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Serenity Operating System
1/*
2 * Copyright (c) 2020-2022, the SerenityOS developers.
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <AK/Assertions.h>
8#include <AK/DeprecatedString.h>
9#include <AK/NumberFormat.h>
10#include <AK/NumericLimits.h>
11#include <AK/StringView.h>
12
13namespace AK {
14
15// FIXME: Remove this hackery once printf() supports floats.
16static DeprecatedString number_string_with_one_decimal(u64 number, u64 unit, StringView suffix)
17{
18 constexpr auto max_unit_size = NumericLimits<u64>::max() / 10;
19 VERIFY(unit < max_unit_size);
20
21 auto integer_part = number / unit;
22 auto decimal_part = (number % unit) * 10 / unit;
23 return DeprecatedString::formatted("{}.{} {}", integer_part, decimal_part, suffix);
24}
25
26DeprecatedString human_readable_quantity(u64 quantity, HumanReadableBasedOn based_on, StringView unit)
27{
28 u64 size_of_unit = based_on == HumanReadableBasedOn::Base2 ? 1024 : 1000;
29 constexpr auto unit_prefixes = AK::Array { "", "K", "M", "G", "T", "P", "E" };
30 auto full_unit_suffix = [&](int index) {
31 auto binary_infix = (based_on == HumanReadableBasedOn::Base2 && index != 0) ? "i"sv : ""sv;
32 return DeprecatedString::formatted("{}{}{}",
33 unit_prefixes[index], binary_infix, unit);
34 };
35
36 auto size_of_current_unit = size_of_unit;
37
38 if (quantity < size_of_unit)
39 return DeprecatedString::formatted("{} {}", quantity, full_unit_suffix(0));
40
41 for (size_t i = 1; i < unit_prefixes.size() - 1; i++) {
42 auto suffix = full_unit_suffix(i);
43 if (quantity < size_of_unit * size_of_current_unit) {
44 return number_string_with_one_decimal(quantity, size_of_current_unit, suffix);
45 }
46
47 size_of_current_unit *= size_of_unit;
48 }
49
50 return number_string_with_one_decimal(quantity,
51 size_of_current_unit, full_unit_suffix(unit_prefixes.size() - 1));
52}
53
54DeprecatedString human_readable_size(u64 size, HumanReadableBasedOn based_on)
55{
56 return human_readable_quantity(size, based_on, "B"sv);
57}
58
59DeprecatedString human_readable_size_long(u64 size)
60{
61 if (size < 1 * KiB)
62 return DeprecatedString::formatted("{} bytes", size);
63 else
64 return DeprecatedString::formatted("{} ({} bytes)", human_readable_size(size), size);
65}
66
67DeprecatedString human_readable_time(i64 time_in_seconds)
68{
69 auto days = time_in_seconds / 86400;
70 time_in_seconds = time_in_seconds % 86400;
71
72 auto hours = time_in_seconds / 3600;
73 time_in_seconds = time_in_seconds % 3600;
74
75 auto minutes = time_in_seconds / 60;
76 time_in_seconds = time_in_seconds % 60;
77
78 StringBuilder builder;
79
80 if (days > 0)
81 builder.appendff("{} day{} ", days, days == 1 ? "" : "s");
82
83 if (hours > 0)
84 builder.appendff("{} hour{} ", hours, hours == 1 ? "" : "s");
85
86 if (minutes > 0)
87 builder.appendff("{} minute{} ", minutes, minutes == 1 ? "" : "s");
88
89 builder.appendff("{} second{}", time_in_seconds, time_in_seconds == 1 ? "" : "s");
90
91 return builder.to_deprecated_string();
92}
93
94DeprecatedString human_readable_digital_time(i64 time_in_seconds)
95{
96 auto hours = time_in_seconds / 3600;
97 time_in_seconds = time_in_seconds % 3600;
98
99 auto minutes = time_in_seconds / 60;
100 time_in_seconds = time_in_seconds % 60;
101
102 StringBuilder builder;
103
104 if (hours > 0)
105 builder.appendff("{:02}:", hours);
106 builder.appendff("{:02}:", minutes);
107 builder.appendff("{:02}", time_in_seconds);
108
109 return builder.to_deprecated_string();
110}
111
112}