STRTOL(3) Library Functions Manual STRTOL(3)
NAME
strtol - convert string value to a long
SYNOPSIS
#include <stdlib.h>
#include <limits.h>
long
strtol(nptr, endptr, base)
char *nptr;
char **endptr;
int base;
DESCRIPTION
The strtol() function converts the string in nptr to a long value. The conversion is done 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 determined by isspace(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 ` ' but **endptr is ` ' on return, the entire string was
valid.)
RETURN VALUES
The strtol() function 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 ALSO
atof(3), atoi(3), atol(3), strtoul(3)
STANDARDS
The strtol() function conforms to ANSI C X3.159-1989 (``ANSI C'').
BUGS
Ignores the current locale.
4.4 Berkeley Distribution January 12, 1996 STRTOL(3)
