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ccb6b4f943
A possible integer overflow might have occured inside the function in case (number % unit) * 10 did not fit into a u64. So it is verified that this does not happen at the beginning of the function.
112 lines
3.3 KiB
C++
112 lines
3.3 KiB
C++
/*
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* Copyright (c) 2020-2022, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Assertions.h>
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#include <AK/DeprecatedString.h>
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#include <AK/NumberFormat.h>
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#include <AK/NumericLimits.h>
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#include <AK/StringView.h>
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namespace AK {
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// FIXME: Remove this hackery once printf() supports floats.
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static DeprecatedString number_string_with_one_decimal(u64 number, u64 unit, StringView suffix)
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{
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constexpr auto max_unit_size = NumericLimits<u64>::max() / 10;
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VERIFY(unit < max_unit_size);
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auto integer_part = number / unit;
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auto decimal_part = (number % unit) * 10 / unit;
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return DeprecatedString::formatted("{}.{} {}", integer_part, decimal_part, suffix);
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}
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DeprecatedString human_readable_quantity(u64 quantity, StringView unit)
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{
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constexpr u64 size_of_unit = 1024;
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constexpr auto unit_prefixes = AK::Array { "", "K", "M", "G", "T", "P", "E" };
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auto full_unit_suffix = [&](int index) {
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auto binary_infix = (size_of_unit == 1024 && index != 0) ? "i"sv : ""sv;
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return DeprecatedString::formatted("{}{}{}",
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unit_prefixes[index], binary_infix, unit);
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};
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auto size_of_current_unit = size_of_unit;
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if (quantity < size_of_unit)
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return DeprecatedString::formatted("{} {}", quantity, full_unit_suffix(0));
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for (size_t i = 1; i < unit_prefixes.size() - 1; i++) {
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auto suffix = full_unit_suffix(i);
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if (quantity < size_of_unit * size_of_current_unit) {
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return number_string_with_one_decimal(quantity, size_of_current_unit, suffix);
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}
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size_of_current_unit *= size_of_unit;
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}
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return number_string_with_one_decimal(quantity,
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size_of_current_unit, full_unit_suffix(unit_prefixes.size() - 1));
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}
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DeprecatedString human_readable_size(u64 size)
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{
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return human_readable_quantity(size, "B"sv);
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}
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DeprecatedString human_readable_size_long(u64 size)
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{
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if (size < 1 * KiB)
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return DeprecatedString::formatted("{} bytes", size);
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else
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return DeprecatedString::formatted("{} ({} bytes)", human_readable_size(size), size);
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}
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DeprecatedString human_readable_time(i64 time_in_seconds)
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{
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auto days = time_in_seconds / 86400;
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time_in_seconds = time_in_seconds % 86400;
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auto hours = time_in_seconds / 3600;
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time_in_seconds = time_in_seconds % 3600;
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auto minutes = time_in_seconds / 60;
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time_in_seconds = time_in_seconds % 60;
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StringBuilder builder;
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if (days > 0)
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builder.appendff("{} day{} ", days, days == 1 ? "" : "s");
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if (hours > 0)
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builder.appendff("{} hour{} ", hours, hours == 1 ? "" : "s");
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if (minutes > 0)
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builder.appendff("{} minute{} ", minutes, minutes == 1 ? "" : "s");
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builder.appendff("{} second{}", time_in_seconds, time_in_seconds == 1 ? "" : "s");
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return builder.to_deprecated_string();
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}
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DeprecatedString human_readable_digital_time(i64 time_in_seconds)
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{
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auto hours = time_in_seconds / 3600;
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time_in_seconds = time_in_seconds % 3600;
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auto minutes = time_in_seconds / 60;
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time_in_seconds = time_in_seconds % 60;
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StringBuilder builder;
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if (hours > 0)
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builder.appendff("{:02}:", hours);
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builder.appendff("{:02}:", minutes);
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builder.appendff("{:02}", time_in_seconds);
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return builder.to_deprecated_string();
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}
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}
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