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/*
* Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
* Copyright (C) 2004-2011, 2013, 2016 Apple Inc. All rights reserved.
* Copyright (C) 2007 Samuel Weinig <sam@webkit.org>
* Copyright (C) 2013 Michael Pruett <michael@68k.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "JSDOMConvertStrings.h"
#include "JSDOMExceptionHandling.h"
#include <heap/HeapInlines.h>
#include <runtime/JSCJSValueInlines.h>
#include <wtf/text/StringBuilder.h>
#include <wtf/unicode/CharacterNames.h>
using namespace JSC;
namespace WebCore {
static inline String stringToByteString(ExecState& state, JSC::ThrowScope& scope, String&& string)
{
if (!string.containsOnlyLatin1()) {
throwTypeError(&state, scope);
return { };
}
return string;
}
String identifierToByteString(ExecState& state, const Identifier& identifier)
{
VM& vm = state.vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto string = identifier.string();
return stringToByteString(state, scope, WTFMove(string));
}
String valueToByteString(ExecState& state, JSValue value)
{
VM& vm = state.vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto string = value.toWTFString(&state);
RETURN_IF_EXCEPTION(scope, { });
return stringToByteString(state, scope, WTFMove(string));
}
static inline bool hasUnpairedSurrogate(StringView string)
{
// Fast path for 8-bit strings; they can't have any surrogates.
if (string.is8Bit())
return false;
for (auto codePoint : string.codePoints()) {
if (U_IS_SURROGATE(codePoint))
return true;
}
return false;
}
static inline String stringToUSVString(String&& string)
{
// Fast path for the case where there are no unpaired surrogates.
if (!hasUnpairedSurrogate(string))
return string;
// Slow path: http://heycam.github.io/webidl/#dfn-obtain-unicode
// Replaces unpaired surrogates with the replacement character.
StringBuilder result;
result.reserveCapacity(string.length());
StringView view { string };
for (auto codePoint : view.codePoints()) {
if (U_IS_SURROGATE(codePoint))
result.append(replacementCharacter);
else
result.append(codePoint);
}
return result.toString();
}
String identifierToUSVString(ExecState&, const Identifier& identifier)
{
auto string = identifier.string();
return stringToUSVString(WTFMove(string));
}
String valueToUSVString(ExecState& state, JSValue value)
{
VM& vm = state.vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto string = value.toWTFString(&state);
RETURN_IF_EXCEPTION(scope, { });
return stringToUSVString(WTFMove(string));
}
} // namespace WebCore
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