mirror of
https://github.com/reactos/reactos.git
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124 lines
2.8 KiB
C
124 lines
2.8 KiB
C
/*
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* ReactOS kernel
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* Copyright (C) 2005 ReactOS Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* $Id$
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*
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* PROJECT: ReactOS kernel
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* FILE: ntoskrnl/dbg/kdb_string.c
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* PURPOSE: Kernel debugger string functions
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* PROGRAMMER: Gregor Anich (blight@blight.eu.org)
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* UPDATE HISTORY:
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* Created 17/01/2005
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*/
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/* INCLUDES ******************************************************************/
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#include <ntoskrnl.h>
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#include <ctype.h>
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/* FUNCTIONS *****************************************************************/
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#if 0
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int
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_stricmp(
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const char *s1,
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const char *s2)
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{
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char c1, c2;
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for (;;)
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{
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c1 = tolower(*s1++);
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c2 = tolower(*s2++);
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if (c1 < c2)
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return -1;
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else if (c1 > c2)
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return 1;
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if (c1 == '\0')
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break;
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}
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return 0;
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}
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#endif /* unused */
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/*
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* Convert a string to an unsigned long integer.
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*
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* Ignores `locale' stuff. Assumes that the upper and lower case
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* alphabets and digits are each contiguous.
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*/
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unsigned long
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strtoul(const char *nptr, char **endptr, int base)
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{
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const char *s = nptr;
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unsigned long acc;
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int c;
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unsigned long cutoff;
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int neg = 0, any, cutlim;
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/*
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* See strtol for comments as to the logic used.
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*/
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do {
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c = *s++;
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} while (isspace(c));
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if (c == '-')
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{
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neg = 1;
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c = *s++;
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}
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else if (c == '+')
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c = *s++;
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if ((base == 0 || base == 16) &&
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c == '0' && (*s == 'x' || *s == 'X'))
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{
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c = s[1];
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s += 2;
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base = 16;
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}
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if (base == 0)
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base = c == '0' ? 8 : 10;
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cutoff = (unsigned long)0xffffffff / (unsigned long)base;
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cutlim = (unsigned long)0xffffffff % (unsigned long)base;
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for (acc = 0, any = 0;; c = *s++)
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{
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if (isdigit(c))
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c -= '0';
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else if (isalpha(c))
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c -= isupper(c) ? 'A' - 10 : 'a' - 10;
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else
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break;
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if (c >= base)
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break;
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if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
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any = -1;
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else {
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any = 1;
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acc *= base;
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acc += c;
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}
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}
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if (any < 0)
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{
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acc = 0xffffffff;
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}
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else if (neg)
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acc = -acc;
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if (endptr != 0)
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*endptr = any ? (char *)((size_t)(s - 1)) : (char *)((size_t)nptr);
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return acc;
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}
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