70 lines
1.5 KiB
C
70 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 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 <mes/lib.h>
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#include <assert.h>
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#include <string.h>
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char *__itoa_buf;
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char *
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ntoab (long x, int base, int signed_p)
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{
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if (__itoa_buf == 0)
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__itoa_buf = malloc (20);
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char *buf = __itoa_buf;
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char *p = buf + 11;
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p[0] = 0;
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p = p - 1;
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assert_msg (base > 0, "base > 0");
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int sign_p = 0;
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unsigned u;
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if (signed_p != 0 && x < 0)
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{
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sign_p = 1;
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u = -x;
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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 i;
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i = u % base;
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u = u / base;
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if (i > 9)
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p[0] = 'a' + i - 10;
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else
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p[0] = '0' + i;
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p = p - 1;
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}
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while (u != 0);
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if (sign_p && p[1] != '0')
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{
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p[0] = '-';
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p = p - 1;
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}
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return p + 1;
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}
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