2 * Copyright (c) 2014 Regents of the University of California.
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6 * modification, are permitted provided that the following conditions
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12 * documentation and/or other materials provided with the distribution.
13 * 3. [rescinded 22 July 1999]
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37 #ifdef HAVE_SYS_PARAM_H
38 #include <sys/param.h>
41 #ifdef NEED_DECLARATION_ERRNO
48 #include "safe-ctype.h"
53 typedef unsigned long long ullong_type
;
56 #define ULLONG_MAX (~(ullong_type)0) /* 0xFFFFFFFFFFFFFFFF */
60 * Convert a string to an unsigned long long integer.
62 * Ignores `locale' stuff. Assumes that the upper and lower case
63 * alphabets and digits are each contiguous.
66 strtoull(const char *nptr
, char **endptr
, register int base
)
68 register const char *s
= nptr
;
69 register ullong_type acc
;
71 register ullong_type cutoff
;
72 register int neg
= 0, any
, cutlim
;
75 * See strtol for comments as to the logic used.
85 if ((base
== 0 || base
== 16) &&
86 c
== '0' && (*s
== 'x' || *s
== 'X')) {
92 base
= c
== '0' ? 8 : 10;
93 cutoff
= (ullong_type
)ULLONG_MAX
/ (ullong_type
)base
;
94 cutlim
= (ullong_type
)ULLONG_MAX
% (ullong_type
)base
;
95 for (acc
= 0, any
= 0;; c
= *s
++) {
99 c
-= ISUPPER(c
) ? 'A' - 10 : 'a' - 10;
104 if (any
< 0 || acc
> cutoff
|| (acc
== cutoff
&& c
> cutlim
))
118 *endptr
= (char *) (any
? s
- 1 : nptr
);
122 #endif /* ifdef HAVE_LONG_LONG */
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