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| 1 // Copyright 2010 the V8 project authors. All rights reserved. | 1 // Copyright 2010 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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| 5231 bool String::IsTwoByteEqualTo(Vector<const uc16> str) { | 5231 bool String::IsTwoByteEqualTo(Vector<const uc16> str) { |
| 5232 int slen = length(); | 5232 int slen = length(); |
| 5233 if (str.length() != slen) return false; | 5233 if (str.length() != slen) return false; |
| 5234 for (int i = 0; i < slen; i++) { | 5234 for (int i = 0; i < slen; i++) { |
| 5235 if (Get(i) != str[i]) return false; | 5235 if (Get(i) != str[i]) return false; |
| 5236 } | 5236 } |
| 5237 return true; | 5237 return true; |
| 5238 } | 5238 } |
| 5239 | 5239 |
| 5240 | 5240 |
| 5241 template <typename schar> | |
| 5242 static inline uint32_t HashSequentialString(const schar* chars, int length) { | |
| 5243 StringHasher hasher(length); | |
| 5244 if (!hasher.has_trivial_hash()) { | |
| 5245 int i; | |
| 5246 for (i = 0; hasher.is_array_index() && (i < length); i++) { | |
| 5247 hasher.AddCharacter(chars[i]); | |
| 5248 } | |
| 5249 for (; i < length; i++) { | |
| 5250 hasher.AddCharacterNoIndex(chars[i]); | |
| 5251 } | |
| 5252 } | |
| 5253 return hasher.GetHashField(); | |
| 5254 } | |
| 5255 | |
| 5256 | |
| 5257 uint32_t String::ComputeAndSetHash() { | 5241 uint32_t String::ComputeAndSetHash() { |
| 5258 // Should only be called if hash code has not yet been computed. | 5242 // Should only be called if hash code has not yet been computed. |
| 5259 ASSERT(!HasHashCode()); | 5243 ASSERT(!HasHashCode()); |
| 5260 | 5244 |
| 5261 const int len = length(); | 5245 const int len = length(); |
| 5262 | 5246 |
| 5263 // Compute the hash code. | 5247 // Compute the hash code. |
| 5264 uint32_t field = 0; | 5248 uint32_t field = 0; |
| 5265 if (StringShape(this).IsSequentialAscii()) { | 5249 if (StringShape(this).IsSequentialAscii()) { |
| 5266 field = HashSequentialString(SeqAsciiString::cast(this)->GetChars(), len); | 5250 field = HashSequentialString(SeqAsciiString::cast(this)->GetChars(), len); |
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| 10058 if (break_point_objects()->IsUndefined()) return 0; | 10042 if (break_point_objects()->IsUndefined()) return 0; |
| 10059 // Single beak point. | 10043 // Single beak point. |
| 10060 if (!break_point_objects()->IsFixedArray()) return 1; | 10044 if (!break_point_objects()->IsFixedArray()) return 1; |
| 10061 // Multiple break points. | 10045 // Multiple break points. |
| 10062 return FixedArray::cast(break_point_objects())->length(); | 10046 return FixedArray::cast(break_point_objects())->length(); |
| 10063 } | 10047 } |
| 10064 #endif | 10048 #endif |
| 10065 | 10049 |
| 10066 | 10050 |
| 10067 } } // namespace v8::internal | 10051 } } // namespace v8::internal |
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