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
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/*
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
//////////////////////////////////////////////////////////////////////////////////////////////
//
// Implement the classes for the various types of hash keys we support.
//
#pragma once
#include <string>
#include "ts/ts.h"
#include "resources.h"
#include "statement.h"
#include "matcher.h"
#include "parser.h"
// Condition modifiers
enum CondModifiers {
COND_NONE = 0,
COND_OR = 1,
COND_AND = 2,
COND_NOT = 4,
COND_NOCASE = 8, // Not implemented
COND_LAST = 16,
COND_CHAIN = 32 // Not implemented
};
///////////////////////////////////////////////////////////////////////////////
// Base class for all Conditions (this is also the interface)
//
class Condition : public Statement
{
public:
Condition() { TSDebug(PLUGIN_NAME_DBG, "Calling CTOR for Condition"); }
~Condition() override
{
TSDebug(PLUGIN_NAME_DBG, "Calling DTOR for Condition");
delete _matcher;
}
// noncopyable
Condition(const Condition &) = delete;
void operator=(const Condition &) = delete;
// Inline this, it's critical for speed (and only used twice)
bool
do_eval(const Resources &res)
{
bool rt = eval(res);
if (_mods & COND_NOT) {
rt = !rt;
}
if (_next) {
if (_mods & COND_OR) {
return rt || (static_cast<Condition *>(_next)->do_eval(res));
} else { // AND is the default
// Short circuit if we're an AND and the first condition is FALSE.
if (rt) {
return static_cast<Condition *>(_next)->do_eval(res);
} else {
return false;
}
}
} else {
return rt;
}
return false; // Shouldn't happen.
}
bool
last() const
{
return _mods & COND_LAST;
}
// Setters
virtual void
set_qualifier(const std::string &q)
{
_qualifier = q;
}
// Some getters
const Matcher *
get_matcher() const
{
return _matcher;
}
MatcherOps
get_cond_op() const
{
return _cond_op;
}
const std::string
get_qualifier() const
{
return _qualifier;
}
// Virtual methods, has to be implemented by each conditional;
void initialize(Parser &p) override;
virtual void append_value(std::string &s, const Resources &res) = 0;
protected:
// Evaluate the condition
virtual bool eval(const Resources &res) = 0;
std::string _qualifier;
MatcherOps _cond_op = MATCH_EQUAL;
Matcher *_matcher = nullptr;
private:
CondModifiers _mods = COND_NONE;
};
|
