NAME
strtol - convert a string to a long integer.
SYNOPSIS
#include <stdlib.h>
long int strtol(const char *nptr, char **endptr, int base
DESCRIPTION
The strtol() function converts the string in nptr to a long
integer value according to the given base, which must be
between 2 and 36 inclusive, or be the special value 0.
The string must 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 int 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 not NULL, strtol() stores the address of the
first invalid character in *endptr. If there were no digits
at all, strtol() stores the original value of nptr in
*endptr. (Thus, if *nptr is not `\0' but **endptr is `\0'
on return, the entire string is valid.)
RETURN VALUE
The strtol() function returns the result of the conversion,
unless the value would underflow or overflow. If an under-
flow 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.
CONFORMING TO
SVID 3, BSD 4.3, ISO 9899
SEE ALSO
atof(3), atoi(3), atol(3),
BUGS
Ignores the current locale.