66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2016,2017,2018,2019,2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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*
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* This file is part of GNU Mes.
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*
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* GNU Mes is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* GNU Mes 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
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* GNU 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 GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <assert.h>
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#include <mes/lib.h>
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#include <stdint.h>
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#define STR(x) #x
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#define XSTR(s) STR(s)
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char *
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ntoab (long x, unsigned base, int signed_p)
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{
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static char itoa_buf[20];
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char *p = itoa_buf + 11;
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*p-- = 0;
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assert(base > 1);
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int sign_p = 0;
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unsigned long u;
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if (signed_p && x < 0)
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{
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sign_p = 1;
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/* Avoid LONG_MIN */
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u = (unsigned long) (-(x + 1));
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++u;
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}
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else
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u = x;
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do
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{
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unsigned long i;
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#if __MESC__ && __arm__
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u = __mesabi_uldiv (u, (unsigned long) base, &i);
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#else
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i = u % base;
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u = u / base;
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#endif
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*p-- = i > 9 ? 'a' + i - 10 : '0' + i;
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}
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while (u);
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if (sign_p && *(p + 1) != '0')
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*p-- = '-';
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return p + 1;
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}
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