Modified: trunk/Source/_javascript_Core/runtime/JSString.h (146406 => 146407)
--- trunk/Source/_javascript_Core/runtime/JSString.h 2013-03-20 23:04:44 UTC (rev 146406)
+++ trunk/Source/_javascript_Core/runtime/JSString.h 2013-03-20 23:16:01 UTC (rev 146407)
@@ -31,523 +31,523 @@
namespace JSC {
- class JSString;
- class JSRopeString;
- class LLIntOffsetsExtractor;
+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* 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);
+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&);
+// 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&);
+// 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*);
+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;
+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;
+ typedef JSCell Base;
- static const bool needsDestruction = true;
- static const bool hasImmortalStructure = true;
- static void destroy(JSCell*);
+ 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)
- {
- }
+private:
+ JSString(JSGlobalData& globalData, PassRefPtr<StringImpl> value)
+ : JSCell(globalData, globalData.stringStructure.get())
+ , m_flags(0)
+ , m_value(value)
+ {
+ }
- JSString(JSGlobalData& globalData)
- : JSCell(globalData, globalData.stringStructure.get())
- , m_flags(0)
- {
- }
+ JSString(JSGlobalData& globalData)
+ : JSCell(globalData, globalData.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_newStringsSinceLastHashCons++;
- }
+ void finishCreation(JSGlobalData& globalData, size_t length)
+ {
+ ASSERT(!m_value.isNull());
+ Base::finishCreation(globalData);
+ m_length = length;
+ setIs8Bit(m_value.impl()->is8Bit());
+ globalData.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_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_newStringsSinceLastHashCons++;
+ }
- protected:
- void finishCreation(JSGlobalData& globalData)
- {
- Base::finishCreation(globalData);
- m_length = 0;
- setIs8Bit(true);
- globalData.m_newStringsSinceLastHashCons++;
- }
+protected:
+ void finishCreation(JSGlobalData& globalData)
+ {
+ Base::finishCreation(globalData);
+ m_length = 0;
+ setIs8Bit(true);
+ globalData.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(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;
+ }
- 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(JSGlobalData& globalData, JSGlobalObject* globalObject, JSValue proto)
+ {
+ return Structure::create(globalData, globalObject, proto, TypeInfo(StringType, OverridesGetOwnPropertySlot | InterceptsGetOwnPropertySlotByIndexEvenWhenLengthIsNotZero), &s_info);
+ }
- 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 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&);
- enum {
- HashConsLock = 1u << 2,
- IsHashConsSingleton = 1u << 1,
- Is8Bit = 1u
- };
+ enum {
+ HashConsLock = 1u << 2,
+ IsHashConsSingleton = 1u << 1,
+ Is8Bit = 1u
+ };
- protected:
- friend class JSValue;
+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();
+ 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;
+ unsigned m_flags;
- // A string is represented either by a String or a rope of fibers.
- unsigned m_length;
- mutable String m_value;
+ // 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(JSGlobalData*);
- class RopeBuilder {
- public:
- RopeBuilder(JSGlobalData& globalData)
+ class RopeBuilder {
+ public:
+ RopeBuilder(JSGlobalData& globalData)
: m_globalData(globalData)
, m_jsString(jsStringBuilder(&globalData))
, 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)
+ void append(JSString* jsString)
{
- 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);
+ if (m_index == JSRopeString::s_maxInternalRopeLength)
+ expand();
+ m_jsString->append(m_globalData, m_index++, jsString);
}
-
- 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)
+ JSRopeString* release()
{
- JSString::finishCreation(globalData);
+ JSRopeString* tmp = m_jsString;
+ m_jsString = 0;
+ return tmp;
}
- 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());
- }
+ unsigned length() { return m_jsString->m_length; }
- 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* newString = new (NotNull, allocateCell<JSRopeString>(globalData.heap)) JSRopeString(globalData);
- newString->finishCreation(globalData, s1, s2, s3);
- return newString;
- }
-
- void visitFibers(SlotVisitor&);
-
- static ptrdiff_t offsetOfFibers() { return OBJECT_OFFSETOF(JSRopeString, m_fibers); }
-
- 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;
+ void expand();
+
+ JSGlobalData& m_globalData;
+ JSRopeString* m_jsString;
+ size_t m_index;
+ };
- JSString* getIndexSlowCase(ExecState*, unsigned);
-
- mutable FixedArray<WriteBarrier<JSString>, s_maxInternalRopeLength> m_fibers;
- };
-
- JSString* asString(JSValue);
-
- inline JSString* asString(JSValue value)
+private:
+ JSRopeString(JSGlobalData& globalData)
+ : JSString(globalData)
{
- ASSERT(value.asCell()->isString());
- return jsCast<JSString*>(value.asCell());
}
- inline JSString* jsEmptyString(JSGlobalData* globalData)
+ void finishCreation(JSGlobalData& globalData, JSString* s1, JSString* s2)
{
- return globalData->smallStrings.emptyString();
+ 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);
}
-
- ALWAYS_INLINE JSString* jsSingleCharacterString(JSGlobalData* globalData, UChar c)
+
+ void finishCreation(JSGlobalData& globalData, 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(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);
}
- ALWAYS_INLINE JSString* jsSingleCharacterSubstring(ExecState* exec, const String& s, unsigned offset)
+ void finishCreation(JSGlobalData& globalData)
{
- 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(globalData);
}
- inline JSString* jsNontrivialString(JSGlobalData* globalData, const String& s)
+ void append(JSGlobalData& globalData, size_t index, JSString* jsString)
{
- ASSERT(s.length() > 1);
- return JSString::create(*globalData, s.impl());
+ m_fibers[index].set(globalData, this, jsString);
+ m_length += jsString->m_length;
+ setIs8Bit(is8Bit() && jsString->is8Bit());
}
- inline const String& JSString::value(ExecState* exec) const
+ static JSRopeString* createNull(JSGlobalData& globalData)
{
- if (isRope())
- static_cast<const JSRopeString*>(this)->resolveRope(exec);
- return m_value;
+ JSRopeString* newString = new (NotNull, allocateCell<JSRopeString>(globalData.heap)) JSRopeString(globalData);
+ newString->finishCreation(globalData);
+ return newString;
}
- inline const String& JSString::tryGetValue() const
+public:
+ static JSString* create(JSGlobalData& globalData, JSString* s1, JSString* s2)
{
- if (isRope())
- static_cast<const JSRopeString*>(this)->resolveRope(0);
- return m_value;
+ JSRopeString* newString = new (NotNull, allocateCell<JSRopeString>(globalData.heap)) JSRopeString(globalData);
+ newString->finishCreation(globalData, s1, s2);
+ return newString;
}
-
- inline JSString* JSString::getIndex(ExecState* exec, unsigned i)
+ static JSString* create(JSGlobalData& globalData, 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>(globalData.heap)) JSRopeString(globalData);
+ newString->finishCreation(globalData, s1, s2, s3);
+ return newString;
}
- inline JSString* jsString(JSGlobalData* globalData, const String& s)
- {
- int size = s.length();
- if (!size)
- return globalData->smallStrings.emptyString();
- 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();
- 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);
- 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();
- 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));
+ 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(JSGlobalData* globalData)
+{
+ return globalData->smallStrings.emptyString();
+}
+
+ALWAYS_INLINE JSString* jsSingleCharacterString(JSGlobalData* globalData, UChar c)
+{
+ if (c <= maxSingleCharacterString)
+ return globalData->smallStrings.singleCharacterString(globalData, c);
+ return JSString::create(*globalData, String(&c, 1).impl());
+}
+
+ALWAYS_INLINE JSString* jsSingleCharacterSubstring(ExecState* exec, const String& s, unsigned offset)
+{
+ 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));
+}
+
+inline JSString* jsNontrivialString(JSGlobalData* globalData, const String& s)
+{
+ ASSERT(s.length() > 1);
+ return JSString::create(*globalData, 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(JSGlobalData* globalData, const String& s)
+{
+ int size = s.length();
+ if (!size)
+ return globalData->smallStrings.emptyString();
+ if (size == 1) {
+ UChar c = s.characterAt(0);
+ if (c <= maxSingleCharacterString)
+ return globalData->smallStrings.singleCharacterString(globalData, c);
}
+ return JSString::create(*globalData, s.impl());
+}
- 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();
- 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));
+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();
+ return jsSubstring(globalData, s->value(exec), offset, length);
+}
+
+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();
+ 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));
+}
- inline JSString* jsOwnedString(JSGlobalData* globalData, const String& s)
- {
- int size = s.length();
- if (!size)
- return globalData->smallStrings.emptyString();
- if (size == 1) {
- UChar c = s.characterAt(0);
- if (c <= maxSingleCharacterString)
- return globalData->smallStrings.singleCharacterString(globalData, c);
- }
- return JSString::createHasOtherOwner(*globalData, s.impl());
+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();
+ 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));
+}
- inline JSRopeString* jsStringBuilder(JSGlobalData* globalData)
- {
- return JSRopeString::createNull(*globalData);
+inline JSString* jsOwnedString(JSGlobalData* globalData, const String& s)
+{
+ int size = s.length();
+ if (!size)
+ return globalData->smallStrings.emptyString();
+ if (size == 1) {
+ UChar c = s.characterAt(0);
+ if (c <= maxSingleCharacterString)
+ return globalData->smallStrings.singleCharacterString(globalData, c);
}
+ return JSString::createHasOtherOwner(*globalData, s.impl());
+}
- 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); }
+inline JSRopeString* jsStringBuilder(JSGlobalData* globalData)
+{
+ return JSRopeString::createNull(*globalData);
+}
- 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); }
- 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, PropertyName propertyName, PropertySlot& slot)
+{
+ if (propertyName == exec->propertyNames().length) {
+ slot.setValue(jsNumber(m_length));
+ 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;
}
+
+ 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;
+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;
+}
- // --- JSValue inlines ----------------------------
+inline bool isJSString(JSValue v) { return v.isCell() && v.asCell()->classInfo() == &JSString::s_info; }
+
+// --- 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 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 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);
- }
+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 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);
+ALWAYS_INLINE String JSValue::toWTFStringInline(ExecState* exec) const
+{
+ if (isString())
+ return static_cast<JSString*>(asCell())->value(exec);
- return inlineJSValueNotStringtoString(*this, exec);
- }
+ return inlineJSValueNotStringtoString(*this, exec);
+}
} // namespace JSC
