mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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123 lines
4.5 KiB
C++
123 lines
4.5 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <stratosphere/fs/fs_common.hpp>
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#include <stratosphere/fssrv/sf/fssrv_sf_path.hpp>
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namespace ams::fs {
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namespace StringTraits {
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constexpr inline char DirectorySeparator = '/';
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constexpr inline char DriveSeparator = ':';
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constexpr inline char Dot = '.';
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constexpr inline char NullTerminator = '\x00';
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constexpr inline char AlternateDirectorySeparator = '\\';
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}
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/* Windows path utilities. */
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constexpr inline bool IsWindowsDrive(const char *path) {
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AMS_ASSERT(path != nullptr);
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const char c = path[0];
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return (('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z')) && path[1] == StringTraits::DriveSeparator;
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}
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constexpr inline bool IsUnc(const char *path) {
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return (path[0] == StringTraits::DirectorySeparator && path[1] == StringTraits::DirectorySeparator) ||
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(path[0] == StringTraits::AlternateDirectorySeparator && path[1] == StringTraits::AlternateDirectorySeparator);
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}
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constexpr inline s64 GetWindowsPathSkipLength(const char *path) {
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if (IsWindowsDrive(path)) {
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return 2;
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}
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if (IsUnc(path)) {
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for (s64 i = 2; path[i] != StringTraits::NullTerminator; ++i) {
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if (path[i] == '$' || path[i] == ':') {
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return i + 1;
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}
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}
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}
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return 0;
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}
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/* Path utilities. */
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inline void Replace(char *dst, size_t dst_size, char old_char, char new_char) {
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AMS_ASSERT(dst != nullptr);
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for (char *cur = dst; cur < dst + dst_size && *cur != StringTraits::NullTerminator; ++cur) {
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if (*cur == old_char) {
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*cur = new_char;
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}
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}
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}
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Result FspPathPrintf(fssrv::sf::FspPath *dst, const char *format, ...) __attribute__((format(printf, 2, 3)));
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inline Result FspPathPrintf(fssrv::sf::FspPath *dst, const char *format, ...) {
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AMS_ASSERT(dst != nullptr);
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/* Format the path. */
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std::va_list va_list;
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va_start(va_list, format);
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const size_t len = std::vsnprintf(dst->str, sizeof(dst->str), format, va_list);
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va_end(va_list);
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/* Validate length. */
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R_UNLESS(len < sizeof(dst->str), fs::ResultTooLongPath());
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/* Fix slashes. */
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Replace(dst->str, sizeof(dst->str) - 1, '\\', '/');
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return ResultSuccess();
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}
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Result VerifyPath(const char *path, int max_path_len, int max_name_len);
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bool IsSubPath(const char *lhs, const char *rhs);
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/* Path normalization. */
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class PathNormalizer {
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public:
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static constexpr const char RootPath[] = "/";
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public:
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static constexpr inline bool IsSeparator(char c) {
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return c == StringTraits::DirectorySeparator;
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}
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static constexpr inline bool IsAnySeparator(char c) {
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return c == StringTraits::DirectorySeparator || c == StringTraits::AlternateDirectorySeparator;
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}
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static constexpr inline bool IsNullTerminator(char c) {
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return c == StringTraits::NullTerminator;
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}
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static constexpr inline bool IsCurrentDirectory(const char *p) {
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return p[0] == StringTraits::Dot && (IsSeparator(p[1]) || IsNullTerminator(p[1]));
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}
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static constexpr inline bool IsParentDirectory(const char *p) {
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return p[0] == StringTraits::Dot && p[1] == StringTraits::Dot && (IsSeparator(p[2]) || IsNullTerminator(p[2]));
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}
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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);
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static Result IsNormalized(bool *out, const char *path, bool unc_preserved = false, bool has_mount_name = false);
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};
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}
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