STRTOL(3)STRTOL(3)NAMEstrtol - convert a string to a long integer
SYNOPSIS
#include <stdlib.h>
#include <limits.h>
long strtol(char *nptr, char **endptr, int base);
DESCRIPTION
Strtol converts the string in nptr to a long value according to the
given base, which must be between 2 and 36 inclusive, or be the special
value 0.
The string may begin with an arbitrary amount of white space (as deter‐
mined by isspace; see ctype(3)), followed by a single optional `+' or
`-' sign. If base is zero or 16, the string may then include a `0x'
prefix, and the number will be read in base 16; otherwise, a zero base
is taken as 10 (decimal) unless the next character is `0', in which
case it is taken as 8 (octal).
The remainder of the string is converted to a long value in the obvious
manner, stopping at the first character which is not a valid digit in
the given base. (In bases above 10, the letter `A' in either upper or
lower case represents 10, `B' represents 11, and so forth, with `Z'
representing 35.)
If endptr is non nil, strtol stores the address of the first invalid
character in *endptr. If there were no digits at all, however, strtol
stores the original value of nptr in *endptr. (Thus, if *nptr is not
'\0' but **endptr is '\0' on return, the entire string was valid.)
RETURN VALUE
Strtol returns the result of the conversion, unless the value would
underflow or overflow. If an underflow occurs, strtol returns
LONG_MIN. If an overflow occurs, strtol returns LONG_MAX. In both
cases, errno is set to ERANGE.
ERRORS
[ERANGE]
The given string was out of range; the value converted has been
clamped.
SEE ALSOatof(3), atoi(3), atol(3), strtod(3), strtoul(3)STANDARDS
Strtol conforms to ANSI X3.159-1989 (``ANSI C'').
BUGS
Ignores the current locale.
4.4 Berkeley Distribution May 15, 1990 STRTOL(3)
