Mirror/zeek
1
0
Fork 0
mirror of https://github.com/zeek/zeek.git synced 2025-10-10 02:28:21 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 3

GH-393: Add slice notation for vectors

Browse source
This commit is contained in:
Tim Wojtulewicz 2019-06-12 13:48:56 -07:00
parent 0ab1f0fe25
commit 0af79a7a16
4 changed files with 44 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

35
src/Expr.cc
View file

@ -2913,8 +2913,8 @@ IndexExpr::IndexExpr(Expr* arg_op1, ListExpr* arg_op2, bool is_slice)
if ( is_slice )
{
if ( ! IsString(op1->Type()->Tag()) )
ExprError("slice notation indexing only supported for strings currently");
if ( ! IsString(op1->Type()->Tag()) && ! IsVector(op1->Type()->Tag()) )
ExprError("slice notation indexing only supported for strings and vectors currently");
}
else if ( IsString(op1->Type()->Tag()) )
@ -2937,8 +2937,7 @@ IndexExpr::IndexExpr(Expr* arg_op1, ListExpr* arg_op2, bool is_slice)
else if ( ! op1->Type()->YieldType() )
{
if ( IsString(op1->Type()->Tag()) &&
match_type == MATCHES_INDEX_SCALAR )
if ( IsString(op1->Type()->Tag()) && match_type == MATCHES_INDEX_SCALAR )
SetType(base_type(TYPE_STRING));
else
// It's a set - so indexing it yields void. We don't
@ -3104,7 +3103,33 @@ Val* IndexExpr::Fold(Val* v1, Val* v2) const
switch ( v1->Type()->Tag() ) {
case TYPE_VECTOR:
v = v1->AsVectorVal()->Lookup(v2);
{
VectorVal* vect = v1->AsVectorVal();
const ListVal* lv = v2->AsListVal();
if ( lv->Length() == 1 )
v = vect->Lookup(v2);
else
{
int len = vect->Size();
VectorVal* result = nullptr;
bro_int_t first = get_slice_index(lv->Index(0)->CoerceToInt(), len);
bro_int_t last = get_slice_index(lv->Index(1)->CoerceToInt(), len);
int sub_length = last - first;
if ( sub_length >= 0 )
{
result = new VectorVal(vect->Type()->AsVectorType());
result->Resize(sub_length);
for ( int idx = first; idx < last; idx++ )
result->Assign(idx - first, vect->Lookup(idx)->Ref());
}
return result;
}
}
break;
case TYPE_TABLE: