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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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12857 return Shrink(key); | 12857 return Shrink(key); |
12858 } | 12858 } |
12859 | 12859 |
12860 | 12860 |
12861 Object* ObjectHashTable::Lookup(Object* key) { | 12861 Object* ObjectHashTable::Lookup(Object* key) { |
12862 ASSERT(IsKey(key)); | 12862 ASSERT(IsKey(key)); |
12863 | 12863 |
12864 // If the object does not have an identity hash, it was never used as a key. | 12864 // If the object does not have an identity hash, it was never used as a key. |
12865 { MaybeObject* maybe_hash = key->GetHash(OMIT_CREATION); | 12865 { MaybeObject* maybe_hash = key->GetHash(OMIT_CREATION); |
12866 if (maybe_hash->ToObjectUnchecked()->IsUndefined()) { | 12866 if (maybe_hash->ToObjectUnchecked()->IsUndefined()) { |
12867 return GetHeap()->undefined_value(); | 12867 return GetHeap()->the_hole_value(); |
12868 } | 12868 } |
12869 } | 12869 } |
12870 int entry = FindEntry(key); | 12870 int entry = FindEntry(key); |
12871 if (entry == kNotFound) return GetHeap()->undefined_value(); | 12871 if (entry == kNotFound) return GetHeap()->the_hole_value(); |
12872 return get(EntryToIndex(entry) + 1); | 12872 return get(EntryToIndex(entry) + 1); |
12873 } | 12873 } |
12874 | 12874 |
12875 | 12875 |
12876 MaybeObject* ObjectHashTable::Put(Object* key, Object* value) { | 12876 MaybeObject* ObjectHashTable::Put(Object* key, Object* value) { |
12877 ASSERT(IsKey(key)); | 12877 ASSERT(IsKey(key)); |
12878 | 12878 |
12879 // Make sure the key object has an identity hash code. | 12879 // Make sure the key object has an identity hash code. |
12880 int hash; | 12880 int hash; |
12881 { MaybeObject* maybe_hash = key->GetHash(ALLOW_CREATION); | 12881 { MaybeObject* maybe_hash = key->GetHash(ALLOW_CREATION); |
12882 if (maybe_hash->IsFailure()) return maybe_hash; | 12882 if (maybe_hash->IsFailure()) return maybe_hash; |
12883 hash = Smi::cast(maybe_hash->ToObjectUnchecked())->value(); | 12883 hash = Smi::cast(maybe_hash->ToObjectUnchecked())->value(); |
12884 } | 12884 } |
12885 int entry = FindEntry(key); | 12885 int entry = FindEntry(key); |
12886 | 12886 |
12887 // Check whether to perform removal operation. | 12887 // Check whether to perform removal operation. |
12888 if (value->IsUndefined()) { | 12888 if (value->IsTheHole()) { |
12889 if (entry == kNotFound) return this; | 12889 if (entry == kNotFound) return this; |
12890 RemoveEntry(entry); | 12890 RemoveEntry(entry); |
12891 return Shrink(key); | 12891 return Shrink(key); |
12892 } | 12892 } |
12893 | 12893 |
12894 // Key is already in table, just overwrite value. | 12894 // Key is already in table, just overwrite value. |
12895 if (entry != kNotFound) { | 12895 if (entry != kNotFound) { |
12896 set(EntryToIndex(entry) + 1, value); | 12896 set(EntryToIndex(entry) + 1, value); |
12897 return this; | 12897 return this; |
12898 } | 12898 } |
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13298 set_year(Smi::FromInt(year), SKIP_WRITE_BARRIER); | 13298 set_year(Smi::FromInt(year), SKIP_WRITE_BARRIER); |
13299 set_month(Smi::FromInt(month), SKIP_WRITE_BARRIER); | 13299 set_month(Smi::FromInt(month), SKIP_WRITE_BARRIER); |
13300 set_day(Smi::FromInt(day), SKIP_WRITE_BARRIER); | 13300 set_day(Smi::FromInt(day), SKIP_WRITE_BARRIER); |
13301 set_weekday(Smi::FromInt(weekday), SKIP_WRITE_BARRIER); | 13301 set_weekday(Smi::FromInt(weekday), SKIP_WRITE_BARRIER); |
13302 set_hour(Smi::FromInt(hour), SKIP_WRITE_BARRIER); | 13302 set_hour(Smi::FromInt(hour), SKIP_WRITE_BARRIER); |
13303 set_min(Smi::FromInt(min), SKIP_WRITE_BARRIER); | 13303 set_min(Smi::FromInt(min), SKIP_WRITE_BARRIER); |
13304 set_sec(Smi::FromInt(sec), SKIP_WRITE_BARRIER); | 13304 set_sec(Smi::FromInt(sec), SKIP_WRITE_BARRIER); |
13305 } | 13305 } |
13306 | 13306 |
13307 } } // namespace v8::internal | 13307 } } // namespace v8::internal |
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