blob: 90f165873218db6c5ea9a3eefe1737f48b7e9a7b (
plain)
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
|
/*************************************************************************
** InputReader.hpp **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2024 Martin Gieseking <martin.gieseking@uos.de> **
** **
** This program is free software; you can redistribute it and/or **
** modify it under the terms of the GNU General Public License as **
** published by the Free Software Foundation; either version 3 of **
** the License, or (at your option) any later version. **
** **
** This program is distributed in the hope that it will be useful, but **
** WITHOUT ANY WARRANTY; without even the implied warranty of **
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the **
** GNU General Public License for more details. **
** **
** You should have received a copy of the GNU General Public License **
** along with this program; if not, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#ifndef INPUTREADER_HPP
#define INPUTREADER_HPP
#include <istream>
#include <map>
#include <string>
#include <vector>
#include "InputBuffer.hpp"
class InputReader {
public:
virtual ~InputReader() =default;
virtual int get () =0;
virtual int peek () const =0;
virtual int peek (size_t n) const =0;
virtual bool eof () const =0;
virtual bool check (char c) const {return peek() == c;}
virtual bool check (const char *s, bool consume=true);
virtual void skip (size_t n);
virtual bool skipUntil (const char *str);
virtual std::string readUntil (const char *str);
virtual int find (char c) const;
virtual void skipSpace ();
virtual int getInt ();
virtual bool parseInt (int &val, bool accept_sign=true);
virtual bool parseUInt (int base, unsigned &val);
virtual bool parseUInt (unsigned &val);
virtual char parseDouble (double &val);
virtual double getDouble ();
virtual std::string getWord ();
virtual char getPunct ();
virtual std::string getQuotedString (const char *quotechars);
virtual std::string getString ();
virtual std::string getString (size_t n);
virtual std::string getString (const char *delim);
virtual std::string getLine ();
virtual int parseAttributes (std::map<std::string,std::string> &attr, bool requireValues, const char *quotechars=nullptr);
virtual operator bool () const {return !eof();}
};
class StreamInputReader : public InputReader {
public:
explicit StreamInputReader (std::istream &is) : _is(is) {}
int get () override {return _is.get();}
int peek () const override {return _is.peek();}
int peek (size_t n) const override;
bool eof () const override {return !_is || _is.eof();}
std::istream& getStream () {return _is;}
private:
std::istream &_is;
};
class BufferInputReader : public InputReader {
public:
explicit BufferInputReader (InputBuffer &ib) : _ib(&ib) {}
void assign (InputBuffer &ib) {_ib = &ib;}
int get () override {return _ib->get();}
int peek () const override {return _ib->peek();}
int peek (size_t n) const override {return _ib->peek(n);}
bool eof () const override {return _ib->eof();}
private:
InputBuffer *_ib;
};
/** Implementation of the Knuth-Morris-Pratt search algorithm.
* http://www.inf.fh-flensburg.de/lang/algorithmen/pattern/kmpen.htm */
class StringMatcher {
public:
StringMatcher () : _charsRead(0) {}
explicit StringMatcher (const std::string &pattern) : _charsRead(0) {setPattern(pattern);}
void setPattern (const std::string &pattern);
bool match (InputReader &ir);
std::string read (InputReader &ir);
size_t charsRead () const {return _charsRead;}
private:
std::string _pattern;
std::vector<int> _borders;
size_t _charsRead;
};
#endif
|
