diff options
author | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
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committer | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
commit | e0c6872cf40896c7be36b11dcc744620f10adf1d (patch) | |
tree | 60335e10d2f4354b0674ec22d7b53f0f8abee672 /dviware/dvisvgm/src/InputReader.hpp |
Initial commit
Diffstat (limited to 'dviware/dvisvgm/src/InputReader.hpp')
-rw-r--r-- | dviware/dvisvgm/src/InputReader.hpp | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/dviware/dvisvgm/src/InputReader.hpp b/dviware/dvisvgm/src/InputReader.hpp new file mode 100644 index 0000000000..0ca4f10772 --- /dev/null +++ b/dviware/dvisvgm/src/InputReader.hpp @@ -0,0 +1,107 @@ +/************************************************************************* +** InputReader.hpp ** +** ** +** This file is part of dvisvgm -- a fast DVI to SVG converter ** +** Copyright (C) 2005-2019 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<size_t> _borders; + size_t _charsRead; +}; + +#endif |