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support "any" coercions for "-O gen-C++"

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This commit is contained in:
Vern Paxson 2021-06-02 15:58:16 -07:00
parent 7a96d2fa61
commit 47783cb9fd
3 changed files with 43 additions and 0 deletions
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16
src/script_opt/CPP/Exprs.cc
View file

@ -126,6 +126,22 @@ string CPPCompile::GenExpr(const Expr* e, GenType gt, bool top_level)
GenTypeName(e->GetType()) + ")";
return GenericValPtrToGT(gen, e->GetType(), gt);
case EXPR_TO_ANY_COERCE:
return GenExpr(e->GetOp1(), GEN_VAL_PTR);
case EXPR_FROM_ANY_COERCE:
gen = string("from_any__CPP(") +
GenExpr(e->GetOp1(), GEN_VAL_PTR) + ", " +
GenTypeName(e->GetType()) + ")";
return GenericValPtrToGT(gen, e->GetType(), gt);
case EXPR_FROM_ANY_VEC_COERCE:
gen = string("from_any_vec__CPP(") +
GenExpr(e->GetOp1(), GEN_VAL_PTR) + ", " +
GenTypeName(e->GetType()->Yield()) + ")";
return GenericValPtrToGT(gen, e->GetType(), gt);
case EXPR_FIELD_ASSIGN:
case EXPR_INDEX_SLICE_ASSIGN:
case EXPR_INLINE:

19
src/script_opt/CPP/RuntimeOps.cc
View file

@ -75,6 +75,25 @@ ValPtr cast_value_to_type__CPP(const ValPtr& v, const TypePtr& t)
return result;
}
ValPtr from_any__CPP(const ValPtr& v, const TypePtr& t)
{
auto vt = v->GetType()->Tag();
if ( vt != t->Tag() && vt != TYPE_ERROR )
reporter->CPPRuntimeError("incompatible \"any\" type (%s vs. %s)",
type_name(vt), type_name(t->Tag()));
return v;
}
ValPtr from_any_vec__CPP(const ValPtr& v, const TypePtr& t)
{
if ( ! v->AsVectorVal()->Concretize(t) )
reporter->CPPRuntimeError("incompatible \"vector of any\" type");
return v;
}
SubNetValPtr addr_mask__CPP(const IPAddr& a, uint32_t mask)
{
if ( a.GetFamily() == IPv4 )

8
src/script_opt/CPP/RuntimeOps.h
View file

@ -55,6 +55,14 @@ extern ValPtr set_event__CPP(IDPtr g, ValPtr v, EventHandlerPtr& gh);
// A separate function in order to package up the error handling.
extern ValPtr cast_value_to_type__CPP(const ValPtr& v, const TypePtr& t);
// Convert a value of type "any" to the given concrete type. A separate
// function in order to package up the error handling.
extern ValPtr from_any__CPP(const ValPtr& v, const TypePtr& t);
// Convert a vector-of-any to a vector-of-t. A separate function in order
// to package up the error handling.
extern ValPtr from_any_vec__CPP(const ValPtr& v, const TypePtr& t);
// Returns the subnet corresponding to the given mask of the given address.
// A separate function in order to package up the error handling.
extern SubNetValPtr addr_mask__CPP(const IPAddr& a, uint32_t mask);