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// Copyright 2014 The Chromium Authors. All rights reserved.
// Copyright (C) 2016-2024 Apple Inc. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * 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.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "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 THE COPYRIGHT
// OWNER 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 "CSSTokenizerInputStream.h"
#include "CSSTokenizer.h"
namespace WebCore {
DEFINE_ALLOCATOR_WITH_HEAP_IDENTIFIER(CSSTokenizerInputStream);
CSSTokenizerInputStream::CSSTokenizerInputStream(const String& input)
: m_offset(0)
, m_stringLength(input.length())
, m_string(input.impl())
{
}
void CSSTokenizerInputStream::advanceUntilNonWhitespace()
{
// Using ASCII whitespace here rather than CSS space since we don't do preprocessing
auto advance = [this](auto characters) {
while (m_offset < m_stringLength && isASCIIWhitespace(characters[m_offset]))
++m_offset;
};
if (m_string->is8Bit())
advance(m_string->span8());
else
advance(m_string->span16());
}
void CSSTokenizerInputStream::advanceUntilNewlineOrNonWhitespace()
{
auto advance = [this](auto characters) {
while (m_offset < m_stringLength && isASCIIWhitespace(characters[m_offset])) {
if (CSSTokenizer::isNewline(characters[m_offset]))
return;
++m_offset;
}
};
if (m_string->is8Bit())
advance(m_string->span8());
else
advance(m_string->span16());
}
double CSSTokenizerInputStream::getDouble(unsigned start, unsigned end) const
{
ASSERT(start <= end && ((m_offset + end) <= m_stringLength));
bool isResultOK = false;
double result = 0.0;
if (start < end) {
if (m_string->is8Bit())
result = charactersToDouble(m_string->span8().subspan(m_offset + start, end - start), &isResultOK);
else
result = charactersToDouble(m_string->span16().subspan(m_offset + start, end - start), &isResultOK);
}
// FIXME: It looks like callers ensure we have a valid number
return isResultOK ? result : 0.0;
}
} // namespace WebCore
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