STRTOUL(3)                  Linux Programmer's Manual                 STRTOUL(3)

       strtoul - convert a string to an unsigned long integer.

       #include <stdlib.h>

       unsigned long int strtoul(const char *nptr, char **endptr,
       int base)

       The strtoul() function converts the string in nptr to an unsigned 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 an unsigned 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, strtoul() stores the address of the first invalid
       character in *endptr.  If there were no digits at all, strtoul() 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.)

       The strtoul() function returns either the result of the conversion or, if
       there was a leading minus sign, the negation of the result of the
       conversion, unless the original (non-negated) value would overflow; in
       the latter case, strtoul() returns ULONG_MAX and sets the global variable
       errno to ERANGE.

       ERANGE The given string was out of range; the value converted has been

       SVID 3, BSD 4.3, ISO 9899

       atof(3), atoi(3), atol(3), strtod(3), strtol(3)

       Ignores the current locale.

GNU                              March 29, 1993                       STRTOUL(3)