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annotate src/core/time.cc @ 305:91ac90a34003

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core/time: remove Duration class, use regular functions instead this class was pretty useless anyway
author Paper <paper@paper.us.eu.org>
date Sun, 19 May 2024 15:56:20 -0400
parents 7cf53145de11
children f4538a4c91ba
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5c0397762b53 INCOMPLETE: megacommit :)
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1 #include "core/time.h"
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2 #include "core/strings.h"
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3
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4 #include <cassert>
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5 #include <cmath>
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6 #include <cstdint>
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7 #include <ctime>
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8 #include <string>
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10 namespace Time {
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11
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12 static int64_t GetSecondsInMinutes(Timestamp length) {
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13 return std::llround(static_cast<double>(length) / 60.0);
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14 }
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16 static int64_t GetSecondsInHours(Timestamp length) {
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17 return std::llround(static_cast<double>(length) / 3600.0);
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18 }
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19
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20 static int64_t GetSecondsInDays(Timestamp length) {
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21 return std::llround(static_cast<double>(length) / 86400.0);
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22 }
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23
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24 std::string GetSecondsAsRelativeString(Timestamp length) {
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25 std::string result;
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27 auto get = [](int64_t val, const std::string& s, const std::string& p) {
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28 return Strings::ToUtf8String(val) + " " + (val == 1 ? s : p);
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29 };
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31 if (length < 60)
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32 result = get(length, "second", "seconds");
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33 else if (GetSecondsInMinutes(length) < 60)
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34 result = get(GetSecondsInMinutes(length), "minute", "minutes");
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35 else if (GetSecondsInHours(length) < 24)
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36 result = get(GetSecondsInHours(length), "hour", "hours");
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37 else if (GetSecondsInDays(length) < 28)
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38 result = get(GetSecondsInDays(length), "day", "days");
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39 else if (GetSecondsInDays(length) < 365)
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40 result = get(GetSecondsInDays(length) / 30, "month", "months");
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41 else
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42 result = get(GetSecondsInDays(length) / 365, "year", "years");
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44 if (length < 0)
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45 result = "In " + result;
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46 else
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47 result += " ago";
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48
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49 return result;
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50 }
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51
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52 std::string GetSecondsAsAbsoluteString(Units unit_cutoff, Timestamp amount, double unit_in_seconds) {
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53 /* avoid calculating this twice */
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54 const double years_conv = (31556952.0 / unit_in_seconds);
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55 const double months_conv = (2629746.0 / unit_in_seconds);
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56 const double days_conv = (86400.0 / unit_in_seconds);
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57 const double hours_conv = (3600.0 / unit_in_seconds);
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58 const double minutes_conv = (60.0 / unit_in_seconds);
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59 const double seconds_conv = (1.0 / unit_in_seconds);
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61 const int years = amount / years_conv;
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62 const int months = std::fmod(amount, years_conv) / months_conv;
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63 const int days = std::fmod(amount, months_conv) / days_conv;
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64 const int hours = std::fmod(amount, days_conv) / hours_conv;
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65 const int minutes = std::fmod(amount, hours_conv) / minutes_conv;
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66 const int seconds = std::fmod(amount, minutes_conv) / seconds_conv;
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67
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68 const auto add_time_segment = [](std::ostringstream& str, int64_t amount, const std::string_view& singular,
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69 const std::string_view& plural, bool always = false) {
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70 if (amount > 0 || always)
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71 str << amount << ((amount == 1) ? singular : plural);
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72 };
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74 /* for now, this function is very en_US specific */
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76 std::ostringstream string;
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77 add_time_segment(string, years, " year ", " years ");
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78 add_time_segment(string, months, " month ", " months ");
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79 add_time_segment(string, days, " day ", " days ");
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80 add_time_segment(string, hours, " hour ", " hours ");
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81
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82 if (unit_cutoff == Units::Minutes) {
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83 add_time_segment(string, minutes, " minute", " minutes", true);
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84 return string.str();
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85 } else {
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86 add_time_segment(string, minutes, " minute ", " minutes ");
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87 }
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89 add_time_segment(string, seconds, " second", " seconds", true);
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90 return string.str();
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91 }
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92
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93 int64_t GetSystemTime() {
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94 static_assert(sizeof(int64_t) >= sizeof(time_t));
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95 time_t t = std::time(nullptr);
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96 return reinterpret_cast<int64_t>(t);
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97 }
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98
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99 } // namespace Time