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