diff options
Diffstat (limited to 'filter')
| -rw-r--r-- | filter/Makefile | 5 | ||||
| -rw-r--r-- | filter/config.Y | 100 | ||||
| -rw-r--r-- | filter/f-util.c | 67 | ||||
| -rw-r--r-- | filter/filter.h | 21 |
4 files changed, 193 insertions, 0 deletions
diff --git a/filter/Makefile b/filter/Makefile new file mode 100644 index 0000000..1e7fb68 --- /dev/null +++ b/filter/Makefile @@ -0,0 +1,5 @@ +source=f-util.c +root-rel=../ +dir-name=filter + +include ../Rules diff --git a/filter/config.Y b/filter/config.Y new file mode 100644 index 0000000..265463d --- /dev/null +++ b/filter/config.Y @@ -0,0 +1,100 @@ +/* + * 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> expr + +CF_GRAMMAR + +config: + program { + printf( "Wow, we have full program\n" ); + return 0; + } + ; + +program: /* EMPTY */ + | program function + ; + +CF_ADDTO(conf, function) +function: + FUNCTION SYM '(' ')' '{' expr '}' { + extern struct f_instruction *last_func; + if ($2->class != SYM_VOID) cf_error("Symbol already defined" ); + $2->class = SYM_FUNCTION; + $2->aux = $6; + last_func = $6; + printf("Hmm, we've got one function here\n"); + } + ; + +CF_ADDTO(conf, filter) +filter: + FILTER SYM '{' expr '}' { + if ($2->class != SYM_VOID) cf_error("Symbol already defined" ); + $2->class = SYM_FILTER; + $2->aux = $4; + printf( "We have new filter defined (%s)\n", $2->name ) + } + ; + +/* Programs */ + +expr: /* EMPTY */ { $$ = NULL; } + | expr ';' expr { + $$ = cfg_alloc(sizeof(struct f_instruction)); + printf( "We've got statement here\n" ); + $$->code = ','; + $$->arg1 = $1; + $$->arg2 = $3; + } + | INT SYM ';' { + if ($2->class != SYM_VOID) cf_error("Symbol already defined, can not use as variable\n" ); + $2->class = SYM_VARIABLE_INT; + printf( "New variable\n" ); + $$ = NULL; + } + | SYM '=' cexpr { + $$ = cfg_alloc(sizeof(struct f_instruction)); + printf( "Ook, we'll set value\n" ); + if ($1->class != SYM_VARIABLE_INT) + cf_error( "You may only set variables\n" ); + $$->code = '='; + $$->arg1 = $1; + $$->arg2 = $3; + } + | PRINT '(' SYM ')' { + $$ = cfg_alloc(sizeof(struct f_instruction)); + printf( "Ook, we'll print something\n" ); + $$->code = 'p'; + $$->arg1 = $3; + $$->arg2 = NULL; + } + | PRINTDEBUG { + $$ = cfg_alloc(sizeof(struct f_instruction)); + $$->code = 'D'; + $$->arg1 = $$->arg2 = NULL; + } + ; + +CF_END diff --git a/filter/f-util.c b/filter/f-util.c new file mode 100644 index 0000000..df6babb --- /dev/null +++ b/filter/f-util.c @@ -0,0 +1,67 @@ +/* + * Filters: utility functions + * + * Copyright 1998 Pavel Machek <pavel@ucw.cz> + * + * Can be freely distributed and used under the terms of the GNU GPL. + */ + +#include <stdio.h> +#include <fcntl.h> +#include <unistd.h> +#include <sys/signal.h> + +#include "nest/bird.h" +#include "lib/lists.h" +#include "lib/resource.h" +#include "lib/socket.h" +#include "nest/route.h" +#include "nest/protocol.h" +#include "nest/iface.h" +#include "conf/conf.h" +#include "filter/filter.h" + +struct f_instruction *last_func = NULL; + +static void +interpret(struct f_instruction *what) +{ + struct symbol *sym; + if (!what) + return 0; + switch(what->code) { + case ',': + interpret(what->arg1); + interpret(what->arg2); + break; + case '=': + sym = what->arg1; + sym->aux = what->arg2; + break; + case 'p': + sym = what->arg1; + switch(sym->class) { + case SYM_VARIABLE_INT: + printf( "Printing: %d\n", sym->aux ); + break; + default: + printf( "Unknown type passed to print\n" ); + break; + } + break; + case 'D': + printf( "DEBUGGING PRINT\n" ); + break; + } +} + +void +filters_init(void) +{ + if (!last_func) + printf( "No function defined\n" ); + else { + interpret(last_func); + } +} + diff --git a/filter/filter.h b/filter/filter.h new file mode 100644 index 0000000..499be0a --- /dev/null +++ b/filter/filter.h @@ -0,0 +1,21 @@ +/* + * BIRD Internet Routing Daemon -- Configuration File Handling + * + * (c) 1998 Martin Mares <mj@ucw.cz> + * + * Can be freely distributed and used under the terms of the GNU GPL. + */ + +#ifndef _BIRD_FILT_H_ +#define _BIRD_FILT_H_ + +#include "lib/resource.h" + +/* Lexer */ + +struct f_instruction { + int code; + void *arg1, *arg2; +}; + +#endif |