147 lines
3.3 KiB
C++
147 lines
3.3 KiB
C++
#pragma once
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/*
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* Copyright (C) 2024 Brett Terpstra
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef BLT_LOGGING_FMT_TOKENIZER_H
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#define BLT_LOGGING_FMT_TOKENIZER_H
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#include <optional>
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#include <string_view>
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#include <vector>
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#include <blt/std/types.h>
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namespace blt::logging
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{
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enum class fmt_token_type : u8
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{
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STRING,
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NUMBER,
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SPACE,
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COLON,
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DOT,
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MINUS,
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PLUS,
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POUND
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};
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enum class fmt_sign_t : u8
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{
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SPACE,
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PLUS,
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MINUS
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};
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enum class fmt_type_t : u8
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{
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BINARY, // 'b'
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CHAR, // 'c'
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DECIMAL, // 'd'
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OCTAL, // 'o'
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HEX, // 'x'
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HEX_FLOAT, // 'a'
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EXPONENT, // 'e'
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FIXED_POINT, // 'f'
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GENERAL // 'g'
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};
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struct fmt_spec_t
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{
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i64 arg_id = -1;
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i64 width = -1;
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i64 precision = -1;
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fmt_type_t type = fmt_type_t::DECIMAL;
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fmt_sign_t sign = fmt_sign_t::MINUS;
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bool leading_zeros = false;
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bool uppercase = false;
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bool alternate_form = false;
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};
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struct fmt_token_t
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{
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fmt_token_type type;
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std::string_view value;
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};
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class fmt_tokenizer_t
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{
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public:
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explicit fmt_tokenizer_t() = default;
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static fmt_token_type get_type(char c);
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std::optional<fmt_token_t> next();
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std::vector<fmt_token_t> tokenize(std::string_view fmt);
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private:
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size_t m_pos = 0;
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std::string_view m_fmt;
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};
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class fmt_parser_t
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{
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public:
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explicit fmt_parser_t() = default;
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fmt_token_t& peek()
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{
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return m_tokens[m_pos];
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}
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[[nodiscard]] bool has_next() const
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{
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return m_pos < m_tokens.size();
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}
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[[nodiscard]] fmt_token_t& next()
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{
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return m_tokens[m_pos++];
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}
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void consume()
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{
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++m_pos;
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}
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const fmt_spec_t& parse(std::string_view fmt);
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private:
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void parse_fmt_field();
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void parse_arg_id();
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void parse_fmt_spec();
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void parse_fmt_spec_sign();
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void parse_fmt_spec_form();
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void parse_fmt_spec_width();
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void parse_fmt_spec_precision();
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void parse_sign();
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void parse_form();
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void parse_width();
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void parse_precision();
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void parse_type();
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size_t m_pos = 0;
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std::vector<fmt_token_t> m_tokens;
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fmt_tokenizer_t m_tokenizer;
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fmt_spec_t m_spec;
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};
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}
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#endif //BLT_LOGGING_FMT_TOKENIZER_H
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