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/*
* Copyright 2016 WebAssembly Community Group participants
*
* 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 WABT_BINDING_HASH_H_
#define WABT_BINDING_HASH_H_
#include <string>
#include <vector>
#include <unordered_map>
#include "common.h"
namespace wabt {
struct Binding {
explicit Binding(int index) : index(index) {
WABT_ZERO_MEMORY(loc);
}
Binding(const Location& loc, int index) : loc(loc), index(index) {}
Location loc;
int index;
};
// This class derives from a C++ container, which is usually not advisable
// because they don't have virtual destructors. So don't delete a BindingHash
// object through a pointer to std::unordered_multimap.
class BindingHash : public std::unordered_multimap<std::string, Binding> {
public:
typedef void (*DuplicateCallback)(const value_type& a,
const value_type& b,
void* user_data);
void find_duplicates(DuplicateCallback callback, void* user_data) const;
int find_index(const StringSlice& name) const {
auto iter = find(string_slice_to_string(name));
if (iter != end())
return iter->second.index;
return -1;
}
private:
typedef std::vector<const value_type*> ValueTypeVector;
void create_duplicates_vector(ValueTypeVector* out_duplicates) const;
void sort_duplicates_vector_by_location(ValueTypeVector* duplicates) const;
void call_callbacks(const ValueTypeVector& duplicates,
DuplicateCallback callback,
void* user_data) const;
};
} // namespace wabt
#endif /* WABT_BINDING_HASH_H_ */
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