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      1 // Copyright 2016 the V8 project authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "src/wasm/signature-map.h"
      6 
      7 namespace v8 {
      8 namespace internal {
      9 namespace wasm {
     10 
     11 uint32_t SignatureMap::FindOrInsert(FunctionSig* sig) {
     12   auto pos = map_.find(sig);
     13   if (pos != map_.end()) {
     14     return pos->second;
     15   } else {
     16     uint32_t index = next_++;
     17     map_[sig] = index;
     18     return index;
     19   }
     20 }
     21 
     22 int32_t SignatureMap::Find(FunctionSig* sig) const {
     23   auto pos = map_.find(sig);
     24   if (pos != map_.end()) {
     25     return static_cast<int32_t>(pos->second);
     26   } else {
     27     return -1;
     28   }
     29 }
     30 
     31 bool SignatureMap::CompareFunctionSigs::operator()(FunctionSig* a,
     32                                                    FunctionSig* b) const {
     33   if (a == b) return false;
     34   if (a->return_count() < b->return_count()) return true;
     35   if (a->return_count() > b->return_count()) return false;
     36   if (a->parameter_count() < b->parameter_count()) return true;
     37   if (a->parameter_count() > b->parameter_count()) return false;
     38   for (size_t r = 0; r < a->return_count(); r++) {
     39     if (a->GetReturn(r) < b->GetReturn(r)) return true;
     40     if (a->GetReturn(r) > b->GetReturn(r)) return false;
     41   }
     42   for (size_t p = 0; p < a->parameter_count(); p++) {
     43     if (a->GetParam(p) < b->GetParam(p)) return true;
     44     if (a->GetParam(p) > b->GetParam(p)) return false;
     45   }
     46   return false;
     47 }
     48 
     49 }  // namespace wasm
     50 }  // namespace internal
     51 }  // namespace v8
     52