Cleanup in elf.c with .bss section clean; adm command mounts cdrom instead of floppy...
[ZeXOS.git] / libc / stdlib / strtoul.c
blobcfc7fec0a9542015ea7f6471d2b1a9c92ae12b52
1 /*
2 * ZeX/OS
3 * Copyright (C) 2009 Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 unsigned long strtoul (const char *nptr, char **endptr, int base)
21 int nDigit;
22 unsigned long acc = 0;
24 while((nDigit = *nptr) != 0)
26 // If the character is not an alphanumeric, break
27 // if(!isalnum(nDigit))
28 // break;
30 // Convert to digit
31 nDigit -= '0';
32 if(nDigit > 9)
33 nDigit -= ('A' - '9' - 1);
34 if(nDigit > base - 1)
35 break;
37 // Move the value to the next rank and add the digit
38 acc *= base;
39 acc += nDigit;
40 nptr ++;
43 if(endptr != 0)
44 *endptr = (char *) nptr;
46 return acc;