OpenEuphoria

Re: one more C question ( mixedlib.e )

• Posted by cense <cense at mail.ru> Aug 31, 2000
• 534 views

On Thu, 31 Aug 2000, Bernie wrote:
>  cense:
>    I need to see the actual "C" function you are using to really understand
>    what you are doing so I can help you.
>    I think you probably will be passing a POINTER to a structure
>    because there is no way to pass the value of a structure.
>    You could only pass the value of a single entry that is contained
>    in a structure.
>    Normally you will pass a POINTER to a "C" function in a predefined
>    structure format that the "C" function is expecting. The "C"
>    function code then USES that POINTER to move data in and out of
>    the predefined structure and returns a flag to tell you if exceeded.
>
>    Hope this helps.
>
>    Bernie

Ok bernie, here is the C function prototype and the struct that this function
wants:

< fun C code >

/* this is the function ( you probaly know of it ) */
char *inet_ntoa( struct in_addr inaddr ); // does this really want a pointer?


/* here is the struct ( ya probably know about this one too ) */
struct in_addr {
  u_long s_addr; // 32-bit netid/hostid in network byte order
};

<end the fun of it all >

so does char *inet_ntoa( struct in_addr inaddr ); really want a pointer to a
in_addr struct or the "value"? im so confused when it comes to memory related
things and pointers in C.

--
cense
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