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32 .\" @(#)strtol.3 8.1 (Berkeley) 6/4/93
38 .Nm strtol , strtoll , strtoimax , strtoq
39 .Nd "convert a string value to a"
40 .Vt long , "long long" , intmax_t
50 .Fn strtol "const char * restrict nptr" "char ** restrict endptr" "int base"
52 .Fn strtoll "const char * restrict nptr" "char ** restrict endptr" "int base"
55 .Fn strtoimax "const char * restrict nptr" "char ** restrict endptr" "int base"
60 .Fn strtoq "const char *nptr" "char **endptr" "int base"
65 converts the string in
73 converts the string in
81 converts the string in
89 converts the string in
94 The conversion is done according to the given
96 which must be between 2 and 36 inclusive,
97 or be the special value 0.
99 The string may begin with an arbitrary amount of white space
102 followed by a single optional
110 the string may then include a
112 prefix, and the number will be read in base 2; or it may include a
115 and the number will be read in base 16; otherwise, a zero
117 is taken as 10 (decimal) unless the next character is
119 in which case it is taken as 8 (octal).
121 The remainder of the string is converted to a
122 .Vt long , "long long" , intmax_t
125 value in the obvious manner,
126 stopping at the first character which is not a valid digit
128 (In bases above 10, the letter
130 in either upper or lower case
133 represents 11, and so forth, with
142 stores the address of the first invalid character in
144 If there were no digits at all, however,
146 stores the original value of
158 on return, the entire string was valid.)
167 return the result of the conversion,
168 unless the value would underflow or overflow.
169 If no conversion could be performed, 0 is returned and
174 (the last feature is not portable across all platforms).
175 If an overflow or underflow occurs,
179 and the function return value is clamped according
180 to the following table.
181 .Bl -column -offset indent ".Fn strtoimax" ".Sy underflow" ".Sy overflow"
182 .It Sy Function Ta Sy underflow Ta Sy overflow
183 .It Fn strtol Ta Dv LONG_MIN Ta Dv LONG_MAX
184 .It Fn strtoll Ta Dv LLONG_MIN Ta Dv LLONG_MAX
185 .It Fn strtoimax Ta Dv INTMAX_MIN Ta Dv INTMAX_MAX
186 .It Fn strtoq Ta Dv LLONG_MIN Ta Dv LLONG_MAX
194 no conversion could be performed
195 (the last feature is not portable across all platforms).
197 The given string was out of range; the value converted has been clamped.
223 function is deprecated.