microsoft/onnxruntime-extensions
Publicmirrored fromhttps://github.com/microsoft/onnxruntime-extensionsAvailable
operators/tokenizer/bpetokenizer.hpp
426lines · modecode
| 1 | // Licensed under the MIT License. |
| 2 | // Partial code comes from other Microsoft employee. |
| 3 | #pragma once |
| 4 | #include <string> |
| 5 | #include <vector> |
| 6 | #include <fstream> |
| 7 | #include <sstream> |
| 8 | #include <iostream> |
| 9 | #include <algorithm> |
| 10 | #include <list> |
| 11 | #include <memory> |
| 12 | #include <regex> |
| 13 | #include <sstream> |
| 14 | #include <stdexcept> |
| 15 | #include <unordered_map> |
| 16 | #include <functional> |
| 17 | #include <codecvt> |
| 18 | #include <mutex> |
| 19 | |
| 20 | #include "nlohmann/json.hpp" |
| 21 | #include "clip_tokenizer.hpp" |
| 22 | #include "gpt2_tokenizer.hpp" |
| 23 | #include "string_tensor.h" |
| 24 | #include "unicode.h" |
| 25 | |
| 26 | class SpecialTokenMap { |
| 27 | public: |
| 28 | void Add(ustring p_str, int p_id) { |
| 29 | auto it = token_map_.find(p_str); |
| 30 | if (it != token_map_.end()) { |
| 31 | if (it->second != p_id) { |
| 32 | ORTX_CXX_API_THROW("Duplicate special tokens.", ORT_INVALID_ARGUMENT); |
| 33 | } |
| 34 | } else { |
| 35 | token_map_[p_str] = p_id; |
| 36 | token_list_.push_back(SpecialTokenInfo(std::move(p_str), p_id)); |
| 37 | } |
| 38 | } |
| 39 | |
| 40 | std::list<std::pair<ustring, int>> SplitBySpecialTokens(ustring input) const { |
| 41 | std::list<std::pair<ustring, int>> res; |
| 42 | res.emplace_back(std::move(input), -1); |
| 43 | for (const auto& st : token_list_) { |
| 44 | std::list<std::pair<ustring, int>> new_split_res; |
| 45 | for (auto& str : res) { |
| 46 | if (str.second != -1) { |
| 47 | new_split_res.push_back(std::move(str)); |
| 48 | continue; |
| 49 | } |
| 50 | auto it = str.first.begin(); |
| 51 | size_t search_pos = 0; |
| 52 | while (it != str.first.end()) { |
| 53 | // works fine for all clang-based platform: Mac OS, Android, WebAssembly |
| 54 | #if defined(__clang__) |
| 55 | auto search_it = std::search(it, str.first.end(), st.str.begin(), st.str.end()); |
| 56 | #else |
| 57 | auto search_it = std::search(it, str.first.end(), |
| 58 | std::boyer_moore_searcher(st.str.begin(), st.str.end())); |
| 59 | #endif |
| 60 | if (search_it == str.first.end()) { |
| 61 | new_split_res.emplace_back(str.first.substr(search_pos), -1); |
| 62 | break; |
| 63 | } |
| 64 | auto prefixLen = search_it - it; |
| 65 | if (prefixLen != 0) { |
| 66 | new_split_res.emplace_back(str.first.substr(search_pos, prefixLen), -1); |
| 67 | search_pos += prefixLen; |
| 68 | } |
| 69 | new_split_res.emplace_back(str.first.substr(search_pos, st.str.size()), st.id); |
| 70 | it = search_it + st.str.size(); |
| 71 | search_pos += st.str.size(); |
| 72 | } |
| 73 | } |
| 74 | std::swap(new_split_res, res); |
| 75 | } |
| 76 | return res; |
| 77 | } |
| 78 | |
| 79 | private: |
| 80 | struct SpecialTokenInfo { |
| 81 | ustring str; |
| 82 | int id; |
| 83 | |
| 84 | SpecialTokenInfo(ustring p_str, int p_id) |
| 85 | : str(std::move(p_str)), id(p_id) { |
| 86 | if (str.empty()) { |
| 87 | ORTX_CXX_API_THROW("Empty special token.", ORT_INVALID_ARGUMENT); |
| 88 | } |
| 89 | } |
| 90 | }; |
| 91 | |
| 92 | std::list<SpecialTokenInfo> token_list_; |
| 93 | std::unordered_map<ustring, int> token_map_; |
| 94 | }; |
| 95 | |
| 96 | using json = nlohmann::json; |
| 97 | class VocabData { |
| 98 | public: |
| 99 | VocabData() |
| 100 | : unk_id_(-1) { |
| 101 | } |
| 102 | |
| 103 | struct BpeNode { |
| 104 | int id; |
| 105 | int value; |
| 106 | }; |
| 107 | |
| 108 | void Load(std::istream& vocab_stream, std::istream& merges_stream, const char* unk_token, const char* special_tokens) { |
| 109 | json tok_json; |
| 110 | vocab_stream >> tok_json; |
| 111 | vocab_map_ = std::move(tok_json.get<std::unordered_map<std::string, int>>()); |
| 112 | |
| 113 | auto it = vocab_map_.find(unk_token); |
| 114 | if (it != vocab_map_.end()) { |
| 115 | unk_id_ = it->second; |
| 116 | } else { |
| 117 | int id = static_cast<int>(vocab_map_.size()); |
| 118 | vocab_map_[unk_token] = id; |
| 119 | std::cerr << "Special token (" << unk_token << ") have been added in the vocabulary." << std::endl; |
| 120 | } |
| 121 | |
| 122 | std::wstring_convert<std::codecvt_utf8<char32_t>, char32_t> str_convert; |
| 123 | for (auto i = 33; i <= 126; ++i) { |
| 124 | byte_encoder_[i] = GetVocabIndex(str_convert.to_bytes((char32_t)i)); |
| 125 | } |
| 126 | for (auto i = 161; i <= 172; ++i) { |
| 127 | byte_encoder_[i] = GetVocabIndex(str_convert.to_bytes((char32_t)i)); |
| 128 | } |
| 129 | for (auto i = 174; i <= 255; ++i) { |
| 130 | byte_encoder_[i] = GetVocabIndex(str_convert.to_bytes((char32_t)i)); |
| 131 | } |
| 132 | |
| 133 | int index = 256; |
| 134 | for (auto i = 0; i < 33; ++i) { |
| 135 | byte_encoder_[i] = GetVocabIndex(str_convert.to_bytes((char32_t)(index++))); |
| 136 | } |
| 137 | for (auto i = 127; i < 161; ++i) { |
| 138 | byte_encoder_[i] = GetVocabIndex(str_convert.to_bytes((char32_t)(index++))); |
| 139 | } |
| 140 | byte_encoder_[173] = GetVocabIndex(str_convert.to_bytes((char32_t)(index++))); |
| 141 | |
| 142 | index = 0; |
| 143 | std::string line; |
| 144 | while (std::getline(merges_stream, line)) { |
| 145 | line = std::regex_replace(line, std::regex("\r"), ""); |
| 146 | if (line.empty()) continue; |
| 147 | if ((line[0] == '#') && (index == 0)) continue; |
| 148 | auto pos = line.find(' '); |
| 149 | if (pos == std::string::npos) { |
| 150 | ORTX_CXX_API_THROW("Cannot know how to parse line: " + line, ORT_INVALID_ARGUMENT); |
| 151 | } |
| 152 | std::string w1 = line.substr(0, pos); |
| 153 | std::string w2 = line.substr(pos + 1); |
| 154 | int iw1 = GetVocabIndex(w1); |
| 155 | int iw2 = GetVocabIndex(w2); |
| 156 | int iww = GetVocabIndex(w1 + w2); |
| 157 | std::pair<int, int> key{iw1, iw2}; |
| 158 | BpeNode value{iww, index++}; |
| 159 | bpe_map_[key] = value; |
| 160 | } |
| 161 | |
| 162 | if (special_tokens != nullptr) { |
| 163 | std::istringstream istrea(special_tokens); |
| 164 | |
| 165 | while (istrea >> line) { |
| 166 | if (line.empty()) continue; |
| 167 | line = std::regex_replace(line, std::regex("\r"), ""); |
| 168 | ustring line_32(line); |
| 169 | int id = static_cast<int>(vocab_map_.size()); |
| 170 | if (auto nestedIt = vocab_map_.find(line); nestedIt != vocab_map_.end()) { |
| 171 | id = nestedIt->second; |
| 172 | } else { |
| 173 | vocab_map_[line] = id; |
| 174 | } |
| 175 | special_tokens_.Add(std::move(line_32), id); |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | id2token_map_.resize(vocab_map_.size()); |
| 180 | for (const auto& [t, i] : vocab_map_) { |
| 181 | id2token_map_[i] = t; |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | void bpe(std::list<int>& vals) const { |
| 186 | while (vals.size() >= 2) { |
| 187 | auto pos_it = vals.end(); |
| 188 | int minval = std::numeric_limits<int>::max(); |
| 189 | int ori_id1 = 0, ori_id2 = 0; |
| 190 | int aim_id = 0; |
| 191 | for (auto it = vals.begin(); it != vals.end(); ++it) { |
| 192 | auto it2 = it; |
| 193 | ++it2; |
| 194 | if (it2 == vals.end()) break; |
| 195 | auto map_it = bpe_map_.find({*it, *it2}); |
| 196 | if (map_it == bpe_map_.end()) continue; |
| 197 | if (minval > map_it->second.value) { |
| 198 | ori_id1 = *it; |
| 199 | ori_id2 = *it2; |
| 200 | minval = map_it->second.value; |
| 201 | pos_it = it; |
| 202 | aim_id = map_it->second.id; |
| 203 | } |
| 204 | } |
| 205 | if (pos_it == vals.end()) break; |
| 206 | |
| 207 | pos_it = vals.erase(pos_it); |
| 208 | *pos_it = aim_id; |
| 209 | for (++pos_it; pos_it != vals.end(); ++pos_it) { |
| 210 | if (*pos_it != ori_id1) continue; |
| 211 | auto it2 = pos_it; |
| 212 | ++it2; |
| 213 | if (it2 == vals.end()) break; |
| 214 | if (*it2 != ori_id2) continue; |
| 215 | pos_it = vals.erase(pos_it); |
| 216 | *pos_it = aim_id; |
| 217 | } |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | const auto& ByteEncoder() const { |
| 222 | return byte_encoder_; |
| 223 | } |
| 224 | |
| 225 | auto SplitBySpecialTokens(const ustring& input) const { |
| 226 | return special_tokens_.SplitBySpecialTokens(input); |
| 227 | } |
| 228 | |
| 229 | int GetEncoding(const std::string& key) { |
| 230 | auto it = vocab_map_.find(key); |
| 231 | return it->second; |
| 232 | } |
| 233 | |
| 234 | size_t VocabSize() const { return vocab_map_.size(); } |
| 235 | |
| 236 | int TokenToID(const std::string& input) const { |
| 237 | auto it = vocab_map_.find(input); |
| 238 | if (it == vocab_map_.end()) { |
| 239 | ORTX_CXX_API_THROW("Token not found: " + input, ORT_INVALID_ARGUMENT); |
| 240 | } |
| 241 | return it->second; |
| 242 | } |
| 243 | |
| 244 | const std::string& IdToToken(int id) const { |
| 245 | if ((id < 0) || (static_cast<size_t>(id) >= id2token_map_.size())) { |
| 246 | ORTX_CXX_API_THROW("Invalid ID: " + std::to_string(id), ORT_INVALID_ARGUMENT); |
| 247 | } |
| 248 | return id2token_map_[id]; |
| 249 | } |
| 250 | |
| 251 | private: |
| 252 | int GetVocabIndex(const std::string& str) { |
| 253 | auto it = vocab_map_.find(str); |
| 254 | if (it == vocab_map_.end()) { |
| 255 | ORTX_CXX_API_THROW("Cannot find word in vocabulary: " + str, ORT_INVALID_ARGUMENT); |
| 256 | } |
| 257 | return it->second; |
| 258 | } |
| 259 | |
| 260 | private: |
| 261 | struct hash_pair { |
| 262 | template <class T1, class T2> |
| 263 | size_t operator()(const std::pair<T1, T2>& p) const { |
| 264 | auto hash1 = std::hash<T1>{}(p.first); |
| 265 | auto hash2 = std::hash<T2>{}(p.second); |
| 266 | return hash1 ^ (hash2 << 16); |
| 267 | } |
| 268 | }; |
| 269 | std::unordered_map<std::pair<int, int>, BpeNode, hash_pair> bpe_map_; |
| 270 | |
| 271 | int byte_encoder_[256] = {}; |
| 272 | std::unordered_map<std::string, int> vocab_map_; |
| 273 | std::vector<std::string> id2token_map_; |
| 274 | |
| 275 | int unk_id_; |
| 276 | SpecialTokenMap special_tokens_; |
| 277 | }; |
| 278 | |
| 279 | class TokenWithRegularExp { |
| 280 | public: |
| 281 | void Set(std::u32string_view val) { |
| 282 | m_text = val; |
| 283 | } |
| 284 | |
| 285 | std::pair<bool, std::u32string_view> GetNextToken() { |
| 286 | while (!m_text.empty()) { |
| 287 | auto res = TryMatch(); |
| 288 | if (res.empty()) { |
| 289 | m_text = m_text.substr(1); |
| 290 | continue; |
| 291 | } |
| 292 | return {true, res}; |
| 293 | } |
| 294 | return {false, {}}; |
| 295 | } |
| 296 | |
| 297 | private: |
| 298 | std::u32string_view TryMatch() { |
| 299 | // python pattern: |
| 300 | // 's|'t|'re|'ve|'m|'ll|'d| ?\p{L}+| ?\p{N}+| ?[^\s\p{L}\p{N}]+|\s+(?!\S)|\s+ |
| 301 | |
| 302 | // 's|'t|'re|'ve|'m|'ll|'d| |
| 303 | // Note: the sequencial of the following if should not be switched, which follows the python regex's syntax |
| 304 | if ((m_text[0] == U'\'') && (m_text.size() > 1)) { |
| 305 | if ((m_text[1] == U's') || (m_text[1] == U't') || |
| 306 | (m_text[1] == U'm') || (m_text[1] == U'd')) { |
| 307 | std::u32string_view res = m_text.substr(0, 2); |
| 308 | m_text = m_text.substr(2); |
| 309 | return res; |
| 310 | } |
| 311 | |
| 312 | if (m_text.size() > 2) { |
| 313 | if (((m_text[1] == U'r') && (m_text[2] == U'e')) || |
| 314 | ((m_text[1] == U'v') && (m_text[2] == U'e')) || |
| 315 | ((m_text[1] == U'l') && (m_text[2] == U'l'))) { |
| 316 | std::u32string_view res = m_text.substr(0, 3); |
| 317 | m_text = m_text.substr(3); |
| 318 | return res; |
| 319 | } |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | // ?\p{L}+ |
| 324 | if ((m_text[0] == U' ') && (m_text.size() > 1) && (ufal::unilib::unicode::category(m_text[1]) & ufal::unilib::unicode::L)) { |
| 325 | size_t i = 2; |
| 326 | for (; i < m_text.size(); ++i) { |
| 327 | if ((ufal::unilib::unicode::category(m_text[i]) & ufal::unilib::unicode::L) == 0) |
| 328 | break; |
| 329 | } |
| 330 | std::u32string_view res = m_text.substr(0, i); |
| 331 | m_text = m_text.substr(i); |
| 332 | return res; |
| 333 | } |
| 334 | if (ufal::unilib::unicode::category(m_text[0]) & ufal::unilib::unicode::L) { |
| 335 | size_t i = 1; |
| 336 | for (; i < m_text.size(); ++i) { |
| 337 | if ((ufal::unilib::unicode::category(m_text[i]) & ufal::unilib::unicode::L) == 0) |
| 338 | break; |
| 339 | } |
| 340 | std::u32string_view res = m_text.substr(0, i); |
| 341 | m_text = m_text.substr(i); |
| 342 | return res; |
| 343 | } |
| 344 | |
| 345 | // ?\p{N}+ |
| 346 | if ((m_text[0] == U' ') && (m_text.size() > 1) && (ufal::unilib::unicode::category(m_text[1]) & ufal::unilib::unicode::N)) { |
| 347 | size_t i = 2; |
| 348 | for (; i < m_text.size(); ++i) { |
| 349 | if ((ufal::unilib::unicode::category(m_text[i]) & ufal::unilib::unicode::N) == 0) |
| 350 | break; |
| 351 | } |
| 352 | std::u32string_view res = m_text.substr(0, i); |
| 353 | m_text = m_text.substr(i); |
| 354 | return res; |
| 355 | } |
| 356 | if (ufal::unilib::unicode::category(m_text[0]) & ufal::unilib::unicode::N) { |
| 357 | size_t i = 1; |
| 358 | for (; i < m_text.size(); ++i) { |
| 359 | if ((ufal::unilib::unicode::category(m_text[i]) & ufal::unilib::unicode::N) == 0) |
| 360 | break; |
| 361 | } |
| 362 | std::u32string_view res = m_text.substr(0, i); |
| 363 | m_text = m_text.substr(i); |
| 364 | return res; |
| 365 | } |
| 366 | |
| 367 | // ?[^\s\p{L}\p{N}]+ |
| 368 | if ((m_text[0] == U' ') && (m_text.size() > 1) && (NotLNZ(m_text[1]))) { |
| 369 | size_t i = 2; |
| 370 | for (; i < m_text.size(); ++i) { |
| 371 | if (!NotLNZ(m_text[i])) |
| 372 | break; |
| 373 | } |
| 374 | std::u32string_view res = m_text.substr(0, i); |
| 375 | m_text = m_text.substr(i); |
| 376 | return res; |
| 377 | } |
| 378 | if (NotLNZ(m_text[0])) { |
| 379 | size_t i = 1; |
| 380 | for (; i < m_text.size(); ++i) { |
| 381 | if (!NotLNZ(m_text[i])) |
| 382 | break; |
| 383 | } |
| 384 | std::u32string_view res = m_text.substr(0, i); |
| 385 | m_text = m_text.substr(i); |
| 386 | return res; |
| 387 | } |
| 388 | |
| 389 | // \s+(?!\S)|\s+ |
| 390 | if ((m_text.size() >= 1) && (IsZ(m_text[0]))) { |
| 391 | size_t i = 1; |
| 392 | for (; i < m_text.size(); ++i) { |
| 393 | if (!IsZ(m_text[i])) break; |
| 394 | } |
| 395 | if ((i > 1) && (i != m_text.size())) //\s+(?!\S) |
| 396 | { |
| 397 | i--; |
| 398 | std::u32string_view res = m_text.substr(0, i); |
| 399 | m_text = m_text.substr(i); |
| 400 | return res; |
| 401 | } |
| 402 | // \s+ |
| 403 | std::u32string_view res = m_text.substr(0, i); |
| 404 | m_text = m_text.substr(i); |
| 405 | return res; |
| 406 | } |
| 407 | |
| 408 | return std::u32string_view{}; |
| 409 | } |
| 410 | |
| 411 | static bool IsZ(char32_t ch) { |
| 412 | auto category = ufal::unilib::unicode::category(ch); |
| 413 | return (category & ufal::unilib::unicode::Z) != 0; |
| 414 | } |
| 415 | |
| 416 | static bool NotLNZ(char32_t ch) { |
| 417 | auto category = ufal::unilib::unicode::category(ch); |
| 418 | if (category & ufal::unilib::unicode::L) return false; |
| 419 | if (category & ufal::unilib::unicode::N) return false; |
| 420 | if (category & ufal::unilib::unicode::Z) return false; |
| 421 | return true; |
| 422 | } |
| 423 | |
| 424 | private: |
| 425 | std::u32string_view m_text; |
| 426 | }; |
| 427 | |