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|
/*
* BIRD - filters
*
* Copyright 1998 Pavel Machek
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
CF_HDR
#include "nest/bird.h"
#include "filter/filter.h"
#include "lib/resource.h"
#include "lib/socket.h"
#include "lib/timer.h"
#include "nest/protocol.h"
#include "nest/iface.h"
#include "nest/route.h"
CF_DECLS
CF_KEYWORDS(FUNCTION, FILTER, PRINTDEBUG, INT, PRINT)
%type <x> term
%type <x> cmds
CF_GRAMMAR
CF_ADDTO(conf, function)
function:
FUNCTION SYM '(' ')' '{' cmds '}' {
extern struct f_instruction *last_func;
if ($2->class != SYM_VOID) cf_error("Symbol already defined" );
$2->class = SYM_FUNCTION;
$2->def = $6;
last_func = $6;
printf("Hmm, we've got one function here\n");
}
;
CF_ADDTO(conf, filter)
filter:
FILTER SYM '{' cmds '}' {
if ($2->class != SYM_VOID) cf_error("Symbol already defined" );
$2->class = SYM_FILTER;
$2->def = $4;
printf( "We have new filter defined (%s)\n", $2->name )
}
;
/* Programs */
cmds:
term {
if ($1) {
$1->next = NULL;
$$ = $1;
} else $$ = NULL;
}
| term ';' cmds {
if ($1) {
$1->next = $3;
$$ = $1;
} else $$ = $3;
}
;
term:
/* EMPTY */ {
$$ = NULL;
}
| INT SYM {
if ($2->class != SYM_VOID) cf_error("Symbol already defined, can not use as variable\n" );
$2->class = SYM_VARIABLE_INT;
printf( "New variable\n" );
$$ = NULL;
}
| SYM '=' expr {
$$ = f_new_inst();
printf( "Ook, we'll set value\n" );
if ($1->class != SYM_VARIABLE_INT)
cf_error( "You may only set variables\n" );
$$->code = '=';
$$->arg1 = $1;
$$->arg2 = $3;
}
| PRINT '(' SYM ')' {
$$ = f_new_inst();
printf( "Ook, we'll print something\n" );
$$->code = 'p';
$$->arg1 = $3;
$$->arg2 = NULL;
}
| PRINTDEBUG {
$$ = f_new_inst();
$$->code = 'D';
$$->arg1 = $$->arg2 = NULL;
}
;
CF_END
|
