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formater.hh
1 // -*- coding: utf-8 -*-
2 // Copyright (C) 2012, 2013, 2016 Laboratoire de Recherche et
3 // Développement de l'Epita (LRDE).
4 //
5 // This file is part of Spot, a model checking library.
6 //
7 // Spot is free software; you can redistribute it and/or modify it
8 // under the terms of the GNU General Public License as published by
9 // the Free Software Foundation; either version 3 of the License, or
10 // (at your option) any later version.
11 //
12 // Spot is distributed in the hope that it will be useful, but WITHOUT
13 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 // or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15 // License for more details.
16 //
17 // You should have received a copy of the GNU General Public License
18 // along with this program. If not, see <http://www.gnu.org/licenses/>.
19
20 #pragma once
21
22 #include <spot/misc/common.hh>
23 #include <spot/misc/timer.hh>
24 #include <iostream>
25 #include <string>
26 #include <vector>
27
28 #define UNUSED(expr) do { (void)(expr); } while (0)
29
30 namespace spot
31 {
32 class printable
33 {
34 public:
35 virtual ~printable()
36 {
37 }
38
39 virtual void
40 print(std::ostream&, const char*) const = 0;
41 };
42
43
44 template <class T>
45 class printable_value: public printable
46 {
47 protected:
48 T val_;
49 public:
50 const T& val() const
51 {
52 return val_;
53 }
54
55 T& val()
56 {
57 return val_;
58 }
59
60 operator const T&() const
61 {
62 return val();
63 }
64
65 operator T&()
66 {
67 return val();
68 }
69
70 printable_value&
71 operator=(const T& new_val)
72 {
73 val_ = new_val;
74 return *this;
75 }
76
77 printable_value&
78 operator=(T&& new_val)
79 {
80 val_ = std::move(new_val);
81 return *this;
82 }
83
84 virtual void
85 print(std::ostream& os, const char*) const override
86 {
87 os << val_;
88 }
89 };
90
91 // This function was defined to avoid compilation error when
92 // instantiating function spot::printable_value<spot::timer>::print
93 // because of: os << val_;
94 std::ostream& operator<<(std::ostream& os, const timer& dt)
95 {
96 UNUSED(dt);
97 return os;
98 }
99
101 class printable_id: public printable
102 {
103 public:
104 virtual void
105 print(std::ostream& os, const char* x) const override
106 {
107 os << '%' << *x;
108 }
109 };
110
112 class printable_percent: public printable
113 {
114 public:
115 virtual void
116 print(std::ostream& os, const char*) const override
117 {
118 os << '%';
119 }
120 };
121
122
123 class SPOT_API formater
124 {
125 printable_id id;
126 printable_percent percent;
127 public:
128
129 formater()
130 : has_(256), call_(256, &id)
131 {
132 call_['%'] = call_[0] = &percent;
133 }
134
135 virtual ~formater()
136 {
137 }
138
144 void
145 scan(const char* fmt, std::vector<bool>& has) const;
146
147 void
148 scan(const std::string& fmt, std::vector<bool>& has) const
149 {
150 scan(fmt.c_str(), has);
151 }
153
156 void
157 prime(const char* fmt);
158
159 void
160 prime(const std::string& fmt)
161 {
162 prime(fmt.c_str());
163 }
165
167 bool
168 has(char c) const
169 {
170 return has_[c];
171 }
172
174 void
175 declare(char c, const printable* f)
176 {
177 call_[c] = f;
178 }
179
181 void
182 set_output(std::ostream& output)
183 {
184 output_ = &output;
185 }
186
188 std::ostream&
189 format(const char* fmt);
190
192 std::ostream&
193 format(std::ostream& output, const char* fmt)
194 {
195 std::ostream* tmp = output_;
196 set_output(output);
197 format(fmt);
198 set_output(*tmp);
199 return output;
200 }
201
203 std::ostream&
204 format(const std::string& fmt)
205 {
206 return format(fmt.c_str());
207 }
208
210 std::ostream&
211 format(std::ostream& output, const std::string& fmt)
212 {
213 return format(output, fmt.c_str());
214 }
215
216 private:
217 std::vector<bool> has_;
218 std::vector<const printable*> call_;
219 protected:
220 std::ostream* output_;
221 };
222 }
spot
Definition: graph.hh:33
spot::printable_id
The default callback simply writes "%c".
Definition: formater.hh:101
spot::formater::set_output
void set_output(std::ostream &output)
Remember where to output any string.
Definition: formater.hh:182
spot::printable_value
Definition: formater.hh:45
spot::formater::format
std::ostream & format(std::ostream &output, const std::string &fmt)
Expand the %-sequences in fmt, write the result on output.
Definition: formater.hh:211
spot::formater::scan
void scan(const std::string &fmt, std::vector< bool > &has) const
Scan the %-sequences occuring in fmt.
Definition: formater.hh:148
spot::formater::prime
void prime(const std::string &fmt)
Definition: formater.hh:160
spot::formater::format
std::ostream & format(const std::string &fmt)
Expand the %-sequences in fmt, write the result on output_.
Definition: formater.hh:204
spot::formater::declare
void declare(char c, const printable *f)
Declare a callback function for c.
Definition: formater.hh:175
spot::printable
Definition: formater.hh:32
spot::printable_percent
Called by default for "%%" and "%\0".
Definition: formater.hh:112
spot::formater::has
bool has(char c) const
Whether c occurred in the primed formats.
Definition: formater.hh:168
spot::formater::format
std::ostream & format(std::ostream &output, const char *fmt)
Expand the %-sequences in fmt, write the result on output.
Definition: formater.hh:193
spot::formater
Definition: formater.hh:123
spot::timer
Definition: timer.hh:85

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