Same behavior, but makes the interface more flexible and allows non-std::string instances to be used with it.
98 lines
2.7 KiB
C++
98 lines
2.7 KiB
C++
// Copyright 2016 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <algorithm>
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#include <set>
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#include "common/file_util.h"
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#include "common/string_util.h"
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#include "core/file_sys/path_parser.h"
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namespace FileSys {
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PathParser::PathParser(const Path& path) {
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if (path.GetType() != LowPathType::Char && path.GetType() != LowPathType::Wchar) {
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is_valid = false;
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return;
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}
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auto path_string = path.AsString();
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if (path_string.size() == 0 || path_string[0] != '/') {
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is_valid = false;
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return;
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}
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// Filter out invalid characters for the host system.
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// Although some of these characters are valid on 3DS, they are unlikely to be used by games.
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if (std::find_if(path_string.begin(), path_string.end(), [](char c) {
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static const std::set<char> invalid_chars{'<', '>', '\\', '|', ':', '\"', '*', '?'};
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return invalid_chars.find(c) != invalid_chars.end();
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}) != path_string.end()) {
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is_valid = false;
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return;
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}
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Common::SplitString(path_string, '/', path_sequence);
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auto begin = path_sequence.begin();
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auto end = path_sequence.end();
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end = std::remove_if(begin, end, [](std::string& str) { return str == "" || str == "."; });
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path_sequence = std::vector<std::string>(begin, end);
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// checks if the path is out of bounds.
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int level = 0;
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for (auto& node : path_sequence) {
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if (node == "..") {
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--level;
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if (level < 0) {
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is_valid = false;
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return;
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}
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} else {
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++level;
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}
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}
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is_valid = true;
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is_root = level == 0;
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}
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PathParser::HostStatus PathParser::GetHostStatus(std::string_view mount_point) const {
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std::string path{mount_point};
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if (!FileUtil::IsDirectory(path))
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return InvalidMountPoint;
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if (path_sequence.empty()) {
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return DirectoryFound;
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}
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for (auto iter = path_sequence.begin(); iter != path_sequence.end() - 1; iter++) {
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if (path.back() != '/')
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path += '/';
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path += *iter;
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if (!FileUtil::Exists(path))
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return PathNotFound;
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if (FileUtil::IsDirectory(path))
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continue;
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return FileInPath;
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}
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path += "/" + path_sequence.back();
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if (!FileUtil::Exists(path))
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return NotFound;
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if (FileUtil::IsDirectory(path))
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return DirectoryFound;
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return FileFound;
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}
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std::string PathParser::BuildHostPath(std::string_view mount_point) const {
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std::string path{mount_point};
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for (auto& node : path_sequence) {
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if (path.back() != '/')
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path += '/';
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path += node;
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}
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return path;
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}
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} // namespace FileSys
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