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https://github.com/SerenityOS/serenity
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0944f56181
In particular: consistent rounding and extreme values. Before, rounding was something like 'away from 0.999...', which led to surprising corner cases in which the value was rounded up. Now, rounding is always 'down'. This even works for 0xffffffff, and also for 0xffffffffffffffffULL on 64-bit.
55 lines
2.1 KiB
C++
55 lines
2.1 KiB
C++
/*
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* Copyright (c) 2020, The SerenityOS developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/Forward.h>
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#include <AK/String.h>
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namespace AK {
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// FIXME: Remove this hackery once printf() supports floats.
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static String number_string_with_one_decimal(u64 number, u32 unit, const char* suffix)
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{
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int decimal = (number % unit) * 10 / unit;
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return String::format("%llu.%d %s", number / unit, decimal, suffix);
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}
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static inline String human_readable_size(size_t size)
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{
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if (size < 1 * KiB)
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return String::format("%zu B", size);
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if (size < 1 * MiB)
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return number_string_with_one_decimal(size, KiB, "KiB");
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if (size < 1 * GiB)
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return number_string_with_one_decimal(size, MiB, "MiB");
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return number_string_with_one_decimal(size, GiB, "GiB");
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}
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}
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using AK::human_readable_size;
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