strtol()

[Guy Harris]

> What does this do?  It doesn't seem to exist on my 4.3 system.  I
> suspect it's a SysV library fn, so it seems like I'll have to write it
> myself.

Yes, it's a generalization of "atol"; it first appeared in System V.  It is
passed a pointer to a "char *"; if this pointer is non-null, it will return
a pointer to the first character after the value it converted.  It is also
passed a radix, so it can convert hex or octal numbers; if the radix is 0,
it converts the number as if it were a C constant (if it begins with "0x",
it's hex; otherwise, if it begins with "0", it's octal; otherwise, it's
decimal).

> getnum()
> {
>     return (int)strtol(lineptr, &lineptr, 10);
> }

As you can probably infer, the "pointer to pointer" is the second argument
and the radix is the third argument.
-- 
	Guy Harris
	{ihnp4, decvax, seismo, decwrl, ...}!sun!guy
	guy at sun.com (or guy at sun.arpa)