JSAtom *
js::AtomizeString(JSContext *cx, JSString *str, js::InternBehavior ib /* = js::DoNotInternAtom */)
{
if (str->isAtom()) {
JSAtom &atom = str->asAtom();
/* N.B. static atoms are effectively always interned. */
if (ib != InternAtom || js::StaticStrings::isStatic(&atom))
return &atom;
AtomSet::Ptr p = cx->runtime->atoms.lookup(AtomHasher::Lookup(&atom));
JS_ASSERT(p); /* Non-static atom must exist in atom state set. */
JS_ASSERT(p->asPtr() == &atom);
JS_ASSERT(ib == InternAtom);
p->setTagged(bool(ib));
return &atom;
}
const jschar *chars = str->getChars(cx);
if (!chars)
return NULL;
if (JSAtom *atom = AtomizeAndCopyChars<NoGC>(cx, chars, str->length(), ib))
return atom;
if (!allowGC)
return NULL;
JSLinearString *linear = str->ensureLinear(cx);
if (!linear)
return NULL;
JS_ASSERT(linear->length() <= JSString::MAX_LENGTH);
return AtomizeAndCopyChars<CanGC>(cx, linear->chars(), linear->length(), ib);
}
JSAtom *
js_AtomizeString(JSContext *cx, JSString *str, InternBehavior ib)
{
if (str->isAtom()) {
JSAtom &atom = str->asAtom();
/* N.B. static atoms are effectively always interned. */
if (ib != InternAtom || atom.isStaticAtom())
return &atom;
/* Here we have to check whether the atom is already interned. */
AutoLockAtomsCompartment lock(cx);
AtomSet &atoms = cx->runtime->atomState.atoms;
AtomSet::Ptr p = atoms.lookup(AtomHasher::Lookup(&atom));
JS_ASSERT(p); /* Non-static atom must exist in atom state set. */
JS_ASSERT(p->asPtr() == &atom);
JS_ASSERT(ib == InternAtom);
p->setTagged(bool(ib));
return &atom;
}
if (str->isAtom())
return &str->asAtom();
size_t length = str->length();
const jschar *chars = str->getChars(cx);
if (!chars)
return NULL;
JS_ASSERT(length <= JSString::MAX_LENGTH);
return Atomize(cx, &chars, length, ib);
}
JSAtom *
js::AtomizeString(ExclusiveContext *cx, JSString *str,
js::InternBehavior ib /* = js::DoNotInternAtom */)
{
if (str->isAtom()) {
JSAtom &atom = str->asAtom();
/* N.B. static atoms are effectively always interned. */
if (ib != InternAtom || js::StaticStrings::isStatic(&atom))
return &atom;
AtomHasher::Lookup lookup(&atom);
/* Likewise, permanent atoms are always interned. */
AtomSet::Ptr p = cx->permanentAtoms().readonlyThreadsafeLookup(lookup);
if (p)
return &atom;
AutoLockForExclusiveAccess lock(cx);
p = cx->atoms().lookup(lookup);
JS_ASSERT(p); /* Non-static atom must exist in atom state set. */
JS_ASSERT(p->asPtr() == &atom);
JS_ASSERT(ib == InternAtom);
p->setTagged(bool(ib));
return &atom;
}
const jschar *chars = str->getChars(cx);
if (!chars)
return nullptr;
return AtomizeAndCopyChars(cx, chars, str->length(), ib);
}
JSAtom *
js::AtomizeString(ExclusiveContext *cx, JSString *str,
js::InternBehavior ib /* = js::DoNotInternAtom */)
{
if (str->isAtom()) {
JSAtom &atom = str->asAtom();
/* N.B. static atoms are effectively always interned. */
if (ib != InternAtom || js::StaticStrings::isStatic(&atom))
return &atom;
AtomHasher::Lookup lookup(&atom);
/* Likewise, permanent atoms are always interned. */
MOZ_ASSERT(cx->isPermanentAtomsInitialized());
AtomSet::Ptr p = cx->permanentAtoms().readonlyThreadsafeLookup(lookup);
if (p)
return &atom;
AutoLockForExclusiveAccess lock(cx);
p = cx->atoms().lookup(lookup);
MOZ_ASSERT(p); /* Non-static atom must exist in atom state set. */
MOZ_ASSERT(p->asPtr() == &atom);
MOZ_ASSERT(ib == InternAtom);
p->setTagged(bool(ib));
return &atom;
}
JSLinearString *linear = str->ensureLinear(cx);
if (!linear)
return nullptr;
JS::AutoCheckCannotGC nogc;
return linear->hasLatin1Chars()
? AtomizeAndCopyChars(cx, linear->latin1Chars(nogc), linear->length(), ib)
: AtomizeAndCopyChars(cx, linear->twoByteChars(nogc), linear->length(), ib);
}