hostsupport/hostopenvg/src/riArray.h
branchbug235_bringup_0
changeset 53 c2ef9095503a
parent 24 a3f46bb01be2
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hostsupport/hostopenvg/src/riArray.h	Wed Oct 06 17:59:01 2010 +0100
@@ -0,0 +1,242 @@
+#ifndef __RIARRAY_H
+#define __RIARRAY_H
+
+/*------------------------------------------------------------------------
+ *
+ * OpenVG 1.1 Reference Implementation
+ * -----------------------------------
+ *
+ * Copyright (c) 2007 The Khronos Group Inc.
+ * Portions copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and /or associated documentation files
+ * (the "Materials "), to deal in the Materials without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Materials,
+ * and to permit persons to whom the Materials are furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Materials.
+ *
+ * THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE MATERIALS OR
+ * THE USE OR OTHER DEALINGS IN THE MATERIALS.
+ *
+ *//**
+ * \file
+ * \brief	Array class.
+ * \note
+ *//*-------------------------------------------------------------------*/
+
+#ifndef __RIDEFS_H
+#include "riDefs.h"
+#endif
+
+#include <string.h>	//for memcpy
+
+namespace OpenVGRI
+{
+
+//=======================================================================
+
+/*-------------------------------------------------------------------*//*!
+* \brief	An array class similar to std::vector.
+* \param
+* \return
+* \note		Follows std::vector's naming convention (except resizeAndReallocate).
+*//*-------------------------------------------------------------------*/
+
+template <class Item> class Array
+{
+public:
+    friend class Rasterizer;
+
+    Array() : m_array(NULL), m_size(0), m_allocated(0) {}	//throws bad_alloc
+    ~Array()
+    {
+        RI_DELETE_ARRAY(m_array);
+    }
+
+    void		swap(Array& s)
+    {
+        Item* tarray = m_array;
+        m_array = s.m_array;
+        s.m_array = tarray;
+
+        int tsize = m_size;
+        m_size = s.m_size;
+        s.m_size = tsize;
+
+        int tallocated = m_allocated;
+        m_allocated = s.m_allocated;
+        s.m_allocated = tallocated;
+    }
+
+    //if more room is needed, reallocate, otherwise return
+    void		reserve( int items )	//throws bad_alloc
+    {
+        RI_ASSERT( items >= 0 );
+        if( items <= m_allocated )
+            return;	//if there is room already, return
+
+        RI_ASSERT( items > m_allocated );
+
+        Item* newa = RI_NEW_ARRAY(Item, items);	//throws bad_alloc if runs out of memory
+        for(int i=0;i<m_size;i++)
+            newa[i] = m_array[i];
+        RI_DELETE_ARRAY(m_array);
+        m_array = newa;
+        m_allocated = items;
+        //doesn't change size
+    }
+
+    //reserve and change size
+    void		resize( int items )	//throws bad_alloc
+    {
+        reserve( items );	//throws bad_alloc if runs out of memory
+        m_size = items;
+    }
+
+    //resize and allocate exactly the correct amount of memory
+    void		resizeAndReallocate( int items )	//throws bad_alloc
+    {
+        RI_ASSERT( items >= 0 );
+        if( items == m_allocated )
+        {
+            m_size = items;
+            return;
+        }
+
+        if( items == 0 )
+        {
+            RI_DELETE_ARRAY(m_array);
+            m_size = 0;
+            m_allocated = 0;
+            return;
+        }
+
+        Item* newa = RI_NEW_ARRAY(Item, items);	//throws bad_alloc if runs out of memory
+        int copySize = (m_size < items) ? m_size : items;	//min(m_size,items)
+        for(int i=0;i<copySize;i++)
+            newa[i] = m_array[i];
+        RI_DELETE_ARRAY(m_array);
+        m_array = newa;
+        m_allocated = items;
+        m_size = items;		//changes also size
+    }
+    void		clear()
+    {
+        m_size = 0;
+    }
+
+    //sort array (needs operator< defined for Item. Define it with < for increasing order and > for decreasing.)
+    void		sort()
+    {
+        if(m_size <= 1)
+            return;
+        quicksort(0, m_size - 1);
+    }
+
+    void sort(int first, int last)
+    {
+        RI_ASSERT(first <= last);
+        RI_ASSERT((first >= 0) && (last < m_size));
+
+        if (m_size <= 1)
+            return;
+
+        if ((last - first) < 1)
+            return;
+
+        quicksort(first, last);
+#if defined(RI_DEBUG)
+        for (int i = first+1; i <= last; i++)
+        {
+            RI_ASSERT(m_array[i-1] <= m_array[i]);
+        }
+#endif
+    }
+
+    int     findIndex(const Item& item)
+    {
+        for(int i = 0; i < m_size; i++)
+            if (m_array[i] == item)
+                return i;
+        return -1;
+    }
+
+    //remove the first occurrence of an item from the array
+    bool        remove(const Item& item)
+    {
+        int i=0;
+        for(;i<m_size;i++)
+        {
+            if(m_array[i] == item)
+                break;
+        }
+        if(i >= m_size)
+            return false;   //not found
+        for(;i<m_size-1;i++)
+        {
+            m_array[i] = m_array[i+1];
+        }
+        m_size--;
+        return true;
+    }
+
+    RI_INLINE void			push_back( const Item& item )	//throws bad_alloc
+    {
+        if( m_size >= m_allocated )
+            reserve( (!m_allocated) ? 8 : m_allocated * 2 );	//by default, reserve 8. throws bad_alloc if runs out of memory
+        m_array[m_size++] = item;
+    }
+    RI_INLINE int			size() const				{ return m_size; }
+    RI_INLINE Item&			operator[](int i)			{ RI_ASSERT(i >= 0 && i < m_size); return m_array[i]; }
+    RI_INLINE const Item&	operator[](int i) const		{ RI_ASSERT(i >= 0 && i < m_size); return m_array[i]; }
+
+private:
+    Array(const Array& s);				//!< Not allowed.
+    void operator=(const Array& s);		//!< Not allowed.
+
+    void quicksort(int left, int right)
+    {
+        int i = left, j = right;
+        Item x = m_array[(left+right)>>1];
+
+        do
+        {
+            while (m_array[i] < x)
+                i++;
+            while (x < m_array[j])
+                j--;
+            if (i<=j)
+            {
+                Item tmp = m_array[i];
+                m_array[i] = m_array[j];
+                m_array[j] = tmp;
+                i++;
+                j--;
+            }
+        } while (i<=j);
+
+        if(left < j) quicksort(left, j);
+        if(i < right) quicksort(i, right);
+    }
+
+
+    Item*		m_array;
+    int			m_size;
+    int			m_allocated;
+};
+
+//=======================================================================
+
+}	//namespace OpenVGRI
+
+#endif /* __RIARRAY_H */