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36 .Nm strtoul , strtoull , strtoumax , strtouq
37 .Nd "convert a string to an"
38 .Vt "unsigned long" , "unsigned long long" , uintmax_t ,
48 .Fn strtoul "const char * restrict nptr" "char ** restrict endptr" "int base"
49 .Ft "unsigned long long"
50 .Fn strtoull "const char * restrict nptr" "char ** restrict endptr" "int base"
53 .Fn strtoumax "const char * restrict nptr" "char ** restrict endptr" "int base"
58 .Fn strtouq "const char *nptr" "char **endptr" "int base"
63 converts the string in
71 converts the string in
74 .Vt "unsigned long long"
79 converts the string in
87 converts the string in
92 The conversion is done according to the given
94 which must be between 2 and 36 inclusive,
95 or be the special value 0.
97 The string may begin with an arbitrary amount of white space
100 followed by a single optional
108 the string may then include a
110 prefix, and the number will be read in base 2; or it may include a
113 and the number will be read in base 16; otherwise, a zero
115 is taken as 10 (decimal) unless the next character is
117 in which case it is taken as 8 (octal).
119 The remainder of the string is converted to an
121 value in the obvious manner,
122 stopping at the end of the string
123 or at the first character that does not produce a valid digit
125 (In bases above 10, the letter
127 in either upper or lower case
130 represents 11, and so forth, with
139 stores the address of the first invalid character in
141 If there were no digits at all, however,
143 stores the original value of
155 on return, the entire string was valid.)
164 return either the result of the conversion
165 or, if there was a leading minus sign,
166 the negation of the result of the conversion,
167 unless the original (non-negated) value would overflow;
186 If no conversion could be performed, 0 is returned and
191 (the last feature is not portable across all platforms).
198 no conversion could be performed
199 (the last feature is not portable across all platforms).
201 The given string was out of range; the value converted has been clamped.
223 function is deprecated.