// Copyright 2025 The Inspektor Gadget authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package libpcap_compiler

import (
	"github.com/packetcap/go-pcap/filter"
	"golang.org/x/net/bpf"
)

// CompileCbpf compiles a libpcap expression into cbpf instructions
func CompileCbpf(expr string) ([]bpf.Instruction, error) {
	if len(expr) == 0 {
		return nil, nil
	}

	x := filter.NewExpression(expr)
	f := x.Compile()
	return f.Compile()
}
