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fs: update + consolidate path normalization logic

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This commit is contained in:
Michael Scire 2020-12-06 19:56:45 -08:00
parent 5ef93778f6
commit 32803d9920
22 changed files with 1007 additions and 463 deletions
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1
libraries/libstratosphere/include/stratosphere/fs.hpp
View file

@ -40,7 +40,6 @@
#include <stratosphere/fs/fs_speed_emulation.hpp> #include <stratosphere/fs/fs_speed_emulation.hpp>
#include <stratosphere/fs/impl/fs_common_mount_name.hpp> #include <stratosphere/fs/impl/fs_common_mount_name.hpp>
#include <stratosphere/fs/fs_mount.hpp> #include <stratosphere/fs/fs_mount.hpp>
#include <stratosphere/fs/fs_path_tool.hpp>
#include <stratosphere/fs/fs_path_utils.hpp> #include <stratosphere/fs/fs_path_utils.hpp>
#include <stratosphere/fs/fs_filesystem_utils.hpp> #include <stratosphere/fs/fs_filesystem_utils.hpp>
#include <stratosphere/fs/fs_romfs_filesystem.hpp> #include <stratosphere/fs/fs_romfs_filesystem.hpp>

86
libraries/libstratosphere/include/stratosphere/fs/fs_path_tool.hpp
View file

@ -1,86 +0,0 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stratosphere/fs/fs_common.hpp>
#include <stratosphere/fssrv/sf/fssrv_sf_path.hpp>
namespace ams::fs {
namespace StringTraits {
constexpr inline char DirectorySeparator = '/';
constexpr inline char DriveSeparator = ':';
constexpr inline char Dot = '.';
constexpr inline char NullTerminator = '\x00';
constexpr inline char AlternateDirectorySeparator = '\\';
}
class PathTool {
public:
static constexpr const char RootPath[] = "/";
public:
static constexpr inline bool IsAlternateSeparator(char c) {
return c == StringTraits::AlternateDirectorySeparator;
}
static constexpr inline bool IsSeparator(char c) {
return c == StringTraits::DirectorySeparator;
}
static constexpr inline bool IsAnySeparator(char c) {
return IsSeparator(c) || IsAlternateSeparator(c);
}
static constexpr inline bool IsNullTerminator(char c) {
return c == StringTraits::NullTerminator;
}
static constexpr inline bool IsDot(char c) {
return c == StringTraits::Dot;
}
static constexpr inline bool IsWindowsDriveCharacter(char c) {
return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z');
}
static constexpr inline bool IsDriveSeparator(char c) {
return c == StringTraits::DriveSeparator;
}
static constexpr inline bool IsWindowsAbsolutePath(const char *p) {
return IsWindowsDriveCharacter(p[0]) && IsDriveSeparator(p[1]);
}
static constexpr inline bool IsUnc(const char *p) {
return (IsSeparator(p[0]) && IsSeparator(p[1])) || (IsAlternateSeparator(p[0]) && IsAlternateSeparator(p[1]));
}
static constexpr inline bool IsCurrentDirectory(const char *p) {
return IsDot(p[0]) && (IsSeparator(p[1]) || IsNullTerminator(p[1]));
}
static constexpr inline bool IsParentDirectory(const char *p) {
return IsDot(p[0]) && IsDot(p[1]) && (IsSeparator(p[2]) || IsNullTerminator(p[2]));
}
static Result Normalize(char *out, size_t *out_len, const char *src, size_t max_out_size, bool unc_preserved = false);
static Result IsNormalized(bool *out, const char *path);
static bool IsSubPath(const char *lhs, const char *rhs);
};
}

79
libraries/libstratosphere/include/stratosphere/fs/fs_path_utils.hpp
View file

@ -19,15 +19,59 @@
namespace ams::fs { namespace ams::fs {
namespace StringTraits {
constexpr inline char DirectorySeparator = '/';
constexpr inline char DriveSeparator = ':';
constexpr inline char Dot = '.';
constexpr inline char NullTerminator = '\x00';
constexpr inline char AlternateDirectorySeparator = '\\';
}
/* Windows path utilities. */
constexpr inline bool IsWindowsDrive(const char *path) {
AMS_ASSERT(path != nullptr);
const char c = path[0];
return (('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z')) && path[1] == StringTraits::DriveSeparator;
}
constexpr inline bool IsUnc(const char *path) {
return (path[0] == StringTraits::DirectorySeparator && path[1] == StringTraits::DirectorySeparator) ||
(path[0] == StringTraits::AlternateDirectorySeparator && path[1] == StringTraits::AlternateDirectorySeparator);
}
constexpr inline s64 GetWindowsPathSkipLength(const char *path) {
if (IsWindowsDrive(path)) {
return 2;
}
if (IsUnc(path)) {
for (s64 i = 2; path[i] != StringTraits::NullTerminator; ++i) {
if (path[i] == '$' || path[i] == ':') {
return i + 1;
}
}
}
return 0;
}
/* Path utilities. */
inline void Replace(char *dst, size_t dst_size, char old_char, char new_char) { inline void Replace(char *dst, size_t dst_size, char old_char, char new_char) {
for (char *cur = dst; cur < dst + dst_size && *cur != '\x00'; cur++) { AMS_ASSERT(dst != nullptr);
for (char *cur = dst; cur < dst + dst_size && *cur != StringTraits::NullTerminator; ++cur) {
if (*cur == old_char) { if (*cur == old_char) {
*cur = new_char; *cur = new_char;
} }
} }
} }
Result FspPathPrintf(fssrv::sf::FspPath *dst, const char *format, ...) __attribute__((format(printf, 2, 3)));
inline Result FspPathPrintf(fssrv::sf::FspPath *dst, const char *format, ...) { inline Result FspPathPrintf(fssrv::sf::FspPath *dst, const char *format, ...) {
AMS_ASSERT(dst != nullptr);
/* Format the path. */ /* Format the path. */
std::va_list va_list; std::va_list va_list;
va_start(va_list, format); va_start(va_list, format);
@ -43,6 +87,37 @@ namespace ams::fs {
return ResultSuccess(); return ResultSuccess();
} }
Result VerifyPath(const char *path, size_t max_path_len, size_t max_name_len); Result VerifyPath(const char *path, int max_path_len, int max_name_len);
bool IsSubPath(const char *lhs, const char *rhs);
/* Path normalization. */
class PathNormalizer {
public:
static constexpr const char RootPath[] = "/";
public:
static constexpr inline bool IsSeparator(char c) {
return c == StringTraits::DirectorySeparator;
}
static constexpr inline bool IsAnySeparator(char c) {
return c == StringTraits::DirectorySeparator || c == StringTraits::AlternateDirectorySeparator;
}
static constexpr inline bool IsNullTerminator(char c) {
return c == StringTraits::NullTerminator;
}
static constexpr inline bool IsCurrentDirectory(const char *p) {
return p[0] == StringTraits::Dot && (IsSeparator(p[1]) || IsNullTerminator(p[1]));
}
static constexpr inline bool IsParentDirectory(const char *p) {
return p[0] == StringTraits::Dot && p[1] == StringTraits::Dot && (IsSeparator(p[2]) || IsNullTerminator(p[2]));
}
static Result Normalize(char *out, size_t *out_len, const char *src, size_t max_out_size, bool unc_preserved = false, bool has_mount_name = false);
static Result IsNormalized(bool *out, const char *path, bool unc_preserved = false, bool has_mount_name = false);
};
} }

9
libraries/libstratosphere/include/stratosphere/fs/fs_remote_filesystem.hpp
View file

@ -20,7 +20,6 @@
#include <stratosphere/fs/fsa/fs_idirectory.hpp> #include <stratosphere/fs/fsa/fs_idirectory.hpp>
#include <stratosphere/fs/fsa/fs_ifilesystem.hpp> #include <stratosphere/fs/fsa/fs_ifilesystem.hpp>
#include <stratosphere/fs/fs_query_range.hpp> #include <stratosphere/fs/fs_query_range.hpp>
#include <stratosphere/fs/fs_path_tool.hpp>
#include <stratosphere/fs/fs_path_utils.hpp> #include <stratosphere/fs/fs_path_utils.hpp>
namespace ams::fs { namespace ams::fs {
@ -100,12 +99,12 @@ namespace ams::fs {
out_path->str[sizeof(out_path->str) - 1] = '\x00'; out_path->str[sizeof(out_path->str) - 1] = '\x00';
/* Replace directory separators. */ /* Replace directory separators. */
Replace(out_path->str, sizeof(out_path->str) - 1, StringTraits::AlternateDirectorySeparator, StringTraits::DirectorySeparator); fs::Replace(out_path->str, sizeof(out_path->str) - 1, StringTraits::AlternateDirectorySeparator, StringTraits::DirectorySeparator);
/* Get lengths. */ /* Get lengths. */
const auto mount_name_len = PathTool::IsWindowsAbsolutePath(path) ? 2 : 0; const auto skip_len = fs::GetWindowsPathSkipLength(path);
const auto rel_path = out_path->str + mount_name_len; const auto rel_path = out_path->str + skip_len;
const auto max_len = fs::EntryNameLengthMax - mount_name_len; const auto max_len = fs::EntryNameLengthMax - skip_len;
return VerifyPath(rel_path, max_len, max_len); return VerifyPath(rel_path, max_len, max_len);
} }
public: public:

11
libraries/libstratosphere/include/stratosphere/fssrv/fssrv_path_normalizer.hpp
View file

@ -31,7 +31,7 @@ namespace ams::fssrv {
Option_AcceptEmpty = BIT(4), Option_AcceptEmpty = BIT(4),
}; };
private: private:
using Buffer = std::unique_ptr<char[]>; using Buffer = std::unique_ptr<char[], fs::impl::Deleter>;
private: private:
Buffer buffer; Buffer buffer;
const char *path; const char *path;
@ -39,8 +39,9 @@ namespace ams::fssrv {
private: private:
static Result Normalize(const char **out_path, Buffer *out_buf, const char *path, bool preserve_unc, bool preserve_tail_sep, bool has_mount_name); static Result Normalize(const char **out_path, Buffer *out_buf, const char *path, bool preserve_unc, bool preserve_tail_sep, bool has_mount_name);
public: public:
/* TODO: Remove non-option constructor. */
explicit PathNormalizer(const char *p) : buffer(), path(nullptr), result(ResultSuccess()) { explicit PathNormalizer(const char *p) : buffer(), path(nullptr), result(ResultSuccess()) {
this->result = Normalize(&this->path, &this->buffer, p, false, false, false); this->result = Normalize(std::addressof(this->path), std::addressof(this->buffer), p, false, false, false);
} }
PathNormalizer(const char *p, u32 option) : buffer(), path(nullptr), result(ResultSuccess()) { PathNormalizer(const char *p, u32 option) : buffer(), path(nullptr), result(ResultSuccess()) {
@ -50,15 +51,15 @@ namespace ams::fssrv {
const bool preserve_unc = (option & Option_PreserveUnc); const bool preserve_unc = (option & Option_PreserveUnc);
const bool preserve_tail_sep = (option & Option_PreserveTailSeparator); const bool preserve_tail_sep = (option & Option_PreserveTailSeparator);
const bool has_mount_name = (option & Option_HasMountName); const bool has_mount_name = (option & Option_HasMountName);
this->result = Normalize(&this->path, &this->buffer, p, preserve_unc, preserve_tail_sep, has_mount_name); this->result = Normalize(std::addressof(this->path), std::addressof(this->buffer), p, preserve_unc, preserve_tail_sep, has_mount_name);
} }
} }
inline Result GetResult() const { Result GetResult() const {
return this->result; return this->result;
} }
inline const char * GetPath() const { const char *GetPath() const {
return this->path; return this->path;
} }
}; };

1
libraries/libstratosphere/include/stratosphere/fssystem.hpp
View file

@ -21,7 +21,6 @@
#include <stratosphere/fssystem/fssystem_external_code.hpp> #include <stratosphere/fssystem/fssystem_external_code.hpp>
#include <stratosphere/fssystem/fssystem_partition_file_system.hpp> #include <stratosphere/fssystem/fssystem_partition_file_system.hpp>
#include <stratosphere/fssystem/fssystem_partition_file_system_meta.hpp> #include <stratosphere/fssystem/fssystem_partition_file_system_meta.hpp>
#include <stratosphere/fssystem/fssystem_path_tool.hpp>
#include <stratosphere/fssystem/fssystem_thread_priority_changer.hpp> #include <stratosphere/fssystem/fssystem_thread_priority_changer.hpp>
#include <stratosphere/fssystem/fssystem_aes_ctr_storage.hpp> #include <stratosphere/fssystem/fssystem_aes_ctr_storage.hpp>
#include <stratosphere/fssystem/fssystem_aes_xts_storage.hpp> #include <stratosphere/fssystem/fssystem_aes_xts_storage.hpp>

20
libraries/libstratosphere/include/stratosphere/fssystem/fssystem_utility.hpp
View file

@ -14,11 +14,11 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>. * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/ */
#pragma once #pragma once
#include "../fs/fs_common.hpp" #include <stratosphere/fs/fs_common.hpp>
#include "../fs/fs_file.hpp" #include <stratosphere/fs/fs_file.hpp>
#include "../fs/fs_directory.hpp" #include <stratosphere/fs/fs_directory.hpp>
#include "../fs/fs_filesystem.hpp" #include <stratosphere/fs/fs_filesystem.hpp>
#include "fssystem_path_tool.hpp" #include <stratosphere/fs/fs_path_utils.hpp>
namespace ams::fssystem { namespace ams::fssystem {
@ -70,7 +70,7 @@ namespace ams::fssystem {
} }
/* Restore parent path. */ /* Restore parent path. */
work_path[parent_len] = StringTraits::NullTerminator; work_path[parent_len] = fs::StringTraits::NullTerminator;
} }
return ResultSuccess(); return ResultSuccess();
@ -91,13 +91,13 @@ namespace ams::fssystem {
/* Copy root path in, add a / if necessary. */ /* Copy root path in, add a / if necessary. */
std::memcpy(work_path, root_path, root_path_len); std::memcpy(work_path, root_path, root_path_len);
if (!PathTool::IsSeparator(work_path[root_path_len - 1])) { if (!fs::PathNormalizer::IsSeparator(work_path[root_path_len - 1])) {
work_path[root_path_len++] = StringTraits::DirectorySeparator; work_path[root_path_len++] = fs::StringTraits::DirectorySeparator;
} }
/* Make sure the result path is still valid. */ /* Make sure the result path is still valid. */
R_UNLESS(root_path_len <= fs::EntryNameLengthMax, fs::ResultTooLongPath()); R_UNLESS(root_path_len <= fs::EntryNameLengthMax, fs::ResultTooLongPath());
work_path[root_path_len] = StringTraits::NullTerminator; work_path[root_path_len] = fs::StringTraits::NullTerminator;
return impl::IterateDirectoryRecursivelyImpl(fs, work_path, work_path_size, dir_ent_buf, on_enter_dir, on_exit_dir, on_file); return impl::IterateDirectoryRecursivelyImpl(fs, work_path, work_path_size, dir_ent_buf, on_enter_dir, on_exit_dir, on_file);
} }
@ -111,7 +111,7 @@ namespace ams::fssystem {
template<typename OnEnterDir, typename OnExitDir, typename OnFile> template<typename OnEnterDir, typename OnExitDir, typename OnFile>
Result IterateDirectoryRecursively(fs::fsa::IFileSystem *fs, OnEnterDir on_enter_dir, OnExitDir on_exit_dir, OnFile on_file) { Result IterateDirectoryRecursively(fs::fsa::IFileSystem *fs, OnEnterDir on_enter_dir, OnExitDir on_exit_dir, OnFile on_file) {
return IterateDirectoryRecursively(fs, PathTool::RootPath, on_enter_dir, on_exit_dir, on_file); return IterateDirectoryRecursively(fs, fs::PathNormalizer::RootPath, on_enter_dir, on_exit_dir, on_file);
} }
/* TODO: Cleanup API */ /* TODO: Cleanup API */

2
libraries/libstratosphere/source/fs/fs_bis.cpp
View file

@ -72,7 +72,7 @@ namespace ams::fs {
fssrv::sf::Path sf_path; fssrv::sf::Path sf_path;
if (len > 0) { if (len > 0) {
const bool ending_sep = PathTool::IsSeparator(root_path[len - 1]); const bool ending_sep = PathNormalizer::IsSeparator(root_path[len - 1]);
FspPathPrintf(std::addressof(sf_path), "%s%s", root_path, ending_sep ? "" : "/"); FspPathPrintf(std::addressof(sf_path), "%s%s", root_path, ending_sep ? "" : "/");
} else { } else {
sf_path.str[0] = '\x00'; sf_path.str[0] = '\x00';

569
libraries/libstratosphere/source/fs/fs_path_normalizer.cpp Normal file
View file

@ -0,0 +1,569 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
namespace ams::fs {
namespace {
Result CheckSharedName(const char *path, int len) {
if (len == 1) {
R_UNLESS(path[0] != StringTraits::Dot, fs::ResultInvalidPathFormat());
} else if (len == 2) {
R_UNLESS(path[0] != StringTraits::Dot || path[1] != StringTraits::Dot, fs::ResultInvalidPathFormat());
}
return ResultSuccess();
}
Result ParseWindowsPath(const char **out_path, char *out, size_t *out_windows_path_len, bool *out_normalized, const char *path, size_t max_out_size, bool has_mount_name) {
/* Prepare to parse. */
const char * const path_start = path;
if (out_normalized != nullptr) {
*out_normalized = true;
}
/* Handle start of path. */
bool skipped_mount = false;
auto prefix_len = 0;
if (has_mount_name) {
if (PathNormalizer::IsSeparator(path[0]) && path[1] == StringTraits::AlternateDirectorySeparator && path[2] == StringTraits::AlternateDirectorySeparator) {
path += 1;
prefix_len = 1;
} else {
/* Advance past separators. */
while (PathNormalizer::IsSeparator(path[0])) {
++path;
}
if (path != path_start) {
if (path - path_start == 1 || IsWindowsDrive(path)) {
prefix_len = 1;
} else {
if (path - path_start > 2 && out_normalized != nullptr) {
*out_normalized = false;
return ResultSuccess();
}
path -= 2;
skipped_mount = true;
}
}
}
} else if (PathNormalizer::IsSeparator(path[0]) && !IsUnc(path)) {
path += 1;
prefix_len = 1;
}
/* Parse the path. */
const char *trimmed_path = path_start;
if (IsWindowsDrive(path)) {
/* Find the first separator. */
int i;
for (i = 2; !PathNormalizer::IsNullTerminator(path[i]); ++i) {
if (PathNormalizer::IsAnySeparator(path[i])) {
break;
}
}
trimmed_path = path + i;
const size_t win_path_len = trimmed_path - path_start;
if (out != nullptr) {
R_UNLESS(win_path_len <= max_out_size, fs::ResultTooLongPath());
std::memcpy(out, path_start, win_path_len);
}
*out_path = trimmed_path;
*out_windows_path_len = win_path_len;
} else if (IsUnc(path)) {
if (PathNormalizer::IsAnySeparator(path[2])) {
AMS_ASSERT(!has_mount_name);
return fs::ResultInvalidPathFormat();
}
int cur_part_ofs = 0;
bool needs_sep_fix = false;
for (auto i = 2; !PathNormalizer::IsNullTerminator(path[i]); ++i) {
if (cur_part_ofs == 0 && path[i] == StringTraits::AlternateDirectorySeparator) {
needs_sep_fix = true;
if (out_normalized != nullptr) {
*out_normalized = false;
return ResultSuccess();
}
}
if (PathNormalizer::IsAnySeparator(path[i])) {
if (path[i] == StringTraits::AlternateDirectorySeparator) {
needs_sep_fix = true;
}
if (cur_part_ofs != 0) {
break;
}
R_UNLESS(!PathNormalizer::IsSeparator(path[i + 1]), fs::ResultInvalidPathFormat());
R_TRY(CheckSharedName(path + 2, i - 2));
cur_part_ofs = i + 1;
}
if (path[i] == '$' || path[i] == StringTraits::DriveSeparator) {
R_UNLESS(cur_part_ofs != 0, fs::ResultInvalidCharacter());
R_UNLESS(PathNormalizer::IsAnySeparator(path[i + 1]) || PathNormalizer::IsNullTerminator(path[i + 1]), fs::ResultInvalidPathFormat());
trimmed_path = path + i + 1;
break;
}
}
if (trimmed_path == path_start) {
int tr_part_ofs = 0;
int i;
for (i = 2; !PathNormalizer::IsNullTerminator(path[i]); ++i) {
if (PathNormalizer::IsAnySeparator(path[i])) {
if (tr_part_ofs != 0) {
R_TRY(CheckSharedName(path + tr_part_ofs, i - tr_part_ofs));
trimmed_path = path + i;
break;
}
R_UNLESS(!PathNormalizer::IsSeparator(path[i + 1]), fs::ResultInvalidPathFormat());
R_TRY(CheckSharedName(path + 2, i - 2));
cur_part_ofs = i + 1;
}
}
if (tr_part_ofs != 0 && trimmed_path == path_start) {
R_TRY(CheckSharedName(path + tr_part_ofs, i - tr_part_ofs));
trimmed_path = path + i;
}
}
const size_t win_path_len = trimmed_path - path;
const bool prepend_sep = prefix_len != 0 || skipped_mount;
if (out != nullptr) {
R_UNLESS(win_path_len <= max_out_size, fs::ResultTooLongPath());
if (prepend_sep) {
*(out++) = StringTraits::DirectorySeparator;
}
std::memcpy(out, path, win_path_len);
out[0] = StringTraits::AlternateDirectorySeparator;
out[1] = StringTraits::AlternateDirectorySeparator;
if (needs_sep_fix) {
for (size_t i = 2; i < win_path_len; ++i) {
if (PathNormalizer::IsSeparator(out[i])) {
out[i] = StringTraits::AlternateDirectorySeparator;
}
}
}
}
*out_path = trimmed_path;
*out_windows_path_len = win_path_len + (prepend_sep ? 1 : 0);
} else {
*out_path = trimmed_path;
}
return ResultSuccess();
}
Result SkipWindowsPath(const char **out_path, bool *out_normalized, const char *path, bool has_mount_name) {
size_t windows_path_len;
return ParseWindowsPath(out_path, nullptr, std::addressof(windows_path_len), out_normalized, path, 0, has_mount_name);
}
Result ParseMountName(const char **out_path, char *out, size_t *out_mount_name_len, const char *path, size_t max_out_size) {
/* Decide on a start. */
const char *start = PathNormalizer::IsSeparator(path[0]) ? path + 1 : path;
/* Find the end of the mount name. */
const char *cur;
for (cur = start; cur < start + MountNameLengthMax + 1; ++cur) {
if (*cur == StringTraits::DriveSeparator) {
++cur;
break;
}
if (PathNormalizer::IsSeparator(*cur)) {
*out_path = path;
*out_mount_name_len = 0;
return ResultSuccess();
}
}
R_UNLESS(start < cur - 1, fs::ResultInvalidPathFormat());
R_UNLESS(cur[-1] == StringTraits::DriveSeparator, fs::ResultInvalidPathFormat());
/* Check the mount name doesn't contain a dot. */
if (cur != start) {
for (const char *p = start; p < cur; ++p) {
R_UNLESS(*p != StringTraits::Dot, fs::ResultInvalidCharacter());
}
}
const size_t mount_name_len = cur - path;
if (out != nullptr) {
R_UNLESS(mount_name_len <= max_out_size, fs::ResultTooLongPath());
std::memcpy(out, path, mount_name_len);
}
*out_path = cur;
*out_mount_name_len = mount_name_len;
return ResultSuccess();
}
Result SkipMountName(const char **out_path, const char *path) {
size_t mount_name_len;
return ParseMountName(out_path, nullptr, std::addressof(mount_name_len), path, 0);
}
bool IsParentDirectoryPathReplacementNeeded(const char *path) {
if (!PathNormalizer::IsAnySeparator(path[0])) {
return false;
}
for (auto i = 0; !PathNormalizer::IsNullTerminator(path[i]); ++i) {
if (path[i + 0] == StringTraits::AlternateDirectorySeparator &&
path[i + 1] == StringTraits::Dot &&
path[i + 2] == StringTraits::Dot &&
(PathNormalizer::IsAnySeparator(path[i + 3]) || PathNormalizer::IsNullTerminator(path[i + 3])))
{
return true;
}
if (PathNormalizer::IsAnySeparator(path[i + 0]) &&
path[i + 1] == StringTraits::Dot &&
path[i + 2] == StringTraits::Dot &&
path[i + 3] == StringTraits::AlternateDirectorySeparator)
{
return true;
}
}
return false;
}
void ReplaceParentDirectoryPath(char *dst, const char *src) {
dst[0] = StringTraits::DirectorySeparator;
int i = 1;
while (!PathNormalizer::IsNullTerminator(src[i])) {
if (PathNormalizer::IsAnySeparator(src[i - 1]) &&
src[i + 0] == StringTraits::Dot &&
src[i + 1] == StringTraits::Dot &&
PathNormalizer::IsAnySeparator(src[i + 2]))
{
dst[i - 1] = StringTraits::DirectorySeparator;
dst[i + 0] = StringTraits::Dot;
dst[i + 1] = StringTraits::Dot;
dst[i - 2] = StringTraits::DirectorySeparator;
i += 3;
} else {
if (src[i - 1] == StringTraits::AlternateDirectorySeparator &&
src[i + 0] == StringTraits::Dot &&
src[i + 1] == StringTraits::Dot &&
PathNormalizer::IsNullTerminator(src[i + 2]))
{
dst[i - 1] = StringTraits::DirectorySeparator;
dst[i + 0] = StringTraits::Dot;
dst[i + 1] = StringTraits::Dot;
i += 2;
break;
}
dst[i] = src[i];
++i;
}
}
dst[i] = StringTraits::NullTerminator;
}
}
Result PathNormalizer::Normalize(char *out, size_t *out_len, const char *path, size_t max_out_size, bool unc_preserved, bool has_mount_name) {
/* Check pre-conditions. */
AMS_ASSERT(out != nullptr);
AMS_ASSERT(out_len != nullptr);
AMS_ASSERT(path != nullptr);
/* If we should, handle the mount name. */
size_t prefix_len = 0;
if (has_mount_name) {
size_t mount_name_len = 0;
R_TRY(ParseMountName(std::addressof(path), out, std::addressof(mount_name_len), path, max_out_size));
prefix_len += mount_name_len;
}
/* Deal with unc. */
bool is_unc_path = false;
if (unc_preserved) {
const char * const path_start = path;
size_t windows_path_len = 0;
R_TRY(ParseWindowsPath(std::addressof(path), out + prefix_len, std::addressof(windows_path_len), nullptr, path, max_out_size, has_mount_name));
prefix_len += windows_path_len;
is_unc_path = path != path_start;
}
/* Paths must start with / */
R_UNLESS(prefix_len != 0 || IsSeparator(path[0]), fs::ResultInvalidPathFormat());
/* Check if parent directory path replacement is needed. */
std::unique_ptr<char[], fs::impl::Deleter> replacement_path;
if (IsParentDirectoryPathReplacementNeeded(path)) {
/* Allocate a buffer to hold the replacement path. */
replacement_path = fs::impl::MakeUnique<char[]>(EntryNameLengthMax + 1);
R_UNLESS(replacement_path != nullptr, fs::ResultAllocationFailureInNew());
/* Replace the path. */
ReplaceParentDirectoryPath(replacement_path.get(), path);
/* Set path to be the replacement path. */
path = replacement_path.get();
}
bool skip_next_sep = false;
size_t i = 0;
size_t len = prefix_len;
while (!IsNullTerminator(path[i])) {
if (IsSeparator(path[i])) {
/* Swallow separators. */
while (IsSeparator(path[++i])) { }
if (IsNullTerminator(path[i])) {
break;
}
/* Handle skip if needed */
if (!skip_next_sep) {
if (len + 1 == max_out_size) {
out[len] = StringTraits::NullTerminator;
*out_len = len;
return fs::ResultTooLongPath();
}
out[len++] = StringTraits::DirectorySeparator;
}
skip_next_sep = false;
}
/* See length of current dir. */
size_t dir_len = 0;
while (!IsSeparator(path[i + dir_len]) && !IsNullTerminator(path[i + dir_len])) {
++dir_len;
}
if (IsCurrentDirectory(path + i)) {
skip_next_sep = true;
} else if (IsParentDirectory(path + i)) {
AMS_ASSERT(IsSeparator(out[len - 1]));
if (!is_unc_path) {
AMS_ASSERT(IsSeparator(out[prefix_len]));
}
/* Walk up a directory. */
if (len == prefix_len + 1) {
R_UNLESS(is_unc_path, fs::ResultDirectoryUnobtainable());
--len;
} else {
len -= 2;
do {
if (IsSeparator(out[len])) {
break;
}
--len;
} while (len != prefix_len);
}
if (!is_unc_path) {
AMS_ASSERT(IsSeparator(out[prefix_len]));
}
AMS_ASSERT(len < max_out_size);
} else {
/* Copy, possibly truncating. */
if (len + dir_len + 1 <= max_out_size) {
for (size_t j = 0; j < dir_len; ++j) {
out[len++] = path[i+j];
}
} else {
const size_t copy_len = max_out_size - 1 - len;
for (size_t j = 0; j < copy_len; ++j) {
out[len++] = path[i+j];
}
out[len] = StringTraits::NullTerminator;
*out_len = len;
return fs::ResultTooLongPath();
}
}
i += dir_len;
}
if (skip_next_sep) {
--len;
}
if (!is_unc_path && len == prefix_len && max_out_size > len) {
out[len++] = StringTraits::DirectorySeparator;
}
R_UNLESS(max_out_size >= len - 1, fs::ResultTooLongPath());
/* Null terminate. */
out[len] = StringTraits::NullTerminator;
*out_len = len;
/* Assert normalized. */
{
bool normalized = false;
const auto is_norm_result = IsNormalized(std::addressof(normalized), out, unc_preserved, has_mount_name);
AMS_ASSERT(R_SUCCEEDED(is_norm_result));
AMS_ASSERT(normalized);
}
return ResultSuccess();
}
Result PathNormalizer::IsNormalized(bool *out, const char *path, bool unc_preserved, bool has_mount_name) {
AMS_ASSERT(out != nullptr);
AMS_ASSERT(path != nullptr);
/* Save the start of the path. */
const char *path_start = path;
/* If we should, skip the mount name. */
if (has_mount_name) {
R_TRY(SkipMountName(std::addressof(path), path));
R_UNLESS(IsSeparator(*path), fs::ResultInvalidPathFormat());
}
/* If we should, handle unc. */
bool is_unc_path = false;
if (unc_preserved) {
path_start = path;
/* Skip the windows path. */
bool normalized_windows = false;
R_TRY(SkipWindowsPath(std::addressof(path), std::addressof(normalized_windows), path, has_mount_name));
/* If we're not windows-normalized, we're not normalized. */
if (!normalized_windows) {
*out = false;
return ResultSuccess();
}
/* Handle the case where we're dealing with a unc path. */
if (path != path_start) {
is_unc_path = true;
if (IsSeparator(path_start[0]) && IsSeparator(path_start[1])) {
*out = false;
return ResultSuccess();
}
if (IsNullTerminator(path[0])) {
*out = true;
return ResultSuccess();
}
}
}
/* Check if parent directory path replacement is needed. */
if (IsParentDirectoryPathReplacementNeeded(path)) {
*out = false;
return ResultSuccess();
}
/* Nintendo uses a state machine here. */
enum class PathState {
Start,
Normal,
FirstSeparator,
Separator,
CurrentDir,
ParentDir,
};
PathState state = PathState::Start;
for (const char *cur = path; *cur != StringTraits::NullTerminator; ++cur) {
const char c = *cur;
switch (state) {
case PathState::Start:
if (IsSeparator(c)) {
state = PathState::FirstSeparator;
} else {
R_UNLESS(path != path_start, fs::ResultInvalidPathFormat());
if (c == StringTraits::Dot) {
state = PathState::CurrentDir;
} else {
state = PathState::Normal;
}
}
break;
case PathState::Normal:
if (IsSeparator(c)) {
state = PathState::Separator;
}
break;
case PathState::FirstSeparator:
case PathState::Separator:
if (IsSeparator(c)) {
*out = false;
return ResultSuccess();
} else if (c == StringTraits::Dot) {
state = PathState::CurrentDir;
} else {
state = PathState::Normal;
}
break;
case PathState::CurrentDir:
if (IsSeparator(c)) {
*out = false;
return ResultSuccess();
} else if (c == StringTraits::Dot) {
state = PathState::ParentDir;
} else {
state = PathState::Normal;
}
break;
case PathState::ParentDir:
if (IsSeparator(c)) {
*out = false;
return ResultSuccess();
} else {
state = PathState::Normal;
}
break;
AMS_UNREACHABLE_DEFAULT_CASE();
}
}
switch (state) {
case PathState::Start:
return fs::ResultInvalidPathFormat();
case PathState::Normal:
*out = true;
break;
case PathState::FirstSeparator:
*out = !is_unc_path;
break;
case PathState::CurrentDir:
case PathState::ParentDir:
case PathState::Separator:
*out = false;
break;
AMS_UNREACHABLE_DEFAULT_CASE();
}
return ResultSuccess();
}
}

248
libraries/libstratosphere/source/fs/fs_path_tool.cpp
View file

@ -1,248 +0,0 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
namespace ams::fs {
Result PathTool::Normalize(char *out, size_t *out_len, const char *src, size_t max_out_size, bool unc_preserved) {
/* Paths must start with / */
R_UNLESS(IsSeparator(src[0]), fs::ResultInvalidPathFormat());
bool skip_next_sep = false;
size_t i = 0;
size_t len = 0;
while (!IsNullTerminator(src[i])) {
if (IsSeparator(src[i])) {
/* Swallow separators. */
while (IsSeparator(src[++i])) { }
if (IsNullTerminator(src[i])) {
break;
}
/* Handle skip if needed */
if (!skip_next_sep) {
if (len + 1 == max_out_size) {
out[len] = StringTraits::NullTerminator;
if (out_len != nullptr) {
*out_len = len;
}
return fs::ResultTooLongPath();
}
out[len++] = StringTraits::DirectorySeparator;
if (unc_preserved && len == 1) {
while (len < i) {
if (len + 1 == max_out_size) {
out[len] = StringTraits::NullTerminator;
if (out_len != nullptr) {
*out_len = len;
}
return fs::ResultTooLongPath();
}
out[len++] = StringTraits::DirectorySeparator;
}
}
}
skip_next_sep = false;
}
/* See length of current dir. */
size_t dir_len = 0;
while (!IsSeparator(src[i+dir_len]) && !IsNullTerminator(src[i+dir_len])) {
dir_len++;
}
if (IsCurrentDirectory(&src[i])) {
skip_next_sep = true;
} else if (IsParentDirectory(&src[i])) {
AMS_ABORT_UNLESS(IsSeparator(out[0]));
AMS_ABORT_UNLESS(IsSeparator(out[len - 1]));
R_UNLESS(len != 1, fs::ResultDirectoryUnobtainable());
/* Walk up a directory. */
len -= 2;
while (!IsSeparator(out[len])) {
len--;
}
} else {
/* Copy, possibly truncating. */
if (len + dir_len + 1 <= max_out_size) {
for (size_t j = 0; j < dir_len; j++) {
out[len++] = src[i+j];
}
} else {
const size_t copy_len = max_out_size - 1 - len;
for (size_t j = 0; j < copy_len; j++) {
out[len++] = src[i+j];
}
out[len] = StringTraits::NullTerminator;
if (out_len != nullptr) {
*out_len = len;
}
return fs::ResultTooLongPath();
}
}
i += dir_len;
}
if (skip_next_sep) {
len--;
}
if (len == 0 && max_out_size) {
out[len++] = StringTraits::DirectorySeparator;
}
R_UNLESS(max_out_size >= len - 1, fs::ResultTooLongPath());
/* Null terminate. */
out[len] = StringTraits::NullTerminator;
if (out_len != nullptr) {
*out_len = len;
}
/* Assert normalized. */
bool normalized = false;
AMS_ABORT_UNLESS(unc_preserved || (R_SUCCEEDED(IsNormalized(&normalized, out)) && normalized));
return ResultSuccess();
}
Result PathTool::IsNormalized(bool *out, const char *path) {
/* Nintendo uses a state machine here. */
enum class PathState {
Start,
Normal,
FirstSeparator,
Separator,
CurrentDir,
ParentDir,
WindowsDriveLetter,
};
PathState state = PathState::Start;
for (const char *cur = path; *cur != StringTraits::NullTerminator; cur++) {
const char c = *cur;
switch (state) {
case PathState::Start:
if (IsWindowsDriveCharacter(c)) {
state = PathState::WindowsDriveLetter;
} else if (IsSeparator(c)) {
state = PathState::FirstSeparator;
} else {
return fs::ResultInvalidPathFormat();
}
break;
case PathState::Normal:
if (IsSeparator(c)) {
state = PathState::Separator;
}
break;
case PathState::FirstSeparator:
case PathState::Separator:
if (IsSeparator(c)) {
*out = false;
return ResultSuccess();
} else if (IsDot(c)) {
state = PathState::CurrentDir;
} else {
state = PathState::Normal;
}
break;
case PathState::CurrentDir:
if (IsSeparator(c)) {
*out = false;
return ResultSuccess();
} else if (IsDot(c)) {
state = PathState::ParentDir;
} else {
state = PathState::Normal;
}
break;
case PathState::ParentDir:
if (IsSeparator(c)) {
*out = false;
return ResultSuccess();
} else {
state = PathState::Normal;
}
break;
case PathState::WindowsDriveLetter:
if (IsDriveSeparator(c)) {
*out = true;
return ResultSuccess();
} else {
return fs::ResultInvalidPathFormat();
}
break;
}
}
switch (state) {
case PathState::Start:
case PathState::WindowsDriveLetter:
return fs::ResultInvalidPathFormat();
case PathState::FirstSeparator:
case PathState::Normal:
*out = true;
break;
case PathState::CurrentDir:
case PathState::ParentDir:
case PathState::Separator:
*out = false;
break;
AMS_UNREACHABLE_DEFAULT_CASE();
}
return ResultSuccess();
}
bool PathTool::IsSubPath(const char *lhs, const char *rhs) {
AMS_ABORT_UNLESS(lhs != nullptr);
AMS_ABORT_UNLESS(rhs != nullptr);
/* Special case certain paths. */
if (IsSeparator(lhs[0]) && !IsSeparator(lhs[1]) && IsSeparator(rhs[0]) && IsSeparator(rhs[1])) {
return false;
}
if (IsSeparator(rhs[0]) && !IsSeparator(rhs[1]) && IsSeparator(lhs[0]) && IsSeparator(lhs[1])) {
return false;
}
if (IsSeparator(lhs[0]) && IsNullTerminator(lhs[1]) && IsSeparator(rhs[0]) && !IsNullTerminator(rhs[1])) {
return true;
}
if (IsSeparator(rhs[0]) && IsNullTerminator(rhs[1]) && IsSeparator(lhs[0]) && !IsNullTerminator(lhs[1])) {
return true;
}
/* Check subpath. */
for (size_t i = 0; /* No terminating condition */; i++) {
if (IsNullTerminator(lhs[i])) {
return IsSeparator(rhs[i]);
} else if (IsNullTerminator(rhs[i])) {
return IsSeparator(lhs[i]);
} else if (lhs[i] != rhs[i]) {
return false;
}
}
}
}

117
libraries/libstratosphere/source/fs/fs_path_utils.cpp
View file

@ -17,31 +17,114 @@
namespace ams::fs { namespace ams::fs {
Result VerifyPath(const char *path, size_t max_path_len, size_t max_name_len) { namespace {
const char *cur = path;
size_t name_len = 0;
for (size_t path_len = 0; path_len <= max_path_len && name_len <= max_name_len; path_len++) { class PathVerifier {
const char c = *(cur++); private:
u32 invalid_chars[6];
u32 separators[2];
public:
PathVerifier() {
/* Convert all invalid characters. */
u32 *dst_invalid = this->invalid_chars;
for (const char *cur = ":*?<>|"; *cur != '\x00'; ++cur) {
AMS_ASSERT(dst_invalid < std::end(this->invalid_chars));
const auto result = util::ConvertCharacterUtf8ToUtf32(dst_invalid, cur);
AMS_ASSERT(result == util::CharacterEncodingResult_Success);
++dst_invalid;
}
AMS_ASSERT(dst_invalid == std::end(this->invalid_chars));
/* If terminated, we're done. */ /* Convert all separators. */
R_SUCCEED_IF(PathTool::IsNullTerminator(c)); u32 *dst_sep = this->separators;
for (const char *cur = "/\\"; *cur != '\x00'; ++cur) {
AMS_ASSERT(dst_sep < std::end(this->separators));
const auto result = util::ConvertCharacterUtf8ToUtf32(dst_sep, cur);
AMS_ASSERT(result == util::CharacterEncodingResult_Success);
++dst_sep;
}
AMS_ASSERT(dst_sep == std::end(this->separators));
}
/* TODO: Nintendo converts the path from utf-8 to utf-32, one character at a time. */ Result Verify(const char *path, int max_path_len, int max_name_len) const {
/* We should do this. */ AMS_ASSERT(path != nullptr);
/* Banned characters: :*?<>| */ auto cur = path;
R_UNLESS((c != ':' && c != '*' && c != '?' && c != '<' && c != '>' && c != '|'), fs::ResultInvalidCharacter()); auto name_len = 0;
name_len++; for (auto path_len = 0; path_len <= max_path_len && name_len <= max_name_len; ++path_len) {
/* Check for separator. */ /* We're done, if the path is terminated. */
if (c == '\\' || c == '/') { R_SUCCEED_IF(*cur == '\x00');
name_len = 0;
}
/* Get the current utf-8 character. */
util::CharacterEncodingResult result;
char char_buf[4] = {};
result = util::PickOutCharacterFromUtf8String(char_buf, std::addressof(cur));
R_UNLESS(result == util::CharacterEncodingResult_Success, fs::ResultInvalidCharacter());
/* Convert the current utf-8 character to utf-32. */
u32 path_char = 0;
result = util::ConvertCharacterUtf8ToUtf32(std::addressof(path_char), char_buf);
R_UNLESS(result == util::CharacterEncodingResult_Success, fs::ResultInvalidCharacter());
/* Check if the character is invalid. */
for (const auto invalid : this->invalid_chars) {
R_UNLESS(path_char != invalid, fs::ResultInvalidCharacter());
}
/* Increment name length. */
++name_len;
/* Check for separator. */
for (const auto sep : this->separators) {
if (path_char == sep) {
name_len = 0;
break;
}
}
}
/* The path was too long. */
return fs::ResultTooLongPath();
}
};
PathVerifier g_path_verifier;
}
Result VerifyPath(const char *path, int max_path_len, int max_name_len) {
return g_path_verifier.Verify(path, max_path_len, max_name_len);
}
bool IsSubPath(const char *lhs, const char *rhs) {
AMS_ASSERT(lhs != nullptr);
AMS_ASSERT(rhs != nullptr);
/* Special case certain paths. */
if (IsUnc(lhs) && !IsUnc(rhs)) {
return false;
}
if (!IsUnc(lhs) && IsUnc(rhs)) {
return false;
}
if (PathNormalizer::IsSeparator(lhs[0]) && PathNormalizer::IsNullTerminator(lhs[1]) && PathNormalizer::IsSeparator(rhs[0]) && !PathNormalizer::IsNullTerminator(rhs[1])) {
return true;
}
if (PathNormalizer::IsSeparator(rhs[0]) && PathNormalizer::IsNullTerminator(rhs[1]) && PathNormalizer::IsSeparator(lhs[0]) && !PathNormalizer::IsNullTerminator(lhs[1])) {
return true;
} }
return fs::ResultTooLongPath(); /* Check subpath. */
for (size_t i = 0; /* No terminating condition */; i++) {
if (PathNormalizer::IsNullTerminator(lhs[i])) {
return PathNormalizer::IsSeparator(rhs[i]);
} else if (PathNormalizer::IsNullTerminator(rhs[i])) {
return PathNormalizer::IsSeparator(lhs[i]);
} else if (lhs[i] != rhs[i]) {
return false;
}
}
} }
} }

22
libraries/libstratosphere/source/fs/fsa/fs_mount_utils.cpp
View file

@ -24,9 +24,9 @@ namespace ams::fs::impl {
const char *FindMountNameDriveSeparator(const char *path) { const char *FindMountNameDriveSeparator(const char *path) {
for (const char *cur = path; cur < path + MountNameLengthMax + 1; cur++) { for (const char *cur = path; cur < path + MountNameLengthMax + 1; cur++) {
if (PathTool::IsDriveSeparator(*cur)) { if (*cur == StringTraits::DriveSeparator) {
return cur; return cur;
} else if (PathTool::IsNullTerminator(*cur)) { } else if (PathNormalizer::IsNullTerminator(*cur)) {
break; break;
} }
} }
@ -35,7 +35,7 @@ namespace ams::fs::impl {
Result GetMountNameAndSubPath(MountName *out_mount_name, const char **out_sub_path, const char *path) { Result GetMountNameAndSubPath(MountName *out_mount_name, const char **out_sub_path, const char *path) {
/* Handle the Host-path case. */ /* Handle the Host-path case. */
if (PathTool::IsWindowsAbsolutePath(path) || PathTool::IsUnc(path)) { if (fs::IsWindowsDrive(path) || fs::IsUnc(path)) {
std::strncpy(out_mount_name->str, HostRootFileSystemMountName, MountNameLengthMax); std::strncpy(out_mount_name->str, HostRootFileSystemMountName, MountNameLengthMax);
out_mount_name->str[MountNameLengthMax] = '\x00'; out_mount_name->str[MountNameLengthMax] = '\x00';
return ResultSuccess(); return ResultSuccess();
@ -51,8 +51,8 @@ namespace ams::fs::impl {
/* Ensure the result sub-path is valid. */ /* Ensure the result sub-path is valid. */
const char *sub_path = drive_separator + 1; const char *sub_path = drive_separator + 1;
R_UNLESS(!PathTool::IsNullTerminator(sub_path[0]), fs::ResultInvalidMountName()); R_UNLESS(!PathNormalizer::IsNullTerminator(sub_path[0]), fs::ResultInvalidMountName());
R_UNLESS(PathTool::IsAnySeparator(sub_path[0]), fs::ResultInvalidPathFormat()); R_UNLESS(PathNormalizer::IsAnySeparator(sub_path[0]), fs::ResultInvalidPathFormat());
/* Set output. */ /* Set output. */
std::memcpy(out_mount_name->str, path, len); std::memcpy(out_mount_name->str, path, len);
@ -64,17 +64,17 @@ namespace ams::fs::impl {
} }
bool IsValidMountName(const char *name) { bool IsValidMountName(const char *name) {
if (PathTool::IsNullTerminator(*name)) { if (PathNormalizer::IsNullTerminator(name[0])) {
return false; return false;
} }
if (PathTool::IsWindowsDriveCharacter(name[0]) && PathTool::IsNullTerminator(name[1])) { if ((('a' <= name[0] && name[0] <= 'z') || ('A' <= name[0] && name[0] <= 'Z')) && PathNormalizer::IsNullTerminator(name[1])) {
return false; return false;
} }
size_t len = 0; size_t len = 0;
for (const char *cur = name; !PathTool::IsNullTerminator(*cur); cur++) { for (const char *cur = name; !PathNormalizer::IsNullTerminator(*cur); cur++) {
if (PathTool::IsDriveSeparator(*cur) || PathTool::IsSeparator(*cur)) { if (*cur == StringTraits::DriveSeparator || PathNormalizer::IsSeparator(*cur)) {
return false; return false;
} }
@ -87,10 +87,6 @@ namespace ams::fs::impl {
return true; return true;
} }
bool IsWindowsDrive(const char *name) {
return PathTool::IsWindowsAbsolutePath(name);
}
bool IsReservedMountName(const char *name) { bool IsReservedMountName(const char *name) {
return name[0] == ReservedMountNamePrefixCharacter; return name[0] == ReservedMountNamePrefixCharacter;
} }

2
libraries/libstratosphere/source/fssrv/fssrv_filesystem_interface_adapter.cpp
View file

@ -216,7 +216,7 @@ namespace ams::fssrv::impl {
R_UNLESS(old_normalizer.GetPath() != nullptr, old_normalizer.GetResult()); R_UNLESS(old_normalizer.GetPath() != nullptr, old_normalizer.GetResult());
R_UNLESS(new_normalizer.GetPath() != nullptr, new_normalizer.GetResult()); R_UNLESS(new_normalizer.GetPath() != nullptr, new_normalizer.GetResult());
const bool is_subpath = fssystem::PathTool::IsSubPath(old_normalizer.GetPath(), new_normalizer.GetPath()); const bool is_subpath = fs::IsSubPath(old_normalizer.GetPath(), new_normalizer.GetPath());
R_UNLESS(!is_subpath, fs::ResultDirectoryNotRenamable()); R_UNLESS(!is_subpath, fs::ResultDirectoryNotRenamable());
return this->base_fs->RenameFile(old_normalizer.GetPath(), new_normalizer.GetPath()); return this->base_fs->RenameFile(old_normalizer.GetPath(), new_normalizer.GetPath());

37
libraries/libstratosphere/source/fssrv/fssrv_path_normalizer.cpp
View file

@ -18,51 +18,36 @@
namespace ams::fssrv { namespace ams::fssrv {
Result PathNormalizer::Normalize(const char **out_path, Buffer *out_buf, const char *path, bool preserve_unc, bool preserve_tail_sep, bool has_mount_name) { Result PathNormalizer::Normalize(const char **out_path, Buffer *out_buf, const char *path, bool preserve_unc, bool preserve_tail_sep, bool has_mount_name) {
/* Check pre-conditions. */
AMS_ASSERT(out_path != nullptr);
AMS_ASSERT(out_buf != nullptr);
/* Clear output. */ /* Clear output. */
*out_path = nullptr; *out_path = nullptr;
*out_buf = Buffer(); *out_buf = Buffer();
/* Find start of path. */
const char *path_start = path;
if (has_mount_name) {
while (path_start < path + fs::MountNameLengthMax + 1) {
if (fssystem::PathTool::IsNullTerminator(*path_start)) {
break;
} else if (fssystem::PathTool::IsDriveSeparator(*(path_start++))) {
break;
}
}
R_UNLESS(path < path_start - 1, fs::ResultInvalidPath());
R_UNLESS(fssystem::PathTool::IsDriveSeparator(*(path_start - 1)), fs::ResultInvalidPath());
}
/* Check if we're normalized. */ /* Check if we're normalized. */
bool normalized = false; bool normalized = false;
R_TRY(fssystem::PathTool::IsNormalized(&normalized, path_start)); R_TRY(fs::PathNormalizer::IsNormalized(std::addressof(normalized), path, preserve_unc, has_mount_name));
if (normalized) { if (normalized) {
/* If we're already normalized, no allocation is needed. */ /* If we're already normalized, no allocation is needed. */
*out_path = path; *out_path = path;
} else { } else {
/* Allocate a new buffer. */ /* Allocate a new buffer. */
auto buffer = std::make_unique<char[]>(fs::EntryNameLengthMax + 1); auto buffer = fs::impl::MakeUnique<char[]>(fs::EntryNameLengthMax + 1);
R_UNLESS(buffer != nullptr, fs::ResultAllocationFailureInPathNormalizer()); R_UNLESS(buffer != nullptr, fs::ResultAllocationFailureInPathNormalizer());
/* Copy in mount name. */
const size_t mount_name_len = path_start - path;
std::memcpy(buffer.get(), path, mount_name_len);
/* Generate normalized path. */ /* Generate normalized path. */
size_t normalized_len = 0; size_t normalized_len = 0;
R_TRY(fssystem::PathTool::Normalize(buffer.get() + mount_name_len, &normalized_len, path_start, fs::EntryNameLengthMax + 1 - mount_name_len, preserve_unc)); R_TRY(fs::PathNormalizer::Normalize(buffer.get(), std::addressof(normalized_len), path, fs::EntryNameLengthMax + 1, preserve_unc, has_mount_name));
/* Preserve the tail separator, if we should. */ /* Preserve the tail separator, if we should. */
if (preserve_tail_sep) { if (preserve_tail_sep) {
if (fssystem::PathTool::IsSeparator(path[strnlen(path, fs::EntryNameLengthMax) - 1])) { if (fs::PathNormalizer::IsSeparator(path[strnlen(path, fs::EntryNameLengthMax) - 1]) && !fs::PathNormalizer::IsSeparator(buffer[normalized_len - 1])) {
/* Nintendo doesn't actually validate this. */ AMS_ASSERT(normalized_len < fs::EntryNameLengthMax);
R_UNLESS(mount_name_len + normalized_len < fs::EntryNameLengthMax, fs::ResultTooLongPath()); buffer[normalized_len] = fs::StringTraits::DirectorySeparator;
buffer[mount_name_len + normalized_len] = fssystem::StringTraits::DirectorySeparator; buffer[normalized_len + 1] = fs::StringTraits::NullTerminator;
buffer[mount_name_len + normalized_len + 1] = fssystem::StringTraits::NullTerminator;
} }
} }

42
libraries/libstratosphere/source/fssystem/fssystem_directory_redirection_filesystem.cpp
View file

@ -35,10 +35,10 @@ namespace ams::fssystem {
DirectoryRedirectionFileSystem::~DirectoryRedirectionFileSystem() { DirectoryRedirectionFileSystem::~DirectoryRedirectionFileSystem() {
if (this->before_dir != nullptr) { if (this->before_dir != nullptr) {
std::free(this->before_dir); fs::impl::Deallocate(this->before_dir, this->before_dir_len);
} }
if (this->after_dir != nullptr) { if (this->after_dir != nullptr) {
std::free(this->after_dir); fs::impl::Deallocate(this->after_dir, this->after_dir_len);
} }
} }
@ -53,26 +53,26 @@ namespace ams::fssystem {
/* Normalize the path. */ /* Normalize the path. */
char normalized_path[fs::EntryNameLengthMax + 2]; char normalized_path[fs::EntryNameLengthMax + 2];
size_t normalized_path_len; size_t normalized_path_len;
R_TRY(PathTool::Normalize(normalized_path, &normalized_path_len, dir, sizeof(normalized_path), this->IsUncPreserved())); R_TRY(fs::PathNormalizer::Normalize(normalized_path, &normalized_path_len, dir, sizeof(normalized_path), this->IsUncPreserved(), false));
/* Ensure terminating '/' */ /* Ensure terminating '/' */
if (!PathTool::IsSeparator(normalized_path[normalized_path_len - 1])) { if (!fs::PathNormalizer::IsSeparator(normalized_path[normalized_path_len - 1])) {
AMS_ABORT_UNLESS(normalized_path_len + 2 <= sizeof(normalized_path)); AMS_ASSERT(normalized_path_len + 2 < sizeof(normalized_path));
normalized_path[normalized_path_len] = StringTraits::DirectorySeparator; normalized_path[normalized_path_len] = fs::StringTraits::DirectorySeparator;
normalized_path[normalized_path_len + 1] = StringTraits::NullTerminator; normalized_path[normalized_path_len + 1] = fs::StringTraits::NullTerminator;
normalized_path_len++; ++normalized_path_len;
} }
/* Allocate new path. */ /* Allocate new path. */
const size_t size = normalized_path_len + 1; const size_t size = normalized_path_len + 1;
char *new_dir = static_cast<char *>(std::malloc(size)); char *new_dir = static_cast<char *>(fs::impl::Allocate(size));
AMS_ABORT_UNLESS(new_dir != nullptr); AMS_ABORT_UNLESS(new_dir != nullptr);
/* TODO: custom ResultAllocationFailure? */ /* TODO: custom ResultAllocationFailure? */
/* Copy path in. */ /* Copy path in. */
std::memcpy(new_dir, normalized_path, normalized_path_len); std::memcpy(new_dir, normalized_path, normalized_path_len);
new_dir[normalized_path_len] = StringTraits::NullTerminator; new_dir[normalized_path_len] = fs::StringTraits::NullTerminator;
/* Set output. */ /* Set output. */
*out = new_dir; *out = new_dir;
@ -82,20 +82,30 @@ namespace ams::fssystem {
Result DirectoryRedirectionFileSystem::Initialize(const char *before, const char *after) { Result DirectoryRedirectionFileSystem::Initialize(const char *before, const char *after) {
/* Normalize both directories. */ /* Normalize both directories. */
this->GetNormalizedDirectoryPath(&this->before_dir, &this->before_dir_len, before); this->GetNormalizedDirectoryPath(std::addressof(this->before_dir), std::addressof(this->before_dir_len), before);
this->GetNormalizedDirectoryPath(&this->after_dir, &this->after_dir_len, after); this->GetNormalizedDirectoryPath(std::addressof(this->after_dir), std::addressof(this->after_dir_len), after);
return ResultSuccess(); return ResultSuccess();
} }
Result DirectoryRedirectionFileSystem::ResolveFullPath(char *out, size_t out_size, const char *relative_path) { Result DirectoryRedirectionFileSystem::ResolveFullPath(char *out, size_t out_size, const char *relative_path) {
/* Check pre-conditions. */
AMS_ASSERT(relative_path[0] == '/');
AMS_ASSERT(this->before_dir_len >= 2);
AMS_ASSERT(this->after_dir_len >= 2);
AMS_ASSERT(this->after_dir_len <= out_size);
AMS_ASSERT(fs::PathNormalizer::IsNullTerminator(this->before_dir[this->before_dir_len - 1]));
AMS_ASSERT(fs::PathNormalizer::IsSeparator(this->before_dir[this->before_dir_len - 2]));
AMS_ASSERT(fs::PathNormalizer::IsNullTerminator(this->after_dir[this->after_dir_len - 1]));
AMS_ASSERT(fs::PathNormalizer::IsSeparator(this->after_dir[this->after_dir_len - 2]));
/* Normalize the relative path. */ /* Normalize the relative path. */
char normalized_rel_path[fs::EntryNameLengthMax + 1]; char normalized_rel_path[fs::EntryNameLengthMax + 1];
size_t normalized_rel_path_len; size_t normalized_rel_path_len;
R_TRY(PathTool::Normalize(normalized_rel_path, &normalized_rel_path_len, relative_path, sizeof(normalized_rel_path), this->IsUncPreserved())); R_TRY(fs::PathNormalizer::Normalize(normalized_rel_path, std::addressof(normalized_rel_path_len), relative_path, sizeof(normalized_rel_path), this->IsUncPreserved(), false));
const bool is_prefixed = std::memcmp(normalized_rel_path, this->before_dir, this->before_dir_len - 2) == 0 && const bool is_prefixed = std::memcmp(normalized_rel_path, this->before_dir, this->before_dir_len - 2) == 0 &&
(PathTool::IsSeparator(normalized_rel_path[this->before_dir_len - 2]) || PathTool::IsNullTerminator(normalized_rel_path[this->before_dir_len - 2])); (fs::PathNormalizer::IsSeparator(normalized_rel_path[this->before_dir_len - 2]) || fs::PathNormalizer::IsNullTerminator(normalized_rel_path[this->before_dir_len - 2]));
if (is_prefixed) { if (is_prefixed) {
const size_t before_prefix_len = this->before_dir_len - 2; const size_t before_prefix_len = this->before_dir_len - 2;
const size_t after_prefix_len = this->after_dir_len - 2; const size_t after_prefix_len = this->after_dir_len - 2;
@ -105,12 +115,12 @@ namespace ams::fssystem {
/* Copy normalized path. */ /* Copy normalized path. */
std::memcpy(out, this->after_dir, after_prefix_len); std::memcpy(out, this->after_dir, after_prefix_len);
std::memcpy(out + after_prefix_len, normalized_rel_path + before_prefix_len, normalized_rel_path_len - before_prefix_len); std::memcpy(out + after_prefix_len, normalized_rel_path + before_prefix_len, normalized_rel_path_len - before_prefix_len);
out[final_str_len] = StringTraits::NullTerminator; out[final_str_len] = fs::StringTraits::NullTerminator;
} else { } else {
/* Path is not prefixed. */ /* Path is not prefixed. */
R_UNLESS(normalized_rel_path_len + 1 <= out_size, fs::ResultTooLongPath()); R_UNLESS(normalized_rel_path_len + 1 <= out_size, fs::ResultTooLongPath());
std::memcpy(out, normalized_rel_path, normalized_rel_path_len); std::memcpy(out, normalized_rel_path, normalized_rel_path_len);
out[normalized_rel_path_len] = StringTraits::NullTerminator; out[normalized_rel_path_len] = fs::StringTraits::NullTerminator;
} }
return ResultSuccess(); return ResultSuccess();

8
libraries/libstratosphere/source/fssystem/fssystem_directory_savedata_filesystem.cpp
View file

@ -156,16 +156,16 @@ namespace ams::fssystem {
Result DirectorySaveDataFileSystem::ResolveFullPath(char *out, size_t out_size, const char *relative_path) { Result DirectorySaveDataFileSystem::ResolveFullPath(char *out, size_t out_size, const char *relative_path) {
R_UNLESS(strnlen(relative_path, fs::EntryNameLengthMax + 1) < fs::EntryNameLengthMax + 1, fs::ResultTooLongPath()); R_UNLESS(strnlen(relative_path, fs::EntryNameLengthMax + 1) < fs::EntryNameLengthMax + 1, fs::ResultTooLongPath());
R_UNLESS(PathTool::IsSeparator(relative_path[0]), fs::ResultInvalidPath()); R_UNLESS(fs::PathNormalizer::IsSeparator(relative_path[0]), fs::ResultInvalidPath());
/* Copy working directory path. */ /* Copy working directory path. */
std::strncpy(out, WorkingDirectoryPath, out_size); std::strncpy(out, WorkingDirectoryPath, out_size);
out[out_size - 1] = StringTraits::NullTerminator; out[out_size - 1] = fs::StringTraits::NullTerminator;
/* Normalize it. */ /* Normalize it. */
constexpr size_t WorkingDirectoryPathLength = sizeof(WorkingDirectoryPath) - 1; constexpr size_t WorkingDirectoryPathLength = sizeof(WorkingDirectoryPath) - 1;
size_t normalized_length; size_t normalized_length;
return PathTool::Normalize(out + WorkingDirectoryPathLength - 1, &normalized_length, relative_path, out_size - (WorkingDirectoryPathLength - 1)); return fs::PathNormalizer::Normalize(out + WorkingDirectoryPathLength - 1, &normalized_length, relative_path, out_size - (WorkingDirectoryPathLength - 1));
} }
void DirectorySaveDataFileSystem::OnWritableFileClose() { void DirectorySaveDataFileSystem::OnWritableFileClose() {
@ -186,7 +186,7 @@ namespace ams::fssystem {
R_TRY(this->AllocateWorkBuffer(&work_buf, &work_buf_size, IdealWorkBufferSize)); R_TRY(this->AllocateWorkBuffer(&work_buf, &work_buf_size, IdealWorkBufferSize));
/* Copy the directory recursively. */ /* Copy the directory recursively. */
R_TRY(fssystem::CopyDirectoryRecursively(this->base_fs, save_fs, PathTool::RootPath, PathTool::RootPath, work_buf.get(), work_buf_size)); R_TRY(fssystem::CopyDirectoryRecursively(this->base_fs, save_fs, fs::PathNormalizer::RootPath, fs::PathNormalizer::RootPath, work_buf.get(), work_buf_size));
return this->Commit(); return this->Commit();
} }

12
libraries/libstratosphere/source/fssystem/fssystem_partition_file_system.cpp
View file

@ -241,7 +241,7 @@ namespace ams::fssystem {
dir_entry.type = fs::DirectoryEntryType_File; dir_entry.type = fs::DirectoryEntryType_File;
dir_entry.file_size = this->parent->meta_data->GetEntry(this->cur_index)->size; dir_entry.file_size = this->parent->meta_data->GetEntry(this->cur_index)->size;
std::strncpy(dir_entry.name, this->parent->meta_data->GetEntryName(this->cur_index), sizeof(dir_entry.name) - 1); std::strncpy(dir_entry.name, this->parent->meta_data->GetEntryName(this->cur_index), sizeof(dir_entry.name) - 1);
dir_entry.name[sizeof(dir_entry.name) - 1] = StringTraits::NullTerminator; dir_entry.name[sizeof(dir_entry.name) - 1] = fs::StringTraits::NullTerminator;
} }
*out_count = entry_count; *out_count = entry_count;
@ -349,11 +349,11 @@ namespace ams::fssystem {
template <typename MetaType> template <typename MetaType>
Result PartitionFileSystemCore<MetaType>::DoGetEntryType(fs::DirectoryEntryType *out, const char *path) { Result PartitionFileSystemCore<MetaType>::DoGetEntryType(fs::DirectoryEntryType *out, const char *path) {
/* Validate preconditions. */ /* Validate preconditions. */
R_UNLESS(this->initialized, fs::ResultPreconditionViolation()); R_UNLESS(this->initialized, fs::ResultPreconditionViolation());
R_UNLESS(PathTool::IsSeparator(path[0]), fs::ResultInvalidPathFormat()); R_UNLESS(fs::PathNormalizer::IsSeparator(path[0]), fs::ResultInvalidPathFormat());
/* Check if the path is for a directory. */ /* Check if the path is for a directory. */
if (std::strncmp(path, PathTool::RootPath, sizeof(PathTool::RootPath)) == 0) { if (std::strncmp(path, fs::PathNormalizer::RootPath, sizeof(fs::PathNormalizer::RootPath)) == 0) {
*out = fs::DirectoryEntryType_Directory; *out = fs::DirectoryEntryType_Directory;
return ResultSuccess(); return ResultSuccess();
} }
@ -384,8 +384,8 @@ namespace ams::fssystem {
template <typename MetaType> template <typename MetaType>
Result PartitionFileSystemCore<MetaType>::DoOpenDirectory(std::unique_ptr<fs::fsa::IDirectory> *out_dir, const char *path, fs::OpenDirectoryMode mode) { Result PartitionFileSystemCore<MetaType>::DoOpenDirectory(std::unique_ptr<fs::fsa::IDirectory> *out_dir, const char *path, fs::OpenDirectoryMode mode) {
/* Validate preconditions. */ /* Validate preconditions. */
R_UNLESS(this->initialized, fs::ResultPreconditionViolation()); R_UNLESS(this->initialized, fs::ResultPreconditionViolation());
R_UNLESS(std::strncmp(path, PathTool::RootPath, sizeof(PathTool::RootPath)) == 0, fs::ResultPathNotFound()); R_UNLESS(std::strncmp(path, fs::PathNormalizer::RootPath, sizeof(fs::PathNormalizer::RootPath)) == 0, fs::ResultPathNotFound());
/* Create and output the partition directory. */ /* Create and output the partition directory. */
std::unique_ptr directory = std::make_unique<PartitionDirectory>(this, mode); std::unique_ptr directory = std::make_unique<PartitionDirectory>(this, mode);

20
libraries/libstratosphere/source/fssystem/fssystem_subdirectory_filesystem.cpp
View file

@ -33,7 +33,7 @@ namespace ams::fssystem {
SubDirectoryFileSystem::~SubDirectoryFileSystem() { SubDirectoryFileSystem::~SubDirectoryFileSystem() {
if (this->base_path != nullptr) { if (this->base_path != nullptr) {
std::free(this->base_path); fs::impl::Deallocate(this->base_path, this->base_path_len);
} }
} }
@ -44,25 +44,25 @@ namespace ams::fssystem {
/* Normalize the path. */ /* Normalize the path. */
char normalized_path[fs::EntryNameLengthMax + 2]; char normalized_path[fs::EntryNameLengthMax + 2];
size_t normalized_path_len; size_t normalized_path_len;
R_TRY(PathTool::Normalize(normalized_path, &normalized_path_len, bp, sizeof(normalized_path), this->IsUncPreserved())); R_TRY(fs::PathNormalizer::Normalize(normalized_path, std::addressof(normalized_path_len), bp, sizeof(normalized_path), this->IsUncPreserved()));
/* Ensure terminating '/' */ /* Ensure terminating '/' */
if (!PathTool::IsSeparator(normalized_path[normalized_path_len - 1])) { if (!fs::PathNormalizer::IsSeparator(normalized_path[normalized_path_len - 1])) {
AMS_ABORT_UNLESS(normalized_path_len + 2 <= sizeof(normalized_path)); AMS_ASSERT(normalized_path_len + 2 < sizeof(normalized_path));
normalized_path[normalized_path_len] = StringTraits::DirectorySeparator; normalized_path[normalized_path_len] = fs::StringTraits::DirectorySeparator;
normalized_path[normalized_path_len + 1] = StringTraits::NullTerminator; normalized_path[normalized_path_len + 1] = fs::StringTraits::NullTerminator;
normalized_path_len++; ++normalized_path_len;
} }
/* Allocate new path. */ /* Allocate new path. */
this->base_path_len = normalized_path_len + 1; this->base_path_len = normalized_path_len + 1;
this->base_path = static_cast<char *>(std::malloc(this->base_path_len)); this->base_path = static_cast<char *>(fs::impl::Allocate(this->base_path_len));
R_UNLESS(this->base_path != nullptr, fs::ResultAllocationFailureInSubDirectoryFileSystem()); R_UNLESS(this->base_path != nullptr, fs::ResultAllocationFailureInSubDirectoryFileSystem());
/* Copy path in. */ /* Copy path in. */
std::memcpy(this->base_path, normalized_path, normalized_path_len); std::memcpy(this->base_path, normalized_path, normalized_path_len);
this->base_path[normalized_path_len] = StringTraits::NullTerminator; this->base_path[normalized_path_len] = fs::StringTraits::NullTerminator;
return ResultSuccess(); return ResultSuccess();
} }
@ -76,7 +76,7 @@ namespace ams::fssystem {
/* Normalize it. */ /* Normalize it. */
const size_t prefix_size = this->base_path_len - 2; const size_t prefix_size = this->base_path_len - 2;
size_t normalized_len; size_t normalized_len;
return PathTool::Normalize(out + prefix_size, &normalized_len, relative_path, out_size - prefix_size, this->IsUncPreserved()); return fs::PathNormalizer::Normalize(out + prefix_size, std::addressof(normalized_len), relative_path, out_size - prefix_size, this->IsUncPreserved(), false);
} }
} }

12
libraries/libstratosphere/source/fssystem/fssystem_utility.cpp
View file

@ -31,15 +31,15 @@ namespace ams::fssystem {
/* Normalize the path. */ /* Normalize the path. */
char normalized_path[fs::EntryNameLengthMax + 1]; char normalized_path[fs::EntryNameLengthMax + 1];
size_t normalized_path_len; size_t normalized_path_len;
R_TRY(PathTool::Normalize(normalized_path, &normalized_path_len, path, sizeof(normalized_path))); R_TRY(fs::PathNormalizer::Normalize(normalized_path, std::addressof(normalized_path_len), path, sizeof(normalized_path)));
/* Repeatedly call CreateDirectory on each directory leading to the target. */ /* Repeatedly call CreateDirectory on each directory leading to the target. */
for (size_t i = 1; i < normalized_path_len; i++) { for (size_t i = 1; i < normalized_path_len; i++) {
/* If we detect a separator, create the directory. */ /* If we detect a separator, create the directory. */
if (PathTool::IsSeparator(normalized_path[i])) { if (fs::PathNormalizer::IsSeparator(normalized_path[i])) {
normalized_path[i] = StringTraits::NullTerminator; normalized_path[i] = fs::StringTraits::NullTerminator;
R_TRY(EnsureDirectory(fs, normalized_path)); R_TRY(EnsureDirectory(fs, normalized_path));
normalized_path[i] = StringTraits::DirectorySeparator; normalized_path[i] = fs::StringTraits::DirectorySeparator;
} }
} }
@ -120,10 +120,10 @@ namespace ams::fssystem {
/* Find previous separator, add null terminator */ /* Find previous separator, add null terminator */
char *cur = &dst_path_buf[len - 2]; char *cur = &dst_path_buf[len - 2];
while (!PathTool::IsSeparator(*cur) && cur > dst_path_buf) { while (!fs::PathNormalizer::IsSeparator(*cur) && cur > dst_path_buf) {
cur--; cur--;
} }
cur[1] = StringTraits::NullTerminator; cur[1] = fs::StringTraits::NullTerminator;
return ResultSuccess(); return ResultSuccess();
}, },

1
libraries/libvapours/include/vapours/util.hpp
View file

@ -40,5 +40,6 @@
#include <vapours/util/util_overlap.hpp> #include <vapours/util/util_overlap.hpp>
#include <vapours/util/util_string_util.hpp> #include <vapours/util/util_string_util.hpp>
#include <vapours/util/util_variadic.hpp> #include <vapours/util/util_variadic.hpp>
#include <vapours/util/util_character_encoding.hpp>
#include <vapours/util/util_format_string.hpp> #include <vapours/util/util_format_string.hpp>
#include <vapours/util/util_range.hpp> #include <vapours/util/util_range.hpp>

17
libraries/libstratosphere/include/stratosphere/fssystem/fssystem_path_tool.hpp → libraries/libvapours/include/vapours/util/util_character_encoding.hpp
View file

@ -13,14 +13,21 @@
* You should have received a copy of the GNU General Public License * You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>. * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/ */
#pragma once #pragma once
#include "../fs/fs_common.hpp" #include <vapours/common.hpp>
#include "../fs/fs_path_tool.hpp" #include <vapours/assert.hpp>
namespace ams::fssystem { namespace ams::util {
namespace StringTraits = ::ams::fs::StringTraits; enum CharacterEncodingResult {
CharacterEncodingResult_Success = 0,
CharacterEncodingResult_InsufficientLength = 1,
CharacterEncodingResult_InvalidFormat = 2,
};
using PathTool = ::ams::fs::PathTool; CharacterEncodingResult ConvertCharacterUtf8ToUtf32(u32 *dst, const char *src);
CharacterEncodingResult PickOutCharacterFromUtf8String(char *dst, const char **str);
} }

154
libraries/libvapours/source/util/util_character_encoding.cpp Normal file
View file

@ -0,0 +1,154 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <vapours.hpp>
namespace ams::util {
namespace {
constexpr inline 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,
};
constexpr inline const char * const Utf8NBytesTable = static_cast<const char *>(static_cast<const void *>(Utf8NBytesInnerTable + 1));
}
CharacterEncodingResult ConvertCharacterUtf8ToUtf32(u32 *dst, const char *src) {
/* Check pre-conditions. */
AMS_ASSERT(dst != nullptr);
AMS_ASSERT(src != nullptr);
/* Perform the conversion. */
const unsigned char *p = reinterpret_cast<const unsigned char *>(src);
switch (Utf8NBytesTable[p[0]]) {
case 1:
*dst = static_cast<u32>(p[0]);
return CharacterEncodingResult_Success;
case 2:
if ((p[0] & 0x1E) != 0) {
if (Utf8NBytesTable[p[1]] == 0) {
*dst = (static_cast<uint32_t>(p[0] & 0x1F) << 6) | (static_cast<uint32_t>(p[1] & 0x3F) << 0);
return CharacterEncodingResult_Success;
}
}
break;
case 3:
if (Utf8NBytesTable[p[1]] == 0 && Utf8NBytesTable[p[2]] == 0) {
const u32 c = (static_cast<uint32_t>(p[0] & 0xF) << 12) | (static_cast<uint32_t>(p[1] & 0x3F) << 6) | (static_cast<uint32_t>(p[2] & 0x3F) << 0);
if ((c & 0xF800) != 0 && (c & 0xF800) != 0xD800) {
*dst = c;
return CharacterEncodingResult_Success;
}
}
return CharacterEncodingResult_InvalidFormat;
case 4:
if (Utf8NBytesTable[p[1]] == 0 && Utf8NBytesTable[p[2]] == 0 && Utf8NBytesTable[p[3]] == 0) {
const u32 c = (static_cast<uint32_t>(p[0] & 0x7) << 18) | (static_cast<uint32_t>(p[1] & 0x3F) << 12) | (static_cast<uint32_t>(p[2] & 0x3F) << 6) | (static_cast<uint32_t>(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;
}
CharacterEncodingResult PickOutCharacterFromUtf8String(char *dst, const char **str) {
/* Check pre-conditions. */
AMS_ASSERT(dst != nullptr);
AMS_ASSERT(str != nullptr);
AMS_ASSERT(*str != nullptr);
/* Clear the output. */
dst[0] = 0;
dst[1] = 0;
dst[2] = 0;
dst[3] = 0;
/* Perform the conversion. */
const unsigned char *p = reinterpret_cast<const unsigned char *>(*str);
u32 c = *p;
switch (Utf8NBytesTable[c]) {
case 1:
dst[0] = (*str)[0];
++(*str);
break;
case 2:
if ((p[0] & 0x1E) != 0) {
if (Utf8NBytesTable[p[1]] == 0) {
c = (static_cast<uint32_t>(p[0] & 0x1F) << 6) | (static_cast<uint32_t>(p[1] & 0x3F) << 0);
dst[0] = (*str)[0];
dst[1] = (*str)[1];
(*str) += 2;
break;
}
}
return CharacterEncodingResult_InvalidFormat;
case 3:
if (Utf8NBytesTable[p[1]] == 0 && Utf8NBytesTable[p[2]] == 0) {
c = (static_cast<uint32_t>(p[0] & 0xF) << 12) | (static_cast<uint32_t>(p[1] & 0x3F) << 6) | (static_cast<uint32_t>(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 (Utf8NBytesTable[p[1]] == 0 && Utf8NBytesTable[p[2]] == 0 && Utf8NBytesTable[p[3]] == 0) {
c = (static_cast<uint32_t>(p[0] & 0x7) << 18) | (static_cast<uint32_t>(p[1] & 0x3F) << 12) | (static_cast<uint32_t>(p[2] & 0x3F) << 6) | (static_cast<uint32_t>(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;
}
}