#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;
+ class JSRopeString;
+ class LLIntOffsetsExtractor;
JSString* jsEmptyString(JSGlobalData*);
JSString* jsEmptyString(ExecState*);
JSString* jsOwnedString(JSGlobalData*, const UString&);
JSString* jsOwnedString(ExecState*, const UString&);
- class JS_EXPORTCLASS JSString : public JSCell {
+ JSRopeString* jsStringBuilder(JSGlobalData*);
+
+ class JSString : public JSCell {
public:
friend class JIT;
friend class JSGlobalData;
friend class SpecializedThunkJIT;
+ friend class JSRopeString;
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_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(); }
+ typedef JSCell Base;
- private:
- unsigned m_index;
- RefPtr<RopeImpl> m_rope;
- };
+ static void destroy(JSCell*);
- 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())
+ private:
+ JSString(JSGlobalData& globalData, PassRefPtr<StringImpl> value)
+ : JSCell(globalData, globalData.stringStructure.get())
, 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)
+ JSString(JSGlobalData& globalData)
+ : JSCell(globalData, globalData.stringStructure.get())
{
- 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_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)
+ void finishCreation(JSGlobalData& globalData, size_t length)
{
- unsigned index = 0;
- appendStringInConstruct(index, u1);
- appendStringInConstruct(index, u2);
- ASSERT(index <= s_maxInternalRopeLength);
+ ASSERT(!m_value.isNull());
+ Base::finishCreation(globalData);
+ m_length = length;
+ m_is8Bit = m_value.impl()->is8Bit();
}
- // 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)
+ void finishCreation(JSGlobalData& globalData, size_t length, size_t cost)
{
- unsigned index = 0;
- appendStringInConstruct(index, u1);
- appendStringInConstruct(index, u2);
- appendStringInConstruct(index, u3);
- ASSERT(index <= s_maxInternalRopeLength);
+ ASSERT(!m_value.isNull());
+ Base::finishCreation(globalData);
+ m_length = length;
+ m_is8Bit = m_value.impl()->is8Bit();
+ Heap::heap(this)->reportExtraMemoryCost(cost);
}
- ~JSString()
+ protected:
+ void finishCreation(JSGlobalData& globalData)
{
- ASSERT(vptr() == JSGlobalData::jsStringVPtr);
- for (unsigned i = 0; i < m_fiberCount; ++i)
- RopeImpl::deref(m_fibers[i]);
+ Base::finishCreation(globalData);
+ m_length = 0;
+ m_is8Bit = true;
}
-
- const UString& value(ExecState* exec) const
+
+ public:
+ static JSString* create(JSGlobalData& globalData, PassRefPtr<StringImpl> value)
{
- if (isRope())
- resolveRope(exec);
- return m_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;
}
- const UString& tryGetValue() const
+ static JSString* createHasOtherOwner(JSGlobalData& globalData, PassRefPtr<StringImpl> value)
{
- if (isRope())
- resolveRope(0);
- return m_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 UString& value(ExecState*) const;
+ const UString& tryGetValue() const;
unsigned length() { return m_length; }
+ JSValue toPrimitive(ExecState*, PreferredPrimitiveType) const;
+ JS_EXPORT_PRIVATE bool toBoolean(ExecState*) const;
+ bool getPrimitiveNumber(ExecState*, double& number, JSValue&) const;
+ JSObject* toObject(ExecState*, JSGlobalObject*) const;
+ double toNumber(ExecState*) const;
+
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)
+ static Structure* createStructure(JSGlobalData& globalData, JSGlobalObject* globalObject, JSValue proto)
{
- return Structure::create(globalData, proto, TypeInfo(StringType, OverridesGetOwnPropertySlot | NeedsThisConversion), AnonymousSlotCount, &s_info);
+ return Structure::create(globalData, globalObject, proto, TypeInfo(StringType, OverridesGetOwnPropertySlot), &s_info);
}
+
+ static size_t offsetOfLength() { return OBJECT_OFFSETOF(JSString, m_length); }
+ static size_t offsetOfValue() { return OBJECT_OFFSETOF(JSString, m_value); }
+
+ static JS_EXPORTDATA const ClassInfo s_info;
+
+ static void visitChildren(JSCell*, SlotVisitor&);
+
+ protected:
+ bool isRope() const { return m_value.isNull(); }
+ bool is8Bit() const { return m_is8Bit; }
+
+ // A string is represented either by a UString or a rope of fibers.
+ bool m_is8Bit : 1;
+ unsigned m_length;
+ mutable UString m_value;
+
+ private:
+ friend class LLIntOffsetsExtractor;
- static const ClassInfo s_info;
+ static JSObject* toThisObject(JSCell*, ExecState*);
+
+ // Actually getPropertySlot, not getOwnPropertySlot (see JSCell).
+ static bool getOwnPropertySlot(JSCell*, ExecState*, const Identifier& propertyName, PropertySlot&);
+ static bool getOwnPropertySlotByIndex(JSCell*, ExecState*, unsigned propertyName, PropertySlot&);
+
+ UString& string() { ASSERT(!isRope()); return m_value; }
+
+ friend JSValue jsString(ExecState*, JSString*, JSString*);
+ friend JSString* jsSubstring(ExecState*, JSString*, unsigned offset, unsigned length);
+ };
+
+ class JSRopeString : public JSString {
+ friend class JSString;
+ friend JSRopeString* jsStringBuilder(JSGlobalData*);
+
+ 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->m_fibers[m_index++].set(m_globalData, m_jsString, jsString);
+ m_jsString->m_length += jsString->m_length;
+ m_jsString->m_is8Bit = m_jsString->m_is8Bit && jsString->m_is8Bit;
+ }
+
+ 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:
- JSString(VPtrStealingHackType)
- : JSCell(VPtrStealingHack)
- , m_fiberCount(0)
+ JSRopeString(JSGlobalData& globalData)
+ : JSString(globalData)
{
}
- void resolveRope(ExecState*) const;
- void resolveRopeSlowCase(ExecState*, UChar*) const;
- void outOfMemory(ExecState*) const;
- JSString* substringFromRope(ExecState*, unsigned offset, unsigned length);
+ void finishCreation(JSGlobalData& globalData, JSString* s1, JSString* s2)
+ {
+ Base::finishCreation(globalData);
+ m_length = s1->length() + s2->length();
+ m_is8Bit = (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();
+ m_is8Bit = (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 appendStringInConstruct(unsigned& index, const UString& string)
+ void finishCreation(JSGlobalData& globalData)
{
- StringImpl* impl = string.impl();
- impl->ref();
- m_fibers[index++] = impl;
+ JSString::finishCreation(globalData);
}
- void appendStringInConstruct(unsigned& index, JSString* jsString)
+ static JSRopeString* createNull(JSGlobalData& globalData)
{
- if (jsString->isRope()) {
- for (unsigned i = 0; i < jsString->m_fiberCount; ++i) {
- RopeImpl::Fiber fiber = jsString->m_fibers[i];
- fiber->ref();
- m_fibers[index++] = fiber;
- }
- } else
- appendStringInConstruct(index, jsString->string());
+ JSRopeString* newString = new (NotNull, allocateCell<JSRopeString>(globalData.heap)) JSRopeString(globalData);
+ newString->finishCreation(globalData);
+ return newString;
}
- void appendValueInConstructAndIncrementLength(ExecState* exec, unsigned& index, JSValue v)
+ public:
+ static JSString* create(JSGlobalData& globalData, JSString* s1, JSString* s2)
{
- 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_fibers[index++] = impl;
- m_length += u.length();
- }
+ 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;
}
- 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;
+ void visitFibers(SlotVisitor&);
- virtual JSObject* toThisObject(ExecState*) const;
+ private:
+ friend JSValue jsString(ExecState*, Register*, unsigned);
+ friend JSValue jsStringFromArguments(ExecState*, JSValue);
- // 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&);
+ 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;
-
- // A string is represented either by a UString or a RopeImpl.
- unsigned m_length;
- mutable UString m_value;
- mutable unsigned m_fiberCount;
- mutable FixedArray<RopeImpl::Fiber, s_maxInternalRopeLength> m_fibers;
-
- 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* jsSubstring(ExecState* exec, JSString* s, unsigned offset, unsigned length);
+
+ mutable FixedArray<WriteBarrier<JSString>, s_maxInternalRopeLength> m_fibers;
};
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());
+ return jsCast<JSString*>(value.asCell());
}
inline JSString* jsEmptyString(JSGlobalData* globalData)
return globalData->smallStrings.emptyString(globalData);
}
- inline JSString* jsSingleCharacterString(JSGlobalData* globalData, UChar c)
+ ALWAYS_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)));
+ return JSString::create(*globalData, UString(&c, 1).impl());
}
- inline JSString* jsSingleCharacterSubstring(ExecState* exec, const UString& s, unsigned offset)
+ ALWAYS_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];
+ UChar c = s[offset];
if (c <= maxSingleCharacterString)
return globalData->smallStrings.singleCharacterString(globalData, c);
- return fixupVPtr(globalData, new (globalData) JSString(globalData, UString(StringImpl::create(s.impl(), offset, 1))));
+ return JSString::create(*globalData, 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));
+ return JSString::create(*globalData, UString(s).impl());
}
inline JSString* jsNontrivialString(JSGlobalData* globalData, const UString& s)
{
ASSERT(s.length() > 1);
- return fixupVPtr(globalData, new (globalData) JSString(globalData, s));
+ return JSString::create(*globalData, s.impl());
+ }
+
+ inline const UString& JSString::value(ExecState* exec) const
+ {
+ if (isRope())
+ static_cast<const JSRopeString*>(this)->resolveRope(exec);
+ return m_value;
+ }
+
+ inline const UString& 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 getIndexSlowCase(exec, i);
+ return static_cast<JSRopeString*>(this)->getIndexSlowCase(exec, i);
ASSERT(i < m_value.length());
return jsSingleCharacterSubstring(exec, m_value, i);
}
if (!size)
return globalData->smallStrings.emptyString(globalData);
if (size == 1) {
- UChar c = s.characters()[0];
+ UChar c = s[0];
if (c <= maxSingleCharacterString)
return globalData->smallStrings.singleCharacterString(globalData, c);
}
- return fixupVPtr(globalData, new (globalData) JSString(globalData, s));
+ return JSString::create(*globalData, s.impl());
}
inline JSString* jsSubstring(ExecState* exec, JSString* s, unsigned offset, unsigned 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);
+ return jsSubstring(globalData, s->value(exec), offset, length);
+ }
+
+ inline JSString* jsSubstring8(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[offset];
+ if (c <= maxSingleCharacterString)
+ return globalData->smallStrings.singleCharacterString(globalData, c);
+ }
+ return JSString::createHasOtherOwner(*globalData, StringImpl::create8(s.impl(), offset, length));
}
inline JSString* jsSubstring(JSGlobalData* globalData, const UString& s, unsigned offset, unsigned length)
if (!length)
return globalData->smallStrings.emptyString(globalData);
if (length == 1) {
- UChar c = s.characters()[offset];
+ UChar c = s[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));
+ return JSString::createHasOtherOwner(*globalData, StringImpl::create(s.impl(), offset, length));
}
inline JSString* jsOwnedString(JSGlobalData* globalData, const UString& s)
if (!size)
return globalData->smallStrings.emptyString(globalData);
if (size == 1) {
- UChar c = s.characters()[0];
+ UChar c = s[0];
if (c <= maxSingleCharacterString)
return globalData->smallStrings.singleCharacterString(globalData, c);
}
- return fixupVPtr(globalData, new (globalData) JSString(globalData, s, JSString::HasOtherOwner));
+ return JSString::createHasOtherOwner(*globalData, s.impl());
+ }
+
+ inline JSRopeString* jsStringBuilder(JSGlobalData* globalData)
+ {
+ return JSRopeString::createNull(*globalData);
}
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* jsSubstring8(ExecState* exec, const UString& s, unsigned offset, unsigned length) { return jsSubstring8(&exec->globalData(), s, offset, length); }
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); }
return false;
}
- inline bool isJSString(JSGlobalData* globalData, JSValue v) { return v.isCell() && v.asCell()->vptr() == globalData->jsStringVPtr; }
+ inline bool isJSString(JSValue v) { return v.isCell() && v.asCell()->classInfo() == &JSString::s_info; }
+
+ inline bool JSCell::toBoolean(ExecState* exec) const
+ {
+ if (isString())
+ return static_cast<const JSString*>(this)->toBoolean(exec);
+ return !structure()->typeInfo().masqueradesAsUndefined();
+ }
// --- 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 UString JSValue::toString(ExecState* exec) const
+ inline JSString* JSValue::toString(ExecState* exec) const
+ {
+ if (isString())
+ return jsCast<JSString*>(asCell());
+ return toStringSlowCase(exec);
+ }
+
+ inline UString JSValue::toUString(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);
+ return toUStringSlowCase(exec);
}
- inline UString JSValue::toPrimitiveString(ExecState* exec) const
+ ALWAYS_INLINE UString inlineJSValueNotStringtoUString(const JSValue& value, ExecState* exec)
{
- 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);
+ 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.ustring();
+ if (value.isFalse())
+ return globalData.propertyNames->falseKeyword.ustring();
+ if (value.isNull())
+ return globalData.propertyNames->nullKeyword.ustring();
+ if (value.isUndefined())
+ return globalData.propertyNames->undefinedKeyword.ustring();
+ return value.toString(exec)->value(exec);
+ }
+
+ ALWAYS_INLINE UString JSValue::toUStringInline(ExecState* exec) const
+ {
+ if (isString())
+ return static_cast<JSString*>(asCell())->value(exec);
+
+ return inlineJSValueNotStringtoUString(*this, exec);
}
} // namespace JSC
projects / apple / javascriptcore.git / blobdiff