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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "core/css/parser/CSSTokenizerInputStream.h"
#include "core/html/parser/HTMLParserIdioms.h"
#include "wtf/text/StringToNumber.h"
namespace blink {
CSSTokenizerInputStream::CSSTokenizerInputStream(const String& input)
: m_offset(0), m_stringLength(input.length()), m_string(input.impl()) {}
void CSSTokenizerInputStream::advanceUntilNonWhitespace() {
// Using HTML space here rather than CSS space since we don't do preprocessing
if (m_string->is8Bit()) {
const LChar* characters = m_string->characters8();
while (m_offset < m_stringLength && isHTMLSpace(characters[m_offset]))
++m_offset;
} else {
const UChar* characters = m_string->characters16();
while (m_offset < m_stringLength && isHTMLSpace(characters[m_offset]))
++m_offset;
}
}
double CSSTokenizerInputStream::getDouble(unsigned start, unsigned end) const {
DCHECK(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->characters8() + m_offset + start,
end - start, &isResultOK);
else
result = charactersToDouble(m_string->characters16() + m_offset + start,
end - start, &isResultOK);
}
// FIXME: It looks like callers ensure we have a valid number
return isResultOK ? result : 0.0;
}
} // namespace blink
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