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
|
/*
* Copyright (C) 2009-2014 Max Kellermann <max.kellermann@gmail.com>
*
* 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.
*
* 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
* FOUNDATION 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.
*/
#ifndef TOKENIZER_HXX
#define TOKENIZER_HXX
class Tokenizer {
char *input;
public:
/**
* @param _input the input string; the contents will be
* modified by this class
*/
constexpr Tokenizer(char *_input):input(_input) {}
Tokenizer(const Tokenizer &) = delete;
Tokenizer &operator=(const Tokenizer &) = delete;
char *Rest() {
return input;
}
char CurrentChar() const {
return *input;
}
bool IsEnd() const {
return CurrentChar() == 0;
}
/**
* Reads the next word. Throws std::runtime_error on error.
*
* @return a pointer to the null-terminated word, or nullptr
* on end of line
*/
char *NextWord();
/**
* Reads the next unquoted word from the input string. Throws
* std::runtime_error on error.
*
* @return a pointer to the null-terminated word, or nullptr
* on end of line
*/
char *NextUnquoted();
/**
* Reads the next quoted string from the input string. A
* backslash escapes the following character. This function
* modifies the input string. Throws std::runtime_error on
* error.
*
* @return a pointer to the null-terminated string, or nullptr
* end of line
*/
char *NextString();
/**
* Reads the next unquoted word or quoted string from the
* input. This is a wrapper for NextUnquoted() and
* NextString(). Throws std::runtime_error on error.
*
* @return a pointer to the null-terminated string, or nullptr
* on end of line
*/
char *NextParam();
};
#endif
|
