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Diffstat (limited to 'src/3rdparty/javascriptcore/JavaScriptCore/runtime/Identifier.cpp')
| -rw-r--r-- | src/3rdparty/javascriptcore/JavaScriptCore/runtime/Identifier.cpp | 292 |
1 files changed, 0 insertions, 292 deletions
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Identifier.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Identifier.cpp deleted file mode 100644 index 747c4ac..0000000 --- a/src/3rdparty/javascriptcore/JavaScriptCore/runtime/Identifier.cpp +++ /dev/null @@ -1,292 +0,0 @@ -/* - * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public License - * along with this library; see the file COPYING.LIB. If not, write to - * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, - * Boston, MA 02110-1301, USA. - * - */ - -#include "config.h" -#include "Identifier.h" - -#include "CallFrame.h" -#include <new> // for placement new -#include <string.h> // for strlen -#include <wtf/Assertions.h> -#include <wtf/FastMalloc.h> -#include <wtf/HashSet.h> - -using WTF::ThreadSpecific; - -namespace JSC { - -typedef HashMap<const char*, RefPtr<UString::Rep>, PtrHash<const char*> > LiteralIdentifierTable; - -class IdentifierTable : public FastAllocBase { -public: - ~IdentifierTable() - { - HashSet<UString::Rep*>::iterator end = m_table.end(); - for (HashSet<UString::Rep*>::iterator iter = m_table.begin(); iter != end; ++iter) - (*iter)->setIsIdentifier(false); - } - - std::pair<HashSet<UString::Rep*>::iterator, bool> add(UString::Rep* value) - { - std::pair<HashSet<UString::Rep*>::iterator, bool> result = m_table.add(value); - (*result.first)->setIsIdentifier(true); - return result; - } - - template<typename U, typename V> - std::pair<HashSet<UString::Rep*>::iterator, bool> add(U value) - { - std::pair<HashSet<UString::Rep*>::iterator, bool> result = m_table.add<U, V>(value); - (*result.first)->setIsIdentifier(true); - return result; - } - - void remove(UString::Rep* r) { m_table.remove(r); } - - LiteralIdentifierTable& literalTable() { return m_literalTable; } - -private: - HashSet<UString::Rep*> m_table; - LiteralIdentifierTable m_literalTable; -}; - -IdentifierTable* createIdentifierTable() -{ - return new IdentifierTable; -} - -void deleteIdentifierTable(IdentifierTable* table) -{ - delete table; -} - -bool Identifier::equal(const UString::Rep* r, const char* s) -{ - int length = r->size(); - const UChar* d = r->data(); - for (int i = 0; i != length; ++i) - if (d[i] != (unsigned char)s[i]) - return false; - return s[length] == 0; -} - -bool Identifier::equal(const UString::Rep* r, const UChar* s, int length) -{ - if (r->size() != length) - return false; - const UChar* d = r->data(); - for (int i = 0; i != length; ++i) - if (d[i] != s[i]) - return false; - return true; -} - -struct CStringTranslator { - static unsigned hash(const char* c) - { - return UString::Rep::computeHash(c); - } - - static bool equal(UString::Rep* r, const char* s) - { - return Identifier::equal(r, s); - } - - static void translate(UString::Rep*& location, const char* c, unsigned hash) - { - size_t length = strlen(c); - UChar* d; - UString::Rep* r = UString::Rep::createUninitialized(length, d).releaseRef(); - for (size_t i = 0; i != length; i++) - d[i] = static_cast<unsigned char>(c[i]); // use unsigned char to zero-extend instead of sign-extend - r->setHash(hash); - location = r; - } -}; - -PassRefPtr<UString::Rep> Identifier::add(JSGlobalData* globalData, const char* c) -{ - if (!c) { - UString::Rep::null().hash(); - return &UString::Rep::null(); - } - if (!c[0]) { - UString::Rep::empty().hash(); - return &UString::Rep::empty(); - } - if (!c[1]) - return add(globalData, globalData->smallStrings.singleCharacterStringRep(static_cast<unsigned char>(c[0]))); - - IdentifierTable& identifierTable = *globalData->identifierTable; - LiteralIdentifierTable& literalIdentifierTable = identifierTable.literalTable(); - - const LiteralIdentifierTable::iterator& iter = literalIdentifierTable.find(c); - if (iter != literalIdentifierTable.end()) - return iter->second; - - pair<HashSet<UString::Rep*>::iterator, bool> addResult = identifierTable.add<const char*, CStringTranslator>(c); - - // If the string is newly-translated, then we need to adopt it. - // The boolean in the pair tells us if that is so. - RefPtr<UString::Rep> addedString = addResult.second ? adoptRef(*addResult.first) : *addResult.first; - - literalIdentifierTable.add(c, addedString.get()); - - return addedString.release(); -} - -PassRefPtr<UString::Rep> Identifier::add(ExecState* exec, const char* c) -{ - return add(&exec->globalData(), c); -} - -struct UCharBuffer { - const UChar* s; - unsigned int length; -}; - -struct UCharBufferTranslator { - static unsigned hash(const UCharBuffer& buf) - { - return UString::Rep::computeHash(buf.s, buf.length); - } - - static bool equal(UString::Rep* str, const UCharBuffer& buf) - { - return Identifier::equal(str, buf.s, buf.length); - } - - static void translate(UString::Rep*& location, const UCharBuffer& buf, unsigned hash) - { - UChar* d; - UString::Rep* r = UString::Rep::createUninitialized(buf.length, d).releaseRef(); - for (unsigned i = 0; i != buf.length; i++) - d[i] = buf.s[i]; - r->setHash(hash); - location = r; - } -}; - -PassRefPtr<UString::Rep> Identifier::add(JSGlobalData* globalData, const UChar* s, int length) -{ - if (length == 1) { - UChar c = s[0]; - if (c <= 0xFF) - return add(globalData, globalData->smallStrings.singleCharacterStringRep(c)); - } - if (!length) { - UString::Rep::empty().hash(); - return &UString::Rep::empty(); - } - UCharBuffer buf = {s, length}; - pair<HashSet<UString::Rep*>::iterator, bool> addResult = globalData->identifierTable->add<UCharBuffer, UCharBufferTranslator>(buf); - - // If the string is newly-translated, then we need to adopt it. - // The boolean in the pair tells us if that is so. - return addResult.second ? adoptRef(*addResult.first) : *addResult.first; -} - -PassRefPtr<UString::Rep> Identifier::add(ExecState* exec, const UChar* s, int length) -{ - return add(&exec->globalData(), s, length); -} - -PassRefPtr<UString::Rep> Identifier::addSlowCase(JSGlobalData* globalData, UString::Rep* r) -{ - ASSERT(!r->isIdentifier()); - if (r->size() == 1) { - UChar c = r->data()[0]; - if (c <= 0xFF) - r = globalData->smallStrings.singleCharacterStringRep(c); - if (r->isIdentifier()) { -#ifndef NDEBUG - checkSameIdentifierTable(globalData, r); -#endif - return r; - } - } - if (!r->size()) { - UString::Rep::empty().hash(); - return &UString::Rep::empty(); - } - return *globalData->identifierTable->add(r).first; -} - -PassRefPtr<UString::Rep> Identifier::addSlowCase(ExecState* exec, UString::Rep* r) -{ - return addSlowCase(&exec->globalData(), r); -} - -void Identifier::remove(UString::Rep* r) -{ - currentIdentifierTable()->remove(r); -} - -#ifndef NDEBUG - -void Identifier::checkSameIdentifierTable(ExecState* exec, UString::Rep*) -{ - ASSERT_UNUSED(exec, exec->globalData().identifierTable == currentIdentifierTable()); -} - -void Identifier::checkSameIdentifierTable(JSGlobalData* globalData, UString::Rep*) -{ - ASSERT_UNUSED(globalData, globalData->identifierTable == currentIdentifierTable()); -} - -#else - -void Identifier::checkSameIdentifierTable(ExecState*, UString::Rep*) -{ -} - -void Identifier::checkSameIdentifierTable(JSGlobalData*, UString::Rep*) -{ -} - -#endif - -ThreadSpecific<ThreadIdentifierTableData>* g_identifierTableSpecific = 0; - -#if ENABLE(JSC_MULTIPLE_THREADS) - -pthread_once_t createIdentifierTableSpecificOnce = PTHREAD_ONCE_INIT; -static void createIdentifierTableSpecificCallback() -{ - ASSERT(!g_identifierTableSpecific); - g_identifierTableSpecific = new ThreadSpecific<ThreadIdentifierTableData>(); -} -void createIdentifierTableSpecific() -{ - pthread_once(&createIdentifierTableSpecificOnce, createIdentifierTableSpecificCallback); - ASSERT(g_identifierTableSpecific); -} - -#else - -void createIdentifierTableSpecific() -{ - ASSERT(!g_identifierTableSpecific); - g_identifierTableSpecific = new ThreadSpecific<ThreadIdentifierTableData>(); -} - -#endif - -} // namespace JSC |