Bernd Paysan <[EMAIL PROTECTED]> writes:
> On Wednesday 05 April 2006 19:13, Robert Epprecht wrote:
>> Bernd Paysan <[EMAIL PROTECTED]> writes:
>> How can I access errno?
>
> Under Linux, the function __errno_location returns a pointer to errno.
Thank you.
> However, your declaration is wrong. You say int int ptr, but the
> signature of open() is ptr int int. Gforth reverses C's stack, so you
> really have to pass the pointer to the string first, and then the
> integer arguments.
now I'm quite confused ;-)
I have found this declaration in lib.fs CVS-1.15
libc open int int ptr (int) open
When you say
> you really have to pass the pointer to the string first, and then the
> integer arguments.
do you mean the pointer should be pushed on the (forth) stack first,
or should it be the TOS so that the C interface passes it first to C?
If C would declare a function as (say)
int something(*buf, int);
should I declare now
libc something ptr int (int) something
or as
libc something int ptr (int) something
Would that be
something ( int ptr -- int )
or
something ( ptr int -- int )
in Forth?
Simple things can appear so complicated sometimes...
Robert Epprecht
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