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Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-src/src/VectorIterator.h')
-rw-r--r-- | Build/source/texk/dvisvgm/dvisvgm-src/src/VectorIterator.h | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-src/src/VectorIterator.h b/Build/source/texk/dvisvgm/dvisvgm-src/src/VectorIterator.h new file mode 100644 index 00000000000..dc27327a60c --- /dev/null +++ b/Build/source/texk/dvisvgm/dvisvgm-src/src/VectorIterator.h @@ -0,0 +1,109 @@ +/************************************************************************* +** VectorIterator.h ** +** ** +** This file is part of dvisvgm -- the DVI to SVG converter ** +** Copyright (C) 2005-2015 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 VECTORITERATOR_H +#define VECTORITERATOR_H + +#include <vector> +#include "MessageException.h" + + +struct IteratorException : public MessageException +{ + IteratorException (const std::string &msg) : MessageException(msg) {} +}; + + +template <typename T> +class VectorIterator +{ + public: + VectorIterator (std::vector<T> &vec) : _vector(vec), _pos(0) {} + + VectorIterator operator ++ () { + _pos++; + return *this; + } + + VectorIterator operator ++ (int) { + VectorIterator it = *this; + _pos++; + return it; + } + + VectorIterator operator -- () { + _pos--; + return *this; + } + + VectorIterator operator -- (int) { + VectorIterator it = *this; + _pos--; + return it; + } + + VectorIterator operator += (int n) { + _pos += n; + return *this; + } + + VectorIterator operator -= (int n) { + _pos -= n; + return *this; + } + + VectorIterator operator + (int n) { + return VectorIterator(_vector, _pos+n); + } + + VectorIterator operator - (int n) { + return VectorIterator(_vector, _pos-n); + } + + T& operator * () { + if (valid()) + return _vector[_pos]; + throw IteratorException("invalid access"); + } + + T* operator -> () { + if (valid()) + return &_vector[_pos]; + throw IteratorException("invalid access"); + } + + bool operator == (const VectorIterator &it) const {return _pos == it._pos;} + bool operator != (const VectorIterator &it) const {return _pos != it._pos;} + bool operator <= (const VectorIterator &it) const {return _pos <= it._pos;} + bool operator >= (const VectorIterator &it) const {return _pos >= it._pos;} + bool operator < (const VectorIterator &it) const {return _pos < it._pos;} + bool operator > (const VectorIterator &it) const {return _pos > it._pos;} + bool valid () const {return _pos >= 0 && _pos < _vector.size();} + void invalidate () {_pos = _vector.size();} + + protected: + VectorIterator (std::vector<T> &vec, size_t pos) : _vector(vec), _pos(pos) {} + + private: + std::vector<T> &_vector; + size_t _pos; +}; + +#endif |