1 /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
8 * Convert a unicode string to an unsigned long integer.
10 * Ignores `locale' stuff. Assumes that the upper and lower case
11 * alphabets and digits are each contiguous.
16 wcstoul(const wchar_t *nptr, wchar_t **endptr, int base)
18 const wchar_t *s = nptr;
22 int neg = 0, any, cutlim;
25 * See strtol for comments as to the logic used.
29 } while (iswctype(c, _SPACE));
37 if ((base == 0 || base == 16) &&
38 c == L'0' && (*s == L'x' || *s == L'X'))
45 base = c == L'0' ? 8 : 10;
46 cutoff = (unsigned long)ULONG_MAX / (unsigned long)base;
47 cutlim = (unsigned long)ULONG_MAX % (unsigned long)base;
48 for (acc = 0, any = 0;; c = *s++)
50 if (iswctype(c, _DIGIT))
52 else if (iswctype(c, _ALPHA))
53 c -= iswctype(c, _UPPER) ? L'A' - 10 : L'a' - 10;
58 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
73 *endptr = any ? (wchar_t *)s - 1 : (wchar_t *)nptr;