Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 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) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 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 |