpp
file_sys/fssystem/fssystem_utility.h
file_sys/fssystem/fs_types.h
file_sys/bis_factory.cpp
file_sys/bis_factory.h
file_sys/card_image.cpp
file_sys/card_image.h
file_sys/common_funcs.h
file_sys/content_archive.cpp
file_sys/content_archive.h
file_sys/control_metadata.cpp
file_sys/control_metadata.h
file_sys/directory.h
file_sys/errors.h
file_sys/fsmitm_romfsbuild.cpp
file_sys/fsmitm_romfsbuild.h
file_sys/ips_layer.cpp
file_sys/ips_layer.h
file_sys/kernel_executable.cpp
file_sys/kernel_executable.h
file_sys/mode.h
file_sys/nca_metadata.cpp
file_sys/nca_metadata.h
file_sys/partition_filesystem.cpp
@ -215,7 +200,6 @@ add_library(core STATIC
hle/kernel/board/nintendo/nx/secure_monitor.h
hle/kernel/code_set.cpp
hle/kernel/code_set.h
hle/kernel/svc_results.h
hle/kernel/global_scheduler_context.cpp
hle/kernel/global_scheduler_context.h
hle/kernel/init/init_slab_setup.cpp
@ -225,11 +209,11 @@ add_library(core STATIC
hle/kernel/k_address_arbiter.h
hle/kernel/k_address_space_info.cpp
hle/kernel/k_address_space_info.h
hle/kernel/k_affinity_mask.h
hle/kernel/k_auto_object.cpp
hle/kernel/k_auto_object.h
hle/kernel/k_auto_object_container.cpp
hle/kernel/k_auto_object_container.h
hle/kernel/k_affinity_mask.h
hle/kernel/k_capabilities.cpp
hle/kernel/k_capabilities.h
hle/kernel/k_class_token.cpp
@ -253,9 +237,9 @@ add_library(core STATIC
hle/kernel/k_event_info.h
hle/kernel/k_handle_table.cpp
hle/kernel/k_handle_table.h
hle/kernel/k_hardware_timer_base.h
hle/kernel/k_hardware_timer.cpp
hle/kernel/k_hardware_timer.h
hle/kernel/k_hardware_timer_base.h
hle/kernel/k_interrupt_manager.cpp
hle/kernel/k_interrupt_manager.h
hle/kernel/k_light_client_session.cpp
@ -282,10 +266,10 @@ add_library(core STATIC
hle/kernel/k_page_bitmap.h
hle/kernel/k_page_buffer.cpp
hle/kernel/k_page_buffer.h
hle/kernel/k_page_heap.cpp
hle/kernel/k_page_heap.h
hle/kernel/k_page_group.cpp
hle/kernel/k_page_group.h
hle/kernel/k_page_heap.cpp
hle/kernel/k_page_heap.h
hle/kernel/k_page_table.h
hle/kernel/k_page_table_base.cpp
hle/kernel/k_page_table_base.h
@ -350,8 +334,6 @@ add_library(core STATIC
hle/kernel/slab_helpers.h
hle/kernel/svc.cpp
hle/kernel/svc.h
hle/kernel/svc_common.h
hle/kernel/svc_types.h
hle/kernel/svc/svc_activity.cpp
hle/kernel/svc/svc_address_arbiter.cpp
hle/kernel/svc/svc_address_translation.cpp
@ -389,6 +371,9 @@ add_library(core STATIC
hle/kernel/svc/svc_thread_profiler.cpp
hle/kernel/svc/svc_tick.cpp
hle/kernel/svc/svc_transfer_memory.cpp
hle/kernel/svc_common.h
hle/kernel/svc_results.h
hle/kernel/svc_types.h
hle/result.h
hle/service/acc/acc.cpp
hle/service/acc/acc.h
@ -519,17 +504,17 @@ add_library(core STATIC
hle/service/filesystem/fsp/fs_i_filesystem.h
hle/service/filesystem/fsp/fs_i_storage.cpp
hle/service/filesystem/fsp/fs_i_storage.h
hle/service/filesystem/fsp/fsp_ldr.cpp
hle/service/filesystem/fsp/fsp_ldr.h
hle/service/filesystem/fsp/fsp_pr.cpp
hle/service/filesystem/fsp/fsp_pr.h
hle/service/filesystem/fsp/fsp_srv.cpp
hle/service/filesystem/fsp/fsp_srv.h
hle/service/filesystem/fsp_ldr.cpp
hle/service/filesystem/fsp_ldr.h
hle/service/filesystem/fsp_pr.cpp
hle/service/filesystem/fsp_pr.h
hle/service/filesystem/fsp/fsp_util.h
hle/service/filesystem/romfs_controller.cpp
hle/service/filesystem/romfs_controller.h
hle/service/filesystem/save_data_controller.cpp
hle/service/filesystem/save_data_controller.h
hle/service/filesystem/fsp_util.h
hle/service/fgm/fgm.cpp
hle/service/fgm/fgm.h
hle/service/friend/friend.cpp

View file

@ -73,10 +73,21 @@ constexpr Result ResultUnexpectedInCompressedStorageA{ErrorModule::FS, 5324};
constexpr Result ResultUnexpectedInCompressedStorageB{ErrorModule::FS, 5325};
constexpr Result ResultUnexpectedInCompressedStorageC{ErrorModule::FS, 5326};
constexpr Result ResultUnexpectedInCompressedStorageD{ErrorModule::FS, 5327};
constexpr Result ResultUnexpectedInPathA{ErrorModule::FS, 5328};
constexpr Result ResultInvalidArgument{ErrorModule::FS, 6001};
constexpr Result ResultInvalidPath{ErrorModule::FS, 6002};
constexpr Result ResultTooLongPath{ErrorModule::FS, 6003};
constexpr Result ResultInvalidCharacter{ErrorModule::FS, 6004};
constexpr Result ResultInvalidPathFormat{ErrorModule::FS, 6005};
constexpr Result ResultDirectoryUnobtainable{ErrorModule::FS, 6006};
constexpr Result ResultNotNormalized{ErrorModule::FS, 6007};
constexpr Result ResultInvalidOffset{ErrorModule::FS, 6061};
constexpr Result ResultInvalidSize{ErrorModule::FS, 6062};
constexpr Result ResultNullptrArgument{ErrorModule::FS, 6063};
constexpr Result ResultInvalidOpenMode{ErrorModule::FS, 6072};
constexpr Result ResultFileExtensionWithoutOpenModeAllowAppend{ErrorModule::FS, 6201};
constexpr Result ResultReadNotPermitted{ErrorModule::FS, 6202};
constexpr Result ResultWriteNotPermitted{ErrorModule::FS, 6203};
constexpr Result ResultUnsupportedSetSizeForIndirectStorage{ErrorModule::FS, 6325};
constexpr Result ResultUnsupportedWriteForCompressedStorage{ErrorModule::FS, 6387};
constexpr Result ResultUnsupportedOperateRangeForCompressedStorage{ErrorModule::FS, 6388};

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@ -0,0 +1,63 @@
// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
namespace FileSys {
struct ReadOption {
u32 _value;
static const ReadOption None;
};
enum ReadOptionFlag : u32 {
ReadOptionFlag_None = (0 << 0),
};
inline constexpr const ReadOption ReadOption::None = {ReadOptionFlag_None};
inline constexpr bool operator==(const ReadOption& lhs, const ReadOption& rhs) {
return lhs._value == rhs._value;
}
inline constexpr bool operator!=(const ReadOption& lhs, const ReadOption& rhs) {
return !(lhs == rhs);
}
static_assert(sizeof(ReadOption) == sizeof(u32));
enum WriteOptionFlag : u32 {
WriteOptionFlag_None = (0 << 0),
WriteOptionFlag_Flush = (1 << 0),
};
struct WriteOption {
u32 _value;
constexpr inline bool HasFlushFlag() const {
return _value & WriteOptionFlag_Flush;
}
static const WriteOption None;
static const WriteOption Flush;
};
inline constexpr const WriteOption WriteOption::None = {WriteOptionFlag_None};
inline constexpr const WriteOption WriteOption::Flush = {WriteOptionFlag_Flush};
inline constexpr bool operator==(const WriteOption& lhs, const WriteOption& rhs) {
return lhs._value == rhs._value;
}
inline constexpr bool operator!=(const WriteOption& lhs, const WriteOption& rhs) {
return !(lhs == rhs);
}
static_assert(sizeof(WriteOption) == sizeof(u32));
struct FileHandle {
void* handle;
};
} // namespace FileSys

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@ -0,0 +1,48 @@
// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <mutex>
#include "common/alignment.h"
namespace FileSys {
std::mutex g_mutex;
constexpr size_t RequiredAlignment = alignof(u64);
void* AllocateUnsafe(size_t size) {
/* Allocate. */
void* const ptr = ::operator new(size, std::align_val_t{RequiredAlignment});
/* Check alignment. */
ASSERT(Common::IsAligned(reinterpret_cast<uintptr_t>(ptr), RequiredAlignment));
/* Return allocated pointer. */
return ptr;
}
void DeallocateUnsafe(void* ptr, size_t size) {
/* Deallocate the pointer. */
::operator delete(ptr, std::align_val_t{RequiredAlignment});
}
void* Allocate(size_t size) {
/* Lock the allocator. */
std::scoped_lock lk(g_mutex);
return AllocateUnsafe(size);
}
void Deallocate(void* ptr, size_t size) {
/* If the pointer is non-null, deallocate it. */
if (ptr != nullptr) {
/* Lock the allocator. */
std::scoped_lock lk(g_mutex);
DeallocateUnsafe(ptr, size);
}
}
} // namespace FileSys

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@ -0,0 +1,20 @@
// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
namespace FileSys {
enum class OperationId : s64 {
FillZero = 0,
DestroySignature = 1,
Invalidate = 2,
QueryRange = 3,
QueryUnpreparedRange = 4,
QueryLazyLoadCompletionRate = 5,
SetLazyLoadPriority = 6,
ReadLazyLoadFileForciblyForDebug = 10001,
};
} // namespace FileSys

570
src/core/file_sys/fs_path.h Normal file
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@ -0,0 +1,570 @@
// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include "common/alignment.h"
#include "common/common_funcs.h"
#include "core/file_sys/errors.h"
#include "core/file_sys/fs_memory_management.h"
#include "core/file_sys/fs_path_utility.h"
#include "core/file_sys/fs_string_util.h"
#include "core/hle/result.h"
namespace FileSys {
class DirectoryPathParser;
class Path {
YUZU_NON_COPYABLE(Path);
YUZU_NON_MOVEABLE(Path);
private:
static constexpr const char* EmptyPath = "";
static constexpr size_t WriteBufferAlignmentLength = 8;
private:
friend class DirectoryPathParser;
public:
class WriteBuffer {
YUZU_NON_COPYABLE(WriteBuffer);
private:
char* m_buffer;
size_t m_length_and_is_normalized;
public:
constexpr WriteBuffer() : m_buffer(nullptr), m_length_and_is_normalized(0) { /* ... */
}
constexpr ~WriteBuffer() {
if (m_buffer != nullptr) {
Deallocate(m_buffer, this->GetLength());
this->ResetBuffer();
}
}
constexpr WriteBuffer(WriteBuffer&& rhs)
: m_buffer(rhs.m_buffer), m_length_and_is_normalized(rhs.m_length_and_is_normalized) {
rhs.ResetBuffer();
}
constexpr WriteBuffer& operator=(WriteBuffer&& rhs) {
if (m_buffer != nullptr) {
Deallocate(m_buffer, this->GetLength());
}
m_buffer = rhs.m_buffer;
m_length_and_is_normalized = rhs.m_length_and_is_normalized;
rhs.ResetBuffer();
return *this;
}
constexpr void ResetBuffer() {
m_buffer = nullptr;
this->SetLength(0);
}
constexpr char* Get() const {
return m_buffer;
}
constexpr size_t GetLength() const {
return m_length_and_is_normalized >> 1;
}
constexpr bool IsNormalized() const {
return static_cast<bool>(m_length_and_is_normalized & 1);
}
constexpr void SetNormalized() {
m_length_and_is_normalized |= static_cast<size_t>(1);
}
constexpr void SetNotNormalized() {
m_length_and_is_normalized &= ~static_cast<size_t>(1);
}
private:
constexpr WriteBuffer(char* buffer, size_t length)
: m_buffer(buffer), m_length_and_is_normalized(0) {
this->SetLength(length);
}
public:
static WriteBuffer Make(size_t length) {
if (void* alloc = Allocate(length); alloc != nullptr) {
return WriteBuffer(static_cast<char*>(alloc), length);
} else {
return WriteBuffer();
}
}
private:
constexpr void SetLength(size_t size) {
m_length_and_is_normalized = (m_length_and_is_normalized & 1) | (size << 1);
}
};
private:
const char* m_str;
WriteBuffer m_write_buffer;
public:
constexpr Path() : m_str(EmptyPath), m_write_buffer() {
/* ... */
}
constexpr Path(const char* s) : m_str(s), m_write_buffer() {
m_write_buffer.SetNormalized();
}
constexpr ~Path() { /* ... */
}
constexpr Result SetShallowBuffer(const char* buffer) {
/* Check pre-conditions. */
ASSERT(m_write_buffer.GetLength() == 0);
/* Check the buffer is valid. */
R_UNLESS(buffer != nullptr, ResultNullptrArgument);
/* Set buffer. */
this->SetReadOnlyBuffer(buffer);
/* Note that we're normalized. */
this->SetNormalized();
R_SUCCEED();
}
constexpr const char* GetString() const {
/* Check pre-conditions. */
ASSERT(this->IsNormalized());
return m_str;
}
constexpr size_t GetLength() const {
if (std::is_constant_evaluated()) {
return Strlen(this->GetString());
} else {
return std::strlen(this->GetString());
}
}
constexpr bool IsEmpty() const {
return *m_str == '\x00';
}
constexpr bool IsMatchHead(const char* p, size_t len) const {
return Strncmp(this->GetString(), p, len) == 0;
}
Result Initialize(const Path& rhs) {
/* Check the other path is normalized. */
const bool normalized = rhs.IsNormalized();
R_UNLESS(normalized, ResultNotNormalized);
/* Allocate buffer for our path. */
const auto len = rhs.GetLength();
R_TRY(this->Preallocate(len + 1));
/* Copy the path. */
const size_t copied = Strlcpy<char>(m_write_buffer.Get(), rhs.GetString(), len + 1);
R_UNLESS(copied == len, ResultUnexpectedInPathA);
/* Set normalized. */
this->SetNormalized();
R_SUCCEED();
}
Result Initialize(const char* path, size_t len) {
/* Check the path is valid. */
R_UNLESS(path != nullptr, ResultNullptrArgument);
/* Initialize. */
R_TRY(this->InitializeImpl(path, len));
/* Set not normalized. */
this->SetNotNormalized();
R_SUCCEED();
}
Result Initialize(const char* path) {
/* Check the path is valid. */
R_UNLESS(path != nullptr, ResultNullptrArgument);
R_RETURN(this->Initialize(path, std::strlen(path)));
}
Result InitializeWithReplaceBackslash(const char* path) {
/* Check the path is valid. */
R_UNLESS(path != nullptr, ResultNullptrArgument);
/* Initialize. */
R_TRY(this->InitializeImpl(path, std::strlen(path)));
/* Replace slashes as desired. */
if (const auto write_buffer_length = m_write_buffer.GetLength(); write_buffer_length > 1) {
Replace(m_write_buffer.Get(), write_buffer_length - 1, '\\', '/');
}
/* Set not normalized. */
this->SetNotNormalized();
R_SUCCEED();
}
Result InitializeWithReplaceForwardSlashes(const char* path) {
/* Check the path is valid. */
R_UNLESS(path != nullptr, ResultNullptrArgument);
/* Initialize. */
R_TRY(this->InitializeImpl(path, std::strlen(path)));
/* Replace slashes as desired. */
if (m_write_buffer.GetLength() > 1) {
if (auto* p = m_write_buffer.Get(); p[0] == '/' && p[1] == '/') {
p[0] = '\\';
p[1] = '\\';
}
}
/* Set not normalized. */
this->SetNotNormalized();
R_SUCCEED();
}
Result InitializeWithNormalization(const char* path, size_t size) {
/* Check the path is valid. */
R_UNLESS(path != nullptr, ResultNullptrArgument);
/* Initialize. */
R_TRY(this->InitializeImpl(path, size));
/* Set not normalized. */
this->SetNotNormalized();
/* Perform normalization. */
PathFlags path_flags;
if (IsPathRelative(m_str)) {
path_flags.AllowRelativePath();
} else if (IsWindowsPath(m_str, true)) {
path_flags.AllowWindowsPath();
} else {
/* NOTE: In this case, Nintendo checks is normalized, then sets is normalized, then
* returns success. */
/* This seems like a bug. */
size_t dummy;
bool normalized;
R_TRY(PathFormatter::IsNormalized(std::addressof(normalized), std::addressof(dummy),
m_str));
this->SetNormalized();
R_SUCCEED();
}
/* Normalize. */
R_TRY(this->Normalize(path_flags));
this->SetNormalized();
R_SUCCEED();
}
Result InitializeWithNormalization(const char* path) {
/* Check the path is valid. */
R_UNLESS(path != nullptr, ResultNullptrArgument);
R_RETURN(this->InitializeWithNormalization(path, std::strlen(path)));
}
Result InitializeAsEmpty() {
/* Clear our buffer. */
this->ClearBuffer();
/* Set normalized. */
this->SetNormalized();
R_SUCCEED();
}
Result AppendChild(const char* child) {
/* Check the path is valid. */
R_UNLESS(child != nullptr, ResultNullptrArgument);
/* Basic checks. If we hvea a path and the child is empty, we have nothing to do. */
const char* c = child;
if (m_str[0]) {
/* Skip an early separator. */
if (*c == '/') {
++c;
}
R_SUCCEED_IF(*c == '\x00');
}
/* If we don't have a string, we can just initialize. */
auto cur_len = std::strlen(m_str);
if (cur_len == 0) {
R_RETURN(this->Initialize(child));
}
/* Remove a trailing separator. */
if (m_str[cur_len - 1] == '/' || m_str[cur_len - 1] == '\\') {
--cur_len;
}
/* Get the child path's length. */
auto child_len = std::strlen(c);
/* Reset our write buffer. */
WriteBuffer old_write_buffer;
if (m_write_buffer.Get() != nullptr) {
old_write_buffer = std::move(m_write_buffer);
this->ClearBuffer();
}
/* Pre-allocate the new buffer. */
R_TRY(this->Preallocate(cur_len + 1 + child_len + 1));
/* Get our write buffer. */
auto* dst = m_write_buffer.Get();
if (old_write_buffer.Get() != nullptr && cur_len > 0) {
Strlcpy<char>(dst, old_write_buffer.Get(), cur_len + 1);
}
/* Add separator. */
dst[cur_len] = '/';
/* Copy the child path. */
const size_t copied = Strlcpy<char>(dst + cur_len + 1, c, child_len + 1);
R_UNLESS(copied == child_len, ResultUnexpectedInPathA);
R_SUCCEED();
}
Result AppendChild(const Path& rhs) {
R_RETURN(this->AppendChild(rhs.GetString()));
}
Result Combine(const Path& parent, const Path& child) {
/* Get the lengths. */
const auto p_len = parent.GetLength();
const auto c_len = child.GetLength();
/* Allocate our buffer. */
R_TRY(this->Preallocate(p_len + c_len + 1));
/* Initialize as parent. */
R_TRY(this->Initialize(parent));
/* If we're empty, we can just initialize as child. */
if (this->IsEmpty()) {
R_TRY(this->Initialize(child));
} else {
/* Otherwise, we should append the child. */
R_TRY(this->AppendChild(child));
}
R_SUCCEED();
}
Result RemoveChild() {
/* If we don't have a write-buffer, ensure that we have one. */
if (m_write_buffer.Get() == nullptr) {
if (const auto len = std::strlen(m_str); len > 0) {
R_TRY(this->Preallocate(len));
Strlcpy<char>(m_write_buffer.Get(), m_str, len + 1);
}
}
/* Check that it's possible for us to remove a child. */
auto* p = m_write_buffer.Get();
s32 len = std::strlen(p);
R_UNLESS(len != 1 || (p[0] != '/' && p[0] != '.'), ResultNotImplemented);
/* Handle a trailing separator. */
if (len > 0 && (p[len - 1] == '\\' || p[len - 1] == '/')) {
--len;
}
/* Remove the child path segment. */
while ((--len) >= 0 && p[len]) {
if (p[len] == '/' || p[len] == '\\') {
if (len > 0) {
p[len] = 0;
} else {
p[1] = 0;
len = 1;
}
break;
}
}
/* Check that length remains > 0. */
R_UNLESS(len > 0, ResultNotImplemented);
R_SUCCEED();
}
Result Normalize(const PathFlags& flags) {
/* If we're already normalized, nothing to do. */
R_SUCCEED_IF(this->IsNormalized());
/* Check if we're normalized. */
bool normalized;
size_t dummy;
R_TRY(PathFormatter::IsNormalized(std::addressof(normalized), std::addressof(dummy), m_str,
flags));
/* If we're not normalized, normalize. */
if (!normalized) {
/* Determine necessary buffer length. */
auto len = m_write_buffer.GetLength();
if (flags.IsRelativePathAllowed() && IsPathRelative(m_str)) {
len += 2;
}
if (flags.IsWindowsPathAllowed() && IsWindowsPath(m_str, true)) {
len += 1;
}
/* Allocate a new buffer. */
const size_t size = Common::AlignUp(len, WriteBufferAlignmentLength);
auto buf = WriteBuffer::Make(size);
R_UNLESS(buf.Get() != nullptr, ResultAllocationMemoryFailedMakeUnique);
/* Normalize into it. */
R_TRY(PathFormatter::Normalize(buf.Get(), size, m_write_buffer.Get(),
m_write_buffer.GetLength(), flags));
/* Set the normalized buffer as our buffer. */
this->SetModifiableBuffer(std::move(buf));
}
/* Set normalized. */
this->SetNormalized();
R_SUCCEED();
}
private:
void ClearBuffer() {
m_write_buffer.ResetBuffer();
m_str = EmptyPath;
}
void SetModifiableBuffer(WriteBuffer&& buffer) {
/* Check pre-conditions. */
ASSERT(buffer.Get() != nullptr);
ASSERT(buffer.GetLength() > 0);
ASSERT(Common::IsAligned(buffer.GetLength(), WriteBufferAlignmentLength));
/* Get whether we're normalized. */
if (m_write_buffer.IsNormalized()) {
buffer.SetNormalized();
} else {
buffer.SetNotNormalized();
}
/* Set write buffer. */
m_write_buffer = std::move(buffer);
m_str = m_write_buffer.Get();
}
constexpr void SetReadOnlyBuffer(const char* buffer) {
m_str = buffer;
m_write_buffer.ResetBuffer();
}
Result Preallocate(size_t length) {
/* Allocate additional space, if needed. */
if (length > m_write_buffer.GetLength()) {
/* Allocate buffer. */
const size_t size = Common::AlignUp(length, WriteBufferAlignmentLength);
auto buf = WriteBuffer::Make(size);
R_UNLESS(buf.Get() != nullptr, ResultAllocationMemoryFailedMakeUnique);
/* Set write buffer. */
this->SetModifiableBuffer(std::move(buf));
}
R_SUCCEED();
}
Result InitializeImpl(const char* path, size_t size) {
if (size > 0 && path[0]) {
/* Pre allocate a buffer for the path. */
R_TRY(this->Preallocate(size + 1));
/* Copy the path. */
const size_t copied = Strlcpy<char>(m_write_buffer.Get(), path, size + 1);
R_UNLESS(copied >= size, ResultUnexpectedInPathA);
} else {
/* We can just clear the buffer. */
this->ClearBuffer();
}
R_SUCCEED();
}
constexpr char* GetWriteBuffer() {
ASSERT(m_write_buffer.Get() != nullptr);
return m_write_buffer.Get();
}
constexpr size_t GetWriteBufferLength() const {
return m_write_buffer.GetLength();
}
constexpr bool IsNormalized() const {
return m_write_buffer.IsNormalized();
}
constexpr void SetNormalized() {
m_write_buffer.SetNormalized();
}
constexpr void SetNotNormalized() {
m_write_buffer.SetNotNormalized();
}
public:
bool operator==(const FileSys::Path& rhs) const {
return std::strcmp(this->GetString(), rhs.GetString()) == 0;
}
bool operator!=(const FileSys::Path& rhs) const {
return !(*this == rhs);
}
bool operator==(const char* p) const {
return std::strcmp(this->GetString(), p) == 0;
}
bool operator!=(const char* p) const {
return !(*this == p);
}
};
inline Result SetUpFixedPath(FileSys::Path* out, const char* s) {
/* Verify the path is normalized. */
bool normalized;
size_t dummy;
R_TRY(PathNormalizer::IsNormalized(std::addressof(normalized), std::addressof(dummy), s));
R_UNLESS(normalized, ResultInvalidPathFormat);
/* Set the fixed path. */
R_RETURN(out->SetShallowBuffer(s));
}
constexpr inline bool IsWindowsDriveRootPath(const FileSys::Path& path) {
const char* const str = path.GetString();
return IsWindowsDrive(str) &&
(str[2] == StringTraits::DirectorySeparator ||
str[2] == StringTraits::AlternateDirectorySeparator) &&
str[3] == StringTraits::NullTerminator;
}
} // namespace FileSys

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@ -0,0 +1,241 @@
// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include "common/assert.h"
namespace FileSys {
template <typename T>
constexpr int Strlen(const T* str) {
ASSERT(str != nullptr);
int length = 0;
while (*str++) {
++length;
}
return length;
}
template <typename T>
constexpr int Strnlen(const T* str, int count) {
ASSERT(str != nullptr);
ASSERT(count >= 0);
int length = 0;
while (count-- && *str++) {
++length;
}
return length;
}
template <typename T>
constexpr int Strncmp(const T* lhs, const T* rhs, int count) {
ASSERT(lhs != nullptr);
ASSERT(rhs != nullptr);
ASSERT(count >= 0);
if (count == 0) {
return 0;
}
T l, r;
do {
l = *(lhs++);
r = *(rhs++);
} while (l && (l == r) && (--count));
return l - r;
}
template <typename T>
static constexpr int Strlcpy(T* dst, const T* src, int count) {
ASSERT(dst != nullptr);
ASSERT(src != nullptr);
const T* cur = src;
if (count > 0) {
while ((--count) && *cur) {
*(dst++) = *(cur++);
}
*dst = 0;
}
while (*cur) {
cur++;
}
return static_cast<int>(cur - src);
}
/* std::size() does not support zero-size C arrays. We're fixing that. */
template <class C>
constexpr auto size(const C& c) -> decltype(c.size()) {
return std::size(c);
}
template <class C>
constexpr std::size_t size(const C& c) {
if constexpr (sizeof(C) == 0) {
return 0;
} else {
return std::size(c);
}
}
enum CharacterEncodingResult {
CharacterEncodingResult_Success = 0,
CharacterEncodingResult_InsufficientLength = 1,
CharacterEncodingResult_InvalidFormat = 2,
};
namespace impl {
class CharacterEncodingHelper {
public:
static constexpr int8_t Utf8NBytesInnerTable[0x100 + 1] = {
-1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 7, 8,
};
static constexpr char GetUtf8NBytes(size_t i) {
return static_cast<char>(Utf8NBytesInnerTable[1 + i]);
}
};
} // namespace impl
constexpr inline CharacterEncodingResult ConvertCharacterUtf8ToUtf32(u32* dst, const char* src) {
/* Check pre-conditions. */
ASSERT(dst != nullptr);
ASSERT(src != nullptr);
/* Perform the conversion. */
const auto* p = src;
switch (impl::CharacterEncodingHelper::GetUtf8NBytes(static_cast<unsigned char>(p[0]))) {
case 1:
*dst = static_cast<u32>(p[0]);
return CharacterEncodingResult_Success;
case 2:
if ((static_cast<u32>(p[0]) & 0x1E) != 0) {
if (impl::CharacterEncodingHelper::GetUtf8NBytes(static_cast<unsigned char>(p[1])) ==
0) {
*dst = (static_cast<u32>(p[0] & 0x1F) << 6) | (static_cast<u32>(p[1] & 0x3F) << 0);
return CharacterEncodingResult_Success;
}
}
break;
case 3:
if (impl::CharacterEncodingHelper::GetUtf8NBytes(static_cast<unsigned char>(p[1])) == 0 &&
impl::CharacterEncodingHelper::GetUtf8NBytes(static_cast<unsigned char>(p[2])) == 0) {
const u32 c = (static_cast<u32>(p[0] & 0xF) << 12) |
(static_cast<u32>(p[1] & 0x3F) << 6) |
(static_cast<u32>(p[2] & 0x3F) << 0);
if ((c & 0xF800) != 0 && (c & 0xF800) != 0xD800) {
*dst = c;
return CharacterEncodingResult_Success;
}
}
return CharacterEncodingResult_InvalidFormat;
case 4:
if (impl::CharacterEncodingHelper::GetUtf8NBytes(static_cast<unsigned char>(p[1])) == 0 &&
impl::CharacterEncodingHelper::GetUtf8NBytes(static_cast<unsigned char>(p[2])) == 0 &&
impl::CharacterEncodingHelper::GetUtf8NBytes(static_cast<unsigned char>(p[3])) == 0) {
const u32 c =
(static_cast<u32>(p[0] & 0x7) << 18) | (static_cast<u32>(p[1] & 0x3F) << 12) |
(static_cast<u32>(p[2] & 0x3F) << 6) | (static_cast<u32>(p[3] & 0x3F) << 0);
if (c >= 0x10000 && c < 0x110000) {
*dst = c;
return CharacterEncodingResult_Success;
}
}
return CharacterEncodingResult_InvalidFormat;
default:
break;
}
/* We failed to convert. */
return CharacterEncodingResult_InvalidFormat;
}
constexpr inline CharacterEncodingResult PickOutCharacterFromUtf8String(char* dst,
const char** str) {
/* Check pre-conditions. */
ASSERT(dst != nullptr);
ASSERT(str != nullptr);
ASSERT(*str != nullptr);
/* Clear the output. */
dst[0] = 0;
dst[1] = 0;
dst[2] = 0;
dst[3] = 0;
/* Perform the conversion. */
const auto* p = *str;
u32 c = static_cast<u32>(*p);
switch (impl::CharacterEncodingHelper::GetUtf8NBytes(c)) {
case 1:
dst[0] = (*str)[0];
++(*str);
break;
case 2:
if ((p[0] & 0x1E) != 0) {
if (impl::CharacterEncodingHelper::GetUtf8NBytes(static_cast<unsigned char>(p[1])) ==
0) {
c = (static_cast<u32>(p[0] & 0x1F) << 6) | (static_cast<u32>(p[1] & 0x3F) << 0);
dst[0] = (*str)[0];
dst[1] = (*str)[1];
(*str) += 2;
break;
}
}
return CharacterEncodingResult_InvalidFormat;
case 3:
if (impl::CharacterEncodingHelper::GetUtf8NBytes(static_cast<unsigned char>(p[1])) == 0 &&
impl::CharacterEncodingHelper::GetUtf8NBytes(static_cast<unsigned char>(p[2])) == 0) {
c = (static_cast<u32>(p[0] & 0xF) << 12) | (static_cast<u32>(p[1] & 0x3F) << 6) |
(static_cast<u32>(p[2] & 0x3F) << 0);
if ((c & 0xF800) != 0 && (c & 0xF800) != 0xD800) {
dst[0] = (*str)[0];
dst[1] = (*str)[1];
dst[2] = (*str)[2];
(*str) += 3;
break;
}
}
return CharacterEncodingResult_InvalidFormat;
case 4:
if (impl::CharacterEncodingHelper::GetUtf8NBytes(static_cast<unsigned char>(p[1])) == 0 &&
impl::CharacterEncodingHelper::GetUtf8NBytes(static_cast<unsigned char>(p[2])) == 0 &&
impl::CharacterEncodingHelper::GetUtf8NBytes(static_cast<unsigned char>(p[3])) == 0) {
c = (static_cast<u32>(p[0] & 0x7) << 18) | (static_cast<u32>(p[1] & 0x3F) << 12) |
(static_cast<u32>(p[2] & 0x3F) << 6) | (static_cast<u32>(p[3] & 0x3F) << 0);
if (c >= 0x10000 && c < 0x110000) {
dst[0] = (*str)[0];
dst[1] = (*str)[1];
dst[2] = (*str)[2];
dst[3] = (*str)[3];
(*str) += 4;
break;
}
}
return CharacterEncodingResult_InvalidFormat;
default:
return CharacterEncodingResult_InvalidFormat;
}
return CharacterEncodingResult_Success;
}
} // namespace FileSys

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@ -1,6 +1,7 @@
// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "core/file_sys/fs_filesystem.h"
#include "core/file_sys/savedata_factory.h"
#include "core/hle/service/filesystem/fsp/fs_i_directory.h"
#include "core/hle/service/ipc_helpers.h"

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@ -3,12 +3,14 @@
#pragma once
#include "core/file_sys/fs_filesystem.h"
#include "core/file_sys/vfs/vfs.h"
#include "core/hle/service/filesystem/filesystem.h"
#include "core/hle/service/filesystem/fsp/fsp_util.h"
#include "core/hle/service/service.h"
namespace FileSys {
struct DirectoryEntry;
}
namespace Service::FileSystem {
class IDirectory final : public ServiceFramework<IDirectory> {