diff options
author | hjk <[email protected]> | 2009-01-26 16:19:24 +0100 |
---|---|---|
committer | hjk <[email protected]> | 2009-01-26 16:19:24 +0100 |
commit | fe0533de2a634ca377c2d8a0073e0eb2cbf89abf (patch) | |
tree | 29d3d30e6cc5a1068a94097a5660bc4d133a205f /src/shared/cplusplus/LiteralTable.h | |
parent | c85ba53365d606192069a841ed806979f17d80bc (diff) |
Fixes: move all files in shared/* to src/shared/*
Diffstat (limited to 'src/shared/cplusplus/LiteralTable.h')
-rw-r--r-- | src/shared/cplusplus/LiteralTable.h | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/src/shared/cplusplus/LiteralTable.h b/src/shared/cplusplus/LiteralTable.h new file mode 100644 index 00000000000..35744fe3601 --- /dev/null +++ b/src/shared/cplusplus/LiteralTable.h @@ -0,0 +1,181 @@ +/*************************************************************************** +** +** This file is part of Qt Creator +** +** Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). +** +** Contact: Qt Software Information ([email protected]) +** +** +** Non-Open Source Usage +** +** Licensees may use this file in accordance with the Qt Beta Version +** License Agreement, Agreement version 2.2 provided with the Software or, +** alternatively, in accordance with the terms contained in a written +** agreement between you and Nokia. +** +** GNU General Public License Usage +** +** Alternatively, this file may be used under the terms of the GNU General +** Public License versions 2.0 or 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the packaging +** of this file. Please review the following information to ensure GNU +** General Public Licensing requirements will be met: +** +** http://www.fsf.org/licensing/licenses/info/GPLv2.html and +** http://www.gnu.org/copyleft/gpl.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt GPL Exception +** version 1.3, included in the file GPL_EXCEPTION.txt in this package. +** +***************************************************************************/ +// Copyright (c) 2008 Roberto Raggi <[email protected]> +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. + +#ifndef CPLUSPLUS_LITERALTABLE_H +#define CPLUSPLUS_LITERALTABLE_H + +#include "CPlusPlusForwardDeclarations.h" +#include <cstring> +#include <cstdlib> + +CPLUSPLUS_BEGIN_HEADER +CPLUSPLUS_BEGIN_NAMESPACE + +template <typename _Literal> +class LiteralTable +{ + LiteralTable(const LiteralTable &other); + void operator =(const LiteralTable &other); + +public: + typedef _Literal **iterator; + +public: + LiteralTable() + : _literals(0), + _allocatedLiterals(0), + _literalCount(-1), + _buckets(0), + _allocatedBuckets(0) + { } + + ~LiteralTable() + { + if (_literals) { + _Literal **lastLiteral = _literals + _literalCount + 1; + for (_Literal **it = _literals; it != lastLiteral; ++it) + delete *it; + free(_literals); + } + if (_buckets) + free(_buckets); + } + + bool empty() const + { return _literalCount == -1; } + + unsigned size() const + { return _literalCount + 1; } + + _Literal *at(unsigned index) const + { return _literals[index]; } + + iterator begin() const + { return _literals; } + + iterator end() const + { return _literals + _literalCount + 1; } + + _Literal *findOrInsertLiteral(const char *chars, unsigned size) + { + if (_buckets) { + unsigned h = _Literal::hashCode(chars, size); + _Literal *literal = _buckets[h % _allocatedBuckets]; + for (; literal; literal = static_cast<_Literal *>(literal->_next)) { + if (literal->size() == size && ! strncmp(literal->chars(), chars, size)) + return literal; + } + } + + _Literal *literal = new _Literal(chars, size); + + if (++_literalCount == _allocatedLiterals) { + _allocatedLiterals <<= 1; + + if (! _allocatedLiterals) + _allocatedLiterals = 256; + + _literals = (_Literal **) realloc(_literals, sizeof(_Literal *) * _allocatedLiterals); + } + + _literals[_literalCount] = literal; + + if (! _buckets || _literalCount >= _allocatedBuckets * .6) + rehash(); + else { + unsigned h = literal->hashCode() % _allocatedBuckets; + literal->_next = _buckets[h]; + _buckets[h] = literal; + } + + return literal; + } + +protected: + void rehash() + { + if (_buckets) + free(_buckets); + + _allocatedBuckets <<= 1; + + if (! _allocatedBuckets) + _allocatedBuckets = 256; + + _buckets = (_Literal **) calloc(_allocatedBuckets, sizeof(_Literal *)); + + _Literal **lastLiteral = _literals + (_literalCount + 1); + + for (_Literal **it = _literals; it != lastLiteral; ++it) { + _Literal *literal = *it; + unsigned h = literal->hashCode() % _allocatedBuckets; + + literal->_next = _buckets[h]; + _buckets[h] = literal; + } + } + +protected: + MemoryPool *_pool; + + _Literal **_literals; + int _allocatedLiterals; + int _literalCount; + + _Literal **_buckets; + int _allocatedBuckets; +}; + +CPLUSPLUS_END_NAMESPACE +CPLUSPLUS_END_HEADER + +#endif // CPLUSPLUS_LITERALTABLE_H |