controls.h

/*
Copyright 2013-present Barefoot Networks, Inc.
 
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.
*/
 
#ifndef BACKENDS_GRAPHS_CONTROLS_H_
#define BACKENDS_GRAPHS_CONTROLS_H_
 
#include "graphs.h"
 
namespace P4::graphs {
 
class ControlGraphs : public Graphs {
 public:
    class ControlStack {
     public:
        Graph *pushBack(Graph &currentSubgraph, const cstring &name);
        Graph *popBack();
        Graph *getSubgraph() const;
        cstring getName(const cstring &name) const;
        bool isEmpty() const;
 
     private:
        std::vector<cstring> names{};
        std::vector<Graph *> subgraphs{};
    };
 
    ControlGraphs(P4::ReferenceMap *refMap, P4::TypeMap *typeMap, std::filesystem::path graphsDir);
 
    bool preorder(const IR::PackageBlock *block) override;
    bool preorder(const IR::ControlBlock *block) override;
    bool preorder(const IR::P4Control *cont) override;
    bool preorder(const IR::BlockStatement *statement) override;
    bool preorder(const IR::IfStatement *statement) override;
    bool preorder(const IR::SwitchStatement *statement) override;
    bool preorder(const IR::MethodCallStatement *statement) override;
    bool preorder(const IR::AssignmentStatement *statement) override;
    bool preorder(const IR::ReturnStatement *) override;
    bool preorder(const IR::ExitStatement *) override;
    bool preorder(const IR::P4Table *table) override;
    bool preorder(const IR::Key *key) override;
    bool preorder(const IR::P4Action *action) override;
 
    std::vector<Graph *> controlGraphsArray{};
 
 private:
    P4::ReferenceMap *refMap;
    P4::TypeMap *typeMap;
    const cstring graphsDir;
    Parents return_parents{};
    ControlStack controlStack{};
    std::optional<cstring> instanceName{};
};
 
}  // namespace P4::graphs
 
#endif /* BACKENDS_GRAPHS_CONTROLS_H_ */