97 lines
4.8 KiB
C++
97 lines
4.8 KiB
C++
/*
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* Copyright (C) 2008-2016 Apple Inc. All Rights Reserved.
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* Copyright (C) 2009 Torch Mobile, Inc. http://www.torchmobile.com/
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* Copyright (C) 2010 Google, Inc. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if COMPILER(MSVC)
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// Disable the "unreachable code" warning so we can compile the ASSERT_NOT_REACHED in the END_STATE macro.
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#pragma warning(disable: 4702)
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#endif
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namespace WebCore {
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inline bool isTokenizerWhitespace(UChar character)
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{
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return character == ' ' || character == '\x0A' || character == '\x09' || character == '\x0C';
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}
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#define BEGIN_STATE(stateName) \
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case stateName: \
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stateName: { \
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constexpr auto currentState = stateName; \
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UNUSED_PARAM(currentState);
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#define END_STATE() \
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ASSERT_NOT_REACHED(); \
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break; \
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}
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#define RETURN_IN_CURRENT_STATE(expression) \
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do { \
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m_state = currentState; \
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return expression; \
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} while (false)
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// We use this macro when the HTML spec says "reconsume the current input character in the <mumble> state."
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#define RECONSUME_IN(newState) \
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do { \
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goto newState; \
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} while (false)
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// We use this macro when the HTML spec says "consume the next input character ... and switch to the <mumble> state."
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#define ADVANCE_TO(newState) \
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do { \
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if (!m_preprocessor.advance(source, isNullCharacterSkippingState(newState))) { \
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m_state = newState; \
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return haveBufferedCharacterToken(); \
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} \
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character = m_preprocessor.nextInputCharacter(); \
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goto newState; \
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} while (false)
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#define ADVANCE_PAST_NON_NEWLINE_TO(newState) \
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do { \
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if (!m_preprocessor.advancePastNonNewline(source, isNullCharacterSkippingState(newState))) { \
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m_state = newState; \
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return haveBufferedCharacterToken(); \
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} \
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character = m_preprocessor.nextInputCharacter(); \
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goto newState; \
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} while (false)
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// For more complex cases, caller consumes the characters first and then uses this macro.
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#define SWITCH_TO(newState) \
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do { \
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if (!m_preprocessor.peek(source, isNullCharacterSkippingState(newState))) { \
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m_state = newState; \
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return haveBufferedCharacterToken(); \
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} \
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character = m_preprocessor.nextInputCharacter(); \
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goto newState; \
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} while (false)
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} // namespace WebCore
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