mirror of
https://github.com/ggerganov/whisper.cpp.git
synced 2024-12-30 09:18:51 +00:00
809 lines
30 KiB
C++
809 lines
30 KiB
C++
#include "unicode.h"
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#include "unicode-data.h"
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#include <cassert>
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#include <cstddef>
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#include <cstdint>
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#include <map>
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#include <regex>
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#include <stdexcept>
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#include <string>
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#include <unordered_map>
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#include <unordered_set>
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#include <utility>
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#include <vector>
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#include <locale>
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#include <codecvt>
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static std::string unicode_cpts_to_utf8(const std::vector<uint32_t> & cps) {
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std::string result;
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for (size_t i = 0; i < cps.size(); ++i) {
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result.append(unicode_cpt_to_utf8(cps[i]));
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}
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return result;
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}
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uint32_t unicode_cpt_from_utf8(const std::string & utf8, size_t & offset) {
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assert(offset < utf8.size());
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if (!(utf8[offset + 0] & 0x80)) {
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auto result = utf8[offset + 0];
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offset += 1;
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return result;
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}
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if (!(utf8[offset + 0] & 0x40)) {
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throw std::invalid_argument("invalid character");
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}
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if (!(utf8[offset + 0] & 0x20)) {
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if (offset + 1 >= utf8.size() || ! ((utf8[offset + 1] & 0xc0) == 0x80)) {
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throw std::invalid_argument("invalid character");
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}
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auto result = ((utf8[offset + 0] & 0x1f) << 6) | (utf8[offset + 1] & 0x3f);
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offset += 2;
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return result;
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}
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if (!(utf8[offset + 0] & 0x10)) {
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if (offset + 2 >= utf8.size() || ! ((utf8[offset + 1] & 0xc0) == 0x80) || ! ((utf8[offset + 2] & 0xc0) == 0x80)) {
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throw std::invalid_argument("invalid character");
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}
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auto result = ((utf8[offset + 0] & 0x0f) << 12) | ((utf8[offset + 1] & 0x3f) << 6) | (utf8[offset + 2] & 0x3f);
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offset += 3;
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return result;
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}
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if (!(utf8[offset + 0] & 0x08)) {
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if (offset + 3 >= utf8.size() || ! ((utf8[offset + 1] & 0xc0) == 0x80) || ! ((utf8[offset + 2] & 0xc0) == 0x80) || !((utf8[offset + 3] & 0xc0) == 0x80)) {
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throw std::invalid_argument("invalid character");
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}
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auto result = ((utf8[offset + 0] & 0x07) << 18) | ((utf8[offset + 1] & 0x3f) << 12) | ((utf8[offset + 2] & 0x3f) << 6) | (utf8[offset + 3] & 0x3f);
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offset += 4;
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return result;
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}
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throw std::invalid_argument("failed to convert utf8 to codepoint");
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}
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//static std::vector<uint16_t> unicode_cpt_to_utf16(uint32_t cp) {
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// std::vector<uint16_t> result;
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// if (/* 0x0000 <= cp && */ cp <= 0xffff) {
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// result.emplace_back(cp);
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// return result;
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// }
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// if (0x10000 <= cp && cp <= 0x10ffff) {
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// result.emplace_back(0xd800 | ((cp - 0x10000) >> 10));
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// result.emplace_back(0xdc00 | ((cp - 0x10000) & 0x03ff));
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// return result;
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// }
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// throw std::invalid_argument("failed to convert codepoint to utf16");
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//}
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//static std::vector<uint16_t> unicode_cpts_to_utf16(const std::vector<uint32_t> & cps) {
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// std::vector<uint16_t> result;
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// for (size_t i = 0; i < cps.size(); ++i) {
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// auto temp = unicode_cpt_to_utf16(cps[i]);
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// result.insert(result.end(), temp.begin(), temp.end());
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// }
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// return result;
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//}
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//static uint32_t unicode_cpt_from_utf16(const std::vector<uint16_t> & utf16, size_t & offset) {
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// assert(offset < utf16.size());
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// if (((utf16[0] >> 10) << 10) != 0xd800) {
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// auto result = utf16[offset + 0];
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// offset += 1;
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// return result;
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// }
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//
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// if (offset + 1 >= utf16.size() || !((utf16[1] & 0xdc00) == 0xdc00)) {
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// throw std::invalid_argument("invalid character");
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// }
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//
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// auto result = 0x10000 + (((utf16[0] & 0x03ff) << 10) | (utf16[1] & 0x03ff));
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// offset += 2;
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// return result;
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//}
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//static std::vector<uint32_t> unicode_cpts_from_utf16(const std::vector<uint16_t> & utf16) {
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// std::vector<uint32_t> result;
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// size_t offset = 0;
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// while (offset < utf16.size()) {
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// result.push_back(unicode_cpt_from_utf16(utf16, offset));
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// }
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// return result;
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//}
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static std::vector<codepoint_flags> unicode_cpt_flags_array() {
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std::vector<codepoint_flags> cpt_flags(MAX_CODEPOINTS, codepoint_flags::UNDEFINED);
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assert (unicode_ranges_flags.front().first == 0);
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assert (unicode_ranges_flags.back().first == MAX_CODEPOINTS);
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for (size_t i = 1; i < unicode_ranges_flags.size(); ++i) {
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const auto range_ini = unicode_ranges_flags[i-1]; // codepoint_ini, flags
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const auto range_end = unicode_ranges_flags[i]; // codepoint_end, flags
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for (uint32_t cpt = range_ini.first; cpt < range_end.first; ++cpt) {
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cpt_flags[cpt] = range_ini.second;
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}
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}
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for (auto cpt : unicode_set_whitespace) {
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cpt_flags[cpt].is_whitespace = true;
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}
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for (auto p : unicode_map_lowercase) {
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cpt_flags[p.second].is_lowercase = true;
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}
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for (auto p : unicode_map_uppercase) {
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cpt_flags[p.second].is_uppercase = true;
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}
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for (auto &range : unicode_ranges_nfd) { // start, last, nfd
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cpt_flags[range.nfd].is_nfd = true;
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}
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return cpt_flags;
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}
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static std::unordered_map<uint8_t, std::string> unicode_byte_to_utf8_map() {
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std::unordered_map<uint8_t, std::string> map;
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for (int ch = 0x21; ch <= 0x7E; ++ch) { // u'!' to u'~'
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assert(0 <= ch && ch < 256);
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map[ch] = unicode_cpt_to_utf8(ch);
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}
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for (int ch = 0xA1; ch <= 0xAC; ++ch) { // u'¡' to u'¬'
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assert(0 <= ch && ch < 256);
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map[ch] = unicode_cpt_to_utf8(ch);
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}
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for (int ch = 0xAE; ch <= 0xFF; ++ch) { // u'®' to u'ÿ'
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assert(0 <= ch && ch < 256);
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map[ch] = unicode_cpt_to_utf8(ch);
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}
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auto n = 0;
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for (int ch = 0; ch < 256; ++ch) {
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if (map.find(ch) == map.end()) {
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map[ch] = unicode_cpt_to_utf8(256 + n);
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++n;
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}
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}
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return map;
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}
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static std::unordered_map<std::string, uint8_t> unicode_utf8_to_byte_map() {
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std::unordered_map<std::string, uint8_t> map;
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for (int ch = 0x21; ch <= 0x7E; ++ch) { // u'!' to u'~'
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assert(0 <= ch && ch < 256);
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map[unicode_cpt_to_utf8(ch)] = ch;
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}
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for (int ch = 0xA1; ch <= 0xAC; ++ch) { // u'¡' to u'¬'
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assert(0 <= ch && ch < 256);
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map[unicode_cpt_to_utf8(ch)] = ch;
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}
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for (int ch = 0xAE; ch <= 0xFF; ++ch) { // u'®' to u'ÿ'
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assert(0 <= ch && ch < 256);
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map[unicode_cpt_to_utf8(ch)] = ch;
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}
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auto n = 0;
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for (int ch = 0; ch < 256; ++ch) {
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if (map.find(unicode_cpt_to_utf8(ch)) == map.end()) {
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map[unicode_cpt_to_utf8(256 + n)] = ch;
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++n;
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}
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}
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return map;
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}
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static inline std::wstring unicode_wstring_from_utf8(const std::string & s) {
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std::wstring_convert<std::codecvt_utf8<wchar_t>> conv;
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return conv.from_bytes(s);
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}
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static std::vector<std::string> unicode_byte_encoding_process(const std::vector<std::string> & bpe_words) {
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std::vector<std::string> bpe_encoded_words;
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for (const auto & word : bpe_words) {
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std::string text_utf;
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auto utf_word = unicode_cpts_from_utf8(word);
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for (size_t i = 0; i < utf_word.size(); ++i) {
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text_utf += unicode_cpt_to_utf8(utf_word[i]);
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}
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std::string encoded_token;
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for (char & c : text_utf) {
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encoded_token += unicode_byte_to_utf8(c);
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}
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bpe_encoded_words.emplace_back(encoded_token);
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}
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return bpe_encoded_words;
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}
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// GPT2 system regex: 's|'t|'re|'ve|'m|'ll|'d| ?\p{L}+| ?\p{N}+| ?[^\s\p{L}\p{N}]+|\s+(?!\S)|\s+
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static std::vector<size_t> unicode_regex_split_custom_gpt2(const std::string & text, const std::vector<size_t> & offsets) {
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std::vector<size_t> bpe_offsets; // store the offset of each word
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bpe_offsets.reserve(offsets.size()); // Reserve memory for the approximate size
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const auto cpts = unicode_cpts_from_utf8(text);
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size_t start = 0;
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for (auto offset : offsets) {
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const size_t offset_ini = start;
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const size_t offset_end = start + offset;
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assert(offset_end <= cpts.size());
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start = offset_end;
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static const uint32_t OUT_OF_RANGE = 0xFFFFFFFF;
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auto _get_cpt = [&] (const size_t pos) -> uint32_t {
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return (offset_ini <= pos && pos < offset_end) ? cpts[pos] : OUT_OF_RANGE;
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};
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auto _get_flags = [&] (const size_t pos) -> codepoint_flags {
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return (offset_ini <= pos && pos < offset_end) ? unicode_cpt_flags(cpts[pos]) : codepoint_flags{};
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};
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size_t _prev_end = offset_ini;
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auto _add_token = [&] (const size_t end) -> size_t {
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assert(_prev_end <= end && end <= offset_end);
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size_t len = end - _prev_end;
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if (len > 0) {
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bpe_offsets.push_back(len);
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}
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_prev_end = end;
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//if (len > 0) {
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// std::string s = "";
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// for(size_t p = end-len; p < end; p++)
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// s += unicode_cpt_to_utf8(cpts[p]);
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// printf(">>> '%s'\n", s.c_str());
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//}
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return len;
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};
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for (size_t pos = offset_ini; pos < offset_end; /*pos++*/ ) {
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const uint32_t cpt = _get_cpt(pos);
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const auto flags = _get_flags(pos);
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// regex: 's|'t|'re|'ve|'m|'ll|'d
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if (cpt == '\'' && pos+1 < offset_end) {
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uint32_t cpt_next = _get_cpt(pos+1);
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if (cpt_next == 's' || cpt_next == 't' || cpt_next == 'm' || cpt_next == 'd') {
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pos += _add_token(pos+2);
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continue;
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}
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if (pos+2 < offset_end) {
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uint32_t cpt_next_next = _get_cpt(pos+2);
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if ((cpt_next == 'r' && cpt_next_next == 'e') ||
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(cpt_next == 'v' && cpt_next_next == 'e') ||
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(cpt_next == 'l' && cpt_next_next == 'l')) {
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pos += _add_token(pos+3);
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continue;
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}
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}
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}
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auto flags2 = (cpt == ' ' ? _get_flags(pos+1) : flags);
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// regex: <space>?\p{L}+
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if (flags2.is_letter) {
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pos += (cpt == ' ');
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while (flags2.is_letter) {
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flags2 = _get_flags(++pos);
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}
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_add_token(pos);
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continue;
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}
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// regex: <space>?\p{N}+
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if (flags2.is_number) {
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pos += (cpt == ' ');
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while (flags2.is_number) {
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flags2 = _get_flags(++pos);
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}
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_add_token(pos);
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continue;
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}
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// regex: <space>?[^\s\p{L}\p{N}]+
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if (!(flags2.is_whitespace | flags2.is_letter | flags2.is_number) && flags2.as_uint()) {
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pos += (cpt == ' ');
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while (!(flags2.is_whitespace | flags2.is_letter | flags2.is_number) && flags2.as_uint()) {
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flags2 = _get_flags(++pos);
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}
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_add_token(pos);
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continue;
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}
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size_t num_whitespaces = 0;
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while (_get_flags(pos+num_whitespaces).is_whitespace) {
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num_whitespaces++;
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}
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// regex: \s+(?!\S)
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if (num_whitespaces > 1 && _get_cpt(pos+num_whitespaces) != OUT_OF_RANGE) {
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pos += num_whitespaces - 1;
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_add_token(pos);
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continue;
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}
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// regex: \s+
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if (num_whitespaces > 0) {
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pos += num_whitespaces;
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_add_token(pos);
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continue;
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}
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// no matches
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_add_token(++pos);
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}
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}
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return bpe_offsets;
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}
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// LLAMA3 system regex: "(?i:'s|'t|'re|'ve|'m|'ll|'d)|[^\r\n\p{L}\p{N}]?\p{L}+|\p{N}{1,3}| ?[^\s\p{L}\p{N}]+[\r\n]*|\s*[\r\n]+|\s+(?!\S)|\s+"
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static std::vector<size_t> unicode_regex_split_custom_llama3(const std::string & text, const std::vector<size_t> & offsets) {
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std::vector<size_t> bpe_offsets; // store the offset of each word
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bpe_offsets.reserve(offsets.size()); // Reserve memory for the approximate size
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const auto cpts = unicode_cpts_from_utf8(text);
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size_t start = 0;
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for (auto offset : offsets) {
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const size_t offset_ini = start;
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const size_t offset_end = start + offset;
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assert(offset_end <= cpts.size());
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start = offset_end;
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static const uint32_t OUT_OF_RANGE = 0xFFFFFFFF;
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auto _get_cpt = [&] (const size_t pos) -> uint32_t {
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return (offset_ini <= pos && pos < offset_end) ? cpts[pos] : OUT_OF_RANGE;
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};
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auto _get_flags = [&] (const size_t pos) -> codepoint_flags {
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return (offset_ini <= pos && pos < offset_end) ? unicode_cpt_flags(cpts[pos]) : codepoint_flags{};
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};
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size_t _prev_end = offset_ini;
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auto _add_token = [&] (const size_t end) -> size_t {
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assert(_prev_end <= end && end <= offset_end);
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size_t len = end - _prev_end;
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if (len > 0) {
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bpe_offsets.push_back(len);
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}
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_prev_end = end;
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//if (len > 0) {
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// std::string s = "";
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// for(size_t p = end-len; p < end; p++)
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// s += unicode_cpt_to_utf8(cpts[p]);
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// printf(">>> '%s'\n", s.c_str());
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//}
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return len;
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};
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for (size_t pos = offset_ini; pos < offset_end; /*pos++*/ ) {
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const uint32_t cpt = _get_cpt(pos);
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const auto flags = _get_flags(pos);
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// regex: (?i:'s|'t|'re|'ve|'m|'ll|'d) // case insensitive
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if (cpt == '\'' && pos+1 < offset_end) {
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uint32_t cpt_next = unicode_tolower(_get_cpt(pos+1));
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if (cpt_next == 's' || cpt_next == 't' || cpt_next == 'm' || cpt_next == 'd') {
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pos += _add_token(pos+2);
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continue;
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}
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if (pos+2 < offset_end) {
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uint32_t cpt_next_next = unicode_tolower(_get_cpt(pos+2));
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if ((cpt_next == 'r' && cpt_next_next == 'e') ||
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(cpt_next == 'v' && cpt_next_next == 'e') ||
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(cpt_next == 'l' && cpt_next_next == 'l')) {
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pos += _add_token(pos+3);
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continue;
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}
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}
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}
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// regex: [^\r\n\p{L}\p{N}]?\p{L}+
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if (!(cpt == '\r' || cpt == '\n' || flags.is_number)) {
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if (flags.is_letter || _get_flags(pos+1).is_letter) { // one or more letters
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pos++;
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while (_get_flags(pos).is_letter) {
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pos++;
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}
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_add_token(pos);
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continue;
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}
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}
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// regex: \p{N}{1,3}
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if (flags.is_number) {
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size_t ini = pos;
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while (_get_flags(pos).is_number) {
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if (++pos - ini >= 3 ) {
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_add_token(pos);
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ini = pos;
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}
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}
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_add_token(pos);
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continue;
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}
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// regex: <space>?[^\s\p{L}\p{N}]+[\r\n]*
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auto flags2 = (cpt == ' ' ? _get_flags(pos+1) : flags);
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if (!(flags2.is_whitespace | flags2.is_letter | flags2.is_number) && flags.as_uint()) {
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pos += (cpt == ' ');
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while (!(flags2.is_whitespace | flags2.is_letter | flags2.is_number) && flags2.as_uint()) {
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flags2 = _get_flags(++pos);
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}
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uint32_t cpt2 = _get_cpt(pos);
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while (cpt2 == '\r' || cpt2 == '\n') {
|
|
cpt2 = _get_cpt(++pos);
|
|
}
|
|
_add_token(pos);
|
|
continue;
|
|
}
|
|
|
|
size_t num_whitespaces = 0;
|
|
size_t last_end_r_or_n = 0;
|
|
while (_get_flags(pos+num_whitespaces).is_whitespace) {
|
|
uint32_t cpt2 = _get_cpt(pos+num_whitespaces);
|
|
if (cpt2 == '\r' || cpt2 == '\n') {
|
|
last_end_r_or_n = pos + num_whitespaces + 1;
|
|
}
|
|
num_whitespaces++;
|
|
}
|
|
|
|
// regex: \s*[\r\n]+
|
|
if (last_end_r_or_n > 0) {
|
|
pos = last_end_r_or_n;
|
|
_add_token(pos);
|
|
continue;
|
|
}
|
|
|
|
// regex: \s+(?!\S)
|
|
if (num_whitespaces > 1 && _get_cpt(pos+num_whitespaces) != OUT_OF_RANGE) {
|
|
pos += num_whitespaces - 1;
|
|
_add_token(pos);
|
|
continue;
|
|
}
|
|
|
|
// regex: \s+
|
|
if (num_whitespaces > 0) {
|
|
pos += num_whitespaces;
|
|
_add_token(pos);
|
|
continue;
|
|
}
|
|
|
|
// no matches
|
|
_add_token(++pos);
|
|
}
|
|
}
|
|
|
|
return bpe_offsets;
|
|
}
|
|
|
|
// use std::wregex to split the text
|
|
static std::vector<size_t> unicode_regex_split_stl(const std::wstring & wtext, const std::wstring & regex_expr, const std::vector<size_t> & offsets) {
|
|
std::wregex expr(regex_expr);
|
|
std::vector<size_t> bpe_offsets; // store the offset of each word
|
|
bpe_offsets.reserve(offsets.size()); // Reserve memory for the approximate size
|
|
size_t start = 0;
|
|
for (auto offset : offsets) {
|
|
std::wcregex_iterator it(wtext.data() + start, wtext.data() + start + offset, expr);
|
|
std::wcregex_iterator end;
|
|
|
|
int64_t start_idx = 0;
|
|
while (it != end) {
|
|
std::wcmatch match = *it;
|
|
if (match.position() > start_idx) {
|
|
bpe_offsets.emplace_back(match.position() - start_idx);
|
|
}
|
|
bpe_offsets.emplace_back(match.length());
|
|
start_idx = match.position() + match.length();
|
|
++it;
|
|
}
|
|
|
|
if (start_idx < (int64_t) offset) {
|
|
bpe_offsets.emplace_back(offset - start_idx);
|
|
}
|
|
start += offset;
|
|
}
|
|
|
|
return bpe_offsets;
|
|
}
|
|
|
|
// use std::regex to split the text
|
|
static std::vector<size_t> unicode_regex_split_stl(const std::string & text, const std::string & regex_expr, const std::vector<size_t> & offsets) {
|
|
std::regex expr(regex_expr);
|
|
std::vector<size_t> bpe_offsets; // store the offset of each word
|
|
bpe_offsets.reserve(offsets.size()); // Reserve memory for the approximate size
|
|
size_t start = 0;
|
|
for (auto offset : offsets) {
|
|
std::cregex_iterator it(text.data() + start, text.data() + start + offset, expr);
|
|
std::cregex_iterator end;
|
|
|
|
int64_t start_idx = 0;
|
|
while (it != end) {
|
|
std::cmatch match = *it;
|
|
if (match.position() > start_idx) {
|
|
bpe_offsets.emplace_back(match.position() - start_idx);
|
|
}
|
|
bpe_offsets.emplace_back(match.length());
|
|
start_idx = match.position() + match.length();
|
|
++it;
|
|
}
|
|
|
|
if (start_idx < (int64_t) offset) {
|
|
bpe_offsets.emplace_back(offset - start_idx);
|
|
}
|
|
start += offset;
|
|
}
|
|
|
|
return bpe_offsets;
|
|
}
|
|
|
|
static std::vector<size_t> unicode_regex_split_custom(const std::string & text, const std::string & regex_expr, const std::vector<size_t> & offsets) {
|
|
std::vector<size_t> bpe_offsets;
|
|
|
|
if (regex_expr == "'s|'t|'re|'ve|'m|'ll|'d| ?\\p{L}+| ?\\p{N}+| ?[^\\s\\p{L}\\p{N}]+|\\s+(?!\\S)") {
|
|
bpe_offsets = unicode_regex_split_custom_gpt2(text, offsets);
|
|
} else if (
|
|
regex_expr == "(?i:'s|'t|'re|'ve|'m|'ll|'d)|[^\\r\\n\\p{L}\\p{N}]?\\p{L}+|\\p{N}{1,3}| ?[^\\s\\p{L}\\p{N}]+[\\r\\n]*|\\s*[\\r\\n]+|\\s+(?!\\S)|\\s+" ||
|
|
regex_expr == "(?:'[sS]|'[tT]|'[rR][eE]|'[vV][eE]|'[mM]|'[lL][lL]|'[dD])|[^\\r\\n\\p{L}\\p{N}]?\\p{L}+|\\p{N}{1,3}| ?[^\\s\\p{L}\\p{N}]+[\\r\\n]*|\\s*[\\r\\n]+|\\s+(?!\\S)|\\s+") {
|
|
|
|
bpe_offsets = unicode_regex_split_custom_llama3(text, offsets);
|
|
}
|
|
|
|
return bpe_offsets;
|
|
}
|
|
|
|
//
|
|
// interface
|
|
//
|
|
|
|
std::string unicode_cpt_to_utf8(uint32_t cp) {
|
|
std::string result;
|
|
|
|
if (/* 0x00 <= cp && */ cp <= 0x7f) {
|
|
result.push_back(cp);
|
|
return result;
|
|
}
|
|
if (0x80 <= cp && cp <= 0x7ff) {
|
|
result.push_back(0xc0 | ((cp >> 6) & 0x1f));
|
|
result.push_back(0x80 | (cp & 0x3f));
|
|
return result;
|
|
}
|
|
if (0x800 <= cp && cp <= 0xffff) {
|
|
result.push_back(0xe0 | ((cp >> 12) & 0x0f));
|
|
result.push_back(0x80 | ((cp >> 6) & 0x3f));
|
|
result.push_back(0x80 | (cp & 0x3f));
|
|
return result;
|
|
}
|
|
if (0x10000 <= cp && cp <= 0x10ffff) {
|
|
result.push_back(0xf0 | ((cp >> 18) & 0x07));
|
|
result.push_back(0x80 | ((cp >> 12) & 0x3f));
|
|
result.push_back(0x80 | ((cp >> 6) & 0x3f));
|
|
result.push_back(0x80 | (cp & 0x3f));
|
|
return result;
|
|
}
|
|
|
|
throw std::invalid_argument("invalid codepoint");
|
|
}
|
|
|
|
std::vector<uint32_t> unicode_cpts_normalize_nfd(const std::vector<uint32_t> & cpts) {
|
|
auto comp = [] (const uint32_t cpt, const range_nfd & range) {
|
|
return cpt < range.first;
|
|
};
|
|
std::vector<uint32_t> result(cpts.size());
|
|
for (size_t i = 0; i < cpts.size(); ++i) {
|
|
const uint32_t cpt = cpts[i];
|
|
auto it = std::upper_bound(unicode_ranges_nfd.cbegin(), unicode_ranges_nfd.cend(), cpt, comp) - 1;
|
|
result[i] = (it->first <= cpt && cpt <= it->last) ? it->nfd : cpt;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
std::vector<uint32_t> unicode_cpts_from_utf8(const std::string & utf8) {
|
|
std::vector<uint32_t> result;
|
|
result.reserve(utf8.size());
|
|
size_t offset = 0;
|
|
while (offset < utf8.size()) {
|
|
result.push_back(unicode_cpt_from_utf8(utf8, offset));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
codepoint_flags unicode_cpt_flags(const uint32_t cp) {
|
|
static const codepoint_flags undef(codepoint_flags::UNDEFINED);
|
|
static const auto cpt_flags = unicode_cpt_flags_array();
|
|
return cp < cpt_flags.size() ? cpt_flags[cp] : undef;
|
|
}
|
|
|
|
codepoint_flags unicode_cpt_flags(const std::string & utf8) {
|
|
static const codepoint_flags undef(codepoint_flags::UNDEFINED);
|
|
if (utf8.empty()) {
|
|
return undef; // undefined
|
|
}
|
|
size_t offset = 0;
|
|
return unicode_cpt_flags(unicode_cpt_from_utf8(utf8, offset));
|
|
}
|
|
|
|
std::string unicode_byte_to_utf8(uint8_t byte) {
|
|
static std::unordered_map<uint8_t, std::string> map = unicode_byte_to_utf8_map();
|
|
return map.at(byte);
|
|
}
|
|
|
|
uint8_t unicode_utf8_to_byte(const std::string & utf8) {
|
|
static std::unordered_map<std::string, uint8_t> map = unicode_utf8_to_byte_map();
|
|
return map.at(utf8);
|
|
}
|
|
|
|
uint32_t unicode_tolower(uint32_t cp) {
|
|
auto it = unicode_map_lowercase.find(cp);
|
|
return it == unicode_map_lowercase.end() ? cp : it->second;
|
|
}
|
|
|
|
std::vector<std::string> unicode_regex_split(const std::string & text, const std::vector<std::string> & regex_exprs) {
|
|
// unicode categories
|
|
static const std::map<std::string, int> k_ucat_enum = {
|
|
{ "\\p{N}", codepoint_flags::NUMBER },
|
|
{ "\\p{L}", codepoint_flags::LETTER },
|
|
{ "\\p{P}", codepoint_flags::PUNCTUATION },
|
|
};
|
|
|
|
static const std::map<int, int> k_ucat_cpt = {
|
|
{ codepoint_flags::NUMBER, 0xD1 },
|
|
{ codepoint_flags::LETTER, 0xD2 },
|
|
{ codepoint_flags::PUNCTUATION, 0xD3 },
|
|
};
|
|
|
|
static const std::map<int, std::string> k_ucat_map = {
|
|
{ codepoint_flags::NUMBER, "\x30-\x39" }, // 0-9
|
|
{ codepoint_flags::LETTER, "\x41-\x5A\x61-\x7A" }, // A-Za-z
|
|
{ codepoint_flags::PUNCTUATION, "\x21-\x23\x25-\x2A\x2C-\x2F\x3A-\x3B\x3F-\x40\\\x5B-\\\x5D\x5F\\\x7B\\\x7D" }, // !-#%-*,-/:-;?-@\[-\]_\{\}
|
|
};
|
|
|
|
// compute collapsed codepoints only if needed by at least one regex
|
|
bool need_collapse = false;
|
|
for (auto & regex_expr : regex_exprs) {
|
|
// search for unicode categories
|
|
for (const auto & ucat : k_ucat_enum) {
|
|
if (std::string::npos != regex_expr.find(ucat.first)) {
|
|
need_collapse = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
const auto cpts = unicode_cpts_from_utf8(text);
|
|
|
|
// generate a "collapsed" representation of the text, where all codepoints are replaced by a single byte
|
|
// ref: https://github.com/ggerganov/llama.cpp/pull/6920#issuecomment-2081479935
|
|
std::string text_collapsed;
|
|
if (need_collapse) {
|
|
// collapse all unicode categories
|
|
text_collapsed.resize(cpts.size());
|
|
|
|
for (size_t i = 0; i < cpts.size(); ++i) {
|
|
// keep single-byte codepoints as is
|
|
if (cpts[i] < 128) {
|
|
text_collapsed[i] = cpts[i];
|
|
continue;
|
|
}
|
|
|
|
const auto flags = unicode_cpt_flags(cpts[i]);
|
|
|
|
if (flags.is_whitespace) {
|
|
//NOTE: C++ std::regex \s does not mach 0x85, Rust and Python regex does.
|
|
//text_collapsed[i] = (char) 0x85; // <Next Line> as whitespace fallback
|
|
text_collapsed[i] = (char) 0x0B; // <vertical tab> as whitespace fallback
|
|
} else if (k_ucat_cpt.find(flags.category_flag()) != k_ucat_cpt.end()) {
|
|
text_collapsed[i] = k_ucat_cpt.at(flags.category_flag());
|
|
} else {
|
|
text_collapsed[i] = (char) 0xD0; // fallback
|
|
}
|
|
}
|
|
}
|
|
|
|
std::vector<size_t> bpe_offsets = { cpts.size() };
|
|
|
|
for (auto & regex_expr : regex_exprs) {
|
|
// first, see if we have an efficient custom regex implementation
|
|
auto tmp = unicode_regex_split_custom(text, regex_expr, bpe_offsets);
|
|
|
|
if (!tmp.empty()) {
|
|
bpe_offsets = std::move(tmp);
|
|
continue;
|
|
}
|
|
|
|
// fallback to general-purpose std::regex / std::wregex
|
|
try {
|
|
// if a unicode category is used in the regex, we use the collapsed text and replace the unicode category
|
|
// with the corresponding collapsed representation
|
|
bool use_collapsed = false;
|
|
for (auto & ucat : k_ucat_enum) {
|
|
if (std::string::npos != regex_expr.find(ucat.first)) {
|
|
use_collapsed = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (use_collapsed) {
|
|
// sanity-check that the original regex does not contain any non-ASCII characters
|
|
const auto cpts_regex = unicode_cpts_from_utf8(regex_expr);
|
|
for (size_t i = 0; i < cpts_regex.size(); ++i) {
|
|
if (cpts_regex[i] >= 128) {
|
|
throw std::runtime_error("Regex includes both unicode categories and non-ASCII characters - not supported");
|
|
}
|
|
}
|
|
|
|
// generate a collapsed representation of the regex
|
|
std::string regex_expr_collapsed;
|
|
|
|
// track if we are inside [], because nested [] are not allowed
|
|
bool inside = false;
|
|
for (size_t i = 0; i < regex_expr.size(); ++i) {
|
|
if (regex_expr[i] == '[' && (i == 0 || regex_expr[i - 1] != '\\')) {
|
|
regex_expr_collapsed += '[';
|
|
inside = true;
|
|
continue;
|
|
}
|
|
|
|
if (inside && regex_expr[i] == ']' && regex_expr[i - 1] != '\\') {
|
|
regex_expr_collapsed += ']';
|
|
inside = false;
|
|
continue;
|
|
}
|
|
|
|
if (regex_expr[i + 0] == '\\' && i + 4 < regex_expr.size() &&
|
|
regex_expr[i + 1] == 'p' &&
|
|
regex_expr[i + 2] == '{' &&
|
|
regex_expr[i + 4] == '}') {
|
|
const std::string pat = regex_expr.substr(i, 5);
|
|
if (k_ucat_enum.find(pat) != k_ucat_enum.end()) {
|
|
if (!inside) {
|
|
regex_expr_collapsed += '[';
|
|
}
|
|
regex_expr_collapsed += k_ucat_cpt.at(k_ucat_enum.at(pat));
|
|
regex_expr_collapsed += k_ucat_map.at(k_ucat_enum.at(pat));
|
|
if (!inside) {
|
|
regex_expr_collapsed += ']';
|
|
}
|
|
i += 4;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
regex_expr_collapsed += regex_expr[i];
|
|
}
|
|
|
|
//printf("text_collapsed: %s\n", text_collapsed.c_str());
|
|
//printf("regex_expr_collapsed: %s\n", regex_expr_collapsed.c_str());
|
|
bpe_offsets = unicode_regex_split_stl(text_collapsed, regex_expr_collapsed, bpe_offsets);
|
|
} else {
|
|
// no unicode category used, we can use std::wregex directly
|
|
const std::wstring wregex_expr = unicode_wstring_from_utf8(regex_expr);
|
|
|
|
// std::wregex \s does not mach non-ASCII whitespaces, using 0x0B as fallback
|
|
std::wstring wtext(cpts.begin(), cpts.end());
|
|
for (size_t i = 0; i < wtext.size(); ++i) {
|
|
if (wtext[i] > 0x7F && unicode_cpt_flags(wtext[i]).is_whitespace) {
|
|
wtext[i] = 0x0B;
|
|
}
|
|
}
|
|
|
|
//printf("text: %s\n", text.c_str());
|
|
//printf("regex_expr: %s\n", regex_expr.c_str());
|
|
bpe_offsets = unicode_regex_split_stl(wtext, wregex_expr, bpe_offsets);
|
|
}
|
|
} catch (std::regex_error & e) {
|
|
fprintf(stderr, "Failed to process regex: '%s'\n", regex_expr.c_str());
|
|
fprintf(stderr, "Regex error: %s\n", e.what());
|
|
throw std::runtime_error("Failed to process regex");
|
|
}
|
|
}
|
|
|
|
std::vector<std::string> bpe_words;
|
|
bpe_words.reserve(bpe_offsets.size()); // reserve memory for the approximate size
|
|
|
|
size_t start = 0;
|
|
for (size_t & offset : bpe_offsets) {
|
|
bpe_words.emplace_back();
|
|
for (size_t i = start; i < start + offset; ++i) {
|
|
bpe_words.back() += unicode_cpt_to_utf8(cpts[i]);
|
|
}
|
|
start += offset;
|
|
}
|
|
|
|
return unicode_byte_encoding_process(bpe_words);
|
|
}
|