/*
- * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
+ * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2012 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
#include "Identifier.h"
#include "CallFrame.h"
+#include "JSObject.h"
+#include "JSScope.h"
#include "NumericStrings.h"
-#include <new> // for placement new
-#include <string.h> // for strlen
+#include "JSCInlines.h"
+#include <new>
+#include <string.h>
#include <wtf/Assertions.h>
#include <wtf/FastMalloc.h>
#include <wtf/HashSet.h>
-#include <wtf/WTFThreadData.h>
+#include <wtf/text/ASCIIFastPath.h>
#include <wtf/text/StringHash.h>
using WTF::ThreadSpecific;
namespace JSC {
-IdentifierTable::~IdentifierTable()
+Ref<StringImpl> Identifier::add(VM* vm, const char* c)
{
- HashSet<StringImpl*>::iterator end = m_table.end();
- for (HashSet<StringImpl*>::iterator iter = m_table.begin(); iter != end; ++iter)
- (*iter)->setIsIdentifier(false);
-}
-std::pair<HashSet<StringImpl*>::iterator, bool> IdentifierTable::add(StringImpl* value)
-{
- std::pair<HashSet<StringImpl*>::iterator, bool> result = m_table.add(value);
- (*result.first)->setIsIdentifier(true);
- return result;
-}
-template<typename U, typename V>
-std::pair<HashSet<StringImpl*>::iterator, bool> IdentifierTable::add(U value)
-{
- std::pair<HashSet<StringImpl*>::iterator, bool> result = m_table.add<U, V>(value);
- (*result.first)->setIsIdentifier(true);
- return result;
-}
-
-IdentifierTable* createIdentifierTable()
-{
- return new IdentifierTable;
-}
-
-void deleteIdentifierTable(IdentifierTable* table)
-{
- delete table;
-}
-
-bool Identifier::equal(const UString::Rep* r, const char* s)
-{
- int length = r->length();
- const UChar* d = r->characters();
- 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, unsigned length)
-{
- if (r->length() != length)
- return false;
- const UChar* d = r->characters();
- for (unsigned i = 0; i != length; ++i)
- if (d[i] != s[i])
- return false;
- return true;
-}
-
-struct IdentifierCStringTranslator {
- 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)
- return UString::null().rep();
- if (!c[0])
- return UString::Rep::empty();
+ ASSERT(c);
+ ASSERT(c[0]);
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*, IdentifierCStringTranslator>(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;
+ return *vm->smallStrings.singleCharacterStringRep(c[0]);
- literalIdentifierTable.add(c, addedString.get());
-
- return addedString.release();
+ return *AtomicStringImpl::add(c);
}
-PassRefPtr<UString::Rep> Identifier::add(ExecState* exec, const char* c)
+Ref<StringImpl> Identifier::add(ExecState* exec, const char* c)
{
- return add(&exec->globalData(), c);
+ return add(&exec->vm(), c);
}
-struct UCharBuffer {
- const UChar* s;
- unsigned int length;
-};
-
-struct IdentifierUCharBufferTranslator {
- 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)
+Ref<StringImpl> Identifier::add8(VM* vm, const UChar* s, int length)
{
if (length == 1) {
UChar c = s[0];
- if (c <= 0xFF)
- return add(globalData, globalData->smallStrings.singleCharacterStringRep(c));
+ ASSERT(c <= 0xff);
+ if (canUseSingleCharacterString(c))
+ return *vm->smallStrings.singleCharacterStringRep(c);
}
if (!length)
- return UString::Rep::empty();
- UCharBuffer buf = {s, length};
- pair<HashSet<UString::Rep*>::iterator, bool> addResult = globalData->identifierTable->add<UCharBuffer, IdentifierUCharBufferTranslator>(buf);
+ return *StringImpl::empty();
- // 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;
+ return *AtomicStringImpl::add(s, length);
}
-PassRefPtr<UString::Rep> Identifier::add(ExecState* exec, const UChar* s, int length)
+Identifier Identifier::from(ExecState* exec, unsigned value)
{
- return add(&exec->globalData(), s, length);
+ return Identifier(exec, exec->vm().numericStrings.add(value));
}
-PassRefPtr<UString::Rep> Identifier::addSlowCase(JSGlobalData* globalData, UString::Rep* r)
+Identifier Identifier::from(ExecState* exec, int value)
{
- ASSERT(!r->isIdentifier());
- // The empty & null strings are static singletons, and static strings are handled
- // in ::add() in the header, so we should never get here with a zero length string.
- ASSERT(r->length());
-
- if (r->length() == 1) {
- UChar c = r->characters()[0];
- if (c <= 0xFF)
- r = globalData->smallStrings.singleCharacterStringRep(c);
- if (r->isIdentifier())
- return r;
- }
+ return Identifier(exec, exec->vm().numericStrings.add(value));
+}
- return *globalData->identifierTable->add(r).first;
+Identifier Identifier::from(ExecState* exec, double value)
+{
+ return Identifier(exec, exec->vm().numericStrings.add(value));
}
-PassRefPtr<UString::Rep> Identifier::addSlowCase(ExecState* exec, UString::Rep* r)
+Identifier Identifier::from(VM* vm, unsigned value)
{
- return addSlowCase(&exec->globalData(), r);
+ return Identifier(vm, vm->numericStrings.add(value));
}
-Identifier Identifier::from(ExecState* exec, unsigned value)
+Identifier Identifier::from(VM* vm, int value)
{
- return Identifier(exec, exec->globalData().numericStrings.add(value));
+ return Identifier(vm, vm->numericStrings.add(value));
}
-Identifier Identifier::from(ExecState* exec, int value)
+Identifier Identifier::from(VM* vm, double value)
{
- return Identifier(exec, exec->globalData().numericStrings.add(value));
+ return Identifier(vm, vm->numericStrings.add(value));
}
-Identifier Identifier::from(ExecState* exec, double value)
+void Identifier::dump(PrintStream& out) const
{
- return Identifier(exec, exec->globalData().numericStrings.add(value));
+ if (impl())
+ out.print(impl());
+ else
+ out.print("<null identifier>");
}
#ifndef NDEBUG
-void Identifier::checkCurrentIdentifierTable(JSGlobalData* globalData)
+void Identifier::checkCurrentAtomicStringTable(VM* vm)
{
// Check the identifier table accessible through the threadspecific matches the
- // globalData's identifier table.
- ASSERT_UNUSED(globalData, globalData->identifierTable == wtfThreadData().currentIdentifierTable());
+ // vm's identifier table.
+ ASSERT_UNUSED(vm, vm->atomicStringTable() == wtfThreadData().atomicStringTable());
}
-void Identifier::checkCurrentIdentifierTable(ExecState* exec)
+void Identifier::checkCurrentAtomicStringTable(ExecState* exec)
{
- checkCurrentIdentifierTable(&exec->globalData());
+ checkCurrentAtomicStringTable(&exec->vm());
}
#else
// These only exists so that our exports are the same for debug and release builds.
-// This would be an ASSERT_NOT_REACHED(), but we're in NDEBUG only code here!
-void Identifier::checkCurrentIdentifierTable(JSGlobalData*) { CRASH(); }
-void Identifier::checkCurrentIdentifierTable(ExecState*) { CRASH(); }
+// This would be an RELEASE_ASSERT_NOT_REACHED(), but we're in NDEBUG only code here!
+NO_RETURN_DUE_TO_CRASH void Identifier::checkCurrentAtomicStringTable(VM*) { CRASH(); }
+NO_RETURN_DUE_TO_CRASH void Identifier::checkCurrentAtomicStringTable(ExecState*) { CRASH(); }
#endif
projects / apple / javascriptcore.git / blobdiff