LCOV - code coverage report
Current view: top level - basebmp/inc/basebmp - stridedarrayiterator.hxx (source / functions) Hit Total Coverage
Test: libreoffice_filtered.info Lines: 16 16 100.0 %
Date: 2012-08-25 Functions: 29 32 90.6 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2                 :            : /*
       3                 :            :  * This file is part of the LibreOffice project.
       4                 :            :  *
       5                 :            :  * This Source Code Form is subject to the terms of the Mozilla Public
       6                 :            :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7                 :            :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8                 :            :  *
       9                 :            :  * This file incorporates work covered by the following license notice:
      10                 :            :  *
      11                 :            :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12                 :            :  *   contributor license agreements. See the NOTICE file distributed
      13                 :            :  *   with this work for additional information regarding copyright
      14                 :            :  *   ownership. The ASF licenses this file to you under the Apache
      15                 :            :  *   License, Version 2.0 (the "License"); you may not use this file
      16                 :            :  *   except in compliance with the License. You may obtain a copy of
      17                 :            :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18                 :            :  */
      19                 :            : 
      20                 :            : #ifndef INCLUDED_BASEBMP_STRIDEDARRAYITERATOR_HXX
      21                 :            : #define INCLUDED_BASEBMP_STRIDEDARRAYITERATOR_HXX
      22                 :            : 
      23                 :            : #include <basebmp/metafunctions.hxx>
      24                 :            : 
      25                 :            : namespace basebmp
      26                 :            : {
      27                 :            : 
      28                 :            : /** Like vigra::StridedArrayIterator
      29                 :            : 
      30                 :            :     Changed semantics re. DirectionSelector<StridedArrayTag>: stride
      31                 :            :     now counts in <em>raw</em> bytes
      32                 :            : 
      33                 :            :     Adapts given ptr, in a way that iterator increments move forward
      34                 :            :     in strided steps. Stride can, by the way, also be negative
      35                 :            :  */
      36                 :            : template< typename T > class StridedArrayIterator
      37                 :            : {
      38                 :            : public:
      39                 :            :     typedef typename clone_const<T, unsigned char>::type  internal_type;
      40                 :            : 
      41                 :            :     /** Create iterator
      42                 :            : 
      43                 :            :         @param stride
      44                 :            : 
      45                 :            :         Stride in bytes. Given value should better match memory layout
      46                 :            :         of T, as memory gets reinterpret-casted.
      47                 :            :      */
      48                 :    3162490 :     explicit StridedArrayIterator(int stride, T* ptr = 0) :
      49                 :            :         stride_(stride),
      50                 :    3162490 :         current_(reinterpret_cast<internal_type*>(ptr))
      51                 :    3162490 :     {}
      52                 :            : 
      53                 :            :     /** Copy from other StridedArrayIterator, plus given offset
      54                 :            : 
      55                 :            :         @param offset
      56                 :            :         Offset in bytes
      57                 :            :      */
      58                 :     937258 :     StridedArrayIterator( StridedArrayIterator const& rSrc,
      59                 :            :                           int                         offset ) :
      60                 :            :         stride_(rSrc.stride_),
      61                 :            :         current_(reinterpret_cast<internal_type*>(
      62                 :     937258 :                      reinterpret_cast<T*>(rSrc.current_)+offset))
      63                 :     937258 :     {}
      64                 :            : 
      65                 :  267782785 :     void operator++()       {current_ += stride_; }
      66                 :            :     void operator++(int)    {current_ += stride_; }
      67                 :            :     void operator--()       {current_ -= stride_; }
      68                 :            :     void operator--(int)    {current_ -= stride_; }
      69                 :   82043001 :     void operator+=(int dy) {current_ += dy*stride_; }
      70                 :            :     void operator-=(int dy) {current_ -= dy*stride_; }
      71                 :            : 
      72                 :   44687164 :     int operator-(StridedArrayIterator const & rhs) const
      73                 :   44687164 :     { return (current_ - rhs.current_) / stride_; }
      74                 :            : 
      75                 :   95932712 :     bool operator==(StridedArrayIterator const & rhs) const
      76                 :   95932712 :     { return current_ == rhs.current_; }
      77                 :            : 
      78                 :            :     bool operator!=(StridedArrayIterator const & rhs) const
      79                 :            :     { return current_ != rhs.current_; }
      80                 :            : 
      81                 :   43082627 :     bool operator<(StridedArrayIterator const & rhs) const
      82                 :   43082627 :     { return *this - rhs < 0; }
      83                 :            : 
      84                 :            :     bool operator<=(StridedArrayIterator const & rhs) const
      85                 :            :     { return *this - rhs <= 0; }
      86                 :            : 
      87                 :            :     bool operator>(StridedArrayIterator const & rhs) const
      88                 :            :     { return *this - rhs > 0; }
      89                 :            : 
      90                 :            :     bool operator>=(StridedArrayIterator const & rhs) const
      91                 :            :     { return *this - rhs >= 0; }
      92                 :            : 
      93                 :  383514848 :     T* operator()() const
      94                 :  383514848 :     { return reinterpret_cast<T*>(current_); }
      95                 :            : 
      96                 :            :     T* operator()(int d) const
      97                 :            :     { return reinterpret_cast<T*>(current_ + d*stride_); }
      98                 :            : 
      99                 :            : private:
     100                 :            :     int            stride_;
     101                 :            :     internal_type* current_;
     102                 :            : };
     103                 :            : 
     104                 :            : } // namespace basebmp
     105                 :            : 
     106                 :            : #endif /* INCLUDED_BASEBMP_STRIDEDARRAYITERATOR_HXX */
     107                 :            : 
     108                 :            : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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