/*
- * 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 "CallFrame.h"
#include "JSObject.h"
+#include "JSScope.h"
#include "NumericStrings.h"
-#include "ScopeChain.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/text/ASCIIFastPath.h>
#include <wtf/text/StringHash.h>
using WTF::ThreadSpecific;
namespace JSC {
-IdentifierTable* createIdentifierTable()
+PassRef<StringImpl> Identifier::add(VM* vm, const char* c)
{
- return new IdentifierTable;
-}
-
-void deleteIdentifierTable(IdentifierTable* table)
-{
- delete table;
-}
-
-struct IdentifierCStringTranslator {
- static unsigned hash(const LChar* c)
- {
- return StringHasher::computeHash<LChar>(c);
- }
-
- static bool equal(StringImpl* r, const LChar* s)
- {
- return Identifier::equal(r, s);
- }
-
- static void translate(StringImpl*& location, const LChar* c, unsigned hash)
- {
- size_t length = strlen(reinterpret_cast<const char*>(c));
- LChar* d;
- StringImpl* r = StringImpl::createUninitialized(length, d).leakRef();
- for (size_t i = 0; i != length; i++)
- d[i] = c[i];
- r->setHash(hash);
- location = r;
- }
-};
-
-struct IdentifierLCharFromUCharTranslator {
- static unsigned hash(const CharBuffer<UChar>& buf)
- {
- return StringHasher::computeHash<UChar>(buf.s, buf.length);
- }
-
- static bool equal(StringImpl* str, const CharBuffer<UChar>& buf)
- {
- return Identifier::equal(str, buf.s, buf.length);
- }
-
- static void translate(StringImpl*& location, const CharBuffer<UChar>& buf, unsigned hash)
- {
- LChar* d;
- StringImpl* r = StringImpl::createUninitialized(buf.length, d).leakRef();
- for (unsigned i = 0; i != buf.length; i++) {
- UChar c = buf.s[i];
- ASSERT(c <= 0xff);
- d[i] = c;
- }
- r->setHash(hash);
- location = r;
- }
-};
-
-PassRefPtr<StringImpl> Identifier::add(JSGlobalData* globalData, const char* c)
-{
- if (!c)
- return 0;
- if (!c[0])
- return StringImpl::empty();
+ ASSERT(c);
+ ASSERT(c[0]);
if (!c[1])
- return add(globalData, globalData->smallStrings.singleCharacterStringRep(c[0]));
-
- IdentifierTable& identifierTable = *globalData->identifierTable;
- LiteralIdentifierTable& literalIdentifierTable = identifierTable.literalTable();
-
- const LiteralIdentifierTable::iterator& iter = literalIdentifierTable.find(c);
- if (iter != literalIdentifierTable.end())
- return iter->second;
-
- HashSet<StringImpl*>::AddResult addResult = identifierTable.add<const LChar*, IdentifierCStringTranslator>(reinterpret_cast<const LChar*>(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<StringImpl> addedString = addResult.isNewEntry ? adoptRef(*addResult.iterator) : *addResult.iterator;
+ return *vm->smallStrings.singleCharacterStringRep(c[0]);
- literalIdentifierTable.add(c, addedString.get());
-
- return addedString.release();
+ return *AtomicString::add(c);
}
-PassRefPtr<StringImpl> Identifier::add(ExecState* exec, const char* c)
+PassRef<StringImpl> Identifier::add(ExecState* exec, const char* c)
{
- return add(&exec->globalData(), c);
+ return add(&exec->vm(), c);
}
-PassRefPtr<StringImpl> Identifier::add8(JSGlobalData* globalData, const UChar* s, int length)
+PassRef<StringImpl> Identifier::add8(VM* vm, const UChar* s, int length)
{
if (length == 1) {
UChar c = s[0];
ASSERT(c <= 0xff);
if (canUseSingleCharacterString(c))
- return add(globalData, globalData->smallStrings.singleCharacterStringRep(c));
- }
-
- if (!length)
- return StringImpl::empty();
- CharBuffer<UChar> buf = {s, length};
- HashSet<StringImpl*>::AddResult addResult = globalData->identifierTable->add<CharBuffer<UChar>, IdentifierLCharFromUCharTranslator >(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.isNewEntry ? adoptRef(*addResult.iterator) : *addResult.iterator;
-}
-
-template <typename CharType>
-ALWAYS_INLINE uint32_t Identifier::toUInt32FromCharacters(const CharType* characters, unsigned length, bool& ok)
-{
- // Get the first character, turning it into a digit.
- uint32_t value = characters[0] - '0';
- if (value > 9)
- return 0;
-
- // Check for leading zeros. If the first characher is 0, then the
- // length of the string must be one - e.g. "042" is not equal to "42".
- if (!value && length > 1)
- return 0;
-
- while (--length) {
- // Multiply value by 10, checking for overflow out of 32 bits.
- if (value > 0xFFFFFFFFU / 10)
- return 0;
- value *= 10;
-
- // Get the next character, turning it into a digit.
- uint32_t newValue = *(++characters) - '0';
- if (newValue > 9)
- return 0;
-
- // Add in the old value, checking for overflow out of 32 bits.
- newValue += value;
- if (newValue < value)
- return 0;
- value = newValue;
+ return *vm->smallStrings.singleCharacterStringRep(c);
}
-
- ok = true;
- return value;
-}
-
-uint32_t Identifier::toUInt32(const UString& string, bool& ok)
-{
- ok = false;
-
- unsigned length = string.length();
-
- // An empty string is not a number.
if (!length)
- return 0;
-
- if (string.is8Bit())
- return toUInt32FromCharacters(string.characters8(), length, ok);
- return toUInt32FromCharacters(string.characters16(), length, ok);
-}
-
-PassRefPtr<StringImpl> Identifier::addSlowCase(JSGlobalData* globalData, StringImpl* r)
-{
- 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());
+ return *StringImpl::empty();
- if (r->length() == 1) {
- UChar c = (*r)[0];
- if (c <= maxSingleCharacterString)
- r = globalData->smallStrings.singleCharacterStringRep(c);
- if (r->isIdentifier())
- return r;
- }
-
- return *globalData->identifierTable->add(r).iterator;
-}
-
-PassRefPtr<StringImpl> Identifier::addSlowCase(ExecState* exec, StringImpl* r)
-{
- return addSlowCase(&exec->globalData(), r);
+ return *AtomicString::add(s, length);
}
Identifier Identifier::from(ExecState* exec, unsigned value)
{
- return Identifier(exec, exec->globalData().numericStrings.add(value));
+ return Identifier(exec, exec->vm().numericStrings.add(value));
}
Identifier Identifier::from(ExecState* exec, int value)
{
- return Identifier(exec, exec->globalData().numericStrings.add(value));
+ return Identifier(exec, exec->vm().numericStrings.add(value));
}
Identifier Identifier::from(ExecState* exec, double value)
{
- return Identifier(exec, exec->globalData().numericStrings.add(value));
+ return Identifier(exec, exec->vm().numericStrings.add(value));
}
-Identifier Identifier::from(JSGlobalData* globalData, unsigned value)
+Identifier Identifier::from(VM* vm, unsigned value)
{
- return Identifier(globalData, globalData->numericStrings.add(value));
+ return Identifier(vm, vm->numericStrings.add(value));
}
-Identifier Identifier::from(JSGlobalData* globalData, int value)
+Identifier Identifier::from(VM* vm, int value)
{
- return Identifier(globalData, globalData->numericStrings.add(value));
+ return Identifier(vm, vm->numericStrings.add(value));
}
-Identifier Identifier::from(JSGlobalData* globalData, double value)
+Identifier Identifier::from(VM* vm, double value)
{
- return Identifier(globalData, globalData->numericStrings.add(value));
+ return Identifier(vm, vm->numericStrings.add(value));
}
#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!
-NO_RETURN_DUE_TO_CRASH void Identifier::checkCurrentIdentifierTable(JSGlobalData*) { CRASH(); }
-NO_RETURN_DUE_TO_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