diff options
Diffstat (limited to 'Source/JavaScriptCore/runtime/JSString.h')
| -rw-r--r-- | Source/JavaScriptCore/runtime/JSString.h | 892 |
1 files changed, 445 insertions, 447 deletions
diff --git a/Source/JavaScriptCore/runtime/JSString.h b/Source/JavaScriptCore/runtime/JSString.h index 245c48a51..855de974d 100644 --- a/Source/JavaScriptCore/runtime/JSString.h +++ b/Source/JavaScriptCore/runtime/JSString.h @@ -31,525 +31,523 @@ namespace JSC { - class JSString; - class JSRopeString; - class LLIntOffsetsExtractor; - - JSString* jsEmptyString(JSGlobalData*); - JSString* jsEmptyString(ExecState*); - JSString* jsString(JSGlobalData*, const String&); // returns empty string if passed null string - JSString* jsString(ExecState*, const String&); // returns empty string if passed null string - - JSString* jsSingleCharacterString(JSGlobalData*, UChar); - JSString* jsSingleCharacterString(ExecState*, UChar); - JSString* jsSingleCharacterSubstring(ExecState*, const String&, unsigned offset); - JSString* jsSubstring(JSGlobalData*, const String&, unsigned offset, unsigned length); - JSString* jsSubstring(ExecState*, const String&, 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 String&); - JSString* jsNontrivialString(ExecState*, const String&); - - // 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 String - JSString* jsOwnedString(JSGlobalData*, const String&); - JSString* jsOwnedString(ExecState*, const String&); - - JSRopeString* jsStringBuilder(JSGlobalData*); - - class JSString : public JSCell { - public: - friend class JIT; - friend class JSGlobalData; - friend class SpecializedThunkJIT; - friend class JSRopeString; - friend class MarkStack; - friend class SlotVisitor; - friend struct ThunkHelpers; - - typedef JSCell Base; - - static const bool needsDestruction = true; - static const bool hasImmortalStructure = true; - static void destroy(JSCell*); - - private: - JSString(JSGlobalData& globalData, PassRefPtr<StringImpl> value) - : JSCell(globalData, globalData.stringStructure.get()) - , m_flags(0) - , m_value(value) - { - } +class JSString; +class JSRopeString; +class LLIntOffsetsExtractor; + +JSString* jsEmptyString(VM*); +JSString* jsEmptyString(ExecState*); +JSString* jsString(VM*, const String&); // returns empty string if passed null string +JSString* jsString(ExecState*, const String&); // returns empty string if passed null string + +JSString* jsSingleCharacterString(VM*, UChar); +JSString* jsSingleCharacterString(ExecState*, UChar); +JSString* jsSingleCharacterSubstring(ExecState*, const String&, unsigned offset); +JSString* jsSubstring(VM*, const String&, unsigned offset, unsigned length); +JSString* jsSubstring(ExecState*, const String&, unsigned offset, unsigned length); + +// Non-trivial strings are two or more characters long. +// These functions are faster than just calling jsString. +JSString* jsNontrivialString(VM*, const String&); +JSString* jsNontrivialString(ExecState*, const String&); + +// 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 String +JSString* jsOwnedString(VM*, const String&); +JSString* jsOwnedString(ExecState*, const String&); + +JSRopeString* jsStringBuilder(VM*); + +class JSString : public JSCell { +public: + friend class JIT; + friend class VM; + friend class SpecializedThunkJIT; + friend class JSRopeString; + friend class MarkStack; + friend class SlotVisitor; + friend struct ThunkHelpers; + + typedef JSCell Base; + + static const bool needsDestruction = true; + static const bool hasImmortalStructure = true; + static void destroy(JSCell*); + +private: + JSString(VM& vm, PassRefPtr<StringImpl> value) + : JSCell(vm, vm.stringStructure.get()) + , m_flags(0) + , m_value(value) + { + } - JSString(JSGlobalData& globalData) - : JSCell(globalData, globalData.stringStructure.get()) - , m_flags(0) - { - } + JSString(VM& vm) + : JSCell(vm, vm.stringStructure.get()) + , m_flags(0) + { + } - void finishCreation(JSGlobalData& globalData, size_t length) - { - ASSERT(!m_value.isNull()); - Base::finishCreation(globalData); - m_length = length; - setIs8Bit(m_value.impl()->is8Bit()); - globalData.m_newStringsSinceLastHashConst++; - } + void finishCreation(VM& vm, size_t length) + { + ASSERT(!m_value.isNull()); + Base::finishCreation(vm); + m_length = length; + setIs8Bit(m_value.impl()->is8Bit()); + vm.m_newStringsSinceLastHashCons++; + } - void finishCreation(JSGlobalData& globalData, size_t length, size_t cost) - { - ASSERT(!m_value.isNull()); - Base::finishCreation(globalData); - m_length = length; - setIs8Bit(m_value.impl()->is8Bit()); - Heap::heap(this)->reportExtraMemoryCost(cost); - globalData.m_newStringsSinceLastHashConst++; - } + void finishCreation(VM& vm, size_t length, size_t cost) + { + ASSERT(!m_value.isNull()); + Base::finishCreation(vm); + m_length = length; + setIs8Bit(m_value.impl()->is8Bit()); + Heap::heap(this)->reportExtraMemoryCost(cost); + vm.m_newStringsSinceLastHashCons++; + } - protected: - void finishCreation(JSGlobalData& globalData) - { - Base::finishCreation(globalData); - m_length = 0; - setIs8Bit(true); - globalData.m_newStringsSinceLastHashConst++; - } +protected: + void finishCreation(VM& vm) + { + Base::finishCreation(vm); + m_length = 0; + setIs8Bit(true); + vm.m_newStringsSinceLastHashCons++; + } - public: - static JSString* create(JSGlobalData& globalData, PassRefPtr<StringImpl> value) - { - ASSERT(value); - size_t length = value->length(); - size_t cost = value->cost(); - JSString* newString = new (NotNull, allocateCell<JSString>(globalData.heap)) JSString(globalData, value); - newString->finishCreation(globalData, length, cost); - return newString; - } - static JSString* createHasOtherOwner(JSGlobalData& globalData, PassRefPtr<StringImpl> value) - { - ASSERT(value); - size_t length = value->length(); - JSString* newString = new (NotNull, allocateCell<JSString>(globalData.heap)) JSString(globalData, value); - newString->finishCreation(globalData, length); - return newString; - } +public: + static JSString* create(VM& vm, PassRefPtr<StringImpl> value) + { + ASSERT(value); + size_t length = value->length(); + size_t cost = value->cost(); + JSString* newString = new (NotNull, allocateCell<JSString>(vm.heap)) JSString(vm, value); + newString->finishCreation(vm, length, cost); + return newString; + } + static JSString* createHasOtherOwner(VM& vm, PassRefPtr<StringImpl> value) + { + ASSERT(value); + size_t length = value->length(); + JSString* newString = new (NotNull, allocateCell<JSString>(vm.heap)) JSString(vm, value); + newString->finishCreation(vm, length); + return newString; + } - const String& value(ExecState*) const; - const String& tryGetValue() const; - unsigned length() { return m_length; } + const String& value(ExecState*) const; + const String& tryGetValue() const; + unsigned length() { return m_length; } - JSValue toPrimitive(ExecState*, PreferredPrimitiveType) const; - JS_EXPORT_PRIVATE bool toBoolean() const; - bool getPrimitiveNumber(ExecState*, double& number, JSValue&) const; - JSObject* toObject(ExecState*, JSGlobalObject*) const; - double toNumber(ExecState*) const; + JSValue toPrimitive(ExecState*, PreferredPrimitiveType) const; + JS_EXPORT_PRIVATE bool toBoolean() const; + bool getPrimitiveNumber(ExecState*, double& number, JSValue&) const; + JSObject* toObject(ExecState*, JSGlobalObject*) const; + double toNumber(ExecState*) const; - bool getStringPropertySlot(ExecState*, PropertyName, PropertySlot&); - bool getStringPropertySlot(ExecState*, unsigned propertyName, PropertySlot&); - bool getStringPropertyDescriptor(ExecState*, PropertyName, PropertyDescriptor&); + bool getStringPropertySlot(ExecState*, PropertyName, PropertySlot&); + bool getStringPropertySlot(ExecState*, unsigned propertyName, PropertySlot&); + bool getStringPropertyDescriptor(ExecState*, PropertyName, PropertyDescriptor&); - bool canGetIndex(unsigned i) { return i < m_length; } - JSString* getIndex(ExecState*, unsigned); + bool canGetIndex(unsigned i) { return i < m_length; } + JSString* getIndex(ExecState*, unsigned); - static Structure* createStructure(JSGlobalData& globalData, JSGlobalObject* globalObject, JSValue proto) - { - return Structure::create(globalData, globalObject, proto, TypeInfo(StringType, OverridesGetOwnPropertySlot | InterceptsGetOwnPropertySlotByIndexEvenWhenLengthIsNotZero), &s_info); - } + static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue proto) + { + return Structure::create(vm, globalObject, proto, TypeInfo(StringType, OverridesGetOwnPropertySlot | InterceptsGetOwnPropertySlotByIndexEvenWhenLengthIsNotZero), &s_info); + } - static size_t offsetOfLength() { return OBJECT_OFFSETOF(JSString, m_length); } - static size_t offsetOfValue() { return OBJECT_OFFSETOF(JSString, m_value); } + static size_t offsetOfLength() { return OBJECT_OFFSETOF(JSString, m_length); } + static size_t offsetOfFlags() { return OBJECT_OFFSETOF(JSString, m_flags); } + static size_t offsetOfValue() { return OBJECT_OFFSETOF(JSString, m_value); } - static JS_EXPORTDATA const ClassInfo s_info; + static JS_EXPORTDATA const ClassInfo s_info; - static void visitChildren(JSCell*, SlotVisitor&); + static void visitChildren(JSCell*, SlotVisitor&); - protected: - bool isRope() const { return m_value.isNull(); } - bool is8Bit() const { return m_flags & Is8Bit; } - void setIs8Bit(bool flag) - { - if (flag) - m_flags |= Is8Bit; - else - m_flags &= ~Is8Bit; - } - bool shouldTryHashConst(); - bool isHashConstSingleton() const { return m_flags & IsHashConstSingleton; } - void clearHashConstSingleton() { m_flags &= ~IsHashConstSingleton; } - void setHashConstSingleton() { m_flags |= IsHashConstSingleton; } - bool tryHashConstLock(); - void releaseHashConstLock(); - - unsigned m_flags; - - enum { - HashConstLock = 1u << 2, - IsHashConstSingleton = 1u << 1, - Is8Bit = 1u - }; + enum { + HashConsLock = 1u << 2, + IsHashConsSingleton = 1u << 1, + Is8Bit = 1u + }; - // A string is represented either by a String or a rope of fibers. - unsigned m_length; - mutable String m_value; +protected: + friend class JSValue; + + bool isRope() const { return m_value.isNull(); } + bool is8Bit() const { return m_flags & Is8Bit; } + void setIs8Bit(bool flag) + { + if (flag) + m_flags |= Is8Bit; + else + m_flags &= ~Is8Bit; + } + bool shouldTryHashCons(); + bool isHashConsSingleton() const { return m_flags & IsHashConsSingleton; } + void clearHashConsSingleton() { m_flags &= ~IsHashConsSingleton; } + void setHashConsSingleton() { m_flags |= IsHashConsSingleton; } + bool tryHashConsLock(); + void releaseHashConsLock(); + + unsigned m_flags; + + // A string is represented either by a String or a rope of fibers. + unsigned m_length; + mutable String m_value; - private: - friend class LLIntOffsetsExtractor; +private: + friend class LLIntOffsetsExtractor; - static JSObject* toThisObject(JSCell*, ExecState*); + static JSObject* toThisObject(JSCell*, ExecState*); - // Actually getPropertySlot, not getOwnPropertySlot (see JSCell). - static bool getOwnPropertySlot(JSCell*, ExecState*, PropertyName, PropertySlot&); - static bool getOwnPropertySlotByIndex(JSCell*, ExecState*, unsigned propertyName, PropertySlot&); + // Actually getPropertySlot, not getOwnPropertySlot (see JSCell). + static bool getOwnPropertySlot(JSCell*, ExecState*, PropertyName, PropertySlot&); + static bool getOwnPropertySlotByIndex(JSCell*, ExecState*, unsigned propertyName, PropertySlot&); - String& string() { ASSERT(!isRope()); return m_value; } + String& string() { ASSERT(!isRope()); return m_value; } - friend JSValue jsString(ExecState*, JSString*, JSString*); - friend JSString* jsSubstring(ExecState*, JSString*, unsigned offset, unsigned length); - }; + friend JSValue jsString(ExecState*, JSString*, JSString*); + friend JSString* jsSubstring(ExecState*, JSString*, unsigned offset, unsigned length); +}; - class JSRopeString : public JSString { - friend class JSString; +class JSRopeString : public JSString { + friend class JSString; - friend JSRopeString* jsStringBuilder(JSGlobalData*); + friend JSRopeString* jsStringBuilder(VM*); - class RopeBuilder { - public: - RopeBuilder(JSGlobalData& globalData) - : m_globalData(globalData) - , m_jsString(jsStringBuilder(&globalData)) + class RopeBuilder { + public: + RopeBuilder(VM& vm) + : m_vm(vm) + , m_jsString(jsStringBuilder(&vm)) , m_index(0) - { - } - - void append(JSString* jsString) - { - if (m_index == JSRopeString::s_maxInternalRopeLength) - expand(); - m_jsString->append(m_globalData, m_index++, jsString); - } - - JSRopeString* release() - { - JSRopeString* tmp = m_jsString; - m_jsString = 0; - return tmp; - } - - unsigned length() { return m_jsString->m_length; } - - private: - void expand(); - - JSGlobalData& m_globalData; - JSRopeString* m_jsString; - size_t m_index; - }; - - private: - JSRopeString(JSGlobalData& globalData) - : JSString(globalData) - { - } - - void finishCreation(JSGlobalData& globalData, JSString* s1, JSString* s2) - { - Base::finishCreation(globalData); - m_length = s1->length() + s2->length(); - setIs8Bit(s1->is8Bit() && s2->is8Bit()); - m_fibers[0].set(globalData, this, s1); - m_fibers[1].set(globalData, this, s2); - } - - void finishCreation(JSGlobalData& globalData, JSString* s1, JSString* s2, JSString* s3) { - Base::finishCreation(globalData); - m_length = s1->length() + s2->length() + s3->length(); - setIs8Bit(s1->is8Bit() && s2->is8Bit() && s3->is8Bit()); - m_fibers[0].set(globalData, this, s1); - m_fibers[1].set(globalData, this, s2); - m_fibers[2].set(globalData, this, s3); } - void finishCreation(JSGlobalData& globalData) + void append(JSString* jsString) { - JSString::finishCreation(globalData); + if (m_index == JSRopeString::s_maxInternalRopeLength) + expand(); + m_jsString->append(m_vm, m_index++, jsString); } - void append(JSGlobalData& globalData, size_t index, JSString* jsString) - { - m_fibers[index].set(globalData, this, jsString); - m_length += jsString->m_length; - setIs8Bit(is8Bit() && jsString->is8Bit()); - } - - static JSRopeString* createNull(JSGlobalData& globalData) - { - JSRopeString* newString = new (NotNull, allocateCell<JSRopeString>(globalData.heap)) JSRopeString(globalData); - newString->finishCreation(globalData); - return newString; - } - - public: - static JSString* create(JSGlobalData& globalData, JSString* s1, JSString* s2) - { - JSRopeString* newString = new (NotNull, allocateCell<JSRopeString>(globalData.heap)) JSRopeString(globalData); - newString->finishCreation(globalData, s1, s2); - return newString; - } - static JSString* create(JSGlobalData& globalData, JSString* s1, JSString* s2, JSString* s3) + JSRopeString* release() { - JSRopeString* newString = new (NotNull, allocateCell<JSRopeString>(globalData.heap)) JSRopeString(globalData); - newString->finishCreation(globalData, s1, s2, s3); - return newString; + JSRopeString* tmp = m_jsString; + m_jsString = 0; + return tmp; } - void visitFibers(SlotVisitor&); + unsigned length() { return m_jsString->m_length; } private: - friend JSValue jsString(ExecState*, Register*, unsigned); - friend JSValue jsStringFromArguments(ExecState*, JSValue); - - JS_EXPORT_PRIVATE void resolveRope(ExecState*) const; - void resolveRopeSlowCase8(LChar*) const; - void resolveRopeSlowCase(UChar*) const; - void outOfMemory(ExecState*) const; - - JSString* getIndexSlowCase(ExecState*, unsigned); - - static const unsigned s_maxInternalRopeLength = 3; - - mutable FixedArray<WriteBarrier<JSString>, s_maxInternalRopeLength> m_fibers; + void expand(); + + VM& m_vm; + JSRopeString* m_jsString; + size_t m_index; }; - - JSString* asString(JSValue); - - inline JSString* asString(JSValue value) + +private: + JSRopeString(VM& vm) + : JSString(vm) { - ASSERT(value.asCell()->isString()); - return jsCast<JSString*>(value.asCell()); } - inline JSString* jsEmptyString(JSGlobalData* globalData) + void finishCreation(VM& vm, JSString* s1, JSString* s2) { - return globalData->smallStrings.emptyString(globalData); + Base::finishCreation(vm); + m_length = s1->length() + s2->length(); + setIs8Bit(s1->is8Bit() && s2->is8Bit()); + m_fibers[0].set(vm, this, s1); + m_fibers[1].set(vm, this, s2); } - - ALWAYS_INLINE JSString* jsSingleCharacterString(JSGlobalData* globalData, UChar c) + + void finishCreation(VM& vm, JSString* s1, JSString* s2, JSString* s3) { - if (c <= maxSingleCharacterString) - return globalData->smallStrings.singleCharacterString(globalData, c); - return JSString::create(*globalData, String(&c, 1).impl()); + Base::finishCreation(vm); + m_length = s1->length() + s2->length() + s3->length(); + setIs8Bit(s1->is8Bit() && s2->is8Bit() && s3->is8Bit()); + m_fibers[0].set(vm, this, s1); + m_fibers[1].set(vm, this, s2); + m_fibers[2].set(vm, this, s3); } - ALWAYS_INLINE JSString* jsSingleCharacterSubstring(ExecState* exec, const String& s, unsigned offset) + void finishCreation(VM& vm) { - JSGlobalData* globalData = &exec->globalData(); - ASSERT(offset < static_cast<unsigned>(s.length())); - UChar c = s.characterAt(offset); - if (c <= maxSingleCharacterString) - return globalData->smallStrings.singleCharacterString(globalData, c); - return JSString::create(*globalData, StringImpl::create(s.impl(), offset, 1)); + JSString::finishCreation(vm); } - inline JSString* jsNontrivialString(JSGlobalData* globalData, const String& s) + void append(VM& vm, size_t index, JSString* jsString) { - ASSERT(s.length() > 1); - return JSString::create(*globalData, s.impl()); + m_fibers[index].set(vm, this, jsString); + m_length += jsString->m_length; + setIs8Bit(is8Bit() && jsString->is8Bit()); } - inline const String& JSString::value(ExecState* exec) const + static JSRopeString* createNull(VM& vm) { - if (isRope()) - static_cast<const JSRopeString*>(this)->resolveRope(exec); - return m_value; + JSRopeString* newString = new (NotNull, allocateCell<JSRopeString>(vm.heap)) JSRopeString(vm); + newString->finishCreation(vm); + return newString; } - inline const String& JSString::tryGetValue() const +public: + static JSString* create(VM& vm, JSString* s1, JSString* s2) { - if (isRope()) - static_cast<const JSRopeString*>(this)->resolveRope(0); - return m_value; + JSRopeString* newString = new (NotNull, allocateCell<JSRopeString>(vm.heap)) JSRopeString(vm); + newString->finishCreation(vm, s1, s2); + return newString; } - - inline JSString* JSString::getIndex(ExecState* exec, unsigned i) + static JSString* create(VM& vm, JSString* s1, JSString* s2, JSString* s3) { - ASSERT(canGetIndex(i)); - if (isRope()) - return static_cast<JSRopeString*>(this)->getIndexSlowCase(exec, i); - ASSERT(i < m_value.length()); - return jsSingleCharacterSubstring(exec, m_value, i); + JSRopeString* newString = new (NotNull, allocateCell<JSRopeString>(vm.heap)) JSRopeString(vm); + newString->finishCreation(vm, s1, s2, s3); + return newString; } - inline JSString* jsString(JSGlobalData* globalData, const String& s) - { - int size = s.length(); - if (!size) - return globalData->smallStrings.emptyString(globalData); - if (size == 1) { - UChar c = s.characterAt(0); - if (c <= maxSingleCharacterString) - return globalData->smallStrings.singleCharacterString(globalData, c); - } - return JSString::create(*globalData, s.impl()); - } + void visitFibers(SlotVisitor&); + + static ptrdiff_t offsetOfFibers() { return OBJECT_OFFSETOF(JSRopeString, m_fibers); } - 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); - return jsSubstring(globalData, s->value(exec), offset, length); + static const unsigned s_maxInternalRopeLength = 3; + +private: + friend JSValue jsString(ExecState*, Register*, unsigned); + friend JSValue jsStringFromArguments(ExecState*, JSValue); + + JS_EXPORT_PRIVATE void resolveRope(ExecState*) const; + void resolveRopeSlowCase8(LChar*) const; + void resolveRopeSlowCase(UChar*) const; + void outOfMemory(ExecState*) const; + + JSString* getIndexSlowCase(ExecState*, unsigned); + + mutable FixedArray<WriteBarrier<JSString>, s_maxInternalRopeLength> m_fibers; +}; + +JSString* asString(JSValue); + +inline JSString* asString(JSValue value) +{ + ASSERT(value.asCell()->isString()); + return jsCast<JSString*>(value.asCell()); +} + +inline JSString* jsEmptyString(VM* vm) +{ + return vm->smallStrings.emptyString(); +} + +ALWAYS_INLINE JSString* jsSingleCharacterString(VM* vm, UChar c) +{ + if (c <= maxSingleCharacterString) + return vm->smallStrings.singleCharacterString(vm, c); + return JSString::create(*vm, String(&c, 1).impl()); +} + +ALWAYS_INLINE JSString* jsSingleCharacterSubstring(ExecState* exec, const String& s, unsigned offset) +{ + VM* vm = &exec->vm(); + ASSERT(offset < static_cast<unsigned>(s.length())); + UChar c = s.characterAt(offset); + if (c <= maxSingleCharacterString) + return vm->smallStrings.singleCharacterString(vm, c); + return JSString::create(*vm, StringImpl::create(s.impl(), offset, 1)); +} + +inline JSString* jsNontrivialString(VM* vm, const String& s) +{ + ASSERT(s.length() > 1); + return JSString::create(*vm, s.impl()); +} + +inline const String& JSString::value(ExecState* exec) const +{ + if (isRope()) + static_cast<const JSRopeString*>(this)->resolveRope(exec); + return m_value; +} + +inline const String& JSString::tryGetValue() const +{ + if (isRope()) + static_cast<const JSRopeString*>(this)->resolveRope(0); + return m_value; +} + +inline JSString* JSString::getIndex(ExecState* exec, unsigned i) +{ + ASSERT(canGetIndex(i)); + if (isRope()) + return static_cast<JSRopeString*>(this)->getIndexSlowCase(exec, i); + ASSERT(i < m_value.length()); + return jsSingleCharacterSubstring(exec, m_value, i); +} + +inline JSString* jsString(VM* vm, const String& s) +{ + int size = s.length(); + if (!size) + return vm->smallStrings.emptyString(); + if (size == 1) { + UChar c = s.characterAt(0); + if (c <= maxSingleCharacterString) + return vm->smallStrings.singleCharacterString(vm, c); } - - inline JSString* jsSubstring8(JSGlobalData* globalData, const String& 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.characterAt(offset); - if (c <= maxSingleCharacterString) - return globalData->smallStrings.singleCharacterString(globalData, c); - } - return JSString::createHasOtherOwner(*globalData, StringImpl::create8(s.impl(), offset, length)); + return JSString::create(*vm, s.impl()); +} + +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())); + VM* vm = &exec->vm(); + if (!length) + return vm->smallStrings.emptyString(); + return jsSubstring(vm, s->value(exec), offset, length); +} + +inline JSString* jsSubstring8(VM* vm, const String& 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 vm->smallStrings.emptyString(); + if (length == 1) { + UChar c = s.characterAt(offset); + if (c <= maxSingleCharacterString) + return vm->smallStrings.singleCharacterString(vm, c); } - - inline JSString* jsSubstring(JSGlobalData* globalData, const String& 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.characterAt(offset); - if (c <= maxSingleCharacterString) - return globalData->smallStrings.singleCharacterString(globalData, c); - } - return JSString::createHasOtherOwner(*globalData, StringImpl::create(s.impl(), offset, length)); + return JSString::createHasOtherOwner(*vm, StringImpl::create8(s.impl(), offset, length)); +} + +inline JSString* jsSubstring(VM* vm, const String& 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 vm->smallStrings.emptyString(); + if (length == 1) { + UChar c = s.characterAt(offset); + if (c <= maxSingleCharacterString) + return vm->smallStrings.singleCharacterString(vm, c); } - - inline JSString* jsOwnedString(JSGlobalData* globalData, const String& s) - { - int size = s.length(); - if (!size) - return globalData->smallStrings.emptyString(globalData); - if (size == 1) { - UChar c = s.characterAt(0); - if (c <= maxSingleCharacterString) - return globalData->smallStrings.singleCharacterString(globalData, c); - } - return JSString::createHasOtherOwner(*globalData, s.impl()); + return JSString::createHasOtherOwner(*vm, StringImpl::create(s.impl(), offset, length)); +} + +inline JSString* jsOwnedString(VM* vm, const String& s) +{ + int size = s.length(); + if (!size) + return vm->smallStrings.emptyString(); + if (size == 1) { + UChar c = s.characterAt(0); + if (c <= maxSingleCharacterString) + return vm->smallStrings.singleCharacterString(vm, c); } - - inline JSRopeString* jsStringBuilder(JSGlobalData* globalData) - { - return JSRopeString::createNull(*globalData); + return JSString::createHasOtherOwner(*vm, s.impl()); +} + +inline JSRopeString* jsStringBuilder(VM* vm) +{ + return JSRopeString::createNull(*vm); +} + +inline JSString* jsEmptyString(ExecState* exec) { return jsEmptyString(&exec->vm()); } +inline JSString* jsString(ExecState* exec, const String& s) { return jsString(&exec->vm(), s); } +inline JSString* jsSingleCharacterString(ExecState* exec, UChar c) { return jsSingleCharacterString(&exec->vm(), c); } +inline JSString* jsSubstring8(ExecState* exec, const String& s, unsigned offset, unsigned length) { return jsSubstring8(&exec->vm(), s, offset, length); } +inline JSString* jsSubstring(ExecState* exec, const String& s, unsigned offset, unsigned length) { return jsSubstring(&exec->vm(), s, offset, length); } +inline JSString* jsNontrivialString(ExecState* exec, const String& s) { return jsNontrivialString(&exec->vm(), s); } +inline JSString* jsOwnedString(ExecState* exec, const String& s) { return jsOwnedString(&exec->vm(), s); } + +ALWAYS_INLINE bool JSString::getStringPropertySlot(ExecState* exec, PropertyName propertyName, PropertySlot& slot) +{ + if (propertyName == exec->propertyNames().length) { + slot.setValue(jsNumber(m_length)); + return true; } - inline JSString* jsEmptyString(ExecState* exec) { return jsEmptyString(&exec->globalData()); } - inline JSString* jsString(ExecState* exec, const String& s) { return jsString(&exec->globalData(), s); } - inline JSString* jsSingleCharacterString(ExecState* exec, UChar c) { return jsSingleCharacterString(&exec->globalData(), c); } - inline JSString* jsSubstring8(ExecState* exec, const String& s, unsigned offset, unsigned length) { return jsSubstring8(&exec->globalData(), s, offset, length); } - inline JSString* jsSubstring(ExecState* exec, const String& s, unsigned offset, unsigned length) { return jsSubstring(&exec->globalData(), s, offset, length); } - inline JSString* jsNontrivialString(ExecState* exec, const String& s) { return jsNontrivialString(&exec->globalData(), s); } - inline JSString* jsOwnedString(ExecState* exec, const String& s) { return jsOwnedString(&exec->globalData(), s); } - - ALWAYS_INLINE bool JSString::getStringPropertySlot(ExecState* exec, PropertyName propertyName, PropertySlot& slot) - { - if (propertyName == exec->propertyNames().length) { - slot.setValue(jsNumber(m_length)); - return true; - } - - unsigned i = propertyName.asIndex(); - if (i < m_length) { - ASSERT(i != PropertyName::NotAnIndex); // No need for an explicit check, the above test would always fail! - slot.setValue(getIndex(exec, i)); - return true; - } - - return false; + unsigned i = propertyName.asIndex(); + if (i < m_length) { + ASSERT(i != PropertyName::NotAnIndex); // No need for an explicit check, the above test would always fail! + slot.setValue(getIndex(exec, i)); + return true; } - - ALWAYS_INLINE bool JSString::getStringPropertySlot(ExecState* exec, unsigned propertyName, PropertySlot& slot) - { - if (propertyName < m_length) { - slot.setValue(getIndex(exec, propertyName)); - return true; - } - return false; + return false; +} + +ALWAYS_INLINE bool JSString::getStringPropertySlot(ExecState* exec, unsigned propertyName, PropertySlot& slot) +{ + if (propertyName < m_length) { + slot.setValue(getIndex(exec, propertyName)); + return true; } - inline bool isJSString(JSValue v) { return v.isCell() && v.asCell()->classInfo() == &JSString::s_info; } + return false; +} - inline bool JSCell::toBoolean(ExecState* exec) const - { - if (isString()) - return static_cast<const JSString*>(this)->toBoolean(); - return !structure()->masqueradesAsUndefined(exec->lexicalGlobalObject()); - } +inline bool isJSString(JSValue v) { return v.isCell() && v.asCell()->classInfo() == &JSString::s_info; } - // --- JSValue inlines ---------------------------- +// --- JSValue inlines ---------------------------- - inline bool JSValue::toBoolean(ExecState* exec) const - { - if (isInt32()) - return asInt32(); - if (isDouble()) - return asDouble() > 0.0 || asDouble() < 0.0; // false for NaN - if (isCell()) - return asCell()->toBoolean(exec); - return isTrue(); // false, null, and undefined all convert to false. - } - - inline JSString* JSValue::toString(ExecState* exec) const - { - if (isString()) - return jsCast<JSString*>(asCell()); - return toStringSlowCase(exec); - } - - inline String JSValue::toWTFString(ExecState* exec) const - { - if (isString()) - return static_cast<JSString*>(asCell())->value(exec); - return toWTFStringSlowCase(exec); - } - - ALWAYS_INLINE String inlineJSValueNotStringtoString(const JSValue& value, ExecState* exec) - { - JSGlobalData& globalData = exec->globalData(); - if (value.isInt32()) - return globalData.numericStrings.add(value.asInt32()); - if (value.isDouble()) - return globalData.numericStrings.add(value.asDouble()); - if (value.isTrue()) - return globalData.propertyNames->trueKeyword.string(); - if (value.isFalse()) - return globalData.propertyNames->falseKeyword.string(); - if (value.isNull()) - return globalData.propertyNames->nullKeyword.string(); - if (value.isUndefined()) - return globalData.propertyNames->undefinedKeyword.string(); - return value.toString(exec)->value(exec); - } - - ALWAYS_INLINE String JSValue::toWTFStringInline(ExecState* exec) const - { - if (isString()) - return static_cast<JSString*>(asCell())->value(exec); - - return inlineJSValueNotStringtoString(*this, exec); - } +inline bool JSValue::toBoolean(ExecState* exec) const +{ + if (isInt32()) + return asInt32(); + if (isDouble()) + return asDouble() > 0.0 || asDouble() < 0.0; // false for NaN + if (isCell()) + return asCell()->toBoolean(exec); + return isTrue(); // false, null, and undefined all convert to false. +} + +inline JSString* JSValue::toString(ExecState* exec) const +{ + if (isString()) + return jsCast<JSString*>(asCell()); + return toStringSlowCase(exec); +} + +inline String JSValue::toWTFString(ExecState* exec) const +{ + if (isString()) + return static_cast<JSString*>(asCell())->value(exec); + return toWTFStringSlowCase(exec); +} + +ALWAYS_INLINE String inlineJSValueNotStringtoString(const JSValue& value, ExecState* exec) +{ + VM& vm = exec->vm(); + if (value.isInt32()) + return vm.numericStrings.add(value.asInt32()); + if (value.isDouble()) + return vm.numericStrings.add(value.asDouble()); + if (value.isTrue()) + return vm.propertyNames->trueKeyword.string(); + if (value.isFalse()) + return vm.propertyNames->falseKeyword.string(); + if (value.isNull()) + return vm.propertyNames->nullKeyword.string(); + if (value.isUndefined()) + return vm.propertyNames->undefinedKeyword.string(); + return value.toString(exec)->value(exec); +} + +ALWAYS_INLINE String JSValue::toWTFStringInline(ExecState* exec) const +{ + if (isString()) + return static_cast<JSString*>(asCell())->value(exec); + + return inlineJSValueNotStringtoString(*this, exec); +} } // namespace JSC |