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33 // Copyright (c) 2008 Roberto Raggi <roberto.raggi@gmail.com>
35 // Permission is hereby granted, free of charge, to any person obtaining a copy
36 // of this software and associated documentation files (the "Software"), to deal
37 // in the Software without restriction, including without limitation the rights
38 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
39 // copies of the Software, and to permit persons to whom the Software is
40 // furnished to do so, subject to the following conditions:
42 // The above copyright notice and this permission notice shall be included in
43 // all copies or substantial portions of the Software.
45 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
46 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
47 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
48 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
49 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
50 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
53 #ifndef CPLUSPLUS_LITERALTABLE_H
54 #define CPLUSPLUS_LITERALTABLE_H
56 #include "CPlusPlusForwardDeclarations.h"
61 template <typename _Literal>
64 LiteralTable(const LiteralTable &other);
65 void operator =(const LiteralTable &other);
68 typedef _Literal *const *iterator;
74 _allocatedLiterals(0),
87 _Literal **lastLiteral = _literals + _literalCount + 1;
88 for (_Literal **it = _literals; it != lastLiteral; ++it)
97 _allocatedLiterals = 0;
99 _allocatedBuckets = 0;
103 { return _literalCount == -1; }
105 unsigned size() const
106 { return _literalCount + 1; }
108 const _Literal *at(unsigned index) const
109 { return _literals[index]; }
111 iterator begin() const
112 { return _literals; }
115 { return _literals + _literalCount + 1; }
117 const _Literal *findLiteral(const char *chars, unsigned size) const
120 unsigned h = _Literal::hashCode(chars, size);
121 _Literal *literal = _buckets[h % _allocatedBuckets];
122 for (; literal; literal = static_cast<_Literal *>(literal->_next)) {
123 if (literal->size() == size && ! std::strncmp(literal->chars(), chars, size))
131 const _Literal *findOrInsertLiteral(const char *chars, unsigned size)
134 unsigned h = _Literal::hashCode(chars, size);
135 _Literal *literal = _buckets[h % _allocatedBuckets];
136 for (; literal; literal = static_cast<_Literal *>(literal->_next)) {
137 if (literal->size() == size && ! std::strncmp(literal->chars(), chars, size))
142 _Literal *literal = new _Literal(chars, size);
144 if (++_literalCount == _allocatedLiterals) {
145 if (! _allocatedLiterals)
146 _allocatedLiterals = 4;
148 _allocatedLiterals <<= 1;
150 _literals = (_Literal **) std::realloc(_literals, sizeof(_Literal *) * _allocatedLiterals);
153 _literals[_literalCount] = literal;
155 if (! _buckets || _literalCount * 5 >= _allocatedBuckets * 3)
158 unsigned h = literal->hashCode() % _allocatedBuckets;
159 literal->_next = _buckets[h];
160 _buckets[h] = literal;
172 if (! _allocatedBuckets)
173 _allocatedBuckets = 4;
175 _allocatedBuckets <<= 1;
177 _buckets = (_Literal **) std::calloc(_allocatedBuckets, sizeof(_Literal *));
179 _Literal **lastLiteral = _literals + (_literalCount + 1);
181 for (_Literal **it = _literals; it != lastLiteral; ++it) {
182 _Literal *literal = *it;
183 unsigned h = literal->hashCode() % _allocatedBuckets;
185 literal->_next = _buckets[h];
186 _buckets[h] = literal;
191 _Literal **_literals;
193 int _allocatedLiterals;
195 int _allocatedBuckets;
198 } // namespace CPlusPlus
201 #endif // CPLUSPLUS_LITERALTABLE_H