mirror of https://github.com/dzavalishin/oskit/
58 lines
1.6 KiB
C
Executable File
58 lines
1.6 KiB
C
Executable File
/*
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* Copyright (c) 1994-1995, 1998 University of Utah and the Flux Group.
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* All rights reserved.
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*
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* This file is part of the Flux OSKit. The OSKit is free software, also known
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* as "open source;" you can redistribute it and/or modify it under the terms
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* of the GNU General Public License (GPL), version 2, as published by the Free
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* Software Foundation (FSF). To explore alternate licensing terms, contact
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* the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
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*
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* The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GPL for more details. You should have
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* received a copy of the GPL along with the OSKit; see the file COPYING. If
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* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
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*/
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#include <ctype.h>
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#include <string.h>
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unsigned long strtoul(const char *p, char **out_p, int base)
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{
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unsigned long v = 0;
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while (isspace(*p))
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p++;
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if (((base == 16) || (base == 0)) &&
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((*p == '0') && ((p[1] == 'x') || (p[1] == 'X'))))
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{
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p += 2;
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base = 16;
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}
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if (base == 0)
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{
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if (*p == '0')
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base = 8;
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else
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base = 10;
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}
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while (1)
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{
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char c = *p;
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if ((c >= '0') && (c <= '9') && (c - '0' < base))
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v = (v * base) + (c - '0');
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else if ((c >= 'a') && (c <= 'z') && (c - 'a' + 10 < base))
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v = (v * base) + (c - 'a' + 10);
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else if ((c >= 'A') && (c <= 'Z') && (c - 'A' + 10 < base))
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v = (v * base) + (c - 'A' + 10);
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else
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break;
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p++;
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}
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if (out_p) *out_p = (char*)p;
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return v;
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}
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