1/*
2 * Copyright (C) 2008 Apple Inc. All Rights Reserved.
3 * Copyright (C) 2009 Torch Mobile, Inc. http://www.torchmobile.com/
4 * Copyright (C) 2010 Google, Inc. All Rights Reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#ifndef MarkupTokenizerInlines_h
29#define MarkupTokenizerInlines_h
30
31#include "platform/text/SegmentedString.h"
32
33namespace blink {
34
35inline bool isTokenizerWhitespace(UChar cc)
36{
37    return cc == ' ' || cc == '\x0A' || cc == '\x09' || cc == '\x0C';
38}
39
40inline void advanceStringAndASSERTIgnoringCase(SegmentedString& source, const char* expectedCharacters)
41{
42    while (*expectedCharacters)
43        source.advanceAndASSERTIgnoringCase(*expectedCharacters++);
44}
45
46inline void advanceStringAndASSERT(SegmentedString& source, const char* expectedCharacters)
47{
48    while (*expectedCharacters)
49        source.advanceAndASSERT(*expectedCharacters++);
50}
51
52#if COMPILER(MSVC)
53// We need to disable the "unreachable code" warning because we want to assert
54// that some code points aren't reached in the state machine.
55#pragma warning(disable: 4702)
56#endif
57
58#define BEGIN_STATE(prefix, stateName) case prefix::stateName: stateName:
59#define END_STATE() ASSERT_NOT_REACHED(); break;
60
61// We use this macro when the HTML5 spec says "reconsume the current input
62// character in the <mumble> state."
63#define RECONSUME_IN(prefix, stateName)                                    \
64    do {                                                                   \
65        m_state = prefix::stateName;                                       \
66        goto stateName;                                                    \
67    } while (false)
68
69// We use this macro when the HTML5 spec says "consume the next input
70// character ... and switch to the <mumble> state."
71#define ADVANCE_TO(prefix, stateName)                                      \
72    do {                                                                   \
73        m_state = prefix::stateName;                                       \
74        if (!m_inputStreamPreprocessor.advance(source))                    \
75            return haveBufferedCharacterToken();                           \
76        cc = m_inputStreamPreprocessor.nextInputCharacter();               \
77        goto stateName;                                                    \
78    } while (false)
79
80// Sometimes there's more complicated logic in the spec that separates when
81// we consume the next input character and when we switch to a particular
82// state. We handle those cases by advancing the source directly and using
83// this macro to switch to the indicated state.
84#define SWITCH_TO(prefix, stateName)                                       \
85    do {                                                                   \
86        m_state = prefix::stateName;                                       \
87        if (source.isEmpty() || !m_inputStreamPreprocessor.peek(source))   \
88            return haveBufferedCharacterToken();                           \
89        cc = m_inputStreamPreprocessor.nextInputCharacter();               \
90        goto stateName;                                                    \
91    } while (false)
92
93}
94
95#endif // MarkupTokenizerInlines_h
96