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authorPeter Breitenlohner <peb@mppmu.mpg.de>2010-06-23 06:19:44 +0000
committerPeter Breitenlohner <peb@mppmu.mpg.de>2010-06-23 06:19:44 +0000
commitdf1028062de43c8c57a8def0c6e414947e3dc76c (patch)
treec8f7050832e1ef06556f70ca43877ace8da33582 /Build/source/texk/dvisvgm/dvisvgm-1.0.2/src/InputBuffer.h
parent7e89a9907f75d06d96ec374f0dfe20142d86ac81 (diff)
dvisvgm 1.0.2
git-svn-id: svn://tug.org/texlive/trunk@19118 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-1.0.2/src/InputBuffer.h')
-rw-r--r--Build/source/texk/dvisvgm/dvisvgm-1.0.2/src/InputBuffer.h145
1 files changed, 145 insertions, 0 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-1.0.2/src/InputBuffer.h b/Build/source/texk/dvisvgm/dvisvgm-1.0.2/src/InputBuffer.h
new file mode 100644
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--- /dev/null
+++ b/Build/source/texk/dvisvgm/dvisvgm-1.0.2/src/InputBuffer.h
@@ -0,0 +1,145 @@
+/*************************************************************************
+** InputBuffer.h **
+** **
+** This file is part of dvisvgm -- the DVI to SVG converter **
+** Copyright (C) 2005-2010 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 INPUTBUFFER_H
+#define INPUTBUFFER_H
+
+#include <algorithm>
+#include <cstring>
+#include <istream>
+#include <string>
+#include <ostream>
+#include "types.h"
+
+struct InputBuffer
+{
+ virtual ~InputBuffer () {}
+ virtual int get () =0;
+ virtual int peek () const =0;
+ virtual int peek (unsigned n) const =0;
+ virtual bool eof () const =0;
+ virtual void invalidate () =0;
+};
+
+
+class StreamInputBuffer : public InputBuffer
+{
+ public:
+ StreamInputBuffer (std::istream &is, unsigned bufsize=1024);
+ ~StreamInputBuffer ();
+ int get ();
+ int peek () const;
+ int peek (unsigned n) const;
+ bool eof () const {return pos() == _size1 && _size2 == 0;}
+ void invalidate () {_bufptr = _buf1+_size1; _size2 = 0;}
+
+ protected:
+ int fillBuffer (UInt8 *buf);
+ unsigned pos () const {return _bufptr-_buf1;}
+
+ private:
+ std::istream &_is;
+ const unsigned _bufsize; ///< maximal number of bytes each buffer can hold
+ UInt8 *_buf1; ///< pointer to first buffer
+ UInt8 *_buf2; ///< pointer to second buffer
+ unsigned _size1; ///< number of bytes in buffer 1
+ unsigned _size2; ///< number of bytes in buffer 2
+ UInt8 *_bufptr; ///< pointer to next byte to read
+};
+
+
+class StringInputBuffer : public InputBuffer
+{
+ public:
+ StringInputBuffer (std::string &str) : _str(str), _pos(0) {}
+ int get () {return _pos < _str.length() ? _str[_pos++] : -1;}
+ int peek () const {return _pos < _str.length() ? _str[_pos] : -1;}
+ int peek (unsigned n) const {return _pos+n < _str.length() ? _str[_pos+n] : -1;}
+ bool eof () const {return _pos >= _str.length();}
+ void invalidate () {_pos = _str.length();}
+
+ private:
+ std::string &_str;
+ unsigned _pos;
+};
+
+
+class CharInputBuffer : public InputBuffer
+{
+ public:
+ CharInputBuffer (const char *buf, unsigned size) : _pos(buf), _size(buf ? size : 0) {}
+
+ int get () {
+ if (_size <= 0)
+ return -1;
+ else {
+ _size--;
+ return *_pos++;
+ }
+ }
+
+
+ void assign (const char *buf, unsigned size) {
+ _pos = buf;
+ _size = size;
+ }
+
+ void assign (const char *buf) {assign(buf, strlen(buf));}
+ int peek () const {return _size > 0 ? *_pos : -1;}
+ int peek (unsigned n) const {return _size >= n ? _pos[n] : -1;}
+ bool eof () const {return _size <= 0;}
+ void invalidate () {_size = 0;}
+
+ private:
+ const char *_pos;
+ unsigned _size;
+};
+
+
+class SplittedCharInputBuffer : public InputBuffer
+{
+ public:
+ SplittedCharInputBuffer (const char *buf1, unsigned s1, const char *buf2, unsigned s2);
+ int get ();
+ int peek () const;
+ int peek (unsigned n) const;
+ bool eof () const {return _size[_index] == 0;}
+ void invalidate () {_size[_index] = 0;}
+
+ private:
+ const char *_buf[2];
+ unsigned _size[2];
+ int _index;
+};
+
+
+class TextStreamInputBuffer : public StreamInputBuffer
+{
+ public:
+ TextStreamInputBuffer (std::istream &is) : StreamInputBuffer(is), _line(1), _col(1) {}
+ int get ();
+ int line () const {return _line;}
+ int col () const {return _col;}
+
+ private:
+ int _line, _col;
+};
+
+#endif