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https://github.com/jart/cosmopolitan.git
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54 lines
2.5 KiB
C
54 lines
2.5 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2022 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/fmt/itoa.h"
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#include "libc/macros.h"
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/**
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* Represents size as readable string.
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*
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* @param p is output buffer
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* @param b should be 1024 or 1000
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* @return pointer to nul byte
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*/
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char *sizefmt(char *p, uint64_t x, uint64_t b) {
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int i, suffix;
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struct {
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char suffix;
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uint64_t size;
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} kUnits[] = {
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{'e', b * b * b * b * b * b},
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{'p', b * b * b * b * b},
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{'t', b * b * b * b},
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{'g', b * b * b},
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{'m', b * b},
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{'k', b},
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};
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for (suffix = i = 0; i < ARRAYLEN(kUnits); ++i) {
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if (x >= kUnits[i].size * 9) {
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x = (x + kUnits[i].size / 2) / kUnits[i].size;
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suffix = kUnits[i].suffix;
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break;
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}
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}
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p = FormatUint64(p, x);
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if (suffix)
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*p++ = suffix;
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*p = 0;
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return p;
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}
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