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Fix bpe_gpt2_preprocess #5446

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98d5d20
Fix bpe_gpt2_preprocess
bobqianic Feb 10, 2024
e5dfeda
remove static
bobqianic Feb 10, 2024
0da1e9c
Update test-tokenizer-0-falcon.cpp
bobqianic Feb 12, 2024
0c612e5
Remove trailing whitespace in test-tokenizer-0-falcon.cpp
bobqianic Feb 12, 2024
0e5b25b
fix bugs
bobqianic Feb 13, 2024
7570bbc
Add files via upload
bobqianic Feb 13, 2024
861f544
fix typo
bobqianic Feb 13, 2024
69aaa24
Add files via upload
bobqianic Feb 14, 2024
bb2e1e8
Update llama.cpp
bobqianic Feb 14, 2024
49bba30
Merge pull request #1 from bobqianic/fix
bobqianic Feb 14, 2024
3cd3964
Merge branch 'master' into master
bobqianic Feb 14, 2024
9d04f3b
Update unicode.h
bobqianic Feb 14, 2024
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213 changes: 100 additions & 113 deletions llama.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -8181,134 +8181,121 @@ struct llm_tokenizer_bpe {
work_queue.push(bigram);
}

std::vector<std::string> bpe_gpt2_preprocess(const std::string & text) {
// 's|'t|'re|'ve|'m|'ll|'d| ?\p{L}+| ?\p{N}+| ?[^\s\p{L}\p{N}]+|\s+(?!\S)|\s+
static std::vector<std::string> bpe_gpt2_preprocess(const std::string & text) {
std::vector<std::string> bpe_words;
std::vector<std::string> bpe_encoded_words;

std::string token = "";
// GPT2 system regex: 's|'t|'re|'ve|'m|'ll|'d| ?\p{L}+| ?\p{N}+| ?[^\s\p{L}\p{N}]+|\s+(?!\S)|\s+
bool collecting_numeric = false;
bool collecting_letter = false;
bool collecting_special = false;
bool collecting_whitespace_lookahead = false;
bool collecting = false;

std::vector<std::string> text_utf;
text_utf.reserve(text.size());
bpe_words.reserve(text.size());
bpe_encoded_words.reserve(text.size());

std::vector<std::string> text_utf8;

auto cps = codepoints_from_utf8(text);
for (size_t i = 0; i < cps.size(); ++i)
text_utf.emplace_back(codepoint_to_utf8(cps[i]));

for (int i = 0; i < (int)text_utf.size(); i++) {
const std::string & utf_char = text_utf[i];
bool split_condition = false;
int bytes_remain = text_utf.size() - i;
text_utf8.reserve(cps.size());

for (auto cp : cps) {
text_utf8.emplace_back(codepoint_to_utf8(cp));
}

size_t i = 0;
while (i < text_utf8.size()) {
const std::string & utf8_char = text_utf8[i];
size_t bytes_remain = text_utf8.size() - i;
// forward backward lookups
const std::string & utf_char_next = (i + 1 < (int)text_utf.size()) ? text_utf[i + 1] : "";
const std::string & utf_char_next_next = (i + 2 < (int)text_utf.size()) ? text_utf[i + 2] : "";

// handling contractions
if (!split_condition && bytes_remain >= 2) {
// 's|'t|'m|'d
if (utf_char == "\'" && (utf_char_next == "s" || utf_char_next == "t" || utf_char_next == "m" || utf_char_next == "d")) {
split_condition = true;
}
if (split_condition) {
if (token.size()) {
bpe_words.emplace_back(token); // push previous content as token
}
token = utf_char + utf_char_next;
bpe_words.emplace_back(token);
token = "";
i++;
continue;
}
}
if (!split_condition && bytes_remain >= 3) {
// 're|'ve|'ll
if (utf_char == "\'" && (
(utf_char_next == "r" && utf_char_next_next == "e") ||
(utf_char_next == "v" && utf_char_next_next == "e") ||
(utf_char_next == "l" && utf_char_next_next == "l"))
) {
split_condition = true;
}
if (split_condition) {
// current token + next token can be defined
if (token.size()) {
bpe_words.emplace_back(token); // push previous content as token
}
token = utf_char + utf_char_next + utf_char_next_next;
bpe_words.emplace_back(token); // the contraction
token = "";
const std::string & utf8_char_next = (i + 1 < text_utf8.size()) ? text_utf8[i + 1] : "";
const std::string & utf8_char_next_next = (i + 2 < text_utf8.size()) ? text_utf8[i + 2] : "";

bool collect_letter = false;
bool collect_number = false;
bool collect_special = false;
bool collect_whitespace = false;

//'s|'t|'re|'ve|'m|'ll|'d
if (utf8_char == "'") {
if (utf8_char_next == "s" || utf8_char_next == "t" || utf8_char_next == "m" || utf8_char_next == "d") {
bpe_words.push_back(utf8_char+utf8_char_next);
i += 2;
continue;
} else if (((utf8_char_next == "r" || utf8_char_next == "v") && utf8_char_next_next == "e") || (utf8_char_next == "l" && utf8_char_next_next == "l")) {
bpe_words.push_back(utf8_char+utf8_char_next+utf8_char_next_next);
i += 3;
continue;
}
}

if (!split_condition && !collecting) {
if (codepoint_type(utf_char) == CODEPOINT_TYPE_LETTER || (!token.size() && utf_char == " " && codepoint_type(utf_char_next) == CODEPOINT_TYPE_LETTER)) {
collecting_letter = true;
collecting = true;
}
else if (codepoint_type(utf_char) == CODEPOINT_TYPE_DIGIT || (!token.size() && utf_char == " " && codepoint_type(utf_char_next) == CODEPOINT_TYPE_DIGIT)) {
collecting_numeric = true;
collecting = true;
}
else if (
((codepoint_type(utf_char) != CODEPOINT_TYPE_LETTER && codepoint_type(utf_char) != CODEPOINT_TYPE_DIGIT) && (codepoint_type(utf_char) != CODEPOINT_TYPE_WHITESPACE)) ||
(!token.size() && utf_char == " " && codepoint_type(utf_char_next) != CODEPOINT_TYPE_LETTER && codepoint_type(utf_char_next) != CODEPOINT_TYPE_DIGIT && codepoint_type(utf_char_next) != CODEPOINT_TYPE_WHITESPACE)
) {
collecting_special = true;
collecting = true;
}
else if (codepoint_type(utf_char) == CODEPOINT_TYPE_WHITESPACE && codepoint_type(utf_char_next) == CODEPOINT_TYPE_WHITESPACE) {
collecting_whitespace_lookahead = true;
collecting = true;
}
else if (codepoint_type(utf_char) == CODEPOINT_TYPE_WHITESPACE) {
split_condition = true;
}
}
else if (!split_condition && collecting) {
if (collecting_letter && codepoint_type(utf_char) != CODEPOINT_TYPE_LETTER) {
split_condition = true;
}
else if (collecting_numeric && codepoint_type(utf_char) != CODEPOINT_TYPE_DIGIT) {
split_condition = true;

auto codepoint_type_utf8_char = codepoint_type(utf8_char);
auto codepoint_type_utf8_char_next = codepoint_type(utf8_char_next);
auto utf8_char_is_whitespace = codepoint_is_whitespace(utf8_char);
auto utf8_char_next_is_whitespace = codepoint_is_whitespace(utf8_char_next);
std::string word;
std::string buffer;
std::string buffer_next;

if (codepoint_type_utf8_char == CODEPOINT_TYPE_LETTER || (utf8_char == " " && codepoint_type_utf8_char_next == CODEPOINT_TYPE_LETTER)) { // ?\p{L}+
collect_letter = true;
} else if (codepoint_type_utf8_char == CODEPOINT_TYPE_NUMBER || (utf8_char == " " && codepoint_type_utf8_char_next == CODEPOINT_TYPE_NUMBER)) { // ?\p{N}+
collect_number = true;
} else if ((!utf8_char_is_whitespace && codepoint_type_utf8_char != CODEPOINT_TYPE_LETTER && codepoint_type_utf8_char != CODEPOINT_TYPE_NUMBER) || (utf8_char == " " && !utf8_char_next_is_whitespace && codepoint_type_utf8_char_next != CODEPOINT_TYPE_LETTER && codepoint_type_utf8_char_next != CODEPOINT_TYPE_NUMBER)) { // ?[^\s\p{L}\p{N}]+
collect_special = true;
} else if (utf8_char_is_whitespace) { //\s+(?!\S)|\s+
collect_whitespace = true;
}

if (collect_letter || collect_number || collect_special || collect_whitespace) {
word += utf8_char;
i++;
}

if (collect_letter) {
while (i < text_utf8.size()) {
if (codepoint_type(buffer) == CODEPOINT_TYPE_LETTER) {
word += buffer;
i++;
} else {
break;
}
}
else if (collecting_special && (codepoint_type(utf_char) == CODEPOINT_TYPE_LETTER || codepoint_type(utf_char) == CODEPOINT_TYPE_DIGIT || codepoint_type(utf_char) == CODEPOINT_TYPE_WHITESPACE)) {
split_condition = true;
} else if (collect_number) {
while (i < text_utf8.size()) {
buffer = text_utf8[i];
if (codepoint_type(buffer) == CODEPOINT_TYPE_NUMBER) {
word += buffer;
i++;
} else {
break;
}
}
else if (collecting_whitespace_lookahead && (codepoint_type(utf_char_next) == CODEPOINT_TYPE_LETTER || codepoint_type(utf_char_next) == CODEPOINT_TYPE_DIGIT)) {
split_condition = true;
} else if (collect_special) {
while (i < text_utf8.size()) {
buffer = text_utf8[i];
auto codepoint_type_buffer = codepoint_type(buffer);
auto buffer_is_whitespace = codepoint_is_whitespace(buffer);
if (!buffer_is_whitespace && codepoint_type_buffer != CODEPOINT_TYPE_LETTER && codepoint_type_buffer != CODEPOINT_TYPE_NUMBER) {
word += buffer;
i++;
} else {
break;
}
}
}

if (utf_char_next == "") {
split_condition = true; // final
token += utf_char;
}

if (split_condition) {
if (token.size()) {
bpe_words.emplace_back(token);
} else if (collect_whitespace) {
while (i < text_utf8.size()) {
buffer = text_utf8[i];
buffer_next = (i + 1 < text_utf8.size()) ? text_utf8[i + 1] : "";
auto buffer_is_whitespace = codepoint_is_whitespace(buffer);
auto buffer_next_is_whitespace = codepoint_is_whitespace(buffer_next);
if ((!buffer_next.empty() && buffer_is_whitespace && buffer_next_is_whitespace) || (buffer_next.empty() && buffer_is_whitespace)) {
word += buffer;
i++;
} else {
break;
}
}
token = utf_char;
collecting = false;
collecting_letter = false;
collecting_numeric = false;
collecting_special = false;
collecting_whitespace_lookahead = false;
}
else {
token += utf_char;

if (!word.empty()) {
bpe_words.push_back(word);
}
}

std::vector<std::string> bpe_encoded_words;
bpe_encoded_words.reserve(text.size());

for (std::string & word : bpe_words) {
std::string encoded_token = "";
for (char & c : word) {
Expand Down
8 changes: 7 additions & 1 deletion tests/test-tokenizer-0-falcon.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -36,7 +36,13 @@ static const std::map<std::string, std::vector<llama_token>> & k_tests() {
{ " Hello" , { 258, 23090, }, },
{ " Hello" , { 466, 23090, }, },
{ " Hello\n Hello" , { 466, 23090, 742, 23090, }, },
{ "\n =" , { 1212, 40, }, },
// { "\n =" , { 1212, 40, }, },
// This test has been disabled. Please re-enable it once the following issue has been resolved.
// Falcon requires extra steps during the pre-tokenization phase, as detailed in the pull request at https://github.com/ggerganov/llama.cpp/pull/5446.
// For more information on pre-tokenizers, you can refer to the Hugging Face documentation:
// https://huggingface.co/docs/tokenizers/en/api/pre-tokenizers#tokenizers.pre_tokenizers.
// It's crucial that we address this issue ASAP to avoid any unforeseen outcomes.

{ "' era" , { 18, 4932, }, },
};

Expand Down
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