128 lines
3.2 KiB
C++
128 lines
3.2 KiB
C++
//
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// Created by gabi on 6/15/18.
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//
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#pragma once
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#include "chrono"
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#include "spdlog/fmt/fmt.h"
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// Some fmt helpers to efficiently format and pad ints and strings
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namespace spdlog {
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namespace details {
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namespace fmt_helper {
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template<size_t Buffer_Size>
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inline void append_str(const std::string &str, fmt::basic_memory_buffer<char, Buffer_Size> &dest)
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{
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auto *str_ptr = str.data();
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dest.append(str_ptr, str_ptr + str.size());
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}
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template<size_t Buffer_Size>
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inline void append_c_str(const char *c_str, fmt::basic_memory_buffer<char, Buffer_Size> &dest)
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{
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auto len = std::char_traits<char>::length(c_str);
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dest.append(c_str, c_str + len);
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}
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template<size_t Buffer_Size1, size_t Buffer_Size2>
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inline void append_buf(const fmt::basic_memory_buffer<char, Buffer_Size1> &buf, fmt::basic_memory_buffer<char, Buffer_Size2> &dest)
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{
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auto *buf_ptr = buf.data();
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dest.append(buf_ptr, buf_ptr + buf.size());
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}
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template<typename T, size_t Buffer_Size>
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inline void append_int(T n, fmt::basic_memory_buffer<char, Buffer_Size> &dest)
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{
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fmt::format_int i(n);
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dest.append(i.data(), i.data() + i.size());
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}
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template<size_t Buffer_Size>
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inline void pad2(int n, fmt::basic_memory_buffer<char, Buffer_Size> &dest)
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{
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if (n > 99)
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{
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append_int(n, dest);
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return;
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}
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if (n > 9) // 10-99
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{
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dest.push_back(static_cast<char>('0' + n / 10));
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dest.push_back(static_cast<char>('0' + n % 10));
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return;
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}
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if (n >= 0) // 0-9
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{
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dest.push_back('0');
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dest.push_back(static_cast<char>('0' + n));
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return;
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}
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// negatives (unlikely, but just in case, let fmt deal with it)
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fmt::format_to(dest, "{:02}", n);
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}
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template<size_t Buffer_Size>
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inline void pad3(int n, fmt::basic_memory_buffer<char, Buffer_Size> &dest)
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{
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if (n > 999)
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{
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append_int(n, dest);
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return;
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}
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if (n > 99) // 100-999
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{
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append_int(n / 100, dest);
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pad2(n % 100, dest);
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return;
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}
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if (n > 9) // 10-99
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{
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dest.push_back('0');
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dest.push_back(static_cast<char>('0' + n / 10));
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dest.push_back(static_cast<char>('0' + n % 10));
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return;
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}
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if (n >= 0)
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{
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dest.push_back('0');
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dest.push_back('0');
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dest.push_back(static_cast<char>('0' + n));
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return;
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}
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// negatives (unlikely, but just in case let fmt deal with it)
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fmt::format_to(dest, "{:03}", n);
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}
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template<size_t Buffer_Size>
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inline void pad6(size_t n, fmt::basic_memory_buffer<char, Buffer_Size> &dest)
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{
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if (n > 99999)
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{
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append_int(n, dest);
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return;
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}
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pad3(static_cast<int>(n / 1000), dest);
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pad3(static_cast<int>(n % 1000), dest);
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}
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// return fraction of a second of the given time_point.
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// e.g.
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// fraction<std::milliseconds>(tp) -> will return the millis part of the second
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template<typename ToDuration>
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inline ToDuration time_fraction(const log_clock::time_point &tp)
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{
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using std::chrono::duration_cast;
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using std::chrono::seconds;
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auto duration = tp.time_since_epoch();
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auto secs = duration_cast<seconds>(duration);
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return duration_cast<ToDuration>(duration) - duration_cast<ToDuration>(secs);
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}
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} // namespace fmt_helper
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} // namespace details
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} // namespace spdlog
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