[fpc-pascal]getting my local ip

Michael Van Canneyt michael.vancanneyt at wisa.be
Fri Mar 15 16:12:19 CET 2002

On Fri, 15 Mar 2002, ron wilson wrote:

> ok - thats what i thought - so they both point to the same memory area.  my
> question is this then:  how do i access the list.  i guess my pascal syntax
> is too far gone.  i understand pointers pretty well, but in this case, i'm
> lost.  what we have here is a pointer to pchar - ^pchar.  so to access the
> first pchar in the list i would code this:
> program test;
> var
>   pc: pchar;
>   h: hostent;
> begin
>   /* fill h here */
>   pc:=stralloc(sizeof(h.h_addr_list^));
>   strpcopy(pc,h.h_addr_list^);
>   writeln(pc);
> end.

No, no. You can use the fact that a pointer can be considered as a
pointer to an array.

While h.h_addr_list[i]<>Nil do
  PC:=h_addr_list[i];  // Get pchar pointer
  S:=StrPas(pc);       // Convert to pascal string.
  // Do something with S.

Have a look at the inet unit, the GetAlias method. It does exactly the
same for Linux.


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