51 lines
2.5 KiB
C
51 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 net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 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/alg/reverse.h"
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#include "libc/fmt/conv.h"
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#include "libc/fmt/itoa.h"
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#include "libc/limits.h"
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/**
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* Converts unsigned 64-bit integer to string.
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* @param a needs at least 21 bytes
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* @return bytes written w/o nul
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*/
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noinline size_t uint64toarray_radix10(uint64_t i, char *a) {
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size_t j;
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j = 0;
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do {
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a[j++] = i % 10 + '0';
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i /= 10;
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} while (i > 0);
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a[j] = '\0';
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reverse(a, j);
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return j;
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}
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/**
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* Converts signed 64-bit integer to string.
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* @param a needs at least 21 bytes
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* @return bytes written w/o nul
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*/
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size_t int64toarray_radix10(int64_t i, char *a) {
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if (i >= 0) return uint64toarray_radix10(i, a);
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*a++ = '-';
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return 1 + uint64toarray_radix10(-i, a);
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}
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