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

NAME
     strtoul, strtoull - convert a string to an unsigned long or unsigned

SYNOPSIS
     #include <stdlib.h>
     #include <limits.h>

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

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

DESCRIPTION
     The strtoul() function converts the string in nptr to an unsigned long
     value.  The strtoull() function converts the string in nptr to a unsigned
     long 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 deter-
     mined 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 value in the
     obvious manner, stopping at the end of the string or at the first charac-
     ter that does not produce 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, strtoul() stores the address of the first invalid
     character in *endptr. If there were no digits at all, however, strtoul()
     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 VALUES
     Upon success the strtoul() and strtoull() functions return either the re-
     sult of the conversion or, if there was a leading minus sign, the nega-
     tion of the result of the conversion, unless the original (non-negated)
     value would overflow.  In the case of an overflow the functions return
     ULONG_MAX and UQUAD_MAX respectively and the global variable errno is set
     to ERANGE.

ERRORS
     [ERANGE]  The given string was out of range; the value converted has been
	       clamped.

SEE ALSO
     strtol(3)

STANDARDS
     The strtoul() function conforms to ANSI C X3.159-1989 (``ANSI C '').

BUGS
     Ignores the current locale.

     The strtouq() function is identical to strtoull() and is provided for
     compatibility with older software.

BSDI BSD/OS			March 10, 2000				     1

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