1120 lines
34 KiB
C++
1120 lines
34 KiB
C++
//----------------------------------------------------------------------------
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// Anti-Grain Geometry - Version 2.4
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// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
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//
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// Permission to copy, use, modify, sell and distribute this software
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// is granted provided this copyright notice appears in all copies.
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// This software is provided "as is" without express or implied
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// warranty, and with no claim as to its suitability for any purpose.
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//
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//----------------------------------------------------------------------------
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// Contact: mcseem@antigrain.com
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// mcseemagg@yahoo.com
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// http://www.antigrain.com
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//----------------------------------------------------------------------------
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#ifndef AGG_ARRAY_INCLUDED
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#define AGG_ARRAY_INCLUDED
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#include <cstddef>
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#include <cstring>
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#include "agg_basics.h"
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namespace agg
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{
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//-------------------------------------------------------pod_array_adaptor
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template<class T> class pod_array_adaptor
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{
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public:
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typedef T value_type;
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pod_array_adaptor(T* array, unsigned _size) :
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m_array(array), m_size(_size) {}
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unsigned size() const { return m_size; }
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const T& operator [] (unsigned i) const { return m_array[i]; }
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T& operator [] (unsigned i) { return m_array[i]; }
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const T& at(unsigned i) const { return m_array[i]; }
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T& at(unsigned i) { return m_array[i]; }
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T value_at(unsigned i) const { return m_array[i]; }
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private:
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T* m_array;
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unsigned m_size;
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};
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//---------------------------------------------------------pod_auto_array
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template<class T, unsigned Size> class pod_auto_array
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{
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public:
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typedef T value_type;
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typedef pod_auto_array<T, Size> self_type;
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pod_auto_array() {}
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explicit pod_auto_array(const T* c)
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{
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memcpy(m_array, c, sizeof(T) * Size);
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}
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const self_type& operator = (const T* c)
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{
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memcpy(m_array, c, sizeof(T) * Size);
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return *this;
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}
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static unsigned size() { return Size; }
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const T& operator [] (unsigned i) const { return m_array[i]; }
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T& operator [] (unsigned i) { return m_array[i]; }
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const T& at(unsigned i) const { return m_array[i]; }
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T& at(unsigned i) { return m_array[i]; }
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T value_at(unsigned i) const { return m_array[i]; }
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private:
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T m_array[Size];
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};
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//--------------------------------------------------------pod_auto_vector
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template<class T, unsigned Size> class pod_auto_vector
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{
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public:
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typedef T value_type;
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typedef pod_auto_vector<T, Size> self_type;
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pod_auto_vector() : m_size(0) {}
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void remove_all() { m_size = 0; }
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void clear() { m_size = 0; }
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void add(const T& v) { m_array[m_size++] = v; }
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void push_back(const T& v) { m_array[m_size++] = v; }
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void inc_size(unsigned _size) { m_size += _size; }
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unsigned size() const { return m_size; }
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const T& operator [] (unsigned i) const { return m_array[i]; }
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T& operator [] (unsigned i) { return m_array[i]; }
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const T& at(unsigned i) const { return m_array[i]; }
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T& at(unsigned i) { return m_array[i]; }
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T value_at(unsigned i) const { return m_array[i]; }
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private:
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T m_array[Size];
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unsigned m_size;
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};
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//---------------------------------------------------------------pod_array
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template<class T> class pod_array
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{
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public:
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typedef T value_type;
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typedef pod_array<T> self_type;
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~pod_array() { pod_allocator<T>::deallocate(m_array, m_size); }
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pod_array() : m_array(0), m_size(0) {}
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pod_array(unsigned _size) :
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m_array(pod_allocator<T>::allocate(_size)),
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m_size(_size)
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{}
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pod_array(const self_type& v) :
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m_array(pod_allocator<T>::allocate(v.m_size)),
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m_size(v.m_size)
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{
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memcpy(m_array, v.m_array, sizeof(T) * m_size);
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}
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void resize(unsigned _size)
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{
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if(_size != m_size)
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{
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pod_allocator<T>::deallocate(m_array, m_size);
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m_array = pod_allocator<T>::allocate(m_size = _size);
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}
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}
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const self_type& operator = (const self_type& v)
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{
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resize(v.size());
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memcpy(m_array, v.m_array, sizeof(T) * m_size);
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return *this;
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}
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unsigned size() const { return m_size; }
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const T& operator [] (unsigned i) const { return m_array[i]; }
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T& operator [] (unsigned i) { return m_array[i]; }
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const T& at(unsigned i) const { return m_array[i]; }
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T& at(unsigned i) { return m_array[i]; }
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T value_at(unsigned i) const { return m_array[i]; }
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const T* data() const { return m_array; }
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T* data() { return m_array; }
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private:
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T* m_array;
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unsigned m_size;
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};
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//--------------------------------------------------------------pod_vector
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// A simple class template to store Plain Old Data, a vector
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// of a fixed size. The data is continous in memory
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//------------------------------------------------------------------------
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template<class T> class pod_vector
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{
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public:
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typedef T value_type;
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~pod_vector() { pod_allocator<T>::deallocate(m_array, m_capacity); }
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pod_vector() : m_size(0), m_capacity(0), m_array(0) {}
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pod_vector(unsigned cap, unsigned extra_tail=0);
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// Copying
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pod_vector(const pod_vector<T>&);
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const pod_vector<T>& operator = (const pod_vector<T>&);
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// Set new capacity. All data is lost, size is set to zero.
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void capacity(unsigned cap, unsigned extra_tail=0);
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unsigned capacity() const { return m_capacity; }
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// Allocate n elements. All data is lost,
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// but elements can be accessed in range 0...size-1.
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void allocate(unsigned size, unsigned extra_tail=0);
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// Resize keeping the content.
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void resize(unsigned new_size);
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void zero()
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{
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memset(m_array, 0, sizeof(T) * m_size);
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}
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void add(const T& v) { m_array[m_size++] = v; }
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void push_back(const T& v) { m_array[m_size++] = v; }
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void insert_at(unsigned pos, const T& val);
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void inc_size(unsigned _size) { m_size += _size; }
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unsigned size() const { return m_size; }
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unsigned byte_size() const { return m_size * sizeof(T); }
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void serialize(int8u* ptr) const;
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void deserialize(const int8u* data, unsigned byte_size);
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const T& operator [] (unsigned i) const { return m_array[i]; }
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T& operator [] (unsigned i) { return m_array[i]; }
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const T& at(unsigned i) const { return m_array[i]; }
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T& at(unsigned i) { return m_array[i]; }
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T value_at(unsigned i) const { return m_array[i]; }
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const T* data() const { return m_array; }
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T* data() { return m_array; }
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void remove_all() { m_size = 0; }
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void clear() { m_size = 0; }
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void cut_at(unsigned num) { if(num < m_size) m_size = num; }
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private:
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unsigned m_size;
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unsigned m_capacity;
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T* m_array;
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};
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//------------------------------------------------------------------------
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template<class T>
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void pod_vector<T>::capacity(unsigned cap, unsigned extra_tail)
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{
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m_size = 0;
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if(cap > m_capacity)
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{
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pod_allocator<T>::deallocate(m_array, m_capacity);
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m_capacity = cap + extra_tail;
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m_array = m_capacity ? pod_allocator<T>::allocate(m_capacity) : 0;
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}
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}
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//------------------------------------------------------------------------
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template<class T>
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void pod_vector<T>::allocate(unsigned _size, unsigned extra_tail)
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{
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capacity(_size, extra_tail);
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m_size = _size;
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}
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//------------------------------------------------------------------------
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template<class T>
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void pod_vector<T>::resize(unsigned new_size)
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{
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if(new_size > m_size)
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{
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if(new_size > m_capacity)
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{
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T* _data = pod_allocator<T>::allocate(new_size);
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memcpy(_data, m_array, m_size * sizeof(T));
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pod_allocator<T>::deallocate(m_array, m_capacity);
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m_array = _data;
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}
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}
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else
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{
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m_size = new_size;
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}
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}
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//------------------------------------------------------------------------
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template<class T> pod_vector<T>::pod_vector(unsigned cap, unsigned extra_tail) :
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m_size(0),
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m_capacity(cap + extra_tail),
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m_array(pod_allocator<T>::allocate(m_capacity)) {}
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//------------------------------------------------------------------------
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template<class T> pod_vector<T>::pod_vector(const pod_vector<T>& v) :
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m_size(v.m_size),
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m_capacity(v.m_capacity),
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m_array(v.m_capacity ? pod_allocator<T>::allocate(v.m_capacity) : 0)
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{
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memcpy(m_array, v.m_array, sizeof(T) * v.m_size);
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}
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//------------------------------------------------------------------------
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template<class T> const pod_vector<T>&
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pod_vector<T>::operator = (const pod_vector<T>&v)
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{
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allocate(v.m_size);
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if(v.m_size) memcpy(m_array, v.m_array, sizeof(T) * v.m_size);
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return *this;
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}
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//------------------------------------------------------------------------
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template<class T> void pod_vector<T>::serialize(int8u* ptr) const
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{
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if(m_size) memcpy(ptr, m_array, m_size * sizeof(T));
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}
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//------------------------------------------------------------------------
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template<class T>
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void pod_vector<T>::deserialize(const int8u* _data, unsigned _byte_size)
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{
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_byte_size /= sizeof(T);
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allocate(_byte_size);
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if(_byte_size) memcpy(m_array, _data, _byte_size * sizeof(T));
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}
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//------------------------------------------------------------------------
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template<class T>
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void pod_vector<T>::insert_at(unsigned pos, const T& val)
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{
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if(pos >= m_size)
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{
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m_array[m_size] = val;
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}
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else
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{
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memmove(m_array + pos + 1, m_array + pos, (m_size - pos) * sizeof(T));
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m_array[pos] = val;
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}
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++m_size;
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}
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//---------------------------------------------------------------pod_bvector
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// A simple class template to store Plain Old Data, similar to std::deque
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// It doesn't reallocate memory but instead, uses blocks of data of size
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// of (1 << S), that is, power of two. The data is NOT contiguous in memory,
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// so the only valid access method is operator [] or curr(), prev(), next()
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//
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// There reallocs occure only when the pool of pointers to blocks needs
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// to be extended (it happens very rarely). You can control the value
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// of increment to reallocate the pointer buffer. See the second constructor.
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// By default, the incremeent value equals (1 << S), i.e., the block size.
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//------------------------------------------------------------------------
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template<class T, unsigned S=6> class pod_bvector
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{
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public:
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enum block_scale_e
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{
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block_shift = S,
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block_size = 1 << block_shift,
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block_mask = block_size - 1
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};
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typedef T value_type;
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~pod_bvector();
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pod_bvector();
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pod_bvector(unsigned block_ptr_inc);
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// Copying
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pod_bvector(const pod_bvector<T, S>& v);
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const pod_bvector<T, S>& operator = (const pod_bvector<T, S>& v);
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void remove_all() { m_size = 0; }
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void clear() { m_size = 0; }
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void free_all() { free_tail(0); }
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void free_tail(unsigned size);
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void add(const T& val);
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void push_back(const T& val) { add(val); }
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void modify_last(const T& val);
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void remove_last();
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int allocate_continuous_block(unsigned num_elements);
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void add_array(const T* ptr, unsigned num_elem)
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{
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while(num_elem--)
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{
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add(*ptr++);
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}
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}
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template<class DataAccessor> void add_data(DataAccessor& data)
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{
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while(data.size())
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{
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add(*data);
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++data;
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}
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}
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void cut_at(unsigned _size)
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{
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if(_size < m_size) m_size = _size;
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}
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unsigned size() const { return m_size; }
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const T& operator [] (unsigned i) const
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{
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return m_blocks[i >> block_shift][i & block_mask];
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}
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T& operator [] (unsigned i)
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{
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return m_blocks[i >> block_shift][i & block_mask];
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}
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const T& at(unsigned i) const
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{
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return m_blocks[i >> block_shift][i & block_mask];
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}
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T& at(unsigned i)
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{
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return m_blocks[i >> block_shift][i & block_mask];
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}
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T value_at(unsigned i) const
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{
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return m_blocks[i >> block_shift][i & block_mask];
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}
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const T& curr(unsigned idx) const
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{
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return (*this)[idx];
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}
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T& curr(unsigned idx)
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{
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return (*this)[idx];
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}
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const T& prev(unsigned idx) const
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{
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return (*this)[(idx + m_size - 1) % m_size];
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}
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T& prev(unsigned idx)
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{
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return (*this)[(idx + m_size - 1) % m_size];
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}
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const T& next(unsigned idx) const
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{
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return (*this)[(idx + 1) % m_size];
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}
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T& next(unsigned idx)
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{
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return (*this)[(idx + 1) % m_size];
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}
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const T& last() const
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{
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return (*this)[m_size - 1];
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}
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T& last()
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{
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return (*this)[m_size - 1];
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}
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unsigned byte_size() const;
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void serialize(int8u* ptr) const;
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void deserialize(const int8u* data, unsigned byte_size);
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void deserialize(unsigned start, const T& empty_val,
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const int8u* data, unsigned byte_size);
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template<class ByteAccessor>
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void deserialize(ByteAccessor data)
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{
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remove_all();
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unsigned elem_size = data.size() / sizeof(T);
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for(unsigned i = 0; i < elem_size; ++i)
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{
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int8u* ptr = (int8u*)data_ptr();
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for(unsigned j = 0; j < sizeof(T); ++j)
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{
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*ptr++ = *data;
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++data;
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}
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++m_size;
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}
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}
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template<class ByteAccessor>
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void deserialize(unsigned start, const T& empty_val, ByteAccessor data)
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{
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while(m_size < start)
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{
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add(empty_val);
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}
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unsigned elem_size = data.size() / sizeof(T);
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for(unsigned i = 0; i < elem_size; ++i)
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{
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int8u* ptr;
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if(start + i < m_size)
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{
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ptr = (int8u*)(&((*this)[start + i]));
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}
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else
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{
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ptr = (int8u*)data_ptr();
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++m_size;
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}
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for(unsigned j = 0; j < sizeof(T); ++j)
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{
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*ptr++ = *data;
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++data;
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}
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}
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}
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const T* block(unsigned nb) const { return m_blocks[nb]; }
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private:
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void allocate_block(unsigned nb);
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T* data_ptr();
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unsigned m_size;
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unsigned m_num_blocks;
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unsigned m_max_blocks;
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T** m_blocks;
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unsigned m_block_ptr_inc;
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};
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//------------------------------------------------------------------------
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template<class T, unsigned S> pod_bvector<T, S>::~pod_bvector()
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{
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if(m_num_blocks)
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{
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T** blk = m_blocks + m_num_blocks - 1;
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while(m_num_blocks > 0)
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{
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pod_allocator<T>::deallocate(*blk, block_size);
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--blk;
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--m_num_blocks;
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}
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}
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pod_allocator<T*>::deallocate(m_blocks, m_max_blocks);
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}
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//------------------------------------------------------------------------
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template<class T, unsigned S>
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void pod_bvector<T, S>::free_tail(unsigned _size)
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{
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if(_size < m_size)
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{
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unsigned nb = (_size + block_mask) >> block_shift;
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while(m_num_blocks > nb)
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{
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pod_allocator<T>::deallocate(m_blocks[--m_num_blocks], block_size);
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}
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if(m_num_blocks == 0)
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{
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pod_allocator<T*>::deallocate(m_blocks, m_max_blocks);
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m_blocks = 0;
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m_max_blocks = 0;
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}
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m_size = _size;
|
|
}
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class T, unsigned S> pod_bvector<T, S>::pod_bvector() :
|
|
m_size(0),
|
|
m_num_blocks(0),
|
|
m_max_blocks(0),
|
|
m_blocks(0),
|
|
m_block_ptr_inc(block_size)
|
|
{
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class T, unsigned S>
|
|
pod_bvector<T, S>::pod_bvector(unsigned block_ptr_inc) :
|
|
m_size(0),
|
|
m_num_blocks(0),
|
|
m_max_blocks(0),
|
|
m_blocks(0),
|
|
m_block_ptr_inc(block_ptr_inc)
|
|
{
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class T, unsigned S>
|
|
pod_bvector<T, S>::pod_bvector(const pod_bvector<T, S>& v) :
|
|
m_size(v.m_size),
|
|
m_num_blocks(v.m_num_blocks),
|
|
m_max_blocks(v.m_max_blocks),
|
|
m_blocks(v.m_max_blocks ?
|
|
pod_allocator<T*>::allocate(v.m_max_blocks) :
|
|
0),
|
|
m_block_ptr_inc(v.m_block_ptr_inc)
|
|
{
|
|
unsigned i;
|
|
for(i = 0; i < v.m_num_blocks; ++i)
|
|
{
|
|
m_blocks[i] = pod_allocator<T>::allocate(block_size);
|
|
memcpy(m_blocks[i], v.m_blocks[i], block_size * sizeof(T));
|
|
}
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class T, unsigned S>
|
|
const pod_bvector<T, S>&
|
|
pod_bvector<T, S>::operator = (const pod_bvector<T, S>& v)
|
|
{
|
|
unsigned i;
|
|
for(i = m_num_blocks; i < v.m_num_blocks; ++i)
|
|
{
|
|
allocate_block(i);
|
|
}
|
|
for(i = 0; i < v.m_num_blocks; ++i)
|
|
{
|
|
memcpy(m_blocks[i], v.m_blocks[i], block_size * sizeof(T));
|
|
}
|
|
m_size = v.m_size;
|
|
return *this;
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class T, unsigned S>
|
|
void pod_bvector<T, S>::allocate_block(unsigned nb)
|
|
{
|
|
if(nb >= m_max_blocks)
|
|
{
|
|
T** new_blocks = pod_allocator<T*>::allocate(m_max_blocks + m_block_ptr_inc);
|
|
|
|
if(m_blocks)
|
|
{
|
|
memcpy(new_blocks,
|
|
m_blocks,
|
|
m_num_blocks * sizeof(T*));
|
|
|
|
pod_allocator<T*>::deallocate(m_blocks, m_max_blocks);
|
|
}
|
|
m_blocks = new_blocks;
|
|
m_max_blocks += m_block_ptr_inc;
|
|
}
|
|
m_blocks[nb] = pod_allocator<T>::allocate(block_size);
|
|
m_num_blocks++;
|
|
}
|
|
|
|
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class T, unsigned S>
|
|
inline T* pod_bvector<T, S>::data_ptr()
|
|
{
|
|
unsigned nb = m_size >> block_shift;
|
|
if(nb >= m_num_blocks)
|
|
{
|
|
allocate_block(nb);
|
|
}
|
|
return m_blocks[nb] + (m_size & block_mask);
|
|
}
|
|
|
|
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class T, unsigned S>
|
|
inline void pod_bvector<T, S>::add(const T& val)
|
|
{
|
|
*data_ptr() = val;
|
|
++m_size;
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class T, unsigned S>
|
|
inline void pod_bvector<T, S>::remove_last()
|
|
{
|
|
if(m_size) --m_size;
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class T, unsigned S>
|
|
void pod_bvector<T, S>::modify_last(const T& val)
|
|
{
|
|
remove_last();
|
|
add(val);
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class T, unsigned S>
|
|
int pod_bvector<T, S>::allocate_continuous_block(unsigned num_elements)
|
|
{
|
|
if(num_elements < block_size)
|
|
{
|
|
data_ptr(); // Allocate initial block if necessary
|
|
unsigned rest = block_size - (m_size & block_mask);
|
|
unsigned index;
|
|
if(num_elements <= rest)
|
|
{
|
|
// The rest of the block is good, we can use it
|
|
//-----------------
|
|
index = m_size;
|
|
m_size += num_elements;
|
|
return index;
|
|
}
|
|
|
|
// New block
|
|
//---------------
|
|
m_size += rest;
|
|
data_ptr();
|
|
index = m_size;
|
|
m_size += num_elements;
|
|
return index;
|
|
}
|
|
return -1; // Impossible to allocate
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class T, unsigned S>
|
|
unsigned pod_bvector<T, S>::byte_size() const
|
|
{
|
|
return m_size * sizeof(T);
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class T, unsigned S>
|
|
void pod_bvector<T, S>::serialize(int8u* ptr) const
|
|
{
|
|
unsigned i;
|
|
for(i = 0; i < m_size; i++)
|
|
{
|
|
memcpy(ptr, &(*this)[i], sizeof(T));
|
|
ptr += sizeof(T);
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
template<class T, unsigned S>
|
|
void pod_bvector<T, S>::deserialize(const int8u* _data, unsigned _byte_size)
|
|
{
|
|
remove_all();
|
|
_byte_size /= sizeof(T);
|
|
for(unsigned i = 0; i < _byte_size; ++i)
|
|
{
|
|
T* ptr = data_ptr();
|
|
memcpy(ptr, _data, sizeof(T));
|
|
++m_size;
|
|
_data += sizeof(T);
|
|
}
|
|
}
|
|
|
|
|
|
// Replace or add a number of elements starting from "start" position
|
|
//------------------------------------------------------------------------
|
|
template<class T, unsigned S>
|
|
void pod_bvector<T, S>::deserialize(unsigned start, const T& empty_val,
|
|
const int8u* _data, unsigned _byte_size)
|
|
{
|
|
while(m_size < start)
|
|
{
|
|
add(empty_val);
|
|
}
|
|
|
|
_byte_size /= sizeof(T);
|
|
for(unsigned i = 0; i < _byte_size; ++i)
|
|
{
|
|
if(start + i < m_size)
|
|
{
|
|
memcpy(&((*this)[start + i]), _data, sizeof(T));
|
|
}
|
|
else
|
|
{
|
|
T* ptr = data_ptr();
|
|
memcpy(ptr, _data, sizeof(T));
|
|
++m_size;
|
|
}
|
|
_data += sizeof(T);
|
|
}
|
|
}
|
|
|
|
|
|
//---------------------------------------------------------block_allocator
|
|
// Allocator for arbitrary POD data. Most usable in different cache
|
|
// systems for efficient memory allocations.
|
|
// Memory is allocated with blocks of fixed size ("block_size" in
|
|
// the constructor). If required size exceeds the block size the allocator
|
|
// creates a new block of the required size. However, the most efficient
|
|
// use is when the average reqired size is much less than the block size.
|
|
//------------------------------------------------------------------------
|
|
class block_allocator
|
|
{
|
|
struct block_type
|
|
{
|
|
int8u* data;
|
|
unsigned size;
|
|
};
|
|
|
|
public:
|
|
void remove_all()
|
|
{
|
|
if(m_num_blocks)
|
|
{
|
|
block_type* blk = m_blocks + m_num_blocks - 1;
|
|
while(m_num_blocks--)
|
|
{
|
|
pod_allocator<int8u>::deallocate(blk->data, blk->size);
|
|
--blk;
|
|
}
|
|
pod_allocator<block_type>::deallocate(m_blocks, m_max_blocks);
|
|
}
|
|
m_num_blocks = 0;
|
|
m_max_blocks = 0;
|
|
m_blocks = 0;
|
|
m_buf_ptr = 0;
|
|
m_rest = 0;
|
|
}
|
|
|
|
~block_allocator()
|
|
{
|
|
remove_all();
|
|
}
|
|
|
|
block_allocator(unsigned block_size, unsigned block_ptr_inc=256-8) :
|
|
m_block_size(block_size),
|
|
m_block_ptr_inc(block_ptr_inc),
|
|
m_num_blocks(0),
|
|
m_max_blocks(0),
|
|
m_blocks(0),
|
|
m_buf_ptr(0),
|
|
m_rest(0)
|
|
{
|
|
}
|
|
|
|
|
|
int8u* allocate(unsigned size, unsigned alignment=1)
|
|
{
|
|
if(size == 0) return 0;
|
|
if(size <= m_rest)
|
|
{
|
|
int8u* ptr = m_buf_ptr;
|
|
if(alignment > 1)
|
|
{
|
|
unsigned align =
|
|
(alignment - unsigned((size_t)ptr) % alignment) % alignment;
|
|
|
|
size += align;
|
|
ptr += align;
|
|
if(size <= m_rest)
|
|
{
|
|
m_rest -= size;
|
|
m_buf_ptr += size;
|
|
return ptr;
|
|
}
|
|
allocate_block(size);
|
|
return allocate(size - align, alignment);
|
|
}
|
|
m_rest -= size;
|
|
m_buf_ptr += size;
|
|
return ptr;
|
|
}
|
|
allocate_block(size + alignment - 1);
|
|
return allocate(size, alignment);
|
|
}
|
|
|
|
|
|
private:
|
|
void allocate_block(unsigned size)
|
|
{
|
|
if(size < m_block_size) size = m_block_size;
|
|
if(m_num_blocks >= m_max_blocks)
|
|
{
|
|
block_type* new_blocks =
|
|
pod_allocator<block_type>::allocate(m_max_blocks + m_block_ptr_inc);
|
|
|
|
if(m_blocks)
|
|
{
|
|
memcpy(new_blocks,
|
|
m_blocks,
|
|
m_num_blocks * sizeof(block_type));
|
|
pod_allocator<block_type>::deallocate(m_blocks, m_max_blocks);
|
|
}
|
|
m_blocks = new_blocks;
|
|
m_max_blocks += m_block_ptr_inc;
|
|
}
|
|
|
|
m_blocks[m_num_blocks].size = size;
|
|
m_blocks[m_num_blocks].data =
|
|
m_buf_ptr =
|
|
pod_allocator<int8u>::allocate(size);
|
|
|
|
m_num_blocks++;
|
|
m_rest = size;
|
|
}
|
|
|
|
unsigned m_block_size;
|
|
unsigned m_block_ptr_inc;
|
|
unsigned m_num_blocks;
|
|
unsigned m_max_blocks;
|
|
block_type* m_blocks;
|
|
int8u* m_buf_ptr;
|
|
unsigned m_rest;
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//------------------------------------------------------------------------
|
|
enum quick_sort_threshold_e
|
|
{
|
|
quick_sort_threshold = 9
|
|
};
|
|
|
|
|
|
//-----------------------------------------------------------swap_elements
|
|
template<class T> inline void swap_elements(T& a, T& b)
|
|
{
|
|
T temp = a;
|
|
a = b;
|
|
b = temp;
|
|
}
|
|
|
|
|
|
//--------------------------------------------------------------quick_sort
|
|
template<class Array, class Less>
|
|
void quick_sort(Array& arr, Less less)
|
|
{
|
|
if(arr.size() < 2) return;
|
|
|
|
typename Array::value_type* e1;
|
|
typename Array::value_type* e2;
|
|
|
|
int stack[80];
|
|
int* top = stack;
|
|
int limit = arr.size();
|
|
int base = 0;
|
|
|
|
for(;;)
|
|
{
|
|
int len = limit - base;
|
|
|
|
int i;
|
|
int j;
|
|
int pivot;
|
|
|
|
if(len > quick_sort_threshold)
|
|
{
|
|
// we use base + len/2 as the pivot
|
|
pivot = base + len / 2;
|
|
swap_elements(arr[base], arr[pivot]);
|
|
|
|
i = base + 1;
|
|
j = limit - 1;
|
|
|
|
// now ensure that *i <= *base <= *j
|
|
e1 = &(arr[j]);
|
|
e2 = &(arr[i]);
|
|
if(less(*e1, *e2)) swap_elements(*e1, *e2);
|
|
|
|
e1 = &(arr[base]);
|
|
e2 = &(arr[i]);
|
|
if(less(*e1, *e2)) swap_elements(*e1, *e2);
|
|
|
|
e1 = &(arr[j]);
|
|
e2 = &(arr[base]);
|
|
if(less(*e1, *e2)) swap_elements(*e1, *e2);
|
|
|
|
for(;;)
|
|
{
|
|
do i++; while( less(arr[i], arr[base]) );
|
|
do j--; while( less(arr[base], arr[j]) );
|
|
|
|
if( i > j )
|
|
{
|
|
break;
|
|
}
|
|
|
|
swap_elements(arr[i], arr[j]);
|
|
}
|
|
|
|
swap_elements(arr[base], arr[j]);
|
|
|
|
// now, push the largest sub-array
|
|
if(j - base > limit - i)
|
|
{
|
|
top[0] = base;
|
|
top[1] = j;
|
|
base = i;
|
|
}
|
|
else
|
|
{
|
|
top[0] = i;
|
|
top[1] = limit;
|
|
limit = j;
|
|
}
|
|
top += 2;
|
|
}
|
|
else
|
|
{
|
|
// the sub-array is small, perform insertion sort
|
|
j = base;
|
|
i = j + 1;
|
|
|
|
for(; i < limit; j = i, i++)
|
|
{
|
|
for(; less(*(e1 = &(arr[j + 1])), *(e2 = &(arr[j]))); j--)
|
|
{
|
|
swap_elements(*e1, *e2);
|
|
if(j == base)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if(top > stack)
|
|
{
|
|
top -= 2;
|
|
base = top[0];
|
|
limit = top[1];
|
|
}
|
|
else
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
//------------------------------------------------------remove_duplicates
|
|
// Remove duplicates from a sorted array. It doesn't cut the
|
|
// tail of the array, it just returns the number of remaining elements.
|
|
//-----------------------------------------------------------------------
|
|
template<class Array, class Equal>
|
|
unsigned remove_duplicates(Array& arr, Equal equal)
|
|
{
|
|
if(arr.size() < 2) return arr.size();
|
|
|
|
unsigned i, j;
|
|
for(i = 1, j = 1; i < arr.size(); i++)
|
|
{
|
|
typename Array::value_type& e = arr[i];
|
|
if(!equal(e, arr[i - 1]))
|
|
{
|
|
arr[j++] = e;
|
|
}
|
|
}
|
|
return j;
|
|
}
|
|
|
|
//--------------------------------------------------------invert_container
|
|
template<class Array> void invert_container(Array& arr)
|
|
{
|
|
int i = 0;
|
|
int j = arr.size() - 1;
|
|
while(i < j)
|
|
{
|
|
swap_elements(arr[i++], arr[j--]);
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------binary_search_pos
|
|
template<class Array, class Value, class Less>
|
|
unsigned binary_search_pos(const Array& arr, const Value& val, Less less)
|
|
{
|
|
if(arr.size() == 0) return 0;
|
|
|
|
unsigned beg = 0;
|
|
unsigned end = arr.size() - 1;
|
|
|
|
if(less(val, arr[0])) return 0;
|
|
if(less(arr[end], val)) return end + 1;
|
|
|
|
while(end - beg > 1)
|
|
{
|
|
unsigned mid = (end + beg) >> 1;
|
|
if(less(val, arr[mid])) end = mid;
|
|
else beg = mid;
|
|
}
|
|
|
|
//if(beg <= 0 && less(val, arr[0])) return 0;
|
|
//if(end >= arr.size() - 1 && less(arr[end], val)) ++end;
|
|
|
|
return end;
|
|
}
|
|
|
|
//----------------------------------------------------------range_adaptor
|
|
template<class Array> class range_adaptor
|
|
{
|
|
public:
|
|
typedef typename Array::value_type value_type;
|
|
|
|
range_adaptor(Array& array, unsigned start, unsigned _size) :
|
|
m_array(array), m_start(start), m_size(_size)
|
|
{}
|
|
|
|
unsigned size() const { return m_size; }
|
|
const value_type& operator [] (unsigned i) const { return m_array[m_start + i]; }
|
|
value_type& operator [] (unsigned i) { return m_array[m_start + i]; }
|
|
const value_type& at(unsigned i) const { return m_array[m_start + i]; }
|
|
value_type& at(unsigned i) { return m_array[m_start + i]; }
|
|
value_type value_at(unsigned i) const { return m_array[m_start + i]; }
|
|
|
|
private:
|
|
Array& m_array;
|
|
unsigned m_start;
|
|
unsigned m_size;
|
|
};
|
|
|
|
//---------------------------------------------------------------int_less
|
|
inline bool int_less(int a, int b) { return a < b; }
|
|
|
|
//------------------------------------------------------------int_greater
|
|
inline bool int_greater(int a, int b) { return a > b; }
|
|
|
|
//----------------------------------------------------------unsigned_less
|
|
inline bool unsigned_less(unsigned a, unsigned b) { return a < b; }
|
|
|
|
//-------------------------------------------------------unsigned_greater
|
|
inline bool unsigned_greater(unsigned a, unsigned b) { return a > b; }
|
|
}
|
|
|
|
#endif
|