1 /* $NetBSD: _strtoul.h,v 1.1 2008/08/20 12:42:26 joerg Exp $ */
4 * SPDX-License-Identifier: BSD-3-Clause
6 * Copyright (c) 1990, 1993
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21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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33 * Original version ID:
34 * NetBSD: src/lib/libc/locale/_wcstoul.h,v 1.2 2003/08/07 16:43:03 agc Exp
38 * function template for strtoul, strtoull and strtoumax.
41 * _FUNCNAME : function name
42 * __UINT : return type
43 * __UINT_MAX : upper limit of the return type
47 _FUNCNAME(const char *nptr, char **endptr, int base)
52 int any, cutlim, i, neg;
54 /* check base value */
55 if (base && (base < 2 || base > 36)) {
56 #if !defined(_KERNEL) && !defined(_STANDALONE)
60 panic("%s: invalid base %d", __func__, base);
65 * Skip white space and pick up leading +/- sign if any.
66 * If base is 0, allow 0x for hex and 0 for octal, else
67 * assume decimal; if base is already 16, allow 0x.
81 if ((base == 0 || base == 16) &&
82 c == '0' && (*s == 'x' || *s == 'X') &&
83 ((s[1] >= '0' && s[1] <= '9') ||
84 (s[1] >= 'A' && s[1] <= 'F') ||
85 (s[1] >= 'a' && s[1] <= 'f'))) {
90 if ((base == 0 || base == 2) &&
91 c == '0' && (*s == 'b' || *s == 'B') &&
92 (s[1] >= '0' && s[1] <= '1')) {
98 base = (c == '0' ? 8 : 10);
101 * See strtol for comments as to the logic used.
103 cutoff = __UINT_MAX / (__UINT)base;
104 cutlim = (int)(__UINT_MAX % (__UINT)base);
105 for (acc = 0, any = 0;; c = *s++) {
109 i = c - (isupper(c) ? 'A' - 10 : 'a' - 10);
116 if (acc > cutoff || (acc == cutoff && i > cutlim)) {
118 #if !defined(_KERNEL) && !defined(_STANDALONE)
134 /* LINTED interface specification */
135 *endptr = __DECONST(void *, any ? s - 1 : nptr);