third_party/v8/src/wasm/signature-map.cc

// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "src/wasm/signature-map.h"

#include "src/codegen/signature.h"

namespace v8 {
namespace internal {
namespace wasm {

uint32_t SignatureMap::FindOrInsert(const FunctionSig& sig) {
  CHECK(!frozen_);
  auto pos = map_.find(sig);
  if (pos != map_.end()) return pos->second;
  // Indexes are returned as int32_t, thus check against their limit.
  CHECK_GE(kMaxInt, map_.size());
  uint32_t index = static_cast<uint32_t>(map_.size());
  map_.insert(std::make_pair(sig, index));
  return index;
}

int32_t SignatureMap::Find(const FunctionSig& sig) const {
  auto pos = map_.find(sig);
  if (pos == map_.end()) return -1;
  return static_cast<int32_t>(pos->second);
}

}  // namespace wasm
}  // namespace internal
}  // namespace v8