William A. Kennington III | 226bc42 | 2021-05-05 17:08:36 -0700 | [diff] [blame] | 1 | #include <systemd/sd-bus.h> |
| 2 | |
| 3 | #include <sdbusplus/message/native_types.hpp> |
| 4 | #include <sdbusplus/utility/memory.hpp> |
| 5 | |
| 6 | #include <array> |
| 7 | |
| 8 | namespace sdbusplus |
| 9 | { |
| 10 | namespace message |
| 11 | { |
| 12 | namespace details |
| 13 | { |
| 14 | |
| 15 | std::string string_path_wrapper::filename() const |
| 16 | { |
| 17 | size_t firstIndex = str.rfind('/'); |
| 18 | |
| 19 | // Dbus paths must start with /, if we don't find one, it's an error |
| 20 | if (firstIndex == std::string::npos) |
| 21 | { |
| 22 | return ""; |
| 23 | } |
| 24 | firstIndex++; |
| 25 | // If we don't see that this was encoded by sdbusplus, return the naive |
| 26 | // version of the filename path. |
| 27 | const char* filename = str.c_str() + firstIndex; |
| 28 | if (*filename != '_') |
| 29 | { |
| 30 | return std::string(filename); |
| 31 | } |
| 32 | |
| 33 | _cleanup_free_ char* out = nullptr; |
| 34 | int r = sd_bus_path_decode_many(filename, "%", &out); |
| 35 | if (r <= 0) |
| 36 | { |
| 37 | return ""; |
| 38 | } |
| 39 | return std::string(out); |
| 40 | } |
| 41 | |
| 42 | string_path_wrapper string_path_wrapper::parent_path() const |
| 43 | { |
| 44 | auto index = str.rfind('/'); |
| 45 | if (index == std::string::npos) |
| 46 | { |
| 47 | return string_path_wrapper("/"); |
| 48 | } |
| 49 | if (index <= 1) |
| 50 | { |
| 51 | return string_path_wrapper("/"); |
| 52 | } |
| 53 | |
| 54 | return str.substr(0, index); |
| 55 | } |
| 56 | |
| 57 | string_path_wrapper string_path_wrapper::operator/(const char* extId) const |
| 58 | { |
| 59 | string_path_wrapper out; |
| 60 | _cleanup_free_ char* encOut = nullptr; |
| 61 | int ret = sd_bus_path_encode(str.c_str(), extId, &encOut); |
| 62 | if (ret < 0) |
| 63 | { |
| 64 | return out; |
| 65 | } |
| 66 | out.str = encOut; |
| 67 | |
| 68 | size_t firstIndex = str.size(); |
| 69 | if (str != "/") |
| 70 | { |
| 71 | firstIndex++; |
| 72 | } |
| 73 | |
| 74 | // Attempt to encode the first character of the path. This allows the |
| 75 | // filename() method to "detect" that this is a path that's been encoded |
| 76 | // and to decode it properly. This was needed to support a number of |
| 77 | // paths that currently dont' have any encoding, and utilize underscores |
| 78 | // Ideally this, and the equivalent code in filename() would go away |
| 79 | // when all paths are being encoded per systemds methods. |
| 80 | if (out.str[firstIndex] == '_') |
| 81 | { |
| 82 | return out; |
| 83 | } |
| 84 | |
| 85 | constexpr std::array<char, 16> hex{'0', '1', '2', '3', '4', '5', '6', '7', |
| 86 | '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'}; |
| 87 | uint8_t firstChar = static_cast<uint8_t>(*extId); |
| 88 | out.str[firstIndex] = '_'; |
| 89 | std::array<char, 2> encoded{hex[(firstChar >> 4) & 0xF], |
| 90 | hex[firstChar & 0xF]}; |
| 91 | out.str.insert(out.str.begin() + firstIndex + 1, encoded.begin(), |
| 92 | encoded.end()); |
| 93 | |
| 94 | return out; |
| 95 | } |
| 96 | |
| 97 | string_path_wrapper& string_path_wrapper::operator/=(const char* extId) |
| 98 | { |
| 99 | string_path_wrapper out = this->operator/(extId); |
| 100 | this->str = std::move(out.str); |
| 101 | return *this; |
| 102 | } |
| 103 | |
| 104 | } // namespace details |
| 105 | } // namespace message |
| 106 | } // namespace sdbusplus |