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Filter: Use common initializer for undefined variables and eattrs.

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Undefined paths and clists should use typed f_val with empty adata
instead of just void f_val. Use common initializer to handle both
variables and eattrs.
This commit is contained in:
Ondrej Zajicek 2023-09-13 06:21:26 +02:00
parent 7395b97daf
commit a3dc26455d
3 changed files with 28 additions and 51 deletions
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28
filter/config.Y
View File

@ -244,23 +244,6 @@ f_new_lc_item(u32 f1, u32 t1, u32 f2, u32 t2, u32 f3, u32 t3)
return t;
}
static inline struct f_inst *
f_const_empty(enum f_type t)
{
switch (t) {
case T_PATH:
case T_CLIST:
case T_ECLIST:
case T_LCLIST:
return f_new_inst(FI_CONSTANT, (struct f_val) {
.type = t,
.val.ad = &null_adata,
});
default:
return f_new_inst(FI_CONSTANT, (struct f_val) {});
}
}
/*
* Remove all new lines and doubled whitespaces
* and convert all tabulators to spaces
@ -914,11 +897,12 @@ term:
| term_dot_method
| '+' EMPTY '+' { $$ = f_const_empty(T_PATH); }
| '-' EMPTY '-' { $$ = f_const_empty(T_CLIST); }
| '-' '-' EMPTY '-' '-' { $$ = f_const_empty(T_ECLIST); }
| '-' '-' '-' EMPTY '-' '-' '-' { $$ = f_const_empty(T_LCLIST); }
| PREPEND '(' term ',' term ')' { $$ = f_dispatch_method_x("prepend", $3->type, $3, $5); }
| '+' EMPTY '+' { $$ = f_new_inst(FI_CONSTANT, val_empty(T_PATH)); }
| '-' EMPTY '-' { $$ = f_new_inst(FI_CONSTANT, val_empty(T_CLIST)); }
| '-' '-' EMPTY '-' '-' { $$ = f_new_inst(FI_CONSTANT, val_empty(T_ECLIST)); }
| '-' '-' '-' EMPTY '-' '-' '-' { $$ = f_new_inst(FI_CONSTANT, val_empty(T_LCLIST)); }
| PREPEND '(' term ',' term ')' { $$ = f_dispatch_method_x("prepend", $3->type, $3, $5); }
| ADD '(' term ',' term ')' { $$ = f_dispatch_method_x("add", $3->type, $3, $5); }
| DELETE '(' term ',' term ')' { $$ = f_dispatch_method_x("delete", $3->type, $3, $5); }
| FILTER '(' term ',' term ')' { $$ = f_dispatch_method_x("filter", $3->type, $3, $5); }

20
filter/data.h
View File

@ -318,14 +318,32 @@ const struct adata *lclist_filter(struct linpool *pool, const struct adata *list
/* Special undef value for paths and clists */
static inline int
undef_value(struct f_val v)
val_is_undefined(struct f_val v)
{
return ((v.type == T_PATH) || (v.type == T_CLIST) ||
(v.type == T_ECLIST) || (v.type == T_LCLIST)) &&
(v.val.ad == &null_adata);
}
static inline struct f_val
val_empty(enum f_type t)
{
switch (t)
{
case T_PATH:
case T_CLIST:
case T_ECLIST:
case T_LCLIST:
return (struct f_val) { .type = t, .val.ad = &null_adata };
default:
return (struct f_val) { };
}
}
extern const struct f_val f_const_empty_prefix_set;
enum filter_return f_eval(const struct f_line *expr, struct linpool *tmp_pool, struct f_val *pres);

31
filter/f-inst.c
View File

@ -493,7 +493,7 @@
INST(FI_DEFINED, 1, 1) {
ARG_ANY(1);
RESULT(T_BOOL, i, (v1.type != T_VOID) && !undef_value(v1));
RESULT(T_BOOL, i, (v1.type != T_VOID) && !val_is_undefined(v1));
}
METHOD_R(T_NET, type, T_ENUM_NETTYPE, i, v1.val.net->type);
@ -519,7 +519,7 @@
/* New variable is always the last on stack */
uint pos = curline.vbase + sym->offset;
fstk->vstk[pos] = (struct f_val) { };
fstk->vstk[pos] = val_empty(sym->class & 0xff);
fstk->vcnt = pos + 1;
}
@ -806,32 +806,7 @@
eattr *e = ea_find(*fs->eattrs, da.ea_code);
if (!e) {
/* A special case: undefined as_path looks like empty as_path */
if (da.type == EAF_TYPE_AS_PATH) {
RESULT_(T_PATH, ad, &null_adata);
break;
}
/* The same special case for int_set */
if (da.type == EAF_TYPE_INT_SET) {
RESULT_(T_CLIST, ad, &null_adata);
break;
}
/* The same special case for ec_set */
if (da.type == EAF_TYPE_EC_SET) {
RESULT_(T_ECLIST, ad, &null_adata);
break;
}
/* The same special case for lc_set */
if (da.type == EAF_TYPE_LC_SET) {
RESULT_(T_LCLIST, ad, &null_adata);
break;
}
/* Undefined value */
RESULT_VOID;
RESULT_VAL(val_empty(da.f_type));
break;
}