diff --git a/common/json-schema-to-grammar.cpp b/common/json-schema-to-grammar.cpp index 0e468034642f7..fab3717a9126e 100644 --- a/common/json-schema-to-grammar.cpp +++ b/common/json-schema-to-grammar.cpp @@ -11,35 +11,100 @@ using json = nlohmann::ordered_json; +template +static std::string join(Iterator begin, Iterator end, const std::string & separator); + +static std::string repeat(const std::string & str, size_t n); + +static std::string build_repetition(const std::string & item_rule, int min_items, int max_items, const std::string & separator_rule = "", bool item_rule_is_literal = false) { + if (separator_rule.empty()) { + if (min_items == 0 && max_items == 1) { + return item_rule + "?"; + } else if (min_items == 1 && max_items == std::numeric_limits::max()) { + return item_rule + "+"; + } + } + + std::string result; + if (min_items > 0) { + if (item_rule_is_literal && separator_rule.empty()) { + result = "\"" + repeat(std::string(item_rule.begin() + 1, item_rule.end() - 1), min_items) + "\""; + } else { + std::vector items(min_items, item_rule); + result = join(items.begin(), items.end(), separator_rule.empty() ? " " : " " + separator_rule + " "); + } + } + + std::function opt_repetitions = [&](int up_to_n, bool prefix_with_sep) -> std::string { + if (up_to_n == 0) { + return ""; + } + + std::string res; + if (!separator_rule.empty() && prefix_with_sep) { + res = separator_rule + " " + item_rule; + } else { + res = item_rule; + } + if (up_to_n > 1) { + res += " " + opt_repetitions(up_to_n - 1, true); + } + return "(" + res + ")?"; + }; + + if (min_items > 0 && max_items != min_items) { + result += " "; + } + + if (max_items != std::numeric_limits::max()) { + result += opt_repetitions(max_items - min_items, min_items > 0); + } else { + std::string item_operator = "(" + (separator_rule.empty() ? "" : separator_rule + " ") + item_rule + ")"; + if (min_items == 0 && !separator_rule.empty()) { + result = "(" + item_rule + " " + item_operator + "*)?"; + } else { + result += item_operator + "*"; + } + } + + return result; +} + const std::string SPACE_RULE = "\" \"?"; -std::unordered_map PRIMITIVE_RULES = { - {"boolean", "(\"true\" | \"false\") space"}, - {"number", "(\"-\"? ([0-9] | [1-9] [0-9]*)) (\".\" [0-9]+)? ([eE] [-+]? [0-9]+)? space"}, - {"integer", "(\"-\"? ([0-9] | [1-9] [0-9]*)) space"}, - {"value", "object | array | string | number | boolean"}, - {"object", "\"{\" space ( string \":\" space value (\",\" space string \":\" space value)* )? \"}\" space"}, - {"array", "\"[\" space ( value (\",\" space value)* )? \"]\" space"}, - {"uuid", "\"\\\"\" [0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F] " +struct BuiltinRule { + std::string content; + std::vector deps; +}; + +const std::string _up_to_15_digits = build_repetition("[0-9]", 0, 15); + +std::unordered_map PRIMITIVE_RULES = { + {"boolean", {"(\"true\" | \"false\") space", {}}}, + {"decimal-part", {"[0-9] " + _up_to_15_digits, {}}}, + {"integral-part", {"[0-9] | [1-9] " + _up_to_15_digits, {}}}, + {"number", {"(\"-\"? integral-part) (\".\" decimal-part)? ([eE] [-+]? integral-part)? space", {"integral-part", "decimal-part"}}}, + {"integer", {"(\"-\"? integral-part) space", {"integral-part"}}}, + {"value", {"object | array | string | number | boolean | null", {"object", "array", "string", "number", "boolean", "null"}}}, + {"object", {"\"{\" space ( string \":\" space value (\",\" space string \":\" space value)* )? \"}\" space", {"string", "value"}}}, + {"array", {"\"[\" space ( value (\",\" space value)* )? \"]\" space", {"value"}}}, + {"uuid", {"\"\\\"\" [0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F] " "\"-\" [0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F] " "\"-\" [0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F] " "\"-\" [0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F] " - "\"-\" [0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F] \"\\\"\" space"}, - {"string", " \"\\\"\" (\n" - " [^\"\\\\] |\n" - " \"\\\\\" ([\"\\\\/bfnrt] | \"u\" [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F])\n" - " )* \"\\\"\" space"}, - {"null", "\"null\" space"} + "\"-\" [0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F][0-9a-fA-F] \"\\\"\" space", {}}}, + {"char", {"[^\"\\\\] | \"\\\\\" ([\"\\\\/bfnrt] | \"u\" [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F])", {}}}, + {"string", {"\"\\\"\" char* \"\\\"\" space", {"char"}}}, + {"null", {"\"null\" space", {}}}, }; -std::vector OBJECT_RULE_NAMES = {"object", "array", "string", "number", "boolean", "null", "value"}; - -std::unordered_map DATE_RULES = { - {"date", "[0-9] [0-9] [0-9] [0-9] \"-\" ( \"0\" [1-9] | \"1\" [0-2] ) \"-\" ( \"0\" [1-9] | [1-2] [0-9] | \"3\" [0-1] )"}, - {"time", "([01] [0-9] | \"2\" [0-3]) \":\" [0-5] [0-9] \":\" [0-5] [0-9] ( \".\" [0-9] [0-9] [0-9] )? ( \"Z\" | ( \"+\" | \"-\" ) ( [01] [0-9] | \"2\" [0-3] ) \":\" [0-5] [0-9] )"}, - {"date-time", "date \"T\" time"}, - {"date-string", "\"\\\"\" date \"\\\"\" space"}, - {"time-string", "\"\\\"\" time \"\\\"\" space"}, - {"date-time-string", "\"\\\"\" date-time \"\\\"\" space"} + +std::unordered_map STRING_FORMAT_RULES = { + {"date", {"[0-9] [0-9] [0-9] [0-9] \"-\" ( \"0\" [1-9] | \"1\" [0-2] ) \"-\" ( \"0\" [1-9] | [1-2] [0-9] | \"3\" [0-1] )", {}}}, + {"time", {"([01] [0-9] | \"2\" [0-3]) \":\" [0-5] [0-9] \":\" [0-5] [0-9] ( \".\" [0-9] [0-9] [0-9] )? ( \"Z\" | ( \"+\" | \"-\" ) ( [01] [0-9] | \"2\" [0-3] ) \":\" [0-5] [0-9] )", {}}}, + {"date-time", {"date \"T\" time", {"date", "time"}}}, + {"date-string", {"\"\\\"\" date \"\\\"\" space", {"date"}}}, + {"time-string", {"\"\\\"\" time \"\\\"\" space", {"time"}}}, + {"date-time-string", {"\"\\\"\" date-time \"\\\"\" space", {"date-time"}}} }; static bool is_reserved_name(const std::string & name) { @@ -47,7 +112,7 @@ static bool is_reserved_name(const std::string & name) { if (RESERVED_NAMES.empty()) { RESERVED_NAMES.insert("root"); for (const auto &p : PRIMITIVE_RULES) RESERVED_NAMES.insert(p.first); - for (const auto &p : DATE_RULES) RESERVED_NAMES.insert(p.first); + for (const auto &p : STRING_FORMAT_RULES) RESERVED_NAMES.insert(p.first); } return RESERVED_NAMES.find(name) != RESERVED_NAMES.end(); } @@ -308,47 +373,21 @@ class SchemaConverter { auto &sub = last.first; auto sub_is_literal = last.second; - if (min_times == 0 && max_times == std::numeric_limits::max()) { - sub += "*"; - } else if (min_times == 0 && max_times == 1) { - sub += "?"; - } else if (min_times == 1 && max_times == std::numeric_limits::max()) { - sub += "+"; - } else { - if (!sub_is_literal) { - std::string & sub_id = sub_rule_ids[sub]; - if (sub_id.empty()) { - sub_id = _add_rule(name + "-" + std::to_string(sub_rule_ids.size()), sub); - } - sub = sub_id; - } - std::string result; - if (sub_is_literal && min_times > 0) { - result = "\"" + repeat(sub.substr(1, sub.length() - 2), min_times) + "\""; - } else { - for (int j = 0; j < min_times; j++) { - if (j > 0) { - result += " "; - } - result += sub; - } + if (!sub_is_literal) { + std::string & sub_id = sub_rule_ids[sub]; + if (sub_id.empty()) { + sub_id = _add_rule(name + "-" + std::to_string(sub_rule_ids.size()), sub); } - if (min_times > 0 && min_times < max_times) { - result += " "; - } - if (max_times == std::numeric_limits::max()) { - result += sub + "*"; - } else { - for (int j = min_times; j < max_times; j++) { - if (j > min_times) { - result += " "; - } - result += sub + "?"; - } - } - seq.back().first = result; - seq.back().second = false; + sub = sub_id; } + seq.back().first = build_repetition( + sub_is_literal ? "\"" + sub + "\"" : sub, + min_times, + max_times, + "", + sub_is_literal + ); + seq.back().second = false; } else { std::string literal; auto is_non_literal = [&](char c) { @@ -424,7 +463,7 @@ class SchemaConverter { if (additional_properties.is_object() || (additional_properties.is_boolean() && additional_properties.get())) { std::string sub_name = name + (name.empty() ? "" : "-") + "additional"; std::string value_rule = visit(additional_properties.is_object() ? additional_properties : json::object(), sub_name + "-value"); - std::string kv_rule = _add_rule(sub_name + "-kv", _add_rule("string", PRIMITIVE_RULES.at("string")) + " \":\" space " + value_rule); + std::string kv_rule = _add_rule(sub_name + "-kv", _add_primitive("string", PRIMITIVE_RULES.at("string")) + " \":\" space " + value_rule); prop_kv_rule_names["*"] = kv_rule; optional_props.push_back("*"); } @@ -486,6 +525,25 @@ class SchemaConverter { return rule; } + std::string _add_primitive(const std::string & name, const BuiltinRule & rule) { + auto n = _add_rule(name, rule.content); + for (const auto & dep : rule.deps) { + BuiltinRule dep_rule; + auto it = PRIMITIVE_RULES.find(dep); + if (it == PRIMITIVE_RULES.end()) { + it = STRING_FORMAT_RULES.find(dep); + if (it == STRING_FORMAT_RULES.end()) { + _errors.push_back("Rule " + dep + " not known"); + continue; + } + } + if (_rules.find(dep) == _rules.end()) { + _add_primitive(dep, it->second); + } + } + return n; + } + public: SchemaConverter( const std::function & fetch_json, @@ -647,49 +705,33 @@ class SchemaConverter { return _add_rule(rule_name, rule); } else { std::string item_rule_name = visit(items, name + (name.empty() ? "" : "-") + "item"); - std::string list_item_operator = "( \",\" space " + item_rule_name + " )"; - std::string successive_items; int min_items = schema.contains("minItems") ? schema["minItems"].get() : 0; json max_items_json = schema.contains("maxItems") ? schema["maxItems"] : json(); - int max_items = max_items_json.is_number_integer() ? max_items_json.get() : -1; - if (min_items > 0) { - successive_items += repeat(list_item_operator, min_items - 1); - min_items--; - } - if (max_items >= 0 && max_items > min_items) { - successive_items += repeat(list_item_operator + "?", max_items - min_items - 1); - } else { - successive_items += list_item_operator + "*"; - } - std::string rule; - if (min_items == 0) { - rule = "\"[\" space ( " + item_rule_name + " " + successive_items + " )? \"]\" space"; - } else { - rule = "\"[\" space " + item_rule_name + " " + successive_items + " \"]\" space"; - } - return _add_rule(rule_name, rule); + int max_items = max_items_json.is_number_integer() ? max_items_json.get() : std::numeric_limits::max(); + + return _add_rule(rule_name, "\"[\" space " + build_repetition(item_rule_name, min_items, max_items, "\",\" space") + " \"]\" space"); } } else if ((schema_type.is_null() || schema_type == "string") && schema.contains("pattern")) { return _visit_pattern(schema["pattern"], rule_name); } else if ((schema_type.is_null() || schema_type == "string") && std::regex_match(schema_format, std::regex("^uuid[1-5]?$"))) { - return _add_rule(rule_name == "root" ? "root" : schema_format, PRIMITIVE_RULES.at("uuid")); - } else if ((schema_type.is_null() || schema_type == "string") && DATE_RULES.find(schema_format) != DATE_RULES.end()) { - for (const auto & kv : DATE_RULES) { - _add_rule(kv.first, kv.second); - } - return schema_format + "-string"; + return _add_primitive(rule_name == "root" ? "root" : schema_format, PRIMITIVE_RULES.at("uuid")); + } else if ((schema_type.is_null() || schema_type == "string") && STRING_FORMAT_RULES.find(schema_format + "-string") != STRING_FORMAT_RULES.end()) { + auto prim_name = schema_format + "-string"; + return _add_rule(rule_name, _add_primitive(prim_name, STRING_FORMAT_RULES.at(prim_name))); + } else if (schema_type == "string" && (schema.contains("minLength") || schema.contains("maxLength"))) { + std::string char_rule = _add_primitive("char", PRIMITIVE_RULES.at("char")); + int min_len = schema.contains("minLength") ? schema["minLength"].get() : 0; + int max_len = schema.contains("maxLength") ? schema["maxLength"].get() : std::numeric_limits::max(); + return _add_rule(rule_name, "\"\\\"\" " + build_repetition(char_rule, min_len, max_len) + " \"\\\"\" space"); } else if (schema.empty() || schema_type == "object") { - for (const auto & n : OBJECT_RULE_NAMES) { - _add_rule(n, PRIMITIVE_RULES.at(n)); - } - return _add_rule(rule_name, "object"); + return _add_rule(rule_name, _add_primitive("object", PRIMITIVE_RULES.at("object"))); } else { if (!schema_type.is_string() || PRIMITIVE_RULES.find(schema_type.get()) == PRIMITIVE_RULES.end()) { _errors.push_back("Unrecognized schema: " + schema.dump()); return ""; } // TODO: support minimum, maximum, exclusiveMinimum, exclusiveMaximum at least for zero - return _add_rule(rule_name == "root" ? "root" : schema_type.get(), PRIMITIVE_RULES.at(schema_type.get())); + return _add_primitive(rule_name == "root" ? "root" : schema_type.get(), PRIMITIVE_RULES.at(schema_type.get())); } } diff --git a/examples/json-schema-to-grammar.py b/examples/json_schema_to_grammar.py similarity index 74% rename from examples/json-schema-to-grammar.py rename to examples/json_schema_to_grammar.py index 91dd734cc26ff..1aa582824f730 100755 --- a/examples/json-schema-to-grammar.py +++ b/examples/json_schema_to_grammar.py @@ -6,37 +6,86 @@ import sys from typing import Any, Dict, List, Set, Tuple, Union +def _build_repetition(item_rule, min_items, max_items, separator_rule=None, item_rule_is_literal=False): + if not separator_rule: + if min_items == 0 and max_items == 1: + return f'{item_rule}?' + elif min_items == 1 and max_items is None: + return f'{item_rule}+' + + result = '' + + if min_items > 0: + if item_rule_is_literal and separator_rule is None: + result = '"' + (item_rule[1:-1] * min_items) + '"' + else: + result = (f' {separator_rule} ' if separator_rule else ' ').join([item_rule] * min_items) + + def opt_repetitions(up_to_n, prefix_with_sep=False): + if up_to_n == 0: + return '' + + res = separator_rule + ' ' + item_rule if separator_rule and prefix_with_sep else item_rule + if up_to_n > 1: + res += ' ' + opt_repetitions(up_to_n - 1, prefix_with_sep=True) + return f'({res})?' + + if min_items > 0 and max_items != min_items: + result += ' ' + + if max_items is not None: + result += opt_repetitions(max_items - min_items, prefix_with_sep=min_items > 0) + else: + item_operator = f'({separator_rule + " " if separator_rule else ""}{item_rule})' + + if min_items == 0 and separator_rule: + result = f'({item_rule} {item_operator}*)?' + else: + result += f'{item_operator}*' + + return result + + +class BuiltinRule: + def __init__(self, content: str, deps: list = None): + self.content = content + self.deps = deps or [] + +_up_to_15_digits = _build_repetition('[0-9]', 0, 15) + # whitespace is constrained to a single space char to prevent model "running away" in # whitespace. Also maybe improves generation quality? SPACE_RULE = '" "?' PRIMITIVE_RULES = { - 'boolean': '("true" | "false") space', - 'number': '("-"? ([0-9] | [1-9] [0-9]*)) ("." [0-9]+)? ([eE] [-+]? [0-9]+)? space', - 'integer': '("-"? ([0-9] | [1-9] [0-9]*)) space', - 'value' : 'object | array | string | number | boolean', - 'object' : '"{" space ( string ":" space value ("," space string ":" space value)* )? "}" space', - 'array' : '"[" space ( value ("," space value)* )? "]" space', - 'uuid' : '"\\"" ' + ' "-" '.join('[0-9a-fA-F]' * n for n in [8, 4, 4, 4, 12]) + ' "\\"" space', - 'string': r''' "\"" ( - [^"\\] | - "\\" (["\\/bfnrt] | "u" [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F]) - )* "\"" space''', - 'null': '"null" space', + 'boolean' : BuiltinRule('("true" | "false") space', []), + 'decimal-part' : BuiltinRule('[0-9] ' + _up_to_15_digits, []), + 'integral-part': BuiltinRule('[0-9] | [1-9] ' + _up_to_15_digits, []), + 'number' : BuiltinRule('("-"? integral-part) ("." decimal-part)? ([eE] [-+]? integral-part)? space', ['integral-part', 'decimal-part']), + 'integer' : BuiltinRule('("-"? integral-part) space', ['integral-part']), + 'value' : BuiltinRule('object | array | string | number | boolean | null', ['object', 'array', 'string', 'number', 'boolean', 'null']), + 'object' : BuiltinRule('"{" space ( string ":" space value ("," space string ":" space value)* )? "}" space', ['string', 'value']), + 'array' : BuiltinRule('"[" space ( value ("," space value)* )? "]" space', ['value']), + 'uuid' : BuiltinRule(r'"\"" ' + ' "-" '.join('[0-9a-fA-F]' * n for n in [8, 4, 4, 4, 12]) + r' "\"" space', []), + 'char' : BuiltinRule(r'[^"\\] | "\\" (["\\/bfnrt] | "u" [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F])', []), + 'string' : BuiltinRule(r'"\"" char* "\"" space', ['char']), + 'null' : BuiltinRule('"null" space', []), } -OBJECT_RULE_NAMES = ['object', 'array', 'string', 'number', 'boolean', 'null', 'value'] # TODO: support "uri", "email" string formats -DATE_RULES = { - 'date' : '[0-9] [0-9] [0-9] [0-9] "-" ( "0" [1-9] | "1" [0-2] ) "-" ( \"0\" [1-9] | [1-2] [0-9] | "3" [0-1] )', - 'time' : '([01] [0-9] | "2" [0-3]) ":" [0-5] [0-9] ":" [0-5] [0-9] ( "." [0-9] [0-9] [0-9] )? ( "Z" | ( "+" | "-" ) ( [01] [0-9] | "2" [0-3] ) ":" [0-5] [0-9] )', - 'date-time': 'date "T" time', - 'date-string': '"\\"" date "\\"" space', - 'time-string': '"\\"" time "\\"" space', - 'date-time-string': '"\\"" date-time "\\"" space', +STRING_FORMAT_RULES = { + 'date' : BuiltinRule('[0-9] [0-9] [0-9] [0-9] "-" ( "0" [1-9] | "1" [0-2] ) "-" ( \"0\" [1-9] | [1-2] [0-9] | "3" [0-1] )', []), + 'time' : BuiltinRule('([01] [0-9] | "2" [0-3]) ":" [0-5] [0-9] ":" [0-5] [0-9] ( "." [0-9] [0-9] [0-9] )? ( "Z" | ( "+" | "-" ) ( [01] [0-9] | "2" [0-3] ) ":" [0-5] [0-9] )', []), + 'date-time' : BuiltinRule('date "T" time', ['date', 'time']), + 'date-string' : BuiltinRule('"\\"" date "\\"" space', ['date']), + 'time-string' : BuiltinRule('"\\"" time "\\"" space', ['time']), + 'date-time-string': BuiltinRule('"\\"" date-time "\\"" space', ['date-time']), } -RESERVED_NAMES = set(["root", *PRIMITIVE_RULES.keys(), *DATE_RULES.keys()]) +DOTALL = '[\\U00000000-\\U0010FFFF]' +DOT = '[\\U00000000-\\x09\\x0B\\x0C\\x0E-\\U0010FFFF]' + +RESERVED_NAMES = set(["root", "dot", *PRIMITIVE_RULES.keys(), *STRING_FORMAT_RULES.keys()]) INVALID_RULE_CHARS_RE = re.compile(r'[^a-zA-Z0-9-]+') GRAMMAR_LITERAL_ESCAPE_RE = re.compile(r'[\r\n"]') @@ -46,8 +95,6 @@ NON_LITERAL_SET = set('|.()[]{}*+?') ESCAPED_IN_REGEXPS_BUT_NOT_IN_LITERALS = set('[]()|{}*+?') -DATE_PATTERN = '[0-9]{4}-(0[1-9]|1[0-2])-([0-2][0-9]|3[0-1])' -TIME_PATTERN = '([01][0-9]|2[0-3])(:[0-5][0-9]){2}(\\.[0-9]{1,3})?(Z|[+-](([01][0-9]|2[0-3]):[0-5][0-9]))' # Cap millisecond precision w/ 3 digits class SchemaConverter: def __init__(self, *, prop_order, allow_fetch, dotall, raw_pattern): @@ -55,7 +102,9 @@ def __init__(self, *, prop_order, allow_fetch, dotall, raw_pattern): self._allow_fetch = allow_fetch self._dotall = dotall self._raw_pattern = raw_pattern - self._rules = {'space': SPACE_RULE} + self._rules = { + 'space': SPACE_RULE, + } self._refs = {} self._refs_being_resolved = set() @@ -65,6 +114,29 @@ def _format_literal(self, literal): ) return f'"{escaped}"' + def not_literal(self, literal: str, dotall: bool = True, maybe_escaped_underscores = False) -> str: + ''' + not_literal('a') -> '[^a]' + not_literal('abc') -> '([^a] | "a" ([^b] | "b" ([^c])?)?)?' + ''' + assert len(literal) > 0, 'Empty literal not supported' + def recurse(i: int): + c = literal[i] + if maybe_escaped_underscores and c == '_': + yield f'[^{c}\\\\]' + yield ' | ' + yield f'"\\\\"? "{c}"' + else: + yield f'[^{c}]' + if i < len(literal) - 1: + yield ' | ' + yield self._format_literal(c) + yield ' (' + yield from recurse(i + 1) + yield ')?' + + return ''.join(('(', *recurse(0), ')')) + def _add_rule(self, name, rule): esc_name = INVALID_RULE_CHARS_RE.sub('-', name) if esc_name not in self._rules or self._rules[esc_name] == rule: @@ -169,10 +241,10 @@ def transform() -> Tuple[str, bool]: def get_dot(): if self._dotall: - rule = '[\\U00000000-\\U0010FFFF]' + rule = DOTALL else: # Accept any character... except \n and \r line break chars (\x0A and \xOD) - rule = '[\\U00000000-\\x09\\x0B\\x0C\\x0E-\\U0010FFFF]' + rule = DOT return self._add_rule(f'dot', rule) def join_seq(): @@ -246,26 +318,14 @@ def join_seq(): (sub, sub_is_literal) = seq[-1] - if min_times == 0 and max_times is None: - seq[-1] = (f'{sub}*', False) - elif min_times == 0 and max_times == 1: - seq[-1] = (f'{sub}?', False) - elif min_times == 1 and max_times is None: - seq[-1] = (f'{sub}+', False) - else: - if not sub_is_literal: - id = sub_rule_ids.get(sub) - if id is None: - id = self._add_rule(f'{name}-{len(sub_rule_ids) + 1}', sub) - sub_rule_ids[sub] = id - sub = id - - seq[-1] = ( - ' '.join( - ([f'"{sub[1:-1] * min_times}"'] if sub_is_literal else [sub] * min_times) + - ([f'{sub}?'] * (max_times - min_times) if max_times is not None else [f'{sub}*'])), - False - ) + if not sub_is_literal: + id = sub_rule_ids.get(sub) + if id is None: + id = self._add_rule(f'{name}-{len(sub_rule_ids) + 1}', sub) + sub_rule_ids[sub] = id + sub = id + + seq[-1] = (_build_repetition(f'"{sub}"' if sub_is_literal else sub, min_times, max_times, item_rule_is_literal=sub_is_literal), False) else: literal = '' while i < length: @@ -373,49 +433,47 @@ def add_component(comp_schema, is_required): ' "]" space') else: item_rule_name = self.visit(items, f'{name}{"-" if name else ""}item') - list_item_operator = f'( "," space {item_rule_name} )' - successive_items = "" min_items = schema.get("minItems", 0) max_items = schema.get("maxItems") - if min_items > 0: - successive_items = list_item_operator * (min_items - 1) - min_items -= 1 - if max_items is not None and max_items > min_items: - successive_items += (list_item_operator + "?") * (max_items - min_items - 1) - else: - successive_items += list_item_operator + "*" - if min_items == 0: - rule = f'"[" space ( {item_rule_name} {successive_items} )? "]" space' - else: - rule = f'"[" space {item_rule_name} {successive_items} "]" space' - return self._add_rule(rule_name, rule) + return self._add_rule(rule_name, '"[" space ' + _build_repetition(item_rule_name, min_items, max_items, separator_rule='"," space') + ' "]" space') elif schema_type in (None, 'string') and 'pattern' in schema: return self._visit_pattern(schema['pattern'], rule_name) elif schema_type in (None, 'string') and re.match(r'^uuid[1-5]?$', schema_format or ''): - return self._add_rule( + return self._add_primitive( 'root' if rule_name == 'root' else schema_format, PRIMITIVE_RULES['uuid'] ) - elif schema_type in (None, 'string') and schema_format in DATE_RULES: - for t, r in DATE_RULES.items(): - self._add_rule(t, r) - return schema_format + '-string' + elif schema_type in (None, 'string') and f'{schema_format}-string' in STRING_FORMAT_RULES: + prim_name = f'{schema_format}-string' + return self._add_rule(rule_name, self._add_primitive(prim_name, STRING_FORMAT_RULES[prim_name])) + + elif schema_type == 'string' and ('minLength' in schema or 'maxLength' in schema): + char_rule = self._add_primitive('char', PRIMITIVE_RULES['char']) + min_len = schema.get('minLength', 0) + max_len = schema.get('maxLength') + + return self._add_rule(rule_name, r'"\"" ' + _build_repetition(char_rule, min_len, max_len) + r' "\"" space') elif (schema_type == 'object') or (len(schema) == 0): - for n in OBJECT_RULE_NAMES: - self._add_rule(n, PRIMITIVE_RULES[n]) - return self._add_rule(rule_name, 'object') + return self._add_rule(rule_name, self._add_primitive('object', PRIMITIVE_RULES['object'])) else: assert schema_type in PRIMITIVE_RULES, f'Unrecognized schema: {schema}' # TODO: support minimum, maximum, exclusiveMinimum, exclusiveMaximum at least for zero - return self._add_rule( - 'root' if rule_name == 'root' else schema_type, - PRIMITIVE_RULES[schema_type] - ) + return self._add_primitive('root' if rule_name == 'root' else schema_type, PRIMITIVE_RULES[schema_type]) + + def _add_primitive(self, name: str, rule: BuiltinRule): + n = self._add_rule(name, rule.content) + + for dep in rule.deps: + dep_rule = PRIMITIVE_RULES.get(dep) or STRING_FORMAT_RULES.get(dep) + assert dep_rule, f'Rule {dep} not known' + if dep not in self._rules: + self._add_primitive(dep, dep_rule) + return n def _build_object_rule(self, properties: List[Tuple[str, Any]], required: Set[str], name: str, additional_properties: Union[bool, Any]): prop_order = self._prop_order @@ -437,7 +495,7 @@ def _build_object_rule(self, properties: List[Tuple[str, Any]], required: Set[st value_rule = self.visit({} if additional_properties == True else additional_properties, f'{sub_name}-value') prop_kv_rule_names["*"] = self._add_rule( f'{sub_name}-kv', - self._add_rule('string', PRIMITIVE_RULES['string']) + f' ":" space {value_rule}' + self._add_primitive('string', PRIMITIVE_RULES['string']) + f' ":" space {value_rule}' ) optional_props.append("*") diff --git a/examples/regex-to-grammar.py b/examples/regex-to-grammar.py index c98118e95a858..5cd9210a4dfc6 100644 --- a/examples/regex-to-grammar.py +++ b/examples/regex-to-grammar.py @@ -8,7 +8,7 @@ "python", os.path.join( os.path.dirname(os.path.realpath(__file__)), - "json-schema-to-grammar.py"), + "json_schema_to_grammar.py"), *rest, "-", "--raw-pattern", diff --git a/examples/server/README.md b/examples/server/README.md index a6fc92eaa9b29..918ac1295d660 100644 --- a/examples/server/README.md +++ b/examples/server/README.md @@ -11,6 +11,7 @@ Set of LLM REST APIs and a simple web front end to interact with llama.cpp. * Continuous batching * Multimodal (wip) * Monitoring endpoints + * Schema-constrained JSON response format The project is under active development, and we are [looking for feedback and contributors](https://github.com/ggerganov/llama.cpp/issues/4216). @@ -250,6 +251,8 @@ node index.js `grammar`: Set grammar for grammar-based sampling. Default: no grammar + `json_schema`: Set a JSON schema for grammar-based sampling (e.g. `{"items": {"type": "string"}, "minItems": 10, "maxItems": 100}` of a list of strings, or `{}` for any JSON). See [tests](../../tests/test-json-schema-to-grammar.cpp) for supported features. Default: no JSON schema. + `seed`: Set the random number generator (RNG) seed. Default: `-1`, which is a random seed. `ignore_eos`: Ignore end of stream token and continue generating. Default: `false` @@ -365,6 +368,8 @@ Notice that each `probs` is an array of length `n_probs`. See [OpenAI Chat Completions API documentation](https://platform.openai.com/docs/api-reference/chat). While some OpenAI-specific features such as function calling aren't supported, llama.cpp `/completion`-specific features such as `mirostat` are supported. + The `response_format` parameter supports both plain JSON output (e.g. `{"type": "json_object"}`) and schema-constrained JSON (e.g. `{"type": "json_object", "schema": {"type": "string", "minLength": 10, "maxLength": 100}}`), similar to other OpenAI-inspired API providers. + *Examples:* You can use either Python `openai` library with appropriate checkpoints: diff --git a/examples/server/json-schema-to-grammar.mjs.hpp b/examples/server/json-schema-to-grammar.mjs.hpp index ef1d5dcf3a2eb..9e2af52256a97 100644 --- a/examples/server/json-schema-to-grammar.mjs.hpp +++ b/examples/server/json-schema-to-grammar.mjs.hpp @@ -2,89 +2,267 @@ unsigned char json_schema_to_grammar_mjs[] = { 0x2f, 0x2f, 0x20, 0x57, 0x41, 0x52, 0x4e, 0x49, 0x4e, 0x47, 0x3a, 0x20, 0x54, 0x68, 0x69, 0x73, 0x20, 0x66, 0x69, 0x6c, 0x65, 0x20, 0x77, 0x61, 0x73, 0x20, 0x70, 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0x20, 0x5b, 0x6c, 0x61, 0x73, 0x74, 0x4b, + 0x65, 0x79, 0x2c, 0x20, 0x67, 0x72, 0x6f, 0x75, 0x70, 0x5d, 0x3b, 0x0a, + 0x20, 0x20, 0x7d, 0x0a, 0x7d, 0x0a }; -unsigned int json_schema_to_grammar_mjs_len = 19690; +unsigned int json_schema_to_grammar_mjs_len = 21666; diff --git a/examples/server/public/json-schema-to-grammar.mjs b/examples/server/public/json-schema-to-grammar.mjs index 17bd60fdedb8b..26f06d369c7cf 100644 --- a/examples/server/public/json-schema-to-grammar.mjs +++ b/examples/server/public/json-schema-to-grammar.mjs @@ -1,33 +1,93 @@ -// WARNING: This file was ported from json-schema-to-grammar.py, please fix bugs / add features there first. +// WARNING: This file was ported from json_schema_to_grammar.py, please fix bugs / add features there first. const SPACE_RULE = '" "?'; +function _buildRepetition(itemRule, minItems, maxItems, opts={}) { + const separatorRule = opts.separatorRule ?? ''; + const itemRuleIsLiteral = opts.itemRuleIsLiteral ?? false + + if (separatorRule === '') { + if (minItems === 0 && maxItems === 1) { + return `${itemRule}?`; + } else if (minItems === 1 && maxItems === undefined) { + return `${itemRule}+`; + } + } + + let result = ''; + if (minItems > 0) { + if (itemRuleIsLiteral && separatorRule === '') { + result = `"${itemRule.slice(1, -1).repeat(minItems)}"`; + } else { + result = Array.from({ length: minItems }, () => itemRule) + .join(separatorRule !== '' ? ` ${separatorRule} ` : ' '); + } + } + + const optRepetitions = (upToN, prefixWithSep=false) => { + if (upToN === 0) { + return ''; + } + let res = separatorRule !== '' && prefixWithSep ? separatorRule + ' ' + itemRule : itemRule; + if (upToN > 1) { + res += ' ' + optRepetitions(upToN - 1, true); + } + return `(${res})?`; + }; + + if (minItems > 0 && maxItems !== minItems) { + result += ' '; + } + + if (maxItems !== undefined) { + result += optRepetitions(maxItems - minItems, minItems > 0); + } else { + const itemOperator = `(${separatorRule !== '' ? separatorRule + ' ' : ''}${itemRule})`; + + if (minItems === 0 && separatorRule !== '') { + result = `(${itemRule} ${itemOperator}*)?`; + } else { + result += `${itemOperator}*`; + } + } + + return result; +} + +class BuiltinRule { + constructor(content, deps) { + this.content = content; + this.deps = deps || []; + } +} + +const UP_TO_15_DIGITS = _buildRepetition('[0-9]', 0, 15); + const PRIMITIVE_RULES = { - boolean: '("true" | "false") space', - number: '("-"? ([0-9] | [1-9] [0-9]*)) ("." [0-9]+)? ([eE] [-+]? [0-9]+)? space', - integer: '("-"? ([0-9] | [1-9] [0-9]*)) space', - value: 'object | array | string | number | boolean', - object: '"{" space ( string ":" space value ("," space string ":" space value)* )? "}" space', - array: '"[" space ( value ("," space value)* )? "]" space', - uuid: '"\\"" ' + [8, 4, 4, 4, 12].map(n => [...new Array(n)].map(_ => '[0-9a-fA-F]').join('')).join(' "-" ') + ' "\\"" space', - string: ` "\\"" ( - [^"\\\\] | - "\\\\" (["\\\\/bfnrt] | "u" [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F]) - )* "\\"" space`, - null: '"null" space', + boolean : new BuiltinRule('("true" | "false") space', []), + 'decimal-part' : new BuiltinRule('[0-9] ' + UP_TO_15_DIGITS, []), + 'integral-part': new BuiltinRule('[0-9] | [1-9] ' + UP_TO_15_DIGITS, []), + number : new BuiltinRule('("-"? integral-part) ("." decimal-part)? ([eE] [-+]? integral-part)? space', ['integral-part', 'decimal-part']), + integer : new BuiltinRule('("-"? integral-part) space', ['integral-part']), + value : new BuiltinRule('object | array | string | number | boolean | null', ['object', 'array', 'string', 'number', 'boolean', 'null']), + object : new BuiltinRule('"{" space ( string ":" space value ("," space string ":" space value)* )? "}" space', ['string', 'value']), + array : new BuiltinRule('"[" space ( value ("," space value)* )? "]" space', ['value']), + uuid : new BuiltinRule('"\\"" ' + [8, 4, 4, 4, 12].map(n => [...new Array(n)].map(_ => '[0-9a-fA-F]').join('')).join(' "-" ') + ' "\\"" space', []), + char : new BuiltinRule(`[^"\\\\] | "\\\\" (["\\\\/bfnrt] | "u" [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F])`, []), + string : new BuiltinRule(`"\\"" char* "\\"" space`, ['char']), + null : new BuiltinRule('"null" space', []), }; -const OBJECT_RULE_NAMES = ['object', 'array', 'string', 'number', 'boolean', 'null', 'value']; // TODO: support "uri", "email" string formats -const DATE_RULES = { - 'date' : '[0-9] [0-9] [0-9] [0-9] "-" ( "0" [1-9] | "1" [0-2] ) "-" ( \"0\" [1-9] | [1-2] [0-9] | "3" [0-1] )', - 'time' : '([01] [0-9] | "2" [0-3]) ":" [0-5] [0-9] ":" [0-5] [0-9] ( "." [0-9] [0-9] [0-9] )? ( "Z" | ( "+" | "-" ) ( [01] [0-9] | "2" [0-3] ) ":" [0-5] [0-9] )', - 'date-time': 'date "T" time', - 'date-string': '"\\"" date "\\"" space', - 'time-string': '"\\"" time "\\"" space', - 'date-time-string': '"\\"" date-time "\\"" space', -}; +const STRING_FORMAT_RULES = { + 'date' : new BuiltinRule('[0-9] [0-9] [0-9] [0-9] "-" ( "0" [1-9] | "1" [0-2] ) "-" ( \"0\" [1-9] | [1-2] [0-9] | "3" [0-1] )', []), + 'time' : new BuiltinRule('([01] [0-9] | "2" [0-3]) ":" [0-5] [0-9] ":" [0-5] [0-9] ( "." [0-9] [0-9] [0-9] )? ( "Z" | ( "+" | "-" ) ( [01] [0-9] | "2" [0-3] ) ":" [0-5] [0-9] )', []), + 'date-time' : new BuiltinRule('date "T" time', ['date', 'time']), + 'date-string' : new BuiltinRule('"\\"" date "\\"" space', ['date']), + 'time-string' : new BuiltinRule('"\\"" time "\\"" space', ['time']), + 'date-time-string': new BuiltinRule('"\\"" date-time "\\"" space', ['date-time']), +} -const RESERVED_NAMES = {'root': true, ...PRIMITIVE_RULES, ...DATE_RULES}; +const RESERVED_NAMES = {'root': true, ...PRIMITIVE_RULES, ...STRING_FORMAT_RULES}; const INVALID_RULE_CHARS_RE = /[^\dA-Za-z-]+/g; const GRAMMAR_LITERAL_ESCAPE_RE = /[\n\r"]/g; @@ -259,26 +319,19 @@ export class SchemaConverter { let [sub, subIsLiteral] = seq[seq.length - 1]; - if (minTimes === 0 && maxTimes === Infinity) { - seq[seq.length - 1] = [`${sub}*`, false]; - } else if (minTimes === 0 && maxTimes === 1) { - seq[seq.length - 1] = [`${sub}?`, false]; - } else if (minTimes === 1 && maxTimes === Infinity) { - seq[seq.length - 1] = [`${sub}+`, false]; - } else { - if (!subIsLiteral) { - let id = subRuleIds[sub]; - if (id === undefined) { - id = this._addRule(`${name}-${Object.keys(subRuleIds).length + 1}`, sub); - subRuleIds[sub] = id; - } - sub = id; + if (!subIsLiteral) { + let id = subRuleIds[sub]; + if (id === undefined) { + id = this._addRule(`${name}-${Object.keys(subRuleIds).length + 1}`, sub); + subRuleIds[sub] = id; } - - const repeatedSub = Array.from({ length: minTimes }, () => subIsLiteral ? `"${sub.slice(1, -1).repeat(minTimes)}"` : sub); - const optionalSub = maxTimes !== undefined ? Array.from({ length: maxTimes - minTimes }, () => `${sub}?`) : [`${sub}*`]; - seq[seq.length - 1] = [repeatedSub.concat(optionalSub).join(' '), false]; + sub = id; } + + seq[seq.length - 1] = [ + _buildRepetition(subIsLiteral ? `"${sub}"` : sub, minTimes, maxTimes, {itemRuleIsLiteral: subIsLiteral}), + false + ]; } else { let literal = ''; while (i < length) { @@ -394,47 +447,48 @@ export class SchemaConverter { ); } else { const itemRuleName = this.visit(items, `${name ?? ''}${name ? '-' : ''}item`); - const listItemOperator = `( "," space ${itemRuleName} )`; - let successiveItems = ''; - let minItems = schema.minItems || 0; + const minItems = schema.minItems || 0; const maxItems = schema.maxItems; - if (minItems > 0) { - successiveItems = listItemOperator.repeat(minItems - 1); - minItems--; - } - if (maxItems !== undefined && maxItems > minItems) { - successiveItems += `${listItemOperator}?`.repeat(maxItems - minItems - 1); - } else { - successiveItems += `${listItemOperator}*`; - } - const rule = minItems === 0 - ? `"[" space ( ${itemRuleName} ${successiveItems} )? "]" space` - : `"[" space ${itemRuleName} ${successiveItems} "]" space`; - return this._addRule(ruleName, rule); + return this._addRule(ruleName, '"[" space ' + _buildRepetition(itemRuleName, minItems, maxItems, {separatorRule: '"," space'}) + ' "]" space'); } } else if ((schemaType === undefined || schemaType === 'string') && 'pattern' in schema) { return this._visitPattern(schema.pattern, ruleName); } else if ((schemaType === undefined || schemaType === 'string') && /^uuid[1-5]?$/.test(schema.format || '')) { - return this._addRule( - ruleName === 'root' ? 'root' : schemaFormat, - PRIMITIVE_RULES['uuid']) - } else if ((schemaType === undefined || schemaType === 'string') && schema.format in DATE_RULES) { - for (const [t, r] of Object.entries(DATE_RULES)) { - this._addRule(t, r); - } - return schemaFormat + '-string'; + return this._addPrimitive( + ruleName === 'root' ? 'root' : schemaFormat, + PRIMITIVE_RULES['uuid'] + ); + } else if ((schemaType === undefined || schemaType === 'string') && `${schema.format}-string` in STRING_FORMAT_RULES) { + const primName = `${schema.format}-string` + return this._addRule(ruleName, this._addPrimitive(primName, STRING_FORMAT_RULES[primName])); + } else if (schemaType === 'string' && ('minLength' in schema || 'maxLength' in schema)) { + const charRuleName = this._addPrimitive('char', PRIMITIVE_RULES['char']); + const minLen = schema.minLength || 0; + const maxLen = schema.maxLength; + return this._addRule(ruleName, '"\\\"" ' + _buildRepetition(charRuleName, minLen, maxLen) + ' "\\\"" space'); } else if ((schemaType === 'object') || (Object.keys(schema).length === 0)) { - for (const n of OBJECT_RULE_NAMES) { - this._addRule(n, PRIMITIVE_RULES[n]); - } - return this._addRule(ruleName, 'object'); + return this._addRule(ruleName, this._addPrimitive('object', PRIMITIVE_RULES['object'])); } else { if (!(schemaType in PRIMITIVE_RULES)) { throw new Error(`Unrecognized schema: ${JSON.stringify(schema)}`); } // TODO: support minimum, maximum, exclusiveMinimum, exclusiveMaximum at least for zero - return this._addRule(ruleName === 'root' ? 'root' : schemaType, PRIMITIVE_RULES[schemaType]); + return this._addPrimitive(ruleName === 'root' ? 'root' : schemaType, PRIMITIVE_RULES[schemaType]); + } + } + + _addPrimitive(name, rule) { + let n = this._addRule(name, rule.content); + for (const dep of rule.deps) { + const depRule = PRIMITIVE_RULES[dep] || STRING_FORMAT_RULES[dep]; + if (!depRule) { + throw new Error(`Rule ${dep} not known`); + } + if (!(dep in this._rules)) { + this._addPrimitive(dep, depRule); + } } + return n; } _buildObjectRule(properties, required, name, additionalProperties) { @@ -462,7 +516,7 @@ export class SchemaConverter { const valueRule = this.visit(additionalProperties === true ? {} : additionalProperties, `${subName}-value`); propKvRuleNames['*'] = this._addRule( `${subName}-kv`, - `${this._addRule('string', PRIMITIVE_RULES['string'])} ":" space ${valueRule}`); + `${this._addPrimitive('string', PRIMITIVE_RULES['string'])} ":" space ${valueRule}`); optionalProps.push('*'); } diff --git a/examples/server/server.cpp b/examples/server/server.cpp index 6c64fe3e17dec..d6b0699905b98 100644 --- a/examples/server/server.cpp +++ b/examples/server/server.cpp @@ -858,7 +858,7 @@ struct server_context { slot.sparams.min_keep = json_value(data, "min_keep", default_sparams.min_keep); // process "json_schema" and "grammar" - if (data.contains("json_schema") && data.contains("grammar")) { + if (data.contains("json_schema") && !data["json_schema"].is_null() && data.contains("grammar") && !data["grammar"].is_null()) { send_error(task, "Either \"json_schema\" or \"grammar\" can be specified, but not both", ERROR_TYPE_INVALID_REQUEST); return false; } else if (data.contains("json_schema") && !data.contains("grammar")) { diff --git a/examples/ts-type-to-grammar.sh b/examples/ts-type-to-grammar.sh index a7ad001737c25..9abba2a3daa7d 100755 --- a/examples/ts-type-to-grammar.sh +++ b/examples/ts-type-to-grammar.sh @@ -1,7 +1,7 @@ #!/bin/bash # # ./examples/ts-type-to-grammar.sh "{a:string,b:string,c?:string}" -# python examples/json-schema-to-grammar.py https://json.schemastore.org/tsconfig.json +# python examples/json_schema_to_grammar.py https://json.schemastore.org/tsconfig.json # set -euo pipefail @@ -25,4 +25,4 @@ npx ts-json-schema-generator --unstable --no-top-ref --path "$DTS_FILE" --type M # https://github.com/YousefED/typescript-json-schema # npx typescript-json-schema --defaultProps --required "$DTS_FILE" MyType | tee "$SCHEMA_FILE" >&2 -./examples/json-schema-to-grammar.py "$SCHEMA_FILE" +./examples/json_schema_to_grammar.py "$SCHEMA_FILE" diff --git a/grammars/README.md b/grammars/README.md index e1383fa5c6a58..c924e8d46e5cb 100644 --- a/grammars/README.md +++ b/grammars/README.md @@ -89,3 +89,13 @@ This guide provides a brief overview. Check out the GBNF files in this directory ``` ./main -m --grammar-file grammars/some-grammar.gbnf -p 'Some prompt' ``` + +## Troubleshooting + +Grammars currently have performance gotchas (see https://github.com/ggerganov/llama.cpp/issues/4218). + +### Efficient optional repetitions + +A common pattern is to allow repetitions of a pattern `x` up to N times. + +While semantically correct, the syntax `x? x? x?.... x?` (with N repetitions) will result in extremely slow inference. Instead, you can write `(x (x (x ... (x)?...)?)?)?` (w/ N-deep nesting) diff --git a/llama.cpp b/llama.cpp index 89ea3fe1ae7fa..30ca9f532053f 100644 --- a/llama.cpp +++ b/llama.cpp @@ -2193,6 +2193,11 @@ struct llama_context { // memory buffers used to evaluate the model std::vector buf_compute_meta; ggml_backend_sched_t sched = nullptr; + + std::vector, llama_partial_utf8>> candidates_decoded; + std::vector candidates_grammar; + std::vector token_pieces; + std::vector, llama_partial_utf8>> fully_decoded_tokens; ggml_abort_callback abort_callback = nullptr; void * abort_callback_data = nullptr; @@ -11688,49 +11693,85 @@ std::pair, llama_partial_utf8> decode_utf8( } // returns true iff pos points to the end of one of the definitions of a rule -static bool llama_grammar_is_end_of_sequence(const llama_grammar_element * pos) { - switch (pos->type) { - case LLAMA_GRETYPE_END: return true; // NOLINT - case LLAMA_GRETYPE_ALT: return true; // NOLINT - default: return false; - } +static bool llama_grammar_is_end_of_sequence( + // const llama_grammar * grammar, + const std::vector & rules, + const llama_grammar_element_pos & p) { + GGML_ASSERT(p.rule_id < rules.size()); + GGML_ASSERT(p.alternative < rules[p.rule_id].size()); + const auto & seq = rules[p.rule_id][p.alternative]; + return p.position >= seq.size(); +} + +static void llama_grammar_extract_charset( + const std::vector & rules, + const llama_grammar_element_pos & p, + llama_grammar_char_ranges & cs) { + const llama_grammar_sequence & seq = rules[p.rule_id][p.alternative]; + // const llama_grammar_element & e = seq[p.position]; + + size_t position = p.position; + cs.is_positive = seq[position].type == LLAMA_GRETYPE_CHAR; + + GGML_ASSERT(cs.is_positive || seq[position].type == LLAMA_GRETYPE_CHAR_NOT); // NOLINT + + do { + if (seq[position + 1].type == LLAMA_GRETYPE_CHAR_RNG_UPPER) { + // inclusive range, e.g. [a-z] + cs.ranges.insert(std::make_pair(seq[position].value, seq[position + 1].value)); + position += 2; + } else { + // exact char match, e.g. [a] or "a" + cs.ranges.insert(std::make_pair(seq[position].value, seq[position].value)); + position += 1; + } + } while (seq[position].type == LLAMA_GRETYPE_CHAR_ALT); } // returns true iff chr satisfies the char range at pos (regular or inverse range) // asserts that pos is pointing to a char range element -static std::pair llama_grammar_match_char( - const llama_grammar_element * pos, - const uint32_t chr) { - +static std::pair llama_grammar_match_char( + const std::vector & rules, + const llama_grammar_element_pos & p, + const uint32_t chr) { + + const llama_grammar_sequence & seq = rules[p.rule_id][p.alternative]; + size_t position = p.position; + bool found = false; - bool is_positive_char = pos->type == LLAMA_GRETYPE_CHAR; + bool is_positive_char = seq[position].type == LLAMA_GRETYPE_CHAR; - GGML_ASSERT(is_positive_char || pos->type == LLAMA_GRETYPE_CHAR_NOT); // NOLINT + GGML_ASSERT(is_positive_char || seq[position].type == LLAMA_GRETYPE_CHAR_NOT); // NOLINT do { - if (pos[1].type == LLAMA_GRETYPE_CHAR_RNG_UPPER) { + if (seq[position + 1].type == LLAMA_GRETYPE_CHAR_RNG_UPPER) { // inclusive range, e.g. [a-z] - found = found || (pos->value <= chr && chr <= pos[1].value); - pos += 2; + found = found || (seq[position].value <= chr && chr <= seq[position + 1].value); + position += 2; } else { // exact char match, e.g. [a] or "a" - found = found || pos->value == chr; - pos += 1; + found = found || seq[position].value == chr; + position += 1; } - } while (pos->type == LLAMA_GRETYPE_CHAR_ALT); + } while (seq[position].type == LLAMA_GRETYPE_CHAR_ALT); - return std::make_pair(found == is_positive_char, pos); + llama_grammar_element_pos result_p = { p.rule_id, p.alternative, position }; + return std::make_pair(found == is_positive_char, result_p); } // returns true iff some continuation of the given partial UTF-8 sequence could satisfy the char // range at pos (regular or inverse range) // asserts that pos is pointing to a char range element static bool llama_grammar_match_partial_char( - const llama_grammar_element * pos, - const llama_partial_utf8 partial_utf8) { + const std::vector & rules, + const llama_grammar_element_pos & p, + const llama_partial_utf8 partial_utf8) { - bool is_positive_char = pos->type == LLAMA_GRETYPE_CHAR; - GGML_ASSERT(is_positive_char || pos->type == LLAMA_GRETYPE_CHAR_NOT); + const llama_grammar_sequence & seq = rules[p.rule_id][p.alternative]; + size_t position = p.position; + + bool is_positive_char = seq[position].type == LLAMA_GRETYPE_CHAR; + GGML_ASSERT(is_positive_char || seq[position].type == LLAMA_GRETYPE_CHAR_NOT); uint32_t partial_value = partial_utf8.value; int n_remain = partial_utf8.n_remain; @@ -11753,66 +11794,73 @@ static bool llama_grammar_match_partial_char( } do { - if (pos[1].type == LLAMA_GRETYPE_CHAR_RNG_UPPER) { + if (seq[position + 1].type == LLAMA_GRETYPE_CHAR_RNG_UPPER) { // inclusive range, e.g. [a-z] - if (pos->value <= high && low <= pos[1].value) { + if (seq[position].value <= high && low <= seq[position + 1].value) { return is_positive_char; } - pos += 2; + position += 2; } else { // exact char match, e.g. [a] or "a" - if (low <= pos->value && pos->value <= high) { + if (low <= seq[position].value && seq[position].value <= high) { return is_positive_char; } - pos += 1; + position += 1; } - } while (pos->type == LLAMA_GRETYPE_CHAR_ALT); + } while (seq[position].type == LLAMA_GRETYPE_CHAR_ALT); return !is_positive_char; } +static void print_stack(const std::vector & stack) { + for (const auto & p : stack) { + printf(" %ld, %d, %ld\n", p.rule_id, p.alternative, p.position); + } +} // transforms a grammar pushdown stack into N possible stacks, all ending // at a character range (terminal element) static void llama_grammar_advance_stack( - const std::vector> & rules, - const std::vector & stack, - std::vector> & new_stacks) { + const struct llama_grammar * grammar, + // const std::vector & rules, + const std::vector & stack, + std::vector> & new_stacks) { + + // printf("Advance: stack before:\n"); + // print_stack(stack); if (stack.empty()) { new_stacks.emplace_back(stack); return; } - const llama_grammar_element * pos = stack.back(); + const llama_grammar_element_pos & p = stack.back(); + const llama_grammar_sequence & seq = grammar->rules[p.rule_id][p.alternative]; + const llama_grammar_element * pos = &seq[p.position]; switch (pos->type) { case LLAMA_GRETYPE_RULE_REF: { - const size_t rule_id = static_cast(pos->value); - const llama_grammar_element * subpos = rules[rule_id].data(); - do { + const size_t rule_id = static_cast(pos->value); + const llama_grammar_rule & ref_rule = grammar->rules[rule_id]; + + const llama_grammar_element_pos next_in_seq { p.rule_id, p.alternative, p.position + 1 }; + const auto has_next = !llama_grammar_is_end_of_sequence(grammar->rules, next_in_seq); + + for (int i_ref_alt = 0, n_ref_alt = ref_rule.size(); i_ref_alt < n_ref_alt; ++i_ref_alt) { + const auto & referenced_alt = ref_rule[i_ref_alt]; + // init new stack without the top (pos) - std::vector new_stack(stack.begin(), stack.end() - 1); - if (!llama_grammar_is_end_of_sequence(pos + 1)) { + std::vector new_stack(stack.begin(), stack.end() - 1); + if (has_next) { // if this rule ref is followed by another element, add that to stack - new_stack.push_back(pos + 1); + new_stack.push_back(next_in_seq); } - if (!llama_grammar_is_end_of_sequence(subpos)) { + if (!referenced_alt.empty()) { // if alternate is nonempty, add to stack - new_stack.push_back(subpos); + new_stack.push_back({ rule_id, i_ref_alt, 0 }); } - llama_grammar_advance_stack(rules, new_stack, new_stacks); - while (!llama_grammar_is_end_of_sequence(subpos)) { - // scan to end of alternate def - subpos++; - } - if (subpos->type == LLAMA_GRETYPE_ALT) { - // there's another alternate def of this rule to process - subpos++; - } else { - break; - } - } while (true); + llama_grammar_advance_stack(grammar, new_stack, new_stacks); + } break; } case LLAMA_GRETYPE_CHAR: @@ -11825,51 +11873,101 @@ static void llama_grammar_advance_stack( // those GGML_ASSERT(false); } + + // for (const auto & new_stack : new_stacks) { + // printf("Advance: stack after:\n"); + // print_stack(new_stack); + // } + } +static void llama_grammar_flush_pending_alternatives_exploration( + struct llama_grammar * grammar, + const uint32_t chr) { + if (!grammar->alternatives_pending) { + return; + } + grammar->alternatives_pending = false; + + + // const auto & start_rule = vec_rules[start_rule_index]; + // for (size_t i_alt = 0, n_alt = start_rule.size(); i_alt < n_alt; ++i_alt) { + // std::vector stack; + // llama_grammar_element_pos pos { start_rule_index, i_alt, 0 }; + // if (!llama_grammar_is_end_of_sequence(vec_rules, pos)) { + // // if alternate is nonempty, add to stack + // stack.push_back(pos); + // } + // llama_grammar_advance_stack(vec_rules, stack, stacks); + // } +} + +// takes a set of possible pushdown stacks on a grammar, which are can +// be positioned at a character range or at a production / alternative choice (see `llama_grammar_advance_stack`), and +// produces the N possible stacks if the given char is accepted at those +// positions + // takes a set of possible pushdown stacks on a grammar, which are required to // be positioned at a character range (see `llama_grammar_advance_stack`), and // produces the N possible stacks if the given char is accepted at those // positions -std::vector> llama_grammar_accept( - const std::vector> & rules, - const std::vector> & stacks, - const uint32_t chr) { +static void llama_grammar_accept( + const struct llama_grammar * grammar, + // const std::vector & rules, + const std::vector> & stacks, + const uint32_t chr, + std::vector> & new_stacks) { + + // std::vector> new_stacks; + new_stacks.clear(); - std::vector> new_stacks; + // std::vector new_stack; + + // grammar->flush_pending_alternatives_exploration(chr); for (const auto & stack : stacks) { if (stack.empty()) { continue; } - auto match = llama_grammar_match_char(stack.back(), chr); + // const auto & pos = stack.back(); + // if (pos.alternative < 0) { + // // Let's choose which alternatives we go for + // } else { + + + auto match = llama_grammar_match_char(grammar->rules, stack.back(), chr); if (match.first) { - const llama_grammar_element * pos = match.second; + const llama_grammar_element_pos & pos = match.second; // update top of stack to next element, if any - std::vector new_stack(stack.begin(), stack.end() - 1); - if (!llama_grammar_is_end_of_sequence(pos)) { + // new_stack.clear(); + // new_stack.assign(stack.begin(), stack.end() - 1); + std::vector new_stack(stack.begin(), stack.end() - 1); + if (!llama_grammar_is_end_of_sequence(grammar->rules, pos)) { new_stack.push_back(pos); } - llama_grammar_advance_stack(rules, new_stack, new_stacks); + llama_grammar_advance_stack(grammar, new_stack, new_stacks); } } - return new_stacks; + // return new_stacks; } static std::vector llama_grammar_reject_candidates( - const std::vector> & rules, - const std::vector> & stacks, - const std::vector & candidates); + const struct llama_grammar * grammar, + // const std::vector & rules, + const std::vector> & stacks, + const std::vector & candidates); static std::vector llama_grammar_reject_candidates_for_stack( - const std::vector> & rules, - const std::vector & stack, + const struct llama_grammar * grammar, + // const std::vector & rules, + const std::vector & stack, const std::vector & candidates) { std::vector rejects; + rejects.reserve(candidates.size()); if (stack.empty()) { for (const auto & tok : candidates) { @@ -11880,35 +11978,37 @@ static std::vector llama_grammar_reject_candidates_for_ return rejects; } - const llama_grammar_element * stack_pos = stack.back(); + const llama_grammar_element_pos & stack_pos = stack.back(); std::vector next_candidates; + next_candidates.reserve(candidates.size()); + for (const auto & tok : candidates) { if (*tok.code_points == 0) { // reached end of full codepoints in token, reject iff it ended in a partial sequence // that cannot satisfy this position in grammar if (tok.partial_utf8.n_remain != 0 && - !llama_grammar_match_partial_char(stack_pos, tok.partial_utf8)) { + !llama_grammar_match_partial_char(grammar->rules, stack_pos, tok.partial_utf8)) { rejects.push_back(tok); } - } else if (llama_grammar_match_char(stack_pos, *tok.code_points).first) { + } else if (llama_grammar_match_char(grammar->rules, stack_pos, *tok.code_points).first) { next_candidates.push_back({ tok.index, tok.code_points + 1, tok.partial_utf8 }); } else { rejects.push_back(tok); } } - const auto * stack_pos_after = llama_grammar_match_char(stack_pos, 0).second; + const auto & stack_pos_after = llama_grammar_match_char(grammar->rules, stack_pos, 0).second; // update top of stack to next element, if any - std::vector stack_after(stack.begin(), stack.end() - 1); - if (!llama_grammar_is_end_of_sequence(stack_pos_after)) { + std::vector stack_after(stack.begin(), stack.end() - 1); + if (!llama_grammar_is_end_of_sequence(grammar->rules, stack_pos_after)) { stack_after.push_back(stack_pos_after); } - std::vector> next_stacks; - llama_grammar_advance_stack(rules, stack_after, next_stacks); + std::vector> next_stacks; + llama_grammar_advance_stack(grammar, stack_after, next_stacks); - auto next_rejects = llama_grammar_reject_candidates(rules, next_stacks, next_candidates); + auto next_rejects = llama_grammar_reject_candidates(grammar, next_stacks, next_candidates); for (const auto & tok : next_rejects) { rejects.push_back({ tok.index, tok.code_points - 1, tok.partial_utf8 }); } @@ -11917,19 +12017,20 @@ static std::vector llama_grammar_reject_candidates_for_ } static std::vector llama_grammar_reject_candidates( - const std::vector> & rules, - const std::vector> & stacks, - const std::vector & candidates) { - GGML_ASSERT(!stacks.empty()); // REVIEW + const struct llama_grammar * grammar, + // const std::vector & rules, + const std::vector> & stacks, + const std::vector & candidates) { + GGML_ASSERT(!grammar->stacks.empty()); // REVIEW if (candidates.empty()) { return std::vector(); } - auto rejects = llama_grammar_reject_candidates_for_stack(rules, stacks.front(), candidates); + auto rejects = llama_grammar_reject_candidates_for_stack(grammar, stacks.front(), candidates); for (size_t i = 1, size = stacks.size(); i < size; ++i) { - rejects = llama_grammar_reject_candidates_for_stack(rules, stacks[i], rejects); + rejects = llama_grammar_reject_candidates_for_stack(grammar, stacks[i], rejects); } return rejects; } @@ -11945,37 +12046,155 @@ struct llama_grammar * llama_grammar_init( const llama_grammar_element * pos; // copy rule definitions into vectors - std::vector> vec_rules(n_rules); - for (size_t i = 0; i < n_rules; i++) { - for (pos = rules[i]; pos->type != LLAMA_GRETYPE_END; pos++) { - vec_rules[i].push_back(*pos); + // the C version is a flat list of elements, with LLAMA_GRETYPE_ALT separating alternates and ending w/ LLAMA_GRETYPE_END + // the C++ is a vector of alternates, each alternate is a sequence (vector) of elements. + std::vector vec_rules; + vec_rules.reserve(n_rules); + for (size_t i_rule = 0; i_rule < n_rules; i_rule++) { + llama_grammar_rule rule; + llama_grammar_sequence current_seq; + for (pos = rules[i_rule]; pos->type != LLAMA_GRETYPE_END; pos++) { + if (pos->type == LLAMA_GRETYPE_ALT) { + if (pos != rules[i_rule]) { + rule.push_back(current_seq); + current_seq.clear(); + } + } else { + current_seq.push_back(*pos); + } } - vec_rules[i].push_back({LLAMA_GRETYPE_END, 0}); + if (!current_seq.empty() || (pos != rules[i_rule] && (pos - 1)->type == LLAMA_GRETYPE_ALT)) { + rule.push_back(current_seq); + current_seq.clear(); + } + vec_rules.push_back(rule); + } + + std::vector> alternative_head_sets; + std::vector> visited; + + alternative_head_sets.resize(n_rules); + visited.resize(n_rules); + for (size_t i_rule = 0; i_rule < n_rules; i_rule++) { + alternative_head_sets[i_rule].resize(vec_rules[i_rule].size()); + visited[i_rule].resize(vec_rules[i_rule].size()); } + std::function get_head_charset = [&](size_t rule_id, int alternative) { + if (rule_id >= n_rules || alternative >= vec_rules[rule_id].size()) { + throw std::runtime_error("Invalid rule_id or alternative"); + } + auto & head_charset = alternative_head_sets[rule_id][alternative]; + + if (!visited[rule_id][alternative]) { + visited[rule_id][alternative] = true; + + auto & seq = vec_rules[rule_id][alternative]; + + if (!seq.empty()) { + const auto & elem = seq[0]; + switch (elem.type) { + case LLAMA_GRETYPE_RULE_REF: { + auto & ref_rule = vec_rules[elem.value]; + for (size_t i_alt = 0, n_alt = ref_rule.size(); i_alt < n_alt; ++i_alt) { + get_head_charset(elem.value, i_alt); + const auto & cs = alternative_head_sets[elem.value][i_alt]; + head_charset += cs; + } + break; + } + case LLAMA_GRETYPE_CHAR: + case LLAMA_GRETYPE_CHAR_NOT: { + llama_grammar_extract_charset(vec_rules, { rule_id, alternative, 0 }, head_charset); + break; + } + default: + GGML_ASSERT(false); + } + } + } + // return head_charset; + }; + + for (size_t i_rule = 0; i_rule < n_rules; i_rule++) { + for (size_t i_alt = 0, n_alt = vec_rules[i_rule].size(); i_alt < n_alt; ++i_alt) { + get_head_charset(i_rule, i_alt); + } + } + + for (size_t i_rule = 0; i_rule < n_rules; i_rule++) { + llama_grammar_rule & rule = vec_rules[i_rule]; + + printf(" := ", i_rule); + for (size_t i_seq = 0, n_seq = rule.size(); i_seq < n_seq; ++i_seq) { + const auto & seq = rule[i_seq]; + if (i_seq > 0) { + printf(" | "); + } + for (size_t i_elem = 0, n_elem = seq.size(); i_elem < n_elem; ++i_elem) { + const auto & elem = seq[i_elem]; + if (i_elem > 0) { + printf(" "); + } + switch (elem.type) { + case LLAMA_GRETYPE_RULE_REF: + printf(" ", elem.value); + break; + case LLAMA_GRETYPE_CHAR: + printf("'%c' ", elem.value); + break; + case LLAMA_GRETYPE_CHAR_NOT: + printf("!'%c' ", elem.value); + break; + case LLAMA_GRETYPE_CHAR_ALT: + printf("'%c' ", elem.value); + break; + case LLAMA_GRETYPE_CHAR_RNG_UPPER: + printf("'%c' ", elem.value); + break; + default: + GGML_ASSERT(false); + } + } + } + printf("\n"); + + printf(" head sets: "); + for (size_t i_seq = 0, n_seq = rule.size(); i_seq < n_seq; ++i_seq) { + const auto & hs = alternative_head_sets[i_rule][i_seq]; + if (i_seq > 0) { + printf(" | "); + } + printf("[%s", hs.is_positive ? "" : "^"); + for (const auto & range : hs.ranges) { + if (range.first == range.second) { + printf("%c", range.first); + } else { + printf("%c-%c", range.first, range.second); + } + } + printf("]"); + } + printf("\n"); + } + + auto alternatives_pending = true; + auto * grammar = new llama_grammar{ start_rule_index, alternatives_pending, std::move(vec_rules), std::move(alternative_head_sets), {}, {} }; + // loop over alternates of start rule to build initial stacks - std::vector> stacks; - pos = vec_rules[start_rule_index].data(); - do { - std::vector stack; - if (!llama_grammar_is_end_of_sequence(pos)) { + // std::vector> stacks; + const auto & start_rule = grammar->rules[start_rule_index]; + for (int i_alt = 0, n_alt = start_rule.size(); i_alt < n_alt; ++i_alt) { + std::vector stack; + llama_grammar_element_pos pos { start_rule_index, i_alt, 0 }; + if (!llama_grammar_is_end_of_sequence(grammar->rules, pos)) { // if alternate is nonempty, add to stack stack.push_back(pos); } - llama_grammar_advance_stack(vec_rules, stack, stacks); - while (!llama_grammar_is_end_of_sequence(pos)) { - // scan to end of alternate def - pos++; - } - if (pos->type == LLAMA_GRETYPE_ALT) { - // there's another alternate def of this rule to process - pos++; - } else { - break; - } - } while (true); + llama_grammar_advance_stack(grammar, stack, grammar->stacks); + } - return new llama_grammar{ std::move(vec_rules), std::move(stacks), {} }; + return grammar; } void llama_grammar_free(struct llama_grammar * grammar) { @@ -11983,22 +12202,23 @@ void llama_grammar_free(struct llama_grammar * grammar) { } struct llama_grammar * llama_grammar_copy(const struct llama_grammar * grammar) { - llama_grammar * result = new llama_grammar{ grammar->rules, grammar->stacks, grammar->partial_utf8 }; - - // redirect elements in stacks to point to new rules - for (size_t is = 0; is < result->stacks.size(); is++) { - for (size_t ie = 0; ie < result->stacks[is].size(); ie++) { - for (size_t ir0 = 0; ir0 < grammar->rules.size(); ir0++) { - for (size_t ir1 = 0; ir1 < grammar->rules[ir0].size(); ir1++) { - if (grammar->stacks[is][ie] == &grammar->rules[ir0][ir1]) { - result->stacks[is][ie] = &result->rules[ir0][ir1]; - } - } - } - } - } + throw std::runtime_error("Not implemented: llama_grammar_copy"); + // llama_grammar * result = new llama_grammar{ grammar->rules, grammar->stacks, grammar->partial_utf8 }; + + // // redirect elements in stacks to point to new rules + // for (size_t is = 0; is < result->stacks.size(); is++) { + // for (size_t ie = 0; ie < result->stacks[is].size(); ie++) { + // for (size_t ir0 = 0; ir0 < grammar->rules.size(); ir0++) { + // for (size_t ir1 = 0; ir1 < grammar->rules[ir0].size(); ir1++) { + // if (grammar->stacks[is][ie] == &grammar->rules[ir0][ir1]) { + // result->stacks[is][ie] = &result->rules[ir0][ir1]; + // } + // } + // } + // } + // } - return result; + // return result; } // @@ -12478,14 +12698,28 @@ void llama_sample_grammar(struct llama_context * ctx, llama_token_data_array * c const llama_token eos = llama_token_eos(&ctx->model); - std::vector, llama_partial_utf8>> candidates_decoded; - candidates_decoded.reserve(candidates->size); - std::vector candidates_grammar; - candidates_grammar.reserve(candidates->size); + ctx->candidates_decoded.clear(); + ctx->candidates_decoded.reserve(candidates->size); + ctx->candidates_grammar.clear(); + ctx->candidates_grammar.reserve(candidates->size); + + if (ctx->token_pieces.empty()) { + auto n_vocab = llama_n_vocab(llama_get_model(ctx)); + ctx->token_pieces.resize(n_vocab); + ctx->fully_decoded_tokens.resize(n_vocab); + for (llama_token id = 0; id < n_vocab; ++id) { + ctx->token_pieces[id] = llama_token_to_piece(ctx, id); + ctx->fully_decoded_tokens[id] = decode_utf8(ctx->token_pieces[id], {0, 0}); + } + } + + // auto had_remaining_partial = 0; + // auto total = 0; for (size_t i = 0; i < candidates->size; ++i) { const llama_token id = candidates->data[i].id; - const std::string piece = llama_token_to_piece(ctx, id); + // const std::string piece = llama_token_to_piece(ctx, id); + const auto & piece = ctx->token_pieces[id]; if (id == eos) { if (!allow_eos) { candidates->data[i].logit = -INFINITY; @@ -12493,12 +12727,21 @@ void llama_sample_grammar(struct llama_context * ctx, llama_token_data_array * c } else if (piece.empty() || piece[0] == 0) { candidates->data[i].logit = -INFINITY; } else { - candidates_decoded.push_back(decode_utf8(piece, grammar->partial_utf8)); - candidates_grammar.push_back({ i, candidates_decoded.back().first.data(), candidates_decoded.back().second }); + // if (grammar->partial_utf8.n_remain > 0) { + // had_remaining_partial++; + // } + // total++; + if (grammar->partial_utf8.n_remain == 0) { + ctx->candidates_decoded.push_back(ctx->fully_decoded_tokens[id]); + } else { + ctx->candidates_decoded.push_back(decode_utf8(piece, grammar->partial_utf8)); + } + ctx->candidates_grammar.push_back({ i, ctx->candidates_decoded.back().first.data(), ctx->candidates_decoded.back().second }); } } + // printf("total: %d, had_remaining_partial: %d\n", total, had_remaining_partial); - const auto rejects = llama_grammar_reject_candidates(grammar->rules, grammar->stacks, candidates_grammar); + const auto rejects = llama_grammar_reject_candidates(grammar, grammar->stacks, ctx->candidates_grammar); for (const auto & reject : rejects) { candidates->data[reject.index].logit = -INFINITY; } @@ -12685,13 +12928,16 @@ void llama_grammar_accept_token(struct llama_context * ctx, struct llama_grammar GGML_ASSERT(false); } - const std::string piece = llama_token_to_piece(ctx, token); - // Note terminating 0 in decoded string - const auto decoded = decode_utf8(piece, grammar->partial_utf8); + const auto decoded = + grammar->partial_utf8.n_remain > 0 ? decode_utf8(ctx->token_pieces[token], grammar->partial_utf8) + : ctx->fully_decoded_tokens[token]; + const auto & code_points = decoded.first; + std::vector> tmp_new_stacks; for (auto it = code_points.begin(), end = code_points.end() - 1; it != end; ++it) { - grammar->stacks = llama_grammar_accept(grammar->rules, grammar->stacks, *it); + llama_grammar_accept(grammar, grammar->stacks, *it, tmp_new_stacks); + tmp_new_stacks.swap(grammar->stacks); } grammar->partial_utf8 = decoded.second; GGML_ASSERT(!grammar->stacks.empty()); diff --git a/llama.h b/llama.h index 6a5bbe26d4de7..534ee8dd3a763 100644 --- a/llama.h +++ b/llama.h @@ -1069,6 +1069,7 @@ extern "C" { #include #include +#include struct ggml_tensor; @@ -1077,9 +1078,51 @@ struct llama_partial_utf8 { int n_remain; // num bytes remaining; -1 indicates invalid sequence }; + +typedef std::vector llama_grammar_sequence; + +// Each rule can have alternative sequences +typedef std::vector llama_grammar_rule; + +struct llama_grammar_element_pos { + // Index of the rule in the grammar + size_t rule_id; + // Index of the alternative in the rule (-1 if the position is before chosing alternatives of a rule) + int alternative; + // Position in sequence + size_t position; +}; + +struct llama_grammar_char_ranges { + bool is_positive; + std::set> ranges; + + llama_grammar_char_ranges() : is_positive(true) {} + + bool empty() const { + return ranges.empty(); + } + void operator+=(const llama_grammar_char_ranges & other) { + if (!empty() && !other.empty() && is_positive != other.is_positive) { + throw std::runtime_error("Cannot combine positive and negative charsets"); + } + + for (const auto & range : other.ranges) { + ranges.insert(range); + } + } +}; + struct llama_grammar { - const std::vector> rules; - std::vector> stacks; + size_t start_rule_index; + + bool alternatives_pending; + + const std::vector rules; + + std::vector> alternative_head_sets; + + std::vector> stacks; // buffer for partially generated UTF-8 sequence from accepted tokens llama_partial_utf8 partial_utf8; diff --git a/tests/test-json-schema-to-grammar.cpp b/tests/test-json-schema-to-grammar.cpp index 4d110cf5aab86..2bd5e65c78333 100755 --- a/tests/test-json-schema-to-grammar.cpp +++ b/tests/test-json-schema-to-grammar.cpp @@ -104,16 +104,16 @@ static void test_all(const std::string & lang, std::function test-grammar-output.tmp") == 0 ? SUCCESS : FAILURE); + "python ./examples/json_schema_to_grammar.py test-json-schema-input.tmp > test-grammar-output.tmp") == 0 ? SUCCESS : FAILURE); tc.verify(read("test-grammar-output.tmp")); }); } else {