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4 .\" This code is derived from software contributed to Berkeley by
5 .\" Chris Torek and the American National Standards Committee X3,
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36 .\" @(#)strtoul.3 8.1 (Berkeley) 6/4/93
37 .\" $FreeBSD: src/lib/libc/stdlib/strtoul.3,v 1.22 2006/05/20 21:11:35 maxim Exp $
38 .\" $DragonFly: src/lib/libc/stdlib/strtoul.3,v 1.4 2006/11/02 19:48:55 swildner Exp $
47 .Nd "convert a string to an"
48 .Vt "unsigned long" , "unsigned long long" , uintmax_t ,
58 .Fn strtoul "const char *nptr" "char **endptr" "int base"
59 .Ft "unsigned long long"
60 .Fn strtoull "const char *nptr" "char **endptr" "int base"
63 .Fn strtoumax "const char *nptr" "char **endptr" "int base"
68 .Fn strtouq "const char *nptr" "char **endptr" "int base"
73 converts the string in
81 converts the string in
84 .Vt "unsigned long long"
89 converts the string in
97 converts the string in
102 The conversion is done according to the given
104 which must be between 2 and 36 inclusive,
105 or be the special value 0.
107 The string may begin with an arbitrary amount of white space
110 followed by a single optional
118 the string may then include a
121 and the number will be read in base 16; otherwise, a zero
123 is taken as 10 (decimal) unless the next character is
125 in which case it is taken as 8 (octal).
127 The remainder of the string is converted to an
129 value in the obvious manner,
130 stopping at the end of the string
131 or at the first character that does not produce a valid digit
133 (In bases above 10, the letter
135 in either upper or lower case
138 represents 11, and so forth, with
147 stores the address of the first invalid character in
149 If there were no digits at all, however,
151 stores the original value of
163 on return, the entire string was valid.)
172 return either the result of the conversion
173 or, if there was a leading minus sign,
174 the negation of the result of the conversion,
175 unless the original (non-negated) value would overflow;
194 If no conversion could be performed, 0 is returned and
199 (the last feature is not portable across all platforms).
206 no conversion could be performed
207 (the last feature is not portable across all platforms).
209 The given string was out of range; the value converted has been clamped.
231 function is deprecated.