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-rw-r--r--src/common/overflow.h17
-rw-r--r--src/core/CMakeLists.txt41
-rw-r--r--src/core/file_sys/errors.h11
-rw-r--r--src/core/file_sys/fs_file.h63
-rw-r--r--src/core/file_sys/fs_memory_management.h48
-rw-r--r--src/core/file_sys/fs_operate_range.h20
-rw-r--r--src/core/file_sys/fs_path.h570
-rw-r--r--src/core/file_sys/fs_path_utility.h1240
-rw-r--r--src/core/file_sys/fs_string_util.h241
-rw-r--r--src/core/hle/service/filesystem/fsp/fs_i_directory.cpp1
-rw-r--r--src/core/hle/service/filesystem/fsp/fs_i_directory.h6
11 files changed, 2228 insertions, 30 deletions
diff --git a/src/common/overflow.h b/src/common/overflow.h
index 44d8e7e73..e765c0d89 100644
--- a/src/common/overflow.h
+++ b/src/common/overflow.h
@@ -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
diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index d71c2cead..347bbf2d0 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -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
diff --git a/src/core/file_sys/errors.h b/src/core/file_sys/errors.h
index 7134445cf..d4e0eb6f4 100644
--- a/src/core/file_sys/errors.h
+++ b/src/core/file_sys/errors.h
@@ -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};
diff --git a/src/core/file_sys/fs_file.h b/src/core/file_sys/fs_file.h
new file mode 100644
index 000000000..35f66b959
--- /dev/null
+++ b/src/core/file_sys/fs_file.h
@@ -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
diff --git a/src/core/file_sys/fs_memory_management.h b/src/core/file_sys/fs_memory_management.h
new file mode 100644
index 000000000..596143ba9
--- /dev/null
+++ b/src/core/file_sys/fs_memory_management.h
@@ -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
diff --git a/src/core/file_sys/fs_operate_range.h b/src/core/file_sys/fs_operate_range.h
new file mode 100644
index 000000000..750999907
--- /dev/null
+++ b/src/core/file_sys/fs_operate_range.h
@@ -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
diff --git a/src/core/file_sys/fs_path.h b/src/core/file_sys/fs_path.h
new file mode 100644
index 000000000..9ea452644
--- /dev/null
+++ b/src/core/file_sys/fs_path.h
@@ -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
diff --git a/src/core/file_sys/fs_path_utility.h b/src/core/file_sys/fs_path_utility.h
new file mode 100644
index 000000000..276445707
--- /dev/null
+++ b/src/core/file_sys/fs_path_utility.h
@@ -0,0 +1,1240 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "common/scope_exit.h"
+#include "core/file_sys/fs_directory.h"
+#include "core/file_sys/fs_memory_management.h"
+#include "core/file_sys/fs_string_util.h"
+#include "core/hle/result.h"
+
+namespace FileSys {
+
+constexpr inline size_t MountNameLengthMax = 15;
+using Result = ::Result;
+
+namespace StringTraits {
+
+constexpr inline char DirectorySeparator = '/';
+constexpr inline char DriveSeparator = ':';
+constexpr inline char Dot = '.';
+constexpr inline char NullTerminator = '\x00';
+
+constexpr inline char AlternateDirectorySeparator = '\\';
+
+constexpr inline const char InvalidCharacters[6] = {':', '*', '?', '<', '>', '|'};
+constexpr inline const char InvalidCharactersForHostName[6] = {':', '*', '<', '>', '|', '$'};
+constexpr inline const char InvalidCharactersForMountName[5] = {'*', '?', '<', '>', '|'};
+
+namespace impl {
+
+template <const char* InvalidCharacterSet, size_t NumInvalidCharacters>
+consteval u64 MakeInvalidCharacterMask(size_t n) {
+ u64 mask = 0;
+ for (size_t i = 0; i < NumInvalidCharacters; ++i) {
+ if ((static_cast<u64>(InvalidCharacterSet[i]) >> 6) == n) {
+ mask |= static_cast<u64>(1) << (static_cast<u64>(InvalidCharacterSet[i]) & 0x3F);
+ }
+ }
+ return mask;
+}
+
+template <const char* InvalidCharacterSet, size_t NumInvalidCharacters>
+constexpr bool IsInvalidCharacterImpl(char c) {
+ constexpr u64 Masks[4] = {
+ MakeInvalidCharacterMask<InvalidCharacterSet, NumInvalidCharacters>(0),
+ MakeInvalidCharacterMask<InvalidCharacterSet, NumInvalidCharacters>(1),
+ MakeInvalidCharacterMask<InvalidCharacterSet, NumInvalidCharacters>(2),
+ MakeInvalidCharacterMask<InvalidCharacterSet, NumInvalidCharacters>(3)};
+
+ return (Masks[static_cast<u64>(c) >> 6] &
+ (static_cast<u64>(1) << (static_cast<u64>(c) & 0x3F))) != 0;
+}
+
+} // namespace impl
+
+constexpr bool IsInvalidCharacter(char c) {
+ return impl::IsInvalidCharacterImpl<InvalidCharacters, size(InvalidCharacters)>(c);
+}
+constexpr bool IsInvalidCharacterForHostName(char c) {
+ return impl::IsInvalidCharacterImpl<InvalidCharactersForHostName,
+ size(InvalidCharactersForHostName)>(c);
+}
+constexpr bool IsInvalidCharacterForMountName(char c) {
+ return impl::IsInvalidCharacterImpl<InvalidCharactersForMountName,
+ size(InvalidCharactersForMountName)>(c);
+}
+
+} // namespace StringTraits
+
+constexpr inline size_t WindowsDriveLength = 2;
+constexpr inline size_t UncPathPrefixLength = 2;
+constexpr inline size_t DosDevicePathPrefixLength = 4;
+
+class PathFlags {
+private:
+ static constexpr u32 WindowsPathFlag = (1 << 0);
+ static constexpr u32 RelativePathFlag = (1 << 1);
+ static constexpr u32 EmptyPathFlag = (1 << 2);
+ static constexpr u32 MountNameFlag = (1 << 3);
+ static constexpr u32 BackslashFlag = (1 << 4);
+ static constexpr u32 AllCharactersFlag = (1 << 5);
+
+private:
+ u32 m_value;
+
+public:
+ constexpr PathFlags() : m_value(0) { /* ... */
+ }
+
+#define DECLARE_PATH_FLAG_HANDLER(__WHICH__) \
+ constexpr bool Is##__WHICH__##Allowed() const { return (m_value & __WHICH__##Flag) != 0; } \
+ constexpr void Allow##__WHICH__() { m_value |= __WHICH__##Flag; }
+
+ DECLARE_PATH_FLAG_HANDLER(WindowsPath)
+ DECLARE_PATH_FLAG_HANDLER(RelativePath)
+ DECLARE_PATH_FLAG_HANDLER(EmptyPath)
+ DECLARE_PATH_FLAG_HANDLER(MountName)
+ DECLARE_PATH_FLAG_HANDLER(Backslash)
+ DECLARE_PATH_FLAG_HANDLER(AllCharacters)
+
+#undef DECLARE_PATH_FLAG_HANDLER
+};
+
+template <typename T>
+ requires(std::same_as<T, char> || std::same_as<T, wchar_t>)
+constexpr inline bool IsDosDevicePath(const T* path) {
+ ASSERT(path != nullptr);
+
+ using namespace StringTraits;
+
+ return path[0] == AlternateDirectorySeparator && path[1] == AlternateDirectorySeparator &&
+ (path[2] == Dot || path[2] == '?') &&
+ (path[3] == DirectorySeparator || path[3] == AlternateDirectorySeparator);
+}
+
+template <typename T>
+ requires(std::same_as<T, char> || std::same_as<T, wchar_t>)
+constexpr inline bool IsUncPath(const T* path, bool allow_forward_slash = true,
+ bool allow_back_slash = true) {
+ ASSERT(path != nullptr);
+
+ using namespace StringTraits;
+
+ return (allow_forward_slash && path[0] == DirectorySeparator &&
+ path[1] == DirectorySeparator) ||
+ (allow_back_slash && path[0] == AlternateDirectorySeparator &&
+ path[1] == AlternateDirectorySeparator);
+}
+
+constexpr inline bool IsWindowsDrive(const char* path) {
+ ASSERT(path != nullptr);
+
+ return (('a' <= path[0] && path[0] <= 'z') || ('A' <= path[0] && path[0] <= 'Z')) &&
+ path[1] == StringTraits::DriveSeparator;
+}
+
+constexpr inline bool IsWindowsPath(const char* path, bool allow_forward_slash_unc) {
+ return IsWindowsDrive(path) || IsDosDevicePath(path) ||
+ IsUncPath(path, allow_forward_slash_unc, true);
+}
+
+constexpr inline int GetWindowsSkipLength(const char* path) {
+ if (IsDosDevicePath(path)) {
+ return DosDevicePathPrefixLength;
+ } else if (IsWindowsDrive(path)) {
+ return WindowsDriveLength;
+ } else if (IsUncPath(path)) {
+ return UncPathPrefixLength;
+ } else {
+ return 0;
+ }
+}
+
+constexpr inline bool IsPathAbsolute(const char* path) {
+ return IsWindowsPath(path, false) || path[0] == StringTraits::DirectorySeparator;
+}
+
+constexpr inline bool IsPathRelative(const char* path) {
+ return path[0] && !IsPathAbsolute(path);
+}
+
+constexpr inline bool IsCurrentDirectory(const char* path) {
+ return path[0] == StringTraits::Dot &&
+ (path[1] == StringTraits::NullTerminator || path[1] == StringTraits::DirectorySeparator);
+}
+
+constexpr inline bool IsParentDirectory(const char* path) {
+ return path[0] == StringTraits::Dot && path[1] == StringTraits::Dot &&
+ (path[2] == StringTraits::NullTerminator || path[2] == StringTraits::DirectorySeparator);
+}
+
+constexpr inline bool IsPathStartWithCurrentDirectory(const char* path) {
+ return IsCurrentDirectory(path) || IsParentDirectory(path);
+}
+
+constexpr inline bool IsSubPath(const char* lhs, const char* rhs) {
+ /* Check pre-conditions. */
+ ASSERT(lhs != nullptr);
+ ASSERT(rhs != nullptr);
+
+ /* Import StringTraits names for current scope. */
+ using namespace StringTraits;
+
+ /* Special case certain paths. */
+ if (IsUncPath(lhs) && !IsUncPath(rhs)) {
+ return false;
+ }
+ if (!IsUncPath(lhs) && IsUncPath(rhs)) {
+ return false;
+ }
+
+ if (lhs[0] == DirectorySeparator && lhs[1] == NullTerminator && rhs[0] == DirectorySeparator &&
+ rhs[1] != NullTerminator) {
+ return true;
+ }
+ if (rhs[0] == DirectorySeparator && rhs[1] == NullTerminator && lhs[0] == DirectorySeparator &&
+ lhs[1] != NullTerminator) {
+ return true;
+ }
+
+ /* Check subpath. */
+ for (size_t i = 0; /* ... */; ++i) {
+ if (lhs[i] == NullTerminator) {
+ return rhs[i] == DirectorySeparator;
+ } else if (rhs[i] == NullTerminator) {
+ return lhs[i] == DirectorySeparator;
+ } else if (lhs[i] != rhs[i]) {
+ return false;
+ }
+ }
+}
+
+/* Path utilities. */
+constexpr inline void Replace(char* dst, size_t dst_size, char old_char, char new_char) {
+ ASSERT(dst != nullptr);
+ for (char* cur = dst; cur < dst + dst_size && *cur; ++cur) {
+ if (*cur == old_char) {
+ *cur = new_char;
+ }
+ }
+}
+
+constexpr inline Result CheckUtf8(const char* s) {
+ /* Check pre-conditions. */
+ ASSERT(s != nullptr);
+
+ /* Iterate, checking for utf8-validity. */
+ while (*s) {
+ char utf8_buf[4] = {};
+
+ const auto pick_res = PickOutCharacterFromUtf8String(utf8_buf, std::addressof(s));
+ R_UNLESS(pick_res == CharacterEncodingResult_Success, ResultInvalidPathFormat);
+
+ u32 dummy;
+ const auto cvt_res = ConvertCharacterUtf8ToUtf32(std::addressof(dummy), utf8_buf);
+ R_UNLESS(cvt_res == CharacterEncodingResult_Success, ResultInvalidPathFormat);
+ }
+
+ R_SUCCEED();
+}
+
+/* Path formatting. */
+class PathNormalizer {
+private:
+ enum class PathState {
+ Start,
+ Normal,
+ FirstSeparator,
+ Separator,
+ CurrentDir,
+ ParentDir,
+ };
+
+private:
+ static constexpr void ReplaceParentDirectoryPath(char* dst, const char* src) {
+ /* Use StringTraits names for remainder of scope. */
+ using namespace StringTraits;
+
+ /* Start with a dir-separator. */
+ dst[0] = DirectorySeparator;
+
+ auto i = 1;
+ while (src[i] != NullTerminator) {
+ if ((src[i - 1] == DirectorySeparator || src[i - 1] == AlternateDirectorySeparator) &&
+ src[i + 0] == Dot && src[i + 1] == Dot &&
+ (src[i + 2] == DirectorySeparator || src[i + 2] == AlternateDirectorySeparator)) {
+ dst[i - 1] = DirectorySeparator;
+ dst[i + 0] = Dot;
+ dst[i + 1] = Dot;
+ dst[i + 2] = DirectorySeparator;
+ i += 3;
+ } else {
+ if (src[i - 1] == AlternateDirectorySeparator && src[i + 0] == Dot &&
+ src[i + 1] == Dot && src[i + 2] == NullTerminator) {
+ dst[i - 1] = DirectorySeparator;
+ dst[i + 0] = Dot;
+ dst[i + 1] = Dot;
+ i += 2;
+ break;
+ }
+
+ dst[i] = src[i];
+ ++i;
+ }
+ }
+
+ dst[i] = StringTraits::NullTerminator;
+ }
+
+public:
+ static constexpr bool IsParentDirectoryPathReplacementNeeded(const char* path) {
+ /* Use StringTraits names for remainder of scope. */
+ using namespace StringTraits;
+
+ if (path[0] != DirectorySeparator && path[0] != AlternateDirectorySeparator) {
+ return false;
+ }
+
+ /* Check to find a parent reference using alternate separators. */
+ if (path[0] != NullTerminator && path[1] != NullTerminator && path[2] != NullTerminator) {
+ size_t i;
+ for (i = 0; path[i + 3] != NullTerminator; ++path) {
+ if (path[i + 1] != Dot || path[i + 2] != Dot) {
+ continue;
+ }
+
+ const char c0 = path[i + 0];
+ const char c3 = path[i + 3];
+
+ if (c0 == AlternateDirectorySeparator &&
+ (c3 == DirectorySeparator || c3 == AlternateDirectorySeparator ||
+ c3 == NullTerminator)) {
+ return true;
+ }
+
+ if (c3 == AlternateDirectorySeparator &&
+ (c0 == DirectorySeparator || c0 == AlternateDirectorySeparator)) {
+ return true;
+ }
+ }
+
+ if (path[i + 0] == AlternateDirectorySeparator && path[i + 1] == Dot &&
+ path[i + 2] == Dot /* && path[i + 3] == NullTerminator */) {
+ return true;
+ }
+ }
+
+ return false;
+ }
+
+ static constexpr Result IsNormalized(bool* out, size_t* out_len, const char* path,
+ bool allow_all_characters = false) {
+ /* Use StringTraits names for remainder of scope. */
+ using namespace StringTraits;
+
+ /* Parse the path. */
+ auto state = PathState::Start;
+ size_t len = 0;
+ while (path[len] != NullTerminator) {
+ /* Get the current character. */
+ const char c = path[len++];
+
+ /* Check the current character is valid. */
+ if (!allow_all_characters && state != PathState::Start) {
+ R_UNLESS(!IsInvalidCharacter(c), ResultInvalidCharacter);
+ }
+
+ /* Process depending on current state. */
+ switch (state) {
+ /* Import the PathState enums for convenience. */
+ using enum PathState;
+
+ case Start:
+ R_UNLESS(c == DirectorySeparator, ResultInvalidPathFormat);
+ state = FirstSeparator;
+ break;
+ case Normal:
+ if (c == DirectorySeparator) {
+ state = Separator;
+ }
+ break;
+ case FirstSeparator:
+ case Separator:
+ if (c == DirectorySeparator) {
+ *out = false;
+ R_SUCCEED();
+ }
+
+ if (c == Dot) {
+ state = CurrentDir;
+ } else {
+ state = Normal;
+ }
+ break;
+ case CurrentDir:
+ if (c == DirectorySeparator) {
+ *out = false;
+ R_SUCCEED();
+ }
+
+ if (c == Dot) {
+ state = ParentDir;
+ } else {
+ state = Normal;
+ }
+ break;
+ case ParentDir:
+ if (c == DirectorySeparator) {
+ *out = false;
+ R_SUCCEED();
+ }
+
+ state = Normal;
+ break;
+ default:
+ UNREACHABLE();
+ break;
+ }
+ }
+
+ /* Check the final state. */
+ switch (state) {
+ /* Import the PathState enums for convenience. */
+ using enum PathState;
+ case Start:
+ R_THROW(ResultInvalidPathFormat);
+ case Normal:
+ case FirstSeparator:
+ *out = true;
+ break;
+ case Separator:
+ case CurrentDir:
+ case ParentDir:
+ *out = false;
+ break;
+ default:
+ UNREACHABLE();
+ break;
+ }
+
+ /* Set the output length. */
+ *out_len = len;
+ R_SUCCEED();
+ }
+
+ static Result Normalize(char* dst, size_t* out_len, const char* path, size_t max_out_size,
+ bool is_windows_path, bool is_drive_relative_path,
+ bool allow_all_characters = false) {
+ /* Use StringTraits names for remainder of scope. */
+ using namespace StringTraits;
+
+ /* Prepare to iterate. */
+ const char* cur_path = path;
+ size_t total_len = 0;
+
+ /* If path begins with a separator, check that we're not drive relative. */
+ if (cur_path[0] != DirectorySeparator) {
+ R_UNLESS(is_drive_relative_path, ResultInvalidPathFormat);
+
+ dst[total_len++] = DirectorySeparator;
+ }
+
+ /* We're going to need to do path replacement, potentially. */
+ char* replacement_path = nullptr;
+ size_t replacement_path_size = 0;
+
+ SCOPE_EXIT({
+ if (replacement_path != nullptr) {
+ if (std::is_constant_evaluated()) {
+ delete[] replacement_path;
+ } else {
+ Deallocate(replacement_path, replacement_path_size);
+ }
+ }
+ });
+
+ /* Perform path replacement, if necessary. */
+ if (IsParentDirectoryPathReplacementNeeded(cur_path)) {
+ if (std::is_constant_evaluated()) {
+ replacement_path_size = EntryNameLengthMax + 1;
+ replacement_path = new char[replacement_path_size];
+ } else {
+ replacement_path_size = EntryNameLengthMax + 1;
+ replacement_path = static_cast<char*>(Allocate(replacement_path_size));
+ }
+
+ ReplaceParentDirectoryPath(replacement_path, cur_path);
+
+ cur_path = replacement_path;
+ }
+
+ /* Iterate, normalizing path components. */
+ bool skip_next_sep = false;
+ size_t i = 0;
+
+ while (cur_path[i] != NullTerminator) {
+ /* Process a directory separator, if we run into one. */
+ if (cur_path[i] == DirectorySeparator) {
+ /* Swallow separators. */
+ do {
+ ++i;
+ } while (cur_path[i] == DirectorySeparator);
+
+ /* Check if we hit end of string. */
+ if (cur_path[i] == NullTerminator) {
+ break;
+ }
+
+ /* If we aren't skipping the separator, write it, checking that we remain in bounds.
+ */
+ if (!skip_next_sep) {
+ if (total_len + 1 == max_out_size) {
+ dst[total_len] = NullTerminator;
+ *out_len = total_len;
+ R_THROW(ResultTooLongPath);
+ }
+
+ dst[total_len++] = DirectorySeparator;
+ }
+
+ /* Don't skip the next separator. */
+ skip_next_sep = false;
+ }
+
+ /* Get the length of the current directory component. */
+ size_t dir_len = 0;
+ while (cur_path[i + dir_len] != DirectorySeparator &&
+ cur_path[i + dir_len] != NullTerminator) {
+ /* Check for validity. */
+ if (!allow_all_characters) {
+ R_UNLESS(!IsInvalidCharacter(cur_path[i + dir_len]), ResultInvalidCharacter);
+ }
+
+ ++dir_len;
+ }
+
+ /* Handle the current dir component. */
+ if (IsCurrentDirectory(cur_path + i)) {
+ skip_next_sep = true;
+ } else if (IsParentDirectory(cur_path + i)) {
+ /* We should have just written a separator. */
+ ASSERT(dst[total_len - 1] == DirectorySeparator);
+
+ /* We should have started with a separator, for non-windows paths. */
+ if (!is_windows_path) {
+ ASSERT(dst[0] == DirectorySeparator);
+ }
+
+ /* Remove the previous component. */
+ if (total_len == 1) {
+ R_UNLESS(is_windows_path, ResultDirectoryUnobtainable);
+
+ --total_len;
+ } else {
+ total_len -= 2;
+
+ do {
+ if (dst[total_len] == DirectorySeparator) {
+ break;
+ }
+ } while ((--total_len) != 0);
+ }
+
+ /* We should be pointing to a directory separator, for non-windows paths. */
+ if (!is_windows_path) {
+ ASSERT(dst[total_len] == DirectorySeparator);
+ }
+
+ /* We should remain in bounds. */
+ ASSERT(total_len < max_out_size);
+ } else {
+ /* Copy, possibly truncating. */
+ if (total_len + dir_len + 1 > max_out_size) {
+ const size_t copy_len = max_out_size - (total_len + 1);
+
+ for (size_t j = 0; j < copy_len; ++j) {
+ dst[total_len++] = cur_path[i + j];
+ }
+
+ dst[total_len] = NullTerminator;
+ *out_len = total_len;
+ R_THROW(ResultTooLongPath);
+ }
+
+ for (size_t j = 0; j < dir_len; ++j) {
+ dst[total_len++] = cur_path[i + j];
+ }
+ }
+
+ /* Advance past the current directory component. */
+ i += dir_len;
+ }
+
+ if (skip_next_sep) {
+ --total_len;
+ }
+
+ if (total_len == 0 && max_out_size != 0) {
+ total_len = 1;
+ dst[0] = DirectorySeparator;
+ }
+
+ /* NOTE: Probable nintendo bug, as max_out_size must be at least total_len + 1 for the null
+ * terminator. */
+ R_UNLESS(max_out_size >= total_len - 1, ResultTooLongPath);
+
+ dst[total_len] = NullTerminator;
+
+ /* Check that the result path is normalized. */
+ bool is_normalized;
+ size_t dummy;
+ R_TRY(IsNormalized(std::addressof(is_normalized), std::addressof(dummy), dst,
+ allow_all_characters));
+
+ /* Assert that the result path is normalized. */
+ ASSERT(is_normalized);
+
+ /* Set the output length. */
+ *out_len = total_len;
+ R_SUCCEED();
+ }
+};
+
+class PathFormatter {
+private:
+ static constexpr Result CheckSharedName(const char* name, size_t len) {
+ /* Use StringTraits names for remainder of scope. */
+ using namespace StringTraits;
+
+ if (len == 1) {
+ R_UNLESS(name[0] != Dot, ResultInvalidPathFormat);
+ } else if (len == 2) {
+ R_UNLESS(name[0] != Dot || name[1] != Dot, ResultInvalidPathFormat);
+ }
+
+ for (size_t i = 0; i < len; ++i) {
+ R_UNLESS(!IsInvalidCharacter(name[i]), ResultInvalidCharacter);
+ }
+
+ R_SUCCEED();
+ }
+
+ static constexpr Result CheckHostName(const char* name, size_t len) {
+ /* Use StringTraits names for remainder of scope. */
+ using namespace StringTraits;
+
+ if (len == 2) {
+ R_UNLESS(name[0] != Dot || name[1] != Dot, ResultInvalidPathFormat);
+ }
+
+ for (size_t i = 0; i < len; ++i) {
+ R_UNLESS(!IsInvalidCharacterForHostName(name[i]), ResultInvalidCharacter);
+ }
+
+ R_SUCCEED();
+ }
+
+ static constexpr Result CheckInvalidBackslash(bool* out_contains_backslash, const char* path,
+ bool allow_backslash) {
+ /* Use StringTraits names for remainder of scope. */
+ using namespace StringTraits;
+
+ /* Default to no backslashes, so we can just write if we see one. */
+ *out_contains_backslash = false;
+
+ while (*path != NullTerminator) {
+ if (*(path++) == AlternateDirectorySeparator) {
+ *out_contains_backslash = true;
+
+ R_UNLESS(allow_backslash, ResultInvalidCharacter);
+ }
+ }
+
+ R_SUCCEED();
+ }
+
+public:
+ static constexpr Result CheckPathFormat(const char* path, const PathFlags& flags) {
+ bool normalized;
+ size_t len;
+ R_RETURN(IsNormalized(std::addressof(normalized), std::addressof(len), path, flags));
+ }
+
+ static constexpr Result SkipMountName(const char** out, size_t* out_len, const char* path) {
+ R_RETURN(ParseMountName(out, out_len, nullptr, 0, path));
+ }
+
+ static constexpr Result ParseMountName(const char** out, size_t* out_len, char* out_mount_name,
+ size_t out_mount_name_buffer_size, const char* path) {
+ /* Check pre-conditions. */
+ ASSERT(path != nullptr);
+ ASSERT(out_len != nullptr);
+ ASSERT(out != nullptr);
+ ASSERT((out_mount_name == nullptr) == (out_mount_name_buffer_size == 0));
+
+ /* Use StringTraits names for remainder of scope. */
+ using namespace StringTraits;
+
+ /* Determine max mount length. */
+ const auto max_mount_len =
+ out_mount_name_buffer_size == 0
+ ? MountNameLengthMax + 1
+ : std::min(MountNameLengthMax + 1, out_mount_name_buffer_size);
+
+ /* Parse the path until we see a drive separator. */
+ size_t mount_len = 0;
+ for (/* ... */; mount_len < max_mount_len && path[mount_len]; ++mount_len) {
+ const char c = path[mount_len];
+
+ /* If we see a drive separator, advance, then we're done with the pre-drive separator
+ * part of the mount. */
+ if (c == DriveSeparator) {
+ ++mount_len;
+ break;
+ }
+
+ /* If we see a directory separator, we're not in a mount name. */
+ if (c == DirectorySeparator || c == AlternateDirectorySeparator) {
+ *out = path;
+ *out_len = 0;
+ R_SUCCEED();
+ }
+ }
+
+ /* Check to be sure we're actually looking at a mount name. */
+ if (mount_len <= 2 || path[mount_len - 1] != DriveSeparator) {
+ *out = path;
+ *out_len = 0;
+ R_SUCCEED();
+ }
+
+ /* Check that all characters in the mount name are allowable. */
+ for (size_t i = 0; i < mount_len; ++i) {
+ R_UNLESS(!IsInvalidCharacterForMountName(path[i]), ResultInvalidCharacter);
+ }
+
+ /* Copy out the mount name. */
+ if (out_mount_name_buffer_size > 0) {
+ R_UNLESS(mount_len < out_mount_name_buffer_size, ResultTooLongPath);
+
+ for (size_t i = 0; i < mount_len; ++i) {
+ out_mount_name[i] = path[i];
+ }
+ out_mount_name[mount_len] = NullTerminator;
+ }
+
+ /* Set the output. */
+ *out = path + mount_len;
+ *out_len = mount_len;
+ R_SUCCEED();
+ }
+
+ static constexpr Result SkipRelativeDotPath(const char** out, size_t* out_len,
+ const char* path) {
+ R_RETURN(ParseRelativeDotPath(out, out_len, nullptr, 0, path));
+ }
+
+ static constexpr Result ParseRelativeDotPath(const char** out, size_t* out_len,
+ char* out_relative,
+ size_t out_relative_buffer_size,
+ const char* path) {
+ /* Check pre-conditions. */
+ ASSERT(path != nullptr);
+ ASSERT(out_len != nullptr);
+ ASSERT(out != nullptr);
+ ASSERT((out_relative == nullptr) == (out_relative_buffer_size == 0));
+
+ /* Use StringTraits names for remainder of scope. */
+ using namespace StringTraits;
+
+ /* Initialize the output buffer, if we have one. */
+ if (out_relative_buffer_size > 0) {
+ out_relative[0] = NullTerminator;
+ }
+
+ /* Check if the path is relative. */
+ if (path[0] == Dot && (path[1] == NullTerminator || path[1] == DirectorySeparator ||
+ path[1] == AlternateDirectorySeparator)) {
+ if (out_relative_buffer_size > 0) {
+ R_UNLESS(out_relative_buffer_size >= 2, ResultTooLongPath);
+
+ out_relative[0] = Dot;
+ out_relative[1] = NullTerminator;
+ }
+
+ *out = path + 1;
+ *out_len = 1;
+ R_SUCCEED();
+ }
+
+ /* Ensure the path isn't a parent directory. */
+ R_UNLESS(!(path[0] == Dot && path[1] == Dot), ResultDirectoryUnobtainable);
+
+ /* There was no relative dot path. */
+ *out = path;
+ *out_len = 0;
+ R_SUCCEED();
+ }
+
+ static constexpr Result SkipWindowsPath(const char** out, size_t* out_len, bool* out_normalized,
+ const char* path, bool has_mount_name) {
+ /* We're normalized if and only if the parsing doesn't throw ResultNotNormalized(). */
+ *out_normalized = true;
+
+ R_TRY_CATCH(ParseWindowsPath(out, out_len, nullptr, 0, path, has_mount_name)) {
+ R_CATCH(ResultNotNormalized) {
+ *out_normalized = false;
+ }
+ }
+ R_END_TRY_CATCH;
+ ON_RESULT_INCLUDED(ResultNotNormalized) {
+ *out_normalized = false;
+ };
+
+ R_SUCCEED();
+ }
+
+ static constexpr Result ParseWindowsPath(const char** out, size_t* out_len, char* out_win,
+ size_t out_win_buffer_size, const char* path,
+ bool has_mount_name) {
+ /* Check pre-conditions. */
+ ASSERT(path != nullptr);
+ ASSERT(out_len != nullptr);
+ ASSERT(out != nullptr);
+ ASSERT((out_win == nullptr) == (out_win_buffer_size == 0));
+
+ /* Use StringTraits names for remainder of scope. */
+ using namespace StringTraits;
+
+ /* Initialize the output buffer, if we have one. */
+ if (out_win_buffer_size > 0) {
+ out_win[0] = NullTerminator;
+ }
+
+ /* Handle path start. */
+ const char* cur_path = path;
+ if (has_mount_name && path[0] == DirectorySeparator) {
+ if (path[1] == AlternateDirectorySeparator && path[2] == AlternateDirectorySeparator) {
+ R_UNLESS(out_win_buffer_size > 0, ResultNotNormalized);
+
+ ++cur_path;
+ } else if (IsWindowsDrive(path + 1)) {
+ R_UNLESS(out_win_buffer_size > 0, ResultNotNormalized);
+
+ ++cur_path;
+ }
+ }
+
+ /* Handle windows drive. */
+ if (IsWindowsDrive(cur_path)) {
+ /* Parse up to separator. */
+ size_t win_path_len = WindowsDriveLength;
+ for (/* ... */; cur_path[win_path_len] != NullTerminator; ++win_path_len) {
+ R_UNLESS(!IsInvalidCharacter(cur_path[win_path_len]), ResultInvalidCharacter);
+
+ if (cur_path[win_path_len] == DirectorySeparator ||
+ cur_path[win_path_len] == AlternateDirectorySeparator) {
+ break;
+ }
+ }
+
+ /* Ensure that we're normalized, if we're required to be. */
+ if (out_win_buffer_size == 0) {
+ for (size_t i = 0; i < win_path_len; ++i) {
+ R_UNLESS(cur_path[i] != AlternateDirectorySeparator, ResultNotNormalized);
+ }
+ } else {
+ /* Ensure we can copy into the normalized buffer. */
+ R_UNLESS(win_path_len < out_win_buffer_size, ResultTooLongPath);
+
+ for (size_t i = 0; i < win_path_len; ++i) {
+ out_win[i] = cur_path[i];
+ }
+ out_win[win_path_len] = NullTerminator;
+
+ Replace(out_win, win_path_len, AlternateDirectorySeparator, DirectorySeparator);
+ }
+
+ *out = cur_path + win_path_len;
+ *out_len = win_path_len;
+ R_SUCCEED();
+ }
+
+ /* Handle DOS device. */
+ if (IsDosDevicePath(cur_path)) {
+ size_t dos_prefix_len = DosDevicePathPrefixLength;
+
+ if (IsWindowsDrive(cur_path + dos_prefix_len)) {
+ dos_prefix_len += WindowsDriveLength;
+ } else {
+ --dos_prefix_len;
+ }
+
+ if (out_win_buffer_size > 0) {
+ /* Ensure we can copy into the normalized buffer. */
+ R_UNLESS(dos_prefix_len < out_win_buffer_size, ResultTooLongPath);
+
+ for (size_t i = 0; i < dos_prefix_len; ++i) {
+ out_win[i] = cur_path[i];
+ }
+ out_win[dos_prefix_len] = NullTerminator;
+
+ Replace(out_win, dos_prefix_len, DirectorySeparator, AlternateDirectorySeparator);
+ }
+
+ *out = cur_path + dos_prefix_len;
+ *out_len = dos_prefix_len;
+ R_SUCCEED();
+ }
+
+ /* Handle UNC path. */
+ if (IsUncPath(cur_path, false, true)) {
+ const char* final_path = cur_path;
+
+ R_UNLESS(cur_path[UncPathPrefixLength] != DirectorySeparator, ResultInvalidPathFormat);
+ R_UNLESS(cur_path[UncPathPrefixLength] != AlternateDirectorySeparator,
+ ResultInvalidPathFormat);
+
+ size_t cur_component_offset = 0;
+ size_t pos = UncPathPrefixLength;
+ for (/* ... */; cur_path[pos] != NullTerminator; ++pos) {
+ if (cur_path[pos] == DirectorySeparator ||
+ cur_path[pos] == AlternateDirectorySeparator) {
+ if (cur_component_offset != 0) {
+ R_TRY(CheckSharedName(cur_path + cur_component_offset,
+ pos - cur_component_offset));
+
+ final_path = cur_path + pos;
+ break;
+ }
+
+ R_UNLESS(cur_path[pos + 1] != DirectorySeparator, ResultInvalidPathFormat);
+ R_UNLESS(cur_path[pos + 1] != AlternateDirectorySeparator,
+ ResultInvalidPathFormat);
+
+ R_TRY(CheckHostName(cur_path + 2, pos - 2));
+
+ cur_component_offset = pos + 1;
+ }
+ }
+
+ R_UNLESS(cur_component_offset != pos, ResultInvalidPathFormat);
+
+ if (cur_component_offset != 0 && final_path == cur_path) {
+ R_TRY(CheckSharedName(cur_path + cur_component_offset, pos - cur_component_offset));
+
+ final_path = cur_path + pos;
+ }
+
+ size_t unc_prefix_len = final_path - cur_path;
+
+ /* Ensure that we're normalized, if we're required to be. */
+ if (out_win_buffer_size == 0) {
+ for (size_t i = 0; i < unc_prefix_len; ++i) {
+ R_UNLESS(cur_path[i] != DirectorySeparator, ResultNotNormalized);
+ }
+ } else {
+ /* Ensure we can copy into the normalized buffer. */
+ R_UNLESS(unc_prefix_len < out_win_buffer_size, ResultTooLongPath);
+
+ for (size_t i = 0; i < unc_prefix_len; ++i) {
+ out_win[i] = cur_path[i];
+ }
+ out_win[unc_prefix_len] = NullTerminator;
+
+ Replace(out_win, unc_prefix_len, DirectorySeparator, AlternateDirectorySeparator);
+ }
+
+ *out = cur_path + unc_prefix_len;
+ *out_len = unc_prefix_len;
+ R_SUCCEED();
+ }
+
+ /* There's no windows path to parse. */
+ *out = path;
+ *out_len = 0;
+ R_SUCCEED();
+ }
+
+ static constexpr Result IsNormalized(bool* out, size_t* out_len, const char* path,
+ const PathFlags& flags = {}) {
+ /* Ensure nothing is null. */
+ R_UNLESS(out != nullptr, ResultNullptrArgument);
+ R_UNLESS(out_len != nullptr, ResultNullptrArgument);
+ R_UNLESS(path != nullptr, ResultNullptrArgument);
+
+ /* Verify that the path is valid utf-8. */
+ R_TRY(CheckUtf8(path));
+
+ /* Use StringTraits names for remainder of scope. */
+ using namespace StringTraits;
+
+ /* Handle the case where the path is empty. */
+ if (path[0] == NullTerminator) {
+ R_UNLESS(flags.IsEmptyPathAllowed(), ResultInvalidPathFormat);
+
+ *out = true;
+ *out_len = 0;
+ R_SUCCEED();
+ }
+
+ /* All normalized paths start with a directory separator...unless they're windows paths,
+ * relative paths, or have mount names. */
+ if (path[0] != DirectorySeparator) {
+ R_UNLESS(flags.IsWindowsPathAllowed() || flags.IsRelativePathAllowed() ||
+ flags.IsMountNameAllowed(),
+ ResultInvalidPathFormat);
+ }
+
+ /* Check that the path is allowed to be a windows path, if it is. */
+ if (IsWindowsPath(path, false)) {
+ R_UNLESS(flags.IsWindowsPathAllowed(), ResultInvalidPathFormat);
+ }
+
+ /* Skip past the mount name, if one is present. */
+ size_t total_len = 0;
+ size_t mount_name_len = 0;
+ R_TRY(SkipMountName(std::addressof(path), std::addressof(mount_name_len), path));
+
+ /* If we had a mount name, check that that was allowed. */
+ if (mount_name_len > 0) {
+ R_UNLESS(flags.IsMountNameAllowed(), ResultInvalidPathFormat);
+
+ total_len += mount_name_len;
+ }
+
+ /* Check that the path starts as a normalized path should. */
+ if (path[0] != DirectorySeparator && !IsPathStartWithCurrentDirectory(path) &&
+ !IsWindowsPath(path, false)) {
+ R_UNLESS(flags.IsRelativePathAllowed(), ResultInvalidPathFormat);
+ R_UNLESS(!IsInvalidCharacter(path[0]), ResultInvalidPathFormat);
+
+ *out = false;
+ R_SUCCEED();
+ }
+
+ /* Process relative path. */
+ size_t relative_len = 0;
+ R_TRY(SkipRelativeDotPath(std::addressof(path), std::addressof(relative_len), path));
+
+ /* If we have a relative path, check that was allowed. */
+ if (relative_len > 0) {
+ R_UNLESS(flags.IsRelativePathAllowed(), ResultInvalidPathFormat);
+
+ total_len += relative_len;
+
+ if (path[0] == NullTerminator) {
+ *out = true;
+ *out_len = total_len;
+ R_SUCCEED();
+ }
+ }
+
+ /* Process windows path. */
+ size_t windows_len = 0;
+ bool normalized_win = false;
+ R_TRY(SkipWindowsPath(std::addressof(path), std::addressof(windows_len),
+ std::addressof(normalized_win), path, mount_name_len > 0));
+
+ /* If the windows path wasn't normalized, we're not normalized. */
+ if (!normalized_win) {
+ R_UNLESS(flags.IsWindowsPathAllowed(), ResultInvalidPathFormat);
+
+ *out = false;
+ R_SUCCEED();
+ }
+
+ /* If we had a windows path, check that was allowed. */
+ if (windows_len > 0) {
+ R_UNLESS(flags.IsWindowsPathAllowed(), ResultInvalidPathFormat);
+
+ total_len += windows_len;
+
+ /* We can't have both a relative path and a windows path. */
+ R_UNLESS(relative_len == 0, ResultInvalidPathFormat);
+
+ /* A path ending in a windows path isn't normalized. */
+ if (path[0] == NullTerminator) {
+ *out = false;
+ R_SUCCEED();
+ }
+
+ /* Check that there are no windows directory separators in the path. */
+ for (size_t i = 0; path[i] != NullTerminator; ++i) {
+ if (path[i] == AlternateDirectorySeparator) {
+ *out = false;
+ R_SUCCEED();
+ }
+ }
+ }
+
+ /* Check that parent directory replacement is not needed if backslashes are allowed. */
+ if (flags.IsBackslashAllowed() &&
+ PathNormalizer::IsParentDirectoryPathReplacementNeeded(path)) {
+ *out = false;
+ R_SUCCEED();
+ }
+
+ /* Check that the backslash state is valid. */
+ bool is_backslash_contained = false;
+ R_TRY(CheckInvalidBackslash(std::addressof(is_backslash_contained), path,
+ flags.IsWindowsPathAllowed() || flags.IsBackslashAllowed()));
+
+ /* Check that backslashes are contained only if allowed. */
+ if (is_backslash_contained && !flags.IsBackslashAllowed()) {
+ *out = false;
+ R_SUCCEED();
+ }
+
+ /* Check that the final result path is normalized. */
+ size_t normal_len = 0;
+ R_TRY(PathNormalizer::IsNormalized(out, std::addressof(normal_len), path,
+ flags.IsAllCharactersAllowed()));
+
+ /* Add the normal length. */
+ total_len += normal_len;
+
+ /* Set the output length. */
+ *out_len = total_len;
+ R_SUCCEED();
+ }
+
+ static Result Normalize(char* dst, size_t dst_size, const char* path, size_t path_len,
+ const PathFlags& flags) {
+ /* Use StringTraits names for remainder of scope. */
+ using namespace StringTraits;
+
+ /* Prepare to iterate. */
+ const char* src = path;
+ size_t cur_pos = 0;
+ bool is_windows_path = false;
+
+ /* Check if the path is empty. */
+ if (src[0] == NullTerminator) {
+ if (dst_size != 0) {
+ dst[0] = NullTerminator;
+ }
+
+ R_UNLESS(flags.IsEmptyPathAllowed(), ResultInvalidPathFormat);
+
+ R_SUCCEED();
+ }
+
+ /* Handle a mount name. */
+ size_t mount_name_len = 0;
+ if (flags.IsMountNameAllowed()) {
+ R_TRY(ParseMountName(std::addressof(src), std::addressof(mount_name_len), dst + cur_pos,
+ dst_size - cur_pos, src));
+
+ cur_pos += mount_name_len;
+ }
+
+ /* Handle a drive-relative prefix. */
+ bool is_drive_relative = false;
+ if (src[0] != DirectorySeparator && !IsPathStartWithCurrentDirectory(src) &&
+ !IsWindowsPath(src, false)) {
+ R_UNLESS(flags.IsRelativePathAllowed(), ResultInvalidPathFormat);
+ R_UNLESS(!IsInvalidCharacter(src[0]), ResultInvalidPathFormat);
+
+ dst[cur_pos++] = Dot;
+ is_drive_relative = true;
+ }
+
+ size_t relative_len = 0;
+ if (flags.IsRelativePathAllowed()) {
+ R_UNLESS(cur_pos < dst_size, ResultTooLongPath);
+
+ R_TRY(ParseRelativeDotPath(std::addressof(src), std::addressof(relative_len),
+ dst + cur_pos, dst_size - cur_pos, src));
+
+ cur_pos += relative_len;
+
+ if (src[0] == NullTerminator) {
+ R_UNLESS(cur_pos < dst_size, ResultTooLongPath);
+
+ dst[cur_pos] = NullTerminator;
+ R_SUCCEED();
+ }
+ }
+
+ /* Handle a windows path. */
+ if (flags.IsWindowsPathAllowed()) {
+ const char* const orig = src;
+
+ R_UNLESS(cur_pos < dst_size, ResultTooLongPath);
+
+ size_t windows_len = 0;
+ R_TRY(ParseWindowsPath(std::addressof(src), std::addressof(windows_len), dst + cur_pos,
+ dst_size - cur_pos, src, mount_name_len != 0));
+
+ cur_pos += windows_len;
+
+ if (src[0] == NullTerminator) {
+ /* NOTE: Bug in original code here repeated, should be checking cur_pos + 2. */
+ R_UNLESS(cur_pos + 1 < dst_size, ResultTooLongPath);
+
+ dst[cur_pos + 0] = DirectorySeparator;
+ dst[cur_pos + 1] = NullTerminator;
+ R_SUCCEED();
+ }
+
+ if ((src - orig) > 0) {
+ is_windows_path = true;
+ }
+ }
+
+ /* Check for invalid backslash. */
+ bool backslash_contained = false;
+ R_TRY(CheckInvalidBackslash(std::addressof(backslash_contained), src,
+ flags.IsWindowsPathAllowed() || flags.IsBackslashAllowed()));
+
+ /* Handle backslash replacement as necessary. */
+ if (backslash_contained && flags.IsWindowsPathAllowed()) {
+ /* Create a temporary buffer holding a slash-replaced version of the path. */
+ /* NOTE: Nintendo unnecessarily allocates and replaces here a fully copy of the path,
+ * despite having skipped some of it already. */
+ const size_t replaced_src_len = path_len - (src - path);
+
+ char* replaced_src = nullptr;
+ SCOPE_EXIT({
+ if (replaced_src != nullptr) {
+ if (std::is_constant_evaluated()) {
+ delete[] replaced_src;
+ } else {
+ Deallocate(replaced_src, replaced_src_len);
+ }
+ }
+ });
+
+ if (std::is_constant_evaluated()) {
+ replaced_src = new char[replaced_src_len];
+ } else {
+ replaced_src = static_cast<char*>(Allocate(replaced_src_len));
+ }
+
+ Strlcpy<char>(replaced_src, src, replaced_src_len);
+
+ Replace(replaced_src, replaced_src_len, AlternateDirectorySeparator,
+ DirectorySeparator);
+
+ size_t dummy;
+ R_TRY(PathNormalizer::Normalize(dst + cur_pos, std::addressof(dummy), replaced_src,
+ dst_size - cur_pos, is_windows_path, is_drive_relative,
+ flags.IsAllCharactersAllowed()));
+ } else {
+ /* We can just do normalization. */
+ size_t dummy;
+ R_TRY(PathNormalizer::Normalize(dst + cur_pos, std::addressof(dummy), src,
+ dst_size - cur_pos, is_windows_path, is_drive_relative,
+ flags.IsAllCharactersAllowed()));
+ }
+
+ R_SUCCEED();
+ }
+};
+
+} // namespace FileSys
diff --git a/src/core/file_sys/fs_string_util.h b/src/core/file_sys/fs_string_util.h
new file mode 100644
index 000000000..68114e72c
--- /dev/null
+++ b/src/core/file_sys/fs_string_util.h
@@ -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
diff --git a/src/core/hle/service/filesystem/fsp/fs_i_directory.cpp b/src/core/hle/service/filesystem/fsp/fs_i_directory.cpp
index 1e8ef366e..39690018b 100644
--- a/src/core/hle/service/filesystem/fsp/fs_i_directory.cpp
+++ b/src/core/hle/service/filesystem/fsp/fs_i_directory.cpp
@@ -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"
diff --git a/src/core/hle/service/filesystem/fsp/fs_i_directory.h b/src/core/hle/service/filesystem/fsp/fs_i_directory.h
index 9f5d7c054..793ecfcd7 100644
--- a/src/core/hle/service/filesystem/fsp/fs_i_directory.h
+++ b/src/core/hle/service/filesystem/fsp/fs_i_directory.h
@@ -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> {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 03:07:07 +0100