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Issue 9155010: Minor cleanups of numeric seeded hashing patch. (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: Created 8 years, 11 months ago
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1 // Copyright 2011 the V8 project authors. All rights reserved. 1 // Copyright 2011 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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4321 } 4321 }
4322 4322
4323 4323
4324 StringHasher::StringHasher(int length, uint32_t seed) 4324 StringHasher::StringHasher(int length, uint32_t seed)
4325 : length_(length), 4325 : length_(length),
4326 raw_running_hash_(seed), 4326 raw_running_hash_(seed),
4327 array_index_(0), 4327 array_index_(0),
4328 is_array_index_(0 < length_ && length_ <= String::kMaxArrayIndexSize), 4328 is_array_index_(0 < length_ && length_ <= String::kMaxArrayIndexSize),
4329 is_first_char_(true), 4329 is_first_char_(true),
4330 is_valid_(true) { 4330 is_valid_(true) {
4331 ASSERT(FLAG_randomize_string_hashes || raw_running_hash_ == 0); 4331 ASSERT(FLAG_randomize_hashes || raw_running_hash_ == 0);
4332 } 4332 }
4333 4333
4334 4334
4335 bool StringHasher::has_trivial_hash() { 4335 bool StringHasher::has_trivial_hash() {
4336 return length_ > String::kMaxHashCalcLength; 4336 return length_ > String::kMaxHashCalcLength;
4337 } 4337 }
4338 4338
4339 4339
4340 void StringHasher::AddCharacter(uc32 c) { 4340 void StringHasher::AddCharacter(uc32 c) {
4341 // Use the Jenkins one-at-a-time hash function to update the hash 4341 // Use the Jenkins one-at-a-time hash function to update the hash
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4782 #undef WRITE_INT_FIELD 4782 #undef WRITE_INT_FIELD
4783 #undef READ_SHORT_FIELD 4783 #undef READ_SHORT_FIELD
4784 #undef WRITE_SHORT_FIELD 4784 #undef WRITE_SHORT_FIELD
4785 #undef READ_BYTE_FIELD 4785 #undef READ_BYTE_FIELD
4786 #undef WRITE_BYTE_FIELD 4786 #undef WRITE_BYTE_FIELD
4787 4787
4788 4788
4789 } } // namespace v8::internal 4789 } } // namespace v8::internal
4790 4790
4791 #endif // V8_OBJECTS_INL_H_ 4791 #endif // V8_OBJECTS_INL_H_
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