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 DCHECK(!IsFrozen()); 17 void* key = const_cast<AstRawString*>(export_name); 18 19 ZoneAllocationPolicy allocator(zone); 20 21 if (exports_ == nullptr) { 22 exports_ = new (zone->New(sizeof(ZoneHashMap))) 23 ZoneHashMap(ZoneHashMap::PointersMatch, 24 ZoneHashMap::kDefaultHashMapCapacity, allocator); 25 } 26 27 ZoneHashMap::Entry* p = 28 exports_->LookupOrInsert(key, export_name->hash(), allocator); 29 DCHECK_NOT_NULL(p); 30 if (p->value != nullptr) { 31 // Duplicate export. 32 *ok = false; 33 return; 34 } 35 36 p->value = const_cast<AstRawString*>(local_name); 37 } 38 39 40 void ModuleDescriptor::AddModuleRequest(const AstRawString* module_specifier, 41 Zone* zone) { 42 // TODO(adamk): Avoid this O(N) operation on each insert by storing 43 // a HashMap, or by de-duping after parsing. 44 if (requested_modules_.Contains(module_specifier)) return; 45 requested_modules_.Add(module_specifier, zone); 46 } 47 48 49 const AstRawString* ModuleDescriptor::LookupLocalExport( 50 const AstRawString* export_name, Zone* zone) { 51 if (exports_ == nullptr) return nullptr; 52 ZoneHashMap::Entry* entry = exports_->Lookup( 53 const_cast<AstRawString*>(export_name), export_name->hash()); 54 if (entry == nullptr) return nullptr; 55 DCHECK_NOT_NULL(entry->value); 56 return static_cast<const AstRawString*>(entry->value); 57 } 58 } // namespace internal 59 } // namespace v8 60
