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sysadm |
1.1 |
/*
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* Copyright (C) 1999 Ross Combs (rocombs@cs.nmsu.edu)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but 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 this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "common/setup_before.h"
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#ifndef HAVE_STRTOUL
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#include "strtoul.h"
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#include "common/setup_after.h"
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extern unsigned long strtoul(char const * str, char * * endptr, int base)
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{
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unsigned int pos;
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unsigned int i;
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unsigned long val;
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if (!str)
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return 0; /* EINVAL */
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for (pos=0; str[pos]==' ' || str[pos]=='\t'; pos++);
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if (str[pos]=='-' || str[pos]=='+')
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pos++;
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if ((base==0 || base==16) && str[pos]=='0' && (str[pos+1]=='x' || str[pos+1]=='X'))
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{
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base = 16;
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pos += 2; /* skip 0x prefix */
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}
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else if ((base==0 || base==8) && str[pos]=='0')
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{
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base = 8;
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pos += 1;
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}
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else if (base==0)
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{
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base = 10;
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}
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if (base<2 || base>16) /* sorry, not complete emulation (should do up to 36) */
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return 0; /* EINVAL */
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val = 0;
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for (i=pos; str[i]!='\0'; i++)
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{
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val *= base;
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/* we could assume ASCII and subtraction but this isn't too hard */
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if (str[i]=='0')
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val += 0;
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else if (str[i]=='1')
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val += 1;
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else if (base>2 && str[i]=='2')
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val += 2;
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else if (base>3 && str[i]=='3')
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val += 3;
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else if (base>4 && str[i]=='4')
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val += 4;
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else if (base>5 && str[i]=='5')
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val += 5;
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else if (base>6 && str[i]=='6')
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val += 6;
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else if (base>7 && str[i]=='7')
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val += 7;
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else if (base>8 && str[i]=='8')
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val += 8;
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else if (base>9 && str[i]=='9')
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val += 9;
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else if (base>10 && (str[i]=='a' || str[i]=='A'))
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val += 10;
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else if (base>11 && (str[i]=='b' || str[i]=='B'))
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val += 11;
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else if (base>12 && (str[i]=='c' || str[i]=='C'))
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val += 12;
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else if (base>13 && (str[i]=='d' || str[i]=='D'))
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val += 13;
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else if (base>14 && (str[i]=='e' || str[i]=='E'))
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val += 14;
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else if (base>15 && (str[i]=='f' || str[i]=='F'))
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val += 15;
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else
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break;
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}
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if (endptr)
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*endptr = (void *)&str[i]; /* avoid warning */
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return val;
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}
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#else
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typedef int filenotempty; /* make ISO standard happy */
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#endif
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