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Diffstat (limited to 'basebmp/inc/basebmp/stridedarrayiterator.hxx')
-rw-r--r-- | basebmp/inc/basebmp/stridedarrayiterator.hxx | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/basebmp/inc/basebmp/stridedarrayiterator.hxx b/basebmp/inc/basebmp/stridedarrayiterator.hxx new file mode 100644 index 000000000000..bcff5a21c518 --- /dev/null +++ b/basebmp/inc/basebmp/stridedarrayiterator.hxx @@ -0,0 +1,102 @@ +/************************************************************************* + * + * OpenOffice.org - a multi-platform office productivity suite + * + * $RCSfile: stridedarrayiterator.hxx,v $ + * + * $Revision: 1.1 $ + * + * last change: $Author: thb $ $Date: 2006-05-31 09:49:43 $ + * + * The Contents of this file are made available subject to + * the terms of GNU Lesser General Public License Version 2.1. + * + * + * GNU Lesser General Public License Version 2.1 + * ============================================= + * Copyright 2005 by Sun Microsystems, Inc. + * 901 San Antonio Road, Palo Alto, CA 94303, USA + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License version 2.1, as published by the Free Software Foundation. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + ************************************************************************/ + +#ifndef INCLUDED_BASEBMP_STRIDEDARRAYITERATOR_HXX +#define INCLUDED_BASEBMP_STRIDEDARRAYITERATOR_HXX + +namespace basebmp +{ + +// changed semantics re. DirectionSelector<StridedArrayTag>: stride +// now counts in <em>raw</em> bytes! +template< typename T > class StridedArrayIterator +{ +public: + typedef typename clone_const<T, unsigned char>::type internal_type; + + StridedArrayIterator(int stride, T* ptr = 0) : + stride_(stride), + current_(reinterpret_cast<internal_type*>(ptr)) + {} + + /// Copy from other StridedArrayIterator, plus given offset + StridedArrayIterator( StridedArrayIterator const& rSrc, + int offset ) : + stride_(rSrc.stride_), + current_(reinterpret_cast<internal_type*>( + reinterpret_cast<T*>(rSrc.current_)+offset)) + {} + + void operator++() {current_ += stride_; } + void operator++(int) {current_ += stride_; } + void operator--() {current_ -= stride_; } + void operator--(int) {current_ -= stride_; } + void operator+=(int dy) {current_ += dy*stride_; } + void operator-=(int dy) {current_ -= dy*stride_; } + + bool operator==(StridedArrayIterator const & rhs) const + { return (current_ == rhs.current_); } + + bool operator!=(StridedArrayIterator const & rhs) const + { return (current_ != rhs.current_); } + + bool operator<(StridedArrayIterator const & rhs) const + { return (current_ < rhs.current_); } + + bool operator<=(StridedArrayIterator const & rhs) const + { return (current_ <= rhs.current_); } + + bool operator>(StridedArrayIterator const & rhs) const + { return (current_ > rhs.current_); } + + bool operator>=(StridedArrayIterator const & rhs) const + { return (current_ >= rhs.current_); } + + int operator-(StridedArrayIterator const & rhs) const + { return (current_ - rhs.current_) / stride_; } + + T* operator()() const + { return reinterpret_cast<T*>(current_); } + + T* operator()(int d) const + { return reinterpret_cast<T*>(current_ + d*stride_); } + + int stride_; + internal_type* current_; +}; + +} // namespace basebmp + +#endif /* INCLUDED_BASEBMP_STRIDEDARRAYITERATOR_HXX */ |