webkitgtk-2.4.11webkitgtk-2.4.11

1 files changed, 163 insertions, 22 deletions

diff --git a/Source/JavaScriptCore/runtime/RegExpObject.cpp b/Source/JavaScriptCore/runtime/RegExpObject.cpp
index d61ec74e9..f3b376c0d 100644
--- a/Source/JavaScriptCore/runtime/RegExpObject.cpp
+++ b/Source/JavaScriptCore/runtime/RegExpObject.cpp
@@ -28,18 +28,40 @@
 #include "JSArray.h"
 #include "JSGlobalObject.h"
 #include "JSString.h"
+#include "Lexer.h"
 #include "Lookup.h"
-#include "JSCInlines.h"
+#include "Operations.h"
 #include "RegExpConstructor.h"
 #include "RegExpMatchesArray.h"
 #include "RegExpPrototype.h"
+#include <wtf/PassOwnPtr.h>
 #include <wtf/text/StringBuilder.h>
 
 namespace JSC {
 
+static EncodedJSValue regExpObjectGlobal(ExecState*, EncodedJSValue, EncodedJSValue, PropertyName);
+static EncodedJSValue regExpObjectIgnoreCase(ExecState*, EncodedJSValue, EncodedJSValue, PropertyName);
+static EncodedJSValue regExpObjectMultiline(ExecState*, EncodedJSValue, EncodedJSValue, PropertyName);
+static EncodedJSValue regExpObjectSource(ExecState*, EncodedJSValue, EncodedJSValue, PropertyName);
+
+} // namespace JSC
+
+#include "RegExpObject.lut.h"
+
+namespace JSC {
+
 STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(RegExpObject);
 
-const ClassInfo RegExpObject::s_info = { "RegExp", &Base::s_info, nullptr, CREATE_METHOD_TABLE(RegExpObject) };
+const ClassInfo RegExpObject::s_info = { "RegExp", &Base::s_info, 0, ExecState::regExpTable, CREATE_METHOD_TABLE(RegExpObject) };
+
+/* Source for RegExpObject.lut.h
+@begin regExpTable
+    global        regExpObjectGlobal       DontDelete|ReadOnly|DontEnum
+    ignoreCase    regExpObjectIgnoreCase   DontDelete|ReadOnly|DontEnum
+    multiline     regExpObjectMultiline    DontDelete|ReadOnly|DontEnum
+    source        regExpObjectSource       DontDelete|ReadOnly|DontEnum
+@end
+*/
 
 RegExpObject::RegExpObject(VM& vm, Structure* structure, RegExp* regExp)
     : JSNonFinalObject(vm, structure)
@@ -59,6 +81,9 @@ void RegExpObject::visitChildren(JSCell* cell, SlotVisitor& visitor)
 {
     RegExpObject* thisObject = jsCast<RegExpObject*>(cell);
     ASSERT_GC_OBJECT_INHERITS(thisObject, info());
+    COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);
+    ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren());
+
     Base::visitChildren(thisObject, visitor);
     visitor.append(&thisObject->m_regExp);
     visitor.append(&thisObject->m_lastIndex);
@@ -72,7 +97,7 @@ bool RegExpObject::getOwnPropertySlot(JSObject* object, ExecState* exec, Propert
         slot.setValue(regExp, attributes, regExp->getLastIndex());
         return true;
     }
-    return Base::getOwnPropertySlot(object, exec, propertyName, slot);
+    return getStaticValueSlot<RegExpObject, JSObject>(exec, ExecState::regExpTable(exec->vm()), jsCast<RegExpObject*>(object), propertyName, slot);
 }
 
 bool RegExpObject::deleteProperty(JSCell* cell, ExecState* exec, PropertyName propertyName)
@@ -84,25 +109,18 @@ bool RegExpObject::deleteProperty(JSCell* cell, ExecState* exec, PropertyName pr
 
 void RegExpObject::getOwnNonIndexPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
 {
-    if (mode.includeDontEnumProperties())
+    if (mode == IncludeDontEnumProperties)
         propertyNames.add(exec->propertyNames().lastIndex);
     Base::getOwnNonIndexPropertyNames(object, exec, propertyNames, mode);
 }
 
 void RegExpObject::getPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
 {
-    if (mode.includeDontEnumProperties())
+    if (mode == IncludeDontEnumProperties)
         propertyNames.add(exec->propertyNames().lastIndex);
     Base::getPropertyNames(object, exec, propertyNames, mode);
 }
 
-void RegExpObject::getGenericPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
-{
-    if (mode.includeDontEnumProperties())
-        propertyNames.add(exec->propertyNames().lastIndex);
-    Base::getGenericPropertyNames(object, exec, propertyNames, mode);
-}
-
 static bool reject(ExecState* exec, bool throwException, const char* message)
 {
     if (throwException)
@@ -127,33 +145,156 @@ bool RegExpObject::defineOwnProperty(JSObject* object, ExecState* exec, Property
                 return reject(exec, shouldThrow, "Attempting to change value of a readonly property.");
             return true;
         }
-        if (descriptor.value())
-            regExp->setLastIndex(exec, descriptor.value(), false);
         if (descriptor.writablePresent() && !descriptor.writable())
             regExp->m_lastIndexIsWritable = false;
+        if (descriptor.value())
+            regExp->setLastIndex(exec, descriptor.value(), false);
         return true;
     }
 
     return Base::defineOwnProperty(object, exec, propertyName, descriptor, shouldThrow);
 }
 
-static void regExpObjectSetLastIndexStrict(ExecState* exec, EncodedJSValue thisValue, EncodedJSValue value)
+static inline RegExpObject* asRegExpObject(EncodedJSValue value)
+{
+    return jsCast<RegExpObject*>(JSValue::decode(value));
+}
+
+EncodedJSValue regExpObjectGlobal(ExecState*, EncodedJSValue slotBase, EncodedJSValue, PropertyName)
+{
+    return JSValue::encode(jsBoolean(asRegExpObject(slotBase)->regExp()->global()));
+}
+
+EncodedJSValue regExpObjectIgnoreCase(ExecState*, EncodedJSValue slotBase, EncodedJSValue, PropertyName)
+{
+    return JSValue::encode(jsBoolean(asRegExpObject(slotBase)->regExp()->ignoreCase()));
+}
+ 
+EncodedJSValue regExpObjectMultiline(ExecState*, EncodedJSValue slotBase, EncodedJSValue, PropertyName)
+{            
+    return JSValue::encode(jsBoolean(asRegExpObject(slotBase)->regExp()->multiline()));
+}
+
+template <typename CharacterType>
+static inline void appendLineTerminatorEscape(StringBuilder&, CharacterType);
+
+template <>
+inline void appendLineTerminatorEscape<LChar>(StringBuilder& builder, LChar lineTerminator)
+{
+    if (lineTerminator == '\n')
+        builder.append('n');
+    else
+        builder.append('r');
+}
+
+template <>
+inline void appendLineTerminatorEscape<UChar>(StringBuilder& builder, UChar lineTerminator)
 {
-    asRegExpObject(JSValue::decode(thisValue))->setLastIndex(exec, JSValue::decode(value), true);
+    if (lineTerminator == '\n')
+        builder.append('n');
+    else if (lineTerminator == '\r')
+        builder.append('r');
+    else if (lineTerminator == 0x2028)
+        builder.appendLiteral("u2028");
+    else
+        builder.appendLiteral("u2029");
+}
+
+template <typename CharacterType>
+static inline JSValue regExpObjectSourceInternal(ExecState* exec, String pattern, const CharacterType* characters, unsigned length)
+{
+    bool previousCharacterWasBackslash = false;
+    bool inBrackets = false;
+    bool shouldEscape = false;
+
+    // 15.10.6.4 specifies that RegExp.prototype.toString must return '/' + source + '/',
+    // and also states that the result must be a valid RegularExpressionLiteral. '//' is
+    // not a valid RegularExpressionLiteral (since it is a single line comment), and hence
+    // source cannot ever validly be "". If the source is empty, return a different Pattern
+    // that would match the same thing.
+    if (!length)
+        return jsNontrivialString(exec, ASCIILiteral("(?:)"));
+
+    // early return for strings that don't contain a forwards slash and LineTerminator
+    for (unsigned i = 0; i < length; ++i) {
+        CharacterType ch = characters[i];
+        if (!previousCharacterWasBackslash) {
+            if (inBrackets) {
+                if (ch == ']')
+                    inBrackets = false;
+            } else {
+                if (ch == '/') {
+                    shouldEscape = true;
+                    break;
+                }
+                if (ch == '[')
+                    inBrackets = true;
+            }
+        }
+
+        if (Lexer<CharacterType>::isLineTerminator(ch)) {
+            shouldEscape = true;
+            break;
+        }
+
+        if (previousCharacterWasBackslash)
+            previousCharacterWasBackslash = false;
+        else
+            previousCharacterWasBackslash = ch == '\\';
+    }
+
+    if (!shouldEscape)
+        return jsString(exec, pattern);
+
+    previousCharacterWasBackslash = false;
+    inBrackets = false;
+    StringBuilder result;
+    for (unsigned i = 0; i < length; ++i) {
+        CharacterType ch = characters[i];
+        if (!previousCharacterWasBackslash) {
+            if (inBrackets) {
+                if (ch == ']')
+                    inBrackets = false;
+            } else {
+                if (ch == '/')
+                    result.append('\\');
+                else if (ch == '[')
+                    inBrackets = true;
+            }
+        }
+
+        // escape LineTerminator
+        if (Lexer<CharacterType>::isLineTerminator(ch)) {
+            if (!previousCharacterWasBackslash)
+                result.append('\\');
+
+            appendLineTerminatorEscape<CharacterType>(result, ch);
+        } else
+            result.append(ch);
+
+        if (previousCharacterWasBackslash)
+            previousCharacterWasBackslash = false;
+        else
+            previousCharacterWasBackslash = ch == '\\';
+    }
+
+    return jsString(exec, result.toString());
 }
 
-static void regExpObjectSetLastIndexNonStrict(ExecState* exec, EncodedJSValue thisValue, EncodedJSValue value)
+    
+    
+EncodedJSValue regExpObjectSource(ExecState* exec, EncodedJSValue slotBase, EncodedJSValue, PropertyName)
 {
-    asRegExpObject(JSValue::decode(thisValue))->setLastIndex(exec, JSValue::decode(value), false);
+    String pattern = asRegExpObject(slotBase)->regExp()->pattern();
+    if (pattern.is8Bit())
+        return JSValue::encode(regExpObjectSourceInternal(exec, pattern, pattern.characters8(), pattern.length()));
+    return JSValue::encode(regExpObjectSourceInternal(exec, pattern, pattern.characters16(), pattern.length()));
 }
 
 void RegExpObject::put(JSCell* cell, ExecState* exec, PropertyName propertyName, JSValue value, PutPropertySlot& slot)
 {
     if (propertyName == exec->propertyNames().lastIndex) {
         asRegExpObject(cell)->setLastIndex(exec, value, slot.isStrictMode());
-        slot.setCustomValue(asRegExpObject(cell), slot.isStrictMode()
-            ? regExpObjectSetLastIndexStrict
-            : regExpObjectSetLastIndexNonStrict);
         return;
     }
     Base::put(cell, exec, propertyName, value, slot);
@@ -162,7 +303,7 @@ void RegExpObject::put(JSCell* cell, ExecState* exec, PropertyName propertyName,
 JSValue RegExpObject::exec(ExecState* exec, JSString* string)
 {
     if (MatchResult result = match(exec, string))
-        return createRegExpMatchesArray(exec, string, regExp(), result);
+        return RegExpMatchesArray::create(exec, string, regExp(), result);
     return jsNull();
 }