1 /* $NetBSD: _strtoul.h,v 1.1 2008/08/20 12:42:26 joerg Exp $ */
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31 * Original version ID:
32 * NetBSD: src/lib/libc/locale/_wcstoul.h,v 1.2 2003/08/07 16:43:03 agc Exp
36 * function template for strtoul, strtoull and strtoumax.
39 * _FUNCNAME : function name
40 * __UINT : return type
41 * __UINT_MAX : upper limit of the return type
45 _FUNCNAME(const char *nptr
, char **endptr
, int base
)
50 int i
, neg
, any
, cutlim
;
52 _DIAGASSERT(nptr
!= NULL
);
53 /* endptr may be NULL */
55 /* check base value */
56 if (base
&& (base
< 2 || base
> 36)) {
57 #if !defined(_KERNEL) && !defined(_STANDALONE)
61 panic("%s: invalid base %d", __func__
, base
);
66 * Skip white space and pick up leading +/- sign if any.
67 * If base is 0, allow 0x for hex and 0 for octal, else
68 * assume decimal; if base is already 16, allow 0x.
82 if ((base
== 0 || base
== 16) &&
83 c
== '0' && (*s
== 'x' || *s
== 'X')) {
89 base
= (c
== '0' ? 8 : 10);
92 * See strtol for comments as to the logic used.
94 cutoff
= __UINT_MAX
/ (__UINT
)base
;
95 cutlim
= (int)(__UINT_MAX
% (__UINT
)base
);
96 for (acc
= 0, any
= 0;; c
= *s
++) {
100 i
= c
- (isupper(c
) ? 'A' - 10 : 'a' - 10);
107 if (acc
> cutoff
|| (acc
== cutoff
&& i
> cutlim
)) {
109 #if !defined(_KERNEL) && !defined(_STANDALONE)
125 /* LINTED interface specification */
126 *endptr
= __UNCONST(any
? s
- 1 : nptr
);