142 lines
4.5 KiB
C++
142 lines
4.5 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_LOGGING_H
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#define BLT_LOGGING_LOGGING_H
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#include <sstream>
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#include <string>
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#include <vector>
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#include <blt/meta/meta.h>
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#include <blt/logging/fmt_tokenizer.h>
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namespace blt::logging
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{
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struct logger_t
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{
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explicit logger_t() = default;
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template <typename... Args>
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std::string log(std::string fmt, Args&&... args)
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{
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compile(std::move(fmt));
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auto sequence = std::make_integer_sequence<size_t, sizeof...(Args)>{};
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while (auto pair = consume_until_fmt())
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{
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auto [begin, end] = *pair;
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if (end - begin > 0)
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{
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auto format_data = handle_fmt(m_fmt.substr(begin + 1, begin - end - 1));
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auto [arg_pos, fmt_type] = format_data;
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if (arg_pos == -1)
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arg_pos = static_cast<i64>(m_arg_pos++);
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if (fmt_type)
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{
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if (fmt_type == fmt_type_t::GENERAL)
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{
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apply_func([this](auto&& value)
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{
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if (static_cast<u64>(value) > 0xFFFFFFFFFul)
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exponential();
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else
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fixed();
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m_stream << std::forward<decltype(value)>(value);
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}, arg_pos, sequence, std::forward<Args>(args)...);
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} else if (fmt_type == fmt_type_t::CHAR)
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{
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} else if (fmt_type == fmt_type_t::BINARY)
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{
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}
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}
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else
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{
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apply_func([this](auto&& value)
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{
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m_stream << std::forward<decltype(value)>(value);
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}, arg_pos, sequence, std::forward<Args>(args)...);
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}
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}
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else
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apply_func([this](auto&& value)
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{
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m_stream << std::forward<decltype(value)>(value);
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}, m_arg_pos++, sequence, std::forward<Args>(args)...);
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}
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finish();
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return to_string();
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}
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std::string to_string();
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private:
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template <typename Func, typename... Args, size_t... Indexes>
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void apply_func(const Func& func, const size_t arg, std::integer_sequence<size_t, Indexes...>, Args&&... args)
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{
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((handle_func<Indexes>(func, arg, std::forward<Args>(args))), ...);
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}
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template <size_t index, typename Func, typename T>
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void handle_func(const Func& func, const size_t arg, T&& t)
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{
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if (index == arg)
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func(std::forward<T>(t));
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}
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[[nodiscard]] std::pair<i64, std::optional<fmt_type_t>> handle_fmt(std::string_view fmt);
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void exponential();
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void fixed();
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void compile(std::string fmt);
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std::optional<std::pair<size_t, size_t>> consume_until_fmt();
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void finish();
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std::string m_fmt;
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std::stringstream m_stream;
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fmt_parser_t m_parser;
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size_t m_last_fmt_pos = 0;
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size_t m_arg_pos = 0;
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};
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void print(const std::string& fmt);
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void newline();
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logger_t& get_global_logger();
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template <typename... Args>
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void print(std::string fmt, Args&&... args)
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{
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auto& logger = get_global_logger();
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print(logger.log(std::move(fmt), std::forward<Args>(args)...));
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}
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template <typename... Args>
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void println(std::string fmt, Args&&... args)
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{
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print(std::move(fmt), std::forward<Args>(args)...);
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newline();
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}
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}
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#endif // BLT_LOGGING_LOGGING_H
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