#include "config.h"
#include "IdentifierRep.h"
#include "JSDOMBinding.h"
#include <wtf/HashMap.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/StdLibExtras.h>
#include <wtf/text/WTFString.h>
using namespace JSC;
namespace WebCore {
typedef HashSet<IdentifierRep*> IdentifierSet;
static IdentifierSet& identifierSet()
{
static NeverDestroyed<IdentifierSet> identifierSet;
return identifierSet;
}
typedef HashMap<int, IdentifierRep*> IntIdentifierMap;
static IntIdentifierMap& intIdentifierMap()
{
static NeverDestroyed<IntIdentifierMap> intIdentifierMap;
return intIdentifierMap;
}
IdentifierRep* IdentifierRep::get(int intID)
{
if (intID == 0 || intID == -1) {
static IdentifierRep* negativeOneAndZeroIdentifiers[2];
IdentifierRep* identifier = negativeOneAndZeroIdentifiers[intID + 1];
if (!identifier) {
identifier = new IdentifierRep(intID);
negativeOneAndZeroIdentifiers[intID + 1] = identifier;
}
return identifier;
}
IntIdentifierMap::AddResult result = intIdentifierMap().add(intID, nullptr);
if (result.isNewEntry) {
ASSERT(!result.iterator->value);
result.iterator->value = new IdentifierRep(intID);
identifierSet().add(result.iterator->value);
}
return result.iterator->value;
}
typedef HashMap<RefPtr<StringImpl>, IdentifierRep*> StringIdentifierMap;
static StringIdentifierMap& stringIdentifierMap()
{
static NeverDestroyed<StringIdentifierMap> stringIdentifierMap;
return stringIdentifierMap;
}
IdentifierRep* IdentifierRep::get(const char* name)
{
ASSERT(name);
if (!name)
return 0;
String string = String::fromUTF8WithLatin1Fallback(name, strlen(name));
StringIdentifierMap::AddResult result = stringIdentifierMap().add(string.impl(), nullptr);
if (result.isNewEntry) {
ASSERT(!result.iterator->value);
result.iterator->value = new IdentifierRep(name);
identifierSet().add(result.iterator->value);
}
return result.iterator->value;
}
bool IdentifierRep::isValid(IdentifierRep* identifier)
{
return identifierSet().contains(identifier);
}
}