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/* fornax - distributed network
*
* by team teso
*
* scripting capabilities routines
*/
#include <stdio.h>
#include "branch.h"
#include "call.h"
#include "compiler.h"
#include "element.h"
#include "functions.h"
#include "script.h"
#include "symbol.h"
sym_elem ** gl_ns = NULL;
extern function gl_fnc[];
/* static functions
*/
void scr_elem_exec (element **el);
static void scr_call (call *c);
static void scr_branch (branch * br);
/* scr_elem_exec
*
* execute the element list pointed to by `el'
*
* return in any case
*/
void
scr_elem_exec (element **el)
{
int el_ptr;
element * ec;
if (el == NULL || el[0] == NULL)
return;
for (el_ptr = 0 ; el[el_ptr] != NULL ; ++el_ptr) {
ec = el[el_ptr];
switch (ec->type) {
case (ELEM_TYPE_CALL):
scr_call ((call *) ec->data);
break;
case (ELEM_TYPE_BRANCH):
scr_branch ((branch *) ec->data);
break;
/* in case it is a set element, just add the symbol element
* to the global namespace
*/
case (ELEM_TYPE_SET):
gl_ns = scr_ns_add (gl_ns, (sym_elem *) ec->data);
break;
/* should never happen
*/
default:
break;
}
}
return;
}
/* scr_call
*
* make a call, just like et did when he phoned home. well, not really, but
* quite similar
*
* return in any case
*/
static void
scr_call (call *c)
{
fnc_handler f_h;
/* nothing to execute today, baby
*/
if (c == NULL || c->name == NULL)
return;
f_h = fnc_find (gl_fnc, c->name);
/* no function found or nop -> return
*/
if (f_h == NULL)
return;
(void) f_h (c->parameters);
return;
}
static void
scr_branch (branch * br)
{
if (cond_verify (br->cond) == 1) {
scr_elem_exec (br->b_true);
} else {
scr_elem_exec (br->b_false);
}
return;
}
sym_elem **
scr_ns_add (sym_elem **ns, sym_elem *elem)
{
return (sym_elem_add (ns, elem));
}
int
scr_exec (char *script)
{
element ** scr;
scr = cp_compile (script, strlen (script));
if (scr == NULL)
return (0);
scr_elem_exec (scr);
elem_list_free (scr);
return (1);
}
element **
scr_compile (char *script)
{
element ** scr = NULL;
if (script != NULL)
scr = cp_compile (script, strlen (script));
return (scr);
}
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