1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef __nsWhitespaceTokenizer_h
#define __nsWhitespaceTokenizer_h
#include "mozilla/RangedPtr.h"
#include "nsDependentSubstring.h"
#include "nsCRT.h"
template<typename DependentSubstringType, bool IsWhitespace(char16_t)>
class nsTWhitespaceTokenizer
{
typedef typename DependentSubstringType::char_type CharType;
typedef typename DependentSubstringType::substring_type SubstringType;
public:
explicit nsTWhitespaceTokenizer(const SubstringType& aSource)
: mIter(aSource.Data(), aSource.Length())
, mEnd(aSource.Data() + aSource.Length(), aSource.Data(),
aSource.Length())
, mWhitespaceBeforeFirstToken(false)
, mWhitespaceAfterCurrentToken(false)
{
while (mIter < mEnd && IsWhitespace(*mIter)) {
mWhitespaceBeforeFirstToken = true;
++mIter;
}
}
/**
* Checks if any more tokens are available.
*/
bool hasMoreTokens() const
{
return mIter < mEnd;
}
/*
* Returns true if there is whitespace prior to the first token.
*/
bool whitespaceBeforeFirstToken() const
{
return mWhitespaceBeforeFirstToken;
}
/*
* Returns true if there is any whitespace after the current token.
* This is always true unless we're reading the last token.
*/
bool whitespaceAfterCurrentToken() const
{
return mWhitespaceAfterCurrentToken;
}
/**
* Returns the next token.
*/
const DependentSubstringType nextToken()
{
const mozilla::RangedPtr<const CharType> tokenStart = mIter;
while (mIter < mEnd && !IsWhitespace(*mIter)) {
++mIter;
}
const mozilla::RangedPtr<const CharType> tokenEnd = mIter;
mWhitespaceAfterCurrentToken = false;
while (mIter < mEnd && IsWhitespace(*mIter)) {
mWhitespaceAfterCurrentToken = true;
++mIter;
}
return Substring(tokenStart.get(), tokenEnd.get());
}
private:
mozilla::RangedPtr<const CharType> mIter;
const mozilla::RangedPtr<const CharType> mEnd;
bool mWhitespaceBeforeFirstToken;
bool mWhitespaceAfterCurrentToken;
};
template<bool IsWhitespace(char16_t) = NS_IsAsciiWhitespace>
class nsWhitespaceTokenizerTemplate
: public nsTWhitespaceTokenizer<nsDependentSubstring, IsWhitespace>
{
public:
explicit nsWhitespaceTokenizerTemplate(const nsSubstring& aSource)
: nsTWhitespaceTokenizer<nsDependentSubstring, IsWhitespace>(aSource)
{
}
};
typedef nsWhitespaceTokenizerTemplate<> nsWhitespaceTokenizer;
template<bool IsWhitespace(char16_t) = NS_IsAsciiWhitespace>
class nsCWhitespaceTokenizerTemplate
: public nsTWhitespaceTokenizer<nsDependentCSubstring, IsWhitespace>
{
public:
explicit nsCWhitespaceTokenizerTemplate(const nsCSubstring& aSource)
: nsTWhitespaceTokenizer<nsDependentCSubstring, IsWhitespace>(aSource)
{
}
};
typedef nsCWhitespaceTokenizerTemplate<> nsCWhitespaceTokenizer;
#endif /* __nsWhitespaceTokenizer_h */
|
