52 lines
2.6 KiB
C
52 lines
2.6 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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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/alg/reverse.h"
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#include "libc/conv/conv.h"
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#include "libc/conv/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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