45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
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/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2016,2017,2018 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 <libmes.h>
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long
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abtol (char const **p, int base)
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{
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char const *s = *p;
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long i = 0;
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int sign = 1;
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if (!base) base = 10;
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if (*s && *s == '-')
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{
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sign = -1;
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s++;
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}
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while (isnumber (*s, base))
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{
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i *= base;
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long m = *s > '9' ? 'a' - 10 : '0';
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i += *s - m;
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s++;
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}
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*p = s;
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return i * sign;
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}
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