1 // Copyright 2012 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/ast/modules.h" 6 7 #include "src/ast/ast-value-factory.h" 8 9 namespace v8 { 10 namespace internal { 11 12 13 void ModuleDescriptor::AddLocalExport(const AstRawString* export_name, 14 const AstRawString* local_name, 15 Zone* zone, bool* ok) { 16 void* key = const_cast<AstRawString*>(export_name); 17 18 ZoneAllocationPolicy allocator(zone); 19 20 if (exports_ == nullptr) { 21 exports_ = new (zone->New(sizeof(ZoneHashMap))) 22 ZoneHashMap(ZoneHashMap::PointersMatch, 23 ZoneHashMap::kDefaultHashMapCapacity, allocator); 24 } 25 26 ZoneHashMap::Entry* p = 27 exports_->LookupOrInsert(key, export_name->hash(), allocator); 28 DCHECK_NOT_NULL(p); 29 if (p->value != nullptr) { 30 // Duplicate export. 31 *ok = false; 32 return; 33 } 34 35 p->value = const_cast<AstRawString*>(local_name); 36 } 37 38 39 void ModuleDescriptor::AddModuleRequest(const AstRawString* module_specifier, 40 Zone* zone) { 41 // TODO(adamk): Avoid this O(N) operation on each insert by storing 42 // a HashMap, or by de-duping after parsing. 43 if (requested_modules_.Contains(module_specifier)) return; 44 requested_modules_.Add(module_specifier, zone); 45 } 46 47 48 const AstRawString* ModuleDescriptor::LookupLocalExport( 49 const AstRawString* export_name, Zone* zone) { 50 if (exports_ == nullptr) return nullptr; 51 ZoneHashMap::Entry* entry = exports_->Lookup( 52 const_cast<AstRawString*>(export_name), export_name->hash()); 53 if (entry == nullptr) return nullptr; 54 DCHECK_NOT_NULL(entry->value); 55 return static_cast<const AstRawString*>(entry->value); 56 } 57 } // namespace internal 58 } // namespace v8 59
