strtol man page on 4.4BSD

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STRTOL(3)		 BSD Library Functions Manual		     STRTOL(3)

NAME
     strtol, strtoq — convert string value to a long or quad_t integer

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

     long
     strtol(char *nptr, char **endptr, int base);

     #include <sys/types.h>
     #include <stdlib.h>
     #include <limits.h>

     quad_t
     strtoq(char *nptr, char **endptr, int base);

DESCRIPTION
     The strtol() function converts the string in nptr to a long value.	 The
     strtoq() function converts the string in nptr to a quad_t 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 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’ represent‐
     ing 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 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), strtod(3), strtoul(3)

STANDARDS
     The strtol() function conforms to ANSI X3.159-1989 (“ANSI C89”).

BUGS
     Ignores the current locale.

BSD				 June 4, 1993				   BSD
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