| 212 | } |
| 213 | |
| 214 | int PieceToByte(absl::string_view piece) { |
| 215 | using PieceToByteMap = absl::flat_hash_map<std::string, unsigned char>; |
| 216 | static const auto *const kMap = []() -> PieceToByteMap * { |
| 217 | auto *m = new PieceToByteMap(); |
| 218 | for (int i = 0; i < 256; ++i) { |
| 219 | (*m)[ByteToPiece(i)] = i; |
| 220 | } |
| 221 | return m; |
| 222 | }(); |
| 223 | const auto it = kMap->find(std::string(piece)); |
| 224 | if (it == kMap->end()) { |
| 225 | return -1; |
| 226 | } else { |
| 227 | return it->second; |
| 228 | } |
| 229 | } |
| 230 | |
| 231 | } // namespace sentencepiece |