| /* |
| * Copyright (C) 1999-2001 Harri Porten (porten@kde.org) |
| * Copyright (C) 2001 Peter Kelly (pmk@post.com) |
| * 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. |
| * |
| */ |
| |
| #ifndef JSString_h |
| #define JSString_h |
| |
| #include "CallFrame.h" |
| #include "CommonIdentifiers.h" |
| #include "Identifier.h" |
| #include "PropertyDescriptor.h" |
| #include "PropertySlot.h" |
| #include "RopeImpl.h" |
| #include "Structure.h" |
| |
| namespace JSC { |
| |
| class JSString; |
| |
| JSString* jsEmptyString(JSGlobalData*); |
| JSString* jsEmptyString(ExecState*); |
| JSString* jsString(JSGlobalData*, const UString&); // returns empty string if passed null string |
| JSString* jsString(ExecState*, const UString&); // returns empty string if passed null string |
| |
| JSString* jsSingleCharacterString(JSGlobalData*, UChar); |
| JSString* jsSingleCharacterString(ExecState*, UChar); |
| JSString* jsSingleCharacterSubstring(ExecState*, const UString&, unsigned offset); |
| JSString* jsSubstring(JSGlobalData*, const UString&, unsigned offset, unsigned length); |
| JSString* jsSubstring(ExecState*, const UString&, unsigned offset, unsigned length); |
| |
| // Non-trivial strings are two or more characters long. |
| // These functions are faster than just calling jsString. |
| JSString* jsNontrivialString(JSGlobalData*, const UString&); |
| JSString* jsNontrivialString(ExecState*, const UString&); |
| JSString* jsNontrivialString(JSGlobalData*, const char*); |
| JSString* jsNontrivialString(ExecState*, const char*); |
| |
| // Should be used for strings that are owned by an object that will |
| // likely outlive the JSValue this makes, such as the parse tree or a |
| // DOM object that contains a UString |
| JSString* jsOwnedString(JSGlobalData*, const UString&); |
| JSString* jsOwnedString(ExecState*, const UString&); |
| |
| typedef void (*JSStringFinalizerCallback)(JSString*, void* context); |
| JSString* jsStringWithFinalizer(ExecState*, const UString&, JSStringFinalizerCallback callback, void* context); |
| |
| class JS_EXPORTCLASS JSString : public JSCell { |
| public: |
| friend class JIT; |
| friend class JSGlobalData; |
| friend class SpecializedThunkJIT; |
| friend struct ThunkHelpers; |
| |
| class RopeBuilder { |
| public: |
| RopeBuilder(unsigned fiberCount) |
| : m_index(0) |
| , m_rope(RopeImpl::tryCreateUninitialized(fiberCount)) |
| { |
| } |
| |
| bool isOutOfMemory() { return !m_rope; } |
| |
| void append(RopeImpl::Fiber& fiber) |
| { |
| ASSERT(m_rope); |
| m_rope->initializeFiber(m_index, fiber); |
| } |
| void append(const UString& string) |
| { |
| ASSERT(m_rope); |
| m_rope->initializeFiber(m_index, string.impl()); |
| } |
| void append(JSString* jsString) |
| { |
| if (jsString->isRope()) { |
| for (unsigned i = 0; i < jsString->m_fiberCount; ++i) |
| append(jsString->m_other.m_fibers[i]); |
| } else |
| append(jsString->string()); |
| } |
| |
| PassRefPtr<RopeImpl> release() |
| { |
| ASSERT(m_index == m_rope->fiberCount()); |
| return m_rope.release(); |
| } |
| |
| unsigned length() { return m_rope->length(); } |
| |
| private: |
| unsigned m_index; |
| RefPtr<RopeImpl> m_rope; |
| }; |
| |
| class RopeIterator { |
| public: |
| RopeIterator() { } |
| |
| RopeIterator(RopeImpl::Fiber* fibers, size_t fiberCount) |
| { |
| ASSERT(fiberCount); |
| m_workQueue.append(WorkItem(fibers, fiberCount)); |
| skipRopes(); |
| } |
| |
| RopeIterator& operator++() |
| { |
| WorkItem& item = m_workQueue.last(); |
| ASSERT(!RopeImpl::isRope(item.fibers[item.i])); |
| if (++item.i == item.fiberCount) |
| m_workQueue.removeLast(); |
| skipRopes(); |
| return *this; |
| } |
| |
| StringImpl* operator*() |
| { |
| WorkItem& item = m_workQueue.last(); |
| RopeImpl::Fiber fiber = item.fibers[item.i]; |
| ASSERT(!RopeImpl::isRope(fiber)); |
| return static_cast<StringImpl*>(fiber); |
| } |
| |
| bool operator!=(const RopeIterator& other) const |
| { |
| return m_workQueue != other.m_workQueue; |
| } |
| |
| private: |
| struct WorkItem { |
| WorkItem(RopeImpl::Fiber* fibers, size_t fiberCount) |
| : fibers(fibers) |
| , fiberCount(fiberCount) |
| , i(0) |
| { |
| } |
| |
| bool operator!=(const WorkItem& other) const |
| { |
| return fibers != other.fibers || fiberCount != other.fiberCount || i != other.i; |
| } |
| |
| RopeImpl::Fiber* fibers; |
| size_t fiberCount; |
| size_t i; |
| }; |
| |
| void skipRopes() |
| { |
| if (m_workQueue.isEmpty()) |
| return; |
| |
| while (1) { |
| WorkItem& item = m_workQueue.last(); |
| RopeImpl::Fiber fiber = item.fibers[item.i]; |
| if (!RopeImpl::isRope(fiber)) |
| break; |
| RopeImpl* rope = static_cast<RopeImpl*>(fiber); |
| if (++item.i == item.fiberCount) |
| m_workQueue.removeLast(); |
| m_workQueue.append(WorkItem(rope->fibers(), rope->fiberCount())); |
| } |
| } |
| |
| Vector<WorkItem, 16> m_workQueue; |
| }; |
| |
| ALWAYS_INLINE JSString(JSGlobalData* globalData, const UString& value) |
| : JSCell(*globalData, globalData->stringStructure.get()) |
| , m_length(value.length()) |
| , m_value(value) |
| , m_fiberCount(0) |
| { |
| ASSERT(!m_value.isNull()); |
| Heap::heap(this)->reportExtraMemoryCost(value.impl()->cost()); |
| } |
| |
| enum HasOtherOwnerType { HasOtherOwner }; |
| JSString(JSGlobalData* globalData, const UString& value, HasOtherOwnerType) |
| : JSCell(*globalData, globalData->stringStructure.get()) |
| , m_length(value.length()) |
| , m_value(value) |
| , m_fiberCount(0) |
| { |
| ASSERT(!m_value.isNull()); |
| } |
| JSString(JSGlobalData* globalData, PassRefPtr<StringImpl> value, HasOtherOwnerType) |
| : JSCell(*globalData, globalData->stringStructure.get()) |
| , m_length(value->length()) |
| , m_value(value) |
| , m_fiberCount(0) |
| { |
| ASSERT(!m_value.isNull()); |
| } |
| JSString(JSGlobalData* globalData, PassRefPtr<RopeImpl> rope) |
| : JSCell(*globalData, globalData->stringStructure.get()) |
| , m_length(rope->length()) |
| , m_fiberCount(1) |
| { |
| m_other.m_fibers[0] = rope.leakRef(); |
| } |
| // This constructor constructs a new string by concatenating s1 & s2. |
| // This should only be called with fiberCount <= 3. |
| JSString(JSGlobalData* globalData, unsigned fiberCount, JSString* s1, JSString* s2) |
| : JSCell(*globalData, globalData->stringStructure.get()) |
| , m_length(s1->length() + s2->length()) |
| , m_fiberCount(fiberCount) |
| { |
| ASSERT(fiberCount <= s_maxInternalRopeLength); |
| unsigned index = 0; |
| appendStringInConstruct(index, s1); |
| appendStringInConstruct(index, s2); |
| ASSERT(fiberCount == index); |
| } |
| // This constructor constructs a new string by concatenating s1 & s2. |
| // This should only be called with fiberCount <= 3. |
| JSString(JSGlobalData* globalData, unsigned fiberCount, JSString* s1, const UString& u2) |
| : JSCell(*globalData, globalData->stringStructure.get()) |
| , m_length(s1->length() + u2.length()) |
| , m_fiberCount(fiberCount) |
| { |
| ASSERT(fiberCount <= s_maxInternalRopeLength); |
| unsigned index = 0; |
| appendStringInConstruct(index, s1); |
| appendStringInConstruct(index, u2); |
| ASSERT(fiberCount == index); |
| } |
| // This constructor constructs a new string by concatenating s1 & s2. |
| // This should only be called with fiberCount <= 3. |
| JSString(JSGlobalData* globalData, unsigned fiberCount, const UString& u1, JSString* s2) |
| : JSCell(*globalData, globalData->stringStructure.get()) |
| , m_length(u1.length() + s2->length()) |
| , m_fiberCount(fiberCount) |
| { |
| ASSERT(fiberCount <= s_maxInternalRopeLength); |
| unsigned index = 0; |
| appendStringInConstruct(index, u1); |
| appendStringInConstruct(index, s2); |
| ASSERT(fiberCount == index); |
| } |
| // This constructor constructs a new string by concatenating v1, v2 & v3. |
| // This should only be called with fiberCount <= 3 ... which since every |
| // value must require a fiberCount of at least one implies that the length |
| // for each value must be exactly 1! |
| JSString(ExecState* exec, JSValue v1, JSValue v2, JSValue v3) |
| : JSCell(exec->globalData(), exec->globalData().stringStructure.get()) |
| , m_length(0) |
| , m_fiberCount(s_maxInternalRopeLength) |
| { |
| unsigned index = 0; |
| appendValueInConstructAndIncrementLength(exec, index, v1); |
| appendValueInConstructAndIncrementLength(exec, index, v2); |
| appendValueInConstructAndIncrementLength(exec, index, v3); |
| ASSERT(index == s_maxInternalRopeLength); |
| } |
| |
| // This constructor constructs a new string by concatenating u1 & u2. |
| JSString(JSGlobalData* globalData, const UString& u1, const UString& u2) |
| : JSCell(*globalData, globalData->stringStructure.get()) |
| , m_length(u1.length() + u2.length()) |
| , m_fiberCount(2) |
| { |
| unsigned index = 0; |
| appendStringInConstruct(index, u1); |
| appendStringInConstruct(index, u2); |
| ASSERT(index <= s_maxInternalRopeLength); |
| } |
| |
| // This constructor constructs a new string by concatenating u1, u2 & u3. |
| JSString(JSGlobalData* globalData, const UString& u1, const UString& u2, const UString& u3) |
| : JSCell(*globalData, globalData->stringStructure.get()) |
| , m_length(u1.length() + u2.length() + u3.length()) |
| , m_fiberCount(s_maxInternalRopeLength) |
| { |
| unsigned index = 0; |
| appendStringInConstruct(index, u1); |
| appendStringInConstruct(index, u2); |
| appendStringInConstruct(index, u3); |
| ASSERT(index <= s_maxInternalRopeLength); |
| } |
| |
| JSString(JSGlobalData* globalData, const UString& value, JSStringFinalizerCallback finalizer, void* context) |
| : JSCell(*globalData, globalData->stringStructure.get()) |
| , m_length(value.length()) |
| , m_value(value) |
| , m_fiberCount(0) |
| { |
| ASSERT(!m_value.isNull()); |
| // nasty hack because we can't union non-POD types |
| m_other.m_finalizerCallback = finalizer; |
| m_other.m_finalizerContext = context; |
| Heap::heap(this)->reportExtraMemoryCost(value.impl()->cost()); |
| } |
| |
| ~JSString() |
| { |
| ASSERT(vptr() == JSGlobalData::jsStringVPtr); |
| if (!m_fiberCount) { |
| if (m_other.m_finalizerCallback) |
| m_other.m_finalizerCallback(this, m_other.m_finalizerContext); |
| } else { |
| unsigned i = 0; |
| do |
| RopeImpl::deref(m_other.m_fibers[i]); |
| while (++i < m_fiberCount); |
| } |
| } |
| |
| const UString& value(ExecState* exec) const |
| { |
| if (isRope()) |
| resolveRope(exec); |
| return m_value; |
| } |
| const UString& tryGetValue() const |
| { |
| if (isRope()) |
| resolveRope(0); |
| return m_value; |
| } |
| unsigned length() { return m_length; } |
| |
| bool getStringPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot&); |
| bool getStringPropertySlot(ExecState*, unsigned propertyName, PropertySlot&); |
| bool getStringPropertyDescriptor(ExecState*, const Identifier& propertyName, PropertyDescriptor&); |
| |
| bool canGetIndex(unsigned i) { return i < m_length; } |
| JSString* getIndex(ExecState*, unsigned); |
| JSString* getIndexSlowCase(ExecState*, unsigned); |
| |
| JSValue replaceCharacter(ExecState*, UChar, const UString& replacement); |
| |
| static Structure* createStructure(JSGlobalData& globalData, JSValue proto) { return Structure::create(globalData, proto, TypeInfo(StringType, OverridesGetOwnPropertySlot | NeedsThisConversion), AnonymousSlotCount, 0); } |
| |
| private: |
| JSString(VPtrStealingHackType) |
| : JSCell(VPtrStealingHack) |
| , m_fiberCount(0) |
| { |
| } |
| |
| void resolveRope(ExecState*) const; |
| JSString* substringFromRope(ExecState*, unsigned offset, unsigned length); |
| |
| void appendStringInConstruct(unsigned& index, const UString& string) |
| { |
| StringImpl* impl = string.impl(); |
| impl->ref(); |
| m_other.m_fibers[index++] = impl; |
| } |
| |
| void appendStringInConstruct(unsigned& index, JSString* jsString) |
| { |
| if (jsString->isRope()) { |
| for (unsigned i = 0; i < jsString->m_fiberCount; ++i) { |
| RopeImpl::Fiber fiber = jsString->m_other.m_fibers[i]; |
| fiber->ref(); |
| m_other.m_fibers[index++] = fiber; |
| } |
| } else |
| appendStringInConstruct(index, jsString->string()); |
| } |
| |
| void appendValueInConstructAndIncrementLength(ExecState* exec, unsigned& index, JSValue v) |
| { |
| if (v.isString()) { |
| ASSERT(v.asCell()->isString()); |
| JSString* s = static_cast<JSString*>(v.asCell()); |
| ASSERT(s->fiberCount() == 1); |
| appendStringInConstruct(index, s); |
| m_length += s->length(); |
| } else { |
| UString u(v.toString(exec)); |
| StringImpl* impl = u.impl(); |
| impl->ref(); |
| m_other.m_fibers[index++] = impl; |
| m_length += u.length(); |
| } |
| } |
| |
| virtual JSValue toPrimitive(ExecState*, PreferredPrimitiveType) const; |
| virtual bool getPrimitiveNumber(ExecState*, double& number, JSValue& value); |
| virtual bool toBoolean(ExecState*) const; |
| virtual double toNumber(ExecState*) const; |
| virtual JSObject* toObject(ExecState*, JSGlobalObject*) const; |
| virtual UString toString(ExecState*) const; |
| |
| virtual JSObject* toThisObject(ExecState*) const; |
| |
| // Actually getPropertySlot, not getOwnPropertySlot (see JSCell). |
| virtual bool getOwnPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot&); |
| virtual bool getOwnPropertySlot(ExecState*, unsigned propertyName, PropertySlot&); |
| virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&); |
| |
| static const unsigned s_maxInternalRopeLength = 3; |
| |
| // A string is represented either by a UString or a RopeImpl. |
| unsigned m_length; |
| mutable UString m_value; |
| mutable unsigned m_fiberCount; |
| // This structure exists to support a temporary workaround for a GC issue. |
| struct JSStringFinalizerStruct { |
| JSStringFinalizerStruct() : m_finalizerCallback(0) {} |
| union { |
| mutable FixedArray<RopeImpl::Fiber, s_maxInternalRopeLength> m_fibers; |
| struct { |
| JSStringFinalizerCallback m_finalizerCallback; |
| void* m_finalizerContext; |
| }; |
| }; |
| } m_other; |
| |
| bool isRope() const { return m_fiberCount; } |
| UString& string() { ASSERT(!isRope()); return m_value; } |
| unsigned fiberCount() { return m_fiberCount ? m_fiberCount : 1; } |
| |
| friend JSValue jsString(ExecState* exec, JSString* s1, JSString* s2); |
| friend JSValue jsString(ExecState* exec, const UString& u1, JSString* s2); |
| friend JSValue jsString(ExecState* exec, JSString* s1, const UString& u2); |
| friend JSValue jsString(ExecState* exec, Register* strings, unsigned count); |
| friend JSValue jsString(ExecState* exec, JSValue thisValue); |
| friend JSString* jsStringWithFinalizer(ExecState*, const UString&, JSStringFinalizerCallback callback, void* context); |
| friend JSString* jsSubstring(ExecState* exec, JSString* s, unsigned offset, unsigned length); |
| }; |
| |
| JSString* asString(JSValue); |
| |
| // When an object is created from a different DLL, MSVC changes vptr to a "local" one right after invoking a constructor, |
| // see <http://groups.google.com/group/microsoft.public.vc.language/msg/55cdcefeaf770212>. |
| // This breaks isJSString(), and we don't need that hack anyway, so we change vptr back to primary one. |
| // The below function must be called by any inline function that invokes a JSString constructor. |
| #if COMPILER(MSVC) && !defined(BUILDING_JavaScriptCore) |
| inline JSString* fixupVPtr(JSGlobalData* globalData, JSString* string) { string->setVPtr(globalData->jsStringVPtr); return string; } |
| #else |
| inline JSString* fixupVPtr(JSGlobalData*, JSString* string) { return string; } |
| #endif |
| |
| inline JSString* asString(JSValue value) |
| { |
| ASSERT(value.asCell()->isString()); |
| return static_cast<JSString*>(value.asCell()); |
| } |
| |
| inline JSString* jsEmptyString(JSGlobalData* globalData) |
| { |
| return globalData->smallStrings.emptyString(globalData); |
| } |
| |
| inline JSString* jsSingleCharacterString(JSGlobalData* globalData, UChar c) |
| { |
| if (c <= maxSingleCharacterString) |
| return globalData->smallStrings.singleCharacterString(globalData, c); |
| return fixupVPtr(globalData, new (globalData) JSString(globalData, UString(&c, 1))); |
| } |
| |
| inline JSString* jsSingleCharacterSubstring(ExecState* exec, const UString& s, unsigned offset) |
| { |
| JSGlobalData* globalData = &exec->globalData(); |
| ASSERT(offset < static_cast<unsigned>(s.length())); |
| UChar c = s.characters()[offset]; |
| if (c <= maxSingleCharacterString) |
| return globalData->smallStrings.singleCharacterString(globalData, c); |
| return fixupVPtr(globalData, new (globalData) JSString(globalData, UString(StringImpl::create(s.impl(), offset, 1)))); |
| } |
| |
| inline JSString* jsNontrivialString(JSGlobalData* globalData, const char* s) |
| { |
| ASSERT(s); |
| ASSERT(s[0]); |
| ASSERT(s[1]); |
| return fixupVPtr(globalData, new (globalData) JSString(globalData, s)); |
| } |
| |
| inline JSString* jsNontrivialString(JSGlobalData* globalData, const UString& s) |
| { |
| ASSERT(s.length() > 1); |
| return fixupVPtr(globalData, new (globalData) JSString(globalData, s)); |
| } |
| |
| inline JSString* JSString::getIndex(ExecState* exec, unsigned i) |
| { |
| ASSERT(canGetIndex(i)); |
| if (isRope()) |
| return getIndexSlowCase(exec, i); |
| ASSERT(i < m_value.length()); |
| return jsSingleCharacterSubstring(exec, m_value, i); |
| } |
| |
| inline JSString* jsString(JSGlobalData* globalData, const UString& s) |
| { |
| int size = s.length(); |
| if (!size) |
| return globalData->smallStrings.emptyString(globalData); |
| if (size == 1) { |
| UChar c = s.characters()[0]; |
| if (c <= maxSingleCharacterString) |
| return globalData->smallStrings.singleCharacterString(globalData, c); |
| } |
| return fixupVPtr(globalData, new (globalData) JSString(globalData, s)); |
| } |
| |
| inline JSString* jsStringWithFinalizer(ExecState* exec, const UString& s, JSStringFinalizerCallback callback, void* context) |
| { |
| ASSERT(s.length() && (s.length() > 1 || s.characters()[0] > maxSingleCharacterString)); |
| JSGlobalData* globalData = &exec->globalData(); |
| return fixupVPtr(globalData, new (globalData) JSString(globalData, s, callback, context)); |
| } |
| |
| inline JSString* jsSubstring(ExecState* exec, JSString* s, unsigned offset, unsigned length) |
| { |
| ASSERT(offset <= static_cast<unsigned>(s->length())); |
| ASSERT(length <= static_cast<unsigned>(s->length())); |
| ASSERT(offset + length <= static_cast<unsigned>(s->length())); |
| JSGlobalData* globalData = &exec->globalData(); |
| if (!length) |
| return globalData->smallStrings.emptyString(globalData); |
| if (s->isRope()) |
| return s->substringFromRope(exec, offset, length); |
| return jsSubstring(globalData, s->m_value, offset, length); |
| } |
| |
| inline JSString* jsSubstring(JSGlobalData* globalData, const UString& s, unsigned offset, unsigned length) |
| { |
| ASSERT(offset <= static_cast<unsigned>(s.length())); |
| ASSERT(length <= static_cast<unsigned>(s.length())); |
| ASSERT(offset + length <= static_cast<unsigned>(s.length())); |
| if (!length) |
| return globalData->smallStrings.emptyString(globalData); |
| if (length == 1) { |
| UChar c = s.characters()[offset]; |
| if (c <= maxSingleCharacterString) |
| return globalData->smallStrings.singleCharacterString(globalData, c); |
| } |
| return fixupVPtr(globalData, new (globalData) JSString(globalData, UString(StringImpl::create(s.impl(), offset, length)), JSString::HasOtherOwner)); |
| } |
| |
| inline JSString* jsOwnedString(JSGlobalData* globalData, const UString& s) |
| { |
| int size = s.length(); |
| if (!size) |
| return globalData->smallStrings.emptyString(globalData); |
| if (size == 1) { |
| UChar c = s.characters()[0]; |
| if (c <= maxSingleCharacterString) |
| return globalData->smallStrings.singleCharacterString(globalData, c); |
| } |
| return fixupVPtr(globalData, new (globalData) JSString(globalData, s, JSString::HasOtherOwner)); |
| } |
| |
| inline JSString* jsEmptyString(ExecState* exec) { return jsEmptyString(&exec->globalData()); } |
| inline JSString* jsString(ExecState* exec, const UString& s) { return jsString(&exec->globalData(), s); } |
| inline JSString* jsSingleCharacterString(ExecState* exec, UChar c) { return jsSingleCharacterString(&exec->globalData(), c); } |
| inline JSString* jsSubstring(ExecState* exec, const UString& s, unsigned offset, unsigned length) { return jsSubstring(&exec->globalData(), s, offset, length); } |
| inline JSString* jsNontrivialString(ExecState* exec, const UString& s) { return jsNontrivialString(&exec->globalData(), s); } |
| inline JSString* jsNontrivialString(ExecState* exec, const char* s) { return jsNontrivialString(&exec->globalData(), s); } |
| inline JSString* jsOwnedString(ExecState* exec, const UString& s) { return jsOwnedString(&exec->globalData(), s); } |
| |
| ALWAYS_INLINE bool JSString::getStringPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot) |
| { |
| if (propertyName == exec->propertyNames().length) { |
| slot.setValue(jsNumber(m_length)); |
| return true; |
| } |
| |
| bool isStrictUInt32; |
| unsigned i = propertyName.toUInt32(isStrictUInt32); |
| if (isStrictUInt32 && i < m_length) { |
| slot.setValue(getIndex(exec, i)); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| ALWAYS_INLINE bool JSString::getStringPropertySlot(ExecState* exec, unsigned propertyName, PropertySlot& slot) |
| { |
| if (propertyName < m_length) { |
| slot.setValue(getIndex(exec, propertyName)); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| inline bool isJSString(JSGlobalData* globalData, JSValue v) { return v.isCell() && v.asCell()->vptr() == globalData->jsStringVPtr; } |
| |
| // --- JSValue inlines ---------------------------- |
| |
| inline UString JSValue::toString(ExecState* exec) const |
| { |
| if (isString()) |
| return static_cast<JSString*>(asCell())->value(exec); |
| if (isInt32()) |
| return exec->globalData().numericStrings.add(asInt32()); |
| if (isDouble()) |
| return exec->globalData().numericStrings.add(asDouble()); |
| if (isTrue()) |
| return "true"; |
| if (isFalse()) |
| return "false"; |
| if (isNull()) |
| return "null"; |
| if (isUndefined()) |
| return "undefined"; |
| ASSERT(isCell()); |
| return asCell()->toString(exec); |
| } |
| |
| inline UString JSValue::toPrimitiveString(ExecState* exec) const |
| { |
| ASSERT(!isString()); |
| if (isInt32()) |
| return exec->globalData().numericStrings.add(asInt32()); |
| if (isDouble()) |
| return exec->globalData().numericStrings.add(asDouble()); |
| if (isTrue()) |
| return "true"; |
| if (isFalse()) |
| return "false"; |
| if (isNull()) |
| return "null"; |
| if (isUndefined()) |
| return "undefined"; |
| ASSERT(isCell()); |
| return asCell()->toPrimitive(exec, NoPreference).toString(exec); |
| } |
| |
| } // namespace JSC |
| |
| #endif // JSString_h |
