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/*
* Copyright (C) 2004-2017 Apple Inc. All rights reserved.
* Copyright (C) 2006 Alexey Proskuryakov <ap@nypop.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "TextCodec.h"
#include <unicode/uchar.h>
#include <wtf/TZoneMallocInlines.h>
#include <wtf/text/WTFString.h>
#include <wtf/unicode/CharacterNames.h>
#include <array>
#include <cstdio>
namespace PAL {
WTF_MAKE_TZONE_ALLOCATED_IMPL(TextCodec);
std::span<char> TextCodec::getUnencodableReplacement(char32_t codePoint, UnencodableHandling handling, UnencodableReplacementArray& replacement)
{
ASSERT(!(codePoint > UCHAR_MAX_VALUE));
// The Encoding Standard doesn't have surrogate code points in the input, but that would require
// scanning and potentially manipulating inputs ahead of time. Instead handle them at the last
// possible point.
if (U_IS_SURROGATE(codePoint))
codePoint = replacementCharacter;
switch (handling) {
case UnencodableHandling::Entities: {
int count = SAFE_SPRINTF(std::span { replacement }, "&#%u;", static_cast<unsigned>(codePoint));
ASSERT(count >= 0);
return std::span { replacement }.first(std::max<int>(0, count));
}
case UnencodableHandling::URLEncodedEntities: {
int count = SAFE_SPRINTF(std::span { replacement }, "%%26%%23%u%%3B", static_cast<unsigned>(codePoint));
ASSERT(count >= 0);
return std::span { replacement }.first(std::max<int>(0, count));
} }
ASSERT_NOT_REACHED();
replacement[0] = '\0';
return std::span { replacement }.first(0);
}
} // namespace PAL
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