mirror of
https://gitlab.nic.cz/labs/bird.git
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101 lines
2.1 KiB
Plaintext
101 lines
2.1 KiB
Plaintext
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/*
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* BIRD - filters
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*
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* Copyright 1998 Pavel Machek
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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CF_HDR
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#include "nest/bird.h"
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#include "filter/filter.h"
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#include "lib/resource.h"
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#include "lib/socket.h"
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#include "lib/timer.h"
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#include "nest/protocol.h"
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#include "nest/iface.h"
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#include "nest/route.h"
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CF_DECLS
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CF_KEYWORDS(FUNCTION, FILTER, PRINTDEBUG, INT, PRINT)
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%type <x> expr
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CF_GRAMMAR
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config:
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program {
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printf( "Wow, we have full program\n" );
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return 0;
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}
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;
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program: /* EMPTY */
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| program function
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;
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CF_ADDTO(conf, function)
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function:
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FUNCTION SYM '(' ')' '{' expr '}' {
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extern struct f_instruction *last_func;
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if ($2->class != SYM_VOID) cf_error("Symbol already defined" );
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$2->class = SYM_FUNCTION;
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$2->aux = $6;
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last_func = $6;
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printf("Hmm, we've got one function here\n");
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}
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;
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CF_ADDTO(conf, filter)
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filter:
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FILTER SYM '{' expr '}' {
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if ($2->class != SYM_VOID) cf_error("Symbol already defined" );
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$2->class = SYM_FILTER;
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$2->aux = $4;
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printf( "We have new filter defined (%s)\n", $2->name )
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}
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;
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/* Programs */
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expr: /* EMPTY */ { $$ = NULL; }
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| expr ';' expr {
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$$ = cfg_alloc(sizeof(struct f_instruction));
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printf( "We've got statement here\n" );
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$$->code = ',';
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$$->arg1 = $1;
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$$->arg2 = $3;
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}
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| INT SYM ';' {
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if ($2->class != SYM_VOID) cf_error("Symbol already defined, can not use as variable\n" );
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$2->class = SYM_VARIABLE_INT;
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printf( "New variable\n" );
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$$ = NULL;
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}
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| SYM '=' cexpr {
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$$ = cfg_alloc(sizeof(struct f_instruction));
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printf( "Ook, we'll set value\n" );
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if ($1->class != SYM_VARIABLE_INT)
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cf_error( "You may only set variables\n" );
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$$->code = '=';
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$$->arg1 = $1;
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$$->arg2 = $3;
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}
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| PRINT '(' SYM ')' {
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$$ = cfg_alloc(sizeof(struct f_instruction));
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printf( "Ook, we'll print something\n" );
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$$->code = 'p';
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$$->arg1 = $3;
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$$->arg2 = NULL;
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}
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| PRINTDEBUG {
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$$ = cfg_alloc(sizeof(struct f_instruction));
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$$->code = 'D';
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$$->arg1 = $$->arg2 = NULL;
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}
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;
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CF_END
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