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author | wwylele <wwylele@gmail.com> | 2016-10-16 16:19:13 +0200 |
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committer | wwylele <wwylele@gmail.com> | 2016-11-19 16:17:19 +0100 |
commit | 75ee2f8c67022b0731e438b34fa65216531eccd1 (patch) | |
tree | df4293ddc6a1712e102a7f2d8d71205364b02d6b /src/core/file_sys/path_parser.cpp | |
parent | FileSys: make Archive interfaces return error code (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | src/core/file_sys/path_parser.cpp | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/src/core/file_sys/path_parser.cpp b/src/core/file_sys/path_parser.cpp new file mode 100644 index 000000000..5a89b02b8 --- /dev/null +++ b/src/core/file_sys/path_parser.cpp @@ -0,0 +1,98 @@ +// 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 |